Abstract
The photocatalysis process for volatile organic compounds (VOCs) such as formaldehyde is considered a potential strategy due to its high efficiency and low cost. In this study, TiO2 was co-modified by the addition of sulfur (S), nitrogen (N), and reduced graphene oxide (rGO) under a solvothermal method for its enhancement on formaldehyde degradation. Characterization analysis of the modified TiO2 displayed an average particle size of 9.37 nm and was totally composed of anatase phase. The photocatalyst of 0.1rGO/S0·05N0·1TiO2 performed efficient visible-light-driven photocatalytic activity of formaldehyde conversion under the range of 10–60% relative humidity due to lower water adsorption competition and pores blocking. The addition of rGO, S, and N increased specific surface area, light absorption, bonding of oxygen-containing functional groups, and electron transfer capacity which are critical factors in photocatalysis activity.
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