CuxO - TiO2 Composites (x = 1, 2) Studied by X-ray Photoelectron Spectroscopy

被引：18

作者：

Barreca, Davide ^{[1
,2
]}

Carraro, Giorgio ^{[3
,4
]}

Gasparotto, Alberto ^{[3
,4
]}

机构：

[1] Padova Univ, CNR ISTM, I-35131 Padua, Italy

[2] Padova Univ, INSTM, Dept Chem, I-35131 Padua, Italy

[3] Padova Univ, Via Marzolo 1, I-35131 Padua, Italy

[4] INSTM, Dept Chem, I-35131 Padua, Italy

来源：

SURFACE SCIENCE SPECTRA | 2009年 / 16卷 / 01期

关键词：

copper oxides; titanium dioxide; nanocomposites; CVD; x-ray photoelectron spectroscopy;

D O I：

10.1116/11.20110101

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

CuxO - TiO2 (x-1. 2) nanocomposites were synthesized by an innovative Chemical Vapor Deposition (CVD) strategy, based on the initial growth of CuxO matrices (1) and on the subsequent dispersion of TiO, nanoparticles (2). Cu(hfa),"TMEDA (hfa-1,1,1,5,5,5-hexafluoro2,4-pentanedionate; TMEDA N,N,N',N'-tetrainethylethylenediamine) and Ti(O-iPr)(2)(dpin), (0-iPr isopropoxide; dpm-2,2,6,6-tetramethy1-3,5-heptanedionate) were used as copper and titanium molecular sources, respectively. The syntheses were carried out under 0, 11-120 atmospheres on Si(100) substrates. In step (1), pure and homogeneous single-phase Cu2O/CuO nanosystems were obtained at 400/550 degrees C, with total pressures of 3.0/10.0 mbar, respectively. Interestingly, the obtained nanocomposites were characterized by the surface formation of Cu(I)-Cu(II) mixtures, due to the occurrence of interactions between CuxO and TiO,. This work is dedicated to the characterization of two representative samples by X-ray Photoelectron Spectroscopy (XPS), focusing in particular on the analysis on the 0 Is, Cu 2p and Ti 2p core levels. (C) 2009 American Vacuum Society.

引用

页码：1 / 12

页数：12

共 43 条

[1] A sol-gel approach to nanophasic copper oxide thin films [J].

Armelao, L ;

Barreca, D ;

Bertapelle, M ;

Bottaro, G ;

Sada, C ;

Tondello, E .

THIN SOLID FILMS, 2003, 442 (1-2) :48-52

[2]

Baer D. R., 1998, Surface Science Spectra, V5, P193, DOI 10.1116/1.1247839

[3] Highly stable CuO incorporated TiO2 catalyst for photocatalytic hydrogen production from H2O [J].

Bandara, J ;

Udawatta, CPK ;

Rajapakse, CSK .

PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 2005, 4 (11) :857-861

[4] CVD of lanthanum oxyfluoride-based thin films from a lanthanum β-diketonate diglyme precursor [J].

Barreca, D ;

Gasparotto, A ;

Maragno, C ;

Tondello, E ;

Bontempi, E ;

Depero, LE ;

Sada, C .

CHEMICAL VAPOR DEPOSITION, 2005, 11 (10) :426-432

[5] CVD of nanophasic (Zn,Cd)S thin films: From multi-layers to solid solutions [J].

Barreca, D ;

Gasparotto, A ;

Maragno, C ;

Tondello, E ;

Sada, C .

CHEMICAL VAPOR DEPOSITION, 2004, 10 (04) :229-236

[6] TiO2 Thin Films by Chemical Vapor Deposition: An XPS Characterization [J].

Barreca, Davide ;

Gasparotto, Alberto ;

Maccato, Chiara ;

Maragno, Cinzia ;

Tondello, Eugenio .

SURFACE SCIENCE SPECTRA, 2007, 14 (01) :27-33

[7] CVD Cu2O and CuO Nanosystems Characterized by XPS [J].

Barreca, Davide ;

Gasparotto, Alberto ;

Tondello, Eugenio .

SURFACE SCIENCE SPECTRA, 2007, 14 (01) :41-51

[8] CVD of Copper Oxides from a β-Diketonate Diamine Precursor: Tailoring the Nano-Organization [J].

Barreca, Davide ;

Gasparotto, Alberto ;

Maccato, Chiara ;

Tondello, Eugenio ;

Lebedev, Oleg I. ;

Van Tendeloo, Gustaaf .

CRYSTAL GROWTH & DESIGN, 2009, 9 (05) :2470-2480

[9] Nanostructured Cu2O thin film electrodes prepared by electrodeposition for rechargeable lithium batteries [J].

Bijani, S. ;

Gabas, M. ;

Martinez, L. ;

Ramos-Barrado, J. R. ;

Morales, J. ;

Sanchez, L. .

THIN SOLID FILMS, 2007, 515 (13) :5505-5511

[10]

Briggs D., 1990, PRACTICAL SURFACE AN, V2nd

← 1 2 3 4 5 →