Unlock instant, AI-driven research and patent intelligence for your innovation.

Hydrothermal synthesis method of double-phase titanium dioxide

A hydrothermal synthesis, titanium dioxide technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of complex preparation methods, high temperature requirements, high equipment requirements, etc., and achieve high photocatalytic energy efficiency and activity High, stable and good effect

Active Publication Date: 2020-11-03
YANCHENG INST OF TECH
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Two-phase titanium dioxide with both anatase and rutile crystal forms has been prepared in the prior art, such as Degussa P25, P25 nano-titanium dioxide belongs to the mixed crystal form, and the weight ratio of anatase and rutile is about 80 / 20. Its catalytic effect is greatly improved compared with a single crystal form of titanium dioxide, but it is still not enough, and P25 is obtained by chemical vapor deposition method through hydrogen flame combustion of titanium tetrachloride, and the preparation method is complicated. High requirements, high temperature requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrothermal synthesis method of double-phase titanium dioxide
  • Hydrothermal synthesis method of double-phase titanium dioxide
  • Hydrothermal synthesis method of double-phase titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A hydrothermal synthesis method of dual-phase titanium dioxide, comprising the steps of:

[0027] (1) Get 5mmol titanium potassium oxalate and dissolve into the mixed solution that mass concentration is 30% hydrogen peroxide solution and water form, and described mixed solution volume is 50mL, wherein, mass concentration is the volume of 30% hydrogen peroxide solution to 0 mL, stir to completely dissolve potassium titanium oxalate, then add 1.6 mL of nitric acid solution with a mass concentration of 65%, and continue to stir evenly to obtain a precursor solution;

[0028] (2) Transfer the precursor solution to a polytetrafluoroethylene-lined stainless steel reactor with a volume of 150 mL, and then place it in an oven for hydrothermal synthesis reaction. The temperature of the hydrothermal synthesis reaction is 150 ° C, and the time is 13 h. After the reaction, cool to room temperature, wash the product with water and absolute ethanol five times, then dry at 70°C overni...

Embodiment 2

[0031] In the mixed solution of step (1), the volume of the hydrogen peroxide solution with a mass concentration of 30% is 5 mL. All the other are identical with embodiment 1. The obtained dual-phase titanium dioxide powder is denoted as b.

Embodiment 3

[0033] In the mixed solution of step (1), the volume of the hydrogen peroxide solution with a mass concentration of 30% is 10 mL. All the other are identical with embodiment 1. The obtained dual-phase titanium dioxide powder is denoted as c.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
photodegradationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a hydrothermal synthesis method of double-phase titanium dioxide, which comprises the following steps: dissolving 5-5.5 mmol of titanium potassium oxalate into a mixed solution formed by a hydrogen peroxide solution with the mass concentration of 30% and water, stirring the solution to completely dissolve, adding a nitric acid solution, and stirring the solution uniformlyto obtain a precursor solution; transferring the precursor solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, then putting the stainless steel reaction kettle intoa drying oven for hydrothermal synthesis reaction, cooling the reaction product to room temperature, washing the product with water and absolute ethyl alcohol respectively, and then drying and grinding the product to obtain a crude product; and calcining the crude product, and cooling the product to room temperature to obtain the biphasic titanium dioxide powder. The method is simple and easy to implement, green and low in consumption, and the prepared two-phase titanium dioxide is adjustable in crystal form, high in photocatalysis energy efficiency, high in activity and good in stability.

Description

technical field [0001] The invention relates to a hydrothermal synthesis method of two-phase titanium dioxide, which belongs to the technical field of photocatalyst preparation. Background technique [0002] In recent years, with the increasing environmental pollution, it is imperative to seek a green, efficient, safe and economical environmental governance method. Photocatalytic technology degrades pollutants by using clean and harmless sunlight, and has simple operation, low energy consumption, no secondary pollution, and high efficiency. Among various semiconductor photocatalysts, TiO 2 It has the characteristics of good chemical and thermal stability, high corrosion resistance, non-toxicity, abundant resources, and low cost, making it have a good application prospect in environmental purification. [0003] TiO 2 It is a polymorphic compound with three crystal forms of rutile, anatase and brookite. The band gaps of different crystal forms of titanium dioxide are also ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B01J21/06B01J35/00
CPCC01G23/047B01J21/063C01P2002/72C01P2002/30C01P2004/82B01J35/39Y02P20/10
Inventor 王矿卓炎祁珍明王春霞高大伟马志鹏刘国亮陆振乾季朱玉赵鸣唐亚林
Owner YANCHENG INST OF TECH