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Preparation of an ultrathin porous nano-carbon nitride photocatalyst and its application in the photocatalytic oxidation of fructose to lactic acid

A nano-nitridation and catalyst technology, applied in the field of catalysis, can solve the problems of limiting the application of lactic acid and high reaction temperature, and achieve the effects of simple and easily controllable reaction conditions, high catalytic activity, and mild reaction conditions.

Active Publication Date: 2021-07-30
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current chemical synthesis of lactic acid requires a high reaction temperature, which limits the application of lactic acid to a certain extent.

Method used

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  • Preparation of an ultrathin porous nano-carbon nitride photocatalyst and its application in the photocatalytic oxidation of fructose to lactic acid
  • Preparation of an ultrathin porous nano-carbon nitride photocatalyst and its application in the photocatalytic oxidation of fructose to lactic acid
  • Preparation of an ultrathin porous nano-carbon nitride photocatalyst and its application in the photocatalytic oxidation of fructose to lactic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Accurately weigh 5.0g of melamine and 0.5g of manganese acetate hydrate into the porcelain boat, then accurately measure 2mL of distilled water into the above system, and stir evenly at room temperature;

[0042] (2) Calcining the mixture obtained in step (1) at a temperature of 550° C. for 4 hours;

[0043] (3) Grinding the product calcined in step (2) into powder to obtain a Ut-OCN photocatalyst with oxygen heteroatoms introduced.

Embodiment 2

[0045](1) Accurately weigh 5.0g of urea and 0.5g of manganese acetate hydrate into the porcelain boat, then accurately measure 2mL of distilled water into the above system, and stir evenly at room temperature;

[0046] (2) Calcining the mixture obtained in step (1) at a temperature of 550° C. for 4 hours;

[0047] (3) Grinding the product calcined in step (2) into powder to obtain a Ut-OCN photocatalyst with oxygen heteroatoms introduced.

Embodiment 3

[0049] (1) Accurately weigh 5.0g of thiourea and 0.5g of manganese acetate hydrate into the porcelain boat, then accurately measure 2mL of distilled water into the above system, and stir evenly at room temperature;

[0050] (2) Calcining the mixture obtained in step (1) at a temperature of 550° C. for 4 hours;

[0051] (3) Grinding the product calcined in step (2) into powder to obtain a Ut-OCN photocatalyst with oxygen heteroatoms introduced.

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Abstract

The invention discloses the preparation of an ultra-thin porous nano-carbon nitride photocatalyst and its application in photocatalytic oxidation of fructose to synthesize lactic acid, which belongs to the technical field of catalysis. The preparation method of the catalyst is as follows: dispersing the nitrogen-containing compound precursor and manganese acetate hydrate in deionized water, and then calcining to obtain the Ut-OCN material with oxygen heteroatoms introduced into the structure. The application process of the catalyst in the photocatalytic oxidation of fructose to synthesize lactic acid is as follows: mix the Ut-OCN photocatalyst, fructose and alkaline solution, and react with visible light at 20-80°C for 45-180min; Determination of lactic acid content by liquid chromatography. The method for preparing the catalyst of the present invention has better universality, and the catalyst used has the advantages of high catalytic activity, good thermal stability, recyclability, etc., lactic acid is synthesized by simple and efficient catalysis, and has good application prospect.

Description

technical field [0001] The invention relates to the preparation of an ultra-thin porous nanometer photocatalyst and its application in photocatalytic oxidation of fructose to synthesize lactic acid, belonging to the field of catalytic technology. Background technique [0002] With the depletion of non-renewable resources such as petroleum and the increasingly prominent environmental problems, resource utilization is constantly shifting to non-fossil, clean and renewable resources. As an important renewable resource, biomass has the advantages of abundant sources, renewable and biodegradable, and has become one of the energy sources that can replace fossil fuels. Lignocellulose is the most abundant natural polymer compound, and its transformation and utilization are of great significance to solve environmental problems and promote the sustainable development of society. As an important biomass-based monosaccharide, fructose is an isomer of glucose, which can be converted int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/00C07C51/16C07C51/295C07C59/08
CPCB01J27/24C07C51/16C07C51/295B01J35/39C07C59/08B01J23/34B01J37/088B01J37/08B01J37/0036B01J37/14B01J37/12
Inventor 孙润仓马纪亮金栋女
Owner DALIAN POLYTECHNIC UNIVERSITY
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