The role of biocatalysts in the synthesis of graphene nanosheets from sub-bituminous coal

Q1 Materials Science Materials Science for Energy Technologies Pub Date : 2023-01-01 DOI:10.1016/j.mset.2023.02.004

Vivi Purwandari , Martha Rianna , Marpongahtun , Isnaeni Isnaeni , Yiming Zou , Mahyuni Harahap , Gratianus Halawa , Ronn Goei , Alfred Iing Yoong Tok

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Abstract

The synthesis of graphene nanosheets (GNs) from sub-bituminous coal aims to increase the added value of coal in a cheap, easy and proclaimed this method on an industrial scale. The addition of biocatalyst (BFS) in the pyrolysis process can reduce the reactive temperature of the pyrolysis process so that the combustion reaction runs better at low temperatures of 200-300℃. Followed by hydrothermal carbonization of coal at 180℃ for 6 h with the addition of pyrolysis liquid smoke. Filter the results and exfoliate using 24 kHz ultrasonication for 30 min. Then centrifuge at 10,000 rm for 10 min to separate the solids. Wash the solids with deionized water to obtain a neutral pH. Using FESEM and TEM to obtain the morphological characteristics of GNs, structural characterization was studied using XPS, FTIR, and XRD. The GNs produced using BFS yielded 7–8 layers of Graphene, and a crystal size of 2.7 nm showing promising efficiency from the methodology used.

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生物催化剂在亚烟煤合成石墨烯纳米片中的作用

从亚烟煤中合成石墨烯纳米片(GNs)旨在以一种廉价、简单的方式增加煤的附加值，并宣布该方法已达到工业规模。在热解过程中加入生物催化剂(BFS)可以降低热解过程的反应温度，使燃烧反应在200-300℃的低温下更好地进行。然后加入热解液烟，在180℃下水热炭化6 h。过滤结果，用24 kHz超声30分钟去角质。然后在10,000 rm下离心10分钟，分离固体。用去离子水洗涤固体，获得中性ph。利用FESEM和TEM获得GNs的形态特征，并利用XPS、FTIR和XRD进行结构表征。使用BFS生产的GNs产生了7-8层石墨烯，晶体尺寸为2.7 nm，显示出使用该方法的有希望的效率。

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