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<p>Scalable production of bulk graphene materials, by deoxygenation and partial graphitization of graphite oxide (GO), is considered the most mature pathway towards graphene-fortified products. We reimagined a combustion process in which a mixture of GO (the oxidant) and amino acid (high-energy fuel and reductant) undergoes solid-state reactions at relatively benign conditions (nominal temperature ~900 °C) to produce combusted reduced-graphite oxide (C-rGO) powders. The product is strewn with ordered and long graphene crystallites ( &gt; 80 nm long), exhibits heavily graphitized (002) reflections in XRD and sharp selected area diffraction patterns, with a high C/O ratio ( &gt; 18), and significant nitrogen doping (2.93 at%). We demonstrated that these inks can be printed into patterns on plastic substrates such as PET and roll-compressed to produce highly conductive thin films. Prototype chipless RFID tags were fabricated with a resonant microwave frequency of 3.986 GHz, capable of wireless reading from a distance of 28 mm.</p>

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Low-temperature graphitization by amine-assisted combustion of graphite oxide

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月1日

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  • Olalekan Solomon Oluwole,
  • Petar Jovanović,
  • Shadhon Chandra Mohonta,
  • Tuan Kien Nguyen,
  • Phillip Aitchison,
  • Nemai C. Karmakar,
  • Mainak Majumder

摘要

Scalable production of bulk graphene materials, by deoxygenation and partial graphitization of graphite oxide (GO), is considered the most mature pathway towards graphene-fortified products. We reimagined a combustion process in which a mixture of GO (the oxidant) and amino acid (high-energy fuel and reductant) undergoes solid-state reactions at relatively benign conditions (nominal temperature ~900 °C) to produce combusted reduced-graphite oxide (C-rGO) powders. The product is strewn with ordered and long graphene crystallites ( > 80 nm long), exhibits heavily graphitized (002) reflections in XRD and sharp selected area diffraction patterns, with a high C/O ratio ( > 18), and significant nitrogen doping (2.93 at%). We demonstrated that these inks can be printed into patterns on plastic substrates such as PET and roll-compressed to produce highly conductive thin films. Prototype chipless RFID tags were fabricated with a resonant microwave frequency of 3.986 GHz, capable of wireless reading from a distance of 28 mm.