Upgrading coal to multifunctional graphene-based materials by direct laser scribing

Despite much progress, developing a cost-effective and environmental-friendly method to upgrade earth-abundant coal into high value-added products is still a grand challenge. Here, we report a one-step and facile approach to synthesize graphene based materials from coal under ambient conditions via...

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Bibliographic Details
Published in:Carbon (New York) 2019-11, Vol.153, p.585-591
Main Authors: Zhang, Chi, Xie, Yunchao, Zhang, Cheng, Lin, Jian
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbon dioxide lasers
catalytic activity
Coal
Conductivity
cost effectiveness
Dopamine
Dopamine sensing
electrical conductivity
Electrical resistivity
Electrocatalysis
electrochemistry
Graphene
heat
Joule heater
Laser scribing graphene
Lasers
manufacturing
Ohmic dissipation
Oxygen evolution reactions
oxygen production
Resistance heating
Supercapacitors
supply chain
value-added products
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Summary:Despite much progress, developing a cost-effective and environmental-friendly method to upgrade earth-abundant coal into high value-added products is still a grand challenge. Here, we report a one-step and facile approach to synthesize graphene based materials from coal under ambient conditions via direct CO2 laser scribing. The obtained laser scribed graphene from coal (C-LSG) has been well characterized, showing good electrical conductivity (12 Ω/square), high electrochemical sensitivity and ionic storage properties. These properties make C-LSG a multifunctional material for applications in Joule heating, electrochemical dopamine sensing, and supercapacitors. Moreover, when electrochemically deposited with FeNi hydroxide, the hybridized FeNi/C-LSG shows impressive electrocatalysis performance toward oxygen evolution reaction. As such, this direct laser scribing of coal into graphene based materials can not only potentially expands new business opportunities by adding coal into the value-chain of industries that usually do not use coal as the starting materials in their manufacturing processes but also brings down the cost of the graphene based materials, which would make their deployment in various field more economically attractive. A direct laser scribing technology was adopted to upgrade coal into high-value graphene-based materials (C-LSG). It is much superior to the conventional methods in terms of much less restricted reaction conditions, time and cost saving. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2019.07.070