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Biomimetic polymerization of aniline using hematin supported on halloysite nanotubes

Paper ID Volume ID Publish Year Pages File Format Full-Text
42052 45908 2010 7 PDF Available
Title
Biomimetic polymerization of aniline using hematin supported on halloysite nanotubes
Abstract

Halloysite is a very interesting naturally occurring aluminosilicate, which has received great attention due to its nanotube shape. We used this nanostructured material as support for hematin, a biomimetic catalyst, which was successfully employed for the aniline polymerization. The adsorption of hematin (Heme) on the halloysite nanotubes (HNTs) was confirmed by UV–vis spectroscopy, zeta potential measurements, thermal analysis and X-ray diffraction. The resulting HNTs/Heme/PANi nanocomposites were characterized by transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). UV–vis and FTIR confirmed the formation of the conjugated form of polyaniline (PANi). Electrical conductivity of the HNTs/Heme/PANi nanocomposites was in the order of 8.8 × 10−1 S/cm. This work shows the use of a naturally occurring nanostructured material as support for biomimetic catalyst immobilization, opening possibilities for a large-scale and environmentally friendly polyaniline synthesis.

Graphical abstractThis work shows the use of a naturally occurring nanostructured silicate as support for hematin, a biomimetic catalyst, and its use for the aniline polymerization. This is an alternative method to chemical functionalization of hematin that also increases its catalytic activity in acidic environments, and opens the possibility for the large-scale and environmentally friendly polyaniline–silica nanocomposites.Figure optionsDownload full-size imageDownload high-quality image (104 K)Download as PowerPoint slide

Keywords
Biomimetic catalyst; Hematin; Polyaniline synthesis; Halloysite
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Biomimetic polymerization of aniline using hematin supported on halloysite nanotubes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 381, Issues 1–2, 15 June 2010, Pages 267–273
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us