首页|Improved photocatalytic performance of p-n heterostructure Ag-Ag2MoO4/polyaniline for chromium (VI) reduction and dye degradation
Improved photocatalytic performance of p-n heterostructure Ag-Ag2MoO4/polyaniline for chromium (VI) reduction and dye degradation
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NSTL
Elsevier
A novel p-n heterostructure Ag-Ag2MoO4/polyaniline (Ag-Ag2MoO4/PANI) composite was synthesized via a facile oxidation polymerization followed by co-precipitation. The surface morphology, structure, optical and photoelectrochemical properties of the as-prepared composites were determined using various techniques, and the photocatalytic activity was evaluated using chromium (VI) [Cr(VI)] and methyl orange (MO) as target inorganic and organic pollutants under visible-light irradiation. The results showed that the p-n heterostructure was formed between Ag-Ag(2)MoO(4)and PANI, which could effectively promote the rapid transfer and separation of the photogenerated electron-hole pairs. At the same time, the metallic Ag nanoparticles on the surface harvested visible-light photons and generated extra plasmonic hot electrons to enhance the photocatalytic activity. As expected, the optimal Ag-Ag2MoO4/PANI(0.10) exhibited high photo catalytic activity in the Cr(VI) reduction and MO degradation owing to the fast separation and transfer of the electron-hole pairs. Moreover, trapping experiment revealed that center dot OH and center dot O-2(-) played a vital role during the MO degradation process. Based on various characterizations and experimental results, the possible photocatalytic mechanisms were proposed. This work gave a simple method to construct p-n heterostructure photocatalysts for environmental restoration. (C) 2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier
