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

Chin Boon Ong, Law Yong Ng, Abdul Wahab Mohammad

Research output: Contribution to journalReview article

  • 16 Citations

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.

LanguageEnglish
Pages536-551
Number of pages16
JournalRenewable and Sustainable Energy Reviews
Volume81
DOIs
StatePublished - 1 Jan 2018

Fingerprint

Organic pollutants
Photocatalysts
Photodegradation
Nanoparticles
Photocatalysis
Weathering
Heterojunctions
Nanostructures
Doping (additives)
Health
Fabrication
Carbon
Costs
Water

Keywords

  • Nanoparticles
  • Persistent organic pollutants
  • Solar photocatalytic
  • Zinc oxide

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

Cite this

A review of ZnO nanoparticles as solar photocatalysts : Synthesis, mechanisms and applications. / Ong, Chin Boon; Ng, Law Yong; Mohammad, Abdul Wahab.

In: Renewable and Sustainable Energy Reviews, Vol. 81, 01.01.2018, p. 536-551.

Research output: Contribution to journalReview article

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