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作者:

Yang, Decai (Yang, Decai.) | Ye, Qing (Ye, Qing.) | Qu, Chao (Qu, Chao.) | Meng, Fanwei (Meng, Fanwei.) | Wang, Lanyang (Wang, Lanyang.) | Li, Yongqi (Li, Yongqi.)

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EI Scopus SCIE

摘要:

In the quest to enhance photocatalytic performance, structural regulation and interface engineering stand out as effective strategies for amplifying active sites and fostering the separation of photogenerated electron-hole pairs. In this study, a pioneering approach was employed, utilizing a straightforward two-step calcination method to prepare a novel photocatalyst: porous graphite carbon nitride (g-C3N4, CN) nanosheets (NS) loaded with mesoporous cerium oxide (CeO2/CNNS). The distinctive architecture of CeO2/CNNS not only elevates the specific surface area and catalytic active sites but also facilitates efficient mass transfer. Experimental results and density functional theory (DFT) calculations corroborate the existence of an internal electric field (IEF) within the Zscheme heterojunction formed by uniformly dispersed CeO2 and CNNS. This IEF proves pivotal in promoting charge separation and migration, thereby maintaining robust redox capabilities. Under visible light irradiation, CeO2/CNNS demonstrates an impressive 4.2-fold increase in the hydrogen production rate compared to bulk gC3N4 (BCN), coupled with a 48.5% boost in the photocatalytic degradation rate constant (k) of tetracycline (TC). This study not only unveils the innovative design of CeO2/CNNS but also paves the way for a fresh perspective on the design and preparation of multifunctional photocatalysts.

关键词:

Cerium oxide Z-scheme heterojunction Photocatalytic hydrogen evolution Tetracycline Graphite carbon nitride

作者机构:

  • [ 1 ] [Yang, Decai]Beijing Univ Technol, Coll Environm Sci & Engn, Dept Environm Sci, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China
  • [ 2 ] [Ye, Qing]Beijing Univ Technol, Coll Environm Sci & Engn, Dept Environm Sci, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China
  • [ 3 ] [Qu, Chao]Beijing Univ Technol, Coll Environm Sci & Engn, Dept Environm Sci, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China
  • [ 4 ] [Meng, Fanwei]Beijing Univ Technol, Coll Environm Sci & Engn, Dept Environm Sci, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China
  • [ 5 ] [Wang, Lanyang]Beijing Univ Technol, Coll Environm Sci & Engn, Dept Environm Sci, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China
  • [ 6 ] [Li, Yongqi]Beijing Univ Technol, Coll Environm Sci & Engn, Dept Environm Sci, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China

通讯作者信息:

  • [Qu, Chao]Beijing Univ Technol, Coll Environm Sci & Engn, Dept Environm Sci, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China;;

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来源 :

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

ISSN: 2213-2929

年份: 2024

期: 3

卷: 12

7 . 7 0 0

JCR@2022

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SCOPUS被引频次: 19

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