Method for preparing Ti/SnO2-Sb (titanium/tin dioxide-antimony) electrode by tricarboxylic organic acid-Sn(II)/Sb(III) complex

A sno2-sb, organic acid technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of poor coverage of prepared electrodes, uneven modification layer, hydrogen evolution side reaction, etc. , to achieve the effect of suppressing the hydrogen evolution side reaction, depositing a complete coating, and good coverage

Active Publication Date: 2018-12-21
ZHEJIANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional aqueous solution deposition system has poor solubility, and the prepared electrode often has poor coverage and uneven modification layer; on the other hand, the traditional deposition process mainly uses tetravalent tin as the tin source, because tetravalent tin has a higher deposition potential, The deposition process often requires a higher voltage, which leads to problems such as high energy consumption and side reactions of hydrogen evolution; in addition, the traditional aqueous solution deposition process often has poor bonding force between the modified layer and the titanium substrate, resulting in short electrode life

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  • Method for preparing Ti/SnO2-Sb (titanium/tin dioxide-antimony) electrode by tricarboxylic organic acid-Sn(II)/Sb(III) complex
  • Method for preparing Ti/SnO2-Sb (titanium/tin dioxide-antimony) electrode by tricarboxylic organic acid-Sn(II)/Sb(III) complex
  • Method for preparing Ti/SnO2-Sb (titanium/tin dioxide-antimony) electrode by tricarboxylic organic acid-Sn(II)/Sb(III) complex

Examples

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specific Embodiment 1

[0034] Use SnCl 2 Preparation of ATO electrode by electrodeposition using citric acid as a complexing agent as tin source

[0035] The specific steps of ATO electrode production are as follows: First, take a 20×20×0.65mm Ti sheet (purity 99.9%) and polish it with 400-mesh and 800-mesh sandpaper in turn, then spot weld and connect titanium wire as a conductor; wash with deionized water After cleaning, soak in NaOH solution with a mass concentration of 40wt% at 80°C for 0.5h. After soaking, wash and boil in an oxalic acid solution with a mass concentration of 10wt%. Reserve in ethanol solution.

[0036] The configuration method of the electrodeposition solution is: weigh 5.4g SnCl 2 2H 2 O, 0.18g SbCl 3 and 4.6g of citric acid were dissolved in 80mL of deionized water to form a transparent solution; after the solution was heated to 50°C in a water bath, 0.024g of gelatin was added and stirred until completely dissolved, then cooled to room temperature. In the electrodeposit...

specific Embodiment 2

[0041] This example compares the performance of the electrode prepared by the method of the present invention and the ATO electrode prepared by the electrodeposition method reported in the literature in the treatment of methylene blue simulated wastewater. In this embodiment, the electrode preparation steps of the present invention are the same as those in the specific example 1.

[0042] The specific steps for preparing the ATO electrode using the electrodeposition method reported in the literature are: the pretreatment method of the Ti sheet is the same as in Example 1; the configuration of the electrodeposition solution is to weigh 2.6g SnCl 4 ·5H 2 O; 0.164 g SbCl 3 and 1.2g of tartaric acid were dissolved in 80ml of deionized water; the pretreated Ti sheet was vertically immersed in the prepared electrodeposition solution, and two smooth graphite sheets with a diameter of 3.5cm and a thickness of 1mm were symmetrically placed on the Ti sheet On both sides, the distance ...

specific Embodiment 3

[0044] The electrode prepared by the method of the present invention is compared with a commercially purchased boron-doped diamond film (BDD) electrode for degrading methylene blue simulated wastewater.

[0045] In this embodiment, the electrode preparation steps of the present invention are the same as those in Embodiment 1; the BDD electrode is purchased from Neocoat, Switzerland, the electrode size is 20mm×20mm×1mm, the specification is that the diamond film thickness is 5 μm, the boron doping concentration is 2500ppm, and the base material is Nb , double-sided modification. The specific steps of the methylene blue simulated wastewater degradation are the same as in the specific implementation 2. Using different anode materials, the degradation curve of methylene blue is as follows Figure 5 As shown, the first-order degradation kinetics fitting is carried out to the degradation results of each electrode, and the first-order degradation kinetic rate constants of the specif...

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Abstract

The invention relates to a preparation technology of an electrochemical oxidation electrode material, and aims at providing a method for preparing a Ti/SnO2-Sb (titanium/tin dioxide-antimony) electrode by a tricarboxylic organic acid-Sn(II)/Sb(III) complex. The method comprises the following steps of using the pretreated Ti sheet as a working electrode, arranging counter electrodes at both sides in parallel, and respectively soaking the working electrode and the counter electrodes into an electrodeposition solution, wherein the electrodeposition solution is a mixed water solution of stannous dichloride, antimony trichloride, tricarboxylic organic acid and gelatin; connecting a positive pole of a direct current power source and the counter electrodes, and connecting a negative pole and theworking electrode; after the electrodeposition is completed, drying the working electrode at room temperature without cleaning; after drying, warming for 1 to 3h at the temperature of 450 to 650 DEG C, and cooling to room temperature, so as to obtain the electrode product. The preparation technology has the advantages that the operation is simple, the environment-friendly effect is realized, and the cost is low; the electrode surface is uniform and complete, and the covering degree is good; the antimony-doped tin dioxide is uniformly and densely distributed at the electrode surface, the specific surface area is high, and more active sites are provided in the electrochemical oxidation process; the service life of accelerated test of the electrode product is long, and the stability is good.

Description

technical field [0001] The invention relates to the preparation technology of electrochemical oxidation electrode materials, in particular to the preparation of Ti / SnO based on tricarboxylic organic acid-Sn(II) / Sb(III) complexes 2 - Method of Sb electrode. The electrode material is mainly used in electrochemical advanced oxidation technology to treat refractory organic wastewater, and belongs to the technical field of material preparation and water treatment. Background technique [0002] With the development of industrial processes, the environmental pressure caused by industrial sewage discharge is becoming increasingly severe. These sewage often contain a large number of refractory organic pollutants composed of benzene rings, heterocycles, aromatic hydrocarbons and other structures. These pollutants have stable structures and high toxicity. Once discharged into the environment, they will cause long-term damage to the ecological environment and human health. However, tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/30
CPCC02F1/46109C02F1/4672C02F2101/30
Inventor 成少安孙怡岑可法
Owner ZHEJIANG UNIV
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