Direct conversion of rice husks to nanostructured SiC/C for CO2 photoreduction

Direct conversion of rice husks to nanostructured SiC/C for CO2 photoreduction

A one-step and template-free synthesis of a SiC nanowires/C (SiC-NW/C) composite from rice husks (RHs) is realized via a molten-salt-assisted electrochemical method. The process integrates simultaneously carbonization, electrodeoxidation, nanostructuring, and self-purification for converting RHs to...

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Bibliographic Details
Main Authors: Weng, Wei, Wang, Sibo, Xiao, Wei, Lou, David Xiong Wen
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2021
Subjects:
Engineering::Chemical engineering
Engineering::Materials
Molten Salt Electrolysis
Biomass Utilization
Online Access:https://hdl.handle.net/10356/147968
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Institution: Nanyang Technological University
Language: English
Description
Summary:A one-step and template-free synthesis of a SiC nanowires/C (SiC-NW/C) composite from rice husks (RHs) is realized via a molten-salt-assisted electrochemical method. The process integrates simultaneously carbonization, electrodeoxidation, nanostructuring, and self-purification for converting RHs to a SiC-NW/C hybrid that is assembled from SiC NWs embedded in porous N-doped graphitic carbon with strong coupling. The SiC-NW/C nanostructure enables efficient CO2 adsorption and fast separation and transfer of charge carriers. Benefiting from the structural and compositional merits, the SiC-NW/C composite shows superior activity for photoreduction of CO2 to CO, in the absence of any additional cocatalysts or sacrificial agents. The process proposed herein might help to bridge a closed-loop carbon cycle in the whole production-utilization of biomass.

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