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Photooxidation of Methane over Au/SiO₂ catalysts under Mild Conditions

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CHAPTER 1. INTRODUCTION 1
1.1. Background 1
1.2. Noble metals induced photocatalysis systems. 9
1.3. Reactive oxygen species (ROS) 26
CHAPTER 2. EXPERIMENTS 29
2.1. Materials 29
2.2. Catalyst preparation procedure 29
2.3. Catalyst characterization 30
2.4. Photoreaction procedure 31
2.5. Kinetic evaluation 32
2.6. Singlet oxygen (¹O₂) detection 33
CHAPTER 3. RESUTLS AND DISCUSSION 35
3.1 Photocatalytic oxidation of CH₄ by Au NPs. 36
3.2. Plasmonic modulation of catalytic activity. 48
3.3. Determination of the time-dependent concentrations for the oxygenated products in CH₄OR 49
3.4. Dependence of CH₄OR kinetics on reactant concentrations. 51
3.5. Singlet oxygen generation induced by photoirradiation of Au NPs. 55
3.6. Metal contents dependence 62
3.7. Support dependence 71
CHAPTER 4. CONCLUSIONS 82
REFERENCES 84

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