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SnO2-Fe2O3NTs (SnO2-Fe2O3 nanotubes) composite electrode and preparation method thereof

A composite technology of ferric oxide and nanotubes, which is applied in electrochemical water/sewage treatment, magnetic field/electric field water/sewage treatment, energy and wastewater treatment, etc., to achieve high order, good template effect, and efficient synergy.

Inactive Publication Date: 2012-10-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Zhao et al. used TiO 2 NTs as the substrate, Sb-doped SnO 2 Preparation of composite electrode material SnO for electrocatalyst 2 / TiO 2 NTs, but due to TiO 2 It does not respond to visible light, and can only realize ultraviolet photoelectric integrated catalytic oxidation

Method used

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  • SnO2-Fe2O3NTs (SnO2-Fe2O3 nanotubes) composite electrode and preparation method thereof
  • SnO2-Fe2O3NTs (SnO2-Fe2O3 nanotubes) composite electrode and preparation method thereof
  • SnO2-Fe2O3NTs (SnO2-Fe2O3 nanotubes) composite electrode and preparation method thereof

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Embodiment 1

[0027] A tin dioxide-ferric oxide nanotube composite electrode and a preparation method thereof, specifically comprising the following steps:

[0028] (1) Use 0.25mm iron sheet (99.9%) with 120 # , 320 # and 500 # Grinding with sandpaper, further polishing with metallographic sandpaper to make the surface of the substrate smooth, then ultrasonically cleaning in distilled water and acetone for 20 min, and cleaning with double distilled water. The composition of the anodizing electrolyte is 0.3wt% NH 4 F, 3%H 2 O, in a mixed solution with ethylene glycol as a solvent, with an iron sheet as the working electrode and a platinum sheet as the counter electrode, the voltage across both ends was controlled to be constant at 20V, the reaction temperature was constant at 25°C, and the electrochemical anodic oxidation treatment was performed for 5min. The prepared electrodes were heat-treated in a tube furnace using temperature programming at a temperature of 5 °C min -1 , the heat ...

Embodiment 2

[0035] Using the tin dioxide-ferric oxide nanotube composite electrode prepared in Example 1, the visible photoelectrocatalytic oxidation degradation dye methylene blue (MB) simulated dye wastewater.

[0036] The photocatalytic degradation is carried out in a single-cell semicircular electrochemical reaction cell, and a cup with circulating water is added to keep the temperature of the reaction system at room temperature. The prepared electrode is used as the anode, the titanium sheet is used as the counter electrode, the electrode spacing is 1 cm, and the electrode area is 6 cm. 2 , to contain 0.1mol L -1 Na 2 SO 4 20mg L of electrolytes -1 MB solution was used as a simulated dye wastewater, the reaction volume was 100mL, and the degradation current density was 5mA cm -2 , the visible light source is a light energy density of 100mW / cm 2 Visible light irradiation (λ > 420nm), samples were taken at different times during the degradation reaction for analysis. The immediat...

Embodiment 3

[0038] Using the tin dioxide-ferric oxide nanotube composite electrode prepared in Example 1, it can be seen that photoelectric catalytic oxidation degrades 2,4,6-trichlorophenol (TCP) simulated wastewater that is difficult to biochemically oxidize.

[0039] The photocatalytic degradation is carried out in a single-cell semicircular electrochemical reaction cell, and a cup with circulating water is added to keep the temperature of the reaction system at room temperature. The prepared electrode is used as the anode, the titanium sheet is used as the counter electrode, the distance between the electrodes is 1 cm, and the electrode area is 8 cm. 2 , to contain 0.1mol L -1 Na 2 SO 4 100mg L of electrolyte -1 TCP solution was used as a simulated dye wastewater, the reaction volume was 100ml, and the degradation current density was 10mA cm -2 , the visible light source is a light energy density of 100mW / cm 2Visible light irradiation (> 420nm), samples were taken and analyzed at...

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Abstract

The invention relates to an SnO2-Fe2O3NTs composite electrode and a preparation method thereof. The inner layer of the electrode is an Fe base, the surface layer of the electrode is a composite layer of SnO2 and Fe2OeNTs, and the SnO2-Fe2O3NTs composite electrode is obtained through loading a tin alkoxide sol on the array surfaces of Fe-based Fe2O3NTs prepared through carrying out anodization treatment. The composite electrode prepared in the invention has the characteristics of large SnO2 load capacity, small particle diameter, tight combination with the Fe-based Fe2O3NTs skeleton, smooth and flattened electrode surfaces, strong visible light response, excellent electrocatalytic performance, high photoelectric synergetic catalysis efficiency, stable chemical performances, simple preparation technology and low manufacturing cost, can be efficiently used for the degrading treatment of dye wastewater and organic wastewater which is difficult to biochemically oxidize, and has wide economic and social benefits.

Description

technical field [0001] The invention relates to the technical fields of material chemistry, environmental chemistry and photoelectric catalysis, in particular to a tin dioxide-ferric oxide nanotube composite electrode material with visible photoelectric integrated catalytic function and its preparation method, and also relates to its application in organic Visible photoelectric integrated synergistic catalytic oxidation degradation technology method of wastewater. Background technique [0002] As two different advanced oxidation technologies, electrocatalysis and photocatalysis are applied to the degradation treatment of organic wastewater by more and more environmental scientists. Both photocatalysis and electrocatalysis have distinct catalytic properties and different forms of energy conversion. If these two advanced oxidation technologies can be realized on the same electrode surface at the same time, it is expected to achieve a synergistic effect between the two catalyt...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F1/48
CPCY02W10/37
Inventor 赵国华柴守宁张重宁雷燕竹
Owner TONGJI UNIV
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