Enhancing the photoelectrochemical response of TiO2 nanotubes through their nanodecoration by pulsed-laser-deposited Ag nanoparticles
Enhancing the photoelectrochemical response of TiO2 nanotubes through their nanodecoration by pulsed-laser-deposited Ag nanoparticles
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DOI：
10.1063/1.4998439
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发表时间：
2017-08
影响因子：
3.2
通讯作者：
K. Trabelsi;A. Hajjaji;M. Gaidi;B. Bessais;M. Khakani
中科院分区：
文献类型：
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作者：
K. Trabelsi;A. Hajjaji;M. Gaidi;B. Bessais;M. Khakani
我们报道了基于脉冲激光沉积(PLD)的纳米二氧化钛(TiO2)纳米管阵列(NTA)的银纳米颗粒(NPs)修饰。我们主要研究了银靶的激光烧蚀脉冲数对Ag-NPs的平均尺寸和Ag-NP修饰的TiO2NT基光阳极光电转换效率的影响。通过改变负载量，我们不仅能够控制PLD沉积的银纳米颗粒的尺寸从20 nm到∼50 nm，而且还可以增加银纳米颗粒对TiO2NTAs的表面覆盖率。PLD沉积在石英衬底上的Ag-NPs的表面等离子体共振峰的红移证实了其尺寸随着NLP从500增加到10000而增大。用线性扫描循环伏安法研究了银纳米颗粒修饰的纳米二氧化钛的光电化学性能，发现纳米银修饰纳米二氧化钛在紫外可见光照射下产生的光电流对纳米银修饰纳米二氧化钛的大小和大小具有很强的敏感性。
We report on the pulsed laser deposition (PLD) based nanodecoration of titanium dioxide (TiO2) nanotube arrays (NTAs) by Ag nanoparticles (NPs). We focus here on the investigation of the effect of the number of laser ablation pulses (NLP) of the silver target on both the average size of the Ag-NPs and the photoelectrochemical conversion efficiency of the Ag-NP decorated TiO2-NT based photoanodes. By varying the NLP, we were able to not only control the size of the PLD-deposited Ag nanoparticles from 20 to ∼50 nm, but also to increase concomitantly the surface coverage of the TiO2 NTAs by Ag-NPs. The red-shifting of the surface plasmon resonance peak of the PLD-deposited Ag-NPs deposited onto quartz substrates confirmed the increase of their size as the NLP is increased from 500 to 10 000. By investigating the photo-electrochemical properties of Ag-NP decorated TiO2-NTAs, by means of linear sweep cyclic voltammetry under UV-Vis illumination, we found that the generated photocurrent is sensitive to the size...