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Synthesis of Imprinted Ag-PANI/CdS/Fe3O4/BC Heterojunction Towards Selective Adsorption and Degradation of the Specific Pharmaceuticals
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Synthesis of Imprinted Ag-PANI/CdS/Fe3O4/BC Heterojunction Towards Selective Adsorption and Degradation of the Specific Pharmaceuticals
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Journal Article
Synthesis of Imprinted Ag-PANI/CdS/Fe3O4/BC Heterojunction Towards Selective Adsorption and Degradation of the Specific Pharmaceuticals
2023
Overview
Selective photodecomposition of highly toxic pollutants is a significant challenge because the free radicals produced by photocatalyst show an indistinguishable attack on all contaminants in wastewater. To realize selective photodegradation, an organic imprinted Ag-PANI/CdS/Fe3O4/Biochar photocatalyst (IM-Ag-PANI/CdS/Fe3O4/BC) was successfully prepared by photoinitiated polymerization method. The formation of heterojunction facilitates the separation of photoexcited carriers and effectively inhibits the photocorrosion of CdS, thereby improving the photocatalytic activity and stability of photocatalysts. Moreover, the imprinted cavities in Ag-PANI layer help to selectively adsorb and degrade 2-mercapto-1-methylimidazole (MMIZ), resulting in a high selectivity coefficient of 2.40 relative to 5-Mercapto-1-methyltetrazole, and the photodegradation efficiency of MMIZ is boosted up to 76% within 1 h. This work provides a new idea to construct stable photocatalysts with high selectivity for the decontamination of target pollutants.
