ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Layer-by-Layer Self-Assembled Metal-Ion- (Ag-, Co-, Ni-, and Pd-) Doped TiO2 Nanoparticles: Synthesis, Characterisation, and Visible Light Degradation of Rhodamine B

Mahlambi, Mphilisi M and Mishra, Ajay K and Mishra, Shivani B and Raichur, Ashok M and Mamba, Bhekie B and Krause, Rui W (2012) Layer-by-Layer Self-Assembled Metal-Ion- (Ag-, Co-, Ni-, and Pd-) Doped TiO2 Nanoparticles: Synthesis, Characterisation, and Visible Light Degradation of Rhodamine B. In: JOURNAL OF NANOMATERIALS, 2012 .

[img]
Preview
PDF
jou_nan_mat_2012_2012.pdf - Published Version
Available under License Creative Commons Attribution.

Download (5MB) | Preview
Official URL: http://dx.doi.org/10.1155/2012/302046

Abstract

Metal-ion- (Ag, Co, Ni and Pd) doped titania nanocatalysts were successfully deposited on glass slides by layer-by-layer (LbL) self-assembly technique using a poly(styrene sulfonate sodium salt) (PSS) and poly(allylamine hydrochloride) (PAH) polyelectrolyte system. Solid diffuse reflectance (SDR) studies showed a linear increase in absorbance at 416 nm with increase in the number of m-TiO2 thin films. The LbL assembled thin films were tested for their photocatalytic activity through the degradation of Rhodamine B under visible-light illumination. From the scanning electron microscope (SEM), the thin films had a porous morphology and the atomic force microscope (AFM) studies showed ``rough'' surfaces. The porous and rough surface morphology resulted in high surface areas hence the high photocatalytic degradation (up to 97% over a 6.5 h irradiation period) using visible-light observed. Increasing the number of multilayers deposited on the glass slides resulted in increased film thickness and an increased rate of photodegradation due to increase in the availability of more nanocatalysts (more sites for photodegradation). The LbL assembled thin films had strong adhesion properties which made them highly stable thus displaying the same efficiencies after five (5) reusability cycles.

Item Type: Journal Article
Publication: JOURNAL OF NANOMATERIALS
Publisher: HINDAWI PUBLISHING CORPORATION
Additional Information: Copyright for this article belongs to Authors
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 05 Jul 2012 07:55
Last Modified: 05 Jul 2012 07:55
URI: http://eprints.iisc.ac.in/id/eprint/44779

Actions (login required)

View Item View Item