Combining the UV-switchability of Keggin ions with a galvanic replacement process to fabricate TiO2-polyoxometalate-bimetal nanocomposites for improved surface enhanced raman scattering and solar light photocatalysis.
Combining the UV-switchability of Keggin ions with a galvanic replacement process to fabricate TiO2-polyoxometalate-bimetal nanocomposites for improved surface enhanced raman scattering and solar light photocatalysis.
复制标题
将 Keggin 离子的紫外线可切换性与电偶置换工艺相结合，制造 TiO2-多金属氧酸盐-双金属纳米复合材料，以改善表面增强拉曼散射和太阳光光催化。
DOI：
10.1021/am401252h
复制
发表时间：
2013
影响因子：
9.5
通讯作者：
V. Bansal
中科院分区：
文献类型：
--
作者：
A. Pearson;S. Bhosale;S. Bhargava;V. Bansal
虽然用金属纳米颗粒装饰TiO 2表面已经得到了很好的建立，但迄今为止尚未研究过沉积到TiO 2表面上的金属纳米颗粒的组合物的改性以及这种表面增强拉曼散射（Sers）和拉曼散射的拉曼系统的适用性。在这项工作中，我们，第一次，联合收割机的Keggin离子的12-磷钨酸（PTA），直接形成金属纳米粒子（银和铜）到胶体二氧化钛表面上，与电流置换过程将这些预沉积的金属纳米粒子转化为银系统（银/Au，银/铂，铜/Au，铜/铂，铜/银）。我们进一步证明了这些新的TiO 2-聚氧乙烯-聚氧乙烯纳米复合材料对改善Sers和太阳光散射的适用性。
While the decoration of TiO2 surfaces with metal nanoparticles has been well-established, the modification of the composition of metal nanoparticles postdeposition onto TiO2 surfaces and applicability of such bimetallic systems for surface enhanced Raman scattering (SERS) and photocatalysis has not hitherto been investigated. In this work, we, for the first time, combine the unique UV-switchability of the Keggin ions of 12-phosphotungstic acid (PTA) to directly form metal nanoparticles (Ag and Cu) onto the colloidal TiO2 surface, with a galvanic replacement process to convert these predeposited metal nanoparticles into bimetallic systems (Ag/Au, Ag/Pt, Cu/Au, Cu/Pt, and Cu/Ag). We further demonstrate the applicability of these novel TiO2-polyoxometalate-bimetal nanocomposites toward improved SERS and solar light photocatalysis.