摘要
[目的]采用溶胶-凝胶方法制备了几种POMs/TiO2复合光催化剂,考察了催化剂在紫外光照射下对模拟染料废水(酸性媒介黑PV溶液)的光催化降解行为,为降解有机污染物提供理论指导。[方法]研究了催化剂中的POMs含量、催化剂用量、溶液的pH及H2 O2浓度对PV溶液降解过程的影响。[结果]H4SiW12O40/TiO2复合催化剂光催化降解模拟染料废水(PV溶液)效果最佳。PV溶液初始浓度为300 mg/L时,脱色反应最佳条件:催化剂为H4SiW12O40/TiO2,α-H4SiW12O40质量分数为1.5%时,催化剂用量为60 mg、pH为2.0、H2 O2浓度为20 mmol/L时,PV降解质量分数可达到72.48%。[结论]POMs/TiO2复合催化剂较纯TiO2光催化降解PV溶液活性明显,其光催化降解有机污染物意义重大。
[Objective] The aim is to investigate photocatalytic degradation of dye waste water（Acid Mordant Black PV solution） under UV light irradiation using the composite of POMs/TiO2 as catalyst prepared by sel-gel method.The study can provide the theoretical guidance for degradation of organic pollutants.[Method] The degradation of PV is affected by content of POMs in catalyst,amount of catalyst,pH,concentration of H2O2 solution.[Result] The catalyst of H4SiW12O40/TiO2 has the best efficiency to the photocatalytic degradation of dye wastewater（PV solution）.In 300 mg/L RRN solution,the optimum reaction condition is as follows.The amount of catalyst H4SiW12O40/TiO2（α-H4SiW12O40 content： 1.5%） is 60 mg,pH= 2.0,20 mmol/L H2O2 solution.Under the above condition,the percentage of degradation for PV comes up to 72.48%.[Conclusion ] The photocatalytic activity of POMs/TiO2 catalyst is higher than that of TiO2.Photocatalytic degradation of organic pollutions by POMs/TiO2 catalyst has great significance.
出处
《安徽农业科学》
CAS
北大核心
2011年第31期19305-19306,19357,共3页
Journal of Anhui Agricultural Sciences
基金
吉林省教育厅资助项目(2009304)
关键词
多金属氧酸盐
二氧化钛
光催化降解
有机污染物
Polyoxometalates
Titanium dioxide
Photocatalytic degradation
Organic pollutants
