e-journal

Self-Organized Anodic TiO2 Nanotube Arrays Functionalized by Iron Oxide Nanoparticles

---

Surface functionalization of self-organized TiO2 nanotube (NT) arrays produced by electrochemical
anodization is implemented by dextrin-coated iron-oxide nanoparticles leading to a composite semiconductor
nanostructure. The morphological and structural properties are studied by electron and atomic force
microscopy, X-ray diffraction, X-ray photoelectron, and resonance micro-Raman spectroscopies revealing
successful deposition of maghemite (γ-Fe2O3) nanoparticles on the nanotube walls. The nanocomposite
surface simultaneously exhibits high photocatalytic activity for the degradation of model pollutants under
UV irradiation at relatively low loading levels of the γ-Fe2O3 nanoparticles and light-independent wetting
properties, as the initially superhydrophilic surface is converted to a moderately hydrophilic substrate,
while obtaining an additional functionality through the magnetic field response of the iron-oxide component
that shows appreciable magnetization anisotropy. Electrochemical impedance investigation including
Mott-Schottky analysis attests to a significant improvement of the interfacial electron-transfer kinetics
together with a modification of the surface chemistry for the functionalized TiO2 nanotubes, promoting
electron-hole separation through the polyhydroxyl dextrin shell that mediates charge transfer between
the constituent semiconductor oxides and validating their improved photocatalytic performance. These
composite nanotubular materials offer the opportunity of advanced applications, where the unique
photoinduced reactivity, the controlled wetting behavior, and the magnetic field response can be effectively
combined.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Chemistry of Materials

No. Panggil

-

Penerbit

Washington, DC : American Chemical Society., 2009

Deskripsi Fisik

Chem. Mater. 2009, 21, 662–672

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar