NDLI: Facile fabrication of chitosan–calcium carbonate nanowall arrays and their use as a sensitive non-enzymatic organophosphate pesticide sensor

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Lizhi Gong, Jingming Zhang, Wei Liu, Ting
Copyright Year	2011
Abstract	Novel nanowall arrays of CaCO3–chitosan (CaCO3–chi) were deposited onto a cathodic substrate by a facile one-step electrodeposition approach. Results demonstrate that chitosan plays an important role in the formation of nanowall arrays. Freestanding well-aligned CaCO3–chi nanowall arrays were observed to be uniformly distributed over the whole substrate with a lateral dimension in the micrometre size and an average pore size of ∼400 nm. The as-formed CaCO3–chi nanowall arrays featuring interlaced porous network architecture, large surface area, and open boundaries, are highly efficient in the capture of organophosphate pesticides (OPs). Combined with stripping voltammetry, a highly sensitive non-enzymatic OPs sensor was fabricated using the prepared CaCO3–chi nanowall arrays for solid phase extraction (SPE). The detection limit for methyl parathion (MP) in aqueous solutions was determined to be 0.8 ng mL−1 (S/N = 3). The resulting sensor made of novel CaCO3–chi nanowall arrays exhibits good reproducibility and acceptable stability. This work not only provides a facile and effective route for the preparation of CaCO3–chi nanowall arrays, but also offers a new promising protocol for OPs analysis.
Starting Page	3123
Ending Page	3131
Page Count	9
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	3
Issue Number	8
Journal	Nanoscale
DOI	10.1039/c1nr10286a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Solid phase extraction Organophosphate Micrometre Parathion methyl Voltammetry Chitosan Electroplating
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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