Synthesis and Applications of ZnO Nanorods

氧化鋅奈米棒的成長與應用研究

鍾曜安(Yao-An Chung)

指導教授 ： 陳力俊

國立清華大學/工學院/材料科學工程學系/博士(2009年)

https://doi.org/10.6843/NTHU.2009.00398

摘要

Small-diameter ZnO nanorods have been prepared from aqueous
solution containing Zn(OH)4
2− ions, manganese acetate, and sodium
dodecyl sulfate in 3 h at room temperature. The added Mn2+ ions are
considered to lead to the formation of MnO2 nanoparticles, which serve
as the nucleation sites, to facilitate the growth of small diameter ZnO
nanorods. The as-prepared ZnO nanorods are single crystalline, 7–10
nm diameter and 200–300 nm in length. The high surface-to-volume
ratios determined by the Brunauer–Emmett–Teller method and the
surface oxygen deficiencies suggested by the cathodoluminescence
spectrum for the ZnO nanorods are conductive to the photocatalytic
activity. The photocatalytic activities on the conversion of nitride oxides
and degradation of methylene blue by ZnO nanorods were found to be
significantly enhanced by the presence of small-diameter ZnO nanorods.
Different sizes of ZnO nanorods were mixed with TiO2 nanoparticles
with a 1:99 ratio to prepare thin film for dye-sensitized solar cells. The
cell efficiency was measured and the optimal condition in our
experiments was found. The Voc and FF were found to increase with the
decrease of sizes of ZnO nanorods added. The capacitance and transient
photocurrent data show correlations to the tendency of short-circuit
current (Jsc). Thus, simulation model have been constructed to explain
this phenomenon. The contacts between TiO2 nanoparticles and ZnO
nanorods are crucial to the electrical properties. This calculation may
have potential in finding best sizes of ZnO nanowires and TiO2
nanoparticles in TiO2/ZnO nanoparticle/nanorod composite film for DSSC.

關鍵字

氧化鋅 ； 太陽能電池 ； 光催化

並列摘要

無資料

並列關鍵字

ZnO ； solar cell ； photocatalysis

參考文獻

Chapter 1

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