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To increase the utilization ratio and catalytic efficiency of the nano TiO 2 , The RGO/TiO 2 /(Ag) powders and RGO/TiO 2 /Ag aerogel photocatalyst were designed and prepared. The composition and microstructure of RGO/TiO 2 /(Ag) powders and RGO/TiO 2 /Ag aerogel were studied, in addition, the photocatalytic activity of RGO/TiO 2 /(Ag) powders and RGO/TiO 2 /Ag aerogel was researched by the photocatalytic degradation behavior of formaldehyde solution and formaldehyde gas respectively. The result indicate that TiO 2  is uniformly loaded on the surface of RGO with a particle size of 10 nm to 20 nm. When the amount of graphene oxide added is 1 wt%, RGO/TiO 2  powder has the highest degradation effect on formaldehyde solution, in addition, the introduction of Ag can greatly improve the photocatalytic effect of the sample. The results also show that the pore size of RGO/TiO 2 /Ag aerogel is between 7.6 nm and 12.1 nm, and the degradation rate of formaldehyde gas is 77.08% within 2 hours.

Preparation of RGO/TiO2/Ag Aerogel and Its Photodegradation Performance in Gas Phase Formaldehyde