Porous hollow Ag/Ag2S/Ag3PO4 nanocomposites as highly efficient heterojunction photocatalysts for the removal of antibiotics under simulated sunlight irradiation

被引：56

作者：

Alshamsi, Hassan Abbas ^{[1
]}

Beshkar, Farshad ^{[2
]}

Amiri, Omid ^{[3
,4
]}

Salavati-Niasari, Masoud ^{[2
]}

机构：

[1] Univ Al Qadisiyah, Coll Educ, Dept Chem, Diwaniya 1753, Iraq

[2] Univ Kashan, Inst Nano Sci & Nano Technol, POB 87317-51167, Kashan, Iran

[3] Univ Raparin, Coll Sci, Dept Chem, Rania, Kurdistan Regio, Iraq

[4] Int Univ Erbil, Coll Sci, Dept Chem, Erbil, Iraq

来源：

CHEMOSPHERE | 2021年 / 274卷

基金：

美国国家科学基金会;

关键词：

Heterostructure; Co-precipitation; Photocatalytic degradation; Tetracycline; Radical scavenging; AZO-DYE POLLUTANTS; INDOOR WEAK LIGHT; AG3PO4; NANOPARTICLES; FLOWER-LIKE; DRIVEN PHOTOCATALYST; ASSISTED SYNTHESIS; DEGRADATION; COMPOSITE; PERFORMANCE; MECHANISM;

D O I：

10.1016/j.chemosphere.2021.129765

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Antibiotic pollutants are a serious and growing threat to human health and the environment that efficient measures must be taken to eliminate them. Here, we report the facile fabrication of porous hollow Ag/ Ag2S/Ag3PO4 heterostrucutres for efficient photocatalytic degradation of tetracycline under simulated sunlight irradiation. The morphology manipulation and hetero-nanocomposites construction through a coprecipitation-refluxing approach were applied to enhance the photocatalytic performance of the Ag/Ag2S/Ag3PO4 products. The photodegradation outcomes indicated that the heterojunction Ag/Ag2S/Ag3PO4 photocatalyst with a suitable band gap energy of 2.17 eV, has better degradation performance (similar to 95%) than individual Ag2S and Ag3PO4 structures after 120 min of simulated sunlight irradiation, even after five recycles. The good photocatalytic activity of Ag/Ag2S/Ag3PO4 nanocomposites could be mainly attributed to the unique hierarchical architectures, promoted visible-light harvesting, reduced a recombination and boosted separation of electron-hole pairs originated from the as-formed hetero-junctions. Moreover, we proposed a photocatalytic degradation mechanism based on the radical scavenging results, which disclosed that the center dot O-2(-) and center dot OH species perform essential tasks for the photodegradation of antibiotics by Ag/Ag2S/Ag3PO4 nanocomposites. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：12

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