无机材料学报2011，Vol.26Issue(11)：1157-1163,7.DOI:10.3724/SP.J.1077.2011.01157
水热合成Bi2WO6/ZnO异质结型光催化剂及其光催化性能
Hydrothermal Synthesis and Photocatalytic Performance of Bi2WO6/ZnO Heterojunction Photocatalysts
摘要
Abstract
A series of Bi2WO6/ZnO heterojunction photocatalysts with different Bi2WO6 concentrations (lwt%, 2wt%, 4wt%, 8wt%) were prepared by hydrothermal method at different temperatures(120°C-220°C). The prepared pure ZnO, Bi2WO6 and Bi2WO6/ZnO heterojunction photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscope (FT-IR), UV-Vis diffuse reflectance spectra, and photoluminescence (PL) spectroscope, respectively. The photocatalytic activity of the prepared catalysts was evaluated by photocatalytic degradation of acid orange Ⅱ under UV light (λ=365nm) irradiation. Results show that the photocatalytic activity of Bi2WO6/ZnO heterojunction photocatalysts is superior to that of pure ZnO and Bi2WO6. The optimal concentration of Bi2WO6 is 4wt% and the best hydrothermal temperature is 150℃. Under the above conditions, the prepared composite catalyst shows about 2.4 times in activity of the pure ZnO. The formation of Bi2WO6/ZnO heterojunction could effectively suppress the recombination of the photo generated electron and hole pairs and result in an increase in photocatalytic activity. Moreover, more surface OH groups over the Bi2WO6/ZnO heterojunction photocatalysts will further benefit the improvement of photocatalytic activity.关键词
水热法/钨酸铋/氧化锌异质结/光催化/酸性橙ⅡKey words
hydrothermal/ Bi2WO6/ZnO heterojunction/ photocatalysis/ acid orange Ⅱ分类
通用工业技术引用本文复制引用
余长林,杨凯,YUJimmyC,操芳芳,李鑫,周晓春..水热合成Bi2WO6/ZnO异质结型光催化剂及其光催化性能[J].无机材料学报,2011,26(11):1157-1163,7.基金项目
国家自然科学基金(21067004) （21067004）
江西省自然科学基金(2010GZH0048) （2010GZH0048）
江西省教育厅青年科学基金(GJJ10150) （GJJ10150）
厦门大学固体表面物理化学国家重点实验室开放基金(200906) （200906）
