期刊
ENVIRONMENTAL SCIENCE-NANO
卷 9, 期 5, 页码 1879-1887出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2en00206j
关键词
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资金
- Ministry of Science and Technology (MOST) of Taiwan [MOST 107-2628-E-006-001-MY3]
- Australian Research Council [DP190101734]
This study systematically evaluated the photocatalysis of graphitic carbon nitride (g-C3N4) modified with carbon-based nanomaterials (CBNs). The results showed that the type and loading amount of the CBNs had a significant impact on the photocatalytic activity of g-C3N4. The findings highlight the importance of CBNs in achieving highly reactive g-C3N4 photocatalysts.
Despite great interest in modifying graphitic carbon nitride (g-C3N4) with carbon-based nanomaterials (CBNs) towards photocatalysis, no study has systematically evaluated the efficacy of 0-2D CBNs. This work examined the photocatalysis of bisphenol A and tetracycline (BPA and TC) by g-C3N4 modified with 0D C-60, 1D single-walled and multi-walled carbon nanotubes (SWCNTs and MWCNTs), and 2D graphene oxide. Notably, the relative efficacy of g-C3N4/CBNs in photocatalysis can be readily tuned with CBN loading contents. g-C3N4 modified with SWCNTs (g-C3N4/SWCNT) usually exhibited superior photoreactivity with the only exception for 0.05% CBN loading where g-C3N4/MWCNT was the most photoactive. g-C3N4/C-60 showed the least photoreactivity. The photocatalyst's surface areas, light absorption, electrical resistance, and tendency of electron-hole recombination altogether can largely explain the observed photoreactivity. Superoxide was the primary radical responsible for the photocatalysis of BPA and TC. The result indicates that both CBN types and loading amounts are influential factors in the synthesis of highly reactive g-C3N4 modified with 0-2D CBNs, whose relative efficacy can be readily tuned with CBN loading.
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