Continuous flow fabrication of green graphene oxide in aqueous hydrogen peroxide

Autor: Kasturi Vimalanathan, James Scott, Xun Pan, Xuan Luo, Soraya Rahpeima, Qiang Sun, Jin Zou, Nidhi Bansal, Elisabeth Prabawati, Wei Zhang, Nadim Darwish, Mats R. Andersson, Qin Li, Colin L. Raston
Rok vydání: 2022
Předmět:
Zdroj: Nanoscale Advances. 4:3121-3130
ISSN: 2516-0230
DOI: 10.1039/d2na00310d
Popis: Highly processible graphene oxide (GO) has a diversity of applications as a material readily dispersed in aqueous media. However, methods for preparing such free-standing GO use hazardous and toxic reagents and generate significant waste streams. This is an impediment for uptake of GO in any application, for developing sustainable technologies and industries, and overcoming this remains a major challenge. We have developed a robust scalable continuous flow method for fabricating GO directly from graphite in 30% aqueous hydrogen peroxide which dramatically minimises the generation of waste. The process features the continuous flow thin film microfluidic vortex fluidic device (VFD), operating at specific conditions while irradiated sequentially by UV LED than a NIR pulsed laser. The resulting 'green' graphene oxide (gGO) has unique properties, possessing highly oxidized edges with large intact sp
Databáze: OpenAIRE