Surface Plasmon Resonance (SPR)-Triggered Polarization of BaTiO3 Surface on Ag Nanocubes Improves Photocatalysis

被引：3
作者：
Ma, Yanying [1 ]
Liu, Xiaoyun [2 ]
Xu, Yujiao [1 ]
Alves, Tiago V. [3 ]
Li, Mai [1 ]
Wang, Chunrui [1 ]
Camargo, Pedro H. C. [4 ]
Wang, Jiale [1 ,5 ]
机构：
[1] Donghua Univ, Coll Sci, Shanghai 201620, Peoples R China
[2] Donghua Univ, Res Ctr Anal & Measurement, Shanghai 201620, Peoples R China
[3] Univ Fed Bahia, Dept Fisico Quim, Inst Quim, Rua Barao Jeremoabo 147, BR-40170115 Salvador, BA, Brazil
[4] Univ Helsinki, Dept Chem, AI Virtasen Aukio 1, Helsinki 00014, Finland
[5] Donghua Univ, Shanghai Inst Intelligent Elect & Syst, Shanghai 201620, Peoples R China
来源：
CHEMPHOTOCHEM | 2024年 / 8卷 / 02期
基金：
中国国家自然科学基金;
关键词：
BaTiO3; surface plasmon resonance; photocatalysis; surface polarization; DISCRETE-DIPOLE APPROXIMATION; CATALYTIC-ACTIVITY; P-AMINOTHIOPHENOL; AU NANOPARTICLES; THIN-FILMS; DEGRADATION; ADSORPTION; CONVERSION; CHEMISTRY; SPECTRA;
D O I：
10.1002/cptc.202300200
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The surface plasmon resonance (SPR)-generated electric field (E-field) intensities around a Ag nanocube (NC) before and after it is covered by a BaTiO3 (BTO) layer (BTO@Ag NC) were calculated. It was observed that the theoretical E-field intensities were reduced on BTO@Ag NCs, thus suggesting inferior catalytic activities under visible light illumination. However, BTO@Ag NCs experimentally displayed better photocatalytic performance than that of Ag NCs under illumination at 633 nm, both in ambient argon (Ar) and in ambient air, where p-aminothiophenol (PATP) molecules were used to probe the conversion. The mechanism can be attributed to the surface polarization of the BTO layer trigged by a SPR effect of the Ag core. The oscillation of free electrons in the Ag core aroused appearance of surface polarization charge on the ferroelectric (FE) BTO surface, which resulted in the enhanced catalytic properties of BTO@Ag NCs. Therefore, our finding may provide a novel method to enhance visible-light responsive photocatalytic activity of wide bandgap FE materials by depositing them on plasmonic metal nanostructures.
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页数：6
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