期刊
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
卷 5, 期 -, 页码 770-777出版社
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.5.89
关键词
graphitic carbon nitride (g-C3N4); heterojunction; photoelectrochemical; photocatalysis; sulfur doping
资金
- Nanyang Technological University
- Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE)
A biomolecule-assisted pyrolysis method has been developed to synthesize sulfur-doped graphitic carbon nitride (CNS) nanosheets. During the synthesis, sulfur could be introduced as a dopant into the lattice of carbon nitride (CN). Sulfur doping changed the texture as well as relative band positions of CN. By growing CN on preformed sulfur-doped CN nanosheets, composite CN/CNS heterojunction nanosheets were constructed, which significantly enhanced the photoelectrochemical performance as compared with various control counterparts including CN, CNS and physically mixed CN and CNS (CN+CNS). The enhanced photoelectrochemical performance of CN/CNS heterojunction nanosheets could be ascribed to the efficient separation of photoexcited charge carriers across the heterojunction interface. The strategy of designing and preparing CN/CNS heterojunction photocatalysts in this work can open up new directions for the construction of all CN-based heterojunction photocatalysts.
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