University Sétif 1 FERHAT ABBAS Faculty of Sciences
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Titre : Green synthesis of ZnO nanoparticles Type de document : document électronique Auteurs : Soumia Medkour, Auteur ; Youcef Medkour, Directeur de thèse Editeur : Setif:UFA Année de publication : 2024 Importance : 1 vol (79 f.) Format : 29 cm Langues : Anglais (eng) Catégories : Thèses & Mémoires:Physique Mots-clés : Nanoparticles
Zinc oxide
Green synthesis
Bee pollen
PhytochemicalsIndex. décimale : 530 - Physique Résumé :
The objective of this study is exhibit a novel, cost-effective, non-toxic and green way to prepare ZnO nanoparticles (NPs) using Bee Pollen plant extract as both reducing and capping agents without any hazardous material. It was found that the size and morphology of the ZnO NPs significantly depended on physicochemical parameters such as the annealing temperature. X-ray diffraction analysis confirmed that the synthesized NPs has Wurtzite hexagonal structure with an average crystallite size of 14.99 and 19.98 nm for ZnO-R1 and ZnO-R2. UV-vis analysis of the nanoparticles showed broad peaks around 387 nm for the ZnO NPs and a direct bandgap of 3.31 eV was calculated for the ZnO NPs from (ZnO-R1). In addition, FTIR results provided the presence of both, plant extract and ZnO NPs.Note de contenu : Sommaire
Introduction ............................................................................................................................... 1
1. Background ............................................................................................................................ 2
2. Aims and objectives ............................................................................................................... 3
Chapter 1 ................................................................................................................................... 8
1. Nanoparticles .......................................................................................................................... 9
2. Categories of Nanoparticles ................................................................................................... 9
2.1. Organic nanoparticles .................................................................................................... 10
2.2. Inorganic nanoparticles ................................................................................................. 10
3. Synthesis of nanoparticles .................................................................................................... 12
3.1. Physical methods ........................................................................................................... 13
3.2. Chemical methods ......................................................................................................... 13
3.3. Biological methods ........................................................................................................ 13
4. Zinc oxide nanoparticles ...................................................................................................... 15
5. Properties of ZnO nanoparticles ........................................................................................... 17
5.1. Crystal structure ............................................................................................................ 17
5.2. Morphological properties .............................................................................................. 17
5.3. Electronic properties .................................................................................................... 17
5.4. Optical properties .......................................................................................................... 19
5.5. Electrical properties ....................................................................................................... 20
5. 6. Chemical Properties ..................................................................................................... 20
6. Green synthesis of ZnO NPs ................................................................................................ 20
7. Applications of ZnO ............................................................................................................ 21
8. Plant extracts-mediated synthesis of ZnO NPs ................................................................... 22
9. Role of phytochemicals for NPs biosynthesis ...................................................................... 25
10. Protocol for the eco-benevolent synthesis of ZnO NPs .................................................... 26
11. Factors affecting the synthesized ZnO NPs using plant extracts ....................................... 27
11.1. Effect of Temperature ................................................................................................. 27
11.2. Effect of pH ................................................................................................................. 28
11.3. Effect of Precursor ...................................................................................................... 29
11.4. Effect of Plant Extract ................................................................................................. 29
11.5. Effect of Reaction Time .............................................................................................. 30
12. Proposed mechanism for plant extract mediated synthesis of ZnO NPs ............................ 31
Chapter 2 ................................................................................................................................. 40
1 .Bee Pollen based NPs and their applications ....................................................................... 41
1.1 .Pollen description .......................................................................................................... 41
2 .Physico-chemical properties ................................................................................................ 42
2.1 .Physical properties ........................................................................................................ 42
2.2 Chemical properties ........................................................................................................ 43
3. Collection process of bee pollen by honeybee ..................................................................... 47
................................................................................................................................................. 48
4. Bee Pollen applications ........................................................................................................ 48
5. Bee Pollen based nanoparticles ............................................................................................ 49
6. The characterization methods of green-synthesized ZnO nanoparticles .............................. 49
6.1. X-Ray diffraction (XRD) .............................................................................................. 50
6.2. Fourier Transform Infrared Spectroscopy (FTIR)......................................................... 52
6.3. UV-visible absorption spectrometer .............................................................................. 53
Chapter3 .................................................................................................................................. 54
1. Materials and Methods ......................................................................................................... 58
1.1. Materials ........................................................................................................................ 58
1.2. Instruments .................................................................................................................... 59
1.3 Preparation of Bee pollen extract ................................................................................... 59
1.4. Biogenic synthesis of ZnO NPs .................................................................................... 60
1.5. Characterization of BP-ZnO NPs .................................................................................. 62
2. Results and Discussion ......................................................................................................... 62
2.1. Structural analysis ......................................................................................................... 62
2.2. Optical analysis ............................................................................................................. 68
2.3. Chemical composition analysis ..................................................................................... 71
Conclusion ............................................................................................................................... 73Côte titre : MAPH/0642 Green synthesis of ZnO nanoparticles [document électronique] / Soumia Medkour, Auteur ; Youcef Medkour, Directeur de thèse . - [S.l.] : Setif:UFA, 2024 . - 1 vol (79 f.) ; 29 cm.
