A "ship-in-a-bottle" strategy to fabricate highly crystallized nanoporous graphitic C3N4 microspheres under pressurized conditions

Si, Yinsong1; Sun, Zongzhao2; Huang, Limin2; Chen, Min1; Wu, Limin1

2019-04-21

10.1039/c9ta00151d

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

Graphitic carbon nitride (g-C3N4) is a promising visible light photocatalyst but shows only moderate activity due to its high carrier recombination and low charge mobility. Herein, we synthesize a novel kind of nanoporous g-C3N4 microsphere (Np-CNM) with highly improved crystallinity via a ship-in-a-bottle strategy using mesoporous hollow silica spheres as nanoreactors. Confined thermal polymerization of the precursor inside the hollow cavity under pressurized conditions provide Np-CNMs with a highly nanoporous structure and improve crystallinity simultaneously which can not only significantly suppress the carrier recombination but also accelerate the interlayer charge transfer. The as-obtained Np-CNMs demonstrate a considerably enhanced photocatalytic hydrogen evolution rate (5785 mol(-1) h(-1) g(-1)) under visible-light irradiation ( 420 nm), which is more than 44 and 30 times that of bulk g-C3N4 and Np-CNMs produced at atmospheric pressure, respectively. This work identifies a reliable route to obtain highly crystallized nanostructured g-C3N4 microspheres, which are important for constructing high performance photocatalysts.

SCI ; EI

英语

其他

Development Fund for Shanghai Talents[201643]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000465152700025

ROYAL SOC CHEMISTRY

20191606792502

Atmospheric pressure ; Carbon nitride ; Charge transfer ; Crystallinity ; Light ; Microspheres ; Photocatalytic activity ; Ships ; Silica

Atmospheric Properties:443.1 ; Packaging Materials:694.2 ; Light/Optics:741.1 ; Chemical Reactions:802.2

Web of Science

1.Fudan Univ, State Key Lab Mol Engn Polymers, Dept Mat Sci, Shanghai 200433, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China

Si, Yinsong,Sun, Zongzhao,Huang, Limin,et al. A "ship-in-a-bottle" strategy to fabricate highly crystallized nanoporous graphitic C3N4 microspheres under pressurized conditions[J]. Journal of Materials Chemistry A,2019,7(15):8952-8959.

Si, Yinsong,Sun, Zongzhao,Huang, Limin,Chen, Min,&Wu, Limin.(2019).A "ship-in-a-bottle" strategy to fabricate highly crystallized nanoporous graphitic C3N4 microspheres under pressurized conditions.Journal of Materials Chemistry A,7(15),8952-8959.

Si, Yinsong,et al."A "ship-in-a-bottle" strategy to fabricate highly crystallized nanoporous graphitic C3N4 microspheres under pressurized conditions".Journal of Materials Chemistry A 7.15(2019):8952-8959.