Synthesis of CdS/m-TiO₂ mesoporous spheres and their application in photocatalytic degradation of rhodamine B under visible light

Abstract

CdS/m-TiO₂ heteroarchitecture with CdS nanocrystals loaded on mesoporous TiO₂(m-TiO₂) spheres was successfully synthesized via sol-gel method followed by solvothermal treatment. The material with uniform diameter of ca. 750 nm possesses regular mesoporous structure and large specific surface area of 100.5 m²/g. When used to photodegradate Rhodamine B(RB) under visible light, the CdS/m-TiO₂ heteroarchitecture exhibits improved photocatalytic performance in comparison with pure m-TiO₂ or CdS. The excellent photocatalytic activity is closely related to the facilitated separation of electron-hole pairs derived from the CdS/m-TiO₂ heterojunction and mesoporous structure with high specific surface area and adequately exposed active sites.

Keywords

Cadmium sulfide / Titanium dioxide / Heteroarchitecture / Mesoporous material / Photocatalysis / Visible light

References

[1] Hoffmann M. R., Martin S. T., Choi W., Bahnemannt D. W. Chem. Rev., 1995, 95: 69.

[2] Wang M. Y., Ioccozia J., Sun L., Lin C. J., Lin Z. Q. Energy Environ. Sci., 2014, 7: 2182.

[3] Chen X. B., Mao S. S. Chem. Rev., 2007, 107: 2891.

[4] Hernández-Alonso M. D., Fresno F., Suárez S., Coronado J. M. Energy Environ. Sci., 2009, 2: 1231.

[5] Kudo A., Miseki Y. Chem. Soc. Rev., 2009, 38: 253.

[6] Tachikawa T., Fujitsuka M., Majima T. J. Phys. Chem. C, 2007, 111: 5259.

[7] Cui L. F., Huang F., Niu M. T., Zeng L. W., Xu J., Wang Y. S. J. Mol. Catal. A: Chem., 2010, 326: 1.

[8] Guan H. Y., Wang X. H., Guo Y. H., Shao C. l., Zhang X. T., Liu Y. C., Louh R. F. Appl. Surf. Sci., 2013, 280: 720.

[9] Wang X. H., Li X. T. Chem.J.Chinese Universities, 2015, 36(5): 976.

[10] Cao Y. Q., He T., Chen Y. M., Cao Y. A. J. Phys. Chem. C, 2010, 114: 3627.

[11] Bhirud A. P., Sathaye S. D., Waichal R. P., Ambekar J. D., Park C. J., Kale B. B. Nanoscale, 2015, 7: 5023.

[12] Wang J. Y., Liu Z. H., Zheng Q., He Z. K., Cai R. X. Nanotechnolo-gy, 2006, 17: 4561.

[13] Xie Y., Ali G., Yoo S. H., Cho S. O. ACS Appl. Mater. Interfaces, 2010, 2: 2910.

[14] Ismail A. A. Appl. Catal., B, 2012, 117/118: 67.

[15] Li L., Cheng B., Wang Y., Yu J. J. Colloid Interface Sci., 2015, 449: 115.

[16] Bi F., Ehsan M. F., Liu W., He T. Chin. J. Chem., 2015, 33: 112.

[17] Hayden S. C., Allam N. K., El-Sayed M. A. J. Am. Chem. Soc., 2010, 132: 14406.

[18] Bai S. L., Li H. Y., Guan Y. Y., Jiang S. T. Appl. Surf. Sci., 2011, 257: 6406.

[19] Su C., Shao C., Liu Y. J. Colloid Interface Sci., 2011, 359: 220.

[20] Serpone N., Borgarello E., Gratzel M. J. Chem. Soc., Chem. Com-mun., 1984, 342.

[21] Jang J. S., Li W., Oh S. H., Lee J. S. Chem. Phys. Lett., 2006, 425: 278.

[22] Zhu Y. X., Wang Y. F., Chen Z., Qin L. S., Yang L. B., Zhu L., Tang P., Gao T., Huang Y. X., Sha Z. L., Tang G. Appl. Catal., A, 2015, 498: 159.

[23] Dong W. H., Pan F., Xu L. L., Zheng M. R., Sow C. H., Wu K., Xu G. Q., Chen W. Appl. Surf. Sci., 2015, 349: 279.

[24] Xue C., Wang T., Yang G. D., Yang B. L., Ding S. J. J. Mater. Chem. A, 2014, 2: 7674.

[25] Bessekhouad Y., Robert D., Weber J. V. J. Photochem. Photobiol., A, 2004, 163: 569.

[26] Wu J. M., Zhang T. W. J. Photochem. Photobiol., A, 2004, 162: 171.

[27] Lee M. S., Park S. S., Lee G. D., Ju C. S., Hong S. S. Catal. Today, 2005, 101: 283.

[28] Lubomir S., Markus H., Horst W., Arnim H. J. Am. Chem. Soc., 1987, 109: 5649.