Journal
APPLIED SURFACE SCIENCE
Volume 473, Issue -, Pages 500-510Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.12.177
Keywords
Photocatalysis; Metal-support interaction; Water reduction; Facet; Charge separation
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Funding
- National Natural Science Foundation of China [21703001, 21525313]
- Changjiang Scholars Program of Ministry of Education of China
- Natural Science Foundation of Anhui Province [1808085QB32]
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CuOx/TiO2 photocatalysts prepared with anatase TiO2 nanocrystals exposing different types of facets as supports were examined for photocatalytic H-2 production in methanol/water solution under simulated solar light. Catalyst structures were characterized by XRD, HRTEM, XPS, UV-vis, EPR, PL, H-2 -TPR and CO chemisorption. Enhanced photocatalytic H-2 productions of CuOx/TiO2 photocatalysts followed an order of CuOx/TiO2{0 0 1} > CuOx/TiO2-{1 0 0} > CuOx/TiO2-{1 0 1}. TiO2 facets were found to strongly affect the CuOx-TiO2 interaction and structures of CuOx/TiO2 photocatalysts. Cu2O-TiO2 interaction in CuOx/TiO2-{0 0 1} photocatalyst is the strongest, resulting in the highest Cu2O dispersion and density of Cu2O-TiO2 heterojunctions active in photocatalytic H-2 production. The results add insights into morphology engineering as an effective strategy to tune structures and photocatalytic activity of TiO2 -based composite photocatalysts.
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