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Preparation method of lanthanide doped nanotube-TiO2 composite photocatalyst, and application of composite photocatalyst in VOCs treatment

A lanthanide and nanotube technology, applied in the field of environmental pollution control, can solve the problems of no catalyst catalytic performance, no catalyst application range, unknown application prospects, etc., and achieves large porosity, good adsorption performance, and efficient catalytic activity. Effect

Active Publication Date: 2013-10-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The defect and deficiency of the above method is that a spray molding machine is required in the catalyst preparation process, and at the same time it needs to undergo a calcination process, the preparation is relatively complicated, and the patent does not give a description of the catalytic performance of the catalyst, let alone a description of the scope of application of the catalyst. Its application prospects are unknown

Method used

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  • Preparation method of lanthanide doped nanotube-TiO2 composite photocatalyst, and application of composite photocatalyst in VOCs treatment
  • Preparation method of lanthanide doped nanotube-TiO2 composite photocatalyst, and application of composite photocatalyst in VOCs treatment
  • Preparation method of lanthanide doped nanotube-TiO2 composite photocatalyst, and application of composite photocatalyst in VOCs treatment

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Experimental program
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Effect test

Embodiment 1

[0025] 17 mL of tetrabutyl titanate, 40 mL of absolute ethanol and 3 mL of glacial acetic acid were prepared as a mixed solution A, and the mixed solution A was slowly added dropwise to a mixed solution of 15 mL of absolute ethanol and lanthanum nitrate, and stirred for 1 After 1 h, it was aged at room temperature for 6 h until a transparent gel was formed, and the gel was washed repeatedly with ethanol, and then dried at 70 °C for 12 h. The precursor powder was formed after sufficient grinding in the mortar. The doping amount of lanthanum element in the prepared nanoparticle precursor was 1.0%wt.

[0026] Mix 1.5 g of the prepared sol-gel powder with 120 mL of 10M NaOH solution evenly, then transfer to a 200 mL hydrothermal kettle, hydrothermally treat at 130 °C for 48 h, cool at room temperature and filter to obtain a milky white precipitate; Rinse with 0.1 M HCL solution for 5 times, and then rinse with deionized water until the cleaning solution is close to the value of d...

Embodiment 2

[0028]Prepare mixed solution A with 14 mL tetrabutyl titanate, 40 mL absolute ethanol and 3 mL glacial acetic acid, slowly add the mixed solution A to the mixed solution of 12 mL absolute ethanol and cerium nitrate, and stir for 1 h After aging at room temperature for 6 h until a transparent gel was formed, the gel was washed repeatedly with ethanol and dried at 70 °C for 12 h. The precursor powder was formed after sufficient grinding in the mortar. The doping amount of cerium element in the prepared nanoparticle precursor was 0.8%wt.

[0029] Mix 2 g of the prepared sol-gel powder with 120 mL of 10M NaOH solution evenly, then transfer it to a 200 mL hydrothermal kettle, treat it at 130 °C for 48 h, and filter it after cooling at room temperature to obtain a milky white precipitate; first Rinse 6 times with 0.1 M HCL solution, and then rinse with deionized water until the cleaning solution is close to the value of deionized water, about 6.5. After the sample was filtered and...

Embodiment 3

[0031] Prepare mixed solution A with 18 mL tetrabutyl titanate, 40 mL absolute ethanol and 3 mL glacial acetic acid, slowly add the mixed solution A to the mixed solution of 14 mL absolute ethanol and neodymium nitrate, and stir for 1 After 1 h, it was aged at room temperature for 6 h until a transparent gel was formed, and the gel was washed repeatedly with ethanol, and then dried at 70 °C for 12 h. The precursor powder was formed after sufficient grinding in the mortar. The doping amount of neodymium in the prepared nanoparticle precursor was 3.0%.

[0032] Mix 3 g of the prepared sol-gel powder with 120 mL of 10M NaOH solution evenly, then transfer to a 200 mL hydrothermal kettle, hydrothermally treat at 130 °C for 48 h, cool at room temperature and filter to obtain a milky white precipitate; Rinse with 0.1 M HCL solution for 5 times, and then rinse with deionized water until the cleaning solution is close to the value of deionized water, about 6.5. After the sample was f...

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Abstract

The invention relates to a preparation method of a lanthanide doped nanotube-TiO2 composite photocatalyst. The method is characterized in that the method comprises the following steps: preparing a lanthanide doped nanoparticle precursor through utilizing a sol-gel process, reacting the nanoparticle precursor in high-temperature high-pressure strongly alkaline environment, washing, filtering, and drying to obtain the lanthanide doped nanotube-TiO2 composite photocatalyst. The preparation method has the advantages of no need of calcining, simplicity and energy saving, and the prepared composite photocatalyst has an excellent catalysis performance.

Description

technical field [0001] The invention belongs to the field of environmental pollution control, in particular to a lanthanide-doped nanotube TiO 2 A preparation method of a composite photocatalyst, and the application of the composite photocatalyst in VOCs treatment. Background technique [0002] In recent years, the environmental pollution caused by volatile organic compounds (VoLatiLe organic compounds, VOCs) has become increasingly serious. In particular, VOCs emitted from industrial production processes such as pharmaceutical chemicals, textile printing and dyeing, have the characteristics of many components, high toxicity, and refractory degradation, which endanger the ecological environment and human health. Therefore, the prevention and control of VOCs pollution has very important practical significance. [0003] At present, the technologies for dealing with VOCs mainly include adsorption method, combustion method, absorption method, etc., but these technologies have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01D53/86B01D53/44
Inventor 成卓韦陈建孟於建明蒋轶锋周灵俊
Owner ZHEJIANG UNIV OF TECH
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