Langues : Anglais (eng)
Catégories : Thèses & Mémoires:Physique Mots-clés : Nanoparticles
Zinc oxide
Green synthesis
Bee pollen
PhytochemicalsIndex. décimale : 530 - Physique Résumé :
The objective of this study is exhibit a novel, cost-effective, non-toxic and green way to prepare ZnO nanoparticles (NPs) using Bee Pollen plant extract as both reducing and capping agents without any hazardous material. It was found that the size and morphology of the ZnO NPs significantly depended on physicochemical parameters such as the annealing temperature. X-ray diffraction analysis confirmed that the synthesized NPs has Wurtzite hexagonal structure with an average crystallite size of 14.99 and 19.98 nm for ZnO-R1 and ZnO-R2. UV-vis analysis of the nanoparticles showed broad peaks around 387 nm for the ZnO NPs and a direct bandgap of 3.31 eV was calculated for the ZnO NPs from (ZnO-R1). In addition, FTIR results provided the presence of both, plant extract and ZnO NPs.Note de contenu : Sommaire
Introduction ............................................................................................................................... 1
1. Background ............................................................................................................................ 2
2. Aims and objectives ............................................................................................................... 3
Chapter 1 ................................................................................................................................... 8
1. Nanoparticles .......................................................................................................................... 9
2. Categories of Nanoparticles ................................................................................................... 9
2.1. Organic nanoparticles .................................................................................................... 10
2.2. Inorganic nanoparticles ................................................................................................. 10
3. Synthesis of nanoparticles .................................................................................................... 12
3.1. Physical methods ........................................................................................................... 13
3.2. Chemical methods ......................................................................................................... 13
3.3. Biological methods ........................................................................................................ 13
4. Zinc oxide nanoparticles ...................................................................................................... 15
5. Properties of ZnO nanoparticles ........................................................................................... 17
5.1. Crystal structure ............................................................................................................ 17
5.2. Morphological properties .............................................................................................. 17
5.3. Electronic properties .................................................................................................... 17
5.4. Optical properties .......................................................................................................... 19
5.5. Electrical properties ....................................................................................................... 20
5. 6. Chemical Properties ..................................................................................................... 20
6. Green synthesis of ZnO NPs ................................................................................................ 20
7. Applications of ZnO ............................................................................................................ 21
8. Plant extracts-mediated synthesis of ZnO NPs ................................................................... 22
9. Role of phytochemicals for NPs biosynthesis ...................................................................... 25
10. Protocol for the eco-benevolent synthesis of ZnO NPs .................................................... 26
11. Factors affecting the synthesized ZnO NPs using plant extracts ....................................... 27
11.1. Effect of Temperature ................................................................................................. 27
11.2. Effect of pH ................................................................................................................. 28
11.3. Effect of Precursor ...................................................................................................... 29
11.4. Effect of Plant Extract ................................................................................................. 29
11.5. Effect of Reaction Time .............................................................................................. 30
12. Proposed mechanism for plant extract mediated synthesis of ZnO NPs ............................ 31
Chapter 2 ................................................................................................................................. 40
1 .Bee Pollen based NPs and their applications ....................................................................... 41
1.1 .Pollen description .......................................................................................................... 41
2 .Physico-chemical properties ................................................................................................ 42
2.1 .Physical properties ........................................................................................................ 42
2.2 Chemical properties ........................................................................................................ 43
3. Collection process of bee pollen by honeybee ..................................................................... 47
................................................................................................................................................. 48
4. Bee Pollen applications ........................................................................................................ 48
5. Bee Pollen based nanoparticles ............................................................................................ 49
6. The characterization methods of green-synthesized ZnO nanoparticles .............................. 49
6.1. X-Ray diffraction (XRD) .............................................................................................. 50
6.2. Fourier Transform Infrared Spectroscopy (FTIR)......................................................... 52
6.3. UV-visible absorption spectrometer .............................................................................. 53
Chapter3 .................................................................................................................................. 54
1. Materials and Methods ......................................................................................................... 58
1.1. Materials ........................................................................................................................ 58
1.2. Instruments .................................................................................................................... 59
1.3 Preparation of Bee pollen extract ................................................................................... 59
1.4. Biogenic synthesis of ZnO NPs .................................................................................... 60
1.5. Characterization of BP-ZnO NPs .................................................................................. 62
2. Results and Discussion ......................................................................................................... 62
2.1. Structural analysis ......................................................................................................... 62
2.2. Optical analysis ............................................................................................................. 68
2.3. Chemical composition analysis ..................................................................................... 71
Conclusion ............................................................................................................................... 73Côte titre : MAPH/0642 Exemplaires (1)
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