环境友好型溴虫腈纳米农药的制备及其光降解活性  

Preparation and Photo Degradation Activity of Environmental Friendly Nano-pesticide for Chlorfenapyr

作　　者：周文祥 陈灵谦[2] 

机构地区：[1]湖南国发精细化工科技有限公司,湖南岳阳410083 [2]湘潭大学化学学院,湖南湘潭411105

出　　处：《广东化工》2007年第6期108-111,共4页Guangdong Chemical Industry

摘　　要：采用硬脂酸对纳米Ag/TiO2颗粒表面进行亲脂性改性,将溴虫腈原药、改性后的Ag/TiO2和适当的添加剂经高速剪切制成颗粒分布均匀、平均粒径约为100 nm的纳米农药制剂。光降解实验表明,该制剂在黑暗15 d内,分解率低于0.5%,而在室内(不受太阳光直射)放置15 d时,溴虫腈纳米制剂分解率达到12.3%,在太阳光直射下放置3 d的分解率为67.5%,紫外光照22.5 h时,纳米制剂分解率是常规制剂的7.9倍。纳米溴虫腈制剂有较高的光降解活性。Ag/TiO2 was modified by stearic acid to change its surface property from hydrophilic to hydrophobic. Chlorfenapyr, modified Ag/TiO2 and proper additives were mixed to fabricate a nano-pesticide formulation. The average diameter of the particles was about 100 nm. The photo degradation experiment of chlorfenapyr nano-pesticide formulation proved that the formulation was stable in darkness, while the decomposition rate was 12.3% with in lighted room after 15 days, and 67.5 % with irradiation under sunlight after 3 days. With irradiation by UV-light for 22.5 h, the decomposition rate of nano-formulation was more than 7.9 times than that of normal formulation, which indicated that the nano-formulation performances higher photo degradation activity.

关 键 词：溴虫腈 纳米农药 光降解 AG/TIO2 

分 类 号：TQ450.7[化学工程—农药化工]