Dissertation > Excellent graduate degree dissertation topics show

Studies on Syntheses of Precious Metal Nanoclusters and Their Catalytic and Magnetic Properties

Author: YangLiPing
Tutor: WangWenChuanï¼›TuWeiXia
School: Beijing University of Chemical Technology
Course: Chemical Engineering
Keywords: Nano - metal clusters Microwave radiation Preparation Catalytic properties Magnetic properties
CLC: O643.32
Type: Master's thesis
Year: 2006
Downloads: 194
Quote: 1
Read: Download Dissertation

Abstract


This paper studies the synthesis and catalytic metal clusters of nanometer consistent , magnetic properties , including the following : 1) the use of chemical reduction synthesis of polyvinylpyrrolidone (PVP) stable , non - supported palladium / iron oxide nano metal colloidal clusters and load type Pd / Fe 2 O 3 , Pd / Fe 3 O 4 and Pd-Pt/Fe 3 O 4 nano - metal clusters , and transmission electron microscopy ( TEM ) , vibrating sample magnetometer (VSM) with its characterization . Resulting Pd / Fe 3 O 4 and Pd-Pt/Fe 3 O 4 sample with magnetic With easy recovery of advantages to the magnetic field in the selective hydrogenation of o-chloronitrobenzene reaction showed better catalytic performance than Pd and Pd-Pt nano - metal clusters and reusability . 2 ) Prepared by Microwave the PVP stability of gold colloid particles , effects of alcohol reducing agent as well as alkali gold particles formed were characterized using a transmission electron microscope , UV - visible spectrophotometer . The results showed that the microwave prepared gold colloidal particles with a small particle size , good dispersion . The size and shape of the gold particles with different alcohol the kind of the reducing agent and an alkali NaOH dosage , there are significant changes . UV - visible absorption spectra showed that the faster the system of adding an alkali in the reaction mixture , the rate of formation of the gold particles were significantly higher than not adding an alkali , and is conducive to the formation of spherical gold particles . 3) synthesized by chemical reduction method organic molecular layer ( Octadecanethiol ) is protected palladium and palladium / iron oxide , metal clusters , the obtained nano - particles have an average particle size of about 1.5nm . Research

Related Dissertations

  1. Phosphorus pentoxide composite ammoniated condensing agent preparation of ammonium polyphosphate,TQ314.248
  2. Preparation and Properties of Highly Active Dietary Fiber and Carboxymethylcellulose from Gracilaria Residue,TS254.9
  3. Experiments on Microwave Radiation Activation YunNan Unburned Coal-gangue Concrete,TU528
  4. Improvement of Preparation Technology for Chitin and Chitosan from By-product of Litopenaeus Vannamei,TS254.9
  5. The Research of the Sludge Characteristics in the Cephalosporin Intermediate Pharmaceutical Wastewater by the Treatment of the NMBR,X787
  6. Synthesis and Quality Control Research of ATPR,TQ463
  7. Preparation and Evaluation on the Toxicological Safety and Stability of Deer Blood Wine,TS262.91
  8. Study on the Preparation Technology and Quality Standard of Danggui Dropping Pills,TQ461
  9. Experiment Study on the Effect of Hybrid Coat in Closing of Dentinal Tubules,R781.2
  10. The Synthrsis of Novel Purine Nucleoside Modified by C~6-Alkyl and C~6-Heterocyclic,TQ460.1
  11. Exploratory Studies on the Effective Fractions of Tianshu Capsule,R283
  12. Preparation of Compound wind particles and preparation of quality standard,TQ461
  13. Crude oil loading system transformation project management research,F284
  14. Japanese encephalitis virus monoclonal antibodies and preliminary application,R392
  15. 1,3 - propanediamine shrink o-vanillin 3d-4f heteronuclear bimetallic complexes synthesis, structure and properties of,O627.3
  16. Preliminary Investigation on the Historical Value of the Records of the Border Defense Council of the Joseon Dynasty,K312
  17. Preparation of Chemical Test Problems and Coping Strategies,G633.8
  18. Design and Implementation of SOA-based institutions preparing management system,TP311.52
  19. First-principles Study on Magnetic and Optical Properties of Rutile TiO2,O614.411
  20. Water-based casting Cordierite ceramic green sheet and its properties,TQ174.62
  21. Oilfield chemical flooding preparation station monitoring system development and research,TE938

CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalytic reaction
© 2012 www.DissertationTopic.Net  Mobile