Method for preparing composite of grapheme with different oxidation degrees and manganese dioxide

不同氧化程度的石墨烯与二氧化锰复合物的制备方法

Abstract

本发明公开了一种不同氧化程度的石墨烯与二氧化锰复合物的制备方法。该方法过程包括:采用原始石墨与质量浓度为98%的浓硫酸和高锰酸钾分别经过低、中、高温度分段反应制备氧化石墨;将氧化石墨分散于去离子水中并用水合肼将制备的氧化石墨还原,通过控制还原时间得到不同程度的氧化石墨烯;再将氧化石墨烯与MnCl2·4H2O混合于异丙醇溶液中,加入高锰酸钾的水溶液经过氧化还原制备得到不同程度氧化石墨烯与二氧化锰的复合物。本发明的优点在于,所用材料储量丰富,价格低廉,利于商业化;无需加入分散剂、稳定剂等,采用纯化学技术,操作简单无污染、低能耗,制备的氧化石墨烯与纳米二氧化锰复合材料纯度高,稳定性好。
The invention discloses a method for preparing composite of grapheme with different oxidation degrees and manganese dioxide. The method comprises the processes of: respectively carrying out low-temperature, intermediate-temperature and high-temperature subsection reactions on original graphite, and concentrated sulfuric acid with a mass concentration of 98% and potassium permanganate so as to obtain graphite oxide; dispersing the graphite oxide in de-ionized water, and reducing the prepared graphite oxide with hydrazine hydrate so as to obtain the grapheme oxide with different oxidation degrees by controlling reduction time; and mixing the grapheme oxide with MnCl2*4H2O in an isopropyl alcohol solution, and adding a water solution of the potassium permanganate to prepare the composite of the grapheme with the different oxidation degrees and the manganese dioxide through oxidation reduction. The method provided by the invention has the advantages as follows: materials used in the method are rich in storage amount and low in cost, so that the method is good in commercialization; an dispersing agent, a stabilizer and the like do not need to be added, and a pure chemical technology is used, so that simple operation, no pollution and low energy consumption can be realized; and the prepared composite material of the grapheme and the manganese dioxide has high purity and good stability.

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Patent Citations (2)

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    CN-101887806-ANovember 17, 2010南京理工大学氧化石墨烯负载纳米二氧化锰的制备方法
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