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A review of ZnO nanoparticles as solar photocatalysts: Synthesis, mechanisms and applications

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  • Ong, Chin Boon
  • Ng, Law Yong
  • Mohammad, Abdul Wahab

Abstract

Persistent organic pollutants (POPs) are carbon-based chemical substances that are resistant to environmental degradation and may not be completely removed through treatment processes. Their persistence can contribute to adverse health impacts on wild-life and human beings. Thus, the solar photocatalysis process has received increasing attention due to its great potential as a green and eco-friendly process for the elimination of POPs to increase the security of clean water. In this context, ZnO nanostructures have been shown to be prominent photocatalyst candidates to be used in photodegradation owing to the facts that they are low-cost, non-toxic and more efficient in the absorption across a large fraction of the solar spectrum compared to TiO2. There are several aspects, however, need to be taken into consideration for further development. The purpose of this paper is to review the photo-degradation mechanisms of POPs and the recent progress in ZnO nanostructured fabrication methods including doping, heterojunction and modification techniques as well as improvements of ZnO as a photocatalyst. The second objective of this review is to evaluate the immobilization of photocatalyst and suspension systems while looking into their future challenges and prospects.

Suggested Citation

  • Ong, Chin Boon & Ng, Law Yong & Mohammad, Abdul Wahab, 2018. "A review of ZnO nanoparticles as solar photocatalysts: Synthesis, mechanisms and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 536-551.
  • Handle: RePEc:eee:rensus:v:81:y:2018:i:p1:p:536-551
    DOI: 10.1016/j.rser.2017.08.020
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    Cited by:

    1. Sinar Mashuri, Salma Izati & Kasim, Muhd Firdaus & Mohd Kaus, Noor Haida & Tan, Yie Hua & Islam, Aminul & Rashid, Umer & Asikin-Mijan, N. & Andas, Jeyashelly & Taufiq-Yap, Y.H. & Yaakob, Muhamad Kamil, 2023. "Photo-response range extension of Z-scheme ZnO/CdS for LED-light-driven photo-active catalyst," Renewable and Sustainable Energy Reviews, Elsevier, vol. 184(C).
    2. Zan Li & Hongkun Zhang & Wenrui Jiang, 2021. "Research on the Sustainable Heterogeneous Catalyst Development for Photocatalytic Treatment of Phenol," Sustainability, MDPI, vol. 13(9), pages 1-12, April.
    3. Trivedi, S. & Prochowicz, D. & Kalam, A. & Tavakoli, M.M. & Yadav, P., 2021. "Development of all-inorganic lead halide perovskites for carbon dioxide photoreduction," Renewable and Sustainable Energy Reviews, Elsevier, vol. 145(C).
    4. Herbet B. Sales & Romualdo R. Menezes & Gelmires A. Neves & João J. N. de Souza & Jailson M. Ferreira & Laís Chantelle & André L. Menezes de Oliveira & Hélio de L. Lira, 2020. "Development of Sustainable Heterogeneous Catalysts for the Photocatalytic Treatment of Effluents," Sustainability, MDPI, vol. 12(18), pages 1-18, September.
    5. Mamur, Hayati & Bhuiyan, M.R.A. & Korkmaz, Fatih & Nil, Mustafa, 2018. "A review on bismuth telluride (Bi2Te3) nanostructure for thermoelectric applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 4159-4169.
    6. Xu, Shenming & Jiang, Jiangang & Ren, Wenyi & Wang, He & Zhang, Rui & Xie, Yingge & Chen, Yubin, 2020. "Construction of ZnO/CdS three-dimensional hierarchical photoelectrode for improved photoelectrochemical performance," Renewable Energy, Elsevier, vol. 153(C), pages 241-248.
    7. Ansari, Anees A. & Sillanpää, Mika, 2021. "Advancement in upconversion nanoparticles based NIR-driven photocatalysts," Renewable and Sustainable Energy Reviews, Elsevier, vol. 151(C).
    8. Abdulrasheed, Abdulrahman & Jalil, Aishah Abdul & Gambo, Yahya & Ibrahim, Maryam & Hambali, Hambali Umar & Shahul Hamid, Muhamed Yusuf, 2019. "A review on catalyst development for dry reforming of methane to syngas: Recent advances," Renewable and Sustainable Energy Reviews, Elsevier, vol. 108(C), pages 175-193.

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