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Comparative NO2-sensing in cobalt and metal-free porphyrin nanotubes.
Title Comparative NO2-sensing in cobalt and metal-free porphyrin nanotubes.
Authors Wang, Y.; Ma, P.; Song, F.; Yao, S.; Chen, C.; Zhu, P.
Journal J Colloid Interface Sci
DOI 10.1016/j.jcis.2016.11.028
Abstract

In the present study, the nanotubes of 5-(4-hydroxyphenyl)-10, 15, 20-tri(4-chlorophenyl) porphyrin (p-HTClPP) (1) and 5-(4-hydroxyphenyl)-10, 15, 20-tri(4-chlorophenyl) porphyrin cobalt (p-HTClPPCo) (2) were successfully prepared by using anodize alumina oxide (AAO) template method. The p-HTClPP and p-HTClPPCo nanotubes have been confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), electronic absorption spectra, fluorescence spectroscopy, fourier transform infrared spectroscopy (FT-IR), low-angle X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) techniques. Both p-HTClPPCo and p-HTClPP nanotubes showed excellent sensitivity, reproducibility and selectivity toward NO2. Especially the prepared sensor of p-HTClPPCo nanotubes exhibited faster response/recovery characteristics and lower detection limit of NO2 (up to 500ppb) than that of p-HTClPP nanotubes, which pave a new avenue in the gas sensitive field.