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Ye R, Fang H, Zheng YZ, et al. Fabrication of CoTiO3/g-C3N4 Hybrid Photocatalysts with Enhanced H2 Evolution: Z-Scheme Photocatalytic Mechanism Insight. ACS Appl Mater Interfaces. 2016;8(22):13879-89doi: 10.1021/acsami.6b01850.
Ye, R., Fang, H., Zheng, Y. Z., Li, N., Wang, Y., & Tao, X. (2016). Fabrication of CoTiO3/g-C3N4 Hybrid Photocatalysts with Enhanced H2 Evolution: Z-Scheme Photocatalytic Mechanism Insight. ACS applied materials & interfaces, 8(22), 13879-89. https://doi.org/10.1021/acsami.6b01850
Ye, RongQin, et al. "Fabrication of CoTiO3/g-C3N4 Hybrid Photocatalysts with Enhanced H2 Evolution: Z-Scheme Photocatalytic Mechanism Insight." ACS applied materials & interfaces vol. 8,22 (2016): 13879-89. doi: https://doi.org/10.1021/acsami.6b01850
Ye R, Fang H, Zheng YZ, Li N, Wang Y, Tao X. Fabrication of CoTiO3/g-C3N4 Hybrid Photocatalysts with Enhanced H2 Evolution: Z-Scheme Photocatalytic Mechanism Insight. ACS Appl Mater Interfaces. 2016 Jun 08;8(22):13879-89. doi: 10.1021/acsami.6b01850. Epub 2016 May 23. PMID: 27180943.
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ACS Appl Mater Interfaces. 2016 Jun 08;8(22):13879-89. doi: 10.1021/acsami.6b01850. Epub 2016 May 23.

Fabrication of CoTiO3/g-C3N4 Hybrid Photocatalysts with Enhanced H2 Evolution: Z-Scheme Photocatalytic Mechanism Insight.

ACS applied materials & interfaces

RongQin Ye, HuaBin Fang, Yan-Zhen Zheng, Nan Li, Yuan Wang, Xia Tao

Affiliations

  1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology , Beijing 100029, China.
  2. Research Centre of the Ministry of Education for High Gravity Engineering & Technology, Beijing University of Chemical Technology , Beijing 100029, China.

PMID: 27180943 DOI: 10.1021/acsami.6b01850

Abstract

A novel direct Z-scheme CoTiO3/g-C3N4 (CT-U) photocatalytic system with different weight percentage of CoTiO3 was synthesized using a facile in situ growth method for H2 evolution from water splitting. The as-prepared CT-U composites composed of 1D CoTiO3 microrod and 2D g-C3N4 nanosheet were characterized by various techniques including XRD, SEM, TEM, XPS, FTIR, and UV-vis. Results demonstrate that the CT-U composite photocatalysts were successfully fabricated, with intimate interfacial contact and heterojunction interaction between g-C3N4 and CoTiO3 which can significantly boost the photocatalytic activity compared with prinstine g-C3N4 and CoTiO3. The most enhanced H2-evolution rate of 858 μmol h(-1) g(-1) and high quantum efficiency (38.4% at 365 nm, 3.23% at 420 ± 20 nm) are achieved at an optimal 0.15% CT-U. Meanwhile, the 0.15% CT-U sample exhibits good photocatalytic stability in recycling H2 evolution. Accordingly, direct Z-scheme mechanism capable of leading efficient charge carrier separation and strong reduction ability for enhanced H2 production was proposed, and further evidenced by PL, photoelectrochemical analysis, and ESR assay.

Keywords: CoTiO3; H2 production; Z-scheme mechanism; g-C3N4; photocatayst; quantum efficiency

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