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Preparation method of carbon aerogel loaded titanium dioxide electrodes and application thereof

A carbon airgel and titanium dioxide technology, applied in the field of water treatment, can solve the problems of low photocatalytic degradation treatment efficiency, achieve the effects of increasing the photocatalytic reaction rate, accelerating the photocatalytic degradation reaction rate, and large specific surface area

Inactive Publication Date: 2012-07-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For dye wastewater with deep color and poor light transmission, the efficiency of photocatalytic degradation treatment is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of carbon airgel

[0032] The sol-gel phenolic polymerization method uses resorcinol and formaldehyde as raw materials and sodium carbonate as a catalyst to obtain a phenolic resin with a network structure at a molar ratio of 1:2:50:17.5; The appearance size of the electrode material is required to prepare the mold. The mold is generally made of glass. According to the thickness of the required electrode, adjust the spacing distance to obtain a phenolic resin sheet that meets the requirements, and the thickness is controlled at 5mm. The bulk phenolic resin obtained after standing still was subjected to solvent replacement in acetone with low surface tension for 5 days, and the water molecules in the network structure were replaced by acetone, and then dried at room temperature for about 5 days. The dried airgel was heated up to 950 °C in a tube furnace and kept for 4 h for carbonization to obtain black blocky carbon aerogel.

[0033] (2) Preparation of bu...

Embodiment 2

[0040] (1) Preparation of carbon airgel

[0041] Sol-gel phenolic polymerization method, using resorcinol and formaldehyde as raw materials, absolute ethanol as catalyst, and standing at a molar ratio of 1:2:300:17.5 to obtain phenolic resin with a network structure; according to experimental requirements The appearance size of the required electrode material prepares the mold. The mold is generally made of glass. According to the thickness of the required electrode, adjust the spacing distance to obtain a phenolic resin sheet that meets the requirements, and the thickness is controlled at 8mm. The bulk phenolic resin obtained after standing still was subjected to solvent replacement in acetone with low surface tension for 5 days, and the water molecules in the network structure were replaced by acetone, and then dried at room temperature for about 5 days. The dried airgel was heated up to 950 °C in a tube furnace and kept for 4 h for carbonization to obtain black blocky carbo...

Embodiment 3

[0048] Example 3: CA / TiO 2 Electroadsorption-assisted photocatalytic degradation of high-chroma methylene blue wastewater

[0049] Electrosorption device adopts: CA / TiO connected with platinum wire 2 As the working electrode, the platinum sheet was used as the counter electrode, and the saturated calomel electrode was used as the reference electrode. The required micro-electric field was provided by electrochemical constant potential, and the electrosorption-assisted photocatalytic degradation experiment was carried out under ultraviolet light irradiation. In the experiment, the volume of the simulated wastewater solution is 40-1000ml, and the constant potential voltage is controlled at ±200-±600mV.

[0050] The initial concentration of the water sample is 0.01mol / L H in 150mg / L methylene blue 2 SO 4 In the supporting electrolyte, the volume is 85ml, and the CA / TiO used as the working electrode and the counter electrode respectively 2 Both the electrode and the platinum el...

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Abstract

The invention belongs to the technical field of water processing, in particular relates to a preparation method of carbon aerogel load titanium dioxide electrodes and application thereof. The specific steps are as follows: preparation of carbon aerogel, preparation of butyl carbonate sol, load and sintering of butyl carbonate sol gel, thereby obtaining required product. The electrode has the advantages of high porosity, big specific surface, high electrical conductivity, controlled face shaping, strong photocatalytic activity, and the like, and is applied to processing high-chroma dye waste water by electrochemical absorption fill light catalytic degradation. The CA / TiO2 in the invention has good electric absorption performance and photocatalytic activity; with the auxiliary strengthening effect of electric absorption, the concentration range of colored dye waste water degradation removal is wide (100 mg / L to 1000 mg / L); and the removing speed can be improved more than 3 times compared with photocatalytic degradation. The technology has simple and convenient operation and good processing effect for pollutant waste water, is a high-efficient and energy-saving new technology, and has very great application value in the field of waste water processing.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method and application of a carbon airgel-loaded titanium dioxide electrode. Background technique [0002] With the development of dye industries such as plastics, rubber, fibers, coatings and printing inks, the output of organic dyes continues to increase, and the amount of wastewater discharge is also increasing. Therefore, the problem of colored wastewater pollution is becoming more and more serious. This type of wastewater has deep color, toxicity Large size and difficult biodegradation. In recent years, using semiconductor particles as catalysts to photodegrade colored wastewater has become an international research hotspot. where TiO 2 Due to its low toxicity, stability and strong catalytic ability, it has become the most widely used photocatalyst. For dye wastewater with deep color and poor light transmission, the efficiency of photocat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/00C02F1/32C02F103/30
CPCY02P20/10
Inventor 赵国华金宇宁吴梅芬
Owner TONGJI UNIV
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