ACS Energy Letters-Sulfur-Mediated Self-Templating Synthesis of Tapered C?PAN/g?C3N4Composite Nanotubes toward Efficient Photocatalytic H2Evolution
作者：Fang He, ?,? Gang Chen,* ,? Jianwei Miao, ? Zhenxing Wang, ?,§ Dongmeng Su, § Song Liu, ? Weizheng C
關鍵字：C3N4
論文來源：期刊
發(fā)表時間：2016年
Hollow one-dimensional (1-D) nanostructures have drawn great
attention in heterogeneous photocatalysis. Herein, we report that tapered
polyacrylonitrile-derived carbon (C-PAN)/g-C3N4 composite nanotubes can be
synthesized through a facile sulfur-mediated self-templating method via thermal
condensation of polyacrylonitrile (PAN), melamine, and sulfur. The hollow tapered
C-PAN/g-C3N4 composite nanotubes exhibit superior photocatalytic H2 evolution
performance under visible light irradiation. The 5 wt % C-PAN/g-C3N4composite
nanotubes show a 16.7 times higher photocatalytic H2
evolution rate than that of
pure g-C3N4, which is even 4.7 times higher than that of a 5 wt % C-PAN/g-C
3N4
nanosheet composite obtained without sulfur. The hollow nanotubular composite
structure provides g-C
3N4
with higher specific surface area, enhanced light absorption, and better charge carrier separation
and transfer, which synergistically contribute to the superior photocatalytic activity. Our work provides a new strategy to
develop carbon-based architected photocatalysts.