Antimony-doped tin oxide-manganese oxide composite catalyst for room-temperature catalytic oxidation of formaldehyde and preparation method thereof

An antimony-doped tin oxide, composite catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of high complete degradation temperature, low resistivity, The problem of low catalytic efficiency at room temperature, etc., can improve the catalytic activity, the operation is convenient and feasible, and the redox activity can be enhanced.

Inactive Publication Date: 2020-11-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the manganese oxide catalysts reported at present still have the problems of low catalytic efficiency at room temperature and high complete degradation temperature, Zhang et al. 2313) discovered α-MnO with different morphologies 2 , β-MnO 2 and γ-MnO 2 The temperatures for the catalysts to completely convert formaldehyde under the same conditions are 125°C, 200°C and 150°C respectively
In recent years, nanoantimony-doped t

Method used

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  • Antimony-doped tin oxide-manganese oxide composite catalyst for room-temperature catalytic oxidation of formaldehyde and preparation method thereof
  • Antimony-doped tin oxide-manganese oxide composite catalyst for room-temperature catalytic oxidation of formaldehyde and preparation method thereof
  • Antimony-doped tin oxide-manganese oxide composite catalyst for room-temperature catalytic oxidation of formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Preparation of Manganese Oxide Catalyst by Hydrothermal Method

[0059] Dissolve 1.0 g of potassium permanganate and 0.8 g of ammonium oxalate solid in deionized water and mix, stir magnetically at room temperature for 15 minutes to dissolve to obtain a mixed solution; transfer the mixed solution to a 100 mL high-pressure Teflon-lined In the reaction kettle, then hydrothermally react at 100°C for 12h. After the reaction is completed, cool to room temperature naturally, and then centrifuge to obtain the precipitate. The precipitate is exchanged and washed with water and absolute ethanol for 3 times, and then dried at 80°C. 8h obtains manganese oxide catalyst (MnO 2 ).

[0060] Depend on figure 1 and image 3 It can be seen that the as-prepared MnO was shown by X-ray diffraction and scanning electron microscopy 2 The catalyst is composed of flaky birnessite-type manganese oxide and fibrous birnessite-type manganese oxide, which are connected to each other to form a sp...

Embodiment 2

[0067] Hydrothermal treatment of antimony-doped tin oxide nanoparticles

[0068] Antimony-doped tin oxide nanoparticles (purchased from Shanghai Institute of Ceramics, Chinese Academy of Sciences, SnO 2 : Sb 2 o 3 =9: 1) was added to deionized water and mixed, and ultrasonically dispersed for 30 minutes to obtain a mixed solution; the mixed solution was transferred to a 100mL autoclave with a polytetrafluoroethylene liner, and then placed in water at 100°C Heat the reaction for 12 hours. After the reaction is completed, naturally cool to room temperature, and then centrifuge to obtain the precipitate. The precipitate is exchanged and washed with water and absolute ethanol for 3 times, and then dried at 70°C for 8 hours to obtain the antimony-doped oxidation product after hydrothermal treatment. Tin nanoparticles (ATO).

[0069] Depend on figure 1 and Figure 4 It can be known that the X-ray diffraction and scanning electron microscopy show that the phase of the ATO nanopa...

Embodiment 3

[0076] An antimony-doped tin oxide-manganese oxide composite catalyst for catalytic oxidation of formaldehyde at room temperature, the antimony-doped tin oxide-manganese oxide composite catalyst includes antimony-doped tin oxide nanoparticles, manganese oxide nanowires and manganese oxide nanosheets.

[0077] The preparation method of described antimony-doped tin oxide-manganese oxide composite catalyst specifically comprises the following steps:

[0078] 1) Disperse 0.3 g of antimony-doped tin oxide nanoparticles in 40 mL of deionized water, and then ultrasonically disperse for 30 minutes to obtain an antimony-doped tin oxide dispersion;

[0079] 2) Add 1.0 g of potassium permanganate and 0.8 g of ammonium oxalate solid to the antimony-doped tin oxide dispersion obtained in step 1), and then magnetically stir for 15 minutes at room temperature to obtain a mixed solution;

[0080] 3) Put the mixture obtained in step 2) into a hydrothermal reactor, and react for 12 hours at a t...

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Abstract

The invention relates to an antimony-doped tin oxide-manganese oxide composite catalyst for room-temperature catalytic oxidation of formaldehyde and a preparation method thereof. A photo-thermal material namely antimony-doped tin oxide is compounded with a catalytic active component namely manganese oxide, so that the absorbed light energy can be effectively converted into heat energy by utilizingthe photo-thermal effect of the antimony-doped tin oxide, the redox activity of the material is enhanced, and the catalytic activity of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and in particular relates to an antimony-doped tin oxide-manganese oxide composite catalyst for catalytically oxidizing formaldehyde at room temperature and a preparation method thereof. Background technique [0002] With the rapid development of the economy and the continuous acceleration of human industrialization, people's living standards are also constantly improving, but at the same time, the pressure on the environment we rely on for survival is also increasing. In recent years, following soot pollution and photochemical pollution, indoor air pollution has become the main environmental pollution problem that endangers human health, and has received more and more attention. Among them, the most important pollutants are volatile organic compounds (Volatile Organic Compounds, VOCs). VOCs generally include alcohols, ketones, aldehydes, and various olefins, aromatics, nap...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J35/02B01D53/86B01D53/72
CPCB01D53/8668B01J23/002B01J23/34B01J35/023B01J35/026
Inventor 陶颖杨光纪士东
Owner SHANGHAI UNIV
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