摘要：
The efficient removal of radionuclide uranium is crucial for sustainable nuclear energy and achieving a zero-carbon loop. In this study, we synthesized MXene/MnO2 nanocomposites and evaluated their ability to adsorb and reduce uranium. The results showed that the nanocomposites achieved a uranium removal rate of 99% and an adsorption capacity of 696 mg/g. Adsorption experiments were conducted under different conditions, including pH, cation, anion, and humic acid, and the uranium removal rate by the composite remained high at 91%, 70%, and 60% under the influence of pH = 4.97, 1.0 mM CaCl2, and 20 mg/L humic acid, respectively. The XRD and SEM analyses revealed that the uranium element was removed by the reduction and fixation of the composite material. These findings indicate that the MXene/MnO2 composite is an effective adsorption cleaning agent for the purification of radioactive nuclear wastewater, which has significant implications for pollution control.
摘要：
To facilitate the effective monitoring of human health and environmental quality, it is essential to develop highquality gas sensors for trimethylamine (TEA) with stable sensing sensitivity and low resistance fluctuations in a wide range of humid atmospheres. To this end, a novel Bubble-like Co3O4 tube was fabricated through a ZIF-67 intermediate-assisted thermal decomposition strategy, and its surface morphology and nanostructure were comprehensively investigated. Furthermore, a systematic comparison of the gas sensing properties between Rodlike Co3O4 and Bubble-like Co3O4 was also conducted. The results demonstrated that the introduction of ZIF-67 intermediate not only decreased the baseline resistance of the Bubble-like Co3O4 sensor but also enhanced its gassensing performance. Specifically, the response value of the sensor fabricated using Bubble-like Co3O4 for detecting 100 ppm TEA at 180 degrees C was around ten times higher than that of the Rod-like Co3O4 sensor, while achieving a low detection limit of 55 ppb. Furthermore, the gas sensor exhibited excellent selectivity and antihumidity stability, with negligible variation in response value even after 30 days, retaining approximately 98 % of the initial value. This remarkable sensing-performance can be attributed to several factors, including the large specific surface area, abundant oxygen vacancies, and efficient Co3+/Co2+ catalyzing. Overall, this work sheds new light on the rational design of high-performance TEA sensing materials for practical applications.
作者机构：
[Luo, Xiao-Qing; Zhu, Weihua; Xu, Xiaofeng; Liu, Qin-Ke; Luo, XQ; Chen, Zhiyong; Wang, Xin-Lin] Univ South China, Sch Elect Engn, Nano Technol & Adv Laser Mfg, Hunan Prov Key Lab Ultra Fast Micro, Hengyang 421001, Peoples R China.;[Li, Yan] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Liu, W. M.] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.;[Wang, Xin-Lin] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Luo, XQ ] U;Univ South China, Sch Elect Engn, Nano Technol & Adv Laser Mfg, Hunan Prov Key Lab Ultra Fast Micro, Hengyang 421001, Peoples R China.
摘要：
The bound states in the continuum (BICs) in optical metasurfaces have latterly received prominent attention for their ultrahigh quality factors and the promise that they hold for realizing lowthreshold nanolasers, high-harmonic generation, and slow-light devices. In this scenario, the flexible tuning of the BIC is at the heart of multifunctional and tunable metadevices underpinning the central role in the modulation of optical spectral responses. Most BIC-inspired works are limited to single types of BICs modes only affected by the structural perturbation without tunable functionality, while different types of BIC modes have received little attention in manipulating the spectral line shapes in optical metasurface. Here, we show that the simultaneous generation and tailored interplay of two types of BIC modes can empower the realization of tailorable spectral lineshape manipulation in all-dielectric metasurfaces. In particular, the magnetic symmetry-protected BICs and accidental BIC result from the preserved reflection symmetry and geometrical parameter perturbation, respectively. The varied asymmetric parameters and the polarization angle of the incident light are responsible for the generation and interplay of the symmetry-protected and accidental quasi-BIC modes. Additionally, the interplaying quasi-BICs enable the implementation of the dual-wavelength passive optical switches throughout the related telecom bands, and can exhibit the tunable spectral features of different types of Fano resonances and EIT analog-based slow-light effect. These results could offer exploration potential for the development of multifunction and high-performance metadevices.
