Photocatalytic reforming of sugar and glucose into H2 over functionalized graphene dots

Van Can Nguyen, Nei Jin Ke, Le Duy Nam, Ba Son Nguyen, Yuan Kai Xiao, Yuh Lang Lee, Hsisheng Teng

研究成果: Article同行評審

41 引文 斯高帕斯(Scopus)

摘要

Photocatalytic reforming of biomass into H2 combined with its counterpart, photosynthesis, constitutes a sustainable carbon cycle that produces a clean solar fuel. This study reports the use of environmentally benign graphene-based photocatalysts to effectively reform sugar and glucose. We produce a catalyst consisting of sulfur and nitrogen codoped graphene oxide dots (SNGODs) by sequentially annealing graphite-derived graphene oxide with sulfur and ammonia, exfoliating the annealed product into dots, and autoclaving the dots in an ammonia solution. The codoping introduces quaternary nitrogen into the graphene basal plane to patch the vacancy defects and autoclaving creates a conjugation between nitrogen nonbonding states and the graphitic-π orbital by introducing peripheral amide and amino groups. These functionalization steps enlarge the electron resonance domain, narrowing the bandgap and inducing charge delocalization and separation. Here, SNGODs deposited with a Pt cocatalyst effectively catalyzed H2 production from aqueous solutions of sugar and glucose under visible light irradiation for more than 80 h. The apparent quantum yields of reforming of sugar and glucose reach 11% and 7.4%, respectively, under 420 nm monochromatic irradiation. This pioneer study demonstrates the superiority of using carbon-based photocatalysts for biomass reforming and provides a structure-tuning strategy for enhancing the catalytic activity.

原文English
頁(從 - 到)8384-8393
頁數10
期刊Journal of Materials Chemistry A
7
發行號14
DOIs
出版狀態Published - 2019

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 可再生能源、永續發展與環境
  • 一般材料科學

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