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Supported nano TiO2 catalyst and preparation method thereof

A supported catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve catalyst adsorption and light absorption efficiency reduction, reduce catalyst activity, etc. problems, to achieve unique biocompatibility and degradability, controllable shape, high water holding effect

Inactive Publication Date: 2014-07-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The immobilization of the catalyst with such a carrier can lead to a reduction in the adsorption and light absorption efficiency of the catalyst, thereby reducing the activity of the catalyst.

Method used

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  • Supported nano TiO2 catalyst and preparation method thereof
  • Supported nano TiO2 catalyst and preparation method thereof
  • Supported nano TiO2 catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step is to rinse the wet crude bacterial cellulose with 1‰ hydrogen peroxide, add it to 1% sodium hydroxide alkaline solution, heat and stir at 100°C for 12 hours, then neutralize it with acetic acid solution, and then wash it with deionized water until neutralized. sex;

[0033] In the second step, the bacterial cellulose obtained in the first step is soaked in a solution with an ethanol volume concentration of 50%, and then gradually increases the proportion of ethanol in the solution to 90%, and removes the bacteria on the surface of the bacterial cellulose through solvent exchange. Sequenced water, and finally centrifuged to separate the bacterial cellulose.

[0034] In the third step, use 99% ethanol solution as a solvent, add centrifuged bacterial cellulose and stir evenly, add 1ml acetylacetone, then add 1g urea, and finally slowly add 5ml tetrabutyl titanate, and finally the mixture is at room temperature Stir for 30min.

[0035] In the fourth step, ...

Embodiment 2

[0041] In the first step, the wet bacterial cellulose is rinsed with 2‰ hydrogen peroxide, then added to 2% sodium hydroxide alkali solution, heated and stirred at 100°C for 12 hours, then neutralized with acetic acid solution, and then washed with deionized water until neutralized. sex;

[0042] In the second step, the bacterial cellulose obtained in the first step is soaked in a solution with an ethanol volume concentration of 50%, and then gradually increases the proportion of ethanol in the solution to 90%, and removes the bacteria on the surface of the bacterial cellulose through solvent exchange. Sequenced water, and finally centrifuged to separate the bacterial cellulose.

[0043] In the third step, use 95% ethanol solution as a solvent, add the centrifuged bacterial cellulose and stir evenly. Add 1ml of acetylacetone, then add 5ml of ammonia solution with a mass fraction of 28%, and finally add 8ml of tetrabutyl titanate slowly, and finally the mixture is stirred at r...

Embodiment 3

[0047] The first step is to rinse the wet crude bacterial cellulose with 5‰ hydrogen peroxide, add it to 1% sodium hydroxide alkali solution, heat and stir at 100°C for 12 hours, then neutralize it with acetic acid solution, and then wash it with deionized water until neutralized. sex;

[0048] In the second step, the bacterial cellulose obtained in the first step is soaked in a solution with an ethanol volume concentration of 50%, and then gradually increases the proportion of ethanol in the solution to 90%, and removes the bacteria on the surface of the bacterial cellulose through solvent exchange. Sequenced water, and finally centrifuged to separate the bacterial cellulose.

[0049] In the third step, 90% ethanol solution was used as a solvent, and the centrifuged bacterial cellulose was added and stirred evenly. Add 2ml of acetylacetone, then add 1.2g of urea, and finally slowly add 10ml of tetrabutyl titanate, and finally the mixture is stirred at room temperature for 30...

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Abstract

The invention discloses a supported nano TiO2 catalyst and a preparation method of the supported nano TiO2 catalyst. The preparation method comprises the following steps: firstly carrying out certain pretreatment on bacterial cellulose prepared by a dynamic fermentation method, by utilizing rich polyhydroxyl groups and a directionally-distributed water molecule layer on the surface of the bacterial cellulose, enabling the titanium dioxide precursor comprising chlorate, sulfate and organic complex and the like to be directionally hydrolyzed on the surface of the bacterial cellulose by a hydrothermal method, and finally preparing the supported nano TiO2 catalyst by dewatering. The supported nano TiO2 catalyst prepared by the invention has the advantages that the preparation process is simple, the cost is low, the reaction condition is mild, the shape of a product is controllable and the specific surface area is large and the like, and can be widely applied in the fields such as photocatalysis, optical devices and proton exchange membrane fuel cells.

Description

technical field [0001] The invention belongs to the field of novel hydrothermal synthesis, in particular to a loaded nano TiO 2 Catalyst and method for its preparation. Background technique [0002] Nano-metal oxide catalysts have a large specific surface area. Due to the small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect, etc., they exhibit novel physical, chemical and biological properties that conventional materials do not have. Conversion, batteries, catalysis, sensing and other fields have good performance and applications, so they have been extensively studied. [0003] Among various nanometer metal oxide catalysts, TiO 2 It has the characteristics of high photocatalytic activity, biological and chemical inertness, and strong corrosion resistance. Therefore, TiO 2 It is considered to be a promising material and is used for basic and practical application research. Nano-TiO 2 The preparation method of the catalyst is mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/10
Inventor 杨加志蒋国民魏静孙东平鲁啸宇代北北
Owner NANJING UNIV OF SCI & TECH
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