作者机构：
[Yao, Yuan; Chen, Yong] Univ South China, Coll Mech Engn, Hengyang 421101, Peoples R China.;[Feng, Xiaowei; Luo, Tiegang; Han, Shengli; Zheng, Kaihong] Guangdong Acad Sci, Inst New Mat, Natl Engn Res Ctr Powder Met Titanium & Rare Met, Guangdong Prov Key Lab Met Toughening Technol & Ap, Guangzhou 510650, Peoples R China.
通讯机构：
[Tiegang Luo; Kaihong Zheng] A;Authors to whom correspondence should be addressed.<&wdkj&>Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, Institute of New Materials, Guangdong Academy of Sciences, National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals, Guangzhou 510650, China
摘要：
In the field of metal matrix composites, it is a great challenge to improve the strength and elongation of magnesium matrix composites simultaneously. In this work, xTC4/AZ31 (x = 0.5, 1, 1.5 wt.%) composites were fabricated by spark plasma sintering (SPS) followed by hot extrusion. Scanning electron microscopy (SEM) showed that nano-TC4 (Ti-6Al-4V) was well dispersed in the AZ31 matrix. We studied the microstructure evolution and tensile properties of the composites, and analyzed the strengthening mechanism of nano-TC4 on magnesium matrix composites. The results showed that magnesium matrix composites with 1 wt.%TC4 had good comprehensive properties; compared with the AZ31 matrix, the yield strength (YS) was increased by 20.4%, from 162 MPa to 195 MPa; the ultimate tensile strength (UTS) was increased by 11.7%, from 274 MPa to 306 MPa, and the failure strain (FS) was increased by 21.1%, from 7.6% to 9.2%. The improvement in strength was mainly due to grain refinement and good interfacial bonding between nano-TC4 and the Mg matrix. The increase in elongation was the result of grain refinement and a weakened texture.
摘要：
Microstructure refinement and mechanical properties enhancement were achieved by utilizing friction stir processing (FSP) as post-treatment to 6061 aluminum alloy fabricated by wire and arc additive manufacturing (WAAM). FSP led to a significant microstructure refinement and porosity reduction. The average grain size decreased from approximately 128 mu m to about 5 mu m. Because of the refined microstructure and the reduced porosity, the average microhardness, yield strength, and ultimate tensile strength increased by 31.5 %, 23.3 % and 6.0 %, respectively. The elongation difference between the horizontal and vertical direction was reduced from 4.5 % to 1.4 %. The properties anisotropy caused by delamination was weakened by the FSP. This work provides a valid option for the quality assurance of the WAAM process of aluminum alloys.
关键词：
CO2 electrochemical reduction;Cu nanoparticles;Cu-based MOFs;Electrocatalysts;Electrochemical reduction reaction
摘要：
The electrochemical CO 2 reduction reaction (CO 2 ER) is an emerging process that involves utilizing CO 2 to produce valuable chemicals and fuels by consuming excess electricity from renewable sources. Recently, Cu and Cu-based nanoparticles, as earth-abundant and economical metal sources, have been attracting significant interest. The chemical and physical properties of Cu-based nanoparticles are modified by different strategies, and CO 2 can be converted into multicarbon products. Among various Cu-based nanoparticles, Cu-based metal-organic frameworks (MOFs) are gaining increasing interest in the field of catalysis because of their textural, topological, and electrocatalytic properties. In this minireview, we summarized and highlighted the main achievements in the research on Cu-based MOFs and their advantages in the CO 2 ER as electrocatalysts, supports, or precursors.(c) 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
作者机构：
[Chen, Zenghui; Luo, Yonggang] Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultrafast Micro Nano Technol &, Hengyang 421001, Peoples R China.;[Deng, Li] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Chen, Zenghui] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Chen, ZH ] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
Optical frequency comb;I;Q demodulation;Optical vector network analysis
摘要：
An ultrafast optical vector network analysis (OVNA) based on dual optical frequency comb (OFC) and I/Q demodulation technology is proposed and demonstrated. The responses of the DUT with broadband are characterized by propagating the signal OFC through the DUT, and then detecting interference signals using digital signal processor with retrieval algorithm. Without the need of the acousto-optic modulator or optical filter in the scheme, the frequency aliasing can be eliminated by using the I/Q demodulation module, so that the spectral utilization efficiency of the OFC is improved significantly. Meanwhile, the wideband measurement with high acquisition rates can also be achieved. In simulation process, the single spectrum of HCN molecule with linewidth of 1 GHz and bandwidth of 10 GHz can be rapidly measured, and the measurement time is only 1 mu s in theory. Our proposed OVNA opens the door to realize a real-time detection in the field of trace molecular sensing.
