Yu Xin, Zhao Jingjing, Huang Jielin, Zhao Jiawei, Guo Yifan, Tang Yanting, Ma Xinqi, Li Zhonghua, Guo Quanhui, Zhao Junwei
Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China; Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, 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. 2020 Jul 15;572:141-150. doi: 10.1016/j.jcis.2020.03.030. Epub 2020 Mar 9.
Harvesting broad spectral absorption and visible light photocatalysis of ultrawide bandgap semiconductors are one of most significative topics in the solar energy conversion and utilization fields. In this work, amorphous Cl-TaO microspheres were prepared by facile solvothermal method for stabilized visible light photocatalytic hydrogen generation. The acetone absorbed on the interfaces of TaO nanoparticles induced the formation of oxygen vacancies, enhanced visible light absorption, and formation of TaO microspheres with preferred orientations as well as Cl doping. The Cl-TaO microspheres showed typical amorphous characteristics and obvious visible light absorption in comparison to those of commercial TaO. More importantly, the prepared Cl-TaO microspheres also showed stabilized visible light photocatalytic hydrogen generation performance in the spectral regions of 400 nm ≤ λ ≤ 600 nm mainly because of the introduction of oxygen vacancy defects and Cl doping, which might significantly expand the application of tantalum oxide semiconductors in the broad spectral photocatalytic water splitting.
收获超宽带隙半导体的宽光谱吸收和可见光光催化是太阳能转换和利用领域中最具意义的课题之一。在这项工作中，通过简便的溶剂热法制备了非晶态Cl-TaO微球，用于稳定的可见光光催化产氢。吸附在TaO纳米颗粒界面上的丙酮诱导了氧空位的形成，增强了可见光吸收，并形成了具有择优取向的TaO微球以及Cl掺杂。与商业TaO相比，Cl-TaO微球表现出典型的非晶态特征和明显的可见光吸收。更重要的是，所制备的Cl-TaO微球在400 nm≤λ≤600 nm光谱区域也表现出稳定的可见光光催化产氢性能，这主要归因于氧空位缺陷的引入和Cl掺杂，这可能会显著扩大氧化钽半导体在宽光谱光催化水分解中的应用。
