| 作者简历 | 第7-9页 |
| 摘要 | 第9-13页 |
| abstract | 第13-18页 |
| Chapter 1 Introduction | 第23-62页 |
| 1.1 Research background | 第23-25页 |
| 1.2 Introduction on bismuth-based semiconductor and the principles of photocatalysis | 第25-30页 |
| 1.2.1 Introduction on bismuth-based semiconductor | 第25-27页 |
| 1.2.2 Principles of semiconductor photocatalysis | 第27-30页 |
| 1.3 Modification strategies for enhanced visble-light responsive photocatalytic activity of bismuth-based semiconductor | 第30-52页 |
| 1.3.1 Electronic band structure modification strategies | 第31-37页 |
| 1.3.2 Migration of photogenerated carriers by fabrication of nanocomposites | 第37-49页 |
| 1.3.3 Morphology control and surface treatment | 第49-52页 |
| 1.4 Methods for preparation of Bi-based semiconductor nanocomposites | 第52-54页 |
| 1.5 Techniques for studying the semiconductor photocatalysis | 第54-58页 |
| 1.5.1 Material structure investigation | 第54-56页 |
| 1.5.2 Photocatalytic performance test | 第56-57页 |
| 1.5.3 Photoelectric performance test | 第57页 |
| 1.5.4 Theoretical calculation | 第57-58页 |
| 1.6 Target of this Ph D work | 第58-62页 |
| 1.6.1 Main research contents | 第59-60页 |
| 1.6.2 Innovation of this thesis: | 第60-62页 |
| Chapter 2 High dispersive gold on the surface of bismuth tungstate with enhanced visible absorption and catalytic degradation of ofloxacin | 第62-82页 |
| 2.1 Preporation of Bi_2WO_6 nanosheets and Au/Bi_2WO_6 photocatalysts | 第63-66页 |
| 2.1.1 Reagents and instruments | 第63-64页 |
| 2.1.2 Synthesis of Bi_2WO_6 nanosheets | 第64页 |
| 2.1.3 Synthesis of Au/Bi_2WO_6 nanocomposites | 第64-65页 |
| 2.1.4 The photocatalytic activity test | 第65-66页 |
| 2.2 Characterization of the Au/Bi_2WO_6 | 第66-70页 |
| 2.2.1 Crystal phase characterization of the Au/Bi_2WO_6 | 第66-67页 |
| 2.2.2 Morphology characterization of the Au/Bi_2WO_6 | 第67-68页 |
| 2.2.3 Chemical composition and surface states of as prepared samples | 第68-70页 |
| 2.3 Photocatalytic activity of the Au/Bi_2WO_6 | 第70-75页 |
| 2.4 Study on photocatalysis mechanism of the Au/Bi_2WO_6 nanocomposites | 第75-81页 |
| 2.4.1 Optical absorption properties of photocatalyst | 第75-77页 |
| 2.4.2 PL emission and electron/hole recombination | 第77-78页 |
| 2.4.3 Mott-Schottky measurements (MS) | 第78页 |
| 2.4.4 Trapping experiments | 第78-80页 |
| 2.4.5 Mechanism for significantly enhanced photoreduction performance | 第80-81页 |
| 2.5 Conclusions | 第81-82页 |
| Chapter 3 Study on the mechanism of surface lattice defects in enhancing visible light catalytic performance of Au/S/Bi VO_4 | 第82-104页 |
| 3.1 Preparation of Bi VO_4 hierarchical structure and S doped Au/S/Bi VO_4 photocatalysts | 第83-86页 |
| 3.1.1 Reagents and instruments | 第83-84页 |
| 3.1.2 Preparation of flower-like Bi OI | 第84页 |
| 3.1.3 Preparation of Bi VO_4 hierarchical structure | 第84-85页 |
| 3.1.4 Preparation of S doped Au/S/Bi VO_4 hierarchical structure | 第85-86页 |
| 3.1.5 The photocatalytic activity test | 第86页 |
| 3.2 Characterization of the Bi VO_4 hierarchical structure | 第86-87页 |
| 3.3 Characterization of the BVSA nanocomposite | 第87-93页 |
| 3.3.1 Chemical composition and surface states of as prepared samples | 第87-89页 |
| 3.3.2 Crystal phase characterization of the BVSA | 第89-90页 |
| 3.3.3 Morphology characterization of the BVSA | 第90-92页 |
| 3.3.4 BET analysis of the BVSA | 第92-93页 |
| 3.4 Photocatalytic activity of the BVSA | 第93-96页 |
| 3.5 Study on photocatalysis mechanism of the BVSA nanocomposites | 第96-102页 |
| 3.5.1 Optical absorption properties of photocatalyst | 第96-98页 |
| 3.5.2 PL emission and electron/hole recombination | 第98-99页 |
| 3.5.3 Mott-Schottky measurements | 第99-100页 |
| 3.5.4 Trapping experiments | 第100-101页 |
| 3.5.5 Mechanism for significantly enhanced photoreduction performance | 第101-102页 |
| 3.6 Conclusions | 第102-104页 |
