摘要
以水溶性壳聚糖(WSC)为添加剂、五水硝酸铒为铒源,采用本课题组研发的浸渍/旋转法在石英玻璃片上制备一系列Er-TiO_2多孔薄膜,考察涂膜层数(1~4)、煅烧温度(550~650℃)、煅烧时间(0.5~3 h)以及WSC含量(0~0.05%(质量分数))对薄膜结构及性质的影响,并利用XRD、SEM、EDX、TG-DTG和BET等技术对薄膜的结构进行表征,通过甲基橙溶液的光催化降解反应评价其光催化性能。结果表明:当溶胶中WSC的添加量为0.04%(质量分数),涂膜层数为3层,煅烧温度为550℃,煅烧时间为1 h时,在模拟可见光下,薄膜对7.8 mg/L的甲基橙溶液光催化反应进行6 h,催化降解率可达到64.6%。
The porous Er-TiO_2 films were prepared using water-soluble chitosan(WSC) as addictive,Er(NO_3)_3·5H_2O as source of Er element we created by dip/spin-coating method.The effects of the preparation parameters,including the number of coating layers(1-4),calcination temperature(550-650 ℃),calcination time(0.5-3 h) and the content of WSC in sol(0-0.05%(mass fraction)) on the structure and performance of the films were investigated.The films were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),thermal analysis(TG-DTG) and nitrogen adsorption method(BET).The photocatalytic degradation reaction of methyl orange was chosen to evaluate the photocatalytic performance.The results show that the highest quality film is obtained by sol with 0.04%(mass fraction) of WSC,3 layers,the calcination temperature of 550 ℃,and calcination time of 1 h.With this film,the degradation rate of 7.8 mg/L methyl orange solution reaches up to 64.6% under simulated solar light after 6h photocatalytic reaction.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2017年第8期1621-1631,共10页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(21201130)~~
关键词
水溶性壳聚糖
铒掺杂
二氧化钛薄膜
光催化
模拟可见光
water-soluble chitosan
erbium-doped
titanium dioxide film
photocatalysis
simulated solar light
