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Preparation method of metal/covalent organic framework compound and titanium aluminum carbide combined oxygen reduction catalyst

A technology of covalent organic framework and metal organic framework, which is applied in the field of preparation of oxygen reduction catalysts, can solve the problems of weak catalytic performance, weak conductivity and poor stability of composite materials, and achieve improved redox performance, strong power generation performance, and operation simple effect

Active Publication Date: 2022-05-06
QUFU NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there are few related studies, and the synthesized composite materials also have some problems such as weak catalytic performance, poor stability, and weak electrical conductivity.

Method used

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  • Preparation method of metal/covalent organic framework compound and titanium aluminum carbide combined oxygen reduction catalyst
  • Preparation method of metal/covalent organic framework compound and titanium aluminum carbide combined oxygen reduction catalyst
  • Preparation method of metal/covalent organic framework compound and titanium aluminum carbide combined oxygen reduction catalyst

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preparation example Construction

[0024] see figure 1 , figure 1 It is a schematic flow chart of the preparation method of the metal / covalent organic framework compound combined with titanium aluminum carbide oxygen reduction catalyst of the present invention. Such as figure 1 As shown, the present invention provides a method for preparing an oxygen reduction catalyst of a metal / covalent organic framework compound combined with titanium aluminum carbide, comprising the following steps:

[0025] Step 1: Add 2g of lithium fluoride to 20mL 9 mol L -1 In a beaker of HCl, ultrasonic 10min to form a transparent etching solution; 2g Ti 3 AlC 2 Slowly add to the etching solution, then react for 24 h under constant temperature magnetic stirring at 40 °C, and then centrifuge and wash with distilled water several times, each time for 10 min, at a speed of 3500 r min -1 , until the pH of the supernatant was 6, and vacuum-dried to obtain Ti 3 AlC 2 powder;

[0026] Step 2: 36.00 mg, 0.27 mmol of terephthalaldehyde...

Embodiment approach

[0036] see Figure 4 , the present invention uses COF-300, Ti 3 AlC 2 , ZIF-8@Ti 3 AlC 2 , COF-300@Ti 3 AlC 2 , COF-300 / ZIF-8, COF-300 / ZIF-8@Ti 3 AlC 2 As MFC cathode catalyst. Both CV and LSV assays were performed in 50 mM PBS solution.

[0037] By comparing the cyclic voltammetry curves, it can be seen that at the same scanning speed, the cyclic voltammetry integrated area of ​​the metal / covalent organic framework compound combined with titanium aluminum carbide is larger. The results show that the synthesized metal / covalent organic framework compound Co-titanium-aluminum carbide nanostructures have good redox properties. The composite metal / covalent organic framework compound combined with titanium aluminum carbide has a redox peak in PBS solution, which confirms its higher electrical activity and conductivity as well as more active centers and functional groups. The structure of metal / covalent organic framework compound combined titanium aluminum carbide electrod...

Embodiment 2

[0040] This implementation case shows the implementation of the oxygen reduction catalyst of metal / covalent organic framework compound combined with titanium aluminum carbide according to the following scheme:

[0041] see Figure 5 , in order to study the electrochemical performance of metal / covalent organic framework compound combined titanium aluminum carbide oxygen reduction catalyst, COF-300, Ti 3 AlC 2 , ZIF-8@Ti 3 AlC 2 , COF-300@Ti 3 AlC 2 , COF-300 / ZIF-8, COF-300 / ZIF-8@Ti 3 AlC 2 As MFC cathode catalyst. CV assays were performed in 50 mM PBS solution.

[0042] Figure 5 The CV curves of oxygen reduction catalysts of metal / covalent organic framework compound combined with titanium aluminum carbide at different scan rates are shown. The scan rate is 10---100mV / s, the potential range is -1.0---1.0v, although the scan rate is increased to 100mV / s, the CV curve still shows a similar shape, indicating that the electrode has rate performance and electrochemical rev...

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Abstract

The invention discloses a preparation method of a metal / covalent organic framework compound and titanium aluminum carbide combined oxygen reduction catalyst, which comprises the following steps: firstly, preparing a nanosheet substrate titanium aluminum carbide Ti3AlC2, then combining a three-dimensional material metal organic framework compound (ZIF-8) and a covalent organic framework compound (COF-300) through a mother liquor mixing method, and finally, preparing the metal / covalent organic framework compound and titanium aluminum carbide combined oxygen reduction catalyst. The COF-300 / ZIF-8 is successfully grown on the titanium aluminum carbide (Ti3AlC2) of the nanosheet substrate, and the COF-300 / ZIF-8 (at) Ti3AlC2 is successfully obtained. Meanwhile, the invention discloses application of the composite material as a microbial fuel cell cathode catalyst. The composite material COF-300 / ZIF-8-coated Ti3AlC2 prepared by the preparation method disclosed by the invention has high activity, durability and electricity generation stability, so that the performance of the microbial fuel cell is further improved.

Description

technical field [0001] The invention relates to the technical field of microbial fuel cell cathode modification, in particular to a method for preparing an oxygen reduction catalyst of a metal / covalent organic framework compound combined with titanium aluminum carbide. Background technique [0002] With the rapid development of industry and agriculture in our country and the improvement of people's living standards, the requirements for water quality are getting higher and higher. However, due to the influence of factors such as soil erosion and water source pollution, the composition of surface water gradually tends to be complex, with the increase of organic components and the difficulty of drinking water treatment. The conventional drinking water treatment process takes coagulation, sedimentation, filtration, disinfection, etc. as the main steps, and the main purpose is to remove turbidity and bacteria. agents, disinfection by-products, etc., and its removal effect is ex...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M8/16
CPCH01M4/8878H01M4/9008H01M8/16Y02E60/50
Inventor 陈峻峰杨佳琪刘彦彦王仁君杨月伟王雪梅杨道鑫吴轶群赵永越魏庆营王永乐
Owner QUFU NORMAL UNIV
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