BiZn hydrotalcite photocatalyst, and preparation method and application thereof

A catalyst, Shiguang's technology, applied in the direction of chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problems of unfavorable practical application, cumbersome production process, harsh reaction conditions, etc., and achieve low raw material cost and high reaction rate. The effect of low condition requirement and reduction of reaction cost

Active Publication Date: 2019-11-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, methods for synthesizing hydrotalcite mainly include low-saturation co-precipitation method, hydrothermal synthesis method, ion exchange method, microwave crystallization method, etc., but these methods have harsh reaction conditions, cumbersome production process, and are not conducive to practical applications. question

Method used

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  • BiZn hydrotalcite photocatalyst, and preparation method and application thereof
  • BiZn hydrotalcite photocatalyst, and preparation method and application thereof
  • BiZn hydrotalcite photocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 0.72g sodium lauryl sulfate, 20mL ethylene glycol and 1.1mL water, then add 1.5mL n-butanol solution dropwise (the volume ratio of ethylene glycol and n-butanol to water is 19.5:1, the surface active The dosage ratio of agent and water is 0.0025:1mol / ml), wait for the solution to stir until it is transparent. Add 0.002 mol of zinc acetate and 0.002 mol of bismuth nitrate pentahydrate (the ratio of zinc salt to water is 0.1:1 mol / L). After stirring for 1 h, 1.35 g of thiourea was added (the ratio of thiourea to water was 0.017:1 mol / mL), and the oil bath was heated to 80°C, and the heating was continued for 20 hours. After the heating is completed, cool down and perform suction filtration to collect the solid product, transfer the solid product to a constant temperature box and dry it at 60° C. to obtain a BiZn hydrotalcite photocatalyst.

Embodiment 2

[0040] Mix 0.72g of sodium lauryl sulfate, 20mL of ethylene glycol and 1.1mL of water, then add 1.5mL of n-butanol solution dropwise, and wait until the solution is stirred until it becomes transparent. 0.002 mol of zinc acetate and 0.002 mol of bismuth nitrate pentahydrate were added. After stirring for 1 h, 1.35 g of thiourea (or urea of ​​the same concentration) was added, and the oil bath was heated to 90° C., and the heating was continued for 26 hours. After the heating is completed, cool down and perform suction filtration to collect the solid product, transfer the solid product to a constant temperature box and dry it at 60° C. to obtain a BiZn hydrotalcite photocatalyst. figure 1 The SEM image obtained for this embodiment has a relatively clear two-dimensional ultra-thin nanosheet structure, and the thickness of the nanosheet is 5-10 nm. figure 2 The TEM image obtained in this example shows typical lattice fringes of BiZn hydrotalcite. image 3 For the XRD image obt...

Embodiment 3

[0042] Mix 0.72g of sodium lauryl sulfate, 20mL of ethylene glycol and 1.1mL of water, then add 1.5mL of n-butanol solution dropwise, and wait until the solution is stirred until it becomes transparent. 0.002 mol of zinc acetate and 0.002 mol of bismuth nitrate pentahydrate were added. After stirring for 1 h, 1.35 g of thiourea was added, and the oil bath was heated to 100° C., and the heating was continued for 30 hours. After the heating is completed, cool and perform suction filtration to collect the solid product, transfer the solid product to a constant temperature box and dry it at 60° C. to obtain a BiZn hydrotalcite photocatalyst.

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Abstract

The invention discloses a BiZn hydrotalcite photocatalyst, and a preparation method and application thereof. The photocatalyst is two-dimensional ultra-thin BiZn nanosheets having a thickness of 5-10nm. The method includes (1) mixing a surfactant, ethylene glycol and water, then adding n-butanol, and stirring the solution until the solution is transparent; (2) adding a zinc salt and a bismuth salt, stirring the mixture, then adding thiourea or urea to obtain a mixture solution, and heating the solution for reaction; and (3) after heating is finished, performing cooling, filtration and dryingto obtain the BiZn hydrotalcite photocatalyst. The photocatalyst can be used for catalyzing xylose conversion to prepare xylonic acid. The method has advantages of low reaction condition requirements,low raw material costs, simple and feasible synthesis, and a reduced production cost so that the method has an industrial production potential. A photocatalytic reaction system different from the traditional thermal catalytic processes is energy-saving, safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the interdisciplinary technical fields of two-dimensional materials, photocatalysis, and conversion of biomass into chemicals, and in particular relates to a BiZn hydrotalcite photocatalyst and a preparation method and application thereof. Background technique [0002] Hemicellulose is a very abundant biomass resource in nature. Hemicellulose is a heterogeneous polymer composed of several different types of monosaccharides, five- and six-carbon sugars, including xylose, arabinose, and galactose. And xylose is the main product of hemicellulose hydrolyzate, and xylose acid can be obtained by oxidation of xylose. Xylose acid is one of the important metabolites of vitamin C, and it plays a vital role in regulating the effective circulation and metabolism of vitamin C in organisms. Therefore, xylose in hemicellulose can be used to produce xylonic acid, which not only significantly reduces production costs and accelerates the devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18C07C51/295C07C59/105
CPCB01J23/007B01J23/18B01J35/004C07C51/295C07C59/105
Inventor 彭新文李铭赛钟林新马纪亮邹刃陈亮
Owner SOUTH CHINA UNIV OF TECH
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