孙琼
+
其他联系方式
暂无内容
论文成果
ZnIn<sub>2</sub>S<sub>4</sub> quantum dot-TiO<sub>2</sub> inverse opal composites: Unveiling Z-scheme photocatalysis through experimental and theoretical insights
- 发布时间：2025-07-14
- 点击次数：
- 关键字：RHB DYE; ORGANIC POLLUTANTS; TIO2; PHOTODEGRADATION; DEGRADATION; HETEROJUNCTION; WATER; DOTS
- 摘要：A photocatalyst composed of indium-zinc-sulfide quantum dots modified inverse opal titanium dioxide (ZIS QDsIOT) was synthesized and utilized for the degradation of various organic dyes under sunlight. Electron microscopy images revealed uniform dispersion of ZIS QDs, ranging in size from 2 to 5 nm, on the surface of IOT within an orderly three-dimensional porous structure. Photocatalytic tests demonstrated that the apparent kinetic constants of ZIS QDs-IOT were 19, 8, and 7 times higher than those of bare IOT, ZIS QDs, and commercial P25, respectively, indicating its substantial potential as a non-toxic and stable photocatalyst. Further characterizations indicated a significant enhancement in the production of photoinduced charges, along with a directional electron transfer from IOT to ZIS. Moreover, increased generation of oxidative species resulting from the oxygen reduction process was observed in the composite compared to IOT. Electrochemical analyses and theoretical calculations corroborated the accelerated oxygen reduction process upon the addition of ZIS QDs to IOT. Consequently, a Zscheme route for photoinduced charge transfer was established in the ZIS QDs-IOT composite, leading to prolonged lifetime and reduced recombination rate of photoinduced charges. This synergistic effect preserved the highly oxidative and reductive abilities of both semiconductors, ultimately resulting in remarkable photo- catalytic activity.
- 卷号：689
- 期号：
- 是否译文：否
- 上一条：Design and Preparation of ZnIn<sub>2</sub>S<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> Z-Scheme Heterojunction for Enhanced Photocatalytic CO<sub>2</sub> Reduction
- 下一条：Theoretical insights into tunable photocatalytic water splitting performance of black phosphorus quantum dots through doping different nonmetallic heteroatoms