Wang Lan, Zhou Hanghang, Zhang Hongzhong, Song Yali, Zhang Huan, Qian Xuhui
Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering , Zhengzhou University of Light Industry , Zhengzhou 450001 , China.
Inorg Chem. 2020 Feb 17;59(4):2278-2287. doi: 10.1021/acs.inorgchem.9b03007. Epub 2020 Feb 3.
It is challenging to design and prepare difunctional photocatalysts for simultaneous photocatalytic wastewater purification and hydrogen (H) energy production. In this study, a novel ternary heterostructure pholocatalyst, ZnInS@SiO@TiO (ZIS@SiO@TiO) was successfully prepared by simple sol-gel and solvothermal methods. The SiO nanospheres were used as a support to prevent the aggregation of TiO nanoparticles efficiently. The SiO@TiO nanoparticles were uniformly inserted into the 2D-layered flowerlike ZnInS to form a ternary heterostructure that can efficiently improve the separation and transportation of photoinduced electron-hole pairs. As expected, the 150%-ZIS@SiO@TiO nanocomposite exhibited an excellent rate of H production under simulated sunlight (618.3 μmol g h), which was 229 and 3.3 times higher than the binary SiO@TiO nanoparticles and pure ZnInS. Furthermore, the degradation efficiency of methylene blue reached 99.7% during the H production process. These findings provided possibilities to couple energy conversion with environmental restoration.
设计和制备用于同时进行光催化废水净化和氢能生产的双功能光催化剂具有挑战性。在本研究中，通过简单的溶胶 - 凝胶法和溶剂热法成功制备了一种新型三元异质结构光催化剂ZnInS@SiO@TiO（ZIS@SiO@TiO）。SiO纳米球用作载体，有效地防止了TiO纳米颗粒的聚集。SiO@TiO纳米颗粒均匀地插入二维层状花状ZnInS中，形成三元异质结构，可有效改善光生电子 - 空穴对的分离和传输。正如预期的那样，150%-ZIS@SiO@TiO纳米复合材料在模拟太阳光下表现出优异的产氢速率（618.3 μmol g⁻¹ h⁻¹），分别是二元SiO@TiO纳米颗粒和纯ZnInS的229倍和3.3倍。此外，在产氢过程中，亚甲基蓝的降解效率达到了99.7%。这些发现为能量转换与环境修复的耦合提供了可能性。
