Enhancement of TiO2 photocatalytic activity under visible light by doping with Cu from electroplating wastewater

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO2 Nanoparticles Film

“…Due to their potential for clean and sustainable technology, light harvesting materials and strategies have gained considerable attention in the last couple of years. TiO 2 is extensively investigated due to its direct wide bandgap and tunable electrical and optical properties that originate from its intragap energy levels related to inherited surface defects and oxygen vacancies. , Such unique properties enable TiO 2 to be highly desirable in light harvesting applications such as photocatalysis, photovoltaics, photodetection, and photoelectrochemical sensing . Due to its hypotoxicity and abundance, developing efficient photoconductivity of TiO 2 in the visible band will significantly impact the environment and device production cost .…”

“…Due to its hypotoxicity and abundance, developing efficient photoconductivity of TiO 2 in the visible band will significantly impact the environment and device production cost . Several attempts to extend the optical absorption of TiO 2 to the visible spectral region by doping with different materials have been reported. ,− In parallel, reducing the bandgap of TiO 2 by defects engineering has also been considered by deliberately introducing Ti 3+ , lattice disorder defects, and oxygen defects within the crystalline structure of TiO 2 . − However, these attempts often lack long-term stability and repeatability …”

Study of electronic and optical properties of As-doped TiO2 using first principles

“…The photocatalytic performance of TiO 2 modified with these doping elements has been significantly improved. For example, Suwondo et al [12] studied the band gap of Cu-doped TiO 2 and its photocatalytic activity. The results show that the band gap of Cu-doped TiO 2 can be narrowed to 2.878 eV.…”