Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
J Hazard Mater. 2012 May 15;215-216:166-72. doi: 10.1016/j.jhazmat.2012.02.050. Epub 2012 Feb 24.
ZnO/SiO(2) gel composites with different active component loading were prepared by sol-gel method combined with ambient drying process, followed by thermal treatment. The gel composites were characterized by scanning electron microscopy (SEM), nitrogen adsorption, X-ray diffraction (XRD), FTIR and X-ray photoelectron spectroscopy (XPS), and their performances for H(2)S removal were evaluated by dynamic testing at room temperature. The as prepared materials exhibited high surface area with multimodal pore size distributions in micropore and mesopore region. The porous properties were significantly influenced both by the ZnO loading ratio and the treated temperature. The gel composites showed a high performance for H(2)S removal, with the highest H(2)S adsorption capacity of 96.4mg/g for the sample treated at 400°C with 30wt% ZnO. Both physisorption and the active phase reactivation governed the H(2)S removal process. It needs to optimize the composites' porous structure and active component loading amount.
采用溶胶-凝胶法结合常压干燥工艺制备了不同活性成分负载的 ZnO/SiO(2) 凝胶复合材料，然后进行热处理。通过扫描电子显微镜（SEM）、氮气吸附、X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和 X 射线光电子能谱（XPS）对凝胶复合材料进行了表征，并通过室温下的动态测试评价了其对 H(2)S 的去除性能。所制备的材料具有高表面积和微孔及介孔区域的多模态孔径分布。ZnO 负载比和处理温度对多孔性能有显著影响。凝胶复合材料对 H(2)S 的去除性能很高，在 400°C 下处理、ZnO 负载 30wt% 的样品具有最高的 H(2)S 吸附容量，为 96.4mg/g。物理吸附和活性相再活化共同控制着 H(2)S 的去除过程。需要优化复合材料的多孔结构和活性成分负载量。
