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Preparation of ZnO Photocatalyst for the Efficient and Rapid Photocatalytic Degradation of Azo Dyes

Nanoscale research letters, 2017-02, Vol.12 (1), p.143-143, Article 143 [Peer Reviewed Journal]

The Author(s). 2017 ;Nanoscale Research Letters is a copyright of Springer, 2017. ;ISSN: 1931-7573 ;EISSN: 1556-276X ;DOI: 10.1186/s11671-017-1904-4 ;PMID: 28235375

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  • Title:
    Preparation of ZnO Photocatalyst for the Efficient and Rapid Photocatalytic Degradation of Azo Dyes
  • Author: Chen, Xiaoqing ; Wu, Zhansheng ; Liu, Dandan ; Gao, Zhenzhen
  • Subjects: Chemistry and Materials Science ; Materials Science ; Molecular Medicine ; Nano Express ; Nanochemistry ; Nanoscale Science and Technology ; Nanotechnology ; Nanotechnology and Microengineering
  • Is Part Of: Nanoscale research letters, 2017-02, Vol.12 (1), p.143-143, Article 143
  • Description: Zinc oxide (ZnO) photocatalysts were synthesized by sol–gel method using zinc acetate as precursor for degradation of azo dyes under UV irradiation. The resultant samples were characterized by different techniques, such as XRD, SEM, and EDX. The influence of preparation conditions such as calcination temperature and composite ratio on the degradation of methyl orange (MO) was investigated. ZnO prepared with a composite ratio of 4:1 and calcination temperature of 400 °C exhibited 99.70% removal rate for MO. The effect of operation parameters on the degradation was also studied. Results showed that the removal rate of azo dyes increased with the increased dosage of catalyst and decreased initial concentration of azo dyes and the acidic condition is favorable for degradation. Furthermore, the kinetics and scavengers of the reactive species during the degradation were also investigated. It was found that the degradation of azo dyes fitted the first-order kinetics and superoxide ions were the main species. The proposed photocatalyst can efficiently and rapidly degrade azo dyes; thus, this economical and environment-friendly photocatalyst can be applied to the treatment of wastewater contaminated with synthetic dyes.
  • Publisher: New York: Springer US
  • Language: English
  • Identifier: ISSN: 1931-7573
    EISSN: 1556-276X
    DOI: 10.1186/s11671-017-1904-4
    PMID: 28235375
  • Source: GFMER Free Medical Journals
    PubMed Central
    Alma/SFX Local Collection
    Springer Nature OA/Free Journals
    ProQuest Central
    DOAJ Directory of Open Access Journals

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