Hydrogenated titanium dioxide nanotube/nano-particle composite photocatalytic material and preparation method thereof

A technology of hydrogenating titanium dioxide and nanoparticles, which is applied in the field of photocatalytic materials, can solve the problems of low visible light catalytic activity, etc., and achieve the effects of high photocatalytic activity, simple and easy preparation method, and high external surface area.

Active Publication Date: 2014-06-25
NATURAL ENERGY INST GANSU ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of titanium dioxide nanotube / nanoparticle photocatalytic composite material with surface hydrogenation treatment, to solve the problem of low visible light catalytic activity of titanium dioxide

Method used

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  • Hydrogenated titanium dioxide nanotube/nano-particle composite photocatalytic material and preparation method thereof
  • Hydrogenated titanium dioxide nanotube/nano-particle composite photocatalytic material and preparation method thereof
  • Hydrogenated titanium dioxide nanotube/nano-particle composite photocatalytic material and preparation method thereof

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Embodiment 1

[0026] Add 1.0 g of titanium dioxide nanoparticles into 80 mL of 10 M NaOH solution, ultrasonically disperse for 30 min, and then stir for 3 h in the dark. Then put it in a hydrothermal reaction kettle for hydrothermal reaction at 120°C for 24 hours. After cooling to room temperature, wash it with deionized water to neutrality, then wash it with 0.02M HCl solution until the pH value is 3, and then wash it with deionized water. Wash with water until neutral, and dry the solid product in a drying oven at 80°C. The dried solid was ground with an agate mortar and placed in a quartz boat in a quartz tube furnace, then the quartz boat was placed in the quartz tube, and a mixed gas of hydrogen / nitrogen was continuously introduced at a flow rate of 300 mL / min (mixed In gas, H 2 The volume fraction is 10%, N 2 The volume fraction is 90%), the tube furnace was raised to 500 °C at a rate of 5 °C / min, and calcined for 3 h. Stop feeding the mixed gas after the tube furnace is cooled to ...

Embodiment 2

[0028] Add 0.5g of titanium dioxide into 60mL of 9M NaOH solution for ultrasonic dispersion for 60min, and stir in the dark for 4h; put it in a hydrothermal reaction kettle for hydrothermal reaction at 170°C for 24h, after cooling to room temperature, wash with deionized water to medium Then wash with 0.03M HCl solution until the pH value is 3, then wash with deionized water until neutral, and dry the solid product in a drying oven at 80°C. The dried solid was ground with an agate mortar and placed in a quartz boat in a quartz tube furnace, then the quartz boat was placed in the quartz tube, and a mixed gas of hydrogen / nitrogen was continuously introduced at a flow rate of 200 mL / min (mixed In gas, H 2 The volume fraction is 20%, N 2 The volume fraction is 80%), and the tube furnace is raised to 450°C at a rate of 10°C / min, calcined for 3 hours, and the mixed gas is stopped after the tube furnace is cooled to 100°C, and the product is hydrogenated titanium dioxide nanometer ...

Embodiment 3

[0030] Add 1.5g of titanium dioxide into 100mL of 10M NaOH solution for ultrasonic dispersion for 45min, and stir in the dark for 5h; place it in a hydrothermal reaction kettle for hydrothermal reaction at 150°C for 48h, cool to room temperature, and wash with deionized water to medium After washing with 0.05M HCl solution until the pH value is 3, and then washing with deionized water until neutral, the solid product is dried in a drying oven at 100°C. The dried solid was ground with an agate mortar and placed in a quartz boat in a quartz tube furnace, then the quartz boat was placed in the quartz tube, and a mixed gas of hydrogen / nitrogen was continuously introduced at a flow rate of 180 mL / min (mixed gas Medium, H 2 The volume fraction is 10%, N 2 The volume fraction is 90%), and the tube furnace is raised to 400°C at a rate of 5°C / min, calcined for 6h, and the mixed gas is stopped after the tube furnace is cooled to 100°C, and the product is hydrogenated titanium dioxide n...

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Abstract

The invention provides a preparation method of a titanium dioxide nanotube/nano-particle composite photocatalytic material with a hydrogenated surface. The preparation method comprises the following steps of adding titanium dioxide into a NaOH solution, ultrasonically dispersing and stirring the titanium dioxide and the NaOH solution in a dark place, carrying out the hydrothermal reaction, cooling, washing and drying to obtain a solid product; grinding the solid product, placing the ground product into a quartz tubular furnace, introducing hydrogen-nitrogen mixed gas, and heating the to 400 to 600 DEG C, sintering the ground product for 1h to 6h; stopping the introduction of the mixed gas when the tubular furnace is cooled to 100DEG C to obtain the hydrogenated titanium dioxide nanotube/nano-particle photocatalysis composite material. The photocatalysis material is compounded of hydrogenated cavity titanium dioxide nanotube and titanium dioxide nano particles, so that the outer surface area is high, the cavity nanotube which easily adsorbe hydrogen is provided, the hydrogenation is easily realized, and therefore the photocatalytic activity is higher; in addition, the titanium dioxide nanotube/nano-particle composite photocatalytic material not only can be used for treating phenol pollutants in the water, but also can be used for treating dye and phenolic derivatives.

Description

technical field [0001] The invention relates to the preparation of a titanium dioxide photocatalytic composite material, in particular to a preparation method of a surface hydrogenated titanium dioxide nanotube / nanoparticle composite photocatalytic material, which belongs to the technical field of photocatalytic materials. Background technique [0002] Titanium dioxide, a semiconductor material, can completely degrade organic matter in the environment into water and carbon dioxide under ultraviolet light. It has the advantages of stable chemical properties, good acid and alkali resistance, non-toxicity, low cost, and good catalytic performance. It is the most widely used one. catalyst of light. However, because titanium dioxide is a semiconductor with a wide energy gap, it has a low response to visible light and can only absorb 3% of the ultraviolet light in sunlight, and the recombination probability of photogenerated electrons and holes in titanium dioxide is relatively hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B82Y30/00C02F1/30
Inventor 韩立娟安兴才刘刚陈作雁
Owner NATURAL ENERGY INST GANSU ACAD OF SCI
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