© The Institution of Engineering and Technology
The SnO2–Zn2SnO4–graphene composite photocatalysts were successfully prepared by a facile hydrothermal reaction method in an ethanol–water solvent. The as-prepared catalysts were characterised by techniques of X-ray diffraction, Raman spectroscopy, transmission electron microscopy and N2-sorption. The catalytic activity test results show that this SnO2–Zn2SnO4–graphene composite possesses higher photocatalytic degradation of rhodamine B (RhB) activity than that of pure SnO2–Zn2SnO4 under UV-light irradiation in an aqueous solution. The improved photocatalytic activity may be due to the increased adsorbability for the RhB molecule, more active sites, more photocatalytic reaction centres and the prevention of the photogenerated electron–hole pair recombination.
References
-
-
1)
-
1. Chen, X., Shen, S., Guo, L., Mao, S.S.: ‘Semiconductor-based photocatalytic hydrogen generation’, Chem. Rev., 2010, 110, pp. 6503–6570 (doi: 10.1021/cr1001645).
-
2)
-
9. Xue, T., Jiang, S., Qu, Y., et al: ‘Graphene-supported hemin as a highly active biomimetic oxidation catalyst’, Angew. Chem. Int. Ed., 2012, 51, pp. 3822–3825 (doi: 10.1002/anie.201108400).
-
3)
-
3. Zhang, M., An, T., Liu, X., et al: ‘Preparation of a high-activity ZnO/TiO2 photocatalyst via homogeneous hydrolysis method with low temperature crystallization’, Mater. Lett., 2010, 64, pp. 1883–1886 (doi: 10.1016/j.matlet.2010.05.054).
-
4)
-
14. Cao, J.L., Li, G.J., Wang, Y., et al: ‘Synthesis and characterization of hierarchical porous α-FeOOH for the adsorption and photodegradation of rhodamine B’, Int. J. Photoenergy, 2014, 2014 (doi: 10.1155/2014/468921).
-
5)
-
12. Zhang, Y., Zhang, N., Tang, Z.-R., Xu, Y.-J.: ‘Graphene transforms wide band gap ZnS to a visible light photocatalyst. The new role of graphene as a macromolecular photosensitizer’, ACS Nano, 2012, 6, pp. 9777–9789 (doi: 10.1021/nn304154s).
-
6)
-
8. Perera, S.D., Mariano, R.G., Vu, K., et al: ‘Hydrothermal synthesis of graphene–TiO2 nanotube composites with enhanced photocatalytic activity’, ACS Catal., 2012, 2, pp. 949–956 (doi: 10.1021/cs200621c).
-
7)
-
5. Uddin, M.T., Nicolas, Y., Olivier, C., et al: ‘Nanostructured SnO2–ZnO heterojunction photocatalysts showing enhanced photocatalytic activity for the degradation of organic dyes’, Inorg. Chem., 2012, 51, pp. 7764–7773 (doi: 10.1021/ic300794j).
-
8)
-
16. Seema, H., Kemp, K.C., Chandra, V., Kim, K.S.: ‘Graphene–SnO2 composites for highly efficient photocatalytic degradation of methylene blue under sunlight’, Nanotechnology, 2012, 23 (doi: 10.1088/0957-4484/23/35/355705).
-
9)
-
11. Xu, T., Zhang, L., Cheng, H., Zhu, Y.: ‘Significantly enhanced photocatalytic performance of ZnO via graphene hybridization and the mechanism study’, Appl. Catal. B, 2011, 101, pp. 382–387 (doi: 10.1016/j.apcatb.2010.10.007).
-
10)
-
10. Xiang, Q., Yu, J., Jaroniec, M., Park, J.: ‘Graphene-based semiconductor photocatalysts’, Chem. Soc. Rev., 2012, 41, pp. 782–796 (doi: 10.1039/C1CS15172J).
-
11)
-
6. Wang, G., Shen, X., Yao, J., Park, J.: ‘Graphene nanosheets for enhanced lithium storage in lithium ion batteries’, Carbon, 2009, 47, pp. 2049–2053 (doi: 10.1016/j.carbon.2009.03.053).
-
12)
-
2. Liu, R., Ye, H., Xiong, X., Liu, H.: ‘Fabrication of TiO2/ZnO composite nanofibers by electrospinning and their photocatalytic property’, Mater. Chem. Phys., 2010, 121, pp. 432–439 (doi: 10.1016/j.matchemphys.2010.02.002).
-
13)
-
13. Hummers, W.S., Offeman, R.E.: ‘Preparation of graphitic oxide’, J. Am. Chem. Soc., 1958, 80, pp. 1339–1339 (doi: 10.1021/ja01539a017).
-
14)
-
2. Yoon, H.J., Jun, D.H., Yang, J.H.et al.: ‘Carbon dioxide gas sensor using a graphene sheet’, Sens. Actuators B, Chem., 2011, 157, (1), pp. 310–313 (doi: 10.1016/j.snb.2011.03.035).
-
15)
-
4. Pan, J., Hühne, S.-M., Shen, H., et al: ‘SnO2–TiO2 core-shell nanowire structures: investigations on solid state reactivity and photocatalytic behavior’, J. Phys. Chem. C, 2011, 115, pp. 17265–17269 (doi: 10.1021/jp201901b).
-
16)
-
15. Rao, R., Podila, R., Tsuchikawa, R., et al: ‘Effects of layer stacking on the combination Raman modes in graphene’, ACS Nano, 2011, 5, pp. 1594–1599 (doi: 10.1021/nn1031017).
http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2015.0114
Related content
content/journals/10.1049/mnl.2015.0114
pub_keyword,iet_inspecKeyword,pub_concept
6
6