It can split water molecules or decompose organic compounds when exposed to light, which is a promising feature for environmental clean-up operations and renewable energy initiatives It can split water molecules or decompose organic compounds when exposed to light, which is a promising feature for environmental clean-up operations and renewable energy initiativesr 5566 titanium dioxide. Furthermore, when titanium dioxide nanoparticles are incorporated into cement or concrete, they can endow self-cleaning properties to architectural surfaces by promoting the breakdown of pollutants like nitrogen oxides under UV light.0.3% Max