中文摘要：

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．

英文摘要：

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） techniques. 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 templateassisted two-steps method and the Ag＋-Ag co-modifification affects the photocatalytic performance of ZnO materials by affecting its cell structure and light adsorption property and morphology. Under the irradiation of visible 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 paper, 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 multistructured material.