Nickel manganese double-metal hydroxide composite material, photocatalyst and electrode material

A technology of hydroxide and composite materials, which is applied in the direction of physical/chemical process catalysts, hybrid capacitor electrodes, battery electrodes, etc., can solve the problems of capacity fading and limited development, and achieve good electrochemical cycle stability, stable structure, and electrochemical The effect of superior performance

Active Publication Date: 2017-06-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the capacity fading caused by the swelling and collapse of the structure of nickel-manganese double hydroxide nanosheets during the cycle limits its furth

Method used

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  • Nickel manganese double-metal hydroxide composite material, photocatalyst and electrode material
  • Nickel manganese double-metal hydroxide composite material, photocatalyst and electrode material
  • Nickel manganese double-metal hydroxide composite material, photocatalyst and electrode material

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preparation example Construction

[0047] The present invention provides the preparation method of the nickel-manganese double metal hydroxide composite material described in the above technical scheme, comprising:

[0048] Dissolving bismuth oxycarbonate and alkaline substances in water to obtain a dispersion;

[0049] The dispersion liquid, the nickel salt and the manganese salt are reacted to obtain the nickel-manganese double metal hydroxide composite material.

[0050] In the present invention, preferably, bismuth oxycarbonate and a basic substance are dissolved in water and stirred to obtain a dispersion. In the present invention, the stirring is preferably magnetic stirring. In the present invention, the magnetic stirring time is preferably 8-12 minutes, more preferably 10 minutes.

[0051] In the present invention, the bismuth oxycarbonate is preferably bismuth oxycarbonate nanoflowers. The present invention has no special limitation on the source of the bismuth oxycarbonate nanoflowers, which can be p...

Embodiment 1

[0062] The preparation of embodiment 1 bismuth oxycarbonate nanoflower

[0063] Dissolve 1.66g of ammonium bismuth citrate and 0.72g of urea in 75mL of water, pour it into a 100mL high-pressure polytetrafluoroethylene reactor and stir it magnetically for 30min, react the obtained precursor at 180°C for 12h, and prepare the obtained The product is washed and dried in water and alcohol respectively to obtain the desired (BiO) 2 CO 3 nanoflowers.

[0064] The bismuth oxycarbonate nanoflowers prepared in Example 1 of the present invention are detected by SEM, and the detection results are as follows: figure 1 as shown, figure 1 For the SEM detection figure of the bismuth oxycarbonate nanoflowers prepared in Example 1 of the present invention, by figure 1 It can be seen that the bismuth oxycarbonate nanoflowers prepared in Example 1 of the present invention are regular cluster nanoflowers with stable structure and uniform size.

Embodiment 2

[0065] The preparation of embodiment 2 bismuth oxycarbonate-nickel manganese double hydroxide composite material

[0066] Disperse 50 mg of the bismuth oxycarbonate nanoflowers prepared in Example 1 in 50 mL of aqueous solution, add 300 mg of urea to adjust the alkalinity, and stir for 10 minutes with a magnetic stirrer. Then, 270 mg of nickel nitrate and 0.35 mL of manganese nitrate were added to carry out heating reaction in a water bath, the reaction temperature was 85° C., and the reaction time was 6 hours. The obtained product was washed with water and ethanol and then dried at 60° C. to obtain a bismuth oxycarbonate-nickel manganese double hydroxide composite material.

[0067] The bismuth oxycarbonate-nickel-manganese double hydroxide composite material prepared in Example 2 of the present invention is detected by SEM, and the detection results are as follows: figure 2 and image 3 as shown, figure 2 and image 3 The SEM figure of the bismuth oxycarbonate-nickel m...

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Abstract

The invention provides a nickel manganese double-metal hydroxide composite material. The nickel manganese double-metal hydroxide composite material comprises bismuth subcarbonate and nickel manganese double-metal hydroxide loaded on the surface of bismuth subcarbonate. Compared with the prior art, the nickel manganese double-metal hydroxide composite material adopts bismuth subcarbonate as a carrier, the surface of bismuth subcarbonate is loaded with nickel manganese double-metal hydroxide, and bismuth subcarbonate is adopted as a substrate for nickel manganese double-metal hydroxide to grow, and can guide and control the shape and structure of nickel manganese double-metal hydroxide; moreover, tight connection of bismuth subcarbonate and nickel manganese double-metal hydroxide can more fully and more quickly provide an ion channel for an redox reaction; under the joint action of bismuth subcarbonate and nickel manganese double-metal hydroxide, the obtained composite material can simultaneously have good electrochemical performance and photocatalytic performance. The invention further provides an electrode material and a photocatalyst.

Description

technical field [0001] The invention relates to the technical field of nickel-manganese double metal hydroxides, in particular to a nickel-manganese double metal hydroxide, a photocatalyst and an electrode material. Background technique [0002] Layered Double Hydroxide (LDHs) is also called anionic clay or hydrotalcite-like compound, and its crystal structure is similar to that of Hydrotalcite (Mg, molecular formula) existing in nature. 6 al 2 (OH) 16 CO 3 4H 2 O) The structures are similar. Layered double hydroxide has been studied for a long time since its discovery, and it has a wide range of applications in catalytic chemistry, ion exchangers, adsorbents, electrochemistry, and photochemistry. Layered double hydroxide is rich in sheets and can be used as an electrode material for supercapacitors. It can simultaneously utilize two energy storage mechanisms of electric double layer capacitance and Faraday quasi-capacitance. On the one hand, it improves the electric d...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01M4/90B01J27/232
CPCB01J27/232B01J35/004H01G11/30H01M4/9016Y02E60/50
Inventor 张育新单乾元刘晓英郭小龙董帆
Owner CHONGQING UNIV
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