首页|Design and synthesis of a combined meso-adsorbent/chemo-sensor for extraction and detection of silver ions
Design and synthesis of a combined meso-adsorbent/chemo-sensor for extraction and detection of silver ions
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
We synthesized a new pH-dependent meso-captor/sensor for the visual monitoring and selective sequestering of Ag(I) ions from wastewater. The SBA-16 microspheres were successfully synthesized via a direct hydrothermal treatment through surfactant-assisted cooperative self-assembly. The meso-captor/sensor was designed via the direct immobilization of the chromogenic Acid Blue 90 (AB90) chelate into cubical large, open mesoporous SBA-16 carriers and investigate of its ability to detect and retain silver ions from aqueous solutions. Results show that the synthesized SBA-16 microspheres were retained after modification and the AB90 functional groups were immobilized hierarchically inside the mesopore channels. This was evidenced by the N-2 adsorption, X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM), High-Resolution Transmission Electron Microscope (HR-TEM), and elemental analyses. Batch adsorption experiments were carried out and the effects of various parameters on Ag(I) ions removal and detection were determined. The optimum adsorption/detection of Ag(I) ions were recorded at a pH of 6.2 within 30 min with color change from a brilliant blue to a pale blue-gray. The spectral response for [SBA-16@AB90 -> Ag(I)] complex showed a maximum reflectance at lambda(max) = 385 nm within 2.5 min response time (t(R)); the LOD was close to 3.87 mu g/L while the LOQ approached 12.83 mu g/L, this was attributed to the concentration range at which a linear signal has been observed against Ag(I) analyte concentration (i.e., 5 to 1000 mu g/L) at pH 6.2 with standard deviation (SD) of 0.077 (RSD% = 9.5 at n = 8). (c) 2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier
