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Preparation process of complex photocatalyst with multiwalled carbon nanotube loading silver/silver phosphate core-shell structure

A technology of multi-walled carbon nanotubes and core-shell structure, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of short production cycle, uniform particle size, and simple preparation steps

Inactive Publication Date: 2015-12-16
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most conventional photocatalysts can only absorb ultraviolet light

Method used

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  • Preparation process of complex photocatalyst with multiwalled carbon nanotube loading silver/silver phosphate core-shell structure
  • Preparation process of complex photocatalyst with multiwalled carbon nanotube loading silver/silver phosphate core-shell structure
  • Preparation process of complex photocatalyst with multiwalled carbon nanotube loading silver/silver phosphate core-shell structure

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Weigh 4.3 g of multi-walled carbon nanotubes, put them in a mortar and grind for 20 minutes, then add them to a 250 ml conical flask, inject 100 ml of 65% nitric acid, and ultrasonically disperse for 1 hour. Then put the ultrasonicated sample into a 250ml three-necked flask, place it on a heating mantle, stir magnetically at 115°C and reflux for 12h. After refluxing, it is cooled to room temperature and washed repeatedly with deionized water and absolute ethanol until it is neutral. The obtained black sample is dried in a drying oven at 100° C. to obtain purified multi-walled carbon nanotubes.

[0020] Weigh 0.33g of diammonium hydrogen phosphate, 0.33g of polyvinylpyrrolidone (PVP-K30) and 4.3g of purified multi-walled carbon nanotubes under magnetic stirring and add them to a three-necked flask containing 60ml of ethylene glycol to prepare Solution A. Weigh 0.85g silver nitrate and dissolve it in 15ml ethylene glycol to prepare solution B. Use a pipette to inject solut...

Embodiment 2

[0022] Weigh 6.5g of multi-walled carbon nanotubes, put them in a mortar and grind for 20 minutes, then add them to a 250ml conical flask, inject 150ml of 70% nitric acid, and ultrasonically disperse for 0.5h. Then put the ultrasonic sample into a 250ml three-necked flask, place it on a heating mantle, magnetically stir at 125°C and reflux for 6h. After refluxing, it was cooled to room temperature, and washed repeatedly with deionized water and absolute ethanol until it became neutral. The obtained black sample was dried in a drying oven at 50°C to obtain purified multi-walled carbon nanotubes.

[0023] Weigh out 0.13g of diammonium hydrogen phosphate, 0.13g of polyvinylpyrrolidone (PVP-K30) and 6.5g of purified multi-walled carbon nanotubes under magnetic stirring and add them to a three-necked flask containing 80ml of ethylene glycol to prepare Solution A. Weigh 0.34 g of silver nitrate and dissolve it in 10 ml of ethylene glycol to prepare solution B. Use a pipette to inject...

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Abstract

The invention relates to a preparation process of a complex photocatalyst with a multiwalled carbon nanotube loading silver / silver phosphate core-shell structure. The preparation process comprises the following steps of performing pretreatment on a carbon nanotube and preparing the complex photocatalyst with the multiwalled carbon nanotube loading silver / silver phosphate core-shell structure by an in-situ glycol reduction method. The preparation process disclosed by the invention has the beneficial effects that a sample of the complex photocatalyst with the multiwalled carbon nanotube loading silver / silver phosphate core-shell structure has a regular morphology, a comparatively uniform particle size and better particle dispersibility; experiment raw materials have wide sources; the preparation steps are simpler; the condition is mild; the production cycle is shorter, and the obtained composite has a better structure; the nano-composite photocatalyst has an efficient degradating effect on the organic dye malachite green under visible light radiation, can be applied to the photocatalytic oxidation technology, and is capable of effectively removing organic pollutants in water environments.

Description

Technical field [0001] The invention belongs to the field of nano material preparation, and relates to a preparation method of a multi-wall carbon nanotube loaded silver / silver phosphate core-shell structure composite photocatalyst. Background technique [0002] In 1972, the famous Japanese chemist Fujishima discovered single crystal TiO 2 It can decompose H2O under ultraviolet light to produce hydrogen and oxygen. In 1976, Frank et al. pioneered the use of semiconductor materials for photocatalytic degradation of pollutants. After this breakthrough technology was applied to the restoration of environmental pollution in a timely manner, it immediately created a highly efficient and widely applicable "green" cleaning technology-"semiconductor photocatalytic technology." Photocatalytic technology can use photocatalysts to completely mineralize organic pollutants under ultraviolet or visible light irradiation. Therefore, photocatalytic technology has received widespread attention i...

Claims

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Application Information

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IPC IPC(8): B01J27/18B82Y30/00B82Y40/00C02F1/30
Inventor 李忠玉丁超颖丛田田田力梁倩徐松
Owner CHANGZHOU UNIV
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