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Sustainable Porous Carbons for Energy and Environment Applications [11月26日(金)福岡工業大学]

2021/11/28

■講師:Dr. Rajesh Madhu
(Seoul National University of Science and Technology)
■演題:Sustainable Porous Carbons for Energy and Environment Applications

■日時:令和3年11月26日(金)16:30 〜 18:00
■場所:Zoom オンライン
各大学の窓口委員からZoomアドレスが届きますので、ご参加ください。事前申し込みは不要です。

■主催:福岡工業大学
■申込/お問合せ:福岡工業大学大学院事務室
電話:092-606-6996 E-mail:master@fit.ac.jp

■概要:Nano- and micro-structured porous carbons are mostly synthesized from petrochemical precursors, synthetic polymers, and natural biomass. Rather than replacing materials made from fossil resources, biomass derived materials exhibit new properties complementing and very often outperforming their fossil counterparts. While the most sustainable precursor for synthesizing carbon structures is still under debate, biomasses present themselves as strong contenders in the field, attributed to their natural abundance, surplus hydrogen and carbon contents, and intrinsic functionalities associated with their structure. Hence, remarkable efforts have been made to synthesize porous carbons from abundant biomasses such as coconut shells, plant leaves, nutshell, wheat straw, and lignins. Depending on the biomass plant species, lignin accounts for approximately 15–40% of the dry weight of every plant, the polysaccharides, mainly cellulose and hemicellulose, make up the rest. In particular, lignin is the richest natural aromatic polymer in plants, which can be obtained from woods, and even from the industrial waste like paper mill effluents. Despite the differently existing change in molecular structures, in lignins, they all have high carbon content (60-75wt%) and thus can provide high yield after pyrolysis, essential synthesis step of electrically conductive carbons. Hence, lignin contains high purity carbon content, compared to other precursors with high specific surface area have been produced from various sources of biowaste materials because of their availability and cost effectiveness. Moreover, they tend to possess high surface area, complex pore structure, enriched heteroatoms, and various oxygen-containing functional groups in the carbon network, rendering advanced applications in environmental protection, energy storage and conversion devices, and sensors. This talk will cover the preparation of carbon-based materials (Porous carbons, Meso-porous carbon spheres, Carbon fibers) through benign processing methods such as hydrothermal carbonisation and electrospinning for electrochemical sensors, and energy storage applications.

■学生の関わり様:炭素材料に興味のある学生が多く参加しており、センサ応用やスーパーキャパシタ用電極に関する質問が多くあった。参加した多くの学生が質問しており、環境問題に対する意識が高い学生が多いことが伺えた。
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