Vertically oriented CuO/ZnO nanorod arrays: from plasma-assisted synthesis to photocatalytic H2 production

被引:107
作者
Simon, Quentin
Barreca, Davide [1 ,2 ]
Gasparotto, Alberto
Maccato, Chiara
Montini, Tiziano [3 ,4 ]
Gombac, Valentina [3 ,4 ]
Fornasiero, Paolo [3 ,4 ]
Lebedev, Oleg I. [5 ]
Turner, Stuart [6 ]
Van Tendeloo, Gustaaf [6 ]
机构
[1] Univ Padua, CNR ISTM, I-35131 Padua, Italy
[2] Univ Padua, Dept Chem, INSTM, I-35131 Padua, Italy
[3] Univ Trieste, Dept Chem & Pharmaceut Sci, INSTM, I-34127 Trieste, Italy
[4] ICCOM CNR Trieste Res Unit, I-34127 Trieste, Italy
[5] CNRS ENSICAEN, UMR 6508, Lab CRISMAT, F-14050 Caen 4, France
[6] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium
关键词
CHEMICAL-VAPOR-DEPOSITION; ZINC-OXIDE NANORODS; EMERGING TECHNOLOGIES; HYDROGEN GENERATION; FIELD-EMISSION; ZNO; GROWTH; TIO2; NANOSYSTEMS; NANOSTRUCTURES;
D O I
10.1039/c2jm31589k
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
1D CuO/ZnO nanocomposites were grown on Si(100) substrates by means of an original two-step synthetic strategy. ZnO nanorod (NR) arrays were initially deposited by plasma enhanced-chemical vapor deposition (PE-CVD) from an Ar-O-2 atmosphere. Subsequently, tailored amounts of CuO were dispersed over zinc oxide matrices by radio frequency (RF)-sputtering of Cu from Ar plasmas, followed by thermal treatment in air. A thorough characterization of the obtained systems was carried out by X-ray photoelectron and X-ray excited-Auger electron spectroscopies (XPS and XE-AES), glancing incidence X-ray diffraction (GIXRD), field emission-scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDXS), atomic force microscopy (AFM), transmission electron microscopy (TEM), electron diffraction (ED) and energy filtered-TEM (EF-TEM). Pure and highly oriented CuO/ZnO NR arrays, free from ternary Zn-Cu-O phases and characterized by a copper(II) oxide content controllable as a function of the adopted RF-power, were successfully obtained. Interestingly, the structural relationships between the two oxides at the CuO/ZnO interface were found to depend on the overall CuO loading. The obtained nanocomposites displayed promising photocatalytic performances in H-2 production by reforming of ethanol-water solutions under simulated solar illumination, paving the way to the sustainable conversion of solar light into chemical energy.
引用
收藏
页码:11739 / 11747
页数:9
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