Engineering the Outermost Layers of TiO₂ Nanoparticles using in Situ Mg Doping in a Flame Aerosol Reactor
Titanium dioxide nanoparticles with disordered outermost layer sturctures have significantly enhanced light absorption and photocatalytic properties and thus receiving enhanced attention in recent years. Engineering the outermost layers using in situ magnesium doping to tailor the band-edge of TiO2 nanoparticles was achieved via a flame aerosol reactor. The distribution of doped elements in nanoparticles could be controlled in a high temperature flame process, and which could be predicted by the comparison of different characteristic time scales, such as reaction time, coagulation time, and sintering time is proposed. In situ magnesium doping on the outermost layers effectively tailored the conduction band and electron structure of the TiO2 nanoparticles, and simultaneously improved the maximum photocurrent as well as the maximum photovoltage in dye-sensitized solar cells. These improvements were largely attributed to red-shifted light absorption, and rapid photoelectron injection into the conduction band.
Y. Hu and H. Jiang and Y. Li and B. Wang and L. Zhang and C. Li and Y. Wang and T. Cohen and Y. Jiang and P. Biswas, "Engineering the Outermost Layers of TiO₂ Nanoparticles using in Situ Mg Doping in a Flame Aerosol Reactor," AIChE Journal, vol. 63, no. 3, pp. 870-880, John Wiley & Sons, Mar 2017.
The definitive version is available at https://doi.org/10.1002/aic.15451
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Aerosols; Conduction bands; Dye-sensitized solar cells; Light absorption; Nanoparticles; Oxides; Sintering; Titanium dioxide; American Institute of Chemical Engineers; Characteristic time; Enhanced light absorptions; Flame aerosol reactor; High-temperature flames; In-situ doping; Outermost layer; Titanium dioxide nanoparticles; Magnesium; In situ doping
International Standard Serial Number (ISSN)
Article - Journal
© 2017 American Institute of Chemical Engineers, All rights reserved.
01 Mar 2017