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- [1] p-type behavior in Na-doped ZnO films and ZnO homojunction light-emitting diodesSOLID STATE COMMUNICATIONS, 2008, 148 (1-2) : 25 - 28Lin, S. S.Lu, J. G.Ye, Z. Z.He, H. P.Gu, X. Q.Chen, L. X.Huang, J. Y.Zhao, B. H.
Visible-light-sensitive Na-doped p-type flower-like ZnO photocatalysts synthesized via a continuous flow microreactor
被引：47
|作者：
Kim, Ki-Joong
[1
]
Kreider, Peter B.
[1
]
Choi, Changho
[1
]
Chang, Chih-Hung
[1
]
Ahn, Ho-Geun
[2
]
机构：
[1] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA
[2] Sunchon Natl Univ, Dept Chem Engn, Sunchon 540742, Jeonnam, South Korea
来源：
基金：
美国国家科学基金会;
关键词：
THIN-FILM;
GREEN LUMINESCENCE;
OPTICAL-PROPERTIES;
PHOTOLUMINESCENCE;
NANOSTRUCTURES;
NANOWIRES;
HOMOJUNCTION;
NANOCRYSTALS;
MECHANISM;
GROWTH;
D O I：
10.1039/c3ra41866a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A Na-doped p-type flower-like ZnO photocatalyst (Na:ZnO) that is highly visible-light-sensitive in air at room temperature was synthesized by a continuous flow microreactor, where NaOH was used as both the precipitating and doping agent. The results of various characterization techniques (XPS, ICP, ToF-SIMS, XRD, and HRTEM) indicated that the Na ions have been successfully doped into the ZnO lattice. The Na: ZnO demonstrated a much higher photocatalytic degradation rate of methylene blue under simulated sunlight (lambda(max) = 494 nm) than the rates obtained from commercially available TiO2 photocatalysts (P-25) and pure ZnO. This much enhanced rate is likely a result of increased surface defect sites associated with oxygen when Na replaces Zn in the crystal structure. A possible mechanism of the photocatalytic degradation of methylene blue on the Na: ZnO is suggested.
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页码：12702 / 12710
页数：9
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