Composite catalyst and preparation method and application thereof

A composite catalyst, mixed solution technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of incomplete oxidation, low removal efficiency, etc., to achieve increased concentration, low preparation cost, The effect of improving the efficiency of oxidation treatment

Active Publication Date: 2020-09-25
EAST CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual application process of NTP, there are often problems such a

Method used

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  • Composite catalyst and preparation method and application thereof
  • Composite catalyst and preparation method and application thereof
  • Composite catalyst and preparation method and application thereof

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Effect test

Embodiment 1

[0025] Embodiment 1: Preparation of GO-BiOCl (001) composite catalyst

[0026] 1) Disperse 4mg of graphene oxide (GO) into 10mL of absolute ethanol, add 40mg of polyvinylpyrrolidone into the above solution, and disperse by ultrasonic for 10min. Then remove the supernatant under the rotating speed condition of 7000r / min, and redisperse the sediment in the absolute ethanol of 10ml;

[0027] 2) 93mg of Bi(NO 3 ) 3 ·5H 2 O is dissolved in the mannitol solution (1mol / L), magnetically stirred and dispersed to obtain a mixed solution of 10mL;

[0028] 3) After mixing the two solutions obtained in step 1) and step 2) evenly, slowly add 5 mL of saturated sodium chloride solution, and stir at room temperature for 20 min;

[0029] 4) Transfer the mixed solution to a hydrothermal kettle, and heat it in water at 160°C for 3 hours. After the temperature returns to room temperature, centrifuge at 7000r / min, wash with ethanol and deionized water for 4 times, and place in a blast Dry in a...

Embodiment 2

[0036] Embodiment 2: under the action of low-temperature plasma, the application of the composite catalyst synthesized in oxidation VOCs:

[0037]Toluene was selected as the experimental model, and the low temperature plasma technology (NTP) composite catalyst was used to degrade VOCs. Using the working principle of dielectric barrier discharge, the NTP reactor is designed. The coiled stainless steel mesh is placed on the inside and outside of the quartz tube, and connected to the external high-voltage AC power supply (Y16J12516) as the positive and negative electrodes of the discharge. Take 2-10 mg of the synthesized composite photocatalyst and disperse it into 5-20 μL of ethanol solution, then add 5-20 μL of naphthol, disperse evenly and spread it on a 1cm×4cm ITO conductive glass, dry it at 40-80℃ for later use . According to this method, the catalyst is fixed on the ITO conductive glass, as follows figure 2 As shown, alternately immobilized inside the reaction chamber o...

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Abstract

The invention discloses a composite catalyst as well as a preparation method and application thereof. The composite catalyst is formed by hybridizing graphene oxide (GO) and bismuth oxychloride (BiOCl) nanosheets. The preparation method comprises the following steps: uniformly dispersing graphene oxide into an ethanol solution; dissolving polyvinylpyrrolidone in the mixed solution, centrifuging the mixture to remove the supernatant, and re-dispersing the supernatant in the ethanol solution; dissolving Bi(NO3)3.5H2O into a mannitol solution, uniformly mixing the components, adding a saturated sodium chloride solution after uniformly mixing the two mixed solutions, transferring the mixed solutions into a polytetrafluoroethylene substrate reaction kettle, and carrying out hydrothermal heating; and centrifuging, washing and drying the reaction product to obtain the catalyst, named as GO-BiOCl (001). Under the condition of low-temperature plasma, the GO-BiOCl (001) catalyst generates activespecies with extremely high oxidability under the collision excitation of high-energy electrons, so that efficient purification of VOCs pollution gas is realized.

Description

technical field [0001] The invention belongs to the field of air treatment and purification, and specifically relates to the design and synthesis of a GO-BiOCl(001) composite photocatalyst with an advantageous contact interface, in particular to the synthesis and preparation method of this composite catalyst and its degradation of VOCs driven by low-temperature plasma in the application. Background technique [0002] In the past two decades, low-temperature plasma (NTP) technology has been applied to degrade VOCs as an advanced oxidation technology. Compared with the traditional heat removal method, almost all the energy invested in NTP technology is used for the acceleration of electrons, without heating the entire gas, and the gas can be kept at room temperature, so the energy utilization rate of NTP technology is higher , has a very important application prospect for the treatment of low-concentration VOCs gas. NTP technology mainly uses the generated high-energy electr...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01J37/10B01D53/86B01D53/44B01D53/32
CPCB01J27/06B01J37/10B01D53/8687B01D53/88B01D53/32B01D2255/802B01D2257/708B01D2259/818Y02A50/20
Inventor 宋也男吴文杰孙卓
Owner EAST CHINA NORMAL UNIVERSITY
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