Dissertation > Excellent graduate degree dissertation topics show

The Research on Preparation and Gas Sensitivity of SnO2 /gold Composite Materials

Author: ZhangLiFang
Tutor: LiuXiangDong
School: Huazhong University of Science and Technology
Course: Materials Science
Keywords: nanoscale gold SnO2 nanoparticles SnO2/Au composite material gas sensor sensitivity
Type: Master's thesis
Year: 2011
Downloads: 25
Quote: 0
Read: Download Dissertation


Metal Oxides (MOX) have being drawn more and more attentions as gas sensing materials. Various strategies, such as doping, material nanosizing and incorporation of noble metals particles into metal oxide gas sensing materials, have been adopted to improve their sensitivity.In this work, Au nanostructures and SnO2 nano-crystals have been prepared by chemical method. The effect of preparation conditions on the morphology of Au nanostructures have been investigated. The TEM results show that, the morphology of Au nanostructures were decided by the molar ratio of the HAuCl4 and K2C2O4. With the decreasing of the ratio, the morphology of products gradually evolutes to spider-web-like architectures from nanoparticles.SnO2/Au composite material has been synthesized through chemical interaction between Au nanostructures and SnO2 nano-crystals. PH value is the decisive factor for its synthesis. The XRD results indicates that, SnO2/Au compisite material can formate under acidic conditions.Gas-sensitive performances of the prepared composite material have been investigated. The dependence of gas-sensitivity on gas concentration and operating temperature has been studied. Compared to SnO2 sensor, the sensitivity of composite material is improved, it elevates along with the gas concentration increasing. Moreover, the optimal response temperature for CH3CH2OH fall to 300℃from 350℃.

Related Dissertations

  1. The Effect of Composite Additive on the SNCR,X701
  2. Study on a Pneumatic Manipulator Clamping Force Control System Based on H ∞ Control Theory,TP241
  3. Preparation and Properties of Chitosan-based Thermosensitive Composite Hydrogel,R943
  4. Isolation and Identification of Avian Pathogenic Escherichia Coli from Chicken and Characterizations of Its Virulence-Associated Genes,S852.61
  5. Luoyang Land the Use and Ecoloqical Environment Construction Coordination Study,X171
  6. Cloning and Characterization of Photoperiod Sensitive Gene ZmELF4 in Maize,S513
  7. Change and Value of Serum Soluble Lectin-Like Oxidized Low-Density Lipoprotein Receptor-1 in Acute Coronary Syndrome,R541.4
  8. Effects of Telmisartan on hs-CRP and HMW-adiponectinin Patients with Essential Hypertension,R544.1
  9. Study on Clinical Value of High-sensitivity Cardiac Troponin T Assay in Myocardial Infarction,R542.22
  10. Correlation Analysis between Coronary Lesion Severity and Peripheral Blood Cell CD34~+ Ratio in the Coronary Heart Disease Patients Complicating Diabetes Mellitus,R541.4
  11. The Study on Clinical Using of FISH and Cytology in Diagnosis and Surveillance of Recurrence in UC,R737.1
  12. Application and Significance of CISS Classification and TOAST Subtype on Ischemic Stroke (Attach 210 Cases Analysis),R743.3
  13. Ankle-brachial index combined ultra- sensitivity C-reactive protein determination of the value of coronary artery disease,R541.4
  14. Ischemic stroke and carotid atherosclerosis and related biochemical hs-CRP and LDL-C changes,R743.3
  15. Individuals with type 2 diabetes, serum complement factor H, hs-CRP levels and insulin resistance study,R587.1
  16. Aloe anthraquinones enhanced UV radiation on plant protection,X173
  17. To Explore the Value of Plasma NT-proBNP and Hypersensitive C-reactive Protein in Evaluating the Prognosis of the Patients with Acute Coronary Syndrome,R541.4
  18. Automatic Calibration System Voltage Monitor,TM933.2
  19. Research on NO-reference Image Quality Assessment Based on HVS,TP391.41
  20. Study of Static and Dynamic Collaborative Optimization on Container Ship Structure,U674.131
  21. The Sensitive Motivation Test of the Enterprise Investment - the Cash Flow,F224

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials
© 2012 www.DissertationTopic.Net  Mobile