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 06.03.2011   Карта сайта     Language По-русски По-английски
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06.03.2011

Preparation of porous flower-like ZnO nanostructures and their gas-sensing property

Cuiping Gua, Jiarui Huanga, b, Corresponding Author Contact Information, E-mail The Corresponding Author, Youjie Wua, Muheng Zhaia, Yufeng Sunc and Jinhuai Liub





a College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Normal University, Wuhu 241000, PR China


b Key Lab Biomimet Sensing & Adv Robot Technol, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China


c Mechanical Engineering Department, Anhui University of Technology and Science, Wuhu 241000, PR China




Received 17 July 2010; 


revised 6 November 2010; 


accepted 11 November 2010. 


Available online 19 November 2010.











Abstract



Porous flower-like ZnO nanostructures have been synthesized by a template-free, economical hydrothermal method combined with subsequent calcination. Calcination of the precursors produced flower-like ZnO nanostructures, composed of interconnected porous ZnO nanosheets with high porosity resulting from the thermal decomposition of the as-prepared precursors, i.e., flower-like basic zinc carbonate (BZC). Moreover, the nanostructures have been characterized through X-ray diffraction, thermogravimetric-differential thermalgravimetric analysis, scanning electron microscopy, transmission electron microscopy, and Brunauer–Emmett–Teller N2 adsorption–desorption analyses. Compared with ZnO nanorods, the as-prepared porous flower-like ZnO nanostructures exhibit a good response and reversibility to some organic gas, such as ethanol and acetone. The sensor responses to 100 ppm ethanol and acetone are 21.8 and 16.8, respectively, at a working temperature of 320 °C. In addition, the sensors also exhibited a good response to 2-propanol and methanol, which indicate that these porous flower-like ZnO nanostructures are highly promising for applications of gas sensors.











Research highlights



right triangle, filled Flower-like basic zinc carbonate was prepared by template-free hydrothermal method. right triangle, filled Porous flower-like ZnO nanostructures were obtained by annealing the precursors. right triangle, filled The porous flower-like ZnO nanostructures exhibit excellent sensing performances. right triangle, filled High porosity and 3D morphology structures promote its sensing performances.





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А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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