期刊
APPLIED SURFACE SCIENCE
卷 332, 期 -, 页码 625-630出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.01.233
关键词
g-C3N4; Tunable band gap; Potassium; Sodium; Molten salt method
类别
资金
- Education Department of Liaoning Province [L2013150]
- Natural Science Foundation of Liaoning Shihua University [2011XJJ-021]
Novel band gap-tunable K-Na co-doped graphitic carbon nitride was prepared by molten salt method using melamine, KCl, and NaCl as precursor. X-ray diffraction (XRD), N-2 adsorption, Scanning electron microscope (SEM), UV-vis spectroscopy, Photoluminescence (PL), and X-ray photoelectron spectroscopy (XPS) were used to characterize the prepared catalysts. The CB and VB potentials of graphitic carbon nitride could be tuned from -1.09 and +1.55 eV to -0.29 and +2.25 eV by controlling the weight ratio of eutectic salts to melamine. Besides, ions doping inhibited the crystal growth of graphitic carbon nitride, enhanced the surface area, and increased the separation rate of photogenerated electrons and holes. The visible-light-driven Rhodamine B (RhB) photodegradation and mineralization performances were significantly improved after K-Na co-doping. (C) 2015 Elsevier B.V. All rights reserved.
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