Method for preparing nano TiO2

A nano, aqueous solution technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, titanium oxide/hydroxide, etc., can solve the problems of waste of resources, environmental pollution of waste water, environmental pollution, etc. Achieve the effect of reducing water and energy consumption, good suspension performance and good monodispersity

Active Publication Date: 2014-09-24
NINGBO NANOJP NEW MATERIAL TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These washing methods will consume a lot of water, and the waste water produced will easily cause environmental pollution; at the same time, the ions in the washing process are not easy to recover, which will pollute the environment and cannot realize the comprehensive and effective utilization of resources.
For example, patents CN1733846A and CN101554580A both use titanyl sulfate and ammonia water as reaction raw materials, and their multiple washing processes waste a lot of water resources, consume a lot of manpower, material and financial resources, and fail to effectively recycle sulfate and ammonium ions. Cause environmental pollution and waste of resources
Patent CN101773820A uses titanyl sulfate and ammonia water as reaction raw materials, and its washing process adopts the method of electrodialysis, which consumes a lot of electric energy, wastes sulfate and ammonium ions, and fails to realize the comprehensive utilization of resources

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  • Method for preparing nano TiO2
  • Method for preparing nano TiO2
  • Method for preparing nano TiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 As shown, under stirring at normal temperature and pressure, 5 ml of titanium isopropoxide was slowly added dropwise to 20 ml of pure water to obtain a white hydrated titanic acid precipitate suspension. After standing still for 1 hour, the hydrated titanic acid precipitate was separated by filtration to obtain a hydrated titanic acid precipitate and a clear aqueous solution of isopropanol. At this point, the aqueous solution of isopropanol can be directly recovered. Add 200 ml of 3% hydrogen peroxide aqueous solution to the separated hydrated titanic acid precipitate, and stir for 2 hours to form a titanium complex aqueous solution. Take the above-mentioned 80 milliliters of titanium complex aqueous solution in a 100 milliliter hydrothermal kettle, and react hydrothermally at 110 degrees Celsius for 4 hours to obtain nano-TiO with small particle size, high crystallinity, monodisperse and suspended anatase phase. 2 Dispersions. The above-mentioned is...

Embodiment 2

[0054] Under normal temperature and pressure stirring, 5 ml of tetrabutyl titanate was slowly added dropwise to 20 ml of pure water to obtain white hydrated titanic acid precipitate. After standing still for 1 hour, the hydrated titanic acid precipitate was separated by filtration to obtain hydrated titanic acid precipitate and n-butanol aqueous solution. Add 200 ml of 4% hydrogen peroxide aqueous solution to the separated hydrated titanic acid precipitate, and stir for 3 hours to form a titanium complex aqueous solution. Take the above-mentioned 80 ml titanium complex aqueous solution in a 100 ml hydrothermal kettle, and conduct a hydrothermal reaction at 120 degrees Celsius for 3 hours to obtain a small particle size, high crystallinity, monodisperse, suspended anatase phase nano-TiO 2 Dispersions. The n-butanol in the above-mentioned n-butanol aqueous solution was purified by a method combining liquid separation and distillation to obtain n-butanol with a concentration of ...

Embodiment 3

[0056] Under stirring at normal temperature and pressure, 5 ml of titanium isopropoxide was slowly added dropwise to 20 ml of pure water to obtain a white hydrated titanic acid precipitate. After standing still for 1 hour, the hydrated titanic acid precipitate was separated by filtration to obtain a hydrated titanic acid precipitate and a clear isopropanol aqueous solution. Add 200 ml of 3% hydrogen peroxide aqueous solution to the separated hydrated titanic acid precipitate, and stir for 2 hours to form a titanium complex aqueous solution. Take the above-mentioned small amount of titanium complex aqueous solution and spray it on the silicon wafer, after natural drying, anneal treatment at 200 degrees Celsius for 2 hours to obtain nano-TiO supported on the silicon wafer. 2 catalyst of light. The above-mentioned isopropanol aqueous solution is heated and distilled, and purified to obtain high-concentration isopropanol.

[0057] Please refer to Figure 5 , it can be seen that...

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Abstract

The application discloses a method for preparing nano TiO2. The method comprises the following steps: hydrolyzing titanium alkoxide directly so as to form hydrated titanic acid precipitate and a water solution of alcohol; separating the hydrated titanic acid precipitate from the water solution of alcohol so as to obtain the hydrated titanic acid precipitate and recycle the water solution of alcohol; adding a hydrogen peroxide solution into the obtained hydrated titanic acid precipitate so as to obtain a titanium complex solution or titanium complex colloid; and carrying out hydrothermal reaction on the titanium complex solution or the titanium complex colloid to obtain a nano TiO2 dispersion solution or coating to obtain a supported nano TiO2 photocatalyst. The method for preparing nano TiO2 also can be used for separating and recycling alcohol so as to comprehensively utilize raw materials.

Description

technical field [0001] The invention relates to a preparation method of a photocatalytic material, in particular to a method for preparing nano-TiO 2 Methods. Background technique [0002] Titanium dioxide (TiO 2 ) has attracted extensive attention from industry and scientific research circles due to its rich sources, non-toxicity, and good stability. Recently, anatase TiO 2 Considered as one of the most ideal photocatalytic materials, it is widely used in photocatalytic air purification and photocatalytic water treatment. Anatase phase TiO 2 The photocatalytic efficiency is closely related to its size, morphology, degree of dispersion, crystallinity, etc. Generally speaking, small particle size has a large specific surface area, which can absorb more organic matter and show higher photocatalytic efficiency; the same , the greater the degree of dispersion of the particles, the more conducive to the improvement of photocatalytic efficiency. [0003] At present, the synt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/52B01J23/50B01J23/42B01J23/72B01J23/745B01J23/755B01J23/34B01J23/22B01J23/26B01J23/20B01J23/10C01G23/053
Inventor 李建明
Owner NINGBO NANOJP NEW MATERIAL TECH CO LTD
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