A simple strategy to incorporate Pt into TiO2 nanosponges via wet oxidation of multilayered films

作者：Zuruzi Abu Samah^*; Nurmawati Muhammad Hanafiah; Yeo Yong Hwee; Wu Shixin; Lai Patrick Chee Hoong; Chen Zhong

来源：RSC Advances, 2013, 3(43): 19971-19977.

DOI：10.1039/c3ra41162a

Addition of noble metals has been shown to enhance the properties of TiO2 for a wide range of applications. Methods to incorporate Pt into TiO2 usually involve the use of chloride-containing precursors. Here we present an alternative chloride-free method to incorporate Pt through aqueous oxidation of multilayered Ti/Pt/Ti films in a simple manner. In this contribution, we demonstrate this route using sputtered Ti/Pt/Ti films either in blanket layer or micrometer scale features patterned using lithography. A mechanism for Pt incorporation into TiO2 based on formation of Pt hydroxides is proposed. We demonstrate the utility of this technique to incorporate Pt into TiO2 nanosponges by constructing prototype sensors which exhibit a faster response time and a current increase of 2 orders of magnitude larger than sensors using pristine TiO2 nanosponges. This method is a simple route to integrate Pt-modified TiO2 (Pt-TiO2) nanosponge features into devices such as lab on a chip and integrated power sources.

• 出版日期2013
• 单位南阳理工学院