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        Synthesis of PANi nanoarrays anchored on 2D BiOCl nanoplates for photodegradation of Congo Red in visible light region

        Abdolhamid Namdarian,Amin Goljanian Tabrizi,Nasser Arsalani,Alireza Khataee,Abdolkhaled Mohammadi 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.81 No.-

        Photocatalytic processes have attained considerable attention of late years, especially for environmentalremediation. Despite extensive research in this area, the need for safer, more efficient, and cost-effectiveprocesses has encouraged researchers to develop novel photocatalysis. However, the low active surfacearea and narrow bandgap limit their photocatalytic performances. In the present research, the 2D BiOClsheets were successfully synthesized by a new hydrothermal method and decorated by PANi nanoarraysthrough in-situ oxidative polymerization of aniline. The UV–vis diffuse-reflectance and photo-luminescence spectroscopy revealed the synergistic effects between PANi nanoarrays and 2D BiOClby enhancing the absorption in the visible light region and reduction of bandgap down to 2.9 eV. Furthermore, the morphology analysis showed the proper decoration of PANi nanoarrays on 2D BiOClnanoplates. The synthesized nanocomposite with different weight loadings of PANi was taken to evaluatethe decolorization efficiency of it. The result exhibited an optimum value of 88.35% at 60 min irradiationunder visible light in the photodegradation of Congo Red (CR). Moreover, the probable photocatalyticmechanism for degradation of CR by PANi/BiCOl photocatalyst was proposed based on the scavengerexperiments. The outcomes indicated that the PANi promoted the absorption intensity of the pure BiOClin the visible region. To that, the well-arranged array and considerably high specific surface area of PANicould encourage the transfer of electrons witch generated by the photo to 2D BiOCl substrate and repelthe recombination of electron-hole pairs.

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