Preparation of ordered mesoporous Ag/WO3 and its highly efficient degradation of acetaldehyde under visible-light irradiation

Synthesis of mesoporous Ag/ZnO nanocrystals with enhanced photocatalytic activity

“…It is reported that the plasmon excited electrons of metal transfer to the conduction band of semiconductor, which is called direct electron transfer instead of resonant energy transfer [55]. However, in Ag/ZnO, the CB level of ZnO is more negative than the work function of Ag (4.26 eV), so the electron transfer from Ag to ZnO is energetically undesirable [32,55]. previously published works [50,51,54].…”

“…On the other hand, addition of a low percentage of noble metals such as Au, Pt, Ag, and Pd on the semiconductors (TiO 2 or ZnO) surface is playing a vital role to efficiently facilitate photogenerated charge carrier separation and improve the photocatalytic performance [25][26][27][28][29][30]. Ag has been widely investigated for loading on the surfaces of various semiconductor photocatalysts due to its ability to separate the electron hole pairs by attracting the conduction band electrons as well as from economic point of view, as it is cheap as compared to other noble metals [31][32][33][34][35][36][37][38]. Taking into account the potential applications of mesoporous ZnO in terms of exploitation of harmful and toxic moieties we successfully developed, a facile one-step synthesis methodology for the preparation of mesoporous Ag/ZnO nanocrystals using triblock copolymer as structure directing agent.…”

Tungsten-based nanomaterials (WO 3 & Bi 2 WO 6 ): Modifications related to charge carrier transfer mechanisms and photocatalytic applications

“…This deflexed energy band in the space charge region facilitates the rapid transfer of excited electrons from WO 3 to metal NPs under light illumination. The electrons trapped at the A c c e p t e d M a n u s c r i p t 18 metal islands will be transferred to adsorbed oxygen to form H 2 O 2 [110]. Thus, the metal deposition cooperatively favors the charge separation, improves the light absorption properties and generates more oxidative free radicals resulting in the faster degradation of the pollutants/intermediate products.…”

Optical properties and photocatalytic activities of tungsten oxide (WO3) with platinum co-catalyst addition

“…The addition of the elements as a co-catalyst such as platinum / Pt, gold / Au and silver / Ag in the material WO3 reported to increase the activity of photocatalytic in the visible than WO3 pure [4][5][6]. Until right now, co-catalyst Pt is best able to increase the photocatalytic activity of WO3.…”