基于g-C 3 N 4 光催化剂的设计、合成、以及光催化制氢性能的研究

发布时间：2021-12-09 19:03

　　通过太阳能驱动的光催化产氢（H2）是一种非常有前景的可替代能源,有望缓解日益严重的全球能源危机和环境污染问题。最近,氮化碳（g-C3N4）作为一种重要的非金属半导体,在可见光催化水分解产氢方面受到广泛的关注。然而,g-C3N4上电子-空穴对的结合较快,导致光催化活性不能令人满意。为了解决上述难题,本论文设计并合成了基于g-C3N4的高效异质结构光催化剂,以增强电子-电荷分离从而提高光催化活性。此外,本论文研究了在g-C3N4基异质结构光催化剂中电子和空穴传输的机理。本研究包括三个部分,概述如下:在第一部分中,我们合成了一种高效的可见光驱动的C3N4/CoTTP Ⅱ型异质结构光催化剂,通过在g-C3N4表面上修饰介孔四苯基卟啉钴（Ⅱ）（CoTPP）分子,应用于水分解生产H2。CoTPP分子的引入不仅增强了可见光的吸收,而且通过形成C3N4/CoTPPⅡ型异质结加速了电荷的转移。当g-C3N4上负载4 wt%的CoTPP时,在可见光（λ≥420 nm）下,C3N4/CoTPP复合催化剂的H2释放速率提高至46.93 μmol h-1,是g-C3N4（17.21 μmol h-1）的2.73... 

【文章来源】：中国科学技术大学安徽省 211工程院校 985工程院校

【文章页数】：121 页

【学位级别】：博士

【文章目录】：
摘要
ABSTRACT
Chapter 1. Introduction
    1.1 Introduction
    1.2 Photocatalytic Water Splitting
        1.2.1 Photocatalytic Water Splitting Mechanism
        1.2.2 Hydrogen Evolution from Photocatalytic Water Splitting
        1.2.3 Photocatalytic Materials and its Properties
    1.3 Graphitic Carbon Nitride (g-C_3N_4)
        1.3.1 Origin, Structure and Properties of g-C_3N_4
        1.3.2 Method of Preparation g-C_3N_4
        1.3.3 Modification of g-C_3N_4
    1.4 Thesis Objectives
    1.5 Thesis Organization
    1.6 References
Chapter 2. Preparation of Graphitic Carbon Nitride/CoTPP Type-Ⅱ Heterostructureswith Significantly Enhanced Photocatalytic Hydrogen Evolution
    2.1 Introduction
    2.2 Experimental Details
        2.2.1 Chemicals and Materials
        2.2.2 Preparation of Photocatalyst
        2.2.3 Materials Characterizations
        2.2.4 Photocatalytic Hydrogen Production Experiment
    2.3 Results and Discussion
    2.4 Summary
    2.5 References
Chapter 3. Developing Novel g-C_3N_4/NPBIm Type-Ⅱ Heterostructures SignificantlyEnhance Visible Photocatalytic Hydrogen Production from Water Splitting
    3.1 Introduction
    3.2 Experimental Details
        3.2.1 Chemicals and Materials
        3.2.2 Preparation of Photocatalysts
        3.2.3 Materials Characterizations
        3.2.4 Photocatalytic Hydrogen Production Experiment
    3.3 Results and Discussion
    3.4 Summary
    3.5 References
Chapter 4. Developing Novel g-C_3N_4/CoBP Nanocomposites with Significantly EnhanceVisible-Light Photocatalytic Hydrogen Production from Water Splitting
    4.1 Introduction
    4.2 Experimental Details
        4.2.1 Chemicals and Materials
        4.2.2 Preparation of Photocatalysts
        4.2.3 Materials Characterizations
        4.2.4 Photocatalytic Hydrogen Production Experiment
    4.3 Results and Discussion
    4.4 Summary
    4.5 References
Chapter 5. Conclusions and Recommendations
    5.1 Summary of Dissertation
    5.2 Future work
Acknowledgement
List of Publications


【参考文献】：
期刊论文
[1]Recent Advances of Graphitic Carbon Nitride-Based Structures and Applications in Catalyst, Sensing, Imaging, and LEDs[J]. Aiwu Wang,Chundong Wang,Li Fu,Winnie Wong-Ng,Yucheng Lan.  Nano-Micro Letters. 2017(04)
[2]Ferrites boosting photocatalytic hydrogen evolution over graphitic carbon nitride: a case study of（Co, Ni）Fe2O4 modification[J]. Jie Chen,Daming Zhao,Zhidan Diao,Miao Wang,Shaohua Shen.  Science Bulletin. 2016(04)



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