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CQD/UiO-66 composite photocatalytic material, and preparation method and application thereof

A composite photocatalysis, uio-66 technology, applied in the field of CQD/UiO-66 composite photocatalytic materials and its preparation, can solve the problem of high recombination rate of electrons and holes, achieve good photocatalytic activity, increase active sites, The effect of reducing compounding efficiency

Pending Publication Date: 2021-10-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a CQD / UiO-66 composite photocatalytic material and its preparation method and application, to solve the problem of high recombination rate of electrons and holes in single-phase UiO-66, Provide an effective method to achieve high catalytic performance of materials

Method used

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  • CQD/UiO-66 composite photocatalytic material, and preparation method and application thereof
  • CQD/UiO-66 composite photocatalytic material, and preparation method and application thereof
  • CQD/UiO-66 composite photocatalytic material, and preparation method and application thereof

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preparation example Construction

[0027] The preparation method of the above CQD / UIO-66 composite photocatalytic material includes the following steps:

[0028] (1) After drying the flower shell 100 ° C, pulverized 3 times in the pulverizer, and the resulting peanuts powder sealing bag is spare. A certain amount of peanut powder and urea were dissolved in 60 ml of deionized water, and after half an hour, transferred to the polytetrafluoroethylene reaction kettle to carry out the hydrothermal reaction, and the resulting reaction solution was filtered, and the drying was dried. To obtain a solid powder of the CQD carbon quantum point.

[0029] (2) Sell a certain amount of tetrachloride and 2-amino group terephthalic acid ultrasound in 50 mln, N-dimethylformamide solution, and this solution is illusted as solution A. Weigh a certain amount of CQD carbon quantum dot to the solution A, continue to ultrasonically completely dissolve, transfer the mixed solution to the polytetrafluoroethylene reaction kettle for solven...

Embodiment 1

[0039] (1) After drying the waste peanut shell 100 ° C, pulverized 3 times in the pulverizer, and the resulting peanuts powder sealing bag is spare. It is weighed 3.0 g of peanut shell powder, 3.0 g of urea, dissolved in 60 mL of deionized water, and after half an hour, transfer to a polytetrafluoroethylene reaction kettle reaction 18h at 200 ° C, after cooling to room temperature, the resulting reaction liquid The resulting clear solution was dialyzed for three days with a 1000 dA dialysis bag, and then a water was transferred once, and the Cqd solid powder was obtained.

[0040] (2) Weigh 0.2475 g of zirconium chloride, 0.1924 g 2-amino phenylene terephthalic acid, after ultrasonic dissolution in 50 ml n, N-dimethylformamide solution, add 0.001 g of CQD, continue to ultrasound to completely dissolve, The mixture was transferred to a 100 mL of the high pressure reactor at 120 ° C for 24 h, and after cooling to room temperature, the resulting sample was centrifuged with N, N-dimet...

Embodiment 2

[0042] (1) After drying the waste peanut shell 100 ° C, pulverized 3 times in the pulverizer, and the resulting peanuts powder sealing bag is spare. 3G peanuts powder and 1.5 g of urea were weighed in 60 ml of deionized water. After half an hour, transferred to a polytetrafluoroethylene reaction kettle at 200 ° C for 18 h, after cooling to room temperature, the resulting reaction liquid Filtration, the resulting clear solution was dialyzed for three days with a dialysis bag of 1000 dA, and a water was changed once every 4h, and the Cqd solid powder was obtained.

[0043] (2) Weigh 0.2475 g of zirconium chloride, 0.1924 g 2-amino terephthalic acid, after ultrasonic dissolution in 50 ml n, N-dimethylformamide solution, add 0.002 g of CQD, continue to ultrasound to completely dissolve, The mixture was transferred to a 100 mL of the high pressure reactor at 120 ° C for 24 h, and after cooling to room temperature, the resulting sample was centrifuged with N, N-dimethylformamide and met...

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Abstract

The invention discloses a CQD / UiO-66 composite photocatalytic material, and a preparation method and application thereof, and belongs to the field of preparation of photocatalytic materials. The preparation method comprises the following steps: crushing a biomass material to obtain biomass material powder, uniformly dispersing the obtained biomass material powder and urea in water, and continuously carrying out hydrothermal reaction to obtain a reaction solution; carrying out filtration dialysis treatment on the obtained reaction solution, and then carrying out freeze drying to obtain CQD; dissolving zirconium tetrachloride and 2-aminoterephthalic acid in a solvent to obtain a solution A; and dissolving the obtained CQD in the obtained solution A to obtain a mixed solution, carrying out solvothermal reaction on the obtained mixed solution to obtain a solid product after the solvothermal reaction is finished, and separating and purifying the obtained solid product to obtain the CQD / UiO-66 composite photocatalytic material. The CQD / UiO-66 composite photocatalytic material with better photocatalytic activity is prepared by the preparation method which is simple to operate, and can be applied to the aspect of photocatalytic reduction of hexavalent chromium.

Description

Technical field [0001] The present invention belongs to the field of photocatalytic material, and it is directed to a CQD / UIO-66 composite photocatalytic material and a preparation method thereof. Background technique [0002] Chromium is a typical heavy metal contaminant that causes water pollution, which exists in nature, two valence, hexagonal chromium Cr (VI) and three-poble chromium Cr (III). It has highly toxic, potentially carcinogenic and non-degrading, which makes a serious threat to the ecosystem and organisms, and has been included in the list of key pollutants. Treatment for industrial Cr (VI) contaminated water can generally be divided into two categories: one is to remove Cr (Vi) in wastewater into dissolved Cr (III) from wastewater. Application methods such as chemical reduction precipitation, ferrite methods, electrolysis, etc., such methods are suitable for treatment of high concentrations of Cr (V1) wastewater. The second is to concentrate and separate Cr (VI)...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/10C02F1/30C02F101/22
CPCB01J31/1691B01J31/223C02F1/30B01J2531/48C02F2305/10C02F2101/22B01J35/39B01J35/61
Inventor 强涛涛尉梦笛
Owner SHAANXI UNIV OF SCI & TECH
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