摘要
采用溶胶-凝胶法制备陶粒负载Ni2O3和B元素共掺杂纳米TiO2可见光催化剂,以甲基橙为目标降解物,探讨了光催化氧化降解甲基橙的规律,考察了催化剂的焙烧温度、Ni元素和B元素掺杂量、催化剂投加量、甲基橙溶液初始浓度、初始pH值、反应温度等因素对甲基橙脱色效果的影响。结果表明:在600℃温度下焙烧的催化剂具有最佳光催化活性;B和Ni最佳掺杂量为3.0%;甲基橙脱色率随甲基橙初始浓度的降低、催化剂投加量的增加、反应温度的升高、初始pH值降低而增大;催化剂经重复使用后,仍具有较高的光催化性能。
Using Ni, B codoped TiO2 supported on haydite prepared by sol-gel method as visible llglat plaotocatalyst, methyl orange as degradation agent, the rules of photocatalytic oxidation degradation of methyl orange were discussed; the influences of calcination temperature of catalyst, doping content of Ni and B, dosage of catalyst, initial concentration of methyl orange solution, initial pH value, reaction temperature and some other factors on the decolorization effect were investigated. The results showed that： the catalyst calcinated at 600 ℃ had the best photocatalytic activity; the optimal doping content of B and Ni was 3.0%; the decolorization rate of methyl orange increased with the decrease of initial concentration of methyl orange solution and pH value, and the increase of catalyst dosage and reaction temperature. Besides, the catalyst still had good photocatalytic performance after being used repeatedly.
出处
《工业用水与废水》
CAS
2011年第6期63-66,74,共5页
Industrial Water & Wastewater
关键词
TIO2
陶粒
掺杂
光催化
甲基橙
TiO2
haydite
doping
photocatalysis
methyl orange
