凹凸棒/Bi2WO6光催化复合材料的制备及其性能

《复合材料学报》优先在线发表论文。

摘  要：Bi2WO6半导体由于具有无毒、强氧化性、强可见光响应等特点，呈现出优异的光催化活性。然而，其比表面小，吸附能力差的缺点限制了其实际应用。利用凹凸棒粘土的强吸附性，通过调节水热反应温度和时间、质量比以及前驱体溶液的pH等条件制备凹凸棒/Bi2WO6光催化复合材料，并对其进行XRD、SEM、氮气吸附-解吸测定和紫外-可见漫反射光谱（UV-vis DRS）等表征测试。研究表明，在180°C水热反应18 h、凹凸棒粘土与Bi2WO6的质量比为6%、凹凸棒/Bi2WO6光催化复合材料前驱体溶液的初始pH=1时，凹凸棒/Bi2WO6光催化复合材料具有3D纳米球状分层结构，且在可见光下对罗丹明B具有较好的光催化性能。

关键词：Bi2WO6；凹凸棒粘土；复合材料；水热反应；光催化

Abstract: Bi2WO6 semiconductor possesses excellent photocatalytic performance due to its nontoxicity, strong oxidizing power and visible-light responsiveness. However, the small specific surface area and poor adsorption capacity limit its practical applications. Taking advantage of strong adsorption abilities of attapulgite clay to prepare attapulgite/Bi2WO6 photocatalytic composite by adjusting the temperature and time of hydrothermal reaction, the mass ratio, and the pH value of the precursor solution. The as-prepared photocatalyst was characterized by XRD, SEM, nitrogen adsorption-desorption measurements and UV–visible diffused reflectance spectra (UV-vis DRS). The results show that the attapulgite/Bi2WO6 photocatalytic composite has 3D nanospheres hierarchical structure and exhibit a better photocatalytic activity for Rhodamine B under visible light while it was prepared under hydrothermal reaction at 180 °C for 18 h, the mass ratio of attapulgite clay to Bi2WO6 is 6%, and the initial pH of the precursor solution of attapulgite/Bi2WO6 photocatalytic composite is 1 condition.

Keywords: Bi2WO6; attapulgite clay; composite; hydrothermal reaction; photocatalytic

作者：崔家民等，太原理工大学 环境科学与工程学院，太原

通讯作者：张卫珂，太原理工大学 环境科学与工程学院，太原

全文详见中国知网学术期刊优先数字出版。