通讯机构：
[Yanfang Xia; Min Liu] C;College of Nuclear Science and Technology, University of South China, Hengyang, 421001 China<&wdkj&>Zhuhai Tsinghua University Research Institute Innovation Center, 101 University Ave, Tangjiawan, Zhuhai, 519000 China<&wdkj&>College of Nuclear Science and Technology, University of South China, Hengyang, 421001 China
摘要：
In this article, REFe0.5Cr0.5O3 (RE = La, Y) is prepared by sol–gel method, and the structure is characterized and analyzed by X‐ray diffraction, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Mössbauer spectroscopy, and magnetism. A reference for future studies of the effect of clusters on Cr‐doped iron‐based calcium is provided. The synthesis of REFe0.5Cr0.5O3 (RE = La, Y) using the sol–gel method is focused and their structural differences are investigated. The results of X‐ray diffraction show that the change of ion radius at position A leads to varying degrees of octahedral distortion and spatial group structure. The scanning electron microscopy analysis reveals micron‐level particles with clear boundaries, while energy‐dispersive X‐ray spectroscopy and room temperature Mössbauer spectra indicate the presence of Fe/Cr clusters in the sample and the transitional valence of iron. Disorder in the B position leads to a saturation moment that is lower than the theoretical value. The thermomagnetic profile shows a reversal of magnetization due to the interaction between the single‐ion magnetic anisotropy and the antisymmetric Dzyaloshinskii–Moriya (DM) interaction, with a broader peak is observed due to cluster formation. The difference in negative magnetic field is due to the difference in net magnetic moment caused by different DM intensities.
期刊：
Proceedings of SPIE - The International Society for Optical Engineering,2023年12610:146 ISSN：0277-786X
通讯作者：
Du, Xuecheng(duxuecheng@usc.edu.cn)
作者机构：
[Zhao, Xu; Du, Xuecheng; Xiong, Xu] School of Nuclear Science and Technology, University of South China, Hengyang City;421001, China;[Chen, Zhi; Jiang, Wei] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China;[Zhao, Xu; Du, Xuecheng; Xiong, Xu] 421001, China
作者机构：
[Wei, Yuezhou; Hamza, Mohammed F.] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Hamza, Mohammed F.] Nucl Mat Author, POB 530, Cairo, Egypt.;[Guibal, Eric] IMT Mines Ales, Polymers Compos & Hybrids PCH, Ales, France.;[Wei, Yuezhou] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai, Peoples R China.;[Fouda, Amr] Al Azhar Univ, Fac Sci, Bot & Microbiol Dept, Cairo 11884, Egypt.
通讯机构：
[Guibal, E.] P;[Wei, Y.] S;Polymers Composites and Hybrids (PCH), France;School of Nuclear Science and Technology, China
关键词：
An efficient magnetic composite sorbent was synthesized by incorporation of magnetite nanoparticles into polymer matrix (obtained by formaldehyde polycondensation of guanidine and amino hydroxynaphthalene sulfonic acid);Temkin equations fitted sorption isotherms while uptake kinetics are successfully modeled with the pseudo-first order rate equation;The sensitivity of uranyl ions to reduction explains the complementary metal sorption and enhanced selectivity under UV irradiation for both synthetic and complex industrial solutions;UV exposure improves the stability of sorption properties at recycling (uranium being fully desorbed using nitric acid solution);UV irradiation allows to both increase uranium sorption capacity and enhance uptake kinetics
作者：
Hamza, Mohammed F.;Guibal, Eric;Althumayri, Khalid;Wei, Yuezhou;Eid, Ahmed M.;...
期刊：
Chemical Engineering Journal,2023年454:140155 ISSN：1385-8947
通讯作者：
Guibal, Eric(eric.guibal@mines-ales.fr)
作者机构：
[Wei, Yuezhou; Hamza, Mohammed F.] Univ South China, Sch Nucl Sci & Technol, Heng Yang 421001, Peoples R China.;[Hamza, Mohammed F.] Nucl Mat Author, POB 530, Cairo, Egypt.;[Guibal, Eric] IMT Mines Ales, Polymers Compos & Hybrids PCH, Ales, France.;[Althumayri, Khalid] Taibah Univ, Coll Sci, Dept Chem, Al Madinah Al Munawarah 30002, Saudi Arabia.;[Wei, Yuezhou] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai, Peoples R China.
