N-doped carbon nanotubes enhanced charge transport between Ni nanoparticles and g-C3N4 nanosheets for photocatalytic H2 generation and 4-nitrophenol removal
Authors:
- Tong Song,
- Xiao Zhang,
- Cong Xie,
- Ping Yang
Abstract
Carbon nanotubes with well conductivity can improve photogenerated carrier separation and transport for enhanced photocatalytic performance. In this paper, Ni nanoparticles embedded N-doped carbon nanotubes (CNTs) were decorated on superior thin g-C3N4 nanosheets as a co-catalyst via a mechano-chemical pre-reaction and thermal polymerization at high temperature. The admirable conductivity and unique one-dimensional structure of Ni-decorated CNTs (NiCNTs) generated more active sites and supplied efficient charge transfer. Abundant unpaired electron and π-conjugated structure of N-doped CNTs promoted the delocalization, retarded recombination, and stabilized charge separation. Ni nanoparticles acted as active sites to trap photogenerated electrons for photoreduction reaction. g-C3N4/NiCNTs composites with an optimized ratio revealed a hydrogen (H2) generation rate as high as 1050.4 μmol g−1 h−1, exhibiting an increase of ∼137 times compared with pure g-C3N4 without using Pt as co-catalyst. The H2 generation rate was even higher than that of g-C3N4/Pt, suggesting that NiCNTs can substitute noble metals completely. In addition, the g-C3N4/NiCNTs sample removed 4-nitrophenol (4-NP) within 10 min under visible light irradiation. The rate constant of g-C3N4/NiCNTs sample was ∼49 times of that of pristine g-C3N4. This work proposed a novel bifunctional catalyst for pollutant treatment and clean energy production.
- Record ID
- CUT1b0f7df568274cb195e7daae194218e3
- Publication categories
- ;
- Author
- Journal series
- Carbon, ISSN 0008-6223, e-ISSN 1873-3891
- Issue year
- 2023
- Vol
- 210
- Pages
- 1-9
- Article number
- 118052
- Other elements of collation
- fot.; rys.; schem.; tab.; wykr.; Bibliografia (na s.) - 8-9; Bibliografia (liczba pozycji) - 39; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 210
- Keywords in English
- g-C3N4, carbon nanotubes, nickel, photocatalysis, hydrogenation
- ASJC Classification
- DOI
- DOI:10.1016/j.carbon.2023.118052 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/abs/pii/S0008622323002932 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT1b0f7df568274cb195e7daae194218e3/
- URN
urn:pkr-prod:CUT1b0f7df568274cb195e7daae194218e3
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.