Preparation and Enhanced Photo-/Electro-Catalytic Activities of Polypyrrole Coating [CuMo12O40]6− POM Based MOF Composite

• Published in: Journal of cluster science 2020-09, Vol.31 (5), p.1051-1059
• Main Authors: Zhang, Jingwei, Zhang, Jisheng
• Format: Article
• Language: English
• Subjects: Ammonium molybdate; Carbon; Catalysis; Chemical synthesis; Chemistry; Chemistry and Materials Science; Crystallography; Electrochemical analysis; Electrodes; Inorganic Chemistry; Methylene blue; Nanochemistry; Nanocrystals; Original Paper; Photocatalysis; Physical Chemistry; Polyoxometallates; Polypyrroles; Radiation; Single crystals
• ISSN: 1040-7278; 1572-8862
• DOI: 10.1007/s10876-019-01710-9

A new polyoxometalates (POMs) based hybrid compound with helical chains, H 4 [Cu 2 (bpe) 3 ](CuMo 12 O 40 ) (Cu 2 CuMo 12 ) (bpe = bis(4-pyridyl)ethylene), was synthesized by the reaction of Cu(NO 3 ) 2 (NH 4 ) 6 Mo 7 O 24 and bpe, and characterized by elemental analyses, IR, PXRD and X-ray single crystal diffraction, in which the Keggin-type [CuMo 12 O 40 ] 6− polyoxoanion was fabricated in suit. Moreover, to improve the photo-/electo-catalytic activities, the polypyrrole (PPy) coating Cu 2 CuMo 12 composites (Cu 2 CuMo 12 /PPy-n) have been prepared and exhibited excellent photo- and electro-catalytic activities. More specifically, the photocatalytic decomposition rate of methylene blue (MB) using the Cu 2 CuMo 12 /PPy-2 as catalyst is 93.1% under the visible light, which is much larger than that of Cu 2 CuMo 12 (13.1%). The electrochemical properties of Cu 2 CuMo 12 /PPy-2 exhibit similar redox behavior to the Cu 2 CuMo 12 , involving two-, four- and six-electron-reduced species for the reduction of nitrite.