摘要
采用溶胶凝胶法合成了掺杂Cu^(2+)和Ce^(4+)的Ti O2可见光催化剂,用活性艳红X-3B降解脱色为模型反应,结合紫外-可见光谱法、XRD和SEM等表征手段,考察了制备条件与光催化活性的关系.实验结果表明:适量掺杂稀土元素Ce^(4+)较单独掺杂Cu^(2+)能更加有效地提高催化剂在可见光下的催化活性,掺杂后使催化剂的吸收带边位置发生红移,晶型结构为锐钛矿和金红石的混合晶型.掺杂Ce^(4+)量为1.5%时,0.4 g催化剂对30 m L浓度为5 mg/L的活性艳红X-3B模拟印染废水降解率达到61.1%.
Cu, Ce-doped TiO2 photocatalysts are prepared using the sol-gel method. Its influ- ence of preparation condition and photocatalytic activity is characterized by means of UV-VIS spectrometry, XRD, SEM technique. These samples are also performed as photocatalysts in the degradation and decolorization of active brilliant red X-3 B. Experimental results show that the Ce-doped TiO2 photocatalyst performs a better photocatalytic activity than that of separate Cu- doped photocatalytic under natural light. Because both rutile phase and anatase phase are formed in Cu, Ce-doped TiO2 and the band edges show a red shift compared with Cu -doped TiO2. Cu, Ce-doped TiO2 shows the highest photocatalytic activity when mass fraction of Ce in TiO2 is 1. 5%. The decolorization rate of 5 mg/L active brilliant red X-3B reaches 61.1% when the dosage of catalyst is 13 g/L.
作者
高立新
GAO Lixin(School of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, Chin)
出处
《上海电力学院学报》
CAS
2017年第2期157-161,172,共6页
Journal of Shanghai University of Electric Power
