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Preparation method and application of composite photocatalyst of bamboo biochar with embedded CdSe quantum dots and Bi<12>TiO<20>

A biochar, quantum dot technology, applied in physical/chemical process catalysts, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of CdSe quantum dots easy to agglomerate, affect performance, and unstable.

Inactive Publication Date: 2017-10-03
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CdSe quantum dots are easy to agglomerate and unstable, which affects its performance

Method used

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  • Preparation method and application of composite photocatalyst of bamboo biochar with embedded CdSe quantum dots and Bi&lt;12&gt;TiO&lt;20&gt;
  • Preparation method and application of composite photocatalyst of bamboo biochar with embedded CdSe quantum dots and Bi&lt;12&gt;TiO&lt;20&gt;
  • Preparation method and application of composite photocatalyst of bamboo biochar with embedded CdSe quantum dots and Bi&lt;12&gt;TiO&lt;20&gt;

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of bamboo stem biochar:

[0034] Weigh 3g of bamboo stem powder and dissolve it in 30mL of deionized water to form a mixed solution, add 0.5g of citric acid to the above mixed solution, stir evenly at room temperature, then put the prepared precursor solution into a 50mL autoclave and heat at 200°C 4h. After natural cooling, the solution was suction-filtered, washed alternately with water and ethanol until the filtrate became clear, and dried in a vacuum oven to obtain bamboo stem biochar.

[0035] (2) Preparation of NaHSe precursor solution:

[0036] Weigh 0.0011mol of Se powder and 0.015mol of sodium borohydride into a glass reaction bottle, add deionized water to dissolve completely, magnetic stirring assists the reaction, and pass N through the whole process. 2 Protect until a white precipitate appears in the reaction, draw the supernatant liquid, which is the NaHSe precursor.

[0037] (3) Preparation of CdSe quantum dots embedded in bamboo stem bio...

Embodiment 2

[0044] (1) Preparation of bamboo stem biochar:

[0045] Weigh 3g of bamboo stem powder and dissolve it in 30mL of deionized water to form a mixed solution, add 0.5g of citric acid to the above mixed solution, stir evenly at room temperature, then put the prepared precursor solution into a 50mL autoclave and heat at 200°C 4h. After natural cooling, the solution was suction-filtered, washed alternately with water and ethanol until the filtrate became clear, and dried in a vacuum oven to obtain bamboo stem biochar.

[0046] (2) Preparation of NaHSe precursor solution:

[0047] Weigh 0.0011mol of Se powder and 0.015mol of sodium borohydride into a glass reaction bottle, add deionized water to dissolve completely, magnetic stirring assists the reaction, and pass N through the whole process. 2 Protect until a white precipitate appears in the reaction, draw the supernatant liquid, which is the NaHSe precursor.

[0048] (3) Preparation of CdSe quantum dots embedded in bamboo stem b...

Embodiment 3

[0055] (1) Preparation of bamboo stem biochar:

[0056] Weigh 3g of bamboo stem powder and dissolve it in 30mL of deionized water to form a mixed solution, add 0.5g of citric acid to the above mixed solution, stir evenly at room temperature, then put the prepared precursor solution into a 50mL autoclave and heat at 200°C 4h. After natural cooling, the solution was suction-filtered, washed alternately with water and ethanol until the filtrate became clear, and dried in a vacuum oven to obtain bamboo stem biochar.

[0057] (2) Preparation of NaHSe precursor solution:

[0058] Weigh 0.0011mol of Se powder and 0.015mol of sodium borohydride into a glass reaction bottle, add deionized water to dissolve completely, magnetic stirring assists the reaction, and pass N through the whole process. 2 Protect until a white precipitate appears in the reaction, draw the supernatant liquid, which is the NaHSe precursor.

[0059] (3) Preparation of CdSe quantum dots embedded in bamboo stem b...

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Abstract

The invention relates to processes of synthesizing Bi<12>TiO<20> by a solid state method, synthesizing bamboo biochar with embedded CdSe quantum dots by a water bath method and preparing a composite photocatalyst of bamboo biochar with embedded CdSe quantum dots and Bi<12>TiO<20> by a dipping method. The invention belongs to the technical field of ecomaterial preparation. The preparation method provided by the invention comprises preparation of bamboo biochar, preparation of the bamboo biochar with embedded CdSe quantum dots and preparation of Bi<12>TiO<20>. The specific steps are as follows: taking deionized water as a solvent and adding cadmium chloride, biochar and a stabilizer; performing stirring and adjusting the pH value of the solution; injecting a NaHSe precursor solution; introducing nitrogen gas; pouring the obtained solution into a three-mouth flask and performing heating; performing natural cooling; performing centrifugation, performing washing and drying to obtain the material of bamboo biochar with embedded CdSe quantum dots; soaking Bi<12>TiO<20> and the obtained material of bamboo biochar with embedded CdSe quantum dots into methanol; performing strong stirring; and performing drying to obtain the composite photocatalyst. The composite photocatalyst of the bamboo biochar with embedded CdSe quantum dots and Bi<12>TiO<20> prepared by the method provided by the invention can effectively use visible light to degrade tetracycline in antibiotic wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, in particular to CdSe quantum dots embedded in bamboo stem biochar and Bi 12 TiO 20 Preparation and application of composite photocatalysts. Background technique [0002] Antibiotics are chemical substances produced by certain microorganisms or animals and plants, substances that can inhibit the proliferation of microorganisms and other cells, and are widely used as drugs for treating various bacterial infections or inhibiting pathogenic microbial infections. In recent years, antibiotic compounds have been continuously detected in water, sediment and soil, becoming a new type of environmental pollutants. Also, antibiotics are widely used and continue to enter the environment, thereby appearing as a phenomenon of "false" persistence. In the environment, such pollutants may undergo a series of physical and chemical processes, thereby causing various ecological effects....

Claims

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Application Information

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IPC IPC(8): B01J27/057C02F1/30C02F1/72C02F1/74C02F101/38C02F101/34
CPCC02F1/30C02F1/725C02F1/74B01J23/002B01J27/057C02F2305/10C02F2101/34C02F2101/38B01J35/39
Inventor 王璐汪涛刘锡清马长畅刘洋闫永胜霍鹏伟
Owner JIANGSU UNIV
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