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a ti/comoo 4 Preparation method of nano-array electrode

A nano-array and electrode technology, which is applied in the field of electrochemical water pollution control, can solve the problems of short service life of electrodes, complicated preparation process, easy diffusion of oxygen atoms, etc., and achieve stable electrode performance, simple preparation process and firm combination

Active Publication Date: 2022-03-08
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among the preparation methods of titanium-based stable electrodes, gel-sol-high-temperature sintering is the most commonly used method for loading metal oxides on Ti substrates. This process requires repeated coating-drying-calcining, and the preparation process is complicated. Oxygen atoms easily diffuse to the titanium substrate during use, resulting in the formation of a non-conductive film between the metal oxide and the Ti substrate, and cracking and falling off of the oxide, resulting in a short service life of this type of electrode

Method used

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  • a ti/comoo <sub>4</sub> Preparation method of nano-array electrode
  • a ti/comoo <sub>4</sub> Preparation method of nano-array electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Embodiment 1: prepare Ti / CoMoO with the method provided by the present invention 4 nanoarray electrodes

[0053] S1. Pretreatment of the porous titanium substrate: use sandpaper to polish the surface of the porous titanium substrate (5cm×5mm×1mm, with a pore size of 10 μm), put it into acetone and ultrasonically soak it to remove oil; then put it into 10% oxalic acid solution Heat and soak for 10 minutes to remove the oxide film on the surface; ultrasonically clean with ultrapure water and ethanol and dry for later use.

[0054] Preparation of S2, Ti / Co(OH)F: Co(NO 3 ) 2 .6H 2 O, NH4F, glucose, and hydrazine were dissolved in water at a molar ratio of 1:2.5:5:5, and stirred evenly; the mixed solution was transferred to a reaction kettle, and S1 pretreated porous titanium was stirred with a magnetic stirrer for 20 minutes and then transferred to Put it into an oven at 170°C, and react for 5 hours; after cooling, take out the titanium sheet, wash it with water, and dr...

Embodiment 2

[0056] Embodiment 2: use Ti / CoMoO provided by the present invention 4 Nanoarray electrodes degrade printing and dyeing wastewater containing rhodamine B.

[0057] Ti / CoMoO prepared under the conditions of Example 1 of the present invention 4 The nanoarray electrode is used as the cathode, the Pt sheet is used as the anode, and 0.1M Na 2 SO 4 As a supporting electrolyte, the constant current mode is used, and the current density is 10mA / em 2 , the distance between the plates is 10mm, and the simulation of degrading rhodamine B containing 10mg / L can remove 98.7% of rhodamine B in 40 minutes, and the effect is shown in Table 1.

[0058] Table 1

[0059] time / min 0 10 20 40 Removal rate 0 56.3 82.5 98.7％

[0060] Compared with prior art, the beneficial effect of this method is:

[0061] 1. Compared with the traditional single metal oxide, the combination of Ti substrate and binary metal oxide greatly improves its electrical conductivity and electro...

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Abstract

The present invention relates to a kind of Ti / CoMoO 4 A method for preparing a nano-array electrode, the method comprising: S1, pretreating a porous titanium substrate; S2, preparation of Ti / Co(OH)F: divalent cobalt salt, soluble fluoride, small molecule template , Hydrazine was dissolved in water with a molar ratio of 1:2.0~3.5:4~8:5~10, and stirred evenly; the mixed solution was transferred to a reaction kettle, and S1 pretreated porous titanium was stirred with a magnetic stirrer for 20min. Transfer to an oven at a fixed temperature T1, and react for 3 to 7 hours; after cooling, take out the titanium sheet, wash it with water, and dry it in vacuum for 2 hours. S3, Ti / CoMoO 4 Preparation of nanoarrays: Weigh a certain amount of Na 2 MoO 4 2H 2 O dissolved in water, the Ti / Co(OH)F prepared by S2 was mixed with Na 2 MoO 4 The solution was transferred to the reaction kettle together, stirred with a magnetic stirrer for 10 minutes, sealed and placed in a drying oven, and reacted at a certain temperature T2 for a certain period of time; after cooling down to room temperature, the porous titanium was taken out and vacuum-dried for 2 hours to obtain Ti / CoMoO 4 Nanoarray electrodes.

Description

technical field [0001] The invention belongs to the field of electrochemical water pollution control and relates to a method for preparing Ti / CoMoO 4 Preparation of nano-array electrode and method for removing organic pollutants in water. Background technique [0002] At present, electrochemical methods have been widely used in the treatment of organic wastewater. The reaction conditions are mild, easy to control, and low energy consumption. It is a research hotspot in the field of environmental technology. The performance of electrode materials is a key factor affecting the efficiency of electrochemical water treatment. Commonly used electrodes include platinum electrodes, boron-doped diamond electrodes (BDD), titanium-based oxide electrodes (Ti / Sn-SbO2, Ti / PbO2, Ti / MnO2 ) Wait. Although platinum electrodes and diamond electrodes have good oxidation performance and long service life, their production costs are high. Therefore, low-cost titanium-based oxide shape-stable el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F101/30
CPCC02F1/46109C02F2101/30C02F2001/46142
Inventor 张云飞牛军峰
Owner DONGGUAN UNIV OF TECH
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