Synthesis and Photocatalytic Properties of Cucurbit[6]uril/CdS-Ag2S Composite Photocatalyst

doi:10.15541/jim20190323

Abstract

Abstract:

CdS is widely used in photocatalytic research due to its unique photoelectrochemical properties. CdS recombination with narrow bandgap semiconductors and organic compounds plays an important role in photocatalyst exploration. In this study, a cucurbit[6]uril (Q[6]) composite and Ag₂S-doped cadmium sulfide photocatalyst (Q[6]/CdS-Ag₂S) were prepared by chemical precipitation method and their composite was characterized by different methods. The experiment is designed to use visible light as the light source and Rhodamine B as the simulated pollutant. Meanwhile, the effects of Q[6] on the photocatalytic performance of CdSAg₂S were investigated. The results showed that the morphology of Q[6]/CdS-Ag₂S composite after cucurbit[6]uril recombination was similar to cauliflower, while the particle size become smaller. Catalytic performance of the composite catalyst Q[6]/CdS-Ag₂S was significantly higher than that of CdS-Ag₂S, the photocatalytic reaction lasts 110 min, showing the catalytic degradation effciency of 92.4% using 15 mg composite catalyst on 100 mL, 6 mg/L Rhodamine B solution.

Key words: cucurbit[6] uril, composite catalyst, photocatalysis, dye

CLC Number:

O614

PENG Zhangmei,ZHAO Anting,FU Maofen. Synthesis and Photocatalytic Properties of Cucurbit[6]uril/CdS-Ag₂S Composite Photocatalyst[J]. Journal of Inorganic Materials, 2020, 35(6): 703-708.

Figures/Tables 7

Fig. 1 SEM images of CdS (a), Q[6]/CdS-Ag2S (b, c) with inset in (b) showing the corresponding EDS mapping and HRTEM image of CdS-Ag2S (d)

Fig. 2 XRD pattems of CdS and Q[6]/CdS-Ag2S

Fig. 3 Solid fluorescence spectra of CdS, CdS-Ag2S and Q[6]/CdS-Ag2S

Fig. 4 Raman spectra of CdS-Ag2S and Q[6]/CdS-Ag2S

Fig. 5 Photocatalytic degradation of Rhodamine B by Q[6]/CdS-Ag2S(a) and 15 mg different catalysts (b); UV-visible spectra varied with reaction time (c) and cyclic experiment (d) of Q[6]/CdS-Ag2S

Fig. 6 Effect of inhibitors EDTA (a), methanol (b) and isopropanol (c) on degradation Rhodamine B by Q[6]/CdS-Ag2S

Fig. 7 Mechanism diagram of photocatalysis of degradation of Rhodamine B by Q[6]/CdS-Ag2S

References 30

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Synthesis and Photocatalytic Properties of Cucurbit[6]uril/CdS-Ag₂S Composite Photocatalyst

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