[Spectrum study of organochlorine pesticides after nano TiO2 photocatalytic degradation in AgNO3 medium].
A study on a nano anatase TiO2 production from the hydrolysis of TiCl4 was presented. In the nano TiO2 suspending medium, the photocatalytic behaviors for some organochlorine pesticides including alpha, beta, gamma, delta-BHC, DDT, dieldrin, dicofol and agroceres were compared and studied under UV irradiation in the air. Owing to structural difference of C--Cl in the molecule, the degradation efficiencies for the organochlorine pesticides presented an obvious difference with the order of dicofol>dieldrin> DDT>agroceres and alpha-BHC>gamma-BHC>delta-BHC>beta-BHC. Accordingly, the nano TiO2 material was applied as a photocatalyzer, which catalyzed transformation of organochlorine pesticide to chlorine ion. Nanoparticle of silver chloride with a maximal absorbance at the wavelength of 260 nm were prepared in the surfactant polyvinyl alcohol solution. Organochlorine pesticides could be determined according to the concentration of silver chloride.
Li
Mei-jin
MJ
Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, China.
Qiu
Bin
B
Guo
Guang-mei
GM
Liu
Mei-hua
MH
Chen
Xi
X
D002384:Catalysis; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry*; D049329:Nanostructures; D010575:Pesticides / Q000737:chemistry*; D010777:Photochemistry; D012835:Silver Nitrate; D014025:Titanium
D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; C009495:titanium dioxide; D012835:Silver Nitrate; D014025:Titanium