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Preparation method of mixed-crystal-form titanium dioxide fiber and product

A technology of titanium dioxide and mixed crystals, applied in the field of preparation of titanium dioxide fibers, can solve the problems of greenhouse gas greenhouse effect, limited reserves, air pollution, etc., and achieve the effects of no environmental pollution, low cost and excellent performance

Inactive Publication Date: 2017-10-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, coal, oil and natural gas as traditional energy sources have limited reserves, which can only continue to be used by humans for less than three hundred years, and will produce a large amount of greenhouse gases after combustion, causing greenhouse effect and air pollution

Method used

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  • Preparation method of mixed-crystal-form titanium dioxide fiber and product
  • Preparation method of mixed-crystal-form titanium dioxide fiber and product
  • Preparation method of mixed-crystal-form titanium dioxide fiber and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Dissolve 1ml of tetrabutyl titanate in 20ml of ethylene glycol, and stir for 2 hours at room temperature to form a clear solution;

[0039] 2) Dissolve 16g of potassium hydroxide in 20ml of aqueous solution, stir for 10min, pour the KOH solution into the tetrabutyl titanate solution in step 1), and stir at room temperature for 2h to form a clear precursor solution;

[0040] 3) Transfer the precursor solution to a 50ml polytetrafluoroethylene reactor for hydrothermal reaction at 180°C for 24 hours, filter the hydrothermal reaction product, wash with 0.1M dilute nitric acid, deionized water, and absolute ethanol, and dry Potassium titanate fiber (K 2 Ti 8 o 17 );

[0041] 4) Add 0.2g of polyvinyl alcohol into 100ml of water, heat to 90°C and stir for 1 hour to obtain a clear solution, and cool to room temperature;

[0042] 5) Dissolve the above-mentioned potassium titanate fiber in 30ml of 1.5M dilute nitric acid solution, add 10ml of the PVA aqueous solution in st...

Embodiment 2

[0048] 1) Dissolve 1ml of tetrabutyl titanate in 20ml of ethylene glycol, and stir for 2 hours at room temperature to form a clear solution;

[0049] 2) Dissolve 16g of potassium hydroxide in 20ml of aqueous solution, stir for 10min, pour the KOH solution into the tetrabutyl titanate solution in step 1), and stir at room temperature for 2h to form a clear precursor solution;

[0050] 3) Transfer the precursor solution to a 50ml polytetrafluoroethylene reactor for hydrothermal reaction at 180°C for 24 hours, filter the hydrothermal reaction product, wash with 0.1M dilute nitric acid, deionized water, and absolute ethanol, and dry Potassium titanate fiber (K 2 Ti 8 o 17 );

[0051] 4) Add 0.4g of polyvinyl alcohol into 100ml of water, heat to 90°C and stir for 1 hour to obtain a clear solution, and cool to room temperature;

[0052] 5) Dissolve the above-mentioned potassium titanate fiber in 30ml of 1.5M dilute nitric acid solution, add 10ml of the PVA aqueous solution in st...

Embodiment 3

[0054] 1) Dissolve 1ml of tetrabutyl titanate in 20ml of ethylene glycol, and stir for 2 hours at room temperature to form a clear solution;

[0055] 2) Dissolve 16 g of potassium hydroxide in 20 ml of aqueous solution, stir for 10 min, pour the KOH solution into the tetrabutyl titanate solution in step 1), and stir at room temperature for 2 h to form a clear solution;

[0056] 3) Transfer the precursor solution to a 50ml polytetrafluoroethylene reactor for 200°C, 30h hydrothermal reaction, filter the hydrothermal reaction product, wash with 0.1M dilute nitric acid, deionized water, and absolute ethanol, and dry Potassium titanate fiber (K 2 Ti 8 o 17 );

[0057] 4) Add 0.2g of polyvinyl alcohol into 100ml of water, heat to 90°C and stir for 1 hour to obtain a clear solution, and cool to room temperature;

[0058] 5) Dissolve the above-mentioned potassium titanate fiber in 30ml of 1M dilute nitric acid solution, add 10ml of the PVA aqueous solution in step 4) at the same t...

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Abstract

The invention relates to a preparation method of mixed-crystal-form titanium dioxide fiber. The preparation method comprises the following steps: 1) adding a potassium hydroxide solution into a tetrabutyl titanate solution, mixing, performing a hydrothermal reaction, and filtering and cleaning a product to obtain potassium titanate fiber; 2) dispersing the potassium titanate fiber in a nitric acid solution which is 1 to 1.5M in concentration, adding a polyvinyl alcohol solution, mixing, performing a hydrothermal reaction, cleaning and filtering the product to obtain the titanium dioxide fiber. The invention further relates to a product prepared by the preparation method. The obtained titanium dioxide fiber can be of an anatase type and a rutile type, and can keep the appearance of a precursor; a large quantity of gaps exist in a fiber structure, and high photocatalytic hydrogen generation performance is achieved.

Description

technical field [0001] The invention relates to the field of titanium dioxide preparation, in particular to a preparation method and product of mixed crystal form titanium dioxide fibers. Background technique [0002] Since the mid-nineteenth century, with the development of global industrialization (especially heavy industry) and the rapid growth of population, energy shortage and various environmental pollution have become important issues restricting the healthy and stable development of society. Among them, coal, oil and natural gas, as traditional energy sources, have limited reserves and can only continue to be used by humans for less than three hundred years. After burning, a large amount of greenhouse gases will be produced, causing greenhouse effect and air pollution. Therefore, searching for renewable and environmentally friendly new energy sources has become an important topic widely studied by countries all over the world. [0003] Among many new energy sources,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01F11/00B01J21/06B01J35/00B01J35/06C01B3/04
CPCD01F9/08D01F11/00C01B3/042B01J21/063B01J35/58B01J35/39Y02E60/36
Inventor 徐刚孙小磊皇甫统帅沈鸽韩高荣
Owner ZHEJIANG UNIV
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