title: Designing Au Surface-Modified Nanoporous-Single-Crystalline SrTiO3 to Optimize Diffusion of Surface Plasmon Resonance-Induce Photoelectron toward Enhanced Visible-Light Photoactivity.
abstract: Nanoporous single-crystalline SrTiO3 is fabricated at a low temperature of 60 °C via a novel approach of sol-gel alkali-dissolution-exothermal reaction. The plasmon-active metal Au is loaded on the nanoporous single-crystalline SrTiO3 material to construct a new kind of plasmonic photocatalyst. Due to the single-crystalline nature and the space confinement effect of pores for Au growing, not only the promoted diffusion efficiency of surface plasmon resonance (SPR)-induce photoelectron is achieved, but also the diffusion region are well optimized via changing the loading amount of Au. Therefore, an optimal sample with 4.8 wt % Au loading exhibits a more than 40-fold photoactivity enhancement under visible-light irradiation compared to the common nanosized SrTiO3 (a commercially available sample) loaded with 5.3 wt % Au which was prepared under the same condition. Furthermore, combining the special nanostructure of Au surface-modified nanoporous-single-crystalline SrTiO3 with photocatalytic properties, estimation of the diffusion mean free path of SPR-induce photoelectron can be achieved. This study proposes an alternative approach to enhance the photoactivity of plasmonic photocatalyst via fine designing the semiconductor substrate.
authors.affiliation: TU-NIMS Joint Research Center, School of Material Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.
authors.forename: Da
authors.initials: D
authors.lastname: Lu
authors.affiliation: TU-NIMS Joint Research Center, School of Material Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.|Tianjin Key Laboratory of Composite and Functional Materials, and Key Lab of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin 300072, People's Republic of China.
authors.forename: Shuxin
authors.initials: S
authors.lastname: Ouyang
authors.affiliation: TU-NIMS Joint Research Center, School of Material Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.|Tianjin Key Laboratory of Composite and Functional Materials, and Key Lab of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin 300072, People's Republic of China.
authors.forename: Hua
authors.initials: H
authors.lastname: Xu
authors.affiliation: TU-NIMS Joint Research Center, School of Material Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.
authors.forename: Dewang
authors.initials: D
authors.lastname: Li
authors.affiliation: TU-NIMS Joint Research Center, School of Material Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.
authors.forename: Xueliang
authors.initials: X
authors.lastname: Zhang
authors.affiliation: TU-NIMS Joint Research Center, School of Material Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.
authors.forename: Yunxiang
authors.initials: Y
authors.lastname: Li
authors.affiliation: TU-NIMS Joint Research Center, School of Material Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.|Tianjin Key Laboratory of Composite and Functional Materials, and Key Lab of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin 300072, People's Republic of China.|International Center for Materials Nanoarchitectonics (WPI-MANA) and Environmental Remediation Materials Unit, National Institute for Materials Science (NIMS) , Tsukuba 305-0047, Japan.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Ye
keywords: Au; SrTiO3; isopropyl alcohol photodegradation; nanoporous single-crystalline material; plasmonic photocatalysis