Performance and mechanism of tetracycline degradation by sunlight/NiFe-Bi-XY heterojunctions /permonosulfate system 太阳光/NiFe-Bi-XY 异质结催化剂/过一硫酸盐体系对四环素的降解性能及机理

Chen，Kexin1; Wang，Chao1; Hu，Qing1,2; Wang，Yuhan1,2

2022-08-01

10.12030/j.cjee.202204023

环境工程学报   Impact Factor & Quartile

1673-9108

In recent years, spinel-type ferrites have promising application prospects in the field of photocatalysis. However, its agglomeration will affect the catalytic effect, and the construction of a heterojunction structure can effectively improve the catalytic efficiency. In this study, a series of BiWO/NiFeO p-n type heterojunctions (NiFe-Bi-XY) by self-assemble were prepared and used to remove tetracycline in water. In the sunlight/NiFe-Bi-73/permonosulfate (PMS) systems, yhe optimal removal efficiency towards 20 mg·L tetracycline could reach 91.1% at 30 min, and the mineralization rate was 56.3%. The constructed reaction system still maintained a good removal effect of tetracycline in an alkaline environment. For NiFe-Bi-XY, the formation of p-n type heterojunctions was proved by XPS valence band spectra, Kubelka-Munk plots, Mott-Schottky test and ESR measurements. In this system, the degradation of tetracycline was mainly achieved by photocatalytic and non-photocatalytic pathways. Radical trapping experiments confirmed that ·O and O radicals were the most critical active species during the catalytic process. This study provides a feasible approach to synthesize efficient binary heterojunction catalysts for environmental remediation.

heterojunction peroxymonosulfate photocatalysis tetracycline wastewater treatment

Chinese

First ; Corresponding

2-s2.0-85138043191

Scopus

1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Environmental Science and Engineering,Engineering Technology Innovation Center (Beijing),Beijing,100083,China

Chen，Kexin,Wang，Chao,Hu，Qing,等. Performance and mechanism of tetracycline degradation by sunlight/NiFe-Bi-XY heterojunctions /permonosulfate system 太阳光/NiFe-Bi-XY 异质结催化剂/过一硫酸盐体系对四环素的降解性能及机理[J]. 环境工程学报,2022,16(8):2510-2526.

Chen，Kexin,Wang，Chao,Hu，Qing,&Wang，Yuhan.(2022).Performance and mechanism of tetracycline degradation by sunlight/NiFe-Bi-XY heterojunctions /permonosulfate system 太阳光/NiFe-Bi-XY 异质结催化剂/过一硫酸盐体系对四环素的降解性能及机理.环境工程学报,16(8),2510-2526.

Chen，Kexin,et al."Performance and mechanism of tetracycline degradation by sunlight/NiFe-Bi-XY heterojunctions /permonosulfate system 太阳光/NiFe-Bi-XY 异质结催化剂/过一硫酸盐体系对四环素的降解性能及机理".环境工程学报 16.8(2022):2510-2526.