作者机构：
[Liu, Yi-Lin; Yan, Cheng; Zeng, Qingyi] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;[Wang, Gui-Gen; Yan, Cheng; Han, Jie-Cai] Harbin Inst Technol Shenzhen, Sch Mat Sci & Engn, Shenzhen Key Lab Adv Mat, Shenzhen 518055, Peoples R China.;[Yan, Cheng] Univ Sydney, Fac Sci, Sch Chem, Sydney 2006, Australia.;[Han, Jie-Cai] Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Peoples R China.
通讯机构：
[Cheng Yan; Yi-Lin Liu; Cheng Yan Cheng Yan Cheng Yan; Yi-Lin Liu Yi-Lin Liu Yi-Lin Liu] C;[Gui-Gen Wang; Gui-Gen Wang Gui-Gen Wang Gui-Gen Wang] S;College of Mechanical Engineering, University of South China, Hengyang, 421001 P. R. China<&wdkj&>Shenzhen Key Laboratory for Advanced Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055 P. R. China<&wdkj&>School of Chemistry, Faculty of Science, The University of Sydney, Sydney, 2006 Australia<&wdkj&>College of Mechanical Engineering, University of South China, Hengyang, 421001 P. R. China<&wdkj&>Shenzhen Key Laboratory for Advanced Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055 P. R. China
摘要：
This review article presents advances in 2D nanomaterial supported single metal atom catalysts (SACs) toward photo/electrocatalysis, with the special emphasis on the superiorities of 2D nanosheets as host materials. Advanced ex/in situ microscopic and spectroscopic approaches as well as rational design strategies of 2D‐SACs, are comprehensively summarized. The future challenges and opportunities on the 2D nanosheets‐supported SACs for photo/electrocatalysis are highlighted. Abstract Single‐atom catalysts (SACs) attract intensive attention owing to their unmatched catalytic activities and high atom utilization. Besides metal species themselves, the substrates play a key role for the improvement of their catalytic performance by optimizing metal–support interactions and coordination structures. In the past years, various 2D nanomaterials have been employed to anchor single metal atoms for renewable energy technologies and other important industrial processes. Tremendous progress has been achieved in the development of 2D supported SACs for advanced energy conversion reactions. This article provides a comprehensive and critical review of up‐to‐date advances in the field of 2D supported SACs. The state‐of‐the‐art characterizations including ex/in situ microscopic and spectroscopic techniques are summarized with the emphasis on their specific superiorities in identifying the reactive sites and reaction mechanisms, combined with theoretical calculations and experimental results. A brief overview of various reactions including hydrogen evolution reaction (HER), oxygen evolution reaction (OER), two‐electron oxygen reduction reaction (2e‐ORR), carbon dioxide reduction (CO2RR), and nitrogen reduction reaction (NRR) under the framework of electrocatalysis and photocatalysis, is presented on basis of versatile 2D nanomaterial supports. Last, the key challenges and opportunities in this rising field are highlighted.
摘要：
Precise evaluation of endometrial injury is significant to clinical decision-making in gynecological disease and assisted reproductive technology. However, there is a lack of assessment methods for endometrium in vivo. In this research, we intend to develop quantitative imaging markers with optical coherence tomography (OCT)/ultrasound (US) integrated imaging system through intrauterine endoscopic imaging. OCT/US integrated imaging system was established as our previous research reported. The endometrial injury model was established and after treatment, OCT/US integrated imaging and uterus biopsy was performed to evaluate the endometrial thickness, number of superficial fold, and intrauterine area. According to the results, three quantitative indexes acquired from OCT/US image and HE staining have the same trend and have a strong relationship with the severity of the endometrial injury. Accordingly, we developed three imaging markers for quantitative analysis of endometrial injury in vivo, which provided a precise mode for endometrium evaluation in clinical practice.
