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利用含铬(Ⅵ)废水制备高效铬酸银/凹凸棒石复合光催化剂
作者:    郑英丽 吴峰敏 卢伟伟 
单位:河南科技大学化工与制药学院 河南 洛阳 471023 
关键词:原位沉淀法 铬酸银 凹凸棒石 光催化 
分类号:O643.36
出版年,卷(期):页码:2017,45(11):0-0
DOI:10.14062/j.issn.0454-5648.2017.11.19
摘要:

 利用含铬(Cr) (VI)废水,采用原位沉淀法制备高效铬酸银(Ag2CrO4)/凹凸棒石(ATP)复合光催化剂,通过X 射线衍射、

扫描电子显微镜、透射电子显微镜、X 射线光电子能谱、紫外可见漫反射光谱、荧光光谱等对其结构和性能进行表征,并以
罗丹明B 为降解底物,考察其光催化性能。结果表明:加入的凹凸棒石有效控制了Ag2CrO4 粒子的生长,使其粒径变小;所
得复合光催化剂中Ag2CrO4 的粒子直径约为15 nm,且沉积在凹凸棒石表面;和纯的Ag2CrO4 相比,Ag2CrO4/ATP 复合光催
化剂的光催化性能和稳定性有较大提高,复合催化剂的光生电子–空穴对可实现高效分离和快速传输。
Silver chromate (Ag2CrO4)/attapulgite (ATP) nanocomposite photocatalyst was synthesized by an in-situ precipitation
method with wastewater containing Cr (VI). The crystal structure, morphology and optical properties of the samples were
characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy,
UV–Vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy, respectively. The photocatalytic activities were
evaluated by degrading Rhodamine B (RhB). The results indicate that Ag2CrO4 nanoparticles with the average diameter size of 15 nm
were loaded on the surface of attapulgite. The Ag2CrO4/ATP nanocomposite exhibits an excellent visible-light photocatalytic activity
for degradation of RhB. The employment of attapulgite affects the growth of Ag2CrO4 particles efficiently, favoring the efficient
separation and rapid transfer of photo-generated electrons and holes.
基金项目:
国家自然科学基金(No. 21673067)
作者简介:
罗 洁(1980—),女,硕士,讲师
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