| Chapter 4 SPR effect of zero-valent bismuth and band-gap regulation for enhancing Bi_2O_2CO_3 visible photocatalytic degradation of ofloxacin | 第104-127页 |
| 4.1 Fabrication of Bi-loaded PO_4- Bi_2O_2CO_3 nanocomposites | 第105-108页 |
| 4.1.1 Materials and instruments | 第105-106页 |
| 4.1.2 Preparation of Bi_2O_2CO_3 and phosphate doped Bi_2O_2CO_3 | 第106-107页 |
| 4.1.3 Fabrication of Bi-loaded PO_4- Bi_2O_2CO_3 with oxygen-vacancy | 第107页 |
| 4.1.4 The photocatalytic activity test | 第107-108页 |
| 4.2 Characterization of Bi-loaded PO_4- Bi_2O_2CO_3 nanocomposites | 第108-115页 |
| 4.2.1 Phase structure characterization of PO_4- Bi_2O_2CO_3 nanocomposites | 第108-109页 |
| 4.2.2 Phase structure characterization of Bi-loaded PO_4- Bi_2O_2CO_3 nanocomposites | 第109页 |
| 4.2.3 Morphology characterization of the samples | 第109-112页 |
| 4.2.4 BET analysis of the samples | 第112-114页 |
| 4.2.5 Chemical composition and surface states of as prepared samples | 第114-115页 |
| 4.3 Photocatalytic activity of the samples | 第115-120页 |
| 4.4 Photocatalytic mechanism investigation of the Bi-P-BOC nanocomposites | 第120-126页 |
| 4.4.1 Optical absorption properties of photocatalyst | 第120-121页 |
| 4.4.2 PL emission and electron/hole recombination | 第121-122页 |
| 4.4.3 Mott-Schottky measurements | 第122-123页 |
| 4.4.4 Trapping experiments | 第123-124页 |
| 4.4.5 Mechanism for significantly enhanced photoreduction performance | 第124-126页 |
| 4.5 Conclusions | 第126-127页 |
| Chapter 5 Effective widening of the band gap of Bi Sex materials and adding H2O2 for enhanced visible-light-driven photocatalytic activity | 第127-151页 |
| 5.1 Fabrication of Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution nanocomposites | 第128-131页 |
| 5.1.1 Materials and instruments | 第128-129页 |
| 5.1.2 Synthesis of Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第129-130页 |
| 5.1.3 The photocatalytic activity evaluation of bismuth selenides | 第130-131页 |
| 5.2 Characterization of the Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第131-135页 |
| 5.2.1. Phase structure characterization of the Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第131-132页 |
| 5.2.2. Morphology characterization of the Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第132-133页 |
| 5.2.3 Chemical composition and surface states of Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第133-135页 |
| 5.2.4 BET analysis of Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第135页 |
| 5.3 The in situ reduction property investigation of EG | 第135-141页 |
| 5.3.1 EG as reductant in preparation of elemental Bi in highly alkaline media | 第135-139页 |
| 5.3.2 EG as reductant in preparation of Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第139-141页 |
| 5.4. Visible-light-driven photocatalytic activity of Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第141-144页 |
| 5.4.1 Enhanced visible-light-driven photocatalytic activity of Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第141-142页 |
| 5.4.2. Key roles of H_2O_2 in the enhancement of MB degradation efficiency over Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution under visible-light irradiation | 第142-144页 |
| 5.5. Photocatalytic mechanism investigation of Bi_2Se_3/Bi_(1.007)Se_(0.993) solid solution | 第144-150页 |
| 5.5.1 Optical absorption properties of photocatalyst | 第144-145页 |
| 5.5.2 PL emission and electron/hole recombination | 第145-146页 |
| 5.5.3 Mott-Schottky measurement | 第146-147页 |
| 5.5.4. Electron spin resonance (ESR) analysis | 第147-149页 |
| 5.5.5 Mechanism for significantly enhanced photoreduction performance | 第149-150页 |
| 5.6 Conclusions | 第150-151页 |
| Chapter 6 Conclusions and perspectives | 第151-155页 |
| 6.1 Conclusions | 第151-153页 |
| 6.2 Perspectives | 第153-155页 |
| Acknowledgements | 第155-157页 |
| Reference | 第157-184页 |
