Bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst preparation and application

A technology of biological carbon and quantum dots, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, water/sludge/sewage treatment, etc., can solve the problem of low light energy utilization rate of photocatalytic materials , complex synthesis process, low photocatalytic efficiency, etc., to achieve the effect of enhancing binding force, improving stability, and easy operation

Active Publication Date: 2018-02-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects existing in the prior art, such as: the existing photocatalytic material synthesis method is complex, the required raw materials are expensive, the prepared photocatalytic material has low light energy utilization rate, low photocatalytic efficiency, etc., the present invention Provide a kind of bamboo stem biological carbon quantum dot modification Bi 4 Ti 3 o 12 Composite photocatalyst, Bi modified with bamboo stem carbon quantum dots 4 Ti 3 o 12 , effectively increasing the Bi 4 Ti 3 o 12 photocatalytic activity

Method used

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  • Bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst preparation and application
  • Bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst preparation and application
  • Bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst preparation and application

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Experimental program
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Effect test

Embodiment 1

[0029] (1) Preparation of bamboo stem biocarbon quantum dots:

[0030] 3 g of bamboo stem powder was weighed and dispersed in 30 mL of deionized water, stirred evenly at room temperature to form a mixed solution, and then transferred into a 50 mL autoclave and heated at 200 °C for 24 h. After the reaction product was naturally cooled, the supernatant was centrifuged and dialyzed in a dialysis bag (molecular weight 8000-14000) for 24 h to obtain a bamboo stem biocarbon quantum dot solution, which was freeze-dried to obtain bamboo stem biocarbon quantum dots.

[0031] (2) Bi 4 Ti 3 o 12 Preparation of materials:

[0032] 0.93 g bismuth oxide and 0.244 g P 25 Fully grind evenly, put into tube furnace / muffle furnace, take 144 min from 30-800 ℃, calcine at 800 ℃, calcine for 3 h, cool naturally to get Bi 4 Ti 3 o 12 Material.

[0033] (3) Bamboo stem biocarbon quantum dots modified Bi 4 Ti 3 o 12 Preparation of composite photocatalyst:

[0034] Weigh 0.001 g of bamboo s...

Embodiment 2

[0038] (1) Preparation of bamboo stem biocarbon quantum dots:

[0039] 3 g of bamboo stem powder was weighed and dispersed in 30 mL of deionized water, stirred evenly at room temperature to form a mixed solution, and then transferred into a 50 mL autoclave and heated at 200 °C for 24 h. After the reaction product was naturally cooled, the supernatant was centrifuged and dialyzed in a dialysis bag (molecular weight 8000-14000) for 24 h to obtain a bamboo stem biocarbon quantum dot solution, which was freeze-dried to obtain bamboo stem biocarbon quantum dots.

[0040] (2) Bi 4 Ti 3 o 12 Preparation of materials:

[0041] 0.93 g bismuth oxide and 0.244 g P 25 Fully grind evenly, put into tube furnace / muffle furnace, take 144 min from 30-800 ℃, calcine at 800 ℃, calcine for 3 h, cool naturally to get Bi 4 Ti 3 o 12 Material.

[0042] (3) Bamboo stem biocarbon quantum dots modified Bi 4 Ti 3 o 12 Preparation of composite photocatalyst:

[0043] Weigh 0.003 g of bamboo s...

Embodiment 3

[0047] (1) Preparation of bamboo stem biocarbon quantum dots:

[0048] Weigh 3 g of bamboo stem powder and disperse it in 30 mL of deionized water, stir evenly at room temperature to form a mixed solution, then transfer it into a 50 mL autoclave and heat at 200 °C for 24 h. After the reaction product was naturally cooled, the supernatant was centrifuged and dialyzed in a dialysis bag (molecular weight: 8000-14000) for 24 hours to obtain a bamboo stem biocarbon quantum dot solution, which was freeze-dried to obtain bamboo stem biocarbon quantum dots.

[0049] (2) Bi 4 Ti 3 o 12 Preparation of materials:

[0050] 0.93 g bismuth oxide and 0.244 g P 25 Fully grind evenly, put into tube furnace / muffle furnace, take 144 min from 30-800 ℃, calcine at 800 ℃, calcine for 3 h, cool naturally to get Bi 4 Ti 3 o 12 Material.

[0051] (3) Bamboo stem biocarbon quantum dots modified Bi 4 Ti 3 o 12 Preparation of composite photocatalyst:

[0052] Weigh 0.009 g of bamboo stem bioc...

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Abstract

The invention belongs to the technical field of environment material preparation and particularly relates to bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst preparation andapplication. A bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst preparation method includes: firstly, taking bamboo stem powder as a carbon source to synthesize bamboo stem biochar quantum dot according to a hydrothermal method; secondly, calcining bismuth oxide and P25 in a tube furnace / muffle furnace to obtain a Bi4Ti3O12 material; finally, adding bamboo stem biochar quantum dots and Bi4Ti3O12 into a certain quantity of ethyl alcohol, ultrasonically treating, evaporate to dry ethyl alcohol, and calcining in the tube furnace to obtain a bamboo stem biochar quantum dot modified Bi4Ti3O12 composite photocatalyst. By adoption of bamboo stems as a biochar source for preparing the bamboo stem biochar quantum dots according to a one-step hydrothermal method, compared with a traditional process, the method has advantages of greenness, economy and environmental friendliness; the composite photocatalyst prepared according to the method is capable of effectively makinguse of visible light to degrade ciprofloxacin in antibiotic wastewater and has a promising application prospect in ciprofloxacin wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and in particular relates to biological carbon quantum dot modification of bamboo stem Bi 4 Ti 3 o 12 Preparation and application of composite photocatalysts. Background technique [0002] Antibiotics are chemical substances produced by certain microorganisms, 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. Among them, ciprofloxacin is a broad-spectrum antibacterial new drug developed at home and abroad in recent years, and a large amount of organic wastewater will be generated in the production process. Ciprofloxacin wastewater contains high-concentration organic substances such as finished antibiotic products and pharmaceutical intermediates, which have high antibacterial ability and are difficult...

Claims

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Application Information

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IPC IPC(8): B01J23/18C01B32/15C02F1/30C02F101/34C02F101/36C02F101/38C02F103/34
CPCC02F1/30B01J23/18C02F2101/38C02F2101/36C02F2101/34C02F2103/343C02F2305/023C02F2305/10B01J35/39
Inventor 刘锡清汪涛闫永胜李春香周志平
Owner JIANGSU UNIV
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