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Preparation method of titanium dioxide/porous carbon supported composite photocatalyst

A technology of titanium dioxide and porous carbon, which is applied in the field of photocatalytic material preparation, can solve the problems of low stability and poor photodegradation ability, and achieve the effects of improved dispersion, effective degradation, and significant degradation effect

Pending Publication Date: 2022-03-11
XIAN UNIV OF TECH
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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 provide a preparation method of titanium dioxide / porous carbon-supported composite photocatalyst, which solves the problems of poor photodegradability and low stability of existing photocatalysts

Method used

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  • Preparation method of titanium dioxide/porous carbon supported composite photocatalyst
  • Preparation method of titanium dioxide/porous carbon supported composite photocatalyst
  • Preparation method of titanium dioxide/porous carbon supported composite photocatalyst

Examples

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Effect test

Embodiment 1

[0036] The preparation method of the titanium dioxide / porous carbon supported composite photocatalyst of the present invention is specifically:

[0037] First weigh 10g of discarded coffee grounds and transfer it to a corundum boat, then put the corundum boat into the muffle furnace, set the temperature rise program, the temperature rise rate is 5°C / min, raise the temperature to 1000°C, keep it warm for 2 hours, and pass nitrogen, The nitrogen flow rate was 40 mL / min, and cooled to room temperature to obtain a porous carbon material. After that, 4 mL of tetrabutyl titanate was weighed, dissolved in 20 mL of absolute ethanol, and then 0.1 g of porous carbon material and 20 mL of glacial acetic acid were weighed, added to the above mixture and stirred at room temperature for 2 h. Then add the mixed solution into a hydrothermal autoclave lined with tetrachlorethylene, put the hydrothermal autoclave into an oven and heat it to 150°C for a heating time of 8 hours. Washing and dryi...

Embodiment 2

[0041] The preparation method of the titanium dioxide / porous carbon supported composite photocatalyst of the present invention is specifically:

[0042] First weigh 10g of waste coffee grounds and transfer it to a corundum boat, then put the corundum boat into the muffle furnace, set the temperature rise program, the temperature rise rate is 5°C / min, raise the temperature to 900°C, keep it warm for 1.5h, and pass in nitrogen. The nitrogen flow rate was 40 mL / min, and cooled to room temperature to obtain a porous carbon material. After that, 5 mL of tetrabutyl titanate was weighed, dissolved in 25 mL of absolute ethanol, and then 0.5 g of porous carbon material and 20 mL of glacial acetic acid were weighed, added to the above mixture and stirred at room temperature for 2 h. Then add the mixed solution into a hydrothermal autoclave lined with tetrachlorethylene, put the hydrothermal autoclave into an oven and heat it to 180°C for a heating time of 8 hours. Washing and drying at...

Embodiment 3

[0045] The preparation method of the titanium dioxide / porous carbon supported composite photocatalyst of the present invention is specifically:

[0046] First weigh 10g of discarded coffee grounds, and transfer it to a corundum boat, then put the corundum boat into the muffle furnace, set the temperature rise program, the temperature rise rate is 5°C / min, raise the temperature to 700°C, keep it warm for 2 hours, and pass nitrogen, nitrogen The flow rate was 40 mL / min, and cooled to room temperature to obtain a porous carbon material. After that, 5 mL of tetrabutyl titanate was weighed, dissolved in 25 mL of absolute ethanol, and then 1 g of porous carbon material and 20 mL of glacial acetic acid were weighed, added to the above mixture and stirred at room temperature for 2 h. Then add the mixed solution into a hydrothermal autoclave lined with tetrachlorethylene, put the hydrothermal autoclave into an oven and heat it to 200°C for a heating time of 8 hours. Washing and drying...

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Abstract

The invention discloses a preparation method of a titanium dioxide / porous carbon supported composite photocatalyst, which specifically comprises the following steps: carbonizing, cleaning and drying coffee grounds to obtain carbonized coffee grounds; dissolving tetrabutyl titanate in absolute ethyl alcohol, adding a glacial acetic acid solution and the carbonized coffee grounds, stirring, carrying out hydrothermal treatment, and finally cleaning and drying to obtain a hydrothermal product; and calcining the hydrothermal product, adding the TiO2 / porous carbon material and AgNO3 into deionized water, stirring, irradiating the suspension under a xenon lamp, filtering, cleaning, and drying to obtain the titanium dioxide / porous carbon supported composite photocatalyst. Coffee grounds are used for preparing porous carbon, the dispersity of nano TiO2 is improved, meanwhile, Ag is used for decorating nano TiO2, electron distribution in the catalyst can be affected, the surface property of the catalyst is promoted to be changed, dye in sewage is effectively adsorbed, and meanwhile the remarkable adsorption effect on antibiotics is achieved.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and in particular relates to a preparation method of titanium dioxide / porous carbon supported composite photocatalyst. Background technique [0002] Environmental pollution and the depletion of fossil energy are major problems faced by human beings in this century and urgently need to be overcome. Among them, the wastewater of organic dyes and colorless pharmaceutical pollutants is discharged into rivers, which seriously threatens human beings and ecosystems, and it is urgent to purify them. Although traditional pollution control methods, including precipitation, adsorption, coagulation, electrodialysis, filtration, incineration, landfill and ion exchange, have certain effects, they also have defects such as low treatment efficiency and easy to cause secondary pollution, making it difficult to be effective Remove or transform these contaminant residues. [0003] Photo...

Claims

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Application Information

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IPC IPC(8): B01J23/50C02F1/30C02F101/30
CPCB01J23/50C02F1/30C02F2101/308C02F2305/10B01J35/39
Inventor 任鹏刚汤雯雯王佳一靳彦岭侯鑫
Owner XIAN UNIV OF TECH
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