Facile fabrication of efficient AgBr–TiO2 nanoheterostructured photocatalyst for degrading pollutants and its photogenerated charge transfer mechanism

Recyclable and visible light sensitive Ag–AgBr/TiO2: Surface adsorption and photodegradation of MO

“…The residual CTAB from the preparation step would definitely influence the evaluation of photodegradation activity and lead to obscure acquaintance. Nevertheless, such effect of CTAB was not made clear in the reported work [18,19,21,[29][30][31]. Besides, the effects of the loaded Ag-AgBr content on photocatalytic ability is comparatively less discussed but essential for understanding the intrinsic nature of photocatalysis [32][33][34].…”

“…Silver bromide (AgBr) is well known as a small band gap (2.6 eV) semiconductor for constructing heterostructured semiconductor system which can have visible-light response because of the charge transfer across semiconductor interface [16][17][18][19]. Hence, superior visible light photocatalytical performance can be expected when combining Ag/AgBr with TiO 2 to form multicomponent semiconductor [20].…”

Enhanced visible-light activities of porous BiFeO3 by coupling with nanocrystalline TiO2 and mechanism

“…1B). The corresponding band gaps of 3.2 eV for T and 2.07 eV for P-BFO were calculated by using equation Eg = 1240/λ [22]. In diffuse reflectance spectroscopy of T, the absorption edge lower than 400 is attributed to the electronic transition from the valance band to the conduction band (O2p→Ti3d) for anatase TiO 2 [21].…”

Visible-light responsive carbon–anatase–hematite core–shell microspheres for methylene blue photodegradation

“…As shown in Fig. 7, when α-Fe 2 O 3 nanoparticles deposited on the surfaces of TiO 2 , the Fermi levels of TiO 2 and α-Fe 2 O 3 must align in equilibrium due to the presence of the α-Fe 2 O 3 /TiO 2 heterojunction [32,33]. α-Fe 2 O 3 could be easily activated and yield charge carriers under visible light irradiation.…”