通讯机构：
[Eric Guibal] P;[Yuezhou Wei] S;Polymers Composites and Hybrids (PCH), IMT Mines Ales, Alès, France<&wdkj&>School of Nuclear Science and Technology, University of South China, Heng Yang 421001, China<&wdkj&>School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
关键词：
Easy synthesis of a highly efficient sorbent for cesium through ready condensation of acetamido-aminomethanesulfonic acid (via formaldehyde reaction);Fast cesium uptake onto microparticles (fitted by the pseudo-first order rate equation);Good sorption performance in seawater;Limited toxicity against Gram+ and Gram- bacteria and pathogenic yeast, reduced cytotoxicity against normal cells (but inhibiting cancerous cells);Remarkable desorption and sorbent recycling using 0.3 M HNO3 solution;Selectivity against alkali and alkali-earth metal ions
摘要：
A new sorbent (ACES-F micro-particles) is readily synthesized by the one-pot reaction of N-(2-acetamido)-2-aminoethanesulfonic acid with formaldehyde (poly-condensation reaction). The mesoporous sorbent is charac-terized by BET analysis (SBET: approximate to 6 m2 g-1), SEM-EDX (N: approximate to 7-8 % and S: 5 %), FTIR spectroscopy (identification of amine, sulfonic groups and their interactions with metal ions), TGA, elemental analysis, and titration (pHPZC: approximate to 5.7). The study of pH effect on Cs(I) shows an optimum close to 8 (with intermediary optimum at pH 4, associated with different reactive groups). The micron-size sorbent shows fast sorption (equilibrium in 60 min) and the pseudo-first order rate equation fits the kinetic profile. The sorption isotherm reaches up to 1.99 mmol Cs g-1; the Langmuir equation models isotherm profiles. The sorption decreases with increasing temperature; sorption is exothermic. Cesium uptake is affected by the presence of NaCl; however, even in large excess of salt (i. e., 4 M) sorption remains relatively high (loss <60 %). Selectivity is confirmed by the remarkable preference of the sorbent for Cs against alkali and other competitor metal ions, especially at pHeq approximate to 7. Metal desorption is highly effective using 0.3 M HNO3 solutions: complete desorption occurs in 30 min. The sorbent can be recycled for at least five cycles (losses <3 %). The interest of ACES-F for cesium recovery from seawater is confirmed by the study of Cs(I) sorption (and other major elements) from Vietnam and Egypt samples. The safety of the sorbent for aqueous bodies is evaluated by the cytotoxicity of the sorbent (limited against normal cells but highly reactive for cancerous cells); while the sorbent shows interesting antimicrobial properties for Gram+, Gram-and path-ogenic yeast.
通讯机构：
[Jinsen Xie; Tao Yu] A;Authors to whom correspondence should be addressed.<&wdkj&>School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
关键词：
KLT-40S;assembly design;optimal burnup lattice;local power peaking factor;power-flattening design
作者机构：
[余清远; 赵鹏程] School of Nuclear Science and Technology, University of South China, Hunan, Hengyang;421001, China;[马誉高; 张英楠] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China;Department of Engineering Physics, Tsinghua University, Beijing
作者机构：
[于涛; 赵鹏程; 赵亚楠; 杨涛] School of Nuclear Science and Technology, University of South China, Hunan, Hengyang;421001, China;Hunan Engineering and Technology Research Center for Virtual Nuclear Reactor, University of South China, Hunan, Hengyang;[于涛; 赵鹏程; 赵亚楠; 杨涛] 421001, China<&wdkj&>Hunan Engineering and Technology Research Center for Virtual Nuclear Reactor, University of South China, Hunan, Hengyang;[于涛; 赵鹏程; 赵亚楠; 杨涛] 421001, China
作者：
Hamza, Mohammed F.;Guibal, Eric;Wei, Yuezhou;Ning, Shunyan
期刊：
Chemical Engineering Journal,2023年464:142638 ISSN：1385-8947
通讯作者：
Wei, YZ;Guibal, E
作者机构：
[Ning, Shunyan; Wei, Yuezhou; Hamza, Mohammed F.] Univ South China, Sch Nucl Sci & Technol, Heng Yang 421001, Peoples R China.;[Guibal, Eric; Guibal, E] IMT Mines Ales, Polymers Compos & Hybrids PCH, Ales, France.;[Wei, Yuezhou] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai, Peoples R China.
通讯机构：
[Wei, YZ ] U;[Guibal, E ] I;Univ South China, Sch Nucl Sci & Technol, Heng Yang 421001, Peoples R China.;IMT Mines Ales, Polymers Compos & Hybrids PCH, Ales, France.;Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai, Peoples R China.
