The power of photocatalysts, even those that only absorb ultraviolet, seems too good to be true:

•     Destroy even drug-resistant viruses and bacteria in air, water, and on surfaces
•     Clear dyes out of drinking water, especially needed in the developing countries
            to which the textile industry has migrated
•     Break apart VOCs in water into harmless compounds
•     Keep building surfaces clean
•     Reduce NOx in the air just by contact with surfaces 
•     Use in hospitals, restaraunts, cruise ships, restrooms, PDAs,
           too many more to list here!

Imagine if these amazing photocatalysts could work with visible light, even interior room light…