Enhanced photocatalytic H2 evolution by plasmonic and piezotronic effects based on periodic Al/BaTiO3 heterostructures

被引:132
作者
Guo, Limin [1 ,2 ,3 ]
Zhong, Caifu [4 ]
Cao, Jinqing [1 ,2 ]
Hao, Yanan [1 ]
Lei, Ming [1 ]
Bi, Ke [1 ]
Sun, Qijun [2 ,3 ]
Wang, Zhong Lin [2 ,3 ,5 ]
机构
[1] Beijing Univ Posts & Telecommun, Sch Sci, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100083, Peoples R China
[3] Univ Chinese Acad Sci, Sch Nanosci & Technol, Beijing 100049, Peoples R China
[4] Chinese Acad Macroecon Res, Natl Dev & Reform Commiss, Beijing 100038, Peoples R China
[5] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
基金
中国国家自然科学基金;
关键词
Al/BaTiO3; heterostructure; Plasmonic photocatalysis; Piezotronic effect; H-2; evolution; Localized surface plasmon resonance; PIEZO-CATALYST; EFFICIENT; NANOCOMPOSITE; DEGRADATION; OXIDATION; GLYCEROL; MATRIX; MOS2; DARK;
D O I
10.1016/j.nanoen.2019.05.067
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
Plasmonic catalysis of solar water splitting has been extensively exploited these years for the fast-growing energy demands and environmental friendliness. However, most of the plasmonic systems are restricted on the noble metals and semiconductors, which limited the cost efficiency of the photocatalysts and further investigations of metal plasmons coupling with other research filed. Herein, we presented nonprecious Al@BaTiO3 (Al/BTO) plasmonic heterostructures on Ti foams for a synergistic piezo-photocatalytic water splitting and pollutant degradation. An impressive local surface plasmon resonance (LSPR) and solar energy harvesting ability (in the ultraviolet-visible light region) are achieved on the Al/BTO photoelectrode, which endow the heterostructure with an excellent solar H-2 evolution (327 mu mol h(-1) cm(-2)) and 4-nitrophenol (4-NP) degradation rate. Furthermore, the BTO substrates upon magnetic field induced mechanical stimuli provide a strong polarization potential to the plasmonic catalyst by significantly enhancing the photo-generated carrier separation and transfer. The synergistic piezo-photocatalysis exhibited almost 50% increase in the H-2 production (657 mu mol h(-1) cm(-2)) and decolourization of 4-NP, which is comparable to a traditional noble metallic plasmonic photoelectrode. The hybrid catalyst delivers a long-term durability in the cycling tests, maintaining similar to 90% of the activity after 30 h. This work demonstrates that non-noble metallic plasmons and piezoelectronic effect can serve synchronously as highly active photocatalytic agents, which not only boost the solar energy conversion efficiency but also decrease the material cost.
引用
收藏
页码:513 / 520
页数:8
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