Carbon-based-multimetal composite nanometer catalytic material as well as preparation method and application thereof

A nano-catalytic material and multi-metal oxide technology, which is applied in the preparation of amino compounds, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of complex components, harm to human health and environmental safety, Solve problems such as high salt content, achieve uniform distribution of metal particles, broad market application prospects, and improve catalytic performance

Active Publication Date: 2020-01-17
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The treatment of high-concentration, complex and refractory organic wastewater has always been a problem that plagues industrial production and environmental protection. It has the characteristics of high COD, complex components, high ammonia nitrogen, high chroma, heavy odor, and high salt content, which seriously endanger human health and environment safety
Due to its high oxidation-reduction potential, ozone has great application potential in organic wastewater. However, for high-concentration refractory organic wastewater, ozone oxidation has problems such as low ozone utilization rate and certain selectivity of ozone.
Therefore, it is an effective method to develop a new ozone catalyst for ozone catalytic oxidation. Using this technology can combine the strong oxidation of ozone with the high specific surface enrichment and catalytic characteristics of the catalyst to effectively solve the problem of high concentration Low utilization rate of ozone in refractory organic wastewater, high operating costs, incomplete degradation of organic matter, etc.
[0003] At present, the preparation of ozone catalysts is mainly prepared by precipitating single or multiple metal ions on the surface of porous supports and then calcining them. There are two problems in the preparation of catalysts by this method: first, the dispersion of metal ions is not uniform during deposition, and the obtained catalysts after calcination Metals or metal oxides are not nanoscale; second, not all metal ions can be deposited on the support surface
In addition, the current methods for preparing metal nano-ozone catalysts are usually hydrothermal synthesis, sol-gel method, seed crystal method, etc. The conditions required by these methods are harsh, toxic reagents need to be added during the preparation process, and there are metal nanoparticles And other issues
Therefore, it is urgent to find a new preparation method to overcome the difficulty in the preparation of nano-catalytic materials.

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  • Carbon-based-multimetal composite nanometer catalytic material as well as preparation method and application thereof
  • Carbon-based-multimetal composite nanometer catalytic material as well as preparation method and application thereof
  • Carbon-based-multimetal composite nanometer catalytic material as well as preparation method and application thereof

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Embodiment 1

[0046] A carbon-based-polymetallic nano-catalytic material of the present invention is based on the carbon-based material containing micropores obtained by living Escherichia coli (Escherichia coliBL21) after carbonization and activation, and is loaded on the surface of the carbon-based material and in the micropores. Cu, CuO, Cu 2 O, Fe, FeO, Fe 2 o 3 , Fe 3 o 4 , Mn, MnO, MnO 2 , Mn 2 o 3 , Mn 3 o 4 , Al, Al 2 o 3 The nano-particles of multi-metal simple substance and multi-metal oxide, the carbon-based-multi-metal composite nano-catalyst material is irregular sheet-like nano-carbon, and its average size is 80×300nm; the average particle size of multi-metal oxide nanoparticles is 33.4nm.

[0047] The preparation method of carbon-based-multimetal nanocatalytic material in the present embodiment comprises the following steps:

[0048] 1) Escherichia coli (Escherichia coli BL21) was inoculated and expanded into 1 L of LB medium under sterile conditions, and after sh...

Embodiment 2

[0057] A carbon-based multi-metallic nano-catalytic material of the present invention is based on a carbon-based material containing micropores obtained after carbonization and activation of living Shewanella (Shewanellaoneidensis MR-1), on the surface of the carbon-based material and micro Loaded with Pt, PtO in the hole 2 , PtO, Pd, PdO and other multi-metal simple substances and multi-metal oxide nanoparticles, carbon-multi-metal composite nano-catalytic materials are irregular sheet-like nano-carbons, and their average size is 80×300nm; nano-particles of multi-metal oxides The average particle diameter of the particles was 32.6 nm.

[0058] The preparation method of carbon-based-multimetal nanocatalytic material in the present embodiment comprises the following steps:

[0059] 1) Under sterile conditions, inoculate and expand Shewanella oneidensis MR-1 into 1L of LB medium, shake culture at 30°C for 36h to reach the logarithmic phase, and then centrifuge at 8000rpm for 20...

Embodiment 3

[0068] A carbon-based multi-metallic nano-catalytic material of the present invention is based on a carbon-based material containing micropores obtained after carbonization and activation of living Shewanella (Shewanellaoneidensis MR-1), on the surface of the carbon-based material and micro The holes are loaded with Ti, TiO, TiO 2 、Ti 3 o 5 , W, WO 2 、WO 3 The nano-particles of multi-metal simple substance and multi-metal oxide, the carbon-based-multi-metal composite nano-catalytic material is irregular sheet-like nano-carbon, and its particle size is an average size of 80×300nm; the average size of multi-metal oxide nanoparticles is The particle size is 33.5 nm.

[0069]The preparation method of carbon-based-multimetal nanocatalytic material in the present embodiment comprises the following steps:

[0070] 1) Under sterile conditions, inoculate and expand Shewanella oneidensis MR-1 into 1L of LB medium, shake culture at 25°C for 12 hours to reach the logarithmic phase, a...

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Abstract

The invention discloses a carbon-based-multimetal composite nanometer catalytic material. The porous carbon-based-multimetal composite nanometer catalytic material is prepared by adsorbing multimetalions by microorganisms serving as adsorbents and then performing carbonization and activation, wherein the multimetal ions are loaded on the surface and in the micropores of a carbon-based-multimetalcomposite nanometer catalytic material in the forms of nanoparticles of multimetal elementary substances and / or multimetal oxides. The carbon-based-multimetal composite nanometer catalytic material has large specific surface area, rich micropores and metal particle distribution uniformity, has synergistic effect, interfacial effect and strain effect, is applicable as a catalyst, and has wide market application prospect. The invention also discloses a preparation method and application of the carbon-based-multimetal composite nanometer catalytic material. The method is simple in process, low incost and environmentally-friendly. The carbon-based-multimetal composite nanometer catalytic material has good catalytic degradation effect on organisms in high-concentration organic waste water, andhigh stability and high treatment efficiency are achieved.

Description

technical field [0001] The invention belongs to the field of new material preparation, and in particular relates to a carbon-based-multimetal composite nano-catalyst material and its preparation method and application. Background technique [0002] The treatment of high-concentration, complex and refractory organic wastewater has always been a problem that plagues industrial production and environmental protection. It has the characteristics of high COD, complex components, high ammonia nitrogen, high chroma, heavy odor, and high salt content, which seriously endanger human health and environment safety. Due to its high oxidation-reduction potential, ozone has great application potential in organic wastewater. However, for high-concentration refractory organic wastewater, ozone oxidation has problems such as low ozone utilization rate and certain selectivity of ozone. Therefore, it is an effective method to develop a new ozone catalyst for ozone catalytic oxidation. Using t...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/44B01J23/30B01J35/10C07C209/36C07C211/46C02F1/72C02F1/78C02F101/30
CPCB01J23/8892B01J23/44B01J23/30B01J23/002C07C209/36C02F1/725C02F1/78C02F2101/30C02F2209/08B01J2523/00B01J35/60B01J35/61C07C211/46B01J2523/17B01J2523/31B01J2523/72B01J2523/842
Inventor 谢建平范炜武海艳刘新星邱冠周
Owner CENT SOUTH UNIV
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