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Regulation of the rutile/anatase TiO2 phase junction in-situ grown on –OH terminated Ti3C2Tx (MXene) towards remarkably enhanced photocatalytic hydrogen evolution
Peng, Chao1; Zhou, Tao1; Wei, Ping1; Ai, Haoqiang2; Zhou, Bingpu2; Pan, Hui2; Xu, Wenkang3; Jia, Jianbo1; Zhang, Kun1; Wang, Hongjuan3; Yu, Hao3
2022-07-01
Source PublicationChemical Engineering Journal
ISSN1385-8947
Volume439
Abstract

Heterophase junction (HPJ) and hole trapping was regarded as effective strategies to improve photogenerated carrier separation and photocatalytic performance. In this work, a TiO HPJ with tunable anatase/rutile ratio was in-situ grown on –OH terminated TiCT MXene for efficient photocatalytic hydrogen production via a simple hydrothermal route in the presence of HCl. The number of anatase/rutile phase junction and TiO/TiCT heterojunction could be readily regulated by HCl concentration and hydrothermal duration, respectively. The optimized photocatalyst exhibited few layers TiCT MXene embedded into TiO with an atomic scale interface, containing a large amount of rutile/anatase phase junction. The mass and surface area normalized hydrogen evolution reaction (HER) performance of A/R-TiO/TiCT-36–0.25 (0.2 wt% Pt) achieved 4672.0 μmol gh and 244.6 μmol h m, which were 3.76 and 9.8 times higher than those of commercial P25 (0.2 wt% Pt), respectively. Apparent quantum yield of 27.11% at 350 nm also obtained on the optimum photocatalyst. The surface chemical analysis showed that the ethylene glycol treated TiCT MXene adsorbed a large amount of –OH on the surface which enabled a low work function (Φ = 2.28 eV). Therefore, photo-generated carriers were separated at the anatase/rutile phase junction interface, and photo-generated holes on TiO valance band were trapped by TiCT (T = –OH), so that the photocatalyst had remarkable charge separation and photocatalytic HER efficiency. This study could shed light on the new approach to the rational design of high-efficiency MXene-based heterophase junction photocatalysts.

KeywordCharge Separation Hole Mediator Photocatalytic Hydrogen Evolution Tio2 Heterophase Junction –oh Terminated Ti3c2tx Mxene
DOI10.1016/j.cej.2022.135685
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000783211100001
Scopus ID2-s2.0-85126103285
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorPeng, Chao
Affiliation1.School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, 529020, China
2.Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR, 999078, China
3.School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, 510640, China
Recommended Citation
GB/T 7714
Peng, Chao,Zhou, Tao,Wei, Ping,et al. Regulation of the rutile/anatase TiO2 phase junction in-situ grown on –OH terminated Ti3C2Tx (MXene) towards remarkably enhanced photocatalytic hydrogen evolution[J]. Chemical Engineering Journal,2022,439.
APA Peng, Chao,Zhou, Tao,Wei, Ping,Ai, Haoqiang,Zhou, Bingpu,Pan, Hui,Xu, Wenkang,Jia, Jianbo,Zhang, Kun,Wang, Hongjuan,&Yu, Hao.(2022).Regulation of the rutile/anatase TiO2 phase junction in-situ grown on –OH terminated Ti3C2Tx (MXene) towards remarkably enhanced photocatalytic hydrogen evolution.Chemical Engineering Journal,439.
MLA Peng, Chao,et al."Regulation of the rutile/anatase TiO2 phase junction in-situ grown on –OH terminated Ti3C2Tx (MXene) towards remarkably enhanced photocatalytic hydrogen evolution".Chemical Engineering Journal 439(2022).
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