A hierarchical carbon nitride tube with oxygen doping and carbon defects promotes solar-to-hydrogen conversion

Literature Information

Publication Date 2020-01-03
DOI 10.1039/C9TA13012H
Impact Factor 12.732
Authors

Wu Wang, Qianwen Chen, Yayun Pu, Weiman Zhuang


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Abstract

Micro-nanostructures, element doping and structural defects are three pivotal factors that determine the photocatalytic activity of the graphitic carbon nitride polymer. Green and additive-free construction of the above three-in-one carbon nitride (CN) based materials is extremely challenging. Herein the target hierarchical carbon nitride tube with a pipe-in-pipe double-layer and porous coral-like architecture as well as oxygen doping and carbon defects is successfully obtained via a self-templating method. Melamine is the only precursor in the whole process, and there are no harmful solvents or cross-linking agents used for self-assembly with cyanuric acid, which comes from melamine under hydrothermal treatment. Surpassing the simple hollow carbon nitride tube, this hierarchical hollow structure, which is clearly visualized by 3D electron tomography, offers more contact sites and creates new heterogeneous catalytic interfaces synergistically. Hence, the as-prepared photocatalyst achieves a satisfactory hydrogen yield, ascribed to the large surface area, short charge transfer distance, light scattering, fast mass transfer and suitable bandgap with midgap states. This eco-friendly method provides a new opportunity for designing novel micro-nanostructures with desirable performance in solar-to-chemical energy conversion.

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Source Journal

Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
Self-citation Rate: 4.7%
Articles per Year: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

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