Carbon material adopting Zr-MOFs composite material as template, preparation method and application of carbon material
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A technology of composite materials and carbon materials, applied in the field of carbon materials based on Zr-MOFs composite materials as templates and its preparation, can solve the problems of poor stability MOFs, etc., and achieve channel adjustability, template selectivity diversification, high ratio The effect of capacitance
Inactive Publication Date: 2017-06-30
GUILIN UNIV OF ELECTRONIC TECH
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However, due to the poor stability of MOFs, there are great limitations in practical use and development.
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Embodiment 1
[0030] The specific operation steps of the carbon material preparation method based on the Zr-MOFs composite material as the template of the present invention are as follows:
[0031] Step (1), take the mass as (1.0mmol) ZrCl 4 and aminoterephthalic acid (H 2 BDC, 1.0mmol) Use 20 mL of DMF solvent to ultrasonically prepare the mixed solution of the two, take carboxylated graphene with a mass of 0.5% of the above mixture, and use 15 mL of N,N-dimethylformamide (DMF) solvent to ultrasonically prepare Graphene solution, and then ultrasonically mix all the prepared solutions;
[0032] Step (2), transfer all prepared solutions into a stainless steel reaction kettle, place the reaction kettle in an oven with temperature control at 120°C in advance for reaction, and keep it warm for 48 hours. The obtained precipitate is centrifugally washed with DMF, filtered, and then Dry at 120°C to obtain the sample;
[0033] Step (3), put the obtained sample into the tube furnace, under N 2 C...
Embodiment 2
[0038] The steps not particularly described are the same as those in Example 1, except that in step (3), the heating carbonization treatment temperature is 900°C.
[0039] The test condition for the low-temperature nitrogen isothermal adsorption performance of the carbon material of the present invention is degassing at 200° C. for 8 hours, and then performing nitrogen isothermal adsorption and desorption test at 77 K. The result is as Figure 4Shown, embodiment 2 gained material specific surface area reaches 1315 m 2 g -1 .
[0040] The application of the carbon material of the present invention as an electrode material of a supercapacitor, its electrochemical performance test is carried out on an electrochemical workstation. Including cyclic voltammetry curve, test results such as Figure 5 As shown, at different scan rates, the cyclic voltammetry curves maintain a good rectangular shape, indicating good electric double layer capacitive behavior and electrochemical rever...
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Abstract
The invention provides a carbon material adopting a Zr-MOFs composite material as a template. Aminoterephthalic acid, ZrCl4 and carboxylated graphene are subjected to hydrothermal synthesis, and an obtained product is subjected to heating and carbonization treatment, so that the carbon material can be obtained; and the specific surface area of the carbon material ranges from 1000 to 1973 m<2>g<-1>. A preparation method of the carbon material includes the following steps that: (1) mixing and ultrasonic treatment is performed on aminoterephthalic acid, ZrCl4 and carboxylated graphene; (2) an obtained mixture is subjected to hydrothermal synthesis, so that a composite material UiO-66-NH2 / carboxylated graphene composite material can be synthesized; (3) the composite material is subjected to heating and carbonization treatment, so that a product can be obtained; and (4) the product is washed and dried, so that the porous carbon material can be obtained. As indicated by an electrochemical performance test performed on the carbon material, when the carbon material is used as a supercapacitor electrode material, the current density of the carbon material is 0.15Ag<-1>, the specific capacitance value of the carbon material ranges from 150 to 300Fg<-1>, and therefore, the carbon material of the present invention has a wide application prospect in the fields of carbon materials, particularly supercapacitors.
Description
technical field [0001] The invention relates to the technical field of carbon materials, in particular to a carbon material based on a Zr-MOFs composite material as a template, a preparation method and application thereof. Background technique [0002] Supercapacitor, also known as electric double layer capacitor, is a new type of energy storage device. It has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. Materials used for capacitors include porous carbon bases, graphene, conductive polymers, and transition metal oxides such as ruthenium, iridium, manganese, nickel, and vanadium. Porous carbon materials, characterized by low density, high surface area, large pore volume, and high thermal and chemical stability, are one of the most attractive and important materials because of their usefulness in many important technical fields. A wide range of applications, such as applications ...
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