Piezoelectric catalytic, photocatalytic and adsorption capability and selectivity removal of various dyes and mixed dye wastewater by ZnO nanoparticles
Affiliations: [a] School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing, Wanzhou, China
| [b] Chongqing Key Laboratory of Geological Environment Monitoring and Disaster Early-Warning in Three Gorges Reservoir Area, Chongqing Three Gorges University, Chongqing, Wanzhou, China
| [c] State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, China
| [d] Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Sichuan, Mianyang, China
| [e] Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang, China
Correspondence:
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Corresponding authors: Shifa Wang, Chongqing Key Laboratory of Geological Environment Monitoring and Disaster Early-warning in Three Gorges Reservoir Area, Chongqing Three Gorges University, Chongqing, Wanzhou, 404000, China. E-mail: wangshifa2006@yeah.net and Leiming Fang, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Sichuan, Mianyang, 621900, China. E-mail: flmyaya2008@163.com.
Abstract: The C-O functional group decorated ZnO nanoparticles with high UV absorption and VIS/NIR reflectance were synthesized by a simple wet chemistry method using various chelating agents. This study attempts to explore the internal mechanism of the piezoelectric catalytic activity, photocatalytic activity and adsorption performance of ZnO nanoparticles. The phase purity, particle size, optical band gap and photocatalytic activity of ZnO nanoparticles showed strong chelating agent - dependent behavior. The ZnO nanoparticles prepared by using EDTA as a chelating agent exhibits smallest particle size, highest photocatalytic activity for the degradation of methyl orange, methylene blue and rhodamine B, high adsorption capacity for the adsorption of Congo red and high vibration-catalytic performance for the vibration degradation of rhodamine B. The synergies mechanism among piezoelectric catalysis, photocatalysis and adsorption capacity of ZnO nanoparticles are discussed on the basis of the experimental results.
