Abstract
Heterogeneous semiconductor photocatalysis is a versatile technique for pollution control of air, water, and plastic. It degrades organic pollutants nonspecifically to carbon dioxide and water, reduces carbon dioxide to organic molecules, and generates the clean fuel hydrogen by splitting water. Though titanium dioxide (TiO2) is the most popular photocatalyst, zinc oxide (ZnO) has got a few advantages. Especially for solar or visible light photocatalysis, ZnO serves better. ZnO-based nanomaterials have been utilized for the treatment of polluted air, wastewater, and plastic under both artificial UV light and sunlight.
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