摘要：
Developing efficient and cost-effective electrode materials is of essential significance to advance various energy storage technologies, among which flexible supercapacitors hold great promise to meet the growing popularity of wearable electronics. Herein, we report a homologous strategy to parallelly synthesize phosphorus-doped ZnCo2O4 (P-ZnCo2O4@NCC) and nitrogen-doped carbon (NC@NCC) both derived from ZnCo-metal-organic frameworks (MOFs) precursors in-situ grown on dopamine-modified carbon cloth (NCC) as conductive substrates. Impressively, the as-obtained P-ZnCo2O4@NCC can achieve a high specific capacitance of 2702.2 mF.cm(-2) at 1 m.cm(-2) with the capacitance retention rate exceeding 70.6% at 10 mA.cm(-2), demonstrating the outstanding rate capability. Moreover, flexible solid-state hybrid supercapacitors, using P-ZnCo2O4@NCC as positive electrode and NC@NCC as negative electrode, are assembled with poly(vinyl alcohol) (PVA)/KOH as the gel electrolyte, which deliver the energy density of 11.9 mWh.cm(-3) when the power density reaches up to 47.3 mW.cm(-3). In addition, 85.15% of the initial specific capacitance is maintained after 5000 continuous cycles and no obvious capacitance decay is observed under different bending conditions, revealing the excellent cycling stability and flexibility. As a proof-of-concept demonstration, two as-assembled hybrid supercapacitors connected in series can light up a red light-emitting diode (LED) under the bending angle of 180 degrees, heralding the feasibility for broad practical applications.
期刊：
IEEE Transactions on Vehicular Technology,2023年72(7):9542-9554 ISSN：0018-9545
通讯作者：
Deng, XJ
作者机构：
[Xia, Yunzhi; Yang, Laurence T.; Deng, Xianjun; Liu, Shenghao] Huazhong Univ Sci & Technol, Hubei Engn Res Ctr Big Data Secur, Sch Cyber Sci & Engn, Hubei Key Lab Distributed Syst Secur, Wuhan 430074, Peoples R China.;[Yi, Lingzhi] Zhongnan Univ Econ & Law, Sch Informat & Safety Engn, Wuhan 430073, Peoples R China.;[Zhu, Chenlu] Huazhong Univ Sci & Technol, Hubei Chutian Expressway Digital Technol Co Ltd, Wuhan 430073, Peoples R China.;[Tang, Xiao] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Deng, Xianjun] Huazhong Univ Sci & Technol, Hubei Engn Res Ctr Big Data Secur, Sch Cyber Sci & Engn, Hubei Key Lab Distributed Syst Secur, Wuhan 430074, Peoples R China.
通讯机构：
[Deng, XJ ] ;Huazhong Univ Sci & Technol, Hubei Engn Res Ctr Big Data Secur, Sch Cyber Sci & Engn, Hubei Key Lab Distributed Syst Secur, Wuhan 430074, Peoples R China.
关键词：
Wireless sensor network;intelligent transportation;trust management;coverage reliability;confident information coverage
摘要：
Wireless sensor nodes are vulnerable to interference or intrusion, especially in the tunnel scenario of intelligent transportation, which leads to potential risks to network security and reliability. Reliable coverage can ensure data perception and transmission, which helps to strengthen the reliability and quality of service (QoS) of wireless sensor networks (WSNs). Existing coverage models, such as the disc model, do not consider malicious intrusion, which still has a great gap with the realistic application scenarios. Therefore, it is urgent to study a coverage model considering network intrusion and node reliability. In this paper, a novel trust-based reliable confident information coverage (T-RCIC) model is proposed based on the confident information coverage (CIC) model and trust management. Trust management is adopted to determine whether a node is trusted, critical trusted, or malicious. If a node is identified as malicious, all its functions will be blocked. For critical trusted nodes, the trust value is utilized to determine the trust feature distance to reduce its proportion of coverage estimation. Furthermore, the reliable coverage degree (RCD) is defined to evaluate coverage reliability from node trust value and reliable coverage percentage. Simulation results indicate that the proposed model inherits the advantages of the CIC model in the spatial correlation and can effectively identify malicious nodes. The proposed T-RCIC model can significantly enhance coverage reliability.
期刊：
JOURNAL OF PHYSICAL CHEMISTRY B,2023年127(46):10088-10096 ISSN：1520-6106
通讯作者：
Kang, XM;Qian, L
作者机构：
[Zheng, Huayan; Zhang, Song; Zhang, Guoqiang; Song, Ya] Moutai Inst, Dept Food Sci & Engn, Renhuai 564502, Guizhou, Peoples R China.;[Miao, Xiaohe] Westlake Univ, Instrumentat & Serv Ctr Phys Sci, Hangzhou 310024, Zhejiang, Peoples R China.;[Kang, Xiaomin] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Qian, Lu; Qian, L] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.
通讯机构：
[Kang, XM ] U;[Qian, L ] S;Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.
