金纳米粒子的尺寸和含量对Au/TiO_2纤维的紫外和可见光的光催化性能优化研究
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- 英文论文题名：Enhanced photocatalytic performance of Au/TiO_2 nanofibers by precisely manipulating the dosage and size of Au nanoparticles under ultraviolet and visible light
- 论文作者：冯聪 ; 余志超 ; 王新强 ; 朱陆益 ; 张光辉 ; 许东
- 英文论文作者：Cong Feng ; Zhichao Yu ; Xinqiang Wang ; Luyi Zhu ; Guanghui Zhang ; Dong Xu ; State Key Laboratory of Crystal Materials and Institute of Crystal Materials ; Shandong University
- 年：2016
- 作者机构：山东大学晶体材料国家重点实验室;山东大学晶体材料研究所;
- 论文关键词：二氧化钛 ; 纳米金 ; 光催化
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十七分会：光化学
- 语种：中文
- 分类号：O643.36;O614.123
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：141k
- 原文格式：D
- 会议级别：全国
摘要
在光催化应用中,TiO_2主要的缺点是其具有宽带隙和较高的载流子复合效率。为了解决以上问题,用金纳米粒子修饰二氧化钛的方法得到了很大的关注。在此,通过配体交换的方法将具有窄尺寸分布(直径为6 nm,16 nm,30 nm)的金纳米球均匀地负载在二氧化钛纤维的表面。实验证明,通过调节纳米金的含量和尺寸能有效提高Au/TiO_2异质结构纤维在紫外和可见光条件下的光催化效率。我们系统地研究了金纳米尺寸和含量对光催化效果的影响,证明了在紫外和可见光下金纳米颗粒的两种主要的特征(肖特基势垒和表面等离子共振)是提高光催化效率的主要原因。
The drawback to using TiO_2 in photocatalytic applications lies in the wide bandgap and high recombination rate of the charge carriers. To solve the above problem, modification of TiO_2 with gold nanoparticles has received considerable attention. Here, gold nanoparticles with a narrow size distribution(6nm, 16 nm, 30nm) uniformly deposited on the surface of TiO_2 nanofibers have been synthesized through a ligand-exchange method. We demonstrate that the photocatalytic activity of Au/TiO_2 heterostructured nanofibers can be effectively enhanced under ultraviolet(UV) and visible light irradiation by manipulating the size and dosage of decorated Au nanoparticles. The effect of metal dosage and size on the photocatalytic performance has been systematically investigated, which suggests that the two main characteristics of gold nanoparticles(namely, Schottky barrier and surface plasmon resonance) are the key factors under UV and visible light illumination.
The drawback to using TiO_2 in photocatalytic applications lies in the wide bandgap and high recombination rate of the charge carriers. To solve the above problem, modification of TiO_2 with gold nanoparticles has received considerable attention. Here, gold nanoparticles with a narrow size distribution(6nm, 16 nm, 30nm) uniformly deposited on the surface of TiO_2 nanofibers have been synthesized through a ligand-exchange method. We demonstrate that the photocatalytic activity of Au/TiO_2 heterostructured nanofibers can be effectively enhanced under ultraviolet(UV) and visible light irradiation by manipulating the size and dosage of decorated Au nanoparticles. The effect of metal dosage and size on the photocatalytic performance has been systematically investigated, which suggests that the two main characteristics of gold nanoparticles(namely, Schottky barrier and surface plasmon resonance) are the key factors under UV and visible light illumination.
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