Self-assembly TiO2-RGO/LDHs nanocomposite: Photocatalysis of VOCs degradation in simulation air

In this work, the TiO2-RGO/LDHs photocatalyst was synthesized by a hydrothermal method using GO/LDHs as substrates. The structure and property of prepared materials were characterized via XRD, SEM, EDS, XPS, TEM, UV-vis spectroscopy, etc. Toluene, methanol, and ethyl acetate were selected as typical volatile organic pollutants model pollutants to examine the photocatalytic degradation effect of TiO2-RGO/LDHs. The photocatalytic efficiency of the TiO2-RGO/LDHs system was further investigated in contaminated air (NOx = 20 ppm). The results indicated that the prepared TiO2-RGO/LDHs nanocomposite possess better photodegradation activity than pure TiO2 and TiO2-RGO samples, and the photocatalyst has excellent application for the elimination of three kinds of VOCs. The photochemical and materials characterization revealed that the graphene has enlarged the light response range and inhibited the recombination of electron-hole pairs of TiO2. Meanwhile, LDHs can offer more hydroxide ions to accelerate the oxidation reaction, resulting in more radicals and better pollutants degradation.

Automated summary

The TiO2-RGO/LDHs photocatalyst was synthesized using a hydrothermal method and its application in degrading volatile organic pollutants was studied. The results showed that the photocatalyst had good degradation activity, with graphene and LDHs playing important roles.