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Photocatalytic Degradation of Imidacloprid by Phosphotungstic Acid Supported on a Mesoporous Sieve MCM‐41
Author(s) -
Feng Changgen,
Li Yanzhou,
Liu Xia
Publication year - 2012
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201180453
Subject(s) - phosphotungstic acid , mesoporous material , chemistry , photocatalysis , high resolution transmission electron microscopy , molecular sieve , calcination , nuclear chemistry , catalysis , adsorption , degradation (telecommunications) , chemical engineering , transmission electron microscopy , photodegradation , specific surface area , imidacloprid , inorganic chemistry , organic chemistry , pesticide , telecommunications , agronomy , computer science , engineering , biology
Abstract Solid catalysts consisting of polyoxometalates (POM) namely phosphotungstic acid H 3 PW 12 O 40 (HPW) supported on a mesoporous sieve MCM‐41 have been prepared and characterized by FT‐IR, X‐ray diffraction, nitrogen adsorption and high resolution transmission electron microscope (HRTEM). The HPW/MCM‐41 with different HPW loadings from 10 to 60 wt% possess large specific surface area and rather uniform mesopores. Keggin structure of HPW retains on the prepared composite catalysts. The photocatalytic performance of HPW/MCM‐41 was examined by degradation of a durable pesticide imidacloprid. It is found that the prepared photocatalysts exhibit high activity under irradiation of 365 nm monochromatic light. For 50 mL of imidacloprid (10 mg/L), conversion of imidacloprid using 20 mg of HPW/MCM‐41 with 50 wt% loading level and calcined at 300°C reaches 58.0% after 5 h irradiation.