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ZnO based heterojunctions and their application in environmental photocatalysis
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström. China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström.
Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.ORCID iD: 0000-0001-5055-5627
Beijing Forestry Univ, Coll Mat Sci & Technol, Beijing 100083, Peoples R China.
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2016 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 27, no 40, article id 402001Article, review/survey (Refereed) Published
Abstract [en]

As an alternative to TiO2 photocatalysts, ZnO exhibits a large potential for photocatalytic (PC) applications in environmental treatments, such as degradation of wastewater, sterilization of drinking water, and air cleaning. However, the efficiency achieved with ZnO to date is far from that expected for commercialization, due to rapid charge recombination, photo-corrosion as well as poor utilization of solar energy. Fortunately, in recent years, a great number of breakthroughs have been achieved in PC performance (including activity and stability) of micro-/ nano-structured ZnO by forming heterojunctions (HJs) with metal nanoparticles (NPs), carbon nanostructures and other semiconductors. In most cases, the improvement of PC performance was ascribed to the better charge separation at the interfaces between ZnO and the other components. Sometimes, the formation of hybrids is also in favor of visible light harvesting. This review summarizes recent advances in the fields of environmental photocatalysis by ZnO based HJs, and especially emphasizes their abilities in degradation of organic pollutants or harmful substances in water. We aim to reveal the mechanism underlying the enhanced PC performance by constructing HJs, and extend the potential of ZnO HJ photocatalysts for future trends, and practical, large-scale applications in environment-related fields.

Place, publisher, year, edition, pages
2016. Vol. 27, no 40, article id 402001
Keywords [en]
ZnO, heterojunction, photocatalysis, nanostructure, environmental treatment
National Category
Nano Technology Materials Engineering
Identifiers
URN: urn:nbn:se:uu:diva-400848DOI: 10.1088/0957-4484/27/40/402001ISI: 000412627700001PubMedID: 27575520OAI: oai:DiVA.org:uu-400848DiVA, id: diva2:1382982
Available from: 2020-01-07 Created: 2020-01-07 Last updated: 2020-01-07Bibliographically approved

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Zhu, Jie-Fang

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