Facile fabrication of chitosan-calcium carbonate nanowall arrays and their use as a sensitive non-enzymatic organophosphate pesticide sensor
Facile fabrication of chitosan-calcium carbonate nanowall arrays and their use as a sensitive non-enzymatic organophosphate pesticide sensor
复制标题
壳聚糖-碳酸钙纳米墙阵列的简便制造及其作为敏感非酶有机磷农药传感器的用途
DOI：
10.1039/c1nr10286a
复制
发表时间：
2011-01-01
期刊：
影响因子：
6.7
通讯作者：
Zhang, Lizhi
中科院分区：
文献类型：
--
作者：
Gong, Jingming;Zhang, Wei;Zhang, Lizhi
采用一步电沉积法在阴极基底上制备了新型的CaCO 3-壳聚糖（CaCO 3-chi）纳米阵列。结果表明，壳聚糖在纳米阵列的形成中起着重要的作用。观察到独立的良好排列的CaCO 3-chi-nallarrays均匀分布在整个基板上，横向尺寸为微米级，平均孔径为400 nm。所形成的CaCO 3-chi-chi-chi-chi-all阵列具有交错的多孔网络结构、大的表面积和开放的边界，在捕获有机磷农药（OP）方面是高效的。结合溶出伏安法，将制备的CaCO 3-壳聚糖阵列用于固相萃取（SPE），构建了高灵敏度的非酶OPs传感器。方法的检出限为0.8ng/mL（-1）（S/N = 3）。由新型CaCO 3-chi-nitrile阵列制成的传感器具有良好的重现性和可接受的稳定性。本工作不仅为CaCO_3-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-ch
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.