The invention discloses a preparation method of nano TiO2 thin-
film material. The method comprises the following steps: firstly, preparing a pure
titanium sheet into rectangular sheets of 25*15*2mm, secondly, pretreatment of the
titanium sheet: sanding,
degreasing, hydrochloric acidizing fluid rinsing, ultrasonic deionized
water washing and
vacuum drying, thirdly, laying the pretreated
titanium sheet on micro-arc oxidation equipment, so as to be conducted to micro-arc oxidation, taking the titanium sheet as
anode to be dipped into treating fluid and a stainless steel container with a cooling
system as
cathode, and fourthly, performing deionized
water washing and
drying to an obtained nano TiO2 thin-film, and then performing
ion dipping to the thin-film, wherein experiment parameters are as follows:
voltage is 420V, the preparation time is 30min, the content of Na3PO4 in a
phosphate electrolyte system is 10g / L, the content of NaF is 1g / L, and the electrolyzing temperature is controlled to be below 35 DEG C. The method has the advantages that the
photocatalytic degradation rate of the nano TiO2 thin-film exceeds 50 percent, the
raw material is
chip and common, the technology is simple, the cost is low, and the method is beneficial to industrial production.