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Visible light photoelectrocatalysis with salicylic acid-modified TiO2 nanotube array electrode for p-nitrophenol degradation

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Abstract.
This research focused on immersion method synthesis of visible light active salicylic acid (SA)-modified
TiO2 nanotube array electrode and its photoelectrocatalytic (PEC) activity. The SA-modified TiO2 nanotube
array electrodewas synthesized by immersing in SA solution with an anodized TiO2 nanotube array electrode.
Scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy
(XPS), infrared spectroscopy (IR), UV–vis diffuse reflectance spectrum (DRS), and Surface photovoltage
(SPV) were used to characterize this electrode. It was found that SA-modified TiO2 nanotube array
electrode absorbed well into visible region and exhibited enhanced visible light PEC activity on the
degradation of p-nitrophenol (PNP). The degradation efficiencies increased from 63 to 100% under UV
light, and 79–100% under visible light ( y > 400 nm), compared with TiO2 nanotube array electrode. The
enhanced PEC activity of SA-modified TiO2 nanotube array electrode was attributed to the amount of
surface hydroxyl groups introduced by SA-modification and the extension of absorption wavelength
range.

Keywords:
TiO2 nanotube
Salicylic acid
Photoelectrocatalysis
Nitrophenol
Modification

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 166 (2009) 547–552

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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