A method for rapid preparation of graphene airgel by heteropolyacid catalysis
A graphene aerogel, heteropolyacid technology, applied in the direction of graphene, chemical instruments and methods, carbon compounds, etc., can solve the problems of not meeting the requirements of rapid large-scale production, not suitable for large-scale production, and unable to be practically applied. , to achieve the effect of high mechanical strength, mild process conditions and short time consumption
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Embodiment 1
[0045] (1) First, 0.05 g, 0.025 mmol of phosphomolybdic acid yellow crystals (McLean Biochemical Technology Co., Ltd.) were dissolved in 2 mL of deionized water to form a yellow clear solution, which was designated as solution A;
[0046] (2) Dissolve 0.027 g and 0.25 mmol of p-phenylenediamine powder (McLean Biochemical Technology Co., Ltd.) in 2 mL of deionized water to form a red clear solution, which is designated as solution B.
[0047](3) The two were evenly stirred and mixed to obtain a suspension, which was transferred to a 10 mL glass bottle after ultrasonication at 30 kW for 1 min.
[0048] (4) 3 mL of graphene oxide dispersion with a concentration of 5 mg / mL was injected into a glass vial with a pipette gun, and the graphene hydrogel was obtained after standing for 1 min.
[0049] (5) After the obtained graphene hydrogel is soaked in deionized water to remove unreacted substances, it is pre-frozen at -30°C, and then freeze-dried at -50°C and <10Pa pressure environme...
Embodiment 2
[0053] (1) First, 0.05 g, 0.025 mmol of phosphomolybdic acid crystals (McLean Biochemical Technology Co., Ltd.) were dissolved in 2 mL of deionized water to form a yellow clear solution, which was recorded as solution A;
[0054] (2) Dissolve 0.027 g and 0.25 mmol of 2,6-diaminopyridine powder (McLean Biochemical Technology Co., Ltd.) in 2 mL of deionized water to form a red clear solution, which is designated as solution B.
[0055] (3) The two were evenly stirred and mixed to obtain a suspension, which was transferred to a 10 mL glass bottle after 30 kW ultrasound for 1 min.
[0056] (4) 3 mL of graphene oxide dispersion with a concentration of 5 mg / mL was injected into a glass vial with a pipette gun, and the graphene hydrogel was obtained after standing for 1 min.
[0057] (5) After the obtained graphene hydrogel is soaked in deionized water to remove unreacted substances, it is pre-frozen at -30°C, and then freeze-dried at -50°C and image 3 As shown, a three-dimensional ...
Embodiment 3
[0060] (1) First, 0.05 g, 0.025 mmol of phosphomolybdic acid crystals (McLean Biochemical Technology Co., Ltd.) were dissolved in 2 mL of deionized water to form a yellow clear solution, which was recorded as solution A;
[0061] (2) Dissolve 0.036 g and 0.25 mmol of melamine powder (McLean Biochemical Technology Co., Ltd.) in 2 mL of deionized water to form a red clear solution, which is designated as solution B.
[0062] (3) The two were evenly stirred and mixed to obtain a suspension, which was transferred to a 10 mL glass bottle after ultrasonication at 30 kW for 1 min.
[0063] (4) 3 mL of graphene oxide dispersion with a concentration of 5 mg / mL was injected into a glass vial with a pipette gun, and the graphene hydrogel was obtained after standing for 1 min.
[0064] (5) After the obtained graphene hydrogel is soaked in deionized water to remove unreacted substances, it is pre-frozen at -30°C, and then freeze-dried at -50°C and Figure 5 As shown, a three-dimensional po...
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