▎ 摘　　要

NOVELTY - Preparing Schiff base sensitized graphene composite titanium dioxide photo-catalyst involves selecting nano titanium oxide powder is Degussa P25, mixing the nano titanium oxide powder with de-ionized water, high speed dispersing for 0.5-1.5 hours by emulsifying machine to prepare 5-10% suspension, using acetic acid to adjust the pH of suspension to 4-6, then adding silane coupling agent KH550 accounting for 5-15% mass of the nanometre titanium oxide powder, reacting for 1-3 hours at 80-100degrees Celsius to obtain the nanometre titanium oxide suspension, preparing graphene oxide suspension by Hummers method, by ultrasonic processing in the de-ionized water to obtain stable graphene oxide water dispersion, the concentration is 5mg/mL, taking 20mL GO aqueous solution, 1 g silane coupling agent KH550 into absolute ethyl alcohol, stirring to make it dissolve, adding into GOs water solution. USE - Method for preparing Schiff base sensitized graphene composite titanium dioxide photo-catalyst. ADVANTAGE - The method has obviously improved removing effect of gaseous formaldehyde and removing efficiency of formaldehyde in 48 hours is 89%. DETAILED DESCRIPTION - Preparing Schiff base sensitized graphene composite titanium dioxide photo-catalyst involves selecting nano titanium oxide powder is Degussa P25, mixing the nano titanium oxide powder with de-ionized water, high speed dispersing for 0.5-1.5 hours by emulsifying machine to prepare 5-10% suspension, using acetic acid to adjust the pH of suspension to 4-6, then adding silane coupling agent KH550 accounting for 5-15% mass of the nanometre titanium oxide powder, reacting for 1-3 hours at 80-100degrees Celsius to obtain the nanometre titanium oxide suspension, preparing graphene oxide suspension by Hummers method, by ultrasonic processing in the de-ionized water to obtain stable graphene oxide water dispersion, the concentration is 5mg/mL, taking 20mL GO aqueous solution, 1 g silane coupling agent KH550 into absolute ethyl alcohol, stirring to make it dissolve, adding into GOs water solution, ultrasonically processing for 30 minutes, stirring for 10 minutes, using acetic acid to adjust the pH of the solution to 4-5, then reacting for 0.5-1 hours in water bath at 50degrees Celsius, raising the temperature to 70degrees Celsius, continuously reacting for 0.5-1 hours to obtain the graphene oxide suspension, mixing nano titanium oxide suspension and graphene oxide suspension according to mass ratio of 1:1, then slowly dropping 50% mass fraction of the ethanol solution of terephthalaldehyde, reacting for 1-2 hours at 60-80degrees Celsius to obtain product.