摘要：
Polyacrylamide (PAM) is one of the most important water-soluble polymers that has been extensively applied in water treatment, drug delivery, and flexible electronic devices. The basic properties, e.g., microstructure, nanomechanics, and solubility, are deeply involved in the performance of PAM materials. Current research has paid more attention to the development and expansion of the macroscopic properties of PAM materials, and the study of the mechanism involved with the roles of water and ions on the properties of PAM is insufficient, especially for the behaviors of neutral amide side groups. In this study, single molecule force spectroscopy was combined with molecular dynamic (MD) simulations, atomic force microscope imaging, and dynamic light scattering to investigate the effects of monovalent ions on the nanomechanics and molecular conformations of neutral PAM (NPAM). These results show that the single-molecule elasticity and conformation of NPAM exhibit huge variation in different monovalent salt solutions. NPAM adopts an extended conformation in aqueous solutions of strong hydrated ion (acetate), while transforms into a collapse globule in the existence of weakly hydrated ion (SCN(-)). It is believed that the competition between intramolecular and intermolecular weak interactions plays a key role to adjust the molecular conformation and elasticity of NPAM. The competition can be largely influenced by the type of monovalent ions through hydration or a chaotropic effect. Methods utilized in this study provide a means to better understand the Hofmeister effect of ions on other macromolecules containing amide groups at the single-molecule level.
作者机构：
[Tang, Dewen; Che, Zhiyuan; Jiang, Rui] Univ South China, Sch Mech Engn, Hengyang 412000, Hunan, Peoples R China.;[Tang, Dewen; Che, Zhiyuan; Jiang, Rui] Univ South China, Key Lab Nucl Facil Emergency Safety Technol & Equi, Hengyang 412000, Hunan, Peoples R China.
通讯机构：
[Tang, DW ] U;Univ South China, Sch Mech Engn, Hengyang 412000, Hunan, Peoples R China.;Univ South China, Key Lab Nucl Facil Emergency Safety Technol & Equi, Hengyang 412000, Hunan, Peoples R China.
摘要：
To investigate the effect of different oxidation times on the oxidation behavior of Zr-Sn-Nb alloy in a high-temperature steam environment at 1250 degree celsius, steam oxidation tests were conducted on the Zr-Sn-Nb alloy at 1250 degree celsius for durations ranging from 100 to 5000 s. Microstructural and elemental composition analyses of the Zr-Sn-Nb alloy were carried out using scanning electron microscopy, energy-dispersive x-ray spectroscopy, and optical microscopy. The results showed that in the initial stages of oxidation (0-1000 s), the weight gain per unit area followed a parabolic trend. After 2500 s of oxidation, the weight gain rate significantly increased. In the later stages of oxidation (after 4000 s), the weight gain curve transitioned from a parabolic shape to a linear law. With increasing oxidation time, the thickness of the oxide layer gradually increased. In the early stages (0-2500 s), the growth rate of the oxide layer thickness was relatively slow, but the appearance of micro-pores and cracks was observed. However, after 2500 s, the steam oxidation rate of the Zr-Sn-Nb alloy significantly accelerated, leading to fracture and failure of the alloy specimens. The change in oxide layer thickness over time followed a parabolic law before 2500 s and a linear law after 2500 s. The growth curve of the alpha-Zr(O) layer within 5000 s also followed a parabolic law.
通讯机构：
[Chen, Y ] U;Univ South China, Coll Mech Engn, Hengyang 421101, Peoples R China.
关键词：
physical vapor deposition;laser micro-melting;NiCr coating;molecular dynamics;dislocation density
摘要：
Micron-sized coatings prepared using physical vapor deposition (PVD) technology can peel off in extreme environments because of their low adhesion. Laser micro-melting (LMM) technology can improve the properties of the fabricated integrated material due to its metallurgical combinations. However, the microstructural changes induced by the high-energy laser beam during the LMM process have not been investigated. In this study, we used the PVD-LMM technique to prepare NiCr coatings with a controlled thickness. The microstructural changes in the NiCr alloy coatings during melting and cooling crystallization were analyzed using molecular dynamics simulations. The simulation results demonstrated that the transition range of the atoms in the LMM process fluctuated synchronously with the temperature, and the hexagonal close-packed (HCP) structure increased. After the cooling crystallization, the perfect dislocations of the face-centered cubic (FCC) structure decreased significantly. The dislocation lines were mainly 1/6 <112> imperfect dislocations, and the dislocation density increased by 107.7%. The dislocations in the twinning region were affected by the twin boundaries and slip surfaces. They were plugged in their vicinity, resulting in a considerably higher dislocation density than in the other regions, and the material hardness increased significantly. This new technique may be important for the technological improvement of protective coatings on Zr alloy surfaces.
