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Preparation method of ultrathin B phase titanium dioxide nano sheet

A titanium dioxide and nanosheet technology, applied in the directions of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of high output of waste by-products, difficult production, large amount of sulfuric acid, etc., and achieve the output of waste by-products. Less, good application value, mild synthesis and post-treatment conditions

Inactive Publication Date: 2016-08-03
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The production of titanium dioxide is highly technology-intensive and difficult to produce
The industrial production of titanium dioxide in China began in the 1950s. At present, the sulfuric acid method is mainly used to produce anatase titanium dioxide and a small amount of rutile titanium dioxide. The main disadvantages are the large amount of sulfuric acid and the high output of waste by-products.
However, the international commonly used chlorination method to prepare titanium dioxide has the disadvantages of high energy consumption and large pollution.

Method used

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  • Preparation method of ultrathin B phase titanium dioxide nano sheet
  • Preparation method of ultrathin B phase titanium dioxide nano sheet
  • Preparation method of ultrathin B phase titanium dioxide nano sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) In an open beaker, add 1 mL of titanium tetrachloride to 30 mL of ethylene glycol, and stir for 10 minutes to obtain a titanium glycolate solution.

[0028] (2) Add 1 mL of water into the titanium ethylene glycol solution prepared in step (1), stir for 10 min, transfer the resulting solution to a reaction kettle, react at 150° C. for 4 h, and then centrifuge the resulting suspension.

[0029] (3) Wash the white precipitate obtained in step (2) with water and ethanol for 3 times, then dry naturally to obtain the target product.

[0030] Depend on figure 1 It can be seen that the prepared ultra-thin titanium dioxide has a typical two-dimensional material structure. Depend on figure 2 It can be seen that the X-ray diffraction pattern of the obtained ultrathin TiO2 powder indicates its unique B-phase structure. Nitrogen adsorption curve based on ultrathin titanium dioxide ( image 3 ), it can be seen that the ultra-thin titanium dioxide has the adsorption behavior ...

Embodiment 2

[0032] (1) In an open beaker, add 3 mL of titanium tetrachloride to 30 mL of ethylene glycol, and stir for 10 minutes to obtain a titanium glycolate solution.

[0033] (2) Add 3 mL of water into the titanium ethylene glycol solution prepared in step (1), stir for 10 min, transfer the resulting solution to a flask, react at 150° C. for 4 h, and then centrifuge the resulting suspension.

[0034] (3) Wash the white precipitate obtained in step (2) with water and ethanol for 3 times, then dry naturally to obtain the target product.

Embodiment 3

[0036] (1) In an open beaker, add 1 mL of titanium tetrachloride to 30 mL of ethylene glycol, and stir for 10 minutes to obtain a titanium glycolate solution.

[0037] (2) Add 1 mL of water into the titanium ethylene glycol solution prepared in step (1), stir for 10 min, transfer the resulting solution to a flask, react at 160° C. for 4 h, and then centrifuge the resulting suspension.

[0038] (3) Wash the white precipitate obtained in step (2) with water and ethanol for 3 times, then dry naturally to obtain the target product.

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Abstract

The invention discloses a preparation method of an ultrathin B phase titanium dioxide nano sheet, and relates to the field of titanium dioxide. The preparation method comprises the following steps: (1) adding a titanium precursor into glycol, and stirring to obtain a glycol-titanium solution; (2) adding water into the glycol-titanium solution obtained in the step (1), stirring, carrying out reactions at a temperature of 150 to 180 DEG C, and subjecting the obtained turbid liquid to centrifugation so as to obtain white precipitate; (3) washing the white precipitate obtained in the step (2), and drying white precipitate in the air to obtain the ultrathin B phase titanium dioxide nano sheet. The preparation method has the advantages that the raw materials are cheap, little sulfuric acid is used, the output of waste byproducts is little; the reaction temperature is mild and is far lower than the boiling point of glycol; the reaction pressure is not high and thus is benefit for amplification operation; the thickness of the prepared ultrathin titanium dioxide nano sheet is less than 2 nm, the nano sheet appears typical characteristics of a two-dimensional material; the operability is strong, the reaction apparatus is simple, the synthesis and post treatment conditions are mild, the conditions during the preparation process are mild, the reaction process is clean and pollution-free, and the reaction efficiency is high.

Description

technical field [0001] The invention relates to titanium dioxide, in particular to a method for preparing ultrathin B-phase titanium dioxide nanosheets. Background technique [0002] Titanium dioxide, commonly known as titanium powder and titanium dioxide, is an important inorganic chemical product. Due to the important uses of titanium dioxide in photocatalysis, coatings, plastics, papermaking, synthetic fibers, printing inks, rubber, enamel and other industrial fields, its consumption has become one of the main indicators used by economists to measure a country's living standards. The world's titanium dioxide output developed very rapidly at one time. It was only 1kt in 1920 and 5kt in 1925. Since rutile-type commercial titanium dioxide appeared in the US market in 1941, it reached 2.5Mt in 1974. Since then, due to factors such as energy and environmental protection, production has declined. Since 1984, the international supply of titanium dioxide has been in short suppl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00B82Y40/00
CPCC01G23/0536B82Y30/00B82Y40/00C01P2004/20C01P2004/64C01P2006/12
Inventor 郑南峰刘朋昕秦瑞轩莫世广臧丹丹
Owner XIAMEN UNIV
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