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- 2019
凹凸棒/Bi2WO6光催化复合材料的制备及性能
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Abstract:
由于Bi2WO6半导体具有无毒、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，Bi2WO6具有比表面小和吸附能力差的缺点限制了其实际应用。利用凹凸棒黏土的强吸附性，通过调节水热反应温度和时间、凹凸棒黏土与Bi2WO6的质量比及前驱体溶液的pH值等条件制备凹凸棒/Bi2WO6光催化复合材料，并对其进行XRD、SEM、N2吸附-解吸和紫外-可见漫反射光谱（UV-vis DRS）等表征测试。研究表明，在180℃水热反应18 h、凹凸棒黏土与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。 The 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. The 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, N2 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 is prepared under hydrothermal reaction at 180℃ for 18 h, the mass ratio of attapulgite clay to Bi2WO6 is 6%, and the initial pH=1 for the precursor solution of attapulgite/Bi2WO6 photocatalytic composite. 山西省高等学校科技创新研究项目（163140105-S
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