【公開日：2025.06.10】【最終更新日：2025.05.20】

課題データ / Project Data

課題番号 / Project Issue Number

24UT0201

利用課題名 / Title

Carbon sulfonation by plasma technique

利用した実施機関 / Support Institute

東京大学 / Tokyo Univ.

機関外・機関内の利用 / External or Internal Use

外部利用/External Use

技術領域 / Technology Area

【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-

【重要技術領域 / Important Technology Area】（主 / Main）革新的なエネルギー変換を可能とするマテリアル/Materials enabling innovative energy conversion（副 / Sub）次世代ナノスケールマテリアル/Next-generation nanoscale materials

キーワード / Keywords

エネルギー貯蔵/ Energy storage,ナノチューブ/ Nanotube,電子分光/ Electron spectroscopy

利用者と利用形態 / User and Support Type

利用者名（課題申請者）/ User Name (Project Applicant)

Deng Siqi

所属名 / Affiliation

東京科学大学工学部電気電子工学科

共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes

Yao Kaixun

ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes

利用形態 / Support Type

（主 / Main）機器利用/Equipment Utilization（副 / Sub）-

利用した主な設備 / Equipment Used in This Project

UT-308：多機能走査型X線光電子分光分析装置(XPS)with AES

報告書データ / Report

概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)

This study aims to evaluate the catalytic efficiency of sulfonated carbon materials for cellulose hydrolysis to glucose, a key step in biomass fuel synthesis. By comparing the surface functional group distribution and catalytic performance of untreated Carbon Nanotubes (CNTs) and Graphene Nanoplatelets (GNPs), the research identifies the most suitable carbon material for sulfonation and catalytic applications. The findings offer valuable insights into the role of surface chemistry in enhancing catalytic efficiency and contribute to the development of more efficient, environmentally-friendly catalysts for biomass conversion and renewable energy production.

実験 / Experimental

This study involves mixing carbon materials with cellulose, followed by grinding and subjecting the mixture to hydrothermal decomposition in a reaction kettle for 24 hours. After the reaction, the product composition in the resulting liquid is analyzed using High-Performance Liquid Chromatography (HPLC) and Total Organic Carbon (TOC) analysis. On the other hand, the surface functional group distribution of the two materials is investigated through X-ray Photoelectron Spectroscopy (XPS;VersaProbeIII). Finally, the results of the two materials are compared and analyzed to assess their catalytic performance

結果と考察 / Results and Discussion

The catalytic hydrothermal reaction using untreated CNTs resulted in a glucose yield of 11.86%, while the reaction using untreated GNPs yielded a glucose yield of 13.95%. The XPS spectra of both materials are shown in the attached figures. Based on the spectral analysis, it can be observed that GNPs have a higher content of weak acidic functional groups, such as OH and COOH, compared to CNTs. These functional groups play a crucial role in facilitating the interaction between carbon materials and cellulose through hydrogen bonding. As a result, untreated GNPs exhibit better catalytic performance than CNTs and are potentially more suitable for the preparation of sulfonated catalysts.

図・表・数式 / Figures, Tables and Equations

Fig. 1  C1s XPS spectra of untreated CNT

Fig. 2  C1s XPS spectra of untreated GNP

その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)

成果発表・成果利用 / Publication and Patents

論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)

口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.

特許 / Patents

特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件