1. Hierarchical meso/macro-porous TiO2/graphitic carbon nitride nanofibers with enhanced hydrogen evolution
- Author
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Chen Huajun, Xiaolei Shi, Yang Yanling, Zhigang Chen, Zou Xinxin, and Shaoli Song
- Subjects
Materials science ,Liquid paraffin ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Hierarchical ,law.invention ,chemistry.chemical_compound ,law ,lcsh:TA401-492 ,General Materials Science ,Calcination ,Hydrogen production ,Electrospinning ,Mechanical Engineering ,Graphitic carbon nitride ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Chemical engineering ,Mechanics of Materials ,Nanofiber ,Titanium dioxide ,Photocatalysis ,lcsh:Materials of engineering and construction. Mechanics of materials ,0210 nano-technology ,Hydrogen - Abstract
Constructing a hierarchical structure with tunable pore size is a practical method to improve the capacity of photocatalytic hydrogen production of catalysts. In this work, titanium dioxide/graphitic carbon nitride (TiO2/g-C3N4) nanofibers with hierarchical meso/macro-porous structure are fabricated by combining a one-step electrospinning method and calcination process, in which the hierarchical meso/macro-porous structure is developed by introducing polyvinylpyrrolidone and liquid paraffin into the electrospinning solution. Comprehensive characterizations reveal that the hierarchical meso/macro-porous TiO2/g-C3N4 nanofibers have improved ultraviolet-visible light absorption, the separation efficiency of carriers, and photocatalytic performance. The photocatalytic H2 evolution is up to 1202 μmol g−1 in 7 h, which is better than those of corresponding TiO2/g-C3N4 photocatalysts previously reported. This work provides a new strategy to build a hierarchical meso/macro-porous nanofiber and an ideal solution to improve the hydrogen production of TiO2/g-C3N4.
- Published
- 2021