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A method for preparing nitrogen-doped carbon nanotube-coated metal oxide particle composite materials from biomass waste

A technology of biomass waste and oxide particles, which is applied in the field of comprehensive utilization of biomass waste, can solve the problems of high preparation cost, low yield and purity, and cumbersome steps, and achieve low cost, wide sources, and simple process Effect

Active Publication Date: 2018-02-02
安徽皖瑞能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to provide a method for preparing nitrogen-doped carbon nanotube-coated metal oxide particle composite material by using biomass waste. Formation of metal-coated nano-oxide nanoparticle structure, in-situ modification of nitrogen elements and other technical problems, and overcome the technical shortcomings of traditional preparation methods such as high preparation costs, cumbersome steps, low yield and purity

Method used

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  • A method for preparing nitrogen-doped carbon nanotube-coated metal oxide particle composite materials from biomass waste
  • A method for preparing nitrogen-doped carbon nanotube-coated metal oxide particle composite materials from biomass waste
  • A method for preparing nitrogen-doped carbon nanotube-coated metal oxide particle composite materials from biomass waste

Examples

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Embodiment 1

[0029] (1) Carbonized distiller's grain waste: Weigh 10.0g (0.1782mol) KOH and 10.0g distiller's grain waste, mix them in a beaker containing 80mL deionized water, keep stirring at 25°C for 8h, dry and grind, Obtain heterogeneous mixture A; place this heterogeneous mixture A in a quartz boat, and move the quartz boat to the constant temperature zone of a tubular resistance furnace with nitrogen protection gas, and heat up to 750°C, then carbonized at constant temperature for 2 hours, the product was washed with dilute hydrochloric acid solution with a concentration of 0.5mol / L and distilled water, and dried to obtain distiller's grain charcoal.

[0030] (2) Preparation of nitrogen-doped carbon nanotube-coated metal oxide particle composites by pyrolysis

[0031] Weigh 0.2g distillers charcoal, 80.0mg (0.2878mmol) FeSO 4 ·7H 2 O and 4.0g (0.0317mol) melamine; Mix the three heterogeneously in a beaker containing 100mL of methanol, magnetically stir for 5h to mix the three even...

Embodiment 2

[0036] (1) Carbonized corn stalk waste: Weigh 10.0g (0.1782mol) KOH and 10.0g corn stalk waste, mix them in a beaker containing 80mL deionized water, keep stirring at 25°C for 8h, dry, Grind to obtain the heterogeneous mixture A; place the heterogeneous mixture A in a quartz boat, and move the quartz boat to the constant temperature zone of the tubular resistance furnace with nitrogen protection gas, at a heating rate of 10°C / min The temperature was raised to 750° C., and then carbonized at a constant temperature for 2 hours. The product was washed with a dilute hydrochloric acid solution with a concentration of 0.5 mol / L and distilled water, and dried to obtain corn stalk charcoal.

[0037] (2) Preparation of nitrogen-doped carbon nanotube-coated metal oxide particle composites by pyrolysis

[0038] Weigh 0.2g corn stalk charcoal, 80.0mg (0.2878mmol) FeSO 4 ·7H 2 O and 4.0g (0.0317mol) melamine; Mix the three heterogeneously in a beaker containing 100mL of methanol, magneti...

Embodiment 3

[0041] (1) Carbonized rice husk waste: Weigh 10.0g (0.1782mol) KOH and 10.0g rice husk waste, mix them in a beaker containing 80mL deionized water, keep stirring at 25°C for 8h, dry, Grind to obtain the heterogeneous mixture A; place the heterogeneous mixture A in a quartz boat, and move the quartz boat to the constant temperature zone of the tubular resistance furnace with nitrogen protection gas, at a heating rate of 10°C / min Raise the temperature to 750°C, then carbonize at a constant temperature for 2 hours, wash the product with a dilute hydrochloric acid solution with a concentration of 0.5mol / L and distilled water, and obtain rice husk charcoal after drying.

[0042] (2) Preparation of nitrogen-doped carbon nanotube-coated metal oxide particle composites by pyrolysis

[0043] Weigh 0.2g rice husk charcoal, 80.0mg (0.2878mmol) FeSO 4 ·7H 2 O and 4.0g (0.0317mol) melamine; Mix the three heterogeneously in a beaker containing 100mL of methanol, magnetically stir for 5h t...

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Abstract

The invention discloses a method for preparing a nitrogen-doped carbon nanotube-coated metal oxide particle composite material by using biomass waste, which comprises the following steps: firstly, mixing the biomass waste and KOH uniformly in deionized water to obtain the The heterogeneous mixture is carbonized under the protection of an inert gas to obtain biochar; then the biochar, nitrogen-containing non-metallic compounds, and water-soluble divalent metal salts are mixed uniformly in methanol, and the obtained heterogeneous mixture is under the protection of an inert gas. Under pyrolysis, the target product is obtained. The invention adopts a two-step pyrolysis process to realize the growth of carbon nanotubes, which promotes the dispersion of metal oxide nanoparticles and the formation of a synergistic mechanism; the structure of carbon nanotubes coated metal oxide nanoparticles strengthens the composite material Stability; the in-situ modification of nitrogen element improves the surface activity and dispersion of the carbon layer; the formation of rich pore structure and high specific surface area increases the number of contact and active sites.

Description

technical field [0001] The invention relates to a method for preparing a composite material coated with metal oxide particles by using biomass waste as a raw material, and belongs to the research field of comprehensive utilization of biomass waste. Background technique [0002] Due to their unique mechanical, electronic and chemical properties, carbon nanotubes have attracted widespread attention worldwide, and have been widely used in many fields such as electricity, optics, catalysis, and biomedicine. In recent years, with the deepening of research on carbon nanomaterials and the promotion of their applications, simple, low-cost, batch preparation of carbon nanocomposites has become the key to promote their wide application. Exploring and developing the preparation of carbon nanocomposites using cheap and easy-to-obtain biomass waste resources in nature has become a hot issue widely concerned by scientists and engineers. [0003] On the other hand, the modification of car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/30B82Y40/00
CPCB82Y40/00B22F9/30B22F1/07B22F1/16
Inventor 姚运金吴国东连超陈浩陈本金
Owner 安徽皖瑞能源科技有限公司
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