Controllable synthesis of TiO2/ATO conductive composite: effects of TiO2 surface properties
- Author(s): Xue Li 1 ; Jianhua Qian 1, 2 ; Ke Tang 2 ; Jiasheng Xu 2
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View affiliations
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Affiliations:
1:
Institute of Materials Physics and Chemistry, School of Material Science and Engineering, Northeastern University , Shenyang 110004, Liaoning , People's Republic of China ;
2: Provincial Key Laboratory for Functional Compounds Synthesis and Application, Bohai University , Jinzhou 121013, Liaoning , People's Republic of China
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Affiliations:
1:
Institute of Materials Physics and Chemistry, School of Material Science and Engineering, Northeastern University , Shenyang 110004, Liaoning , People's Republic of China ;
- Source:
Volume 13, Issue 6,
June
2018,
p.
807 – 810
DOI: 10.1049/mnl.2018.0020 , Online ISSN 1750-0443
The effect of the TiO2 surface property on the conductivity of TiO2/antimony-doped tin oxide (ATO) has been revealed by the substrate modification with SiO2 and ZrO2. Their morphology, structural, and electric characteristics were investigated through field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and electrochemical impedance spectra. The surface character of the raw and modified TiO2 particles in water was investigated. The results indicated that the negatively charged substrate (−29.7 mV) was formed through the incorporation of SiO2 coating, which facilitated the uniform deposition of positively charged ATO precursors further significantly improved the conductivity of TiO2/ATO composite. Conversely, the conductivity of TiO2/ZrO2–ATO composite decreased due to the increase of electrostatic repulsion from the positively charged surface (+55.3 mV) of the substrate. The results confirmed the feasibility of the method proposed in this work.
Inspec keywords: antimony; wide band gap semiconductors; silicon compounds; tin compounds; surface morphology; titanium compounds; transmission electron microscopy; materials preparation; field emission scanning electron microscopy; composite materials; zirconium compounds; electrical conductivity; X-ray diffraction; electrochemical impedance spectroscopy; X-ray photoelectron spectra; coatings
Other keywords: X-ray diffraction; transmission electron microscopy; field emission scanning electron microscopy; substrate modihcation; electrostatic repulsion; X-ray photoelectron spectroscopy; controllable synthesis; structural characteristics; surface morphology; antimony-doped tin oxide; electric characteristics; positively charged surface; electrochemical impedance spectra; conductive composite; coating; electrical conductivity; negatively charged substrate; TiO2-ZrO2-SnO2:Sb; positively charged precursors; surface properties; TiO2-SiO2-SnO2:Sb
Subjects: Other methods of preparation of materials; Electrochemistry and electrophoresis; Electrochemical analytical methods; Solid surface structure; Electrical conductivity of composite materials; Electron spectroscopy for chemical analysis (photoelectron, Auger spectroscopy, etc.); Photoelectron spectra of composite surfaces
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