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Nanoscale tio2/carbon airgel electrode with high {001} crystal plane exposure ratio and its preparation method and application

A carbon airgel and nano-scale technology, which is applied in separation methods, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of difficult recovery of catalysts, non-reusable conductivity, and restrictions on the application of photocatalytic oxidation technology. To achieve the effect of improving the performance of photocatalytic oxidation

Inactive Publication Date: 2019-05-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While anatase {001}TiO 2 In the catalytic process of the liquid phase system, there are often problems that the catalyst is difficult to recycle, cannot be reused and has poor conductivity, which limits the application of photoelectric catalytic oxidation technology.

Method used

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  • Nanoscale tio2/carbon airgel electrode with high {001} crystal plane exposure ratio and its preparation method and application
  • Nanoscale tio2/carbon airgel electrode with high {001} crystal plane exposure ratio and its preparation method and application
  • Nanoscale tio2/carbon airgel electrode with high {001} crystal plane exposure ratio and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A Nanoscale H-{001}TiO 2 The preparation method of / CA electrode specifically comprises the following steps:

[0039] Slowly drop 0.6ml of hydrofluoric acid solution (40%, w / w%) into 5mL tetrabutyl titanate, stir with a magnetic stirrer during the dropwise addition, and transfer it to 30mL polytetrafluoroethylene Lined stainless steel reactor, placed in 180 ℃ oven for 24h. After the reaction, the reactor was cooled to room temperature, the product was centrifuged, and washed three times with deionized water and ethanol. After cleaning, the powder was dried at 80 °C for 12 h to obtain nano-sized TiO with a high proportion of {001} crystal faces. 2 . Using CA as cathode and titanium plate as anode, ultrasonically disperse 40mg nanoscale H-{001}TiO 2 10 mg of iodine is deposited in 50 mL of acetone for 30 min at a voltage of 15 V. After the deposition, the electrodes were taken out and dried at 60 °C for 12 h. Preparation of Nanoscale H-{001}TiO 2 / CA electrode.

[...

Embodiment 2

[0042] Nanoscale H-{001}TiO prepared by Example 1 2 / CA electrode photoelectrically degrades bisphenol A simulated wastewater efficiently, and the specific steps include the following:

[0043] The degradation experiment of bisphenol A was carried out in a circular electrochemical reaction cell, and a cup with circulating water was added to keep the constant temperature of the reaction system at 25°C. Using a three-electrode degradation system, nanoscale H-{001}TiO 2 The / CA electrode is the anode, the platinum sheet is the cathode, the distance between the cathode and the anode is 1cm, and the effective photoanode area is 1.5×2.5cm -2 . Use 0.1mol·L -1 Sodium sulfate deionized aqueous solution prepared bisphenol A into simulated wastewater with a concentration of 10mg / L, and the treatment volume was 100mL. Simulated sunlight as the light source, the light intensity is 100μW / cm 2 , apply a bias +0.9V (relative to the saturated calomel electrode), take samples at regular i...

Embodiment 3

[0046] This example is basically the same as Example 1, except that in this example, 0.6ml of hydrofluoric acid solution (40%, w / w%) is slowly dropped into 4mL of tetrabutyl titanate, and Stir with a magnetic stirrer, transfer to a 30mL polytetrafluoroethylene-lined stainless steel reaction kettle after the dropwise addition, and place in an oven at 200°C for 20h. After the reaction, the reactor was cooled to room temperature, the product was centrifuged, and washed three times with deionized water and ethanol. After cleaning, the powder was dried at 60 °C for 24 h to obtain nanoscale TiO with a high proportion of {001} crystal planes. 2 (nanoscale H-{001}TiO 2 ). Using CA as cathode and titanium plate as anode, ultrasonically disperse 50mg nanoscale H-{001}TiO 2 1. 15 mg of iodine element was deposited in 100 mL of acetone for 30 min at a voltage of 10 V. After the deposition, the electrodes were taken out and dried at 80 °C for 12 h. Preparation of Nanoscale H-{001}TiO...

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Abstract

The invention relates to a nanoscale TiO2 / carbon aerogel electrode high in {001} crystal face exposure proportion and a preparation method and application thereof .The preparation method comprises the steps of taking carbon aerogel as a substrate, and preparing the nanoscale TiO2 / carbon aerogel electrode high in {001} crystal face exposure proportion in an electrophoresis deposition solution formed by an acetone solution where nanoscale TiO2 sheets and iodine simple substances are dispersed through an electrophoretic deposition method .The obtained electrode comprises the carbon aerogel substrate, and the surface and the interiors of pore channels of the carbon aerogel substrate are loaded with the nanoscale TiO2 sheets high in {001} crystal face exposure proportion .The electrode can be used for degrading bisphenol A in waste water through photoelectrocatalysis and oxidation .Compared with the prior art, the electrode prepared through the method has the advantages that the low anode potential is achieved, the solar energy utilization rate is raised, and efficient catalytic oxidation capability is achieved.

Description

technical field [0001] The invention belongs to the field of environmental pollution treatment technology and photoelectric catalysis, and specifically relates to a nano-scale TiO with a high exposure ratio of {001} crystal planes 2 / Carbon airgel electrode (nanoscale H-{001}TiO 2 / CA) and its preparation method and application. Background technique [0002] Bisphenol A (Bisphenol A, BPA), also known as phenol methane, is a commonly used raw material in industry, and is often used in the synthesis of polycarbonate and other materials. It has long been recognized in research that it has estrogen-like effects and is an endocrine disruptor. Scientific research shows that the trace amount of bisphenol A added in the production of baby feeding bottles may interfere with the growth and development of infants and young children, leading to endocrine disorders. [0003] Recognizing the hazards of bisphenol A and its widespread existence in nature, people have carried out many wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/467C02F1/46C02F1/72C02F1/58C02F1/30C02F1/469
CPCY02W10/37
Inventor 张亚男李剑贇赵国华
Owner TONGJI UNIV
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