摘要：
Poly(triazine imide) synthesized by the molten salt route with incorporation of Li+ and Cl- ions (PTI/Li+Cl-) was prepared by rational controlling of the washing extent. The surface transformation of the phase-pure PTI framework incurred by thorough washing has been confirmed by a systematic analysis based on x-ray diffraction, Ultraviolet Raman, atomic force microscope, and x-ray photoelectron spectroscopy measurements. Uranyl ion adsorption experiments further support the surface structural transformation from triazine-unit PTI to heptazine-based graphitic carbon nitride. Efforts on the exploration of PTI material application should be mainly directed toward the waterless fields to give good repeatability. Graphical Abstract The surface transformation of the phase-pure PTI/LiCl from triazine-based structure to heptazine-based g-C3N4 framwork incurred by thorough washing has been detected by a systematic analysis based on XRD, Ultraviolet Raman, AFM and XPS measurements, and further confirmed by uranyl ion adsorption experiments.
作者机构：
[Zhao, Yubao; Wang, Wenqin] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Wang, Ruibin] Univ South China, Hunan Key Lab Design & Applicat Actinide Complexe, Hengyang 421001, Peoples R China.
通讯机构：
[Prof. Yubao Zhao] S;[Dr. Ruibin Wang] H;School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001 P.R. China<&wdkj&>Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, 421001 P.R. China
摘要：
<jats:title>Abstract</jats:title><jats:p>Ag/BiVO<jats:sub>4</jats:sub> that can serve as a visible light‐driven photocatalyst was synthesized by a simple one‐step hydrothermal method. The morphology and structure were analyzed by SEM and XRD, and the optical electrochemical properties were investigated by spectroscopic experiments. The experimental results found the introduction of Ag can significantly improve the photocatalytic performance of BiVO<jats:sub>4</jats:sub> irradiated by a 10 W white LED. Among them, Ag/BiVO<jats:sub>4</jats:sub>(Ag : Bi=1 : 20) gives the best reduction activity: the reduction ratio of Cr(VI) hits 99.3 %. This result shows that the activity of BiVO<jats:sub>4</jats:sub> for photocatalytic reduction of chromium can increase over 6‐fold by the introduction of Ag with a suitable amount. Exploration experiments of reusability show that the material has high photocatalytic performance.</jats:p>
作者机构：
[Mei, Lei; Yuan, Liyong; Chai, Zhifang; Liu, Kang; Yu, Jipan] Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.;[Zhao, Yubao; Chen, Siyu] Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Chai, Zhifang] Chinese Acad Sci, Inst Ind Technol, Engn Lab Adv Energy Mat, Ningbo 315201, Peoples R China.
通讯机构：
[Mei, Lei] C;Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.
关键词：
1,6-addition;Diarylmethane;p-QMs;Uranyl
摘要：
A direct 1,6-addition route of p-QMs to synthesize substituted diarylmethanes catalyzed by uranyl ion was developed. In our approach, the salient feature of this transformation is that abundant, underexploited, neglected and sequestrable depleted uranium made the reaction more sustainable. Moreover, diarylmethane derivatives were delivered in moderate to high yields with broad scope and functional group tolerance. Facile operation and mild conditions offer a practical and attractive protocol. (C) 2020 Elsevier Ltd. All rights reserved.
作者机构：
[Zhao, Yu-Bao; Zhang, Xiao-Lin] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Mei, Lei; Zhang, Xiao-Lin; Hu, Kong-Qiu; Chai, Zhi-Fang; Shi, Wei-Qun] Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.;[Wang, Yi-Tong] China Int Engn Consulting Corp, Beijing 100089, Peoples R China.
通讯机构：
[Zhao, Yu-Bao] U;[Shi, Wei-Qun] C;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.
摘要：
<![CDATA[We report five novel uranyl coordination polymers, [(CH_(3))_(2)NH_(2)]UO_(2)(BTPCA) (<b>1 ), [(CH_(3))_(2)NH_(2)]UO_(2)(BTPCA) (<b>2 ), [(CH_(3))_(2)NH_(2)]_(2)[UO_(2)(BTPCA)][UO_(2)(BTPCA)]·(H_(2)O)_(5.5) (<b>3 ), [(CH_(3))_(2)NH_(2)]_(2)(UO_(2))_(2)(BTPCA)_(2)·(H_(2)O)_(3) (<b>4 ), and [(CH_(3))_(2)NH_(2)]UO_(2)(BTPCA) (<b>5 ), by the utilization of semirigid ligand 1,1′,1″-(benzene-1,3,5-triyl)tripiperidine-4-carboxylic acid (H_(3)BTPCA) and uranyl nitrate through solvothermal reactions. Single-crystal X-ray diffraction analysis reveals that the five compounds share a similar structure composition and local coordination mode to the exclusion of disordered water or DMF molecules. Each UO_(2)(COO)_(3)~(–) motif is connected to six neighboring units through three BTPCA~(3–) ligands, generating an infinite uranyl honeycomb (6, 3) net. The structures of all the five compounds consist of 2D honeycomb nets of various degrees of distortions, which are induced by the flexibility of piperidine rings. The dimethylamine cations and solvent molecules fill in the space between layers. Therefore, these five compounds are isomers in a broad sense. Notably, both compounds <b>3 and <b>4 possess 2-fold interpenetrated structures. For compound <b>5 , the distance between the neighboring 2D honeycomb nets is 7.253 ?. This is the largest distance between the 2D honeycomb nets in uranyl-based coordination polymers, to the best of our knowledge. In addition, compounds <b>1 , <b>2 , and <b>4 are also characterized by infrared spectroscopy (IR), thermogravimetric analysis (TG), powder X-ray diffraction (PXRD), and luminescence properties.]]>
作者机构：
[Zhao, Yubao; Qiu, Liang; Li, Hui; Fan, Zao; Zhai, Wei] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Hoffmann, Michael R.; Zhao, Yubao] CALTECH, Linde Robinson Lab, Pasadena, CA 91125 USA.
通讯机构：
[Zhao, Yubao] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
摘要：
BiOBr samples with different facets were prepared and used for photocatalytic reduction of hexavalent chromium under visible light. The results reveal that BiOBr dominated with {110} facets giving a specific rate constant 3 times as high as BiOBr with {001} facets, and its much stronger internal electric field was believed to be the main reason.
