Dissertation > Excellent graduate degree dissertation topics show

Controlled Preparation and Characteristic of SnO2 One-Dimensional Nanostructures

Author: ZengChunLai
Tutor: TangDongSheng
School: Hunan Normal University
Course: Condensed Matter Physics
Keywords: Tin dioxide One-dimensional nanomaterials Chemical vapor deposition method Doping
CLC: O472
Type: Master's thesis
Year: 2007
Downloads: 157
Quote: 0
Read: Download Dissertation


SnO 2 is a typical semiconductor-type metal oxides, the band gap of 3.6eV (300K). SnO 2 one-dimensional materials with special physical properties , and has a wide range of applications in optoelectronic devices , gas sensors, transparent electrodes , solar cells and other fields , so that it attracted much attention . Improved one-dimensional nanomaterials preparation method to obtain a discrete good , with a specific micro - structure of SnO 2 current research focus is becoming a one-dimensional structure system . In this paper, the chemical vapor deposition method by controlling the reactant ratio and the oxygen content in the carrier gas macroscopic experimental conditions , SnO 2 control the growth of one-dimensional nanostructures , successful SnO 2 various horizontal scale nanowires , nanobelts , and needle-like nanostructures . Experimental results show that : SnO 2 followed in the one-dimensional structure of the growth process , the growth mechanism may be closely related to the relative content of the growing point near the tin with oxygen , regulate the relatively high temperature growth point the nearby tin and oxygen content can precisely control SnO 2 growth of one-dimensional nanostructures . By changing the air pressure and substrate position of the growth of the region , the success of the most vertical substrate growth the SnO 2 micro- nano- cluster and tree spiny , test tube brush -like SnO 2 self - assembling micro and nano structures , and shallow skip analysis of the mechanism of the growth of these structures and possible causes . Substrate at a high vapor concentration is prepared by the self - assembled structure of the key . Tin dioxide has excellent gas sensing characteristics important applications in the field of gas sensors . In order to further improve the selectivity and sensitivity of gas to improve the stability of their work , while its operating temperature down to room temperature within SnO 2 -dimensional nanostructures doped molybdenum try and get the initial success . Through contrast the doped molybdenum experiments under two different conditions , the use of chemical vapor deposition prepared by melting point metal doped SnO structure conditions were discussed .

Related Dissertations

  1. Preparation and Photocatalytic Properties for Water Decomposition of Titanate Photocatalyst,O643.36
  2. The Study of Preparation and Photocatalytic Activity of TiO2 by Electrospinning,O614.411
  3. Study and Preparation of BaTiO3-based NTC Ceramic Thermistors,TQ174.1
  4. First- principles calculations of doped anatase titanium dioxide photocatalytic properties,O643.36
  5. Preparation of One-dimensional Nano TiO2 and Study on the Decolorization of Dyeing Wastewater,TB383.1
  6. Preparation of Electrode by Electrodeposition and Study on Performance of Degradation Phenol Wastewater,X703
  7. First-Principles Studies of Cathode Material LiMO2 (M=Co, Ni, Mn) of Lithium Ion Batteries,TM912
  8. Iron, lanthanum -doped nano TiO \u003csub\u003e 2 \u003c/ sub\u003e Preparation and photocatalytic properties,O614.411
  9. SnO 2 / CNTs composite Controllable Preparation and Gas Sensitivity Study,TB383.1
  10. MWCNTs and ZnO / SnO 2 Composites and NO gas research,TB33
  11. Inorganic / organic magnetic suspension preparation and application,TB383.1
  12. Influence of Doping Effect on Zinc Oxide by First Principles Studies,O614.241
  13. Doped Modification and Application of Titania Photocatalyst,O643.36
  14. Preparation and Properties of Crystalline Glaze for Low Temperature and Fast Firing,TQ174.65
  15. Synthesis of SnO2 by Flame Spray Pyrolysis: Structures Design and the Gas Sensing Properties,TB383.1
  16. Research on Luminescence of Nanoporous Glass Composite Materials,TB383.1
  17. Study on the Graphene Preparation on Cu–Ni Alloy Substrate by Chemical Vapor Deposition,O484.1
  18. Preparation of Zeolite Doping Nano-TiO2 and Research of the Photocatalytic Properties,TB383.1
  19. Preparation and Characterization of Doped BiFeO3 Nanocrystals,TB383.1
  20. Study on Low Temperature Sintered PSN-PZT Piezoelectric Ceramics,TM282
  21. Preparation and Properties of ZnO-based Diluted Magnetic Semiconductors,TN304.21

CLC: > Mathematical sciences and chemical > Physics > Semiconductor physics > Semiconductor Properties of
© 2012 www.DissertationTopic.Net  Mobile