Publication:
Fabrication and gas sensing properties of C-doped and un-doped TiO2 nanotubes

Placeholder

Program

KU Authors

Co-Authors

Sennik, Erdem
Işık, Müge
Ahsen, Ali Şems
Öztürk, Osman
Öztürk, Zafer Ziya

Advisor

Publication Date

2014

Language

English

Type

Journal Article

Journal Title

Journal ISSN

Volume Title

Abstract

In this work, un-doped and carbon (C) doped TiO2 nanotubes were fabricated and their hydrogen sensing properties were investigated. A Ti foil was anodized in an aqueous hydrofluoric acid (H:F) electrolyte (0.5 wt%) at room temperature to form TiO2 nanotube arrays. C-doped TiO2 nanotubes were obtained through two methods; a chemical process and thermal acetylene (C2H2) treatment. In the chemical method, a Ti foil was anodized 'in-situ' in aqueous solution of 0.5 wt% polyvinyl alcohol (PVA)+0.5 wt% HF. In the heat treatment method, a Ti foil was anodized in an aqueous (HF) electrolyte (0.5 wt%) to obtain TiO2 nanotubes, and then C-doped TiO2 nanotubes were obtained by heating as-prepared nanotubes at 500 degrees C in a quartz tube under a continuous N-2 and C2H2 flux (1:1). The obtained un-doped and C-doped TiO2 nanotubes were characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS). The H-2 sensing properties of the nanotubes exposed to 5000 ppm H-2 were investigated at 100 degrees C. C-doped TiO2 nanotubes showed a lower response to H-2 than the undoped TiO2 nanotubes.

Description

Source:

Ceramics International

Publisher:

Elsevier

Keywords:

Subject

Materials science, Ceramics

Citation

Endorsement

Review

Supplemented By

Referenced By

Copy Rights Note

0

Views

0

Downloads

View PlumX Details