Application of a Small Size {001}tio2/Carbon Airgel Electrode

A carbon aerogel, small-scale technology, applied in the fields of pollution control and material chemistry, can solve problems such as limitations, and achieve the effects of improved activity, fast and efficient catalytic degradation, and good electrical conductivity

Inactive Publication Date: 2016-01-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the limited geometric configuration of truncated tetragonal bipyramid and the specific growth direction of {001} crystal plane, the current preparation of {001} TiO 2 The method is often obtained in the liquid phase system, the macroscopic structure is mostly powder or granular, and TiO is rarely grown on the surface of the electrode. 2 {001} crystal facets, via electrochemical assistance in TiO 2 The application of photocatalytic methods based on {001} facets is limited.

Method used

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  • Application of a Small Size {001}tio2/Carbon Airgel Electrode
  • Application of a Small Size {001}tio2/Carbon Airgel Electrode
  • Application of a Small Size {001}tio2/Carbon Airgel Electrode

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Embodiment 1

[0031] Small-sized {001} TiO grown on the surface of a high-surface-area carbon aerogel 2 The preparation method of nanocrystalline electrode specifically comprises the following steps:

[0032] Weigh an appropriate amount of formaldehyde, resorcinol, resorcinol: formaldehyde: water: Na 2 CO 3The molar ratio is 1:2:17.5:0.0008 and mixed evenly. Put it into a mold, seal it and place it in an oven. Control the temperature at 30°C and 50°C for one day, and at 90°C for three days to carry out polymerization reaction to obtain organic RF wet gel. Polish the wet gel until the surface is dull. . Soak the obtained wet gel with acetone to replace the moisture in the wet gel network structure, soak the sample for 3 days, and replace fresh acetone every day to completely replace the moisture in the sample. Then dry at room temperature and normal pressure, and obtain a brown-yellow massive organic airgel with a complete structure after the acetone is completely volatilized. The RF or...

Embodiment 2

[0038] A small size {001} TiO 2 / Carbon airgel electrode for photocatalytic degradation of organic pollutant wastewater with {001}TiO 2 / The carbon airgel electrode is used as the anode, the platinum sheet is used as the cathode, and the saturated calomel electrode is used as the reference electrode, using a three-electrode system, applying a bias voltage of +0.6V, and a light intensity of 25mW / cm 2 , UV photodegradation of methylene blue dye wastewater with a concentration of 50mg / L.

[0039] {001}TiO 2 The preparation method of the carbon airgel electrode is as follows:

[0040] (1) Adopt formaldehyde, resorcinol, water and sodium carbonate to prepare organic wet gel:

[0041] Mix formaldehyde, resorcinol, water and sodium carbonate evenly, put it into a mold, seal it and put it in an oven for polymerization reaction, adopt temperature programming, keep it at 30°C for 24h, at 50°C for 24h, at 90°C Insulate for 72 hours to obtain organic wet gel, polish the organic wet ge...

Embodiment 3

[0053] A small size {001} TiO 2 / Application of carbon airgel electrodes to {001}TiO 2 / The carbon airgel electrode is used as the anode, the platinum sheet is used as the cathode, and the saturated calomel electrode is used as the reference electrode, using a three-electrode system, applying a bias voltage of +0.7V, and a light intensity of 30mW / cm 2 , UV photodegradation of methylene blue dye wastewater with a concentration of 80mg / L. Among them, {001}TiO 2 / TiO on Carbon Airgel Electrode 2 A truncated tetragonal bipyramid with exposed {001} crystal faces of 100 nm in size.

[0054] {001}TiO 2 The preparation method of the carbon airgel electrode is as follows:

[0055] (1) Adopt formaldehyde, resorcinol, water and sodium carbonate to prepare organic wet gel:

[0056] Mix formaldehyde, resorcinol, water and sodium carbonate evenly, put it into a mold, seal it and put it in an oven for polymerization reaction, adopt temperature programming, keep it at 30°C for 24h, at ...

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Abstract

The present invention relates to an application of a small size {001} TiO2 / carbon aerogel electrode, wherein a {001} TiO2 / carbon aerogel electrode is adopted as a working electrode, a three-electrode system is adopted to carry out constant potential photoelectrocatalysis oxidative degradation on methylene blue dye wastewater, and TiO2 on the {001} TiO2 / carbon aerogel electrode has a size of 50-150 nm and has a {001} crystal face exposed truncated tetragonal biconical shape. Compared with the application in the prior art, the application of the present invention has the following characteristics that: the carbon aerogel electrode is adopted as the matrix material, and a hydrothermal method is adopted to grow the TiO2 nanometer crystal having the exposed {001} crystal face, such that the excellent performance of the TiO2 having the exposed {001} crystal face is maintained, the photoelectrocatalysis activity of the electrode can be further enhanced by adopting the excellent electrochemical property of the carbon aerogel electrode, and the small size {001} TiO2 / carbon aerogel electrode is suitable for the field of photoelectrocatalysis degradation of environmental pollutants.

Description

technical field [0001] The present invention relates to the fields of pollution control and materials chemistry, and in particular to a small-sized {001} TiO 2 / Application of carbon airgel electrodes. Background technique [0002] As a new type of environmental pollutant degradation technology, semiconductor photocatalysis has attracted extensive attention. especially TiO 2 Photocatalytic technology has become one of the most effective catalysts in the treatment of refractory pollutants due to its non-toxic, low cost, strong oxidizing ability, stable photochemical properties, and resistance to chemical and photocorrosion. Improve TiO through various ways 2 The photon quantum efficiency has always been one of the hot spots and difficulties in photocatalyst research. Recent studies have shown that clean anatase TiO 2 The {001} crystal plane, with a higher surface energy (0.90J m-2), is more than twice that of the {101} crystal plane (0.44J m-2), which exhibits the highe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/32C02F1/72C02F1/469
Inventor 赵国华金烨飞张亚男
Owner TONGJI UNIV
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