Alkali-assisted hydrothermal preparation of g-C3N4/rGO nanocomposites with highly enhanced photocatalytic NOx removal activity

Zhanyong Gu, Biao Zhang, Yusuke Asakura, Satoshi Tsukuda, Hideki Kato, Masato Kakihana, Shu Yin*

*この研究の対応する著者

研究成果: Article査読

22 被引用数 (Scopus)

抄録

Graphitic carbon nitride / reduced graphene oxide (g-C3N4/rGO) nanocomposites have become research hotspots owing to its excellent charge carrier separation efficiency and enhanced photocatalytic activity. Herein, we developed a facile alkali-assisted hydrothermal strategy to prepare g-C3N4/rGO nanocomposites. In the hydrothermal process, the NaOH not only played an important role in etching the bulk g-C3N4 into nanosheets to increase its specific surface area and active sites, but also promoted the reduction of GO to enhance the conductivity of rGO. The rGO sheets could act as an excellent electron acceptor and electronic conductive channels to improve the separation efficiency of photogenerated electron-hole pairs. The resultant g-C3N4/rGO nanocomposites exhibited 2.7 times higher photocatalytic NOx removal activity than that of bulk g-C3N4 due to the enlarged specific surface area and the enhanced separation efficiency of photogenerated carriers. Moreover, the obtained metal-free photocatalyst displayed outstanding photocatalytic performance under visible light irradiation (λ˃400 nm), compared with previously reported traditional-metal-based semiconductor photocatalysts. This work may provide new insights into preparing g-C3N4/rGO nanocomposites with enhanced photocatalytic activity.

本文言語English
論文番号146213
ジャーナルApplied Surface Science
521
DOI
出版ステータスPublished - 2020 8 15
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 物理学および天文学(全般)
  • 表面および界面
  • 表面、皮膜および薄膜

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「Alkali-assisted hydrothermal preparation of g-C<sub>3</sub>N<sub>4</sub>/rGO nanocomposites with highly enhanced photocatalytic NO<sub>x</sub> removal activity」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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