CAJ | 학술논문

利用一种温和的还原剂六亚甲基四胺(HMT)通过一步合成的方法制备了介孔Ag/SBA-15分子筛,采用粉末X射线衍射(XRD)、透射电镜(TEM)和氮气吸附/脱附等手段对样品进行了表征.样品的比表面积为525 m~2/g,平均孔径为5.4 nm.用XPS、广角XRD和高分辨TEM等手段证实样品中的银为金属态的纳米颗粒.研究结果表明,以六亚甲基四胺为还原剂通过原位还原的方法能使银纳米颗粒较好地分散到介孔材料的孔道中.
이용일충온화적환원제륙아갑기사알(HMT)통과일보합성적방법제비료개공Ag/SBA-15분자사,채용분말X사선연사(XRD)、투사전경(TEM)화담기흡부/탈부등수단대양품진행료표정.양품적비표면적위525 m~2/g,평균공경위5.4 nm.용XPS、엄각XRD화고분변TEM등수단증실양품중적은위금속태적납미과립.연구결과표명,이륙아갑기사알위환원제통과원위환원적방법능사은납미과립교호지분산도개공재료적공도중.
Mesoporous silicas SBA-15 with Ag nanoparticles in the channel was synthesized by one-step method with a mild reducing reagent (hexamethylenetetramine). Samples characterzation were performed by the XRD, TEM, adsorption/desorption of nitrogen. The surface areas of Ag/SBA-15 is 525 m~2/g and the average pore diameter is 5.4 nm. Presence of nanoparticles of silver in mesoporous SBA-15 were confirmed by X-ray photoelectron spectroscopy (XPS), high angle X-ray diffraction (XRD) and transmission electron microscopy(TEM) confirmed the diameter of the metal nanoparticles. The content of the silver in the Ag/SBA15 was detected by ICP-AES. The silver nanoparticles were dispersed uniformly by the in situ auto-reduction reaction with hexamethylenetetramine (HMT) as reducing reagent, and diameter of nanoparticles is found to be about 8.0 nm which is coincident with the channel diameter of SBA-15.