Tang Yanting, Huang Jielin, Liu Shuaifei, Xiang Dandan, Ma Xinqi, Yu Xin, Li Mingxue, Guo Quanhui
Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
J Colloid Interface Sci. 2021 Aug 15;596:468-478. doi: 10.1016/j.jcis.2021.03.118. Epub 2021 Mar 24.
Mesocrystals are types of fascinating multifunctional materials in fabricating rapid charge transport pathways, and surface engineering could be considered as a significant influencing factor in boosting charge separation for efficient photocatalytic application. In this work, surface engineered TaO mesocrystals were synthesized by facile alkali treatment strategy for enhanced visible light photocatalytic tetracycline degradation. The highly enhanced photocatalytic activity could be attributed to the highly increased surface areas and surface hydroxyl groups to compare with those of commercial TaO and pristine TaO mesocrystals, which could provide more surface reactive sites and high electron density center for trapping photo-generated holes. Besides, possible tetracycline transformation pathways over surface engineered TaO mesocrystals and visible light photocatalytic mechanism were also proposed in this work. Current work also provides a facile strategy for regulating surface property of ultrawide bandgaps semiconductors for enhanced visible light photocatalytic performance.
介晶是用于构建快速电荷传输途径的一类迷人的多功能材料，表面工程可被视为促进电荷分离以实现高效光催化应用的一个重要影响因素。在这项工作中，通过简便的碱处理策略合成了表面工程化的TaO介晶，用于增强可见光光催化降解四环素。与商用TaO和原始TaO介晶相比，高度增强的光催化活性可归因于表面积和表面羟基的大幅增加，这可为捕获光生空穴提供更多的表面反应位点和高电子密度中心。此外，这项工作还提出了表面工程化TaO介晶上可能的四环素转化途径和可见光光催化机理。目前的工作还提供了一种简便的策略，用于调节超宽带隙半导体的表面性质以增强可见光光催化性能。
