New insights into self-modification of mesoporous titania nanoparticles for enhanced photoactivity: effect of microwave power density on formation of oxygen vacancies and Ti³⁺ defects

Abstract

Mesoporous titania nanoparticles (MTN) were successfully prepared by a microwave (MW)-assisted method under various power densities.

Unbiased spontaneous solar hydrogen production using stable TiO2–CuO composite nanofiber photocatalysts

“…3b, for both A1 and A4 samples, two peaks were recorded at 458.3 and 463.7 eV related to Ti 2p 3/2 and Ti 2p 1/2 , respectively. 29 Upon deconvolution, a small peak was recorded at 456.2, which suggests the formation of Ti 3+ species 25,30 that have been conrmed via EPR analysis. Electron paramagnetic resonance (EPR) analysis was performed for the sample A1 to conrm the presence of Ti 3+ species, and the coordination of the Cu 2+ in the frame work of TiO 2 , as shown in Fig.…”

Synthesis of Mesoporous Nanoparticles via Microwave-Assisted Method for Photocatalytic Degradation of Phenol Derivatives

“…Generally, the MTN required energy larger or equal than 387.5 nm to excite the electron from the valance band (VB) to the conduction band (CB). However, the presence of TSD and OV allowed the electrons to excite from VB to TSD and OV as well as from TSD and OV to CB [19]. Their presence not only facilitates the electrons excitation but also allowed the photoactivity undergoes under visible light irradiation since the electrons can be excited from VB, TSD and OV.…”

“…Through (MW)-assisted process, the efficiency of these photocatalysts can be enhanced since this method to increase their porosity and generate numerous site defects which are TSD and OV for MTN and OV for MZN [15][16][17][18][19]. Microwave is an essential appliance practically in most kitchens.…”

The Photocatalytic and Antibacterial Performance of Nitrogen-Doped TiO2: Surface-Structure Dependence and Silver-Deposition Effect

“…Meanwhile, the incorporation of noble metals (such as Au, Ag, Pt, Cu, and Pd) onto the surface of N-TiO 2 is also a favorable strategy to overcome the problem of fast recombination of the photo-generated electron-hole pairs and to improve the charge transfer [ 6 , 7 , 8 , 9 ]. Among them, Ag is the most suitable candidate for industrial applications due to its relatively low cost and easy preparation [ 10 , 11 , 12 ].…”