摘要
以天然牛角瓜纤维的碳化中空纤维(CF)为载体,通过高温水热法,以钛酸四丁酯为钛源,成功将TiO2负载在碳纤维上,制备出光催化剂TiO2/CF;并通过化学还原法,在TiO2表面进一步负载纳米Au粒子,得到高效光催化剂Au/TiO2/CF。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)对光催化剂负载前后的形貌进行观察比较,同时利用紫外可见漫反射光谱对光催化剂进行光谱表征。研究发现,在TiO2/CF表面负载纳米Au粒子后,其禁带宽度值变小,由2.78 eV变为2.65 eV;通过对亚甲基蓝、罗丹明B、左氧氟沙星、阿昔洛韦四种目标污染物的光催化降解,发现纳米Au粒子的负载可显著提高Au/TiO2/CF的光催化活性。
The carbon fiber derived from natural Calotropisgigantea fiber is used as the carrier,and the photocatalyst TiO2/CF is prepared by loading TiO2 on carbon fiber by high temperature hydrothermal method with tetrabutyltitanate as titanium source.On the basis of chemical reduction method,nano-Au particles are loaded on the surface of TiO2 to obtain a highly efficient photocatalyst Au/TiO2/CF.The mor?phologies of the photocatalyst before and after Au loading are observed by scanning electron microsco?py(SEM)and transmission electron microscopy(TEM).The photocatalyst is characterized by UV-visible diffuse reflectance spectroscopy(UV-Vis-DRS).It is found that the band gap becomes smaller after loading nano-Au particles on the surface of TiO2/CF,from 2.78 eV to 2.65 eV.Furthermore,four target pollutants,methylene blue,rhodamine B,levofloxacin and acyclovir are used to investigate the catalytic activity.The result shows that the loading of nano-Au particles significantly improves the photocatalytic activity.The good degradation effect of photocatalyst Au/TiO2/CF on various dyes and antibiotics indi?cates that it has broad application prospects in water purification.
作者
王菊
高爱芹
谢孔良
侯爱芹
WANG Ju;GAO Ai-qin;XIE Kong-liang;HOU Ai-qin(College of Chemistry,Chemical Engineering and Biotechnology,Donghua University,Shanghai 201620,China;National Engineering Research Center for Dyeing and Finishing of Textiles,Shanghai 201620,China)
出处
《印染》
北大核心
2019年第22期6-11,共6页
China Dyeing and Finishing
基金
中国博士后科学基金(2019M651327)
中央高校基本科研业务专项资金资助(2232019D-3-19)
关键词
废水处理
光催化剂
化学还原法
贵金属沉积
等离子共振效应
有机化合物
牛角瓜纤维
wastewater treatment
photocatalyst
chemical reduction
precious metal deposition
sur?face plasmon resonance(SPR)
organic compound
calotropisgigantea fiber
