Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole

Ding, Chao; Fu, Kun; Pan, Yishuai; Liu, Jia; Deng, Huiping; Shi, Jun

doi:10.3390/catal10091097

Open AccessArticle

Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole

by

Chao Ding

,

Kun Fu

,

Yishuai Pan

,

Jia Liu

,

Huiping Deng

^* and

Jun Shi

^*

Shanghai Institute of Pollution Control and Ecological Security, Key Laboratory of Yangtze River Water Environment Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

^*

Authors to whom correspondence should be addressed.

Catalysts 2020, 10(9), 1097; https://doi.org/10.3390/catal10091097

Submission received: 10 August 2020 / Revised: 7 September 2020 / Accepted: 13 September 2020 / Published: 22 September 2020

(This article belongs to the Special Issue Novel Photocatalysts for Decomposition of Organic and Inorganic Pollutants)

Download

Browse Figures

Versions Notes

Abstract

Ag and AgI-modified ZnO composites (Ag/ZnO and AgI/ZnO) were synthesized in facile ways. The photocatalysts were used for the photodegradation of metronidazole (MNZ) under the irradiation of simulated sunlight. The results of experiments showed that both Ag/ZnO and AgI/ZnO had a specific molar ratio to reach the best performance. Ag/ZnO performed better in the photodegradation of MNZ than AgI/ZnO under the same conditions. The reaction rate constant of AgI/ZnO was less affected by the variation of initial concentration of MNZ or pH values. The main reactive oxygen species of the photocatalytic process are OH, O₂⁻ and h⁺, but the free radicals which play the most critical part differ in Ag/ZnO and AgI/ZnO. Several intermediates were revealed by LC–MS/MS analysis. The stability of the photocatalysts was evaluated by a series of repeated MNZ photodegradation experiments. The results showed that AgI/ZnO had better stability than Ag/ZnO.

Keywords: Ag/ZnO and AgI/ZnO; composite photocatalysts; metronidazole; reactive oxygen species

Share and Cite

MDPI and ACS Style

Ding, C.; Fu, K.; Pan, Y.; Liu, J.; Deng, H.; Shi, J. Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole. Catalysts 2020, 10, 1097. https://doi.org/10.3390/catal10091097

AMA Style

Ding C, Fu K, Pan Y, Liu J, Deng H, Shi J. Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole. Catalysts. 2020; 10(9):1097. https://doi.org/10.3390/catal10091097

Chicago/Turabian Style

Ding, Chao, Kun Fu, Yishuai Pan, Jia Liu, Huiping Deng, and Jun Shi. 2020. "Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole" Catalysts 10, no. 9: 1097. https://doi.org/10.3390/catal10091097

APA Style

Ding, C., Fu, K., Pan, Y., Liu, J., Deng, H., & Shi, J. (2020). Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole. Catalysts, 10(9), 1097. https://doi.org/10.3390/catal10091097

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI