Huang Teng, Tian Fan, Wen Zhipan, Li Guangfang, Liang Ying, Chen Rong
School of Chemistry and Environmental Engineering, Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan, 430205, PR China.
Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, PR China.
J Hazard Mater. 2021 Feb 5;403:123661. doi: 10.1016/j.jhazmat.2020.123661. Epub 2020 Aug 14.
Bi/BiWO heterostructures has been successfully prepared by a facile one-step hydrothermal method. By maneuvering reaction time and Bi/W molar ratio of the precursors, we have been able to selectively introduce oxygen vacancy and metallic Bi into BiWO nanostructures. The obtained Bi/BiWO heterostructures with more oxygen vacancy and moderate metallic Bi exhibit significantly improved photocatalytic activity for the photodegradation of bisphenol A (BPA) and its analogues due to its great ability for the generation of singlet oxygen (O), which has proven to work as the main reactive oxygen species during photocatalysis. It is also found the O concentration is highly depended on and modulated by the content of oxygen vacancy and metallic bismuth. Besides, we also demonstrate that the obtained Bi/BiWO products display efficient photocatalytic performance toward BPA derivatives degradation and enhanced stability to resist the interferences in the water matrix.
通过一种简便的一步水热法成功制备了Bi/BiWO异质结构。通过控制前驱体的反应时间和Bi/W摩尔比，我们能够选择性地将氧空位和金属Bi引入BiWO纳米结构中。所获得的具有更多氧空位和适量金属Bi的Bi/BiWO异质结构，由于其产生单线态氧（O）的能力很强，在光催化降解双酚A（BPA）及其类似物方面表现出显著提高的光催化活性，这已被证明是光催化过程中的主要活性氧物种。还发现O浓度高度依赖于氧空位和金属铋的含量并受其调节。此外，我们还证明了所获得的Bi/BiWO产物对BPA衍生物的降解具有高效的光催化性能，并具有增强的稳定性以抵抗水基质中的干扰。
