共 91 条
Novel nanomagnetic Ag/β-Ag2WO4/CoFe2O4 as a highly efficient photocatalyst under visible light irradiation
被引:38
作者:

Ghobadifard, Mandieh
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机构:
Univ Kurdistan, Dept Chem, POB 66179-415, Sanandaj, Iran Univ Kurdistan, Dept Chem, POB 66179-415, Sanandaj, Iran

Mohebbi, Sajjad
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h-index: 0
机构:
Univ Kurdistan, Dept Chem, POB 66179-415, Sanandaj, Iran Univ Kurdistan, Dept Chem, POB 66179-415, Sanandaj, Iran
机构:
[1] Univ Kurdistan, Dept Chem, POB 66179-415, Sanandaj, Iran
关键词:
Z-SCHEME PHOTOCATALYST;
ENHANCED PHOTODEGRADATION;
FACILE SYNTHESIS;
NANOCOMPOSITES;
DEGRADATION;
COMPOSITE;
COFE2O4;
PERFORMANCE;
NANORODS;
NANOSHEETS;
D O I:
10.1039/c8nj00834e
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
A visible light-driven magnetic Ag/-Ag2WO4/CoFe2O4 nanophotocatalyst is successfully prepared using a facial method and characterized via FT-IR, XRD, SEM, EDS, VSM, DRS, BET, TEM, XPS and PL analysis. The obtained CoFe2O4 nanoparticles and Ag/-Ag2WO4/CoFe2O4 nanocomposite exhibit a flower-like morphology and average diameter of 35 and 43 nm, respectively. The Ag/-Ag2WO4/CoFe2O4 nanocomposite exhibits a two-fold enhancement in photocatalytic activity toward the oxidation of primary alcohols under visible light irradiation compared to that of CoFe2O4 and Ag/-Ag2WO4. The photocatalytic efficiency of the CoFe2O4 and Ag/-Ag2WO4 nanoparticles is 43% and 51%, respectively, whereas for Ag/-Ag2WO4/CoFe2O4 it is 85%. This enhancement in photocatalytic activity is attributed to the effective separation of electron-hole pairs. The trapping experiment shows that OH and h(+) are the main species involved in the photocatalytic activity of the Ag/-Ag2WO4/CoFe2O4 nanocomposite system. This robust and high-performance magnetic photocatalyst is recovered easily with a permanent magnet and can be reused five times without significant changes in its efficiency. Also, a radical chain mechanism is proposed.
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页码:9530 / 9542
页数:13
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