ZnO nanorods with GaSe nanoflakes form a heterojunction for solar water oxidation
Markhabayeva A. Kalkozova Z. Mukhametkarimov Y. Yerlanuly Y. Nemkayeva R. Oman Z. Cao C. Abdullin K. Bozheyev F.
30 August 2025Elsevier B.V.
Applied Surface Science
2025#701
Converting solar energy into chemical energy is an advantageous approach. Different material combinations are used to absorb solar light effectively for water oxidation. Type II heterostructures are materials in which the conduction band minimum and the valence band maximum are located in different materials. This spatial separation of electron and hole states results in unique electronic and optical properties promising for solar water splitting. The ZnO/GaSe exhibits a photocurrent density of 800 µA/cm2 at 1.23 VRHE, which is higher than that of ZnO alone (250 µA/cm2). Moreover, PEC measurements showed that the onset potential is negatively shifted from 0.3 V to -0.1 VRHE. The heterojunction formed between ZnO and GaSe can facilitate efficient carrier separation and transfer from EIS results, which is crucial for improving the performance of the photoelectrodes in PEC water splitting.
GaSe , Heterojunction , Nanoflakes , Nanorods , Photocurrent density , Photoelectrochemistry , Water oxidation , ZnO , ZnO/GaSe
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Institute of Applied Science and Information Technologies, Baizakov Str. 280, Almaty, 050042, Kazakhstan
National Nanolaboratory, Al-Farabi Kazakh National University, Al-Farabi Ave. 71, Almaty, 050040, Kazakhstan
School of Physical Science and Technology, Northwestern Polytechnical University, Xian, 710072, China
Institute of Applied Science and Information Technologies
National Nanolaboratory
School of Physical Science and Technology
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