Department of Chemistry, Supercritical Fluid Centre and Materials Section, University College Cork, Cork, Ireland.
J Colloid Interface Sci. 2012 Mar 1;369(1):330-7. doi: 10.1016/j.jcis.2011.11.063. Epub 2011 Dec 13.
This study examines the synthesis of SBA-15 with tailored pore sizes through controlled thermal treatment for the adsorption of Pb and Cd ions. The aim is to produce a material that can adsorb heavy metals at both high and low concentrations. The materials were characterised by means of N(2) physisorption, powder X-ray diffraction (PXRD), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), microanalysis and transmission electron microscopy (TEM). The surface areas ranged from 410 to 871 m(2)g(-1), and pore diameter was increased from 5.9 to 10.8 nm. This method allows for maximum adsorption of metal ions at very low concentrations. Metal ion adsorption was determined using an Atomic Absorption Spectrophotometer. The effects of pH were found to play a major role in the precipitation and, therefore, adsorption of metal ions. This method proved to be efficient at adsorbing large quantities of both metals (39 and 41 mg g(-1) for Pb and Cd, respectively).
本研究通过控制热处理合成了具有特定孔径的 SBA-15，用于吸附 Pb 和 Cd 离子。目的是制备一种能够在高浓度和低浓度下吸附重金属的材料。通过氮气物理吸附、粉末 X 射线衍射（PXRD）、漫反射红外傅里叶变换光谱（DRIFTS）、微分析和透射电子显微镜（TEM）对材料进行了表征。比表面积范围为 410 至 871 m(2)g(-1)，孔径从 5.9 增加到 10.8nm。该方法可实现极低浓度下金属离子的最大吸附。使用原子吸收分光光度计测定金属离子的吸附。发现 pH 值的影响在金属离子的沉淀和吸附中起主要作用。该方法在吸附大量金属方面表现出较高的效率（分别为 Pb 和 Cd 的 39 和 41 mg g(-1)）。
