Microbial fuel cell assisted band gap narrowed TiO₂ for visible light-induced photocatalytic activities and power generation.

ABSTRACT: This paper reports a simple, biogenic and green approach to obtain narrow band gap and visible light-active TiO₂ nanoparticles. Commercial white TiO₂ (w-TiO₂) was treated in the cathode chamber of a Microbial Fuel Cell (MFC), which produced modified light gray TiO₂ (g-TiO₂) nanoparticles. The DRS, PL, XRD, EPR, HR-TEM, and XPS were performed to understand the band gap decline of g-TiO₂. The optical study revealed a significant decrease in the band gap of the g-TiO₂ (E _g  = 2.80 eV) compared to the w-TiO₂ (E _g  = 3.10 eV). The XPS revealed variations in the surface states, composition, Ti⁴⁺ to Ti³⁺ ratio, and oxygen vacancies in the g-TiO₂. The Ti

SUBMITTER: Khan ME 

PROVIDER: S-EPMC5788852 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature