期刊
ACS APPLIED ENERGY MATERIALS
卷 4, 期 5, 页码 4365-4375出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c03168
关键词
Z-scheme photocatalyst; 2D porous g-C3N4; phosphorus-doped; WO3 nanotubes; hydrogen evolution; stable architecture
资金
- National Natural Science Foundation of China [52072182, 51602161, U1732126, 51872145]
- China Postdoctoral Science Foundation [2019M650120]
- Ministry of Education of China [IRT1148]
- National Synergetic Innovation Center for Advanced Materials (SICAM)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) [YX03001]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX19_0982, KYCX18_0921, KYCX19_0985]
Thinning, doping, and reticulation have been effective strategies to improve the efficiency of photocatalysis, and embedding one-dimensional WO3 nanotubes into the frameworks of two-dimensional porous g-C3N4 has shown impressive performance for hydrogen generation in visible-light-driven H-2 production.
Recently, two-dimensional (2D) g-C3N4 has attracted great interest for visible-light-driven H-2 production. Thinning, doping, and reticulation have been demonstrated as effective strategies to improve the efficiency of photocatalysis, but are a challenge for structural stability. Herein, a targeted method was implemented by embedding the one-dimensional (1D) WO3 nanotubes matrix into the frameworks of 2D porous g-C3N4 to form a porous P-doped g-C3N4 nanosheets/WO3 nanotubes (PCNS/WNT) by a flexible electrostatic self-assembly process. As a visible-light-sensitive photocatalyst, the as-prepared hybrids exhibited impressive performance for hydrogen generation, which was attributed to the advantages of synergetic mechanism owing to a higher specific surface area, more reaction active sites, enhanced light absorption, and a better photogenerated carrier separation. Interestingly, the insertion of 1D WO3 nanotubes not only accelerates electrons transfer along the 1D channel but also provides robust support for 2D porous g-C3N4 architecture. As a result, the maximum photocatalytic H-2 evolution rate of PCNW-50 is 547 mu mol g(-1) h(-1), which is about four times higher than that of pure PCNS, and there is no significant reduction of H-2 production after five cycles. Moreover, this 2D/1D PCNS/WNT hybrid was first reported in the area of photocatalytic hydrogen evolution and provides ideas for designing novel stable architecture of photocatalyst.
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