Zhang Ying, Su Anhui, Ding Yuqin, Wu Yuhan, Tan Yapeng, Chang Jianguo
Anhui Provincial Key Laboratory of Green Carbon Chemistry, School of Chemistry and Material Engineering, Fuyang Normal University, Fuyang 236037, China.
Molecules. 2025 Sep 7;30(17):3644. doi: 10.3390/molecules30173644.
TiO photocatalysts exhibit great potential in solar fuel production and environmental remediation, yet their practical applications are often hindered by high electron-hole recombination rates. This study presents a novel strategy for fabricating hollow anatase TiO-modified ZnS heterostructures (TiO/ZnS) via a simple hydrothermal method. The heterostructure effectively combines the high electron mobility of ZnS, which facilitates rapid photogenerated electron transfer, with the high specific surface area of hollow TiO which enhances pollutant adsorption. As a result, TiO/ZnS demonstrates superior tetracycline degradation efficiency due to optimized charge separation and improved accessibility to reactive sites, compared to pristine TiO and ZnS. Furthermore, the enhanced photocatalytic activity is attributed to efficient charge separation facilitated by Type-II heterojunctions between ZnS and anatase TiO. Cycling tests reveal that TiO/ZnS retains over 94% of its activity after 5 cycles. This work offers a versatile approach for stabilizing metal oxides through heterostructure engineering, with significant implications for scalable environmental catalysis.
二氧化钛光催化剂在太阳能燃料生产和环境修复方面展现出巨大潜力，但其实际应用常常受到高电子-空穴复合率的阻碍。本研究提出了一种通过简单水热法制备中空锐钛矿型二氧化钛改性硫化锌异质结构（TiO/ZnS）的新策略。这种异质结构有效地将硫化锌的高电子迁移率（有利于光生电子的快速转移）与中空二氧化钛的高比表面积（增强污染物吸附）结合起来。结果表明，与原始的二氧化钛和硫化锌相比，TiO/ZnS由于电荷分离得到优化且活性位点的可及性提高，展现出卓越的四环素降解效率。此外，增强的光催化活性归因于硫化锌和锐钛矿型二氧化钛之间的II型异质结促进了有效的电荷分离。循环测试表明，TiO/ZnS在5次循环后仍保留超过94%的活性。这项工作为通过异质结构工程稳定金属氧化物提供了一种通用方法，对可扩展的环境催化具有重要意义。
