In-situ synthesis of Ag/SBA-15 nanocomposites by the “pH-adjusting” method
In-situ synthesis of Ag/SBA-15 nanocomposites by the “pH-adjusting” method
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DOI：
10.1016/j.matlet.2011.03.072
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发表时间：
2011-06
影响因子：
3
通讯作者：
Xiao-Dang Zhang;Z. Qu;Xinyong Li;Qidong Zhao;Xin Zhang;X. Quan
中科院分区：
文献类型：
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作者：
Xiao-Dang Zhang;Z. Qu;Xinyong Li;Qidong Zhao;Xin Zhang;X. Quan
通过“pH调节”方法将Ag纳米颗粒掺入介孔SBA-15的孔道中。在此过程中，通过添加氨将溶液的pH值调节至7.5。通过X射线粉末衍射（XRD）、透射电子显微镜（TEM）、N2吸附-脱附等温线、电感耦合等离子体原子发射光谱（ICP-AES）和傅里叶变换红外光谱（FT-IR）技术系统研究了Ag/SBA-15纳米复合材料的结构性质。表征结果表明，合成的材料呈现出高度有序的六角形介孔结构，高度分散的Ag纳米颗粒被限制在介孔内。这是首次报道通过原位pH调节方法制备的氧化物具有如此高的Ag负载量。
Ag nanoparticles were incorporated into the channels of mesoporous SBA-15 by the “pH-adjusting” method. In this procedure, the pH value of the solution was adjusted up to 7.5 by adding ammonia. The structural properties of Ag/SBA-15 nanocomposites were systematically investigated by X-ray powder diffraction (XRD), Transmission electron microscope (TEM), N2adsorption-desorption isotherms, inductively coupled plasma atomic emission spectroscopy (ICP-AES) and Fourier transform infrared spectroscopy (FT-IR) techniques. The characterization results reveal that the synthesized materials exhibit highly ordered hexagonal mesoporous structures, and highly dispersed Ag nanoparticles are confined inside the mesopores. It is the first time to report such high Ag loading on oxides fabricated byin-situpH-adjusting method.