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研究生:席布肯
研究生(外文):Pawan KumarSingh
論文名稱:製備磁性氧化鋅@鐵酸錫奈米顆粒於還原石墨烯之複合材料於高效率吸附降解有機染劑之研究
論文名稱(外文):Study of SnFe2O4@ZnO Decorated on reduced Graphene Oxide as Magnetic Nanocomposites with Highly Adsorption Efficiency of Organic Dyes
指導教授:陳嘉勻
指導教授(外文):Chia-Yun chen
學位類別:碩士
校院名稱:國立成功大學
系所名稱:尖端材料國際碩士學位學程
學門:自然科學學門
學類:其他自然科學學類
論文種類:學術論文
論文出版年:2020
畢業學年度:108
語文別:英文
論文頁數:76
外文關鍵詞:Adsorptionisothermsnanocompositesco-precipitation
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Synthesis of SnFe2O4@ZnO nanocomposite decorated with the reduced graphene oxide (rGO) showing highly efficient dye adsorption properties was successfully developed. Prior to the decoration process, the SnFe2O4@ZnO were synthesized by low-cost and simple co-precipitation method. The decoration of SnFe2O4@ZnO with rGO was conducted via facile ultrasonication and consecutive heat treatment. Adsorption efficiency of as-synthesized SnFe2O4@ZnO@rGO was identified using UV-Visible spectrometer under dark ondition and found to reach 90% after 20 min based on 16 wt.% rGO. The reusability of SnFe2O4@ZnO@rGO-16 was excellent because of the magnetic fatures SnFe2O4 which can be recycled using a magnet. In addition, the adsorption quilibrium was analyzed and represented via Langmuir, Freundlich and Dubinin-Radushkevich isotherms models. The kinetics data resented good correlation coefficient (R2) values of 0.993 orresponding to Freundlich isotherm models. The SnFe2O4@ZnO@rGO-16 nanocomposites were identified to
own large surface area by BET 120.33 m2/g. The anocomposites were characterized by XRD, SEM, FTIR, RAMAN, PL, BET and Zeta Potential.
Table of Contents
Abstracts ...................................................................................................................... i
Acknowledgement ...................................................................................................... ii
Table of Contents .......................................................................................................iii
List of Figures ............................................................................................................ vi
List of Tables ............................................................................................................... x
Chapter 1 Introduction ........................................................................................... 1
1.1 Overview ............................................................................................... 1
1.2 Motivation ............................................................................................. 3
1.3 Objectives ............................................................................................. 4
Chapter 2 Literature Review ................................................................................. 5
2.1 Adsorption ............................................................................................ 5
2.2 Factors affecting adsorption of dye ...................................................... 7
2.2.1 Effect of Solution pH ....................................................................... 8
2.2.2 Effect of initial dye concentration ................................................. 10
2.2.3 Effect of temperature ..................................................................... 11
2.2.4 Effect of amount of adsorbent ....................................................... 12
2.3 Adsorption efficiency on 2D materials of MOS2 ............................... 12
Chapter 3 Experimental Method ......................................................................... 15
3.1 Materials details .................................................................................. 15
3.2 Experimental Process.......................................................................... 17
3.2.1 Synthesis of SnFe2O4 nanoparticles ............................................... 17
3.2.2 Synthesis of SnFe2O4@ZnO nanocomposites ............................... 17
3.2.3 Synthesis of reduced Graphene Oxide@SnFe2O4@ZnO
iv
doi:10.6844/NCKU202001612
nanocomposites ......................................................................................... 17
3.3 Dye adsorption Testing ....................................................................... 19
3.4 Characterization Tools ........................................................................ 20
3.4.1 X-Ray Diffraction (XRD) .............................................................. 20
3.4.2 Ultrahigh Resolution Scanning Electron Microscope (UHR-SEM)
22
3.4.3 Energy Dispersive spectrometer (EDS) ......................................... 24
3.4.4 Photoluminescence spectroscopy (PL) .......................................... 25
3.4.5 UV-Visible Spectroscopy ............................................................... 26
3.4.6 Fourier Transform infrared spectroscopy (FTIR) .......................... 27
3.4.7 Raman spectroscopy ...................................................................... 29
3.4.8 Zeta-Potential Analysis .................................................................. 30
3.4.9 Superconducting Quantum Interference Device Vibrating Sample
Magnetometer (SQUID-VSM) ................................................................. 32
3.4.10 Surface Area and prosmetric analyzer (BET) ................................ 34
Chapter 4 Results and Discussion ....................................................................... 35
4.1 Structure and characteristics analysis of SnFe2O4@ZnO@rGO
nanocomposites ................................................................................................. 35
4.1.1 X-ray Diffraction (XRD) analysis ................................................. 35
4.1.2 SEM Analysis ................................................................................ 36
4.1.3 EDS Analysis ................................................................................. 38
4.1.4 Photoluminescence (PL) Analysis ................................................. 39
4.1.5 Fourier Transform Infrared Spectroscopy (FTIR) Analysis .......... 40
4.1.6 RAMAN Spectroscopy Analysis ................................................... 41
4.1.7 Zeta Potential Analysis .................................................................. 43
v
doi:10.6844/NCKU202001612
4.1.8 Adsorption Mechanism .................................................................. 45
4.1.9 SQUID VSM Analysis ................................................................... 46
4.1.10 Surface area and porosimetric (BET) Analysis ............................. 48
4.2 Adsorption efficiency of organic dyes ................................................ 50
4.3 Kinetics isotherm models ................................................................... 63
4.4 Reusability and stability of SnFe2O4@ZnO@rGO-16 ....................... 65
Chapter 5 Conclusion .......................................................................................... 66
Chapter 6 Future Work ........................................................................................ 67
References ................................................................................................................. 68
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