Journal
CHINESE JOURNAL OF CATALYSIS
Volume 34, Issue 8, Pages 1551-1559Publisher
SCIENCE PRESS
DOI: 10.1016/S1872-2067(12)60612-3
Keywords
Nanomaterial; Gallium oxide; Perfluorooctanoic acid; Photocatalysis; Vacuum ultraviolet
Funding
- National Natural Science Foundation of China [21177071, 21221004]
- National Basic Research Program of China (973 Program) [2013CB632403]
Ask authors/readers for more resources
Nanostructured beta-Ga2O3 with a needle-like structure was synthesized by a polyvinyl alcohol (PVA)-assisted hydrothermal method and subsequent heat treatment. It has a high specific surface area (25.95 m(2)/g) and large number of nanopores (4-25 nm), and it exhibited good photocatalytic activity for perfluorooctanoic acid (PFOA) decomposition in pure water unde UV irradiation (lambda = 254 nm). PFOA had a half-life of 18.2 min, and the first order rate constant (2.28 h(-1)) for PFOA decomposition with the needle-like beta-Ga2O3 was 7.5 and 16.8 times higher, respectively, than with commercial Ga2O3 and TiO2 (P25). In addition, in combination with vacuum UV (VUV) irradiation (lambda = 185 nm), the needle-like beta-Ga2O3 showed high activity for the removal of trace PFOA in both pure water and wastewater, with first order rate constants of 4.03 and 3.51 h(-1), respectively. The adverse effect that coexisting natural organic matters in wastewater have on the decomposition of PFOA was mostly eliminated with VUV irradiation, and the energy consumption in this method was much less than the values reported for other methods in the literature. (C) 2013, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available