Sporicidal performance induced by photocatalytic production of organic peroxide under visible light irradiation

Yuichi Yamaguchi, Takahito Shimodo, Noriyasu Chikamori, Sho Usuki, Yoshihiro Kanai, Takeshi Endo, Ken Ichi Katsumata, Chiaki Terashima, Masahiko Ikekita, Akira Fujishima, Tomonori Suzuki, Hideki Sakai, Kazuya Nakata

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Bacteria that cause serious food poisoning are known to sporulate under conditions of nutrient and water shortage. The resulting spores have much greater resistance to common sterilization methods, such as heating at 100 °C and exposure to various chemical agents. Because such bacteria cannot be inactivated with typical alcohol disinfectants, peroxyacetic acid (PAA) often is used, but PAA is a harmful agent that can seriously damage human health. Furthermore, concentrated hydrogen peroxide, which is also dangerous, must be used to prepare PAA. Thus, the development of a facile and safe sporicidal disinfectant is strongly required. In this study, we have developed an innovative sporicidal disinfection method that employs the combination of an aqueous ethanol solution, visible light irradiation, and a photocatalyst. We successfully produced a sporicidal disinfectant one hundred times as effective as commercially available PAA, while also resolving the hazards and odor problems associated with PAA. The method presented here can potentially be used as a replacement for the general disinfectants employed in the food and health industries.

Original languageEnglish
Article number33715
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 26 Sep 2016

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