Preparation method of biological template for porous tubular nano-metal oxide

A nano metal, biological template technology, applied in tin oxide, nanotechnology, nanotechnology and other directions, to achieve fine pore structure, easy industrial production, good controllability

Inactive Publication Date: 2017-11-07
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are few methods of using biological templates, which is the driving force and starting point for the completion of the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the present invention, a method for preparing a biological template of porous tubular nano-tin dioxide adopts a polytetrafluoroethylene-lined 2 cubic decimeter high-pressure reaction kettle, and adopts naturally occurring sorghum stalks with multi-dimensional fine and hierarchical porous structures as the biological template. The preparation method comprises the following steps:

[0024] (1) peeling and coring the sorghum stalks, and mechanically crushing the obtained sorghum stalk cores into debris with a size of about 1 to 5 microns;

[0025] (2) Soak the sorghum straw core debris in 5wt% dilute hydrochloric acid solution for 24 hours for pretreatment to dissolve a small amount of metal oxide minerals contained in the sorghum straw core debris in the dilute hydrochloric acid solution, that is, remove the sorghum A small amount of minerals contained in straw core debris, it should be noted that, in addition to the above-mentioned dilute hydrochloric acid, dilute aci...

Embodiment 2

[0035] A method for preparing a porous tubular nano-cobalt tetroxide biological template in the present invention, using a polytetrafluoroethylene-lined 2 cubic decimeter high-pressure reactor, using naturally occurring sorghum straw with multi-dimensional fine and hierarchical porous structure as a biological template to prepare tubular porous The steps of nanometer cobalt tetroxide are:

[0036] (1) peeling and coring the sorghum stalks, and mechanically crushing the obtained sorghum stalk cores into debris with a size of about 1 to 5 microns;

[0037] (2) Soak the sorghum straw core debris in 6wt% dilute hydrochloric acid solution for 24 hours for pretreatment to dissolve a small amount of metal oxide minerals contained in the sorghum straw core debris in the dilute hydrochloric acid solution, that is, remove the sorghum A small amount of minerals contained in straw core debris, it should be noted that, in addition to the above-mentioned dilute hydrochloric acid, dilute aci...

Embodiment 3

[0047] A method for preparing a biological template of porous tubular nano-zinc oxide in the present invention adopts a 2 cubic decimeter high-pressure reaction kettle with a polytetrafluoroethylene lining, and adopts naturally occurring sorghum straw with multi-dimensional fine and hierarchical porous structures as a biological template. The method includes the following steps:

[0048] (1) peeling and coring the sorghum stalks, and mechanically crushing the obtained sorghum stalk cores into debris with a size of about 1 to 5 microns;

[0049] (2) Soak the sorghum stalk core debris in 6wt% dilute nitric acid solution for 24 hours for pretreatment to dissolve a small amount of metal oxide minerals contained in the sorghum stalk core debris in the dilute nitric acid solution, that is, remove the sorghum A small amount of minerals contained in straw core debris, it should be noted that, in addition to the above-mentioned dilute nitric acid, dilute acid solutions such as dilute h...

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Abstract

The invention discloses a preparation method of a biological template for porous tubular nano-metal oxide. A sorghum straw with a natural multi-dimensional fine, graded and porous structure is taken as a biological template, and porous tubular nano-metal oxide is formed in situ by virtue of the biological template through immersion treatment and subsequent hydrothermal reaction and oxidizing roasting. The preparation method has the beneficial effects that the process is simple, conditions are moderate, the controllability is good, and the industrial production is easily realized. The material prepared by virtue of the preparation method has a fine pore structure and a high specific surface area, so that the surface response characteristic and reuse performance of the material can be greatly improved, and the material has wide application prospects in the fields of gas sensors, photocatalysis, supercapacitors and lithium ion battery electrode materials and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and in particular relates to a method for preparing a biological template of a porous tubular nanometer metal oxide. Background technique [0002] At present, porous nanometer metal oxides are usually prepared by two methods: one is the soft template method, which utilizes the micelles or micelles that can be formed by surfactants or water-soluble polymers in aqueous solution systems under certain conditions. Metal oxide nanocrystals are formed on the surface of the micelle aggregate, and then the surfactant or water-soluble polymer is removed by washing to form a porous nano-metal oxide; the second is the hard template method, which is based on polystyrene, polyoxyethylene Alcohol or polyacrylic acid and other organic polymers form porous hydrogels or aerogels as hard templates, and then use soluble tin salts to form metal oxide nanocrystals or metal hydroxid...

Claims

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Application Information

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IPC IPC(8): C01G19/02C01G51/04C01G45/02C01G9/02B82Y30/00B82Y40/00
CPCC01G19/02B82Y30/00B82Y40/00C01G9/02C01G45/02C01G51/04C01P2004/13C01P2006/40
Inventor 林碧洲何丽雯刘岩
Owner HUAQIAO UNIVERSITY
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