ABSTRACT
The exponential research on photocatalysis has opened a gateway for the synthesis of multitudinous products and desired chemical fuels. The electron transfer mechanism is initiated by the exposure of radiation by a suitable light source such as solar light, UV light, visible light, and mercury lamps depending on the energy band gap of nanoparticles. On the incorporation of an impurity in semiconductors nanomaterials, a Fermi level is introduced between the conduction and valence bands. Both binary oxide and chalcogenide semiconductor nanomaterials begged heterogeneous photocatalysis activity. Multitudinous nanophotocatalysts are synthesized by the modulation of CB and VB edges. It has been concluded that a strong competition exists between interfacial charge transfer and charge carrier recombination after suitable excitation of nanophotocatalysts, which strongly influences the photocatalytic behavior and acts as a detrimental factor for photocatalytic efficiency measurements. A communal mindset from the level of basic science to the level of system architecture is vitally important in the future.
