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Effects of pH on the light-induced photoelectrochemical performances of NiO/ZrO2 nanoparticles

Yongjian Liu, Xuebing Liu, Rui Liu, Shuang Chang, and Dongmei Wu

Department of Stomatology, Taihe Hospital, Hubei University of Medicine, Shiyan, People’s Republic of China



Received: 16 July 2022  Accepted: 4 November 2022


This paper proposes the use of NiO to modify ZrO2 to obtain a higher photoelectrochemical (PEC) efficiency. A ZrO2 photoelectrode was synthesized via electrodeposition, and the photocurrent density of the resulting photoelectrode was investigated using a pH electrolyte solution. The NiO/ZrO2 photoelectrode demonstrated increased PEC performance when used as a pp junction photocathode. At pH = 2.8, the photocurrent density of the NiO/ZrO2 photoelectrode was 7.78 μA/cm2, which was roughly 2.5 times greater than that of ZrO2 (0.2 V vs SCE). The development of a pp junction at the photoelectrode surface of ZrO2 minimized electron–hole pair recombination while increasing the PEC.

Keywords: Photoelectrochemical; p–p junction; NiO/ZrO2; Electron–hole pairs

Full paper is available at

DOI: 10.1007/s11696-022-02582-6


Chemical Papers 77 (4) 1879–1886 (2023)

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