Synthesis of N doped titania nanotube arrays photoanode using urea as nitrogen precursor for photoelectrocatalytic application

Tiur Elysabeth, Slamet, Athiek Sri Redjeki

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

Addition of urea as nitrogen precursor during synthesis of TiO 2 nanotube arrays photocatalyst has been investigated. This study aimed to increase the visible light photo response of TiO 2 by applying nitrogen doped titania nanotube arrays (N-TNTAs) for photoanode preparation in the photoelectrocatalytic process. Nitrogen doped titania nanotube arrays (N-TNTAs) was synthesized by a one-step electrochemical anodization method at 50 V for 2 hour, in the electrolyte solution containing water, ammonium fluoride, glycerol and specified amounts of urea as nitrogen precursor followed by annealing at 500°C for 3 h to induce crystallization. Amount of urea (0.1, 0.2 and 0.4 wt%) in electrolyte solution and annealing atmosphere (air and N2) were varied to enhance visible light photo response. SEM analysis showed that TNTAs and N-TNTAs were successfully synthesized with diameters of 64-320 nm but the morphologies did not show a significant difference. The XRD results showed an identical pattern dominated by the anatase phase. The size of N-TNTAs crystallite is larger than the undoped TNTAs. UV-DRS analysis showed that N-TNTAs have smaller bandgap energy. The smallest bandgap energy was obtained 2.84 eV from N-TNTAs using 0.2% urea with N2 gas annealing (N-TNTAs 0.2% U-N2). Measurement of photocurrent density showed better activity under visible light with smaller bandgap energy.

Original languageEnglish
Article number012144
JournalIOP Conference Series: Materials Science and Engineering
Volume509
Issue number1
DOIs
Publication statusPublished - 3 May 2019
Event13th Joint Conference on Chemistry, JCC 2018 - Semarang, Indonesia
Duration: 7 Sep 20188 Sep 2018

Keywords

  • nitrogen doping
  • nitrogen precursor
  • photoelectrocatalytic
  • Titania nanotube

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