Chao Li, Jie Li, Yanbin Huang, Jun Liu, Mengmeng Ma, Kong Liu, Chao Zhao, Zhijie Wang, Shengchun Qu, Lei Zhang, Haiyan Han, Wenshuang Deng, Zhanguo Wang. Recent development in electronic structure tuning of graphitic carbon nitride for highly efficient photocatalysis[J]. Journal of Semiconductors, 2022, 43(2): 021701
- Journal of Semiconductors
- Vol. 43, Issue 2, 021701 (2022)
![(Color online) The schematic structure of triazine (a) and tri-s-triazine (heptazine) (b) in g-C3N4. Reprinted from Ref. [10].](/richHtml/jos/2022/43/2/021701/img_1.jpg)
Fig. 1. (Color online) The schematic structure of triazine (a) and tri-s-triazine (heptazine) (b) in g-C3N4. Reprinted from Ref. [10 ].
Fig. 2. (Color online) The process of overall solar water splitting over a semiconductor photocatalyst.
![(Color online) (a) The UV–vis absorption spectra, (b) converted Kubelka–Munk vs. light energy plots and (c) XPS valence band spectra of CN and CNQs. (d) The schematic band structures of CN and CNQ 680. Reprinted from Ref. [22].](/Images/icon/loading.gif){kind=icon}
Fig. 3. (Color online) (a) The UV–vis absorption spectra, (b) converted Kubelka–Munk vs. light energy plots and (c) XPS valence band spectra of CN and CNQs. (d) The schematic band structures of CN and CNQ 680. Reprinted from Ref. [22 ].
Fig. 4. (Color online) Schematic illustration of synthesis methods of DTLP-CN via thermal polymerization of melamine, urea, and KOH. Reprinted from Ref. [25 ].
Fig. 5. (Color online) (a) Schematic structure of the O-doped g-C3N4-based photocatalyst. (b) Band structure diagrams of g-C3N4 and O-doped g-C3N4. (c) Schematic of the fabrication of BDCNN originated from CNN and (d) the charge-transfer process in BDCNN-based heterojunction upon light irradiation. Reprinted from Refs. [36 , 40 ].
Fig. 6. (Color online) (a) UV–vis diffuse reflectance spectra, (b) the band gap from (αh v )1/2 vs. photon energy, (c) valance band XPS spectra, and (d) schematic illustration of the band gap structure of pristine and doped g-C3N4 samples. Reprinted from Ref. [45 ].
Fig. 7. (Color online) (a) UV–visible diffuse reflectance spectrum (DRS) and (b) HOMO and LUMO positions of CN, CN-LiNa, CN-NaK, and CN-LiK. (c) UV–vis DRS and (b) bandgap structures for CN, crystalline CN, CCN and crystalline CCN. Reprinted from Refs. [52 , 54 ].
Fig. 8. (Color online) Schematic illustrations of basic structural units of polymeric carbon nitride with different C and N stoichiometric ratios: (a) triazine-based graphitic carbon nitride, (b) heptazine-based graphitic carbon nitride, (c, d) polymeric C3N5, (e) C3N6, (f) C3N7, and (g) C3N3. Reprinted from Ref. [56 ].
Fig. 9. (Color online) (a) Synthesis scheme of C3N5. (b) UV–Vis DRS for C3N5 compared with bulk g-C3N4. (c) Steady-state PL spectra of melem, g-C3N4 and C3N5. Reprinted from Ref. [61 ].
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