Preparation of modified carbon nitride photocatalyst and application of modified carbon nitride photocatalyst in synthesis of lactic acid by photocatalytic oxidation of glucose

A catalyst and glucose technology, applied in the field of catalysis, can solve the problems of cumbersome microbial population control, low yield, harsh reaction conditions, etc., and achieve the effect of recyclable catalytic activity, quick effect and good stability

Active Publication Date: 2020-11-06
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this biological process has disadvantages such as low yield, harsh reaction conditions (temperature and pH value), and cumbersome microbial population control.

Method used

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  • Preparation of modified carbon nitride photocatalyst and application of modified carbon nitride photocatalyst in synthesis of lactic acid by photocatalytic oxidation of glucose
  • Preparation of modified carbon nitride photocatalyst and application of modified carbon nitride photocatalyst in synthesis of lactic acid by photocatalytic oxidation of glucose
  • Preparation of modified carbon nitride photocatalyst and application of modified carbon nitride photocatalyst in synthesis of lactic acid by photocatalytic oxidation of glucose

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Accurately measure 1.0mL, 3.0mL, 5.0mL, 8.0mL, 10.0mL, and 15.0mL of glacial acetic acid, then add deionized water to prepare 200.0mL acetic acid solutions with different concentrations, and then accurately weigh 10.0g Boric acid is added to the above system, and boric acid-acetic acid solutions with different concentrations are prepared for subsequent use;

[0042] (2) Accurately weigh 3.0g of melamine and 3.0mL of the boric acid-acetic acid solution prepared in step (1) into the porcelain boat, and stir evenly at room temperature;

[0043] (3) Calcining the product obtained in step (2) at 400.0°C for 2.0 hours, and then grinding the obtained solid;

[0044] (4) Calcining the product obtained in step (3) at a temperature of 560.0° C. for 2.0 h, and then grinding the obtained product into powder to obtain an in-situ doped boron and oxygen heteroatom modified carbon nitride photocatalytic material.

Embodiment 2

[0046] (1) Accurately measure 10.0 mL of glacial acetic acid, then add deionized water to prepare 200.0 mL of acetic acid solution, then accurately weigh 10.0 g of boric acid and add it to the above system to prepare boric acid-acetic acid solution for later use;

[0047](2) Accurately weigh 3g of nitrogen-containing compound precursors (melamine, thiourea, urea and dicyandiamide respectively) and 2mL of boric acid-acetic acid solution prepared in step (1), add 1mL of water into the porcelain boat, Stir well at room temperature;

[0048] (3) Calcining the product obtained in step (2) at 400.0°C for 2.0 hours, and then grinding the obtained solid;

[0049] (4) Calcining the product obtained in step (3) at a temperature of 560.0° C. for 2.0 h, and then grinding the obtained product into powder to obtain an in-situ doped boron and oxygen heteroatom modified carbon nitride photocatalytic material.

Embodiment 3

[0051] (1) Accurately measure 10.0 mL of glacial acetic acid, then add deionized water to prepare 200.0 mL of acetic acid solution, then accurately weigh 10.0 g of boric acid and add it to the above system to prepare boric acid-acetic acid solution for later use;

[0052] (2) Accurately weigh 3g of nitrogen-containing compound precursors (melamine, thiourea, urea and dicyandiamide respectively) and 1mL of boric acid-acetic acid solution, add 2mL of water into the porcelain boat, and stir evenly at room temperature;

[0053] (3) Calcining the product obtained in step (2) at 400.0°C for 2.0 hours, and then grinding the obtained solid;

[0054] (4) Calcining the product obtained in step (3) at a temperature of 560.0° C. for 2.0 h, and then grinding the obtained product into powder to obtain an in-situ doped boron and oxygen heteroatom modified carbon nitride photocatalytic material.

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Abstract

The invention discloses preparation of a modified carbon nitride photocatalyst and application of the modified carbon nitride photocatalyst in synthesis of lactic acid by photocatalytic oxidation of glucose, and belongs to the technical field of catalysis. The preparation method of the catalyst comprises the following steps: uniformly stirring a nitrogen-containing compound precursor and a boric acid-acetic acid solution, calcining, and further calcining to obtain the in-situ boron and oxygen heteroatom doped modified carbon nitride material. The application process of the catalyst in photocatalytic oxidation of glucose to synthesize lactic acid comprises the following steps: mixing the modified carbon nitride photocatalyst, glucose and an alkaline solution, and carrying out a photocatalytic reaction; and filtering to remove the catalyst, and determining the lactic acid content of the filtrate through a high performance liquid chromatograph. The method for preparing the catalyst has good universality, the used catalyst has the advantages of being high in catalytic activity, good in stability, capable of being recycled and the like, glucose is simply and efficiently catalyzed to synthesize lactic acid, and good application prospects are achieved.

Description

technical field [0001] The invention relates to the preparation of a modified carbon nitride photocatalyst and its application in photocatalytic oxidation of glucose to synthesize lactic acid, which belongs to the field of catalytic technology. Background technique [0002] With the depletion of non-renewable resources such as petroleum, the production of chemical products from renewable biomass has become a trend to achieve sustainable development of the chemical industry. The European Union White Paper put forward relevant policies on biomass conversion and utilization in the "European Bioeconomy 2030", and the "National Bioeconomy Blueprint" of the White House in the United States was also put on the agenda in 2012. Lactic acid, as an important high-value chemical produced from biomass refining, is mainly used in the food, pharmaceutical industry and the manufacture of biodegradable plastics such as polylactic acid. In a sustainable society, the market demand for lactic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00C07C51/16C07C51/295C07C59/08
CPCB01J35/004B01J27/24C07C51/295C07C51/16C07C59/08
Inventor 马纪亮孙润仓李彦聪金栋女王硕
Owner DALIAN POLYTECHNIC UNIVERSITY
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