首页|Comparative chemical sensor for detection of chromium(Ⅵ)in aqueous solution
Comparative chemical sensor for detection of chromium(Ⅵ)in aqueous solution
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A process for purifying aqueous solutions containing heavy and toxic metals such as chromium(Cr)has been investi-gated.One of the extremely harmful pollutants in rivers and seawater is the heavy metal ions due to their direct im-pacts on human,animals and plants are hexavalent Cr(Ⅵ).Consequently,highly sensitive sensor to detect Cr is es-sential.Surface plasmon resonance(SPR)technique has attracted huge research interest in detecting heavy metals spe-cifically.In this study,three types of prism-based SPR sensor,gold(Au)/silver(Ag),Au/polyaniline(PANI)and Au/titanium dioxide(TiO2)nanostructured films,are investigated as potential sensing material to detect the presence of Cr(VI)ions in water.The base Au layer with thickness of 48.3 nm is deposited on a glass slide for all sensors.For Au/Ag,Au/PANI nanofibers and Au/TiO2 sensor films,the Cr(Ⅵ)concentration is varied from 1 ppm to 15 ppm with sensitivity of 0.270 °ppm-1,0.082 °ppm-1 and 0.039 °ppm-1,respectively.Based on these results,the Au/PANI nanofi-bers are the most sensitive to Cr(Ⅵ)among the tested sensing materials.
NETL
NSTL
万方数据
