J. Mater. Sci. Technol. ›› 2020, Vol. 41: 117-126.DOI: 10.1016/j.jmst.2019.09.018
• Research Article • Previous Articles Next Articles
Yanmei Zhenga, Yuanyuan Liua, Xinli Guoa*(), Zhongtao Chena, Weijie Zhanga, Yixuan Wanga, Xuan Tanga, Yao Zhanga, Yuhong Zhaob*()
Received:
2019-06-24
Revised:
2019-08-26
Accepted:
2019-09-10
Published:
2020-03-15
Online:
2020-04-10
Contact:
Guo Xinli,Zhao Yuhong
Yanmei Zheng, Yuanyuan Liu, Xinli Guo, Zhongtao Chen, Weijie Zhang, Yixuan Wang, Xuan Tang, Yao Zhang, Yuhong Zhao. Sulfur-doped g-C3N4/rGO porous nanosheets for highly efficient photocatalytic degradation of refractory contaminants[J]. J. Mater. Sci. Technol., 2020, 41: 117-126.
Fig. 2. SEM images of (a)-(c) CN, CN PNs and MCA with different magnification, and (d) S-CN/rGO2.5 PNs, S-CN/rGO5 PNs and S-CN/rGO7.5 PNs; TEM images of (e-1) CN PNs, and (e-2, e-3) S-CN/rGO5 PNs hybrid with different magnification.
Fig. 6. N2 adsorption-desorption isotherms and the corresponding pore size distribution (the inset) calculated by the BJH method for CN, CN PNs and S-CN/rGO5 PNs.
Fig. 7. Photocatalytic degradation activity (a), and Photo degradation spectra (b) of RhB by as-prepared samples; (c) UV-vis spectra of RhB solution with S-CN/rGO5 PNs under sunlight; (d) Cyclic stability of S-CN/rGO5 PNs for photocatalytic RhB degradation (RhB concentration: 15 mg/L, photocatalyst dosage: 10 mg, volume:50 mL, irradiation time: 60 min, 5 cycles).
Fig. 8. (a) Photocatalytic degradation rates of Cr(VI) by as-prepared samples and without catalyst(C(K2Cr2O7) = 10 mg mL-1, pH = 3); (b) Photodegradation activity of Cr(VI) by S-CN/rGO5 PNs under different pH (C(K2Cr2O7) = 10 mg mL-1) and different Cr(VI) concentrations (c) (pH = 3); (d) Cyclic stability of S-CN/rGO5 PNs for photocatalytic degradation of Cr(VI) (C(K2Cr2O7) = 10 mg mL-1, pH = 3, 5 cycles).
Fig. 9. (a) LSV curves, (b) Transient photocurrent responses, (c) EIS Nyquist plots, and (d) Mott-Schottky plots of CN, CN PNs and CN/rGOx PNs obtained in 0.1 M Na2SO4 electrolyte under irradiation of simulated sunlight.
Fig. 12. Photodegradation of RhB in active species trapping experiment with S-CN/rGO PNs as photocatalyst (RhB concentration: 20 mg/L, photocatalyst dosage: 10 mg, volume: 50 mL).
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