Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review
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REVIEW
Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review Yi Liu1,2 • Jing Huang1,2 • Xiaohua Feng1,2 • Hua Li1,2
Submitted: 24 August 2020 / in revised form: 5 October 2020 Ó ASM International 2020
Abstract There have been ever-growing demands for disinfection of water and air in recent years. Efficient, ecofriendly, and cost-effective methods of disinfection for pathogens are vital to the health of human beings. The photocatalysis route has attracted worldwide attention due to its highly efficient oxidative capabilities and sustainable recycling, which can be used to realize the disinfection purposes without secondary pollution. Though many studies have comprehensively reviewed the work about photocatalytic disinfection, including design and fabrication of photocatalytic coatings, inactivation mechanisms, or practical applications, systematic reviews about the disinfection photocatalysis coatings from fabrication to effort for practical use are still rare. Among different ways of fabricating photocatalytic materials, thermal spray is a versatile surface coating technique and competitive in constructing large-scale functional coatings, which is a
most promising way for the future environmental purification, biomedical and life health applications. In this review, we briefly introduced various photocatalytic materials and corresponding inactivation mechanisms for virus, bacteria and fungus. We summarized the thermalsprayed photocatalysts and their antimicrobial performances. Finally, we discussed the future perspectives of the photocatalytic disinfection coatings for potential applications. This review would shed light on the development and implementation of sustainable disinfection strategies that is applicable for extensive use for controlling pathogens in the near future. Keywords coating disinfection inactivation mechanisms photocatalyst thermal spray
Introduction This article is an invited paper selected from invited presentations at the International Thermal Spray Conference 2021 Virtual Preview Session on Coatings for Anti-Virus, Bacteria, and Fungus Applications, held on June 18, 2020, and has been expanded from the original oral presentation. & Yi Liu [email protected] & Hua Li [email protected] 1
Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
2
Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
A variety of pathogens (e.g., bacteria, viruses, fungi, algae) exist in water and air (Ref 1-4). Owing to the health threat caused by infections through air, water, food and a range of other modes of infection, elimination of the pathogens is a significant concern, which leads to a growing demand for disinfection techniques (Ref 5-7). Numerous measures have been taken to tackle the microbial co
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