Synthesis of Boron-doped TiO2 nanotube in NH4BF4 based electrolyte and investigating dopant effect: Insight into the Geometrical structure and photoelectrochemical activity
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1Fouman Faculty of Engineering, College of Engineering, University of Tehran,Fouman 43516-66456, Iran
2Fouman Faculty of Engineering, College of Engineering, University of Tehran, P.O. Box 43515-1155, 43516-66456, Iran.
3University of Tehran
Boron atoms were introduced to Titania nanotubes (TNTs) lattice through 2–step anodizing in a new NH4BF4 containing electrolyte to gain a high generation of photocharge carrier as well as high photoelectrocatalytic efficiency in boron doped TiO2 nanotubes (BTNTs). Morphology, crystalline phase, elemental composition, optical properties and photoelectrochemical features of synthesized TNTs were characterized by SEM, XRD, EDX, DRS and voltammetry analysis, respectively. The obtained results revealed that boron doping content led to the formation of smaler nanotubes with narrower band gap. Based on PEC measurments boron doping has a significant impact on the photoelectrochemical performance of synthesized samples, so that boron doping led to the amplification of photocurrent density from 0.19 to 0.67 mA/cm2. Consequently, the TNTs and BTNTs samples degrade 79% and 100% of methylene blue under 3h UV radiation, respectively.