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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2015,Vol.31>> Issue(8)>> 1615-1620     doi: 10.3866/PKU.WHXB201505141         中文摘要
PHYSICAL CHEMISTRY OF MATERIALS
Preparation of Micro/Nano ZnO Pompons and Their Catalytic Activity for the Solar Degradation of Organic Dyes
TONG La-Ga, LIU Jin-Yan, WANG Cen-Chen, RONG Hua,LI Wei
College of Chemical Engineering, Beijing Institute of Petro-chemical Technology, Beijing 102617, P. R. China
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A novel, high-yielding synthesis of micro/nano ZnO pompons using glutamic acid fluoborate (GluBF4) ionic liquid is reported. The precursor was prepared with zinc acetatedihydrate [Zn(Ac)2·2H2O] and sodium hydroxide (molar ratio = 1:6) as starting materials in an aqueous solution of the GluBF4 ionic liquid at room temperature, which was then heated by microwave to form nano-ZnO powder. The ZnO pompons were characterized using field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), specific Brunauer-Emmett-Teller (BET) surface area method, and energy dispersive spectrometry (EDS). The product displayed a hexagonal wurtzite structure. The pompon diameter was determined to be 20.4 nm, with a pompon specific surface area of 28.3 m2·g-1. A possible mechanism for the formation of the nano-ZnO pompons is discussed. The ZnO pompons displayed high photocatalytic reactivity and photostability under sunlight. Aqueous solutions of methyl orange (MO) and methyl violet (MV) containing the ZnO pompons were exposed to sunlight and the decolorization rates were determined by monitoring the drop in color intensity. After 5 h, the solutions reached 74.3% and 96.9% degradation, respectively. The total organic carbon (TOC) content decreased as the photodegradation process occurred. The morphology, color, and weight of the ZnO pompons remained unchanged even after being reused five times.



Keywords: Amino acid ionic liquid   Microwave heating   Micro/nano ZnO   Organic contaminant   Photocatalytic degradation  
Received: 2015-02-03 Accepted: 2015-05-11 Publication Date (Web): 2015-05-14
Corresponding Authors: LI Wei Email: liwei77@bipt.edu.cn

Fund: The project was supported by the National Undergraduates Research Training Program, China (URT: 201300078) and Breeding Project of Outstanding Academic Leaders of Beijing Institute of Petro-chemical Technology, China (BIPT-BPOAL-2014).

Cite this article: TONG La-Ga, LIU Jin-Yan, WANG Cen-Chen, RONG Hua, LI Wei. Preparation of Micro/Nano ZnO Pompons and Their Catalytic Activity for the Solar Degradation of Organic Dyes[J]. Acta Phys. -Chim. Sin., 2015,31 (8): 1615-1620.    doi: 10.3866/PKU.WHXB201505141

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