泡沫陶瓷负载N掺杂TiO_2光降解啶酰菌胺实验研究  

Experimental study on photocatalytic degradation of boscalid using N-doped TiO_2 loaded on foam ceramic

作　　者：蔡云东 吴磊[1] 邵云[1] 王玲玉[1] 汤桂勤 

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《东南大学学报（自然科学版）》2016年第5期1027-1031,共5页Journal of Southeast University：Natural Science Edition

基　　金："十二五"国家科技支撑计划资助项目(2013BAJ10B12-02)

摘　　要：利用泡沫陶瓷为载体负载掺氮TiO_2作为环境修复材料,对水环境中啶酰菌胺进行降解,以缩短啶酰菌胺在环境中的降解周期.以尿素为氮源,钛酸四异丙酯为Ti源,采用溶胶凝胶法制备掺氮TiO_2,负载在表面积较大的泡沫陶瓷上,以300 W氙灯模拟日光光源进行了农药啶酰菌胺的光催化降解实验.考察了煅烧温度、煅烧时间、氮掺杂量、催化剂用量、p H及啶酰菌胺初始浓度对啶酰菌胺降解率的影响,并用XRD,UV-vis对掺氮TiO_2样品进行了表征.结果表明,初始浓度为5 mg/L的啶酰菌胺在投加1.0 g/L的掺氮TiO_2光催化反应3 h的降解率可达52.35%.掺氮TiO_2的制备条件为:氮掺杂量20%,煅烧温度500℃,煅烧时间4 h,此时掺氮TiO_2呈锐钛矿型.To shorten the degradation cycle of boscalid in the environment,boscalid in water environment was degradated by using nitrogen-doped TiO2 loaded on foam ceramic as the environmental remediation materials. Taking urea as nitrogen source and tetraisopropyl titanate as Ti source,nitrogen-doped TiO2 loaded on ceramic foam with lager surface area was prepared by sol-gel method,and300 W xenon lamp was used to simulate sunlight in order to study the process of photocatalytic degradation of boscalid. The effects of calcination temperature,calcination time,nitrogen doping amount,the amount of catalyst,pH and the initial concentration of boscalid on the degradation rate of boscalid were studied,and the nitrogen-doped TiO2 samples were characterized by XRD and UV-vis. The results showthat the degradation rate of boscalid with the initial concentration of 5 mg / L can reach 52. 35% after the reaction time of 3 h when the dosage of nitrogen-doped TiO2 is 1. 0g / L. The preparation conditions of nitrogen-doped TiO2 are as follows： the nitrogen doped amount is 20%,the calcination temperature is 500 ℃,the calcining time is 4 h,and then the nitrogen-doped TiO2 is anatase.

关 键 词：水环境修复 二氧化钛 光催化 氮掺杂 啶酰菌胺 

分 类 号：TQ031.7[化学工程]