Synthesis of heterostructured Bi2O3–CeO2–ZnO photocatalyst with enhanced sunlight photocatalytic activity

Preparation of Bismuth Oxide Thin Films by Spray Pyrolysis Method and Its Characterizations

“…The observed direct band gap energy is 2.90 eV. The reported outcomes are in good contract with earlier results . The above all properties directed Bi 2 O 3 thin films are successfully prepared via cost effective spray pyrolysis method.…”

Microstructure and photocatalytic properties of polyimide/heterostructured NiO–Fe2O3–ZnO nanocomposite films via an ion-exchange technique

“…As compared to the PI/ZnO nanocomposite lm, the PI/ heterostructured NiO-Fe 2 O 3 -ZnO nanocomposite lms exhibits higher photocatalytic activity, which may be attributed to (1) the enhanced visible light absorbance of the PI/ heterostructured NiO-Fe 2 O 3 -ZnO as evidence in UV-visible absorption spectra (Fig. 6) and (2) the higher conduction band position and the lower valence bond of position semiconductor oxide among heterostructured NiO-Fe 2 O 3 -ZnO making interface charges easy transfer 18 (as proposed in Scheme 2), it will efficiently hinder the recombination of photogenerated electron-hole pairs and considerably enhance the photocatalytic activity.…”

“…This wide visible-light photo absorption of NiO-Fe 2 O 3 -ZnO may be ascribed to the vectorial transfer of induced electron and hole among the three semiconductors. 18 The band gap energies of photocatalysts can be estimated by the Kubelka-Munk theory. In this study, (ahn) n (n ¼ 1/2) vs. hn of the materials were plotted in Fig.…”

Comparative Study on the Effects of Surface Area, Conduction Band and Valence Band Positions on the Photocatalytic Activity of ZnO-M<sub>x</sub>O<sub>y</sub> Heterostructures

“…can reduce the band gap and extend the light absorption range of ZnO to a broader spectrum of the visible light, and promote electron-hole pair separation under sunlight irradiation in order to achieve higher photocatalytic activity [10]. The present authors have worked on coupled ZnO with CeO 2 and Bi 2 O 3 to construct Bi 2 O 3 -CeO 2 -ZnO heterostructure [11]. Bi 2 O 3 -CeO 2 -ZnO exhibited improved photocatalytic activity due to the extended visible-light photoabsorption range benefited from the presence of Bi 2 O 3 (small band gap of 2.77 eV) and efficient separation of photo-induced electrons and holes caused by the vector transfer of electrons and holes among ZnO, CeO 2 and Bi 2 O 3 [11].…”