Surfactant-free hydrothermal synthesis and sensitivity characterization of Pd-doped SnO2 nanocrystals on multiwalled carbon nanotubes

Ruiqin Tan; Yanqun Guo; Wenfeng Shen; Kemin Jiang; Tiefeng Xu; Weijie Song

doi:10.1117/12.923814

12 April 2012 Surfactant-free hydrothermal synthesis and sensitivity characterization of Pd-doped SnO₂ nanocrystals on multiwalled carbon nanotubes

Ruiqin Tan, Yanqun Guo, Wenfeng Shen, Kemin Jiang, Tiefeng Xu, Weijie Song

Author Affiliations +

Proceedings Volume 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering; 84091K (2012) https://doi.org/10.1117/12.923814
Event: Third International Conference on Smart Materials and Nanotechnology in Engineering, 2011, Shenzhen, China

Abstract

In the present study, a simple approach has been presented to in situ deposition of Pd-doped well-crystallized SnO₂ nanocrystals on the surface of multiwalled carbon nanotubes (MWCNTs) in the ethanol solution of SnCl₂. The morphology, microstructure and surface chemistry of the as-prepared nanocomposites were characterized by high resolution transmission electron microscope (HRTEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The HRTEM and XRD results show that the well-crystallized SnO₂ nanocrystals with uniform crystal size (about 5 nm) tightly and homogenously coat on the entire surface of the MWCNTs. The carboxylic function groups on the MWCNTs surface may supply nucleation sites for facilitating the in situ deposition of SnO₂ nanocrystals. The XPS results reveal that the chemical states of the nanocomposites and the dopant of Pd mainly exists in two chemical states as Pd²⁺ and Pd⁴⁺. The response of the 2.5 at% Pd-doped SnO₂/MWCNTs nanocomposites to 1000 ppm NO at the temperature of 250 °C behaviors better, whose response time is about 70 s and the sensitivity is about 4.62.

Citation Download Citation

Ruiqin Tan, Yanqun Guo, Wenfeng Shen, Kemin Jiang, Tiefeng Xu, and Weijie Song "Surfactant-free hydrothermal synthesis and sensitivity characterization of Pd-doped SnO₂ nanocrystals on multiwalled carbon nanotubes", Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84091K (12 April 2012); https://doi.org/10.1117/12.923814

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available