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Preparation method and application of silver-titanium dioxide-carbon nano composite material

A nanocomposite material, titanium dioxide technology, applied in chemical instruments and methods, special compound water treatment, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as limited promotion and application

Active Publication Date: 2020-11-20
GANSU NATURAL ENERGY RES INST (UNITED NATIONS IND DEV ORG INT SOLAR TECH PROMOTION & TRANSFER CENT)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO2 nanomaterials have the advantages of strong oxidation ability, good stability, low price, non-toxic and harmless, etc., and have broad application potential, but TiO2 Belonging to wide bandgap semiconductors, it can only absorb ultraviolet light, and ultraviolet light only accounts for about 4% of sunlight, which greatly limits the promotion and application of TiO2

Method used

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  • Preparation method and application of silver-titanium dioxide-carbon nano composite material
  • Preparation method and application of silver-titanium dioxide-carbon nano composite material
  • Preparation method and application of silver-titanium dioxide-carbon nano composite material

Examples

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Effect test

Embodiment 1

[0033] Embodiment 1 A kind of preparation method of silver-titanium dioxide-carbon nanocomposite material:

[0034] Add 0.75g of biomass corn stalks to 50 mL of mixed ethanol solution of silver nitrate and butyl titanate, and soak them in the dark for 24 hours, so that butyl titanate and silver nitrate can be fully adsorbed on the biomass corn stalks. Under the sunlight for 2 hours, the Ag ions undergo photochemical reduction reaction to form Ag simple substance; finally, the TiO 2 The biomass corn stalks with nanoparticles and simple Ag were taken out, dried naturally and placed in a crucible, and calcined in an air atmosphere in a muffle furnace at a heating rate of 5 °C / min to 700 °C for 2 hours. After cooling to room temperature, 0.025Ag / TiO 2 @C nanocomposites.

[0035] Wherein: the preparation method of the mixed ethanol solution of silver nitrate and butyl titanate refers to first preparing the butyl titanate ethanol solution whose concentration is 0.0585mol / L; The m...

Embodiment 2

[0037] Example 2 A preparation method of silver-titanium dioxide-carbon nanocomposite material:

[0038] Add 0.75g of biomass corn stalks to 50 mL of mixed ethanol solution of silver nitrate and butyl titanate, and soak them in the dark for 24 hours, so that butyl titanate and silver nitrate can be fully adsorbed on the biomass corn stalks. Under the sunlight for 2 hours, the Ag ions undergo photochemical reduction reaction to form Ag simple substance; finally, the TiO 2 Biomass corn stalks with nanoparticles and simple Ag were taken out, dried naturally, placed in a crucible, and calcined in an air atmosphere in a muffle furnace at a heating rate of 5°C / min to 700°C. Cool to room temperature to get 0.05Ag / TiO 2 @C nanocomposites.

[0039] Wherein: the preparation method of the mixed ethanol solution of silver nitrate and butyl titanate refers to first preparing the butyl titanate ethanol solution whose concentration is 0.0585mol / L; The molar ratio of butyl titanate / butyl t...

Embodiment 3

[0041] Example 3 A preparation method of silver-titanium dioxide-carbon nanocomposite material:

[0042] Add 0.75g of biomass corn stalks to 50 mL of mixed ethanol solution of silver nitrate and butyl titanate, and soak them in the dark for 24 hours, so that butyl titanate and silver nitrate can be fully adsorbed on the biomass corn stalks. Under the sunlight for 2 hours, the Ag ions undergo photochemical reduction reaction to form Ag simple substance; finally, the TiO 2 Biomass corn stalks with nanoparticles and simple Ag were taken out, dried naturally, placed in a crucible, and calcined in an air atmosphere in a muffle furnace at a heating rate of 5°C / min to 700°C. Cool to room temperature to get 0.1Ag / TiO 2 @C nanocomposites.

[0043] Wherein: the preparation method of the mixed ethanol solution of silver nitrate and butyl titanate refers to first preparing the butyl titanate ethanol solution whose concentration is 0.0585mol / L; The molar ratio of butyl titanate to butyl...

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Abstract

The invention relates to a preparation method of a silver-titanium dioxide-carbon nano composite material. The method comprises the following steps: adding biomass cornstalks into a mixed ethanol solution of silver nitrate and butyl titanate, dipping in a dark place for 24 hours to fully adsorb the butyl titanate and the silver nitrate on the biomass cornstalks, illuminating in the sun for 2 hoursto ensure that Ag ions are subjected to photochemical reduction reaction to form Ag elementary substances, finally, fishing out the biomass cornstalks loaded with the TiO2 nanoparticles and the Ag elementary substance, naturally airing, calcining and cooling to room temperature to obtain the Ag / TiO2 (at) C nano composite material. The invention also discloses an application of the composite material. According to the preparation method, a series of Ag / TiO2-C nano composite materials are prepared by adopting a photochemical reduction-high-temperature calcination two-step method, the method issimple and easy to implement, and the obtained composite materials can achieve the purpose of improving the removal rate and mineralization rate of phenol under visible light.

Description

technical field [0001] The invention relates to the technical field of composite materials and the technical field of environmental pollution control, in particular to a preparation method and application of a silver-titanium dioxide-carbon nanocomposite material. Background technique [0002] Photocatalytic oxidation technology can degrade organic matter in the environment into water and carbon dioxide under light excitation, and has broad application prospects in air purification, sterilization and deodorization, and wastewater treatment. In photocatalytic oxidation technology, photocatalytic materials play a vital role. TiO 2 Nanomaterials have the advantages of strong oxidation ability, good stability, low price, non-toxic and harmless, etc., and have broad application potential, but TiO 2 Belonging to a wide bandgap semiconductor, it can only absorb ultraviolet light, and ultraviolet light only accounts for about 4% of sunlight, which greatly limits the ability of TiO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50C02F1/30C02F101/30C02F101/34
CPCB01J23/50C02F1/30C02F2101/345C02F2101/30C02F2305/10B01J35/39Y02W10/37
Inventor 韩立娟安兴才张平胡英瑛刘刚
Owner GANSU NATURAL ENERGY RES INST (UNITED NATIONS IND DEV ORG INT SOLAR TECH PROMOTION & TRANSFER CENT)
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