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Enhanced photocatalytic degradation of 2-propanol over macroporous GaN/ZnO solid solution prepared by a novel sol-gel method
1.D. Wang, A. Pierre, M. G. Kibria, K. Cui, X. Han, K. H. Bevan, H. Guo, S. Paradis, A.-R. Hakima, and Z. Mi, Nano Lett. 11, 2353 (2011).
17.F.-K. Shieh, C.-T. Hsiao, H.-M. Kao, Y.-C. Sue, K.-W. Lin, C.-C. Wu, X.-H. Chen, L. Wan, M.-H. Hsu, J. Hwu, C.-K. Tsung, and K. C. W. Wu, RSC Adv. 3, 25686 (2013).
See supplementary material at http://dx.doi.org/10.1063/1.4928702
for detailed syntheses of particulate and mesoporous GaN/ZnO solid solutions; XRD patterns, UV–vis diffuse reflectance spectra, and IPA photodegradation activities of particulate, macroporous, and mesoporous GaN/ZnO solid solutions; nitrogen absorption–desorption isotherms, and TEM images of macroporous and mesoporous GaN/ZnO solid solutions.[Supplementary Material]
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Macroporous GaN/ZnO solid solution photocatalyst is synthesized through a novel sol-gel method under mild conditions. The performance of as-synthesized solid solution photocatalyst is evaluated for decomposition of gaseous 2-propanol (IPA). It is found that due to enhancement in both the adsorption to gaseous IPA and the absorbance to visible light, the porous GaN/ZnO solid solution exhibits a good photocatalytic performance for IPA decomposition. Moreover, the mechanism for photocatalytic degradation IPA over porous GaN/ZnO solid solution is also investigated in comparison with those for the two end materials ZnO and GaN. The trapping effects with different scavengers prove that both the photoexcited electrons and holes affect the IPA photodegradation process, simultaneously.
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