Biomass carbon dot/wood composite photocatalytic material and preparation method and application thereof

A technology of composite photocatalysis and biomass carbon, which is applied in the field of photocatalytic materials, can solve the problems of difficult recovery of metal components, difficulty in realizing industrialization, complicated process, etc., and achieve the effect of simple operation, efficient degradation and simple operation

Active Publication Date: 2021-01-05
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of these composite materials with photocatalytic properties involves multiple steps, the process is complex and difficult to achieve industrialization
Also, the biggest limitation encountered when using these composite materials is that the metal components are difficult to recycle and pose new pollution risks to the environment

Method used

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  • Biomass carbon dot/wood composite photocatalytic material and preparation method and application thereof
  • Biomass carbon dot/wood composite photocatalytic material and preparation method and application thereof
  • Biomass carbon dot/wood composite photocatalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0033] Dilute H with a mass fraction of 1% 2 SO 4 , under the condition of 60°C, the wood powder was pretreated for 1h, then adding NaOH with a mass fraction of 10%, the solid-to-liquid ratio was 1:12 (g:mL), and the wood powder was leached at 110°C Suction filtration, adjust the pH of the filtrate to neutral with HCl with a concentration of 6 mol / L. Then heat and evaporate the water in the filtrate in a boiling water bath, after cooling, add a certain amount of ethanol with a mass fraction of 95%, and precipitate to obtain xylose. Accurately weigh 0.2 g of xylose, and fully dissolve it in 10 mL of 2% thionyl chloride solution by volume to form an initial mixed solution. The mixed solution was subjected to hydrothermal treatment, the treatment temperature was set at 200° C., and the treatment time was 6 hours. After the reaction was completed and cooled to room temperature, a yellow liquid product was obtained. The product is centrifuged and dialyzed to remove large carbon ...

specific Embodiment 2

[0036] Dilute H with a mass fraction of 1% 2 SO 4, under the condition of 60°C, the wood powder was pretreated for 1h, then adding NaOH with a mass fraction of 10%, the solid-to-liquid ratio was 1:12 (g:mL), and the wood powder was leached at 110°C Suction filtration, adjust the pH of the filtrate to neutral with HCl with a concentration of 6 mol / L. Then heat and evaporate the water in the filtrate in a boiling water bath, after cooling, add a certain amount of ethanol with a mass fraction of 95%, and precipitate to obtain xylose. Accurately weigh 0.1 g of xylose, and fully dissolve it in 10 mL of 5% thionyl chloride solution by volume to form an initial mixed solution. The mixed solution was subjected to hydrothermal treatment, the treatment temperature was set at 160° C., and the treatment time was 8 hours. After the reaction was completed, after cooling to room temperature, a yellow liquid product was obtained. The product is centrifuged and dialyzed to remove large carb...

specific Embodiment 3

[0038] Dilute H with a mass fraction of 1% 2 SO 4 , under the condition of 60°C, the wood powder was pretreated for 1h, then adding NaOH with a mass fraction of 10%, the solid-to-liquid ratio was 1:12 (g:mL), and the wood powder was leached at 110°C Suction filtration, adjust the pH of the filtrate to neutral with HCl with a concentration of 6 mol / L. Then heat and evaporate the water in the filtrate in a boiling water bath, after cooling, add a certain amount of ethanol with a mass fraction of 95%, and precipitate to obtain xylose. Accurately weigh 0.3g of xylose, and fully dissolve it in 10mL of 1% thionyl chloride solution by volume to form an initial mixed solution. The mixed solution was subjected to hydrothermal treatment, the treatment temperature was set at 220° C., and the treatment time was 4 hours. After the reaction was completed and cooled to room temperature, a yellow liquid product was obtained. The product is centrifuged and dialyzed to remove large carbon pa...

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Abstract

The invention discloses a preparation method of a biomass carbon dot / wood composite photocatalytic material. The preparation method comprises the following steps: S01, treating wood flour to obtain xylose, S02, taking the obtained xylose as a carbon source substance and thionyl chloride as a sulfur and chlorine co-doping agent, fully dissolving the xylose and the thionyl chloride into deionized water, uniformly mixing to form an initial substance, and then transferring the initial substance into a hydrothermal reaction kettle, S03, after the reaction of the initial substance is finished and the initial substance is cooled to room temperature, centrifuging the obtained reaction solution, transferring the centrifuged reaction solution into a cellulose dialysis bag for dialysis treatment, andfreeze-drying the purified biomass carbon dot solution to obtain a pure biomass carbon dot solid, and S04, loading the biomass carbon dots on the wood veneer. The invention further discloses the biomass carbon dot / wood composite photocatalytic material and an application thereof. According to the biomass carbon dot / wood composite photocatalytic material and the preparation method and applicationthereof, the preparation process is simple, industrial production can be realized, and the biomass carbon dot / wood composite photocatalytic material has the advantages of no pollution and recyclability.

Description

technical field [0001] The invention relates to a biomass carbon point / wood composite photocatalytic material and a preparation method and application thereof, belonging to the technical field of photocatalytic materials. Background technique [0002] As a novel low-cost carbon nanomaterial, carbon dots have the advantages of stable optical properties, low toxicity, easy preparation and easy functionalization, and have been proven to have potential applications in the fields of photovoltaics, sensors, fluorescent probes and bioimaging. prospect. In these advanced applications, due to the unique photoelectric properties of carbon dots, many important progresses have been made in the research of carbon dots in the field of photocatalytic degradation. Photocatalysis is based on the redox ability of the catalyst under the condition of light, so as to achieve the purpose of purifying pollutants, mild production and transformation, such as the photodegradation process of environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02B01J21/18B01J31/02B01J37/10B01J37/02B01J37/06C02F1/30C13K13/00C09K11/65C02F101/30C02F101/36C02F101/38
CPCB01J27/02B01J21/18B01J37/10B01J35/004B01J31/069B01J37/0201B01J37/06C02F1/30C13K13/002C09K11/65C02F2101/30C02F2101/36C02F2101/38C02F2101/40C02F2305/10C02F2101/308Y02W10/37
Inventor 周晓燕朱子琪杨培陈敏智陈卫民李兴会罗敏汤淼
Owner NANJING FORESTRY UNIV
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