Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 635, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.128103
Keywords
Cu-2_Se-x; g-C3N4; Heterojunction; In situ hot-injection method; photocatalytic H-2 evolution
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Funding
- National Natural Science Foundation of China [22078261, 21676213, 11974276]
- Natural Science Basic Research Program of Shaanxi province [2020JM-422]
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The Cu2_xSe/g-C3N4 heterojunction was successfully constructed using a one-step method for photocatalytic H2 evolution from water, with the optimal Cu2_xSe/g-C3N4-10 wt% exhibiting an efficient H2 evolution rate. This could be attributed to its improved light capturing ability and abundant active sites.
The Cu2_ xSe/g-C3N4 heterojunction was successfully constructed using a one-step method and employed to photocatalytic H2 evolution from water for the first time. The optimal Cu2_xSe/g-C3N4-10 wt% exhibits an efficient H2 evolution rate of 1954.9 mu mol.g_ 1.h_ 1, which is nearly 2.2 and 18.6 times higher than that of the pristine Cu2_xSe and g-C3N4. This could owe to the improved light capturing ability, abundant active sites, efficient charge carriers' separation for the appropriate band gap structures between Cu2_xSe and g-C3N4. In addition, a photocatalytic H2 production mechanism over Cu2_xSe/g-C3N4 heterojunction is analyzed based on the investigation on energy band structures and photoelectric properties of the components.
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