Paper Title:
Synthesis and Gas Sensing Properties of Urchin-Like CuO Self-Assembled by Nanorods through a Poly(ethylene glycol)-Assisted Hydrothermal Process
  Abstract

Urchin-like CuO, consisting of closely packed nanorods with a diameter of 10nm, have been successfully synthesized by a poly(ethylene glycol) (PEG)-assisted hydrothermal route at low temperature of 100°C. The as-obtained Urchin-like CuO were thoroughly characterized by X-ray diffraction (XRD) study, Field emission scanning electron microscope (FESEM), High-resolution transmission electron microscopy (HRTEM) and Gas sensor measurements. From the XRD pattern, all the peaks detected can be assigned to CuO in a monoclinic structure with lattice parameters a=4.662, b=3.416 and c=5.118 (JCPDS card no. 65-2309). The FESEM and TEM showed that the diameter of the urchin-like CuO sphere is about 1µm. Further investigation of the formation mechanism reveals that the PEG-assisted hydrothermal process is vital to the formation of 3D structures. Besides the template function, PEG often plays as a reductant while reacting with Cu(+2). In our case, no impurity peaks of Cu2O were observed in the XRD pattern, implying that PEG did not reduce Cu(+2) to Cu(+1). We attribute this to the high concentration of PEG. The sensor based on the urchin-like CuO nanostructures exhibit excellent ethanol-sensing properties at reduced working temperature (200°C), which shows a sensitivity two times higher than that of CuO particles(about 100nm, made from calcinations of Cu(NO3)2 at 400°C). The enhancement in sensitivity of the as-prepared CuO may be contributed to the fancy 3D nanostructures.

  Info
Periodical
Advanced Materials Research (Volumes 79-82)
Edited by
Yansheng Yin and Xin Wang
Pages
1059-1062
DOI
10.4028/www.scientific.net/AMR.79-82.1059
Citation
J. Y. Li, B. J. Xi, J. Pan, Y. T. Qian, "Synthesis and Gas Sensing Properties of Urchin-Like CuO Self-Assembled by Nanorods through a Poly(ethylene glycol)-Assisted Hydrothermal Process", Advanced Materials Research, Vols. 79-82, pp. 1059-1062, 2009
Online since
August 2009
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yan Li, Yun Ling Zou, Jian Gang Li
Abstract:ZnO is an important functional semiconductor in application of photoelectric devices. ZnO nano-tubes and the CuO-doped ZnO have been...
847
Authors: Bing Bing Wang, Qing Shan Kong, Jian Ping Sun, Quan Feng Yu, Quan Ji, Yan Zhi Xia
Abstract:Schistose and aciculate CuO nanostructures have been synthesized by a novel ammonia assisted hydrothermal method of copper alginate. The...
19
Authors: Sopa Noontasa, Vatcharinkorn Mekla, Sert Kiennork
Chapter 11: Micro/Nano Materials and Preparation Technology
Abstract:In this work optical properties of CuO nanostructure were studied. CuO nanostructure were synthesized by the hydrothermal treatment method....
2258
Authors: Pitchanunt Chaiyo, Ladarat Kanlayavisut, Rinnatha Vongwatthaporn, Bok Ki Min, Seong Jun Kim, Ki Seok An, Supon Sumran, Supakorn Pukird
Abstract:MoO3 microfilms and nanorods can be synthesized by using the powder of MoS2 as starting materials by thermal chemical...
23
Authors: Hong Cai, Qing Bo Du, Ji Gui Xu, Hong Wei Shi, Jun Zhu
Chapter 2: Nano and Inorganic Functional Materials
Abstract:a-Fe2O3 nanorods over large areas were successfully synthesized by hydrothermal method, using FeCl3 as iron...
346