Preparation of ZnO QDs seeds

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Table of contents

1. Chapter 1 State of Art
1.1 Introduction
1.2 Plasmonic-semiconductor hybrid nanomaterials
1.3 ZnO-Au: The studied plasmonic-semiconductor nanomaterial
1.3.1 ZnO nanostructures
1.3.2 Gold nanoparticles
1.4 New/Enhanced features brought by plasmonic-semiconductor heterojunction
1.5 Tunable optical properties (absorption and fluorescence)
1.5.1 Heterojunction modified absorption of both materials
1.5.2 Heterojunction modified SC’s fluorescence
1.5.3 SERS enhancement
1.5.4 Stimulating charge transfer after photo-induced charge separation
1.6 Applications of plasmonic-semiconductor heterojunctions
1.6.1 Solar cells
1.6.2 Catalysis-based applications
1.7 Engineering of plasmonic-semiconductor nanomaterials
1.8 Conclusion
1.9 References
2. Chapter 2 Synthesis and characterization of pure ZnO nanostructures highly efficient for photocatalysis
2.1 Introduction
2.2 Experimental part
2.2.1 Synthesis process
2.2.1.1 Preparation of stock solutions (Zn and O sources)
2.2.1.2 Preparation of ZnO QDs seeds
2.3 Results and discussion
2.3.1 Optimization of the synthesis reaction parameters
2.3.1.1 Effect of raw materials concentration
2.3.1.2 Role of synthesis time, temperature, and post-thermal treatment
2.3.1.3 Effects of synthesis time
2.3.1.4 Effects of synthesis temperature
2.3.2 Structural properties
2.3.2.1 TGA Analysis
2.3.2.2 XRD analysis
2.3.2.3 XPS analysis
2.3.2.4 SEM analysis
2.3.2.5 TEM analysis
2.3.3 Optical properties
2.3.3.1 Absorption measurements
2.3.3.2 Photoluminescence measurements
2.3.3.3 Photocatalytic activity
2.4 Conclusion
2.5 References
3. Chapter 3 ZnO-Au heterojunction enhanced the fluorescence and photocatalytic properties of ZnO NPs
3.1 Introduction
3.2 Experimental part
3.2.1 Reagents
3.2.2 Synthesis of gold nanoparticles (GNPs)
3.2.3 Coupling ZnO to GNPs
3.3 Results and discussion
3.3.1 Role of the semiconductor part (ZnO size) in the interaction with GNPs
3.3.2 Role of the plasmonic part (GNPs size or number, capping) in the interaction with ZnO nanocrystals
3.3.3 Photocatalytic performance of ZnO-GNPs
3.3.4 Other strategies of plasmon-exciton coupling
3.3.4.1 Real-time synthesis of GNPs over ZnO NPs: real-time interaction
3.3.4.2 Capping GNPs after reduction
3.3.4.3 Tailoring the heterojunction distance between ZnO and GNPs: Free capping hybrid nanoparticles
3.4 Conclusion
3.5 References
4. Chapter 4 Conclusions and perspectives
4.1 Conclusions
4.2 Future work and perspectives
4.3 References
5. Chapter 5 Supplementary information
5.1 Appendix-A
5.1.1 Effect of dilution in PL measurements
5.1.2 Reproducibility (Stability of dispersions)
5.1.3 Raw materials ZnO coupled into different CTAB-capped GNPs
5.1.4 Raw materials ZnO coupled into different CTAB-capped GNPs
5.1.5 CTAB-capped ZnO NPs (no GNPs)
5.1.6 ZnO NPs embedded PMMA holes
5.1.7 Role of ZnO mass embedded in PMMA holes
5.1.8 Different stabilizers mediated the heterojunction distance
5.1.9 Large area monolayer of ZnO NPs
5.2 Appendix-B
5.2.1 Characterization techniques:
5.2.1.1 Photoluminescence (PL)
5.2.1.2 UV-visible absorption spectroscopy
5.2.1.3 X-Ray diffraction (XRD)
5.2.1.4 Transmission electron microscopy (TEM)
5.2.1.5 Scanning electron microscopy (SEM)
5.2.1.6 Photocatalysis
5.2.1.7 Thermogravimetric analysis (TGA)
5.2.1.8 X-ray photoelectron spectroscopy (XPS)
5.2.1.9 Atomic Force microscopy (AFM)
5.2.1.10 Optical microscopy
5.3 References