Photocatalytic degradation of 2,4-dichlorophenol over Fe-ZnO catalyst under visible light
Fe-ZnO was synthesized via impregnation and applied to photocatalytic degradation of 2,4-dichlorophenol (2,4-DCP) under visible light. Conditions of Fe-ZnO synthesis which included a Fe content and a calcination temperature were focused. From UV-DRS, visible light absorption of Fe-ZnO samples increa...
Saved in:
Published in | The Korean journal of chemical engineering Vol. 32; no. 8; pp. 1578 - 1585 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.08.2015
한국화학공학회 |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Fe-ZnO was synthesized via impregnation and applied to photocatalytic degradation of 2,4-dichlorophenol (2,4-DCP) under visible light. Conditions of Fe-ZnO synthesis which included a Fe content and a calcination temperature were focused. From UV-DRS, visible light absorption of Fe-ZnO samples increased with increasing of Fe content and calcination temperature. TEM images revealed Fe species (FeO, Fe
3
O
4
, and Fe
2
O
3
) on ZnO as a function of calcination temperature. XANES analysis confirmed the majority of Fe
3+
content. Response surface methodology (RSM) dominating over experimental design and statistical analysis for 2,4-DCP photocatalytic degradation indicated that the high degradation efficiency was associated with calcination temperature of 680–700 °C, Fe content of 4.5–5.0 mol%, and catalyst loading of 1.2–1.8 g L
−1
. Moreover, addition of 2mM of K
2
S
2
O
8
in a 5.0Fe-ZnO@700 °C system could enhance the degradation efficiency to a completion within 90 min. The kinetics of 2,4-DCP photocatalytic degradation well fit the Langmuir-Hinshelwood model. |
---|---|
Bibliography: | G704-000406.2015.32.8.010 |
ISSN: | 0256-1115 1975-7220 |
DOI: | 10.1007/s11814-014-0379-6 |