Cargando…

Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS(2) in CdS/TiO(2) Photocatalyst

As promising heterojunction photocatalysts, the binary CdS-based heterojunctions were investigated extensively. In most of the reported CdS-based heterojunctions, however, electrons come from the semiconductor with wide band gap (e.g., TiO(2)) would limit the visible-light absorption of CdS and henc...

Descripción completa

Detalles Bibliográficos
Autores principales: Chen, Wenqian, Zhang, Shaomei, Wang, Ganyu, Huang, Gang, Yu, Zhichong, Li, Yirui, Tang, Liang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7823533/
https://www.ncbi.nlm.nih.gov/pubmed/33375731
http://dx.doi.org/10.3390/nano11010038
_version_ 1783639858183405568
author Chen, Wenqian
Zhang, Shaomei
Wang, Ganyu
Huang, Gang
Yu, Zhichong
Li, Yirui
Tang, Liang
author_facet Chen, Wenqian
Zhang, Shaomei
Wang, Ganyu
Huang, Gang
Yu, Zhichong
Li, Yirui
Tang, Liang
author_sort Chen, Wenqian
collection PubMed
description As promising heterojunction photocatalysts, the binary CdS-based heterojunctions were investigated extensively. In most of the reported CdS-based heterojunctions, however, electrons come from the semiconductor with wide band gap (e.g., TiO(2)) would limit the visible-light absorption of CdS and hence lower the performance. In this work, we introduced 1T-MoS(2) to form a novel ternary heterojunction, namely CdS/1T-MoS(2)/TiO(2), in which 1T-MoS(2) has more positive conduction band than CdS and TiO(2). The hydrogen evolution rate of CdS/1T-MoS(2)/TiO(2) reaches 3.15 mmol g(−1) h(−1), which is approximately 12 and 35 times higher than that of pure CdS and CdS/TiO(2) binary heterojunction under the same conditions, respectively. This performance enhancement could be attributed to the presence of 1T-MoS(2) and a plausible mechanism is proposed based on photoelectrochemical characterizations. Our results illustrate that the performance of CdS-based heterojunctions for solar hydrogen evolution can be greatly improved by appropriate materials selection.
format Online
Article
Text
id pubmed-7823533
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-78235332021-01-24 Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS(2) in CdS/TiO(2) Photocatalyst Chen, Wenqian Zhang, Shaomei Wang, Ganyu Huang, Gang Yu, Zhichong Li, Yirui Tang, Liang Nanomaterials (Basel) Article As promising heterojunction photocatalysts, the binary CdS-based heterojunctions were investigated extensively. In most of the reported CdS-based heterojunctions, however, electrons come from the semiconductor with wide band gap (e.g., TiO(2)) would limit the visible-light absorption of CdS and hence lower the performance. In this work, we introduced 1T-MoS(2) to form a novel ternary heterojunction, namely CdS/1T-MoS(2)/TiO(2), in which 1T-MoS(2) has more positive conduction band than CdS and TiO(2). The hydrogen evolution rate of CdS/1T-MoS(2)/TiO(2) reaches 3.15 mmol g(−1) h(−1), which is approximately 12 and 35 times higher than that of pure CdS and CdS/TiO(2) binary heterojunction under the same conditions, respectively. This performance enhancement could be attributed to the presence of 1T-MoS(2) and a plausible mechanism is proposed based on photoelectrochemical characterizations. Our results illustrate that the performance of CdS-based heterojunctions for solar hydrogen evolution can be greatly improved by appropriate materials selection. MDPI 2020-12-25 /pmc/articles/PMC7823533/ /pubmed/33375731 http://dx.doi.org/10.3390/nano11010038 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chen, Wenqian
Zhang, Shaomei
Wang, Ganyu
Huang, Gang
Yu, Zhichong
Li, Yirui
Tang, Liang
Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS(2) in CdS/TiO(2) Photocatalyst
title Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS(2) in CdS/TiO(2) Photocatalyst
title_full Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS(2) in CdS/TiO(2) Photocatalyst
title_fullStr Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS(2) in CdS/TiO(2) Photocatalyst
title_full_unstemmed Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS(2) in CdS/TiO(2) Photocatalyst
title_short Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS(2) in CdS/TiO(2) Photocatalyst
title_sort rationally designed cds-based ternary heterojunctions: a case of 1t-mos(2) in cds/tio(2) photocatalyst
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7823533/
https://www.ncbi.nlm.nih.gov/pubmed/33375731
http://dx.doi.org/10.3390/nano11010038
work_keys_str_mv AT chenwenqian rationallydesignedcdsbasedternaryheterojunctionsacaseof1tmos2incdstio2photocatalyst
AT zhangshaomei rationallydesignedcdsbasedternaryheterojunctionsacaseof1tmos2incdstio2photocatalyst
AT wangganyu rationallydesignedcdsbasedternaryheterojunctionsacaseof1tmos2incdstio2photocatalyst
AT huanggang rationallydesignedcdsbasedternaryheterojunctionsacaseof1tmos2incdstio2photocatalyst
AT yuzhichong rationallydesignedcdsbasedternaryheterojunctionsacaseof1tmos2incdstio2photocatalyst
AT liyirui rationallydesignedcdsbasedternaryheterojunctionsacaseof1tmos2incdstio2photocatalyst
AT tangliang rationallydesignedcdsbasedternaryheterojunctionsacaseof1tmos2incdstio2photocatalyst