Two Birds with One Stone Strategy: Simultaneous Removal of Cr(VI) and Cr(III) Efficiently by Porous ZnIn 2 S 4 /SBA-15 Nanorods

作者：Xiao Dan Sun, Zhangxin Duan, Jingjing Song, Hanxing Yang, Kai Yan, Zhenhua Tian, Dangge Gao, Jianzhong Ma · 发表于：ACS Applied Materials & Interfaces · 年份：2025 · DOI：10.1021/acsami.4c17425 · 被引用次数：8 · 研究领域：Advanced Photocatalysis Techniques、Adsorption and biosorption for pollutant removal、Extraction and Separation Processes

Carcinogen Cr(VI) is reduced efficiently into Cr(III) by a photocatalyst, but the produced Cr(III) is difficult to transfer from the photocatalytic active site. The “two birds with one stone” strategy is proposed to realize the in situ growth of ZnIn 2 S 4 nanoplates on SBA-15 and the creation of separated active sites, in which ZnO loading on the porous SBA-15 nanorod was used as a zinc source. Obtained samples ZnIn 2 S 4 /SBA-15 (ZIS/SBA) showed the redshift of the absorption band and better separation of photoinduced carriers than pristine ZnIn 2 S 4, due to its smaller size and S defect. All of the Cr(VI) was reduced to Cr(III) by the ZIS/SBA sample during the photocatalytic process, which was 2 times higher than pristine ZnIn 2 S 4 . Moreover, 92.8% of Cr(III) was adsorbed simultaneously during photocatalysis due to the electrostatic interaction from SBA-15. In addition, the ZIS/SBA sample showed good recycling stability after 5 times cycles, providing a new strategy for the in situ growth of ZnIn 2 S 4 on the surface of porous materials and a novel way for the simultaneous removal of Cr(VI) and Cr(III) during photocatalysis.