Method for preparing graphene oxide according to Fenton oxidation method
A Fenton oxidation and graphite technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of environmental pollution, non-recyclability, hindering the mass production of graphene oxide, etc., without special protection, change Expensive, changing the effect of difficult separation and purification
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Embodiment 1
[0029] Expanded graphite was prepared by 98wt% concentrated sulfuric acid and 30wt% hydrogen peroxide oxidative intercalation. In this example, 0.3g of natural flake graphite with a size of 180 μm and a carbon content of 90% was added to 10 mL H 2 SO 4 , 2 mL H 2 o 2 After stirring for 30 min and then standing at room temperature for 8 h, the flake graphite undergoes natural and gentle intercalation expansion, and the expansion volume is 30 mL. The pre-expanded graphite is vacuum filtered to collect the waste liquid for repeated use. Add 3mL of 1mol / L Fenton’s reagent and 9mL of 10% hydrogen peroxide to 0.3g of the pre-expanded graphite product. At this time, because the pre-expanded graphite has not been treated and the liquid environment is acidic, the graphite oxide product is obtained by hydrothermal reaction at 180°C for 6 hours, and then used Wash with deionized water repeatedly until the pH of the water phase is 7, then add 300mL of deionized water for 800W ultrasoni...
Embodiment 2
[0031] Adopt the method of the concentrated sulfuric acid of 98wt%, the hydrogen peroxide oxidative intercalation of 30wt% to prepare expanded graphite, in this embodiment, at first 3 g size is 23 μm carbon content and is 95% natural flake graphite and is added to 25 mL H 2 SO 4 , 2.5 mL H 2 o 2 After stirring for 10 min and then standing at room temperature for 4 h, the flake graphite undergoes natural and gentle intercalation expansion, and the expansion volume is 50 mL. The pre-expanded graphite is vacuum filtered, and the collected waste liquid is reused. Add 3mL of 3mol / L Fenton's reagent and 15mL of 30% hydrogen peroxide to 0.3g of the pre-expanded graphite product. At this time, because the pre-expanded graphite has not been treated and the liquid environment is acidic, the graphite oxide product is obtained by hydrothermal reaction at 100°C for 8 hours, and then used Repeated washing with deionized water until the pH of the water phase = 7, and then adding 800W ultr...
Embodiment 3
[0033] Adopt 98wt% concentrated sulfuric acid, the method for oxidative intercalation of 30wt% hydrogen peroxide to prepare expanded graphite, in the present embodiment, at first 20 g size is 270 μm and carbon content is 99% natural flake graphite is added to 50 mL H 2 SO 4 , 8 mL H 2 o 2After stirring for 20 min and then standing at room temperature for 3 h, the flake graphite undergoes natural and gentle intercalation expansion, and the expansion volume is 240 mL. The pre-expanded graphite is vacuum filtered, and the collected waste liquid is reused. Add 3mL of 2mol / L Fenton’s reagent and 24mL of 20% hydrogen peroxide to 0.3g of the pre-expanded graphite product. At this time, because the pre-expanded graphite has not been treated and the liquid environment is acidic, the graphite oxide product is obtained by hydrothermal reaction at 160°C for 10 hours, and then used Wash with deionized water repeatedly until the pH of the water phase is 7, then add 300mL of ethanol and w...
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