关键词：
The functionalization of the copolymer of;maleic anhydride withN;N'-methylenebisacrylamide (MaMb) obtained by;the reaction of pristine sorbent with thiocarbazide (TcMaMb) increases the density;and diversity of reactive groups;The chemical derivative strongly enhances the;sorption properties of the material for Th(IV);removal;Faster kinetics are obtained together with doubled sorption capacity at saturation;The selectivity for thorium binding from;complex synthetic solutions (especially at pH;>4) and real ore leachate (in acidic solution but;with lower sorption capacities) is enhanced by;the grafting of thiocarbazide;The readily functionalization of MaMb with thiocarbazide opens promising perspective for;the recovery of thorium from complex solutions
通讯机构：
[Wang, Hongqing; Liao, Yun] H;[Wang, Meng] S;Hunan key laboratory for the design and application of actinide complexes, University of South China, Hengyang, Hunan 421001, PR China. Electronic address:;School of Nuclear Science and Technology, University of South China, Hengyang, Hunan 421001, China. Electronic address:;Hunan key laboratory for the design and application of actinide complexes, University of South China, Hengyang, Hunan 421001, PR China. Electronic address:
作者机构：
[郝帅; 刘敏; 夏良树] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[李斌; 刘占元] Department of Radiochemistry, China Institute of Atomic Energy, Beijing;102413, China;[李先俊] China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen
作者机构：
[Li, Yongmei; Li, Chunguang] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Li, Yongmei; Liu, Longcheng; Meng, Shuo; Li, Chunguang] Univ South China, R&D & Modeling Ctr Treatment & Disposal Radioact, Hengyang 421001, Peoples R China.;[Liu, Longcheng] Royal Inst Technol KTH, Chem Engn, S-10044 Stockholm, Sweden.;[Liu, Longcheng] Beijing Res Inst Chem Engn & Met, Beijing 101149, Peoples R China.
通讯机构：
[Chunguang Li] S;[Longcheng Liu] R;R & D and Modeling Center for Treatment and Disposal of Radioactive Waste, University of South China, Hengyang 421001, China<&wdkj&>Chemical Engineering, Royal Institute of Technology KTH, Stockholm 10044, Sweden<&wdkj&>Beijing Research Institute of Chemical Engineering and Metallurgy, Beijing 101149, China<&wdkj&>School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China<&wdkj&>R & D and Modeling Center for Treatment and Disposal of Radioactive Waste, University of South China, Hengyang 421001, China
通讯机构：
[Yanfang Xia; Min Liu] C;College of Nuclear science and Technology, University of South China, Hengyang, 421001 China<&wdkj&>College of Nuclear science and Technology, University of South China, Hengyang, 421001 China<&wdkj&>Zhuhai Tsinghua University Research Institute Innovation Center, 101 University Ave, Tangjiawan, Zhuhai, 519000 China
摘要：
<jats:sec><jats:label /><jats:p>Herein, the effects of different Sr content doping on the crystal structure and electronic structure of La<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Sr<jats:sub><jats:italic>x</jats:italic></jats:sub>FeO<jats:sub>3−<jats:italic>δ</jats:italic></jats:sub> (LSFO‐<jats:italic>x</jats:italic>, <jats:italic>x</jats:italic> = 0, 0.2, 0.5, 0.8, 1.0) are studied by X‐ray diffraction (XRD) and Mössbauer spectroscopy. It is shown in the XRD results that the structure of LSFO‐<jats:italic>x</jats:italic> changes from orthorhombic (Pnma [#62]) to cubic (Pm‐3m (#221)) to tetragonal (I4/mmm (#139)) with increasing strontium doping. It is shown in Mössbauer spectrum analysis that with the gradual increase of Sr doping, iron ions finally change from +3 oxidation state to +4 oxidation state after passing through an intermediate oxidation state of +3.5. The Fe<jats:sup>3.5+</jats:sup> state can result from rapid electron exchange (Fe<jats:sup>3+</jats:sup> + Fe<jats:sup>4+</jats:sup> ⇋ Fe<jats:sup>4+</jats:sup> + Fe<jats:sup>3+</jats:sup>) between iron ions of different oxidation states within the crystal structure; the study provides some reference for future research to study the effect of iron‐oxidation state on the specific activity of strontium‐doped LaFeO<jats:sub>3</jats:sub>.</jats:p></jats:sec>
