Characterization and Photocatalytic Activity of Microspheres ZnO by Hydrothermal Method

Abstract:

Using zinc acetate, glycerol alcohol and sodium hydroxide as principal raw materials, the ZnO microspheres were prepared by hydrothermal method at 200°C. The samples were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and diffuse reflectance spectroscopy (DRS). Using methyl orange as the degradation object, the photocatalytic activities and recycling stability of ZnO were characterized. The results show that ZnO samples are spherical and the average diameter is approximately 3-4μm. Moreover, the bandgap width is 3.1eV. Under ultraviolet light irradiation, it is testified that ZnO shows a excellent photocatalytic activity for the degradation of methyl orange. From experience, we can draw a conclusion that the ZnO samples were in line with first-order kinetics, with an apparent rate constant of 0.016min^-1. At the same time, ZnO showed excellent recycling performance. Although the samples have been recycled three times, it still maintained high photocatalytic activity.

• Periodical: Key Engineering Materials (Volume 814)
• Pages: 487-492
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.814.487
• Online since: July 2019
• Authors: Xi Hao Lin, Pei Song Tang*, Bei Bei Wang, Hai Qiang Tang
• Keywords: Hydrothermal Method, Microspheres, Photocatalysis, ZnO

References

[1] Y. A. Sumanth, R. A. Sujatha, S. Mahalakshmi, Synthesis and characterization of nanophase zinc oxide materials. J. Mater. Sci. Mater. Electron, 27(2016)1616-1621.

DOI: 10.1007/s10854-015-3932-0

[2] Y. Liu, Recent progress in ZnO-based heterojunction ultraviolet light-emitting devices. Chin. Sci. Bull, 59(2014)1219-1227.

DOI: 10.1007/s11434-014-0206-9

[3] K. Intarasuwan, P. Amornpitoksuk, S. Suwanboon, Effect of the mixing rate on the morphology and photocatalytic activity of ZnO powders prepared by a precipitation method. Adv. Powder Technol, 24(2013)999-1005.

DOI: 10.1016/j.apt.2013.02.001

[4] Y.G. Fan, Study on preparation and optical property of one-dimensional ZnO nanorod by sol-gel dip coating. New Chem. Mat, 46(2018) 189-192.

[5] E. López-Mena, S. Jiménez-Sandoval, O. Jiménez-Sandoval, ZnO thin films prepared at low annealing temperatures, from a novel, simple sol–gel precursor solution. J. Sol-Gel Sci. Technol, 74(2015)419-424.

DOI: 10.1007/s10971-014-3612-1

[6] Y. I. Choi, H. J. Jung, W. G. Shin, et al. Band gap-engineered ZnO and Ag/ZnO by ball-milling method and their photocatalytic and Fenton-like photocatalytic activities. Appl. Surf. Sci, 356(2015) 615-625.

DOI: 10.1016/j.apsusc.2015.08.118

[7] N. Sharma, S. Kumar, J. Kumar, Synthesis and structural properties of ZnO doped nanoparticles prepared by hydrothermal method. Integr. Ferroelectr., 186(2018)115-119.

DOI: 10.1080/10584587.2017.1370333

[8] J. Gao, S. Huang, P. Luo, et al. Photocatalytic properties of ZnO micromaterials prepared by hydrothermal method.Russ. J. Phys. Chem. A, 90(2016)2665-2667.

DOI: 10.1134/s0036024416130112

[9] B. Tatykayev, F. Donat, H. Alem, et al. Synthesis of core/shell ZnO/rGO nanoparticles by Ccalcination of ZIF-8/rGO composites and their photocatalytic activity. ACS Omega, 2(2017) 4946-4954.

DOI: 10.1021/acsomega.7b00673

[10] Y. Zhang, L. Song, Y. Zhang, et al. A facile method for synthesis of well-coated ZnO@graphene core/shell structure by self-assembly of amine-functionalized ZnO and graphene oxide. Chem. Phys. Lett, 2016, 654:107-113.

DOI: 10.1016/j.cplett.2016.05.023

[11] L. Yan, J. C. Liu, X. X. Lian, et al. Morphology, photoluminescence and gas sensing of Ce-doped ZnO microspheres. T. Nonferr.Metal.SOC,25(2015) 3657-3663.

DOI: 10.1016/s1003-6326(15)64006-7

[12] P. S. Tang, J. J. Zhang, M.B. Fu, et al. Characterization and preparation nanosized CeFeO3 by a microwave process. Integr. Ferroelectr., 146(2013)99-104.

[13] P. S. Tang, Y. Y. Hu, T.T. Lin, et al. Preparation of nanocrystalline GdFeO3 by microwave method and its visible-light photocatalytic activity. Integr. Ferroelectr., 153(2014)73-78.

DOI: 10.1080/10584587.2014.902720