Photodeposition of platinum nanoparticles on wel-defined tungsten oxide : controlling oxidation state, particle size and geometrical distribution

Abstract

Chapter 2-Principles, mechanism, and applications of photodeposition in (photo)catalysis 2.1 Introduction to photodeposition 2.2 Photodeposition of particles on TiO 2 2.3 Photodeposition of Ag on ZnO 2.4 Photodeposition of particles on WO 3 2.4.1 Photodeposition of Pt on WO 3 2.4.2 Photodeposition of other metals on WO 3 2.4.3 Photodeposition of Ag/AgX (X = Cl or Br) particles on WO 3 2.4.4 Photodeposition on composite photocatalysts containing WO 3 2.5 Structure-directed photodeposition 2.6 Points for improvement in photodeposition studies 2.6.1 Loading vs. doping 2.6.2 Verification of the valence state of as-deposited particles 2.6.3 Verification of wt loading 2.6.4 Measuring of the photon flux 2.6.5 Conclusions about bandgap change 2.6.6 Conclusions on favored reductive and oxidative sites 2.6.7 High temperature treatment 2.7 Summary and future perspectives of photodeposition 2.8 Bibliography Chapter 3-Towards temperature-dependent crystal facet engineering of hydrate-free WO 3 with plate-like morphology 3.1 Introduction 3.2 Materials and methods 3.3 Results and discussion 3.3.1 Characterization of as-synthesized WO 3 samples 3.3.2 Photocatalytic performance of synthesized WO 3 samples 3.4 Conclusions 3.5 Bibliography 3.6 Appendix Chapter 4-Phase transformations in citric acid-assisted hydrothermal growth of WO 3 and implications for photocatalytic performance 4.1 Introduction 4.2 Materials and methods 4.3 Results and discussion 4.3.1 In situ Raman spectroscopy of crystal phases during hydrothermal synthesis of WO 3 4.3.2 Microwave-assisted hydrothermal synthesis experiments 4.3.3 Photocatalytic activity tests 4.4 Conclusions 4.5 Bibliography 4.6 Appendix Chapter 5-Photodeposition mechanism of platinum on tungsten oxide and its corresponding stability upon aqueous phase illumination 5.