High-efficiency entangled hierarchical GaN nanowire-based photoanode for solar-driven water splitting

Abdullah, Ameer; Tariq, Fawad; Kulkarni, Mandar A.; Thaalbi, Hamza; Ha, Jun-Seok; Key Lee, June; Ryu, Sang-Wan

doi:10.1016/j.apsusc.2023.158647

Cited by 5 publications

(1 citation statement)

References 42 publications

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“…Nowadays, there are various promising and creative ways to produce hydrogen using water splitting methods, e.g., employing different types of metal oxides 21 as well as GaN nanowire-based photoanodes 22 . In this regard, studies have shown that ZnO exhibits chemical stability and large exciton binding energy; it can also be synthesized via different simple and inexpensive methods 23 , 24 .…”

Section: Introductionmentioning

confidence: 99%

Preparation of a polyaniline/ZnO-NPs composite for the visible-light-driven hydrogen generation

Azmayesh,

Naghshara,

Mohammadi Aref

et al. 2024

Sci Rep

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Compositions of ZnO nanoparticles and polyaniline, in the form of emeraldine salt, were manufactured as thin layers by using the spin-coating method. Then, the effect of polyaniline content on their photoelectrochemical characteristics was studied. Results indicate that all the samples are sensitive to light. Besides, with 0.30% of PANI, the composite sample demonstrates the highest photocurrent density; also, its photocurrent increment starts to increase at a voltage of ⁓ 1.23 V (vs. RHE), which is approximately in accordance with the theoretical potential of water electrolysis. Furthermore, since the rate of electron–hole recombination in this composite sample is the lowest, it possesses the highest photoelectrochemical efficiency. Main findings were analyzed with respect to UV–visible absorption and photoluminescence spectra as well as SEM micrographs of the samples and Raman spectral measurements. Besides, electrochemical impedance spectroscopy analysis was applied to both pure ZnO and the sample with the best response. Effects of drying temperature and layer thickness were also investigated.

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