Novel phosphorus doped carbon nitride modified TiO2 nanotube arrays with improved photoelectrochemical performance

Nanoscale ◽  
2015 ◽  
Vol 7 (39) ◽  
pp. 16282-16289 ◽  
Author(s):  
Jingyang Su ◽  
Ping Geng ◽  
Xinyong Li ◽  
Qidong Zhao ◽  
Xie Quan ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Tio2 Nanotube Arrays ◽  
Graphitic Carbon ◽  
Tio2 Nanotube ◽  
Graphitic Carbon Nitride ◽  
Nanotube Arrays ◽  
Photoelectrochemical Performance ◽  
Vertically Aligned ◽  
Phosphorus Doped

Novel phosphorus-doped graphitic-carbon nitride (P-C3N4) modified vertically aligned TiO2 nanotube arrays (NTs) were designed and synthesized.

scholarly journals Vertically Aligned Binder-Free TiO2 Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2924
Author(s):  
Suriyakumar Dasarathan ◽  
Mukarram Ali ◽  
Tai-Jong Jung ◽  
Junghwan Sung ◽  
Yoon-Cheol Ha ◽  
...  
Keyword(s):  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Electrochemical Anodization ◽  
Nanotube Arrays ◽  
Kinetic Properties ◽  
Outer Diameter ◽  
Impregnation Method ◽  
Binder Free ◽  
Vertically Aligned ◽  
Discharge Capacities

Vertically aligned Fe, S, and Fe-S doped anatase TiO2 nanotube arrays are prepared by an electrochemical anodization process using an organic electrolyte in which lactic acid is added as an additive. In the electrolyte, highly ordered TiO2 nanotube layers with greater thickness of 12 μm, inner diameter of approx. 90 nm and outer diameter of approx. 170 nm are successfully obtained. Doping of Fe, S, and Fe-S via simple wet impregnation method substituted Ti and O sites with Fe and S, which leads to enhance the rate performance at high discharge C-rates. Discharge capacities of TiO2 tubes increased from 0.13 mAh cm−2(bare) to 0.28 mAh cm−2 for Fe-S doped TiO2 at 0.5 C after 100 cycles with exceptional capacity retention of 85 % after 100 cycles. Owing to the enhancement of thermodynamic and kinetic properties by doping of Fe-S, Li-diffusion increased resulting in remarkable discharge capacities of 0.27 mAh cm−2 and 0.16 mAh cm−2 at 10 C, and 30 C, respectively.

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