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Preparation method of hollow sphere made of titanium dioxide composite

A technology of titanium dioxide and nano-titanium dioxide, which is applied in the direction of titanium dioxide, microsphere preparation, chemical instruments and methods, etc., to achieve the effects of reducing pollution, easy control, and stable pH value

Active Publication Date: 2015-06-03
常州纳欧新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few literatures on the preparation of pure rutile nano-TiO hollow spheres

Method used

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  • Preparation method of hollow sphere made of titanium dioxide composite
  • Preparation method of hollow sphere made of titanium dioxide composite
  • Preparation method of hollow sphere made of titanium dioxide composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: take 150 grams of spherical calcium carbonate whose particle diameter is 300~500nm, add 850 grams of deionized water, be mixed with mass percentage concentration 15% calcium carbonate suspension, calcium carbonate suspension (pH value 9.0) be warmed up to 75°C, while stirring, add 0.5mol·L to the suspension -1 Sodium metasilicate nonahydrate (Na 2 SiO 3 9H 2 (0) solution and the carbon dioxide gas that feeds into the mole percentage composition is 40%, and other components are air in the gas, maintains 75 ℃ of system temperature, after 2 liters of sodium metasilicate solutions add, continue to feed carbon dioxide gas to the system The pH value is 7.2, and then the mixture is kept at 75° C. and stirred for 20 minutes to obtain a calcium carbonate suspension whose surface is coated with amorphous silicon dioxide.

[0026] Step 2: Adjust the temperature of the suspension in step 1 to 25°C, and add 2.5mol L to the suspension while stirring -1 Titanium tetrachlor...

Embodiment 2

[0030] Step 1: take 400 grams of spherical calcium carbonate whose particle diameter is 300~500nm, add 600 grams of deionized water, be mixed with mass percentage concentration 40% calcium carbonate suspension, calcium carbonate suspension (pH value 11.0) be warmed up to 95°C, while stirring, add 0.1mol·L to the suspension -1 Sodium metasilicate nonahydrate (Na 2 SiO 3 9H 2 (0) solution and the carbon dioxide gas that feeds into the molar percentage composition is 10%, and other components are air in the gas, maintains 95 ℃ of system temperature, after 3.33 liters of sodium metasilicate solutions are added, continue to feed carbon dioxide gas to the system. The pH value is 8.5, and then the mixture is kept at 95° C. and stirred for 60 minutes to obtain a calcium carbonate suspension whose surface is coated with amorphous silicon dioxide.

[0031] Step 2: Adjust the temperature of the suspension in step 1 to 50°C, and add 0.1mol L to the suspension while stirring -1 Titaniu...

Embodiment 3

[0035] Step 1: take 300 grams of spherical calcium carbonate whose particle diameter is 300~500nm, add 700 grams of deionized water, be mixed with mass percentage concentration 30% calcium carbonate suspension, calcium carbonate suspension (pH value 10.0) be warmed up to 88°C, while stirring, add 0.2mol·L to the suspension -1 Sodium metasilicate nonahydrate (Na 2 SiO 3 9H 2 (0) solution and the carbon dioxide gas that feeds into the mole percentage composition is 25%, and other components are air in the gas, maintains 88 ℃ of system temperature, after 5 liters of sodium metasilicate solutions add, continue to feed carbon dioxide gas to the system. The pH value is 8.0, and then the mixture is kept at 88° C. and stirred for 30 minutes to obtain a calcium carbonate suspension whose surface is coated with amorphous silicon dioxide.

[0036] Step 2: Adjust the temperature of the suspension in step 1 to 32°C, and add 1.5mol L to the suspension while stirring -1 Titanium tetrachl...

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Abstract

The invention belongs to the technical field of inorganic nonmetallic materials, particularly relates to a preparation method of a hollow sphere made of titanium dioxide composite, and specifically relates to a method for preparing a rutile type titanium dioxide hollow sphere with calcium carbonate serving as a template. The specific idea of the method is as follows: firstly, the surface of calcium carbonate is coated with amorphous silica, then, titanium dioxide nanocrystalline is deposited or grown on the surface of silica, meanwhile, calcium carbonate is removed, and the rutile type titanium dioxide hollow sphere is prepared.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a method for preparing titanium dioxide hollow spheres, in particular to a method for preparing rutile-type titanium dioxide hollow spheres by using calcium carbonate as a template. Background technique [0002] Titanium dioxide has high oxidation activity, stable chemical properties, non-toxicity, and low cost, and has become the most promising green and environmentally friendly functional material. Among nano titanium dioxide with various shapes, the hollow structure titanium dioxide material has unique advantages and potential application prospects in the research of photoelectric and catalytic materials due to its simple preparation and good photocatalytic ability. Therefore, the preparation of titanium dioxide hollow spheres has high use value. [0003] Rutile nano-titanium dioxide has the advantages of high ultraviolet shielding efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B82Y30/00B82Y40/00B01J13/02
CPCB01J13/02C01G23/0536C01P2002/72C01P2002/82C01P2004/34C01P2004/62
Inventor 姚鹏程沈铸睿
Owner 常州纳欧新材料科技有限公司
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