摘要
采用硝酸对粉煤灰进行酸化处理,再通过溶胶-凝胶法在酸化粉煤灰基材上负载二氧化钛,利用XRD和UV-Vis对改性二氧化钛进行表征与分析,对比了粉煤灰负载前后及纯二氧化钛对金色葡萄球菌的抑菌性能和对甲基橙的脱色能力。结果表明,光照下改性后的光催化剂具有最优抑菌性能,对金色葡萄球菌的日抑菌圈的当量直径高达15.54 mm,较纯二氧化钛抑菌圈的当量直径6.94 mm高一倍以上;在50 mL 10 mg/L的甲基橙脱色实验中,当催化剂用量为7 g、反应时间为12 h,改性催化剂对甲基橙脱色率高达98.51%,较粉煤灰提高38%。
Nitric acid has been used for the acidification treatment of fly ash. Then,TiO2 is deposited on the acidified fly ash substrate by sol-gel method and the modified TiO2 is characterized and analyzed by XRD and UV-Vis spectra. The anti-bacterial activity of aureus staphylococcus and decolorizing capacity of fly ash before and after the loading and pure TiO2 for treating methyl orange are contrasted. The results show that the modified photocatalyst under illumination has the best anti-bacterial activity. The equivalent diameter of anti-bacterial circle of aureus staphylococcus is as high as 15.54 mm ,being above one time higher than the equivalent diameter 6.94 mm of anti-bacterial circle of pure TiO/. In the experiment of 50 mL, 10 mg/L of methyl orange decolorization, when the catalyst dosage is 7 g, and reaction time 12 h, the methyl orange decolorizing rate by modified catalyst is as high as 98.51%. It is 38% higher than that of fly ash.
出处
《工业水处理》
CAS
CSCD
北大核心
2013年第12期39-41,48,共4页
Industrial Water Treatment
基金
广东省大学生创新实验项目(2010025)
关键词
粉煤灰
改性
抑菌
脱色
光催化
fly ash
modification
anti-bacterial
decolorization
photocatalysis
