The degraded CO2 gases is methanol which can potentially as a raw material. SiO2-modified TiO2 catalyst layer made from rice husk ash, as a photoconversion of CO2 g. This photoconversion uses the photocotalistic principle in which a light (photons) activates the catalyst. The TiO2/SiO2 material is exposed to oxidize chemical species conversions with TiO2/SiO2 catalysts have a value that tends to be cheap up to 35%. photocatalyst material has great potential as a methanol converter from CO2 gases.