Dissertation > Excellent graduate degree dissertation topics show

Systhesis and Characterization of Bi2S3 Nanostructures under Ultrasonic Radiation

Author: YinHeng
Tutor: LiShiPu
School: Wuhan University of Technology
Course: Biomaterial
Keywords: Bi2S3 nanostructure ultrasonic radiation
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 184
Quote: 0
Read: Download Dissertation

Abstract


In this thesis,we mainly discussed the synthesis of Bi2S3 nanostructures under ultrasonic radiation.By means of changing the reaction conditions,Bi2S3 nanostructures were obtained.Powder x-ray diffraction(XRD),transmission electron microscopy(TEM) and scanning electron microscopy(SEM) were employed to characterize the Bi2S3 nanostructures.The major researches might be summarized as follows:1.Bismuth nitrate and thiourea were used as bismuth source and sulfur source, respectively,as well as glycol and dilute nitric acid as solvents.Bismuth nitrate was dissolved into glycol as the oil phase,and thiourea was dissolved into the dilute nitric acid as the water phase.2.Changing the proportion of glycol in the system,from 0 to 100%,tOhe different morphologies of Bi2S3 nanostructures were obtained.We found that the best proportion of glycol in the system is 50%or near the 50%.3.The influence to the formation and morphology of the Bi2S3 nanostructures caused by the concentration of dilute nitric acid was also studied.Keeping the total volume unchanged,we change the proportion of water and dilute nitric acid to be 1:3, 1:1,3:1 in the system,respectively.4.The influence of the parameters of ultrasonic radiation was investigated. While fixing the interval time as 2 min,four ultrasonic parameters were employed, including 2 min per time/5 cycles;1 min per time/5 cycles;5 min per time/5 cycles; 2 min per time/3 cycles.In conclusion,our results show that when the proportion of glycol in the system is 50%,the proportion of water and dilute nitric acid is 1:1 in water phase,the reaction time is 16h,the ultrasonic parameters is 2 min per time/5 cycles.The near monodisperse Bi2S3 flowerlike nanostructures were obtained.

Related Dissertations

  1. Influence of Nanostructure on Hydrophobic Properties at TiO2 Surface Studied by Molecular Dynamics Simulation,O614.411
  2. Synthesis and Characterization of Polyaniline Micro/nano Structure and Its Composites,TB383.1
  3. Effect of Ultrasonic Wave on the Stability of Mixed Crude Oil,TE622.1
  4. Synthesis of SnO2 by Flame Spray Pyrolysis: Structures Design and the Gas Sensing Properties,TB383.1
  5. Morphology-controlled Synthesis of Bi2S3-based Photocatalysts and Their Photocatalytic Performance,TB383.1
  6. Surface Microstructuring for Structural Colors Effects on Synthetic Fiber by Hot-embossing,TS190.1
  7. An Experimental Probe in High Gradient Magnetic Separation Assisted by Ultrasonic Wave Vibration,TD951
  8. Some Applications of the Oximes in the Organic Synthesis,TQ203
  9. Synthesis and Properties of ZnO Rods and Lotus Leaves-shaped Nanostructures by Solution Approach,TB383.1
  10. Synthesis and Characterization of One Dimension Inorganic Nanostructured Materials Using Porous Alumina Membrance,TB383.1
  11. Micro-Nanofabracation and Wettability of Zno Superhydrophobic Structures,TB383.1
  12. Physical Properties and Controllable Synthesis of 3-dimensional ZnO Nanostructures,TB383.1
  13. Preparation and Properties Characterization of Rare Earth Oxide Nanostructured Fibers,TB383.1
  14. Synthesis and Properties of Ax(BO4y Nanostructure Materials,TB383.1
  15. Ultrasonic Nano gallium -palladium alloy / PMMA Composites,TB33
  16. Giant Magnetoresistance Effect in Hybrid Ferromagnetic-Schottky-metal and Semiconductor Nanostructures,O469
  17. Synthesis of Novel Nanostructures by Using Millisecond Pulsed Laser,TB383.1
  18. Preparation and properties of doped europium fluoride phosphate strontium nanomaterials,TB383.1
  19. Synthesis、Characterizations and Optics Property of Sb Doped SnO2 One-dimensional Nanostructures,TB383.1
  20. Research on the Design and Implementation of the Multi-layer Film Based on VO2,O484.41
  21. Preparation and Characterization of CeB6 and AlB2 Nanomaterials,TB383.1

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