Preparation method of humic acid layer sheet-based bimetal MoFs composite powder

A composite powder and bimetallic technology, which is applied in the cross field of energy storage materials and synthetic chemistry, can solve the problems of serious environmental pollution, application limitations, cumbersome synthesis process, etc., and achieve good rate characteristics, good cycle stability, and high ratio The effect of capacitance

Active Publication Date: 2019-06-11
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, graphene is commonly prepared by the Hummers chemical oxidation method, which has the proble

Method used

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  • Preparation method of humic acid layer sheet-based bimetal MoFs composite powder
  • Preparation method of humic acid layer sheet-based bimetal MoFs composite powder
  • Preparation method of humic acid layer sheet-based bimetal MoFs composite powder

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Embodiment 1

[0034] The preparation method of the humic acid-layer sheet-based bimetallic MOFs composite powder in this embodiment specifically includes the following steps:

[0035] Step 1. Dissolve 22mg of sodium humate in 20mL of deionized water, filter with qualitative filter paper to remove large particles, and obtain suspension A;

[0036] Step 2. Add 43.5 mg of nickel nitrate hexahydrate and 43.5 mg of cobalt nitrate hexahydrate into 10 mL of deionized water, and stir evenly to obtain solution B;

[0037] Step 3. Mix the suspension A in the above step 1 with the solution B in the step 2, first ultrasonically treat it for 40 minutes, then conduct a hydrothermal reaction at 190°C for 12h, and cool the material after the hydrothermal reaction to room temperature (25°C) After ultrasonic treatment for 20min, suspension C was obtained; the frequency of ultrasonic treatment was 60KHz, and the power was 180W;

[0038]Step 4. Disperse 24 mg of 4,4'-biphenyl dicarboxylic acid in 30 mL of dei...

Embodiment 2

[0043] The preparation method of the humic acid-layer sheet-based bimetallic MOFs composite powder in this embodiment specifically includes the following steps:

[0044] Step 1. Dissolve 22mg of sodium humate in 22mL of deionized water, filter with qualitative filter paper to remove large particles, and obtain suspension A;

[0045] Step 2. Add 48.4 mg of nickel nitrate hexahydrate and 24.2 mg of cobalt nitrate hexahydrate into 10 mL of deionized water, and stir evenly to obtain solution B;

[0046] Step 3. Mix the suspension A in the above step 1 with the solution B in the step 2, first ultrasonically treat it for 45 minutes, then conduct a hydrothermal reaction at 150°C for 11 hours, and cool the material after the hydrothermal reaction to room temperature (25°C) After ultrasonic treatment for 25min, suspension C was obtained; the frequency of ultrasonic treatment was 50KHz, and the power was 200W;

[0047] Step 4. Disperse 18 mg of 4,4'-biphenyl dicarboxylic acid in 30 mL ...

Embodiment 3

[0052] The preparation method of the humic acid-layer sheet-based bimetallic MOFs composite powder in this embodiment specifically includes the following steps:

[0053] Step 1. Dissolve 22mg of sodium humate in 26mL of deionized water, filter with qualitative filter paper to remove large particles, and obtain suspension A;

[0054] Step 2. Add 19.3 mg of nickel nitrate hexahydrate and 38.7 mg of cobalt nitrate hexahydrate into 10 mL of deionized water, and stir evenly to obtain solution B;

[0055] Step 3. Mix the suspension A in the above step 1 with the solution B in the step 2, first ultrasonically treat it for 35 minutes, then conduct a hydrothermal reaction at 170°C for 10 hours, and cool the material after the hydrothermal reaction to room temperature (25°C) After ultrasonic treatment for 15 minutes, suspension C was obtained; the frequency of ultrasonic treatment was 40KHz, and the power was 150W;

[0056] Step 4. Disperse 12 mg of 4,4'-biphenyl dicarboxylic acid in 3...

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Abstract

The invention discloses a preparation method of humic acid layer sheet-based bimetal MoFs composite powder; the method comprises the following steps of 1, dissolving sodium humate in deionized water,and carrying out filtering to obtain a suspension liquid A; 2, adding nickel nitrate hexahydrate and cobalt nitrate hexahydrate into deionized water to obtain a solution B; 3, mixing the suspension liquid A with the solution B, carrying out ultrasonic treatment, then carrying out hydro-thermal reaction, and carrying out ultrasonic treatment to obtain a suspension liquid C; 4, enabling 4, 4'-biphenyldicarboxylic acid into deionized water, and dropwise adding a sodium hydroxide water solution to obtain a solution D; 5, dropwise adding the solution D into the suspension liquid C, and carrying outhydrothermal reaction; and 6, cooling the product to room temperature, carrying out centrifugally separating and drying to obtain the humic acid layer sheet-based bimetal MoFs composite powder. According to the humic acid layer sheet-based bimetal MoFs composite powder prepared by the preparation method, MoFs grows on the humic acid layer sheet in a two-dimensional nanosheet form, and when the composite powder is used as an electrode material, the composite powder has high specific capacitance, high rate characteristic and relatively high cycling stability.

Description

technical field [0001] The invention belongs to the intersecting technical field of energy storage materials and synthetic chemistry, and in particular relates to a method for preparing a humic acid layer-based bimetallic MOFs composite powder. Background technique [0002] Metal-organic frameworks (Metal-Organic Frameworks, MOFs) are network-like crystalline framework structures formed by transition metal ions and oxygen- or nitrogen-containing organic ligands connected by coordination bonds. MOFs have the characteristics of large specific surface, adjustable pores, and diverse structures, and have potential applications in the fields of catalysis, optics, gas adsorption, and energy storage. MOFs have good electrochemical activity, and more active sites can be obtained by controlling the structure and porosity of metal-organic framework materials. Therefore, MOFs not only have the characteristics of porous carbon materials and large specific surface, which can play the rol...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/86
Inventor 汪晓芹杨娜娜贺凡李巧琴从少领李侃社熊善新周安宁牛红梅刘静陈创前康洁朱雪丹李锦章结兵
Owner XIAN UNIV OF SCI & TECH
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