Preparation method for metal oxide modified nano-TiO2 film material

Abstract

The invention discloses a preparation method for a metal oxide modified nano-TiO2 film material. The method comprises the following steps: (1) a pure titanium sheet is prepared to a rectangular sheet with dimensions of 25 mm*15 mm*2 mm; (2) the titanium sheet is pretreated through sanding, oil removing, hydrochloric acid liquid rinsing, ultrasonic de-ionized water cleaning and vacuum drying; (3) the pretreated titanium sheet is placed on micro-arc oxidization equipment; the experiment parameters are as follows: the voltage is 420 V; the preparation time is 30 min; the concentration of Na3PO4 in a phosphate electrolyte system is 10 g / L; the concentration of NaF is 1 g / L; the electrolytic temperature is controlled below 35 DEG C; then 2-20 mmol metal oxide is added in the electrolyte, and is reacted under the magnetic stirring so as to synchronously implement the doping and the micro-arc oxidization, wherein the titanium sheet as anode is dipped in treating agent; and a stainless steel vessel provided with a cooling system is used as cathode; and (4) the prepared nano-TiO2 film is rinsed by de-ionized water and is dried. The nano-TiO2 film prepared by the method has high photocatalytic degradation rate, and brings convenience to industrial production.

Description

technical field [0001] The present invention relates to a kind of nano TiO 2 Thin film materials, especially a composite nano-TiO 2 Preparation method of thin film material. Background technique [0002] Among many semiconductor photocatalysts, TiO 2 Because of its strong oxidation ability, good chemical stability, high catalytic activity, and non-toxicity, it is at the core of photocatalytic research. As a semiconductor material, nano-titanium dioxide is non-toxic, cheap, high-activity, and high-stability. And other characteristics are widely used in self-cleaning, environmental pollution control and other fields. However, the preparation of nano-TiO 2 The method of this method generally has defects such as high cost, difficult control of the process, and unfavorable recovery and easy-to-lose granular powder of the obtained product. Unable to satisfy people's demand for high-quality TiO 2 Practical needs for photocatalysts. At present, nano-TiO in the form of thin fi...

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Problems solved by technology

However, the preparation of nano-TiO 2 The method generally has defects such as high cost, difficult process control, unfavorable recycling, and easily lost granular powder.

Unable to satisfy people's demand for high-quality TiO 2 Practical needs of photocatalysts

At present, nano-TiO in the form of thin films 2 Photocatalysts have gradually replaced granular nano-TiO 2 It has become the focus of people's early research. Compared with the granular state, the thin film state has a firm combination and no loss, but it is inferior to the granular nano-TiO in terms of catalytic activity. 2 (When the film is attached, the specific surface area is reduced and the reaction area is also reduced)

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