Photocatalytic degradation of Reactive Black 5 and Malachite Green with ZnO and lanthanum doped nanoparticles

Content Provider	Semantic Scholar
Author	Kaneva, N. V. Bojinova, Assya Papazova, Karolina
Copyright Year	2016
Abstract	Here we report the preparation of ZnO particles with different concentrations of La3+ doping (0, 0.5 and 1 wt%) via sol-gel method. The nanoparticles are synthesized directly from Zn(CH3COO)2.2H2O in the presence of 1-propanol and triethylamine at 80°C. The conditions are optimized to obtain particles of uniform size, easy to isolate and purify. The nanoparticles are characterized by SEM, XRD and UV-Vis analysis. The photocatalytic properties of pure and La-doped ZnO are studied in the photobleaching of Malachite Green (MG) and Reactive Black 5 (RB5) dyes in aqueous solutions upon UV illumination. It is observed that the rate constant increases with the La loading up to 1 wt%. The doping helps to achieve complete mineralization of MG within a short irradiation time. 1 wt% La-doped ZnO nanoparticles show highest photocatalytic activity. The La3+ doped ZnO particles degrade faster RB5 than MG. The reason is weaker N=N bond in comparison with the C-C bond between the central carbon atom and N,N-dimethylaminobenzyl in MG. The as-prepared ZnO particles can find practical application in photocatalytic purification of textile wastewaters.
Starting Page	012022
Ending Page	012022
Page Count	1
File Format	PDF HTM / HTML
DOI	10.1088/1742-6596/682/1/012022
Volume Number	682
Alternate Webpage(s)	http://iopscience.iop.org/article/10.1088/1742-6596/682/1/012022/pdf
Alternate Webpage(s)	https://doi.org/10.1088/1742-6596%2F682%2F1%2F012022
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article