期刊
NANOSCALE
卷 3, 期 8, 页码 3123-3131出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1nr10286a
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资金
- National Science Foundation of China [20803026]
- Natural Science Foundation of Hubei Province [2008CDB032]
- Colleges' Basic Research and Operation of MOE [CCNU10A01006]
- Program for Innovation Team of Hubei Province [2009CDA048]
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 similar to 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.
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