PRODUCT LINKS:
Amazon has these small ozone generators; here's the link to a bunch of them. (affiliate link) You'll want to make sure you're purchasing a rechargeable unit that produces at least 30mg of ozone per hour.
Wikipedia: Ozone
Wikipedia: Ozone Sterilization
ADDITIONAL READING:
CDC mentions ozone as a sterilization method in healthcare facilities.
MORE GOOD STUFF:
Want honest CoVid19 statistics without media hype, check out nCoV2019.live. This highly-recommended site is the brainchild of Avi Schiffmann, a high schooler in Washington State, USA. Our future is in good hands with smart folks like Avi coming up with impressive solutions like this.
Ozone Compound Summary from PubChem. PubChem is the open chemistry database at the National Institutes of Health.
BroZone: 2 Brothers + 3 Oxygen Atoms = Cleaner, Fresher Sports Gear
Ozone Improves the Aromatic Fingerprint of White Grapes., November 24, 2017, US National Library of Medicine.