A cu@cumoo 4 /ti Fabrication of multi-element hierarchical nanorod electrodes

A nanorod and electrode technology, which is applied in the field of preparing Cu@CuMoO4/Ti nanorod electrodes, can solve the problems of short electrode service life, complicated preparation process, easy diffusion of oxygen atoms, etc., and achieve stable electrode performance and simple preparation process. , combined with a strong effect

Active Publication Date: 2022-03-01
DONGGUAN UNIV OF TECH
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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 cu@cumoo <sub>4</sub> /ti Fabrication of multi-element hierarchical nanorod electrodes
  • A cu@cumoo <sub>4</sub> /ti Fabrication of multi-element hierarchical nanorod electrodes

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preparation example Construction

[0035] The preparation method of multi-component hierarchical Cu@CuMoO4 / Ti nanorod electrode provided by the present invention comprises the following steps:

[0036] In the present invention, S1 is a pretreatment step for the porous titanium substrate: use sandpaper to polish the surface of the porous titanium substrate, put it in acetone and ultrasonically soak it to remove oil; then put it into 10% oxalic acid solution and heat it for 10 minutes to remove Oxide film on the surface; ultrasonic cleaning with ultrapure water and ethanol, drying, and standby; wherein, the porous titanium substrate has a pore diameter of 0.5-20 μm, which can be titanium plate, titanium mesh or titanium tube.

[0037] In the present invention, S2 is the preparation step of Cu@Cu(OH)F / Ti: that is, divalent copper salt, soluble fluoride, small molecule template agent, and hydrazine are mixed in a ratio of 1:2.0~3.5:4~8:5 Dissolve in water at a molar ratio of ~10, and stir evenly; transfer the mixed...

Embodiment 1

[0043] Example 1 Preparation of Cu@CuMoO by the method provided by the present invention 4 / Ti nanorod electrode

[0044] 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.

[0045] S2. Preparation of Cu@Cu(OH)F / Ti: Cu(NO 3 )2.6H 2 O, NH 4 F, glucose, hydrazine are dissolved in water with the molar ratio of 1: 2.5: 5: 5, stir evenly; The mixed solution is transferred in the reactor, and the porous titanium of S1 pretreatment is transferred to 170 after stirring with a magnetic stirrer for 20min. In an oven at ℃, react for 5 hours; after cooling, take out the titanium sheet, wash it with water, and dry it in vacuum for...

Embodiment 2

[0047] Embodiment 2: Cu@CuMoO provided by the present invention 4 / Ti nanorod electrode degrades printing and dyeing wastewater containing rhodamine B.

[0048] Cu@CuMoO prepared under the conditions of Example 1 of the present invention 4 / Ti nanorod electrode as cathode, Pt sheet as anode, add 0.1M Na 2 SO 4 As a supporting electrolyte, the constant current mode is used, and the current density is 10mA / cm 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 40min, and the effect is shown in Table 2.

[0049] time / min 0 10 20 40 Removal rate 0 56.3 82.5 98.7％

[0050] Compared with the prior art, the present invention has the following inventive effects:

[0051] 1. Compared with the traditional single metal oxide, the combination of Ti substrate and binary metal oxide greatly improves the conductivity and electrochemical activity. Cu@CuMoO loaded on the ti...

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Abstract

The invention relates to a multi-component graded Cu@CuMoO 4 / Ti nanorod electrode preparation method, comprises the following steps: S1, the porous titanium substrate is carried out pretreatment; S2, the preparation of Cu@Cu(OH)F / Ti: divalent copper salt, soluble fluoride, small The molecular template agent and hydrazine are dissolved in water at a molar ratio of 1:2.0~3.5:4~8:5~10, and stirred evenly; the mixed solution is transferred to the reaction kettle, and the porous titanium pretreated by S1 is mixed with a magnetic stirrer After stirring for 20 minutes, transfer it to an oven at a certain temperature T1, and react for 3-7 hours; after cooling, take out the titanium sheet, wash it with water, and dry it in vacuum for 2 hours; S3, Cu@CuMoO 4 / Ti nanorod preparation: Weigh a certain amount of Na 2 MoO 4 2H 2 O dissolved in water, Cu@Cu(OH)F / Ti prepared by S2 and 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 dry box, 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 Cu@CuMoO 4 / Ti nanorod electrodes.

Description

technical field [0001] The invention belongs to the field of electrochemical water pollution control and relates to a method for preparing Cu@CuMoO 4 Preparation of / Ti nanorod 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-SbO 2 、Ti / PbO 2 , Ti / MnO 2 ) 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-st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F101/38
CPCC02F1/46104C02F2001/46133C02F2101/308C02F2101/38
Inventor 张云飞牛军峰
Owner DONGGUAN UNIV OF TECH
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