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High-efficiency long-life antimony doped tin oxide electrode with three-dimensional structure

A technology of antimony-doped tin oxide and three-dimensional structure, applied in chemical instruments and methods, water treatment parameter control, water pollutants, etc., can solve the problems of poor catalytic activity of electrodes, short life of ATO electrodes, etc., and achieve the goal of improving electrode performance damage, increase in electrochemically active sites, and overcome the effect of low modification

Active Publication Date: 2019-10-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the problems of short life of ATO electrodes and relatively poor catalytic activity of the electrodes in the prior art, and provide a three-dimensional antimony-doped tin oxide electrode with high efficiency and long life.

Method used

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  • High-efficiency long-life antimony doped tin oxide electrode with three-dimensional structure
  • High-efficiency long-life antimony doped tin oxide electrode with three-dimensional structure
  • High-efficiency long-life antimony doped tin oxide electrode with three-dimensional structure

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specific Embodiment 1

[0034] A three-dimensional antimony-doped tin oxide electrode with an internal pore size of 50 μm, a thickness of 0.8 mm, and a porosity of 85% was used for SEM characterization, XRD characterization, methylene blue simulated wastewater degradation test, and accelerated life test of the electrode. The amount of modification of the electrode antimony-doped tin oxide catalyst is about 30mg / cm 2 ; The doping ratio of antimony relative to tin in the catalyst is about 5%; the preparation process is the same as Example 1.

[0035] Characterization of the electrode of the present invention: the surface and section morphology of the electrode is examined by scanning electron microscopy. The catalytic layer on the surface of the electrode is formed by the close connection of nanoparticles with a size of about 50 nm ( figure 1 ), the nano-sized catalyst particles have a high specific surface area, which is beneficial to expose more active sites; the tight connection of the catalyst can...

specific Embodiment 2

[0039] A three-dimensional ATO electrode based on titanium foam with an internal pore size of 150 μm, a thickness of 1.5 mm, and a porosity of 75% was used for SEM characterization, methylene blue simulated wastewater degradation test, and electrode accelerated life test. The amount of modification of the electrode antimony-doped tin oxide catalyst is about 70mg / cm 2 ; The antimony doping ratio is about 20% (relative to Sn); the preparation process is the same as Example 2.

[0040] Use scanning electron microscope to observe the surface and interior of the electrode, such as figure 2 As shown, the interior of titanium foam is full of micro-voids, which can provide a large area of ​​attachment sites for the catalyst. The thermal deposition method can also attach catalyst particles with a size of about 50 nm inside and on the surface of titanium foam to form a three-dimensional antimony-doped tin oxide electrode. , The nano-sized catalyst particles have a high specific surfac...

specific Embodiment 3

[0044] A three-dimensional ATO electrode based on titanium foam with an internal pore diameter of 200 μm, a thickness of 5 mm, and a porosity of 65% was used to conduct methylene blue simulated wastewater degradation tests and electrode accelerated life tests. The modified amount of the electrode is about 190mg / cm 2 ; The antimony doping ratio is about 20% (relative to Sn); the preparation process is the same as Example 3.

[0045] The degradation test procedure of methylene blue simulated wastewater is the same as in specific embodiment 1, and the degradation rate constant of methylene blue simulated wastewater treated by the electrode of the present invention has reached 1.13h -1 .

[0046] The experimental procedure of the accelerated test of the electrode is the same as that of the specific embodiment 1, and the accelerated life test of the electrode of the present invention reaches 300h.

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Abstract

The invention relates to the technical field of building materials and aims to provide a high-efficiency long-life antimony doped tin oxide electrode with a three-dimensional structure. The electrodeuses foamed titanium rich in micron pores as a base material, and nano-sized antimony doped tin oxide catalyst particles are uniformly and densely loaded on the surface and the interior of the base material to realize the three-dimensional structure; in the electrode, the modification amount of the antimony doped tin oxide catalyst is 15-250 mg / cm<2>. The doping ratio of Sb in the antimony doped tin oxide catalyst is Sb / Sn = 5-20%. The final catalyst modification amount can reach 15-250 mg / cm<2>, and the problem of low modification amount of a traditional electrode ATO catalyst can be overcome. The electrode has a high oxygen evolution potential, which is favorable for inhibiting oxygen evolution side reactions in the degradation process and improving energy utilization efficiency. Comparewith a commercial electrocatalytic electrode, the high-efficiency long-life antimony doped tin oxide electrode shows excellent electrocatalytic oxidation performance. The accelerated test life of theelectrode is 26 times longer than the of a traditional ATO electrode.

Description

technical field [0001] The invention relates to the field of electrochemical oxidation electrode materials, in particular to a three-dimensional antimony-doped tin oxide electrode with high degradation ability and long service life. The electrode material is mainly used in electrochemical advanced oxidation technology to treat refractory organic wastewater, and belongs to the field of material preparation. Background technique [0002] The organic wastewater produced by human industrial production activities and the wastewater treated by traditional biological methods often contain high or low concentrations of refractory organic pollutants. These pollutants have a stable structure, high toxicity, and great harm. Traditional biochemical methods are difficult to treat. . [0003] Electrochemical oxidation technology is based on the electrocatalytic reaction on the electrode surface to generate strong oxidizing hydroxyl radicals, and has been widely studied and applied to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/30
CPCC02F1/46109C02F1/4672C02F2001/46142C02F2101/30C02F2209/44
Inventor 成少安孙怡
Owner ZHEJIANG UNIV
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