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Mars-van-Krevelen mechanism-based blackening of nano-sized white semiconducting oxides for synergetic solar photo-thermocatalytic degradation of dye pollutants.
Nanoscale
February 2020
Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P.R. China. and University of Science and Technology of China, Hefei 230026, PR China.
Blackening (or enhancing the optical absorption in the visible region) of nano-sized white semiconducting oxides (N-WSOs) is of significant importance for solar utilization. Here, we present a novel Mars-van-Krevelen mechanism-based method for blackening the N-WSOs via facile one-step heating of the N-WSOs with alcohols. Taking n-butanol-induced blackening of TiO (anatase) as an example, the pristine TiO NP powders can be successfully blackened to form black TiO (B-TiO) via heating with n-butanol at 300 °C for 20 min.
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