College of Materials Science and Engineering , Beijing University of Chemical Technology , Beijing 100029 , China.
SINOPEC Beijing Research Institute of Chemical Industry , Beijing 100013 , China.
ACS Appl Mater Interfaces. 2018 Jul 25;10(29):24776-24783. doi: 10.1021/acsami.8b06070. Epub 2018 Jul 13.
A conductive graphene-melamine sponge (MS) prepared via microwave irradiation is reported in this paper. Graphene oxide supported on the MS was prereduced first at 100 °C and then further reduced in a household microwave oven at over 1000 °C. It was surprising to find that graphene oxide on the MS was reduced perfectly while the three-dimensional structure of the MS was kept well after high-temperature reduction via microwave irradiation. Slight pyrolysis of MS was also found during 5 s microwave irradiation, resulting in nitrogen generation from the pyrolysis of the MS being doped into graphene, which could benefit the electric conductivity of the prepared graphene-MS. The electric conductivity of the prepared graphene-MS is about 0.12-1.0 S/m because of the high reduction degree of graphene oxide and nitrogen doping. On the other hand, different from the pure MS, the newly developed conductive graphene-MS possesses superhydrophobic and superoleophilic properties. Overall, the newly developed conductive graphene-MS contained 94.3 wt % MS and 5.7 wt % N-doped graphene and is a cost-effective material with good elasticity, high conductivity, superhydrophobicity, and superoleophilicity.
本文报道了一种通过微波辐射制备的导电石墨烯-三聚氰胺海绵（MS）。MS 上负载的氧化石墨烯首先在 100°C 下预还原，然后在家庭微波炉中在 1000°C 以上进一步还原。令人惊讶的是，发现在微波辐射高温还原过程中，MS 上的氧化石墨烯被完美还原，而 MS 的三维结构却保持良好。在 5 s 的微波辐射下，MS 也发生了轻微的热解，导致 MS 热解产生的氮掺杂到石墨烯中，这有利于制备的石墨烯-MS 的导电性。由于氧化石墨烯的高还原程度和氮掺杂，制备的石墨烯-MS 的电导率约为 0.12-1.0 S/m。另一方面，与纯 MS 不同，新开发的导电石墨烯-MS 具有超疏水和超亲油性。总的来说，新开发的导电石墨烯-MS 含有 94.3wt%的 MS 和 5.7wt%的 N 掺杂石墨烯，是一种具有良好弹性、高导电性、超疏水性和超亲油性的高性价比材料。
