Preparation of porous hollow carbon nitride nanotube photocatalyst and application of porous hollow carbon nitride nanotube photocatalyst in synthesis of lactic acid by photocatalytic oxidation of xylose

A technology of photocatalyst and carbon nitride, which is applied in the field of catalysis, can solve the problems of harsh reaction conditions, cumbersome control of microbial populations, and low yield, and achieve good stability, good application prospects, and quick results

Active Publication Date: 2021-10-19
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 porous hollow carbon nitride nanotube photocatalyst and application of porous hollow carbon nitride nanotube photocatalyst in synthesis of lactic acid by photocatalytic oxidation of xylose
  • Preparation of porous hollow carbon nitride nanotube photocatalyst and application of porous hollow carbon nitride nanotube photocatalyst in synthesis of lactic acid by photocatalytic oxidation of xylose
  • Preparation of porous hollow carbon nitride nanotube photocatalyst and application of porous hollow carbon nitride nanotube photocatalyst in synthesis of lactic acid by photocatalytic oxidation of xylose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Accurately measure concentrated hydrochloric acid (12mol / L) with volumes of 1.0mL, 3.0mL, 5.0mL, 8.0mL, 10.0mL, and 15.0mL, and then add deionized water to prepare 200.0mL of hydrochloric acid solutions of different concentrations, Prepare different concentrations of hydrochloric acid solutions for later use;

[0041] (2) Accurately weigh 2.0 g of melamine and measure 10.0 mL of the hydrochloric acid solution configured in step (1) and add them to a polytetrafluoroethylene-lined reaction kettle, and stir evenly at room temperature;

[0042] (3) After the product obtained in step (2) was hydrothermally treated at 180°C for 10 hours, it was suction filtered to a neutral system solution, placed in a vacuum drying oven, and dried under vacuum at 60°C for 6 hours.

[0043] (4) Calcining the product obtained in step (3) for 2.0 hours at 500.0° C. in an atmosphere of nitrogen, and then grinding the obtained solid;

[0044] (5) Grinding the product obtained in step (4) at ...

Embodiment 2

[0046] (1) Accurately measure concentrated hydrochloric acid (12mol / L) with a volume of 10.0mL, then add deionized water to prepare 200.0mL of hydrochloric acid solutions of different concentrations, and prepare hydrochloric acid solutions of different concentrations for use;

[0047] (2) Accurately weigh 2.0 g of melamine and measure 10.0 mL of the hydrochloric acid solution configured in step (1) and add them to a polytetrafluoroethylene-lined reaction kettle, and stir evenly at room temperature;

[0048] (3) After the product obtained in step (2) is hydrothermally treated at 130°C, 150°C, and 200°C for 10 hours, it is suction filtered to a neutral system solution, placed in a vacuum drying oven, and vacuumized at 60°C. Dry for 6h.

[0049] (4) Calcining the product obtained in step (3) for 2.0 hours at 500.0° C. in an atmosphere of nitrogen, and then grinding the obtained solid;

[0050] (5) Grinding the product obtained in step (4) at a temperature of 600.0° C. in an atmosp...

Embodiment 3

[0055] (1) Take 0.1g xylose, 10.0mL KOH solutions of different concentrations (concentrations are 0.1, 0.5, 1.0mol / L, 1.5mol / L and 2.0mol / L) and 10mL of 10.0mL concentrated hydrochloric acid in Example 1 to configure The porous hollow carbon nitride nanotube photocatalyst prepared by the solution is added into the pressure-resistant bottle;

[0056] (2) Add a magnet to the system in step (1) and stir for 30 minutes;

[0057] (3) After sealing the system in step (2), react at 50.0° C. with a 300W xenon lamp for 30 minutes, and remove the porous hollow carbon nitride nanotube photocatalyst by filtration;

[0058] (4) The filtrate obtained in step (3) is used to measure the amount of lactic acid synthesized by high-performance liquid chromatography.

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Abstract

The invention discloses preparation of a porous hollow carbon nitride nanotube photocatalyst and application of the porous hollow carbon nitride nanotube photocatalyst in synthesis of lactic acid by photocatalytic oxidation of xylose, 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 hydrochloric acid solution, then carrying out hydrothermal treatment, and calcining the obtained solid to obtain the porous hollow carbon nitride nanotube material. The application process of the catalyst in synthesis of lactic acid through photocatalytic oxidation of xylose comprises the following steps: mixing the porous hollow carbon nitride nanotube photocatalyst, xylose and an alkali solution, and carrying out a photocatalytic reaction; and conducting filtering to remove the catalyst, and measuring the content of lactic acid in 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, xylose 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 porous hollow carbon nitride nanotube photocatalyst and its application in photocatalytic oxidation of xylose 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 problems of global environmental pollution and excessive energy consumption are becoming more and more serious. To solve these problems, an eco-friendly and sustainable method is developed. Graphitic carbon nitride as an organic semiconductor photocatalyst has shown great potential in photocatalytic hydrogen production and selective oxidation due to its attractive thermal and chemical stability, non-toxicity to the environment, easy synthesis, and suitable energy band structure . Lacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/10B01J37/08C07C51/00C07C59/08
CPCB01J27/24B01J35/004B01J35/0013B01J35/10B01J37/10B01J37/082C07C51/00C07C59/08
Inventor 马纪亮孙润仓杨晓盼
Owner DALIAN POLYTECHNIC UNIVERSITY
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