文献类型：期刊文献

英文题名：Synchronous Photocatalytic Redox Conversion of Chromium(VI) and Arsenic(III) by Bimetallic Fe/Ti Metal-Organic Frameworks

作者：Zhong, Xin[1];Xu, Jing[1];Song, Sijia[1];Li, Hu[2];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Sch Life & Environm Sci, Shaoxing 312000, Peoples R China;[2]Shanghai Qiyang Testing Technol Co, Shanghai 201100, Peoples R China

年份：2025

卷号：64

期号：3

起止页码：1443

外文期刊名：INORGANIC CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:001397346800001)、、EI(收录号：20250517784892)、Scopus(收录号：2-s2.0-85216290221)、WOS

基金：Financial support from the Research Fund Program of Natural Science Foundation of Zhejiang Province (LY23B070003) and National Natural Science Foundation of China (no. 22106107) is acknowledged.

语种：英文

外文关键词：Bioremediation - Indium phosphide - Iron compounds - Layered semiconductors - Liquid crystals - Metal-Organic Frameworks - Metamorphic rocks - Photocatalytic activity - Photolysis - Photooxidation - Titanium dioxide

外文摘要：In this work, bimetallic organic frameworks NH2-MOFs(Fe, Ti) with different Fe3+/Ti4+ molar ratios were prepared by a hydrothermal method for the synchronous redox transformation of Cr(VI) and As(III). These results showed that NH2-MIL-125(Ti) was less effective in the photocatalytic removal of Cr(VI), whereas NH2-MIL-88B(Fe) was less effective in the photocatalytic oxidative removal of As(III). Due to the introduction of Fe3+, the photocatalytic reduction removal of Cr(VI) (23.04 -> 42.56%) and the photocatalytic oxidation removal of As(III) (5.58 -> 26.09%) by NH2-MOFs(Fe, Ti) were significantly enhanced. Among them, NH2-MIL-88B(Fe0.6Ti0.4) exhibited the best performance in the photoreduction of Cr(VI) and photo-oxidation of As(III), which balanced the insufficiency of monometallic MOFs(Fe/Ti). In this case, the total removal of Cr(VI) and As(III) by NH2-MIL-88B(Fe0.6Ti0.4) was found to be 94.19 and 83.54%, respectively. The excellent photocatalytic property could account for the ligand-to-metal charge transfer (LMCT), where photogenerated e - generated by -NH2 group excitation was transferred to the active site Fe-O clusters, as well as e - transported along Ti -> O -> Fe (metal-to-metal charge transfer, MMCT). Therefore, the synergetic effect of LMCT and MMCT could efficiently inhibit the recombination of e --h + pairs, improving the photocatalytic performance of NH2-MOFs(Fe, Ti).