Dissertation > Excellent graduate degree dissertation topics show

Study on the Preparation of Graphene by Electrochemical Method and Adsorption of Heavy Metalion

Author: LiHongWei
Tutor: LuoFang
School: Northeast Normal University
Course: Inorganic Chemistry
Keywords: Graphene Sodium tetrafluoroborate Electrolytic exfoliation Dispersity Carbon material Adsorption Cadmium Lead
CLC: O613.71
Type: Master's thesis
Year: 2011
Downloads: 384
Quote: 0
Read: Download Dissertation


Graphene is a rapidly rising star on the horizon of materials science and condensed-matter physics. Due to its unique physical, chemical and mechanical properties, graphene has extensive applications in the design of devices of nanoelectronics, catalysis, batteries, supercapacitors, optoelectronics, novel composite materials and sensing materials.In this paper, large-scale synthesis of graphene from graphite was produced by electrolytic exfoliation using sodium tetrafluoroborate as an effective electrolyte. The obtained graphene material was characterized by SEM、TEM、XRD、XPS and AFM. The graphene sheets can be homogeneously distributed in water and various organic matrices without any surfactants or other stabilizers. The conductivity of the graphene sheets can reach as high as 1428.57 S/m. Reaction mechanisms were inferred.The as-prepared graphene was developed for absorption studies of Pb(Ⅱ) or Cd(Ⅱ) ions. Effects of solution pH, contact time, initial concentration were also investigated. From these we can find the best conditions for adsorption. With the assistance of ultrasonic, the determined adsorption capacities are 621 mg/g (pH=5.5) for Pb(Ⅱ) and 134.4 mg/g (pH=6.2) for Cd(Ⅱ), which are much better than shake.In addition, we prepared two carbon materials (CS, CP) by electrolytic exfoliation using sulphuric acid or phosphoric acid as electrolytes, and then the as-prepared materials were developed for absorption studies of Pb(Ⅱ) or Cd(Ⅱ) ions.

Related Dissertations

  1. Density Functional Theory Study of Dimethyl Ether Adsorption on the Low-Index Pt Surface,O485
  2. Preparation of Based on the Phenolic Resin of Activated Carbon and Adsorption-Photopcatalytical Character of Supported TiO2,TQ424.19
  3. Competitive Adsorption of Phenolic/Ethanol onto Silica Fiber Effected by Ultrasound in RTM Process,TB332
  4. Research on Geological Features of Yinchanggou-Qiluogou Lead-Zinc Ore Deposit, Ningnan County, Sichuan Province,P618.4
  5. Studies on Synthesis, Characterization and Properties of Fe-V Co-doped TiO2 Catalyst,O614.411
  6. Establishment of ELISA for Detecting Cd-MT of Pteria Penguin and Preliminary Study of ELISA-kit,X835
  7. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  8. ( Hydroxy) Iron Oxide and the removal of arsenic in drinking water,O614.811
  9. Under microaerobic conditions closed calcium carbide furnace exhaust COS gas adsorption purification,X781
  10. Ion Exchange Removal of Hexavalent Selenium in Raw Water,X703
  11. Study on the Chimisorption Removal of FCC Gasoline Sulfur Compound,TE624.55
  12. Study on the Accumulation and Remove of Cadmium and Lead in Oysters,X174
  13. Preparationandapplication of Pan-Based Amphoteric Ion Exchange Fiber,TQ342.31
  14. Study on the Preparation of Medical Grade Glycerol from the By-product of Jatropha Biodiesel,TQ223.163
  15. Experiment Study of the Biogas Purification Process by Zeolite Filling Washing,TQ221.11
  16. Study on the Synthesis and Adsorption Behaviour of Chitosan Derivative,TS254.9
  17. Preparation of Activated Carbon from Tobacco Stems and Application for Low Concentration Phosphine Adsorption,X712
  18. Effects of Low Molecular Organic Acids on Immobilazition of Lead Ions by Nanosized Hydroxyapatite,S153
  19. Preparation and Properties of lead-free glass powder,TQ171.6
  20. Adsorption Effects of Phosphate and Chromium from Aqueous Solution by Adsorption Using LDH and Mg/Fe/Al Modified Montmorillonites,X703
  21. Optimization Design Andapplication of Extracting Methods of Maize (Zea Mays L.) Volatile Compounds,S513

CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Non-metallic elements and their compounds > Part Ⅳ family of non-metallic elements (carbon and silicon ) and its compounds > Carbon C
© 2012 www.DissertationTopic.Net  Mobile