Ag+/Ag/ZnO 多孔纳米结构纤维材料的制备及可见光催化性能

摘要

Ag+ / Ag / ZnO porous nano-structured fiber materials were prepared by the template-assisted two-steps method and characterized by thermogravimetric analysis(TG), X-ray diffraction(XRD), X-ray photoe-lectron spectroscopy(XPS), scanning electron microscopy(SEM) and UV-Vis spectroscopy(UV-Vis) tech-niques. The effect of modified silver amount(molar fraction, 0-1. 5% ) on the photocatalytic property of ZnO materials was studied by the degradation of methylene blue(MB) as the model reaction. The results show that the Ag+-Ag co-modified ZnO porous nano-structured fiber materials are successfully prepared via the template-assisted two-steps method and the Ag+-Ag co-modifification affects the photocatalytic performance of ZnO mate-rials by affecting its cell structure and light adsorption property and morphology. Under the irradiation of visi-ble light, the Ag+ / Ag / ZnO porous nano-structured fiber materials showed better catalytic performance than pure ZnO and the catalytic perfrmace of Ag+ / Ag / ZnO is related to the modified amount of Ag+-Ag. In this pa-per, the way of Ag+ and Ag for improving photocatalytic performance of the ZnO materials was discussed. And the obtained results are helpful to understand the photocatalytic phenomena and mechanisms on the multi-structured material.%借助棉花纤维模板,采用两步法制备了 Ag+/ Ag/ ZnO 多孔纳米结构纤维材料,并利用 X 射线衍射(XRD)、 X 射线光电子能谱(XPS)、扫描电子显微镜(SEM)和紫外-可见光谱(UV-Vis)等对其进行了表征.以亚甲基蓝(MB)的脱色降解为模型反应,考察了银修饰量(摩尔分数,0~1.50%)对 ZnO 纳米结构纤维材料光催化性能的影响.结果表明,利用模板辅助的两步法制备了 Ag+-Ag 共修饰的 ZnO 多孔纳米结构纤维材料 Ag+/ Ag/ ZnO, Ag+和 Ag 通过改变 ZnO 的晶胞结构、光吸收特性及形貌等影响其光催化性能；在可见光条件下, Ag+/ Ag/ ZnO 的催化性能优于纯 ZnO,且与修饰量有关.