An effective strategy for improving charge separation efficiency and photocatalytic degradation performance using a facilely synthesized oxidative TiO₂ catalyst

Abstract

Titanium dioxide (TiO2) has drawn enormous interests in abundant photocatalytic reactions, but its photocatalytic efficiency is limited by the wide band gap and the rapid recombination of electron-hole pairs. To...

A Review on Nano Ti-Based Oxides for Dark and Photocatalysis: From Photoinduced Processes to Bioimplant Applications

“…Oxygen doping in TiO 2 interstices can also improve photocatalytic performance by enhancing charge separation efficiency. For the photodegradation of methyl orange, O-doped or oxidative TiO 2 showed a 2~3.7 times higher rate than pristine TiO 2 , with the former fabricated using KMnO 4 to create trap sites to separate charges via bandgap impurity states [ 150 ].…”

Improved photoredox activity of the 2D Bi4Ti3O12–BiVO4–Bi4V2O10 heterostructure via the piezoelectricity-enhanced charge transfer effect

“…In order to clarify the underlying reaction mechanism of photocatalytic redox, ESR measurements with DMPO as the spin-trapping agent were performed to prove the reactive species under UV-vis light over BiVO 4 , BVO, and the BTO/ BVO-3 heterostructure. 48,49 Evidently, the characteristic signals of DMPO-• O 2 − and DMPO-• OH were not observed in any of the as-obtained photocatalysts under dark conditions (Fig. S9 †).…”

Flower-like Ag2WO4/CeO2 heterojunctions with oxygen vacancies and expedited charge carrier separation boost the photocatalytic degradation of dyes and drugs

“…Semiconductor photocatalysis technology may turn waste into treasure and provides a convenient approach to solving the issues of atmospheric environment/water pollution through directly using solar energy to eliminate pollutants and to produce renewable energy. 2,3 CeO 2 is a rich rare earth metal oxide and an excellent semiconductor with low cost, non-toxic and redox characteristics, and physicochemical stability. 4 However, CeO 2 with a band gap of 3.0 eV only responds to near ultraviolet light, and it is difficult to separate the photogenerated carriers, which limits the efficient conversion of solar energy.…”