Titanium dioxide (TiO2) photocatalysis technology for nonthermal inactivation of microorganisms in foods |
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| Affiliation: | 1. School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China;2. Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China;3. Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, Guangzhou Higher Education Mega Center, Guangzhou 510006, China;4. Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland;1. Department of Biotechnology, Yonsei University, Seoul 03722, South Korea;2. Department of Food Science and Human Nutrition, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan;3. Department of Food Science and Technology, Chung-Ang University, Anseong 17546, South Korea;1. Laboratory of Reaction Engineering, Faculty of Mechanical Engineering and Process Engineering, USTHB, BP 32, Algiers, Algeria;2. Unir, ENSCR-11, allée de Beaulieu, CS508307-35708 Rennes, France;3. Faculty of Science and Arts-Qilwah, 65941, Albaha University, Saudi Arabia;4. Centre de Recherche et de Technologies des Eaux, CERTE, Laboratory of Nature Water Treatment (LabTEN), BP 273, Soliman 8020, Tunisia;5. Swiss Federal Institute of Technology (EPFL), EPFL-SB-ISIC-GPAO, 1015 Lausanne, Switzerland;1. College of Food Science and Technology, Nanjing Agricultural University, 1st Tongwei Road, Weigang, Nanjing, Jiangsu 210095, PR China;2. Quality and Safety Assessment Research Unit, 950 College Station Road, Athens, GA 30605, USA |
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| Abstract: | BackgroundMicrobial contamination is a serious challenge in the food industry. With the increasing demand for fresh, nutritious and healthy food, novel techniques for microbial inactivation are highly needed. By absorbing photoenergy, titanium dioxide (TiO2) based photocatalyst can produce reactive oxygen species (ROS) that are capable of inactivating microorganisms.Scope and approachThis review summarizes recent research developments of TiO2 photocatalysis (TPC) for antibacterial applications in liquid, gas and solid systems in the food industry. Basic principles of TPC, the mechanism of photocatalytic inactivation, and strategies for improving photoactivity are described, and applications of TPC for decomposing organic substances are presented. Furthermore, applications of combining TPC with other technologies are also discussed.Conclusionsand key findings: The review shows that TPC technology has the ability to inactivate foodborne microorganisms, but with some drawbacks such as catalyst deactivation and low utilization of visible light. Modification can widen the light response into visible range and improve the photoactivity. The combined technologies can enhance the effectiveness of microbial inactivation. However, further study is still needed to improve both photocatalytic disinfection efficiency and food quality maintenance. |
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| Keywords: | Microbial inactivation Food safety Titanium dioxide Food preservation |
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