摘要：
The isothermal steam oxidation behavior of the Zr-Sn-Nb alloy at 1050 degrees C was studied. In this study, the oxidation weight gain of Zr-Sn-Nb samples with oxidation durations ranging from 100 s to 5000 s was calculated. The oxidation kinetic properties of the Zr-Sn-Nb alloy were obtained. The macroscopic morphology of the alloy was directly observed and compared. The microscopic surface morphology, cross-section morphology, and element content of the Zr-Sn-Nb alloy were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and energy disperse spectroscopy (EDS). According to the results, the cross-sectional structure of the Zr-Sn-Nb alloy consisted of ZrO2, alpha-Zr(O), and prior-beta. During the oxidation process, its weight gain versus oxidation time curve followed a parabolic law. The thickness of the oxide layer increases. Micropores and cracks gradually appear on the oxide film. Similarly, the thicknesses of ZrO2 and alpha-Zr versus oxidation time were in accordance with the parabolic law.
作者机构：
[Bai, Xingwang; Wang, Zhuorui; Que, Mingxin] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;[Zhou, Xiangman] China Three Gorges Univ, Coll Mech & Power Engn, Yichang 443002, Hubei, Peoples R China.
作者机构：
[Yang, Tong; Liu, Hao; Zhao, Li; Wu, Wenxing; Lei, Yuantao; Qiu, Changjun] Univ South China, Sch Mech Engn, Hengyang 421200, Peoples R China.;[Chen, Pinghu] Shenzhen Univ, Addit Mfg Inst, Coll Mechatron & Control Engn, Shenzhen 518000, Peoples R China.
通讯机构：
[Changjun Qiu] S;School of Mechanical Engineering, University of South China, Hengyang 421200, China<&wdkj&>Author to whom correspondence should be addressed.
作者机构：
[Gao, Beibei; Cai, Tao; Tan, Jing; Zhang, Qingyan; Zeng, Qingyi] Univ South China, Sch Resources & Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Liu, Yi-Lin] Univ South China, Coll Mech Engn, Hengyang 421001, Hunan, Peoples R China.;[Chang, Sheng] Nanjing Univ Aeronaut & Astronaut, Sch Energy & Power Engn, Nanjing 210016, Jiangsu, Peoples R China.;[Zhao, Shuaifei] Deakin Univ, Inst Frontier Mat IFM, Geelong, Vic 3216, Australia.;[Wu, Suqing] Wenzhou Univ, Coll Life & Environm Sci, Natl & Local Joint Engn Res Ctr Ecol Treatment Tec, Key Lab Zhejiang Prov Water Environm & Marine Biol, Wenzhou 325000, Peoples R China.
通讯机构：
[Qingyi Zeng] S;[Yi-Lin Liu] C;College of Mechanical Engineering, University of South China, Hengyang, Hunan, 421001, China<&wdkj&>School of Resources & Environment and Safety Engineering, University of South China, Hengyang, Hunan, 421001, China
摘要：
A cobalt (Co)-doped perovskite molybdenum trioxide (alpha-MoO3) catalyst (Co-MO) was synthesized by a facile pyrolysis strategy and used for degrading various organic contaminants via peroxymonosulfate (PMS) activation. The doped Co was inserted in the inter space between the octahedron [MoO6], facilitating the growth of the alpha-MoO3 crystal on the [010] direction. This unique structure accelerated the activation of PMS as the Co-MO could function as a carrier for electron transfer to facilitate the Co(II)/Co(III) cycle in the Co-MO/PMS sys-tem. As a result, the Co-MO/PMS system showed noticeable activity for removing 100% bisphenol A (BPA) under a broad conditions within 30 min. The radical quenching test and electron paramagnetic resonance analysis revealed that singlet oxygen (1O2) was the main active species for BPA degradation in the Co-MO/PMS system, while free radicals, such as O2 center dot-, SO4 center dot-and center dot OH, were also produced as the intermediate species. Furthermore, the carrier mechanism may enable the Co-MO/PMS system maintain relatively high performance during repeat use, and also excellent adaptability was revealed by the well function in various water matrices and high activity in degrading various refractory organic pollutants. Our findings pave a useful avenue for the rational design of novel cobalt-doped catalysts with high catalytic performance toward wide environmental applications.
