摘要
A series of catalysts of nanometer TiO2 were prepared by silver depositing. The photocatalytic degradation of dimethomorph in an aqueous suspensions by silver depositing with nanometer titanium dioxide as catalyst was investigated by radiation of UV-light and sunlight. A pseudo-first-order kinetic model was used to describe the results. The effects of the dosage of catalyst, oxidant, pH and radiation source on degradation were examined. The experimental results show that the decomposed rate of DMM is 94% when the dosage of catalyst is 1.25g/L and the concentration of DMM is 100mg/L under the conditions of solution pH of 7, the air flow of 1.5L/min and shining for 5h by UV-light. When it is shined by sun-light under the same condition, the decomposed rate of DMM is 48%. The mechanism of decomposition was discussed based on the data by analysis of LC-MS.
A series of catalysts of nanometer TiO_2 were prepared by silver depositing. The photocatalytic degradation of dimethomorph in an aqueous suspensions by silver depositing with nanometer titanium dioxide as ~catalyst was investigated by radiation of UV-light and sunlight. A pseudo-first-order kinetic model was used to ~describe the results. The effects of the dosage of catalyst, oxidant, pH and radiation source on degradation were ~examined. The experimental results show that the decomposed rate of DMM is 94% when the dosage of catalyst is ~1.25g/L and the concentration of DMM is ~100mg/L under the conditions of solution pH of 7, the air flow of ~1.5L/min and shining for 5h by UV-light. When it is shined by sun-light under the same condition, the decomposed rate of DMM is 48%. The mechanism of decomposition was discussed based on the data by ~analysis of LC-MS.
出处
《中国有色金属学会会刊：英文版》
CSCD
2005年第3期680-685,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(2001AA2180041)supportedbyHitechResearchandDevelopmentProgramofChina
关键词
光催化降解
纳米材料
二氧化钛
银沉积
废水治理
dimethomorph
photocatalytic degradation
nanometer TiO_2
silver deposition
