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Practical Preparation of Carbon Black/Carbon Nitride Compounds and Their Photocatalytic Performance
Shaozheng Hu,Haoying Wang,Fei Wang,Jin Bai,Lei Zhang,Xiaoxue Kang,GuangWu 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.10
Here we report a carbon-black-modified g-C3N4 nanocomposite prepared by a convenient method and its photocatalytic performance, which was compared with other carbon-material-, carbon nanotube (CNT)-, C60-, and graphene (GR)-modified g-C3N4 nanocomposites. X-ray diffraction, N2 adsorption, UV–vis spectroscopy, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and photoluminescence were used to characterize the prepared composite material. The results reveal that incorporating g-C3N4 with carbon materials decreases the bandgap and the electron–hole recombination rate of the prepared catalysts. No significant difference was observed in the structural and optical properties among these four series of carbon-material-modified g-C3N4 nanocomposites. Carbon-based materials cannot act as visible-light sensitizers but they can facilitate the separation and transport of photogenerated carriers. These composites obey a tentative reaction mechanism similar to rhodamine B (RhB) photocatalytic degradation. Carbon-black-modified g-C3N4 exhibits comparable activity and stability as those of GR-modified g-C3N4 , which is better than the modification by C60 and CNTs. Compared to CNTs, GR, and C60 , carbon black is a cheap and effective carbon source with excellent photocatalytic performance for the preparation of carbon material/g-C3N4 nanocomposites.
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Yuanhao Guan,Shaozheng Hu,Ping Liang,Yanfeng Zhao,Fei Wang,Xiaoxue Kang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.7
"In this work, a highly efficient p-type Cu3P/n-type g-C3N4 heterojunction photocatalyst was synthesized in situ. XRD, UV–Vis, N2 adsorption, TEM, XPS, PL, and EIS are used to characterize the as-prepared catalysts. The results show that Cu3P nanoparticles are highly dispersed onto the g-C3N4 surface, which obviously promotes the separation rate of electrons and holes. The charge transfer between Cu3P and g-C3N4 follows the ""Z-scheme"" mechanism. The as-prepared Cu3P/g-C3N4 heterojunction photocatalyst displays the ammonium ion production rate of 7.5 mg L -1 h -1 g cat -1, which is 28.8 times higher than that of neat g-C3N4, as well as good catalytic stability. The possible reaction mechanism is proposed."
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