Synergistic Generation of Radicals by Formic Acid/H2O2/g-C3N4 Nanosheets for Ultra-efficient Oxidative Photodegradation of Rhodamine B

Water pollution is a global challenge endangering people's health. In this work, an ultra-efficient photodegradation system of Rhodamine B (RhB) has been established using a graphitic carbon nitride nanosheet (CNNS) as the semiconductor photocatalyst, from which energy is harvested on both the...

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Bibliographische Detailangaben
Veröffentlicht in:	Langmuir : the ACS journal of surfaces and colloids. - 1992. - 38(2022), 9 vom: 08. März, Seite 2872-2884
1. Verfasser:	Wang, Bingdi (VerfasserIn)
Weitere Verfasser:	Wang, Zhida, Bai, Chengkun, Yang, Haoqi, Sun, Hang, Lu, Guolong, Liang, Song, Liu, Zhenning
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2022
Zugriff auf das übergeordnete Werk:	Langmuir : the ACS journal of surfaces and colloids
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't Formates Rhodamines formic acid 0YIW783RG1 Hydrogen Peroxide BBX060AN9V rhodamine B K7G5SCF8IL

Beschreibung
Zusammenfassung:	Water pollution is a global challenge endangering people's health. In this work, an ultra-efficient photodegradation system of Rhodamine B (RhB) has been established using a graphitic carbon nitride nanosheet (CNNS) as the semiconductor photocatalyst, from which energy is harvested on both the conduction band and valence band by formic acid and hydrogen peroxide, respectively. The optimized FA/H2O2/CNNS system increases the apparent photodegradation rate of RhB by 25 folds, from 0.0198 to 0.4975 min-1. Through a comprehensive investigation with reactive oxygen species scavengers, electron paramagnetic resonance, high-performance liquid chromatography-mass spectrometry, etc., an oxidative mechanism for RhB photodegradation has been proposed, which combines enhanced charge carrier migration and synergistic generation of multiple radicals. Comparable performance improvements have also been observed for similar systems with different semiconductors, suggesting that such a catalytic system could afford a general approach to enhance semiconductor-catalyzed photodegradation
Beschreibung:	Date Completed 15.04.2022 Date Revised 15.04.2022 published: Print-Electronic Citation Status MEDLINE
ISSN:	1520-5827
DOI:	10.1021/acs.langmuir.1c03201