Amorphous Carbon-Rich Carbon-Nitride-Based Photocatalyst for Selective C−C Bond Cleavage in Lignin β-O-4 Linkages
リグニンβ-O-4結合の選択的C−C結合開裂のための非晶質炭素リッチ炭素窒化物光触媒 (AI 翻訳)
Chun-Yin Lau, Xinwei Li, Yanlin Zhang, Goutham Rangarajan, Ho-Yin TSE, Huichuan Zhuang, Shao‐Yuan Leu, Ramin Farnood
🤖 gxceed AI 要約
日本語
本研究では、硝酸処理と窒素アニーリングにより非晶質炭素リッチの窒化炭素光触媒を合成。価電子帯上方シフトにより光生成ホールの酸化力を高め、リグニンβ-O-4結合の選択的Cα-Cβ開裂を実現。青色LED下で93.1%の選択率でベンズアルデヒドを生成し、有機溶媒リグニンの光触媒的分解により低分子ジカルボン酸を生成。
English
This study presents an amorphous carbon-rich carbon nitride photocatalyst synthesized via nitric acid treatment and nitrogen annealing. The up-shifted valence band enhances hole oxidizing power, enabling selective Cα−Cβ bond cleavage in lignin β-O-4 linkages with 93.1% selectivity under blue LED. Photocatalytic depolymerization of organosolv lignin yields low-molecular-weight aliphatic dicarboxylic acids.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
バイオマス利用の高度化は日本のGX戦略の一環だが、本研究は基礎的であり、実用化には遠い。日本のSSBJや有報には直接的関係なし。
In the global GX context
Lignin valorization supports biomass utilization for circular bioeconomy, relevant to global renewable feedstock efforts, but this is fundamental catalysis research without direct disclosure or policy implications.
👥 読者別の含意
🔬研究者:Provides a metal-free photocatalytic approach for selective lignin bond cleavage, valuable for biomass conversion R&D.
📄 Abstract（原文）
High Resolution Image Download MS PowerPoint Slide In this study, an amorphous carbon-rich carbon nitride photocatalyst was prepared by nitric acid treatment of pyrolyzed melamine followed by nitrogen annealing. The resulting semiconductor material exhibited an up-shifted valence band that enhances the oxidizing power of photogenerated holes, enabling selective C α −C β bond cleavage of 2-phenoxy-1-phenylethanol (2-POE). Using 1.5 g L −1 of the optimized photocatalyst in acetonitrile, 2-POE underwent first-order conversion with a reaction rate of 2.55 h −1 under a 9 W blue LED light source. Product analysis showed the formation of benzaldehyde as the major product, confirming C−C bond scission with 93.1% selectivity. In addition, ring-opening reactions were observed, producing fumaric and maleic acids as the by-products. Photocatalytic depolymerization of organosolv lignin further demonstrated ring opening of the β-O-4 linking motifs, forming dicarboxylic acids analogous to those generated from 2-POE. These demonstrate a metal-free photocatalytic platform capable of promoting β-O-4 bond cleavage in lignin model compounds and inducing photocatalytic structural modification of organosolv lignin, accompanied by the formation of low-molecular-weight aliphatic dicarboxylic acids.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acssuschemeng.6c00052first seen 2026-07-23 05:26:09
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