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Method for preparing stannic oxide hollow sphere

A technology of tin dioxide and nano-tin dioxide, applied in the direction of tin oxide, etc., can solve the problems of large-scale industrial production limitations, complex process steps, environmental pollution, etc., and achieve the effect of low cost, simple production process and low price

Inactive Publication Date: 2007-08-08
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many methods for the preparation of tin dioxide hollow spheres, such as using templates (polystyrene spheres, polysaccharide spheres, block copolymers or micelles formed by surfactants, silica spheres, etc.) The material is adsorbed or deposited on the surface of the template, and then the template is removed by calcination or solution chemical corrosion to prepare the hollow sphere material. However, this type of template needs to be prepared or purchased in advance with organic chemical raw materials, which often involves complicated process steps, thus reducing the cost. Increase, and produce environmental pollution, so that large-scale industrial production is limited

Method used

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  • Method for preparing stannic oxide hollow sphere
  • Method for preparing stannic oxide hollow sphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Pretreatment: In the reaction tank, 5g SnCl 4 ·5H 2 O was dissolved in 80 g of distilled water, and the pH value of the system was adjusted to 10 with NaOH, which was recorded as solution A.

[0023] (2) Material impregnation: Then 10 g of sycamore sawdust was added to solution A, and after impregnation at room temperature for 7 days, the impregnation was vacuum filtered and dried at room temperature to obtain impregnated sawdust powder.

[0024] (3) Heat treatment: Put the impregnated sawdust into the muffle furnace, keep the temperature of the furnace at 400°C for 20 hours, then cool down and discharge the material to produce tin dioxide hollow spheres.

[0025] Fig. 1 is the X-ray crystal diffraction spectrum of the tin dioxide hollow sphere material prepared according to embodiment 1, and the diffraction peak position shows that it is pure rutile tin dioxide. Fig. 2, Fig. 3 are respectively the low magnification TEM photo and the high magnification TEM photo o...

Embodiment 2

[0027] (1) Pretreatment: In the reaction tank, 1.5g SnCl 4 ·5H 2 O was dissolved in 148.5 g of distilled water, and the pH value of the system was adjusted to 10 with NaOH, which was recorded as solution A.

[0028] (2) Material impregnation: Then add 1.5 g of French sycamore sawdust to solution A, and after impregnating at room temperature for 7 days, vacuum filter the impregnated material, and dry at room temperature to obtain impregnated sawdust powder.

[0029] (3) Heat treatment: Put the impregnated sawdust into the muffle furnace, keep the temperature of the furnace at 400°C for 20 hours, then cool down and discharge the material to produce tin dioxide hollow spheres.

Embodiment 3

[0031] (1) Pretreatment: In the reaction tank, 25g SnCl 4 ·5H 2 O was dissolved in 100 g of distilled water, and the pH value of the system was adjusted to 12 with NaOH, which was recorded as solution A.

[0032] (2) Material impregnation: Then, 7.5 g of Paulownia sawdust was added to solution A, and after impregnation at room temperature for 5 days, the impregnation was vacuum filtered and dried at room temperature to obtain impregnated sawdust powder.

[0033] (3) Heat treatment: put the impregnated sawdust into a muffle furnace, keep the temperature of the furnace at 500°C for 10 hours, cool down and discharge the material to produce tin dioxide hollow spheres.

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Abstract

The invention discloses a making method of nanometer stannic oxide hollow ball, which comprises the following steps: allocating 1-40% stannic salt or stannate solution; adding alkaline to adjust pH value to 9-14; adding natural polymer powder into reacting tank to blend evenly; immersing for 1-10d; adding 1-20% natural polymer powder; filtering the natural polymer powder to dry; placing dried powder into high-temperature heater; processing for 3-25h under 300-800 deg.c; cooling to indoor temperature.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing nanometer tin dioxide hollow spheres. Background technique [0002] Nanoscale hollow sphere materials are an important class of novel structural materials with novel properties and functions developed in recent years. The obvious features are that they have hollow inner spaces and shells with thicknesses in the nanoscale range. The hollow part of such materials can accommodate a large number of guest molecules or large-sized guests, and at the same time, they have the characteristics of low density, high surface area, stability and surface permeability, so they can be widely used in controlled release capsules (drug , fuels, cosmetics and inks), artificial cells, filter materials, photonic crystals, drug delivery grade shape selective absorbers and catalysts and other fields. [0003] Tin dioxide (SnO 2 ) is one of the important wide-band...

Claims

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Application Information

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IPC IPC(8): C01G19/02
Inventor 曹艳霞王经武王万杰
Owner ZHENGZHOU UNIV
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