| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8025893 | Surface and Coatings Technology | 2015 | 9 Pages |
Abstract
Well-dispersed Pt quantum dots (QDs) with an average diameter of 2Â nm were homogeneously decorated on TiO2 nanotube arrays (TNTAs) by a modified photo irradiation-reduction method. The effect of the precursor concentration between 0.3Â mM and 2.0Â mM on the decorated Pt QD content was investigated. The synthesized nanostructures with different Pt QD contents were characterized by XRD, SEM, TEM, XPS, UV-vis and PL. The Pt QDs, acting as electron sinks, reduced the recombination of electrons and holes and extended their lifetime, leading to a greatly enhanced photocatalytic performance. In a 1.0Â mM concentration, the fabricated nanocomposite with excellent durability exhibited favorable photocurrent density and efficiency of degrading Rhodamine B. According to EPR analysis, the corresponding mechanism of the UV-driven photocatalytic process is proposed. Furthermore, the nanocomposite is easier to be recycled compared to the powder catalysts.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Yanfei Wang, Yuxiang Zhu, Xiaoyu Zhao, Xu Yang, Xianchao Li, Zhi Chen, Libin Yang, Liang Zhu, Tong Gao, Zuoliang Sha,