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Preparation method and application of metal-doped titanium dioxide material

A titanium dioxide and metal doping technology, which is applied in chemical instruments and methods, textile industry wastewater treatment, water/sludge/sewage treatment, etc., can solve the problems of low solar energy utilization efficiency, difficulty in recycling, waste of resources and cost, etc. , to achieve good photodegradability, good application potential, cost and resource savings

Active Publication Date: 2015-06-03
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The degradation of organic pollutants by photocatalytic technology has attracted much attention due to its fast reaction speed and wide application range. Especially for refractory organic pollutants, photocatalytic technology has more obvious advantages. Titanium dioxide is currently widely used Due to the thorny problems in the application of photocatalytic semiconductor materials, it is urgent to seek some breakthrough points. For example, titanium dioxide has a wide energy band, can only absorb ultraviolet light, and has low utilization efficiency of solar energy.
At the same time, the traditional titanium dioxide powder forms a suspension system in the liquid phase, which makes separation difficult, difficult to recycle and reuse, and wastes resources and costs.

Method used

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  • Preparation method and application of metal-doped titanium dioxide material
  • Preparation method and application of metal-doped titanium dioxide material
  • Preparation method and application of metal-doped titanium dioxide material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: the preparation of pure titanium dioxide

[0031] First, tetrabutyl titanate and absolute ethanol were mixed at a volume ratio of 1:4, and stirred evenly at room temperature; after continuous stirring for 2 hours, the solution was put into a drying dish containing 1.0 g / mL potassium carbonate aqueous solution at the bottom, After 10 days, the mixture forms a gel, and then dried in an oven at 80°C for 12 hours. After cooling, the obtained particles were first washed with absolute ethanol, then washed once with distilled water, dried at 100°C after centrifugation, and then placed in a tube furnace Raise the temperature to 500°C at a rate of 5°C / min, continue to feed air, calcine for 3 hours, and then naturally cool to room temperature to obtain pure titanium dioxide particles. figure 1 It can be seen from the scanning electron microscope image that the average particle size of the nanomaterial is about 20nm; image 3 According to its XRD pattern, it can be ...

Embodiment 2

[0032] Embodiment 2: The molar ratio is the preparation of 2.0% tungsten-doped titanium dioxide

[0033] First, tetrabutyl titanate and absolute ethanol are mixed in a volume ratio of 1:4, and stirred evenly at room temperature; then 0.5wt% ethanol solution of tungsten chloride is added to make the molar ratio of tungsten and titanium to 2.0%, forming Mixed solution doped with ions; after stirring continuously for 2 hours, put the solution into a drying dish filled with 600 mg / mL potassium carbonate aqueous solution at the bottom, after 5 days, the mixed solution forms a gel, and then dry it in an oven at 80°C for 12 hours, cool The obtained particles were first washed with absolute ethanol, then washed once with distilled water, dried at 100°C after centrifugation, and then placed in a tube furnace to raise the temperature to 500°C at a rate of 5°C / min, continue to feed air, and calcined for 3 hours After cooling naturally to room temperature, the molar ratio of 2.0% tungsten...

Embodiment 3

[0034] Embodiment 3: the molar ratio is the preparation of 0.02% manganese-doped titanium dioxide

[0035] First, tetrabutyl titanate and absolute ethanol are mixed at a volume ratio of 1:4, and stirred evenly at room temperature; then 0.05wt% ethanol solution of manganese acetate is added to make the molar ratio of manganese and titanium 0.02%, forming ions Doped mixed solution; after continuous stirring for 2h, the solution was put into a dry dish filled with 600g / mL potassium carbonate aqueous solution at the bottom. After 5 days, the mixture formed a gel, and then dried in an oven at 80°C for 12 hours. After cooling, the obtained particles were first washed with absolute ethanol, then washed once with distilled water, dried at 100°C after centrifugation, and then placed in a tube furnace. The temperature was raised to 500°C at a rate of 5°C / min, air was continuously introduced, and after calcination for 3 hours, it was naturally cooled to room temperature to obtain titaniu...

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Abstract

The present invention discloses a metal-doped titanium dioxide material preparation method, which comprises: uniformly mixing tetrabutyl titanate and dehydrated alcohol; adding a metal salt to the system, wherein a molar ratio of metal salt ions to titanium ions is 0.0001-0.2; placing the formed homogeneous solution into an environment with a certain humidity for a plurality of days to form a gel; and carrying out a calcination treatment to obtain the metal-doped titanium dioxide material. The preparation method has characteristics of simpleness, reliability and easy operation, wherein the disadvantage that the conventional sol-gel method requires acid addition to control hydrolysis is avoided. The obtained material has good photocatalysis property, and is uniform fine particles, wherein the particles are easily separated in the liquid phase, are easily recycled, provide good photodegradation effects for pollutants, and have good potential applications.

Description

technical field [0001] The invention discloses a preparation method of a metal-doped titanium dioxide material and an application of the prepared product. Background technique [0002] The degradation of organic pollutants by photocatalytic technology has attracted much attention due to its fast reaction speed and wide application range. Especially for refractory organic pollutants, photocatalytic technology has more obvious advantages. Titanium dioxide is currently widely used Due to some thorny problems in the application of photocatalytic semiconductor materials, it is urgent to seek some breakthrough points, such as titanium dioxide, which has a wide energy band, can only absorb ultraviolet light, and has low utilization efficiency of solar energy. At the same time, the traditional titanium dioxide powder forms a suspended system in the liquid phase, which makes separation difficult, difficult to recycle and reuse, and wastes resources and costs. Contents of the invent...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J23/32B01J23/20B01J23/50C02F1/32C02F1/62C02F101/22C02F101/30C02F103/30
Inventor 祝建中陈胜鲁曹阳朱瑞瑞丁莹季敏
Owner HOHAI UNIV
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