Photodegradation Activity of Poly(ethylene oxide-b- ε-caprolactone)-Templated Mesoporous TiO₂ Coated with Au and Pt

Wei-Cheng Chu; Jeonghun Kim; Minjun Kim; Abdulmohsen Ali Alshehri; Yousef Gamaan Alghamidi; Khalid Ahmed Alzahrani; Yusuke Yamauchi; Victor Malgras; Shiao-Wei Ku

doi:10.1166/jnn.2020.18572

Photodegradation Activity of Poly(ethylene oxide-b- ε-caprolactone)-Templated Mesoporous TiO₂ Coated with Au and Pt

J Nanosci Nanotechnol. 2020 Aug 1;20(8):5276-5281. doi: 10.1166/jnn.2020.18572.

Authors

Wei-Cheng Chu¹, Jeonghun Kim², Minjun Kim³, Abdulmohsen Ali Alshehri⁴, Yousef Gamaan Alghamidi⁴, Khalid Ahmed Alzahrani⁴, Yusuke Yamauchi², Victor Malgras⁵, Shiao-Wei Ku¹

Affiliations

¹ Department of Materials and Optoelectronic Science, Center of Crystal Research, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.
² Key Laboratory of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
³ School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia.
⁴ Department of Chemistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
⁵ International Center for Young Scientists (ICYS) and International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.

PMID: 32126730
DOI: 10.1166/jnn.2020.18572

Abstract

Mesoporous TiO₂ films are synthesized through evaporation-induced self-assembly using poly(ethylene oxide-b-ε-caprolactone) diblock copolymers as a soft-template. Using small-angle X-ray scattering and scanning electron microscopy, we investigate the effect of the TiO₂/PEO-b-PCL ratio on the resulting nanoarchitectonic structure. After sputter-coating Au and Pt layers, these Au/TiO₂ and Pt/TiO₂ nanocomposite films display drastically enhanced photodegradation of rhodamine 6G under ultraviolet irradiation, due to the metal films inhibiting the rapid recombination of photogenerated charge carriers.

Publication types

Research Support, Non-U.S. Gov't