Facile construction of reduced graphene oxide supported three-dimensional polyaniline/WO2.72 nanobelt-flower as a full solar spectrum light response catalyst for efficient photocatalytic conversion of bromate. (May 2019)

• Record Type: Journal Article
• Authors: Zhao, Xuesong; You, Yingying; Huang, Shaobin; Cheng, Fangqin; Chen, Pengfei; Li, Han; Zhang, Yongqing
• Is Part Of: Chemosphere. Volume 222(2019)
• Page Start: 781
• Page End: 788
• Publication Date: 2019-05
• Subjects: Reduced graphene oxide -- Polyaniline -- Tungsten oxide -- Bromate -- Full solar spectrum light driven; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2019.02.001
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: As a carcinogenic byproduct in drinking water treatment, bromate has raised global concerns on environmental and health hazard, calling for effective treatments. In the current work, a novel reduced graphene oxide supported polyaniline/WO2.72 nanobelt-flower (RGO/PANI/WO2.72 ) ternary composite was prepared through a solvent volatilization method for photocatalytic reduction of bromate. The prepared sample was characterized, and the influence of aqueous pH, ions and dissolved oxygen on the bromate reduction was explored. As expected, the introduction of RGO and PANI on the WO2.72 exhibited great synergistic effects on the separation of photogenerated carriers. The calculated reduction rate constant of RGO/PANI/WO2.72 was about six times as high as that of pure WO2.72 . Specially, the prepared photocatalyst possessed strong optical absorption in a broad range of 250–2500 nm, and thus displaying excellent catalytic performance in utilization of all solar spectrum energy. Moreover, the RGO/PANI/WO2.72 exhibited stable photocatalytic activity in cycling test. Considered holistically, the present study offered a valuable approach for rational construction of heterogeneous structure in the development of bromate-catalyzed reduction. Graphical abstract: Image 1 Highlights: The RGO/PANI/WO2.72 ternary composite was prepared via facile solvent volatilization method. Full spectrum of light energy could be utilized by RGO/PANI/WO2.72 for BrO3 − conversion. Photocatalytic performance of RGO/PANI/WO2.72 for BrO3 − conversion was systematically evaluated. Mechanism of improvement on BrO3 − conversion through RGO/PANI/WO2.72 is proposed.