A poison.:;115970-17-7Relevant articles and documents
Influence of thermal treatment and Au-loading on the growth of versatile crystal phase composition and photocatalytic activity of sodium titanate nanotubes
Grover, Inderpreet Singh,Singh, Satnam,Pal, Bonamali
, p. 51342 - 51348 (2014)
A coalescence influence of Au-loading followed by calcination at 800 °C led to a notable change in crystal-structure, morphology, phase composition and photocatalytic activity of titanate-nanostructures. After calcination at 800°C, bare sodium titanate nanotubes (TNT) having a BET surface area (SBET) of 176 m2 g-1 is transformed into sodium titanate nanorods of SBET = 21 m2 g-1, whereas calcination of Au-loaded (Au+3, Au0 and Au-nanoparticle (AuNP)) TNT at 800°C led to a variety of fragmented particles having different crystal structures, SBET (21-39 m2 g-1), shape and sizes (50-75 nm), attributed to strain induced thermal decomposition of TNT after Au-loading, and the oxidation state of Au is determined by XPS analysis. The comparative photocatalytic activity of these as-prepared catalysts to that of P25-TiO2 under UV-light were evaluated for the photooxidation of the insecticide imidacloprid which gradually degraded to various intermediate photoproducts and finally decomposed to CO2. The degradation of imidacloprid follows pseudo-first order kinetics, where 0.5 wt% Au0-deposited-TNT after calcination exhibits the highest photocatalytic activity (rate constant k = 8.9 × 10-3 min-1), which is comparatively explained on the basis of their crystal phase, surface-area, morphology and the relaxation time of photoexcited electron-hole pairs, as measured by time resolved spectroscopy. This journal is
Method for synthesizing imidacloprid at high yield
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, (2020/02/20)
The invention provides a method for synthesizing imidacloprid at a high yield. 2-chloro-5-chloromethylpyridine, ethylenediamine and cyanogen halide, which are used as raw materials, are aminated, cyclized and nitrified to synthesize the imidacloprid. The method has the advantages of high safety in the production process, good purity and high yield of the product, and easiness in industrializationrealization.
Photocatalytic degradation of imidacloprid in soil: Application of response surface methodology for the optimization of parameters
Sharma, Teena,Toor, Amrit Pal,Rajor, Anita
, p. 25059 - 25065 (2015/03/30)
The photocatalytic mineralization of imidacloprid (IMI) in soil to inorganic ions and the formation of various intermediates using TiO2 as the photocatalyst have been investigated under UV light. Various parameters, viz., catalyst concentration, soil depth and pH, intensity of light and initial concentration of IMI were optimized theoretically by using a central composite design based on a response surface methodology and were correlated with experimental results. The statistical analysis from the modelling results indicates that the degradation efficiency of IMI is affected by the depth of soil and the intensity of light, but the effects of the pH and the initial concentration of imidacloprid are more dominant. The optimum conditions obtained for the maximum degradation of imidacloprid were at pH = 3, intensity of UV light = 30 W m-2, soil depth = 0.2 cm and initial concentration of imidacloprid = 10 mg kg-1 of soil. Under these optimum conditions, the highest degradation efficiency of 83% was achieved after 18 h of UV light irradiation. The identification of various photoproduced intermediates of IMI by LC-MS analysis revealed its degradation, whereas the increase in the formation of inorganic ions with time of UV light irradiation confirms its mineralization. This journal is
