The "Midas Touch" Transformation of TiO2 Nanowire Arrays during Visible Light Photoelectrochemical Performance by Carbon/Nitrogen Coimplantation

被引:97
作者
Song, Xianyin [1 ,2 ,3 ]
Li, Wenqing [1 ,2 ,3 ]
He, Dong [1 ,2 ,3 ]
Wu, Hengyi [1 ,2 ,3 ]
Ke, Zunjian [1 ,2 ,3 ]
Jiang, Changzhong [1 ,2 ,3 ]
Wang, Gongming [4 ]
Xiao, Xiangheng [1 ,2 ,3 ]
机构
[1] Wuhan Univ, Dept Phys, Inst Technol Sci, Wuhan 430072, Hubei, Peoples R China
[2] Wuhan Univ, Key Lab Artificial Micro & Nanostruct, Minist Educ, Hubei Nucl Solid Phys Key Lab,Inst Technol Sci, Wuhan 430072, Hubei, Peoples R China
[3] Wuhan Univ, Ctr Ion Beam Applicat, Inst Technol Sci, Wuhan 430072, Hubei, Peoples R China
[4] Univ Sci & Technol China, Sch Chem & Mat Sci, Anhua 230026, Anhui, Peoples R China
基金
中国国家自然科学基金;
关键词
photoelectrochemical water splitting; TiO2; nanowires; visible light photoactivity; TITANIUM-DIOXIDE; HYDROGEN-PRODUCTION; ION-IMPLANTATION; SOLAR ABSORPTION; WATER; PHOTOCATALYST; ANATASE; RUTILE; NANOTUBES; NANOSTRUCTURES;
D O I
10.1002/aenm.201800165
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
Titanium dioxide is a promising photoanode material for water oxidation, but it is substantially limited by its poor efficiency in the visible light range. Herein, an innovative carbon/nitrogen coimplantation method is utilized to realize the Midas touch transformation of TiO2 nanowire (NW) arrays for photoelectrochemical (PEC) water splitting in visible light. These modified golden-yellow rutile TiO2 NW arrays (C/N-TiO2) exhibit remarkably enhanced absorption in visible light regions and more efficient charge separation and transfer. As a result, the photocurrent density of carbon/nitrogen co-implanted TiO2 under visible light (>420 nm) can reach 0.76 mA cm(-2), which far exceeds the value of 3 mu A cm(-2) seen for pristine TiO2 nanowire arrays at 0.8 V versus Ag/AgCl. An incident photon to electron conversion efficiency of approximate to 14.8% is achieved at 450 nm on C/N-TiO2 without any other cocatalysts. The ion implantation doping approach, combined with codoping strategies, is proved to be an effective strategy for enhancing the photoelectrochemical conversion and can enable further improvement of the PEC water-splitting performance of many other semiconductor photoelectrodes.
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页数:8
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