Degradation of methylene blue via photocatalysis of transition metal-loaded sulfated TiO2

Synthesis and characterization of reduced-graphene oxide/TiO2/Zeolite-4A: A bifunctional nanocomposite for abatement of methylene blue

“…The CB of TiO 2 lies in the suitable range (~ 2 V) to oxidize hydroxide to hydroxyl radical, whereas the VB lies (~ -1 V) in the suitable range to reduce oxygen to superoxide radical [1][2][3][4][5]. During photodegradation, these reactive species attack the target pollutants and fragment them into finer molecules and mineralize them [6][7][8][9][10][11][12].…”

Influence of Sulfation Treatment on Photocatalytic Performance of Mesoporous Bi<SUB>2</SUB>O<SUB>3</SUB>–TiO<SUB>2</SUB> Composites

“…25 26 Among the sulfated transition metals (V, Cr, Mn, Fe, Co, Ni, Cu and Zn) loaded TiO 2 catalysts, V and Fe containing catalysts exhibited superior photocatalytic activity, assessed by degradation of methylene blue. 27 Whereas, Pt-codoped sulfated TiO 2 showed remarkable photoactivity enhancement, compared with bare or non-sulfated Pt-codoped TiO 2 . 26 These results confirm sulfation as an appealing modification route from photocatalytic enhancement point of view.…”

Synthesis, characterization and photocatalytic activity of active carbon/ZnO nanocomposites using solar light

“…This method using solar energy for complete demineralization of contaminants is a promising technique for achieving green chemistry goals.Semiconductor 5 based photocatalysts using wide band gap metal oxides such as TiO2, SnO2and ZnO 6 , are commonly used due to their opto-electronic properties, high stability, low toxicity and efficient cost. The recent reports show better photocatalytic activity [7][8][9] of ZnO in comparison with TiO2 and SnO2. Thus extensive research has been carried out using ZnO for degradation of organic contaminants present in wastewater 10-13. During photocatalysis electrons from photocatalyst are photoexcited from valence band to conduction band and e/h pairs are generated.…”