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Method for preparing titanium dioxide/bamboo charcoal composite material

A composite material and titanium dioxide technology, which is applied in chemical instruments and methods, oxidized water/sewage treatment, chemical/physical processes, etc., can solve the problems of reduced photocatalytic efficiency, low utilization rate of light energy, and difficulty in recycling, etc. Catalytic performance, reduced production cost, uniform size distribution effect

Inactive Publication Date: 2010-01-27
LONGYAN UNIV
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Problems solved by technology

[0002] Nano-titanium dioxide is widely used as a photocatalyst in the field of photocatalytic oxidation treatment of wastewater due to its stable chemical properties, high efficiency, and low cost. Due to the low utilization rate of light energy and other problems, this new technology has not been popularized and applied in industrial production; bamboo charcoal has become a very Catalyst carrier with application prospects, using bamboo charcoal as a carrier to prepare nano-titanium dioxide composite materials, can organically combine the adsorption performance of bamboo charcoal and nano-titanium dioxide photocatalytic activity, give full play to the advantages of the two materials, not only can reduce the amount of titanium dioxide, but also Reduce preparation cost and use cost, solve problems such as difficulty in recycling in wastewater treatment
Regarding the preparation method of titanium dioxide / bamboo charcoal composite material, Journal of Nanjing Forestry University (Natural Science Edition, 2008, 32, Zhou Jianbin, Deng Congjing, Fu Jinhe, Zhang Qisheng) discloses a method of loading titanium dioxide on bamboo charcoal by impregnation. By using the purchased nano-titanium dioxide as raw material, adding stabilizers and dispersants to make a precursor slurry, drying at 110°C to 350°C after impregnation, and forming the outermost photocatalyst layer on the surface of bamboo charcoal; this method has the following defects The first is that the raw material is expensive, the preparation time is long, and the cost is high; the second is that nano-titanium dioxide is easy to agglomerate and difficult to disperse, and the content of titanium dioxide is difficult to control and can only form a photocatalyst layer on the surface of bamboo charcoal, so it is difficult to prepare a uniform titanium dioxide / bamboo charcoal composite material , which reduces the photocatalytic efficiency; Journal of Zhejiang Forestry University (2007, 24, Luo Xiping, Fu Shenyuan, Zhou Chunhui) disclosed another method for loading titanium dioxide on bamboo charcoal, that is, the sol-gel-impregnation method, which uses titanium Tetrabutyl tetrabutylate is used as the titanium source. Bamboo charcoal is added after the sol is generated under acidic conditions, filtered, dried, and roasted under nitrogen protection; It will also affect the escape of organic reagents, and it is easy to cause carbon pollution in the drying and sintering process

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  • Method for preparing titanium dioxide/bamboo charcoal composite material

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Effect test

Embodiment 1

[0013] Using bamboo charcoal and tetra-n-butyl titanate as raw materials, titanium dioxide / bamboo charcoal composites were prepared by microwave-assisted method. The specific implementation steps are:

[0014] 40-mesh bamboo charcoal was selected by the 8411A electric vibrating sieve machine, soaked in dilute acid for 24 hours, washed repeatedly with distilled water until neutral, and dried in an oven for later use.

[0015] Mix absolute ethanol, tetra-n-butyl titanate, and glacial acetic acid at a volume percentage of 56%:34%:10%, and stir for 10 minutes to obtain solution A; weigh 5 g of bamboo charcoal and mix it with 58 mL of solution A, and continue stirring for 30 minutes to obtain Mixture B; measure 90% ethanol by volume, and adjust the pH of the solution to 2.5 with dilute nitric acid to obtain solution C; pour 20mL of solution C into the pear-shaped dropping funnel, adjust the plunger of the dropping funnel to make the solution C was added dropwise to the mixture B s...

Embodiment 2

[0019] The 60-mesh bamboo charcoal was selected by the 8411A electric vibrating sieve machine, soaked in dilute acid for 24 hours, washed repeatedly with distilled water until neutral, and dried in an oven for later use.

[0020] Mix absolute ethanol, tetra-n-butyl titanate, and glacial acetic acid by volume percentage at 60%:32%:8%, and stir for 10 minutes to obtain solution A; weigh 5 g of bamboo charcoal and mix it with 60 mL of solution A, and continue stirring for 30 minutes to obtain Mixture B; measure 90% ethanol by volume, and adjust the pH=2.7 of the solution with dilute nitric acid to obtain solution C; pour 22mL of solution C into the pear-shaped dropping funnel, adjust the plunger of the dropping funnel to make the solution C was added dropwise to the mixture B stirred at a constant speed at a rate of 1 drop / s-2 drops / s, and the entire dropping process was controlled within 40 minutes.

[0021] Pour the mixture into three equal parts into dry polytetrafluoroethylen...

Embodiment 3

[0024] 100-mesh bamboo charcoal was selected by the 8411A electric vibrating sieve machine, soaked in dilute acid for 24 hours, washed repeatedly with distilled water until neutral, and dried in an oven for later use.

[0025] Anhydrous ethanol, tetra-n-butyl titanate, and glacial acetic acid were mixed at a ratio of 58%:33%:9% by volume, and stirred for 10 minutes to obtain a solution A. Weigh 5g of bamboo charcoal and mix it with 58mL solution A, continue to stir for 30min to obtain mixture B; measure ethanol with a volume percentage of 90%, and adjust the pH of the solution to 2.7 with dilute nitric acid to obtain solution C; pour 22mL of solution C into pears In the shaped dropping funnel, adjust the plunger of the dropping funnel so that the solution C is added dropwise to the mixture B stirred at a constant speed at a rate of 1 drop / s to 2 drops / s, and the entire dropping process is controlled within 30 minutes.

[0026] Pour the mixture into three equal parts into dry p...

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Abstract

The invention discloses a method for preparing a titanium dioxide / bamboo charcoal composite material. The titanium dioxide / bamboo charcoal composite material is prepared by using bamboo charcoal as the carrier and n-tetrabutyl titanate as the titanium source and through assisting by a microwave process. During microwave heating, large and small particles in the material are simultaneously and fast heated, thereby reducing thermal stress and further avoiding the breakage of the material, improving the microstructure of the material, uniformly loading active components on the carrier and improving the photocatalysis property of the material used in the field of sewage disposal with photocatalysis oxidization process. According to the detection of X-ray diffraction, the TiO2 loaded in the composite material is mainly of anatase type. The method solves the problems that the preparation of the titanium dioxide / bamboo charcoal composite material is time-consuming and costy, uniform titanium dioxide / bamboo charcoal composite material is difficult to prepare and carbon pollution is easily caused during the sintering.

Description

a technical field [0001] The invention relates to a method for preparing chemical composite materials, in particular to a method for preparing titanium dioxide / bamboo charcoal composite materials. Two background technology [0002] Nano-titanium dioxide is widely used as a photocatalyst in the field of photocatalytic oxidation treatment of wastewater due to its stable chemical properties, high efficiency, and low cost. Due to the low utilization rate of light energy and other problems, this new technology has not been popularized and applied in industrial production; bamboo charcoal has become a very Catalyst carrier with application prospects, using bamboo charcoal as a carrier to prepare nano-titanium dioxide composite materials, can organically combine the adsorption performance of bamboo charcoal and nano-titanium dioxide photocatalytic activity, give full play to the advantages of the two materials, not only can reduce the amount of titanium dioxide, but also The prepa...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J21/06B01J37/34C02F1/30C02F1/72
Inventor 胡志彪陈燕青丘则海
Owner LONGYAN UNIV
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