文献类型：期刊文献

英文题名：Synergistic effects in simultaneous photocatalytic removal of Cr(VI) and As (III) by bimetallic NH2-MOF(InxFe1 x)

作者：Zhong, Xin[1];Xu, Jing[1];Song, Sijia[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China

年份：2025

卷号：690

外文期刊名：APPLIED SURFACE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:001425777800001)、、EI(收录号：20250717849418)、Scopus(收录号：2-s2.0-85217234554)、WOS

基金：Financial support from the Research Fund Program of Natural Sci-ence Foundation of Zhejiang Province (LY23B070003) , and National Natural Science Foundation of China (No. 22106107) .

语种：英文

外文关键词：Bimetallic MOFs; Cr(VI); As(III); Adsorption; Photocatalytic redox; Synchronous removal

外文摘要：This work revealed that NH2-MIL-68(In) was ineffective for the removal of Cr(VI) by adsorption and photocatalytic reduction, and NH2-MIL-88B(Fe) had almost no effect on the photocatalytic oxidation of As(III). With the increase of Fe3+ doping concentration, the removal of Cr(VI) by adsorption-photoreduction and As(III) by photo-oxidation obviously increased. Amongst, NH2-MOF(In0.2Fe0.8) exhibited the best photocatalytic performance, with total removal rates of 71.75 % for Cr(VI) and 46.64 % for As(III), and the total removal amounts of Cr(VI) and As(III) were 10.62 mg/g and 3.54 mg/g, respectively. Besides, the photoreduction of Cr(VI) by NH2MOF(In0.2Fe0.8) was about 2.4 times higher than that of NH2-MIL-68(In), and the photo-oxidation of As(III) was 1.59 and 1.67 times higher than that of NH2-MIL-88B(Fe) and NH2-MIL-68(In), respectively. Owing to the modulation between In and Fe ions, the synergistic effect of ligand-to-metal and metal-to-metal charge transfer contributed to the dissociation of e -h+ pairs, rapid charge migration, which improved the photocatalytic efficiency. In addition, -NH2 were the critical reaction sites for metal adsorption-photoreduction, which served as a dual donor of protons and electrons during Cr(VI) adsorption and photoreduction. Eventually, quenching experiments and EPR spectra indicated that e , h+, center dot OH and center dot O2 were the main active species.