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本發明係揭露一種石墨烯材料的製作方法，包含第一氧化步驟、第一加熱步驟、第二加熱步驟、第二氧化步驟、分離步驟、乾燥步骤、第一超音波震盪步驟、還原步驟、第二超音波震盪步驟、加熱攪拌步驟以及抽氣過濾步驟，尤其是利用第一氧化步驟及第二氧化步驟的二階段的氧化處理，並分別藉具有不同氧化能力的第一氧化劑及第二氧化劑，適當控制石墨烯氧化物中所包含的碳元素對氧元素的比率範圍，用以在還原步驟中，製造電阻率為1.45~150Ω/cm的還原後的石墨烯材料。Disclosed is a method of manufacturing graphene material, including steps of first oxidation, first heating, second heating, second oxidation, separation, drying, first ultrasonic vibration, reduction, second ultrasonic vibration, heating, and filtration. The first oxidation and the second oxidation respectively employ the first oxidant and the second oxidant with different strength of oxidation to appropriately control the range of the ratio of carbon vs. oxygen content in the graphene oxide. Therefore, the resultant graphene material through the reduction process has resistivity within 1.45˜150 Ω/cm.

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