【摘要】 以P 25纳米TiO2 作为光催化剂,在环状光催化反应器中进行了苯酚水溶液的光催化降解性能研究。系统考察了溶液的pH、P 25用量、银掺杂量、苯酚的初始质量浓度等因子对苯酚溶液光催化降解过程的影响。结果表明,在pH=7时,苯酚水溶液降解率达97 4%,强酸和强碱条件均不利于苯酚的降解;质量浓度50mg/L的苯酚水溶液,P 25用量为50mg,UV辐照30min时降解率为95 6%;质量浓度100mg/L的苯酚水溶液,P 25用量为150mg,UV辐照60min时降解率为95 4%;银掺杂P 25增加了其光催化活性,用质量分数为10%的硝酸银水溶液掺杂制备的复合光催化剂,苯酚的降解率比未掺杂时增加16 5%。更多还原

【Abstract】 Photocatalytic degradation of phenol solution by P-25 titanium dioxide was carried out in an annular photoreactor.Some important factors,such as pH,quantity of P-25 and Ag-dopping,and initial mass concentration of phenol,were investigated systematically.Experimental results show that the high degradation rate 97.4% can be reached when pH is about 7 and quantities of photocatalyst P-25 are 50 mg and 150 mg if mass concentrations of phenol solution are 50 mg/L and 100 mg/L respectively.Ag-dopping can improve the photocatalytic activity of P-25 that the degradation rate of phenol solution increases by 16.5% when the photocatalyst is modified with AgNO₃ solution （w=10%）.更多还原