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Photocatalyst and preparation method and application thereof

A photocatalyst and cuboid technology, applied in the field of photocatalysis, can solve problems such as low efficiency and easy deactivation, and achieve the effects of cost saving, strong redox ability, and good activity stability.

Inactive Publication Date: 2012-10-03
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Intended to solve the traditional catalyst TiO 2 Problems such as low efficiency and easy deactivation when degrading gas-phase organic aromatic compounds (VOCs) pollutants

Method used

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  • Photocatalyst and preparation method and application thereof
  • Photocatalyst and preparation method and application thereof
  • Photocatalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0018] The preparation steps of the present invention are as follows:

[0019] The equimolar amount of raw material CdCl 2 ·2.5H 2 O and Na 2 SnO 3 ·4H 2 Put O into the beaker, add 60 ml of distilled water to the beaker, stir vigorously for 30 min at room temperature to form a uniform white suspension, then adjust the pH of the above turbid liquid to 11 with 5% ammonia water, and combine the turbid liquid It was transferred to a 100 ml microwave reactor and reacted for 2 h at 160°C in a microwave digester. After cooling, the product was centrifuged and washed, and the product was dried in an oven at 60°C to obtain the photocatalyst.

Embodiment 1

[0021] CdSnO with nano hollow cuboid morphology 3 ·3H 2 Preparation of O photocatalyst

[0022] The equimolar amount of raw material CdCl 2 ·2.5H 2 O and Na 2 SnO 3 ·4H 2 Put O into the beaker, add 60 ml of distilled water to the beaker, stir vigorously for 30 min at room temperature to form a uniform white suspension, then adjust the pH of the above turbid liquid to 11 with 5% ammonia water, and combine the turbid liquid It was transferred to a 100 ml microwave reactor and reacted for 2 h at 160°C in a microwave digester. After cooling, the product was centrifuged and washed, and the product was dried in an oven at 60°C to obtain the photocatalyst. figure 1 Demonstrates the CdSnO of the present invention 3 ·3H 2 The X-ray diffraction (XRD) pattern of the O photocatalyst, from which you can find the prepared CdSnO 3 ·3H 2 O is the pure phase. figure 2 Demonstrates the CdSnO of the present invention 3 ·3H 2 The UV-visible diffuse reflectance image of O photocatalyst, from which you...

Embodiment 2

[0024] CdSnO with nano hollow cuboid morphology 3 ·3H 2 O photocatalyst gas phase degradation of benzene

[0025] The prepared catalyst was used to degrade gas phase benzene to evaluate its photocatalytic performance. The reaction device consists of a quartz glass tube (length 11 cm, diameter 2.4 mm), the amount of catalyst is 0.3 g, sieved 50-70 mesh, the catalyst is filled in the quartz tube, and the two ends of the catalyst are respectively plugged with quartz wool. The K-type thermocouple extends into the catalyst reaction tube to detect the temperature of the system, and uses an electric fan to cool the system so that the temperature of the system is always maintained at room temperature. The airflow rate is 20 mL / min. The light source uses 4 4 W UV lamps. , The main excitation wavelength is 254 nm. The reactants and products are automatically sampled by online chromatography (HP6890, Porapak R packed column, TCD, FID) at regular intervals, and the concentration of the simu...

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Abstract

The invention relates to a method for preparing CdSnO3.3H2O in the shape of a nanometer hollow cuboid and the application of the method in a photocatalyst, which belong to the technical field of photocatalysis in environmental management and aim to solve the problems of low efficiency, high inactivation possibility and the like in the process of decomposing a gas-phase organic aromatic compound (VOCs) pollutant by using the conventional catalyst TiO2. The CdSnO3.3H2O is applied in the field of photocatalysis for the first time; the CdSnO3.3H2O in the shape of the nanometer hollow cuboid is synthesized by an efficient and convenient microwave hydrothermal method without the addition of any template agent; the prepared product has effective gas-phase benzene degradation activity; and the preparation method is simple and contributes to large-scale popularization, and raw materials are low in price and readily available.

Description

Technical field [0001] The invention belongs to the technical field of photocatalysis in environmental governance, and specifically is a catalyst CdSnO with a regular nano hollow cuboid morphology 3 ·3H 2 O and its preparation method and application. Background technique [0002] Organic aromatic compounds (VOCs) are widely used in industrial production, and this broad application will cause water and air pollution, especially indoor air pollution. It is reported that the benzene compounds in VOCs are highly carcinogenic to humans. Therefore, the use of photocatalytic technology to eliminate benzene has attracted wide attention from researchers. Among them, the traditional catalyst TiO 2 Because of its advantages such as low price, non-toxicity, and good catalytic performance, it has attracted wide attention. But due to TiO 2 In the process of degrading benzene, TiO 2 The surface is prone to carbon deposits, leading to deactivation of the catalyst. To solve this problem, schola...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01D53/86B01D53/72
Inventor 吴棱刘国栋梁诗景戴文新陈旬付贤智
Owner FUZHOU UNIVERSITY
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