期刊文献+

硫氰基功能化空心二氧化硅微球的一步法制备及其吸附性能研究

One-step Preparation and Adsorption Properties of Thiocyanatofunctionalized Hollow Silica Spheres
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摘要 在乙醇/水介质中,以分散聚合法制备的聚苯乙烯(PS)微球为模板,十六烷基三甲基溴化铵(CTAB)为共模板,3-硫氰丙基三乙氧基硅烷(TCPTES)为前驱体,氨水为催化剂,通过一步法成功地制备了硫氰丙基功能化的空心SiO2微球(TC-HSSs)。通过扫描电镜(SEM)、透射电镜(TEM)、热重(TG)、红外光谱(FT-IR)、全自动比表面积及孔隙度分析仪(ASAP)以及原子吸收光谱(AAS)等手段对所制备的TC-HSSs的结构和性能进行了研究。结果表明,制备TC-HSSs的最佳条件是:氨水体积为1.5mL,反应温度为50℃,PS、TCPTES的质量比为1/12。所制备的TC-HSSs粒径在710~810nm,壁厚在70~120nm。最佳条件下制备的TC-HSSs的比表面积为152m2/g,孔径主要分布在3~7nm,孔体积为0.74cm3/g,且分散性较好。该材料对Pd2+粒子具有较高的吸附量(358.82mg/g)。 Novel thiocyanato-functionalized hollow silica spheres (TC-HSSs) were successfully synthesized using monodispersed polystyrene (PS) microspheres prepared by dispersion polymerization as template, cetyltrimethyl ammonium bromide (CTAB) as cotemplates, thiocyanatopropyltriethoxysilane (TCPTES) as precursor and ammonia as catalyst via a one-step method in alcohol/water mixed medium. The properties of TC-HSSs were examined by scan- ning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform infrared spectrometer (FT-IR), thermogravimetric analyzer (TG), automatic surface area and porosity analyzer (ASAP) and atomic absorp- tion spectroscope (AAS). The inference was that the optimum conditions for preparation of TC-HSSs were: amount of ammonia 1.5 mL, reaction temperature 50 ~C, and mass ratio of PS/TCPTES 1/12. The diameters of TC-HSSs varied in the range of 710 nm to 810 nm, and wall thicknesses were in the range of 70 nm to 120 nm. Under the opti- mum condition, the BET surface area, the pore volume and the average pore size of well dispersed TC-HSSs were 152 m2/g, O. 74 cm3/g and 3- 7 nm, respectively, and they (358. 82 mg/g). exhibited relatively high adsorption capacity for Cd ( Ⅱ )
出处 《材料导报》 EI CAS CSCD 北大核心 2015年第14期21-25,共5页 Materials Reports
基金 国家自然科学基金(51273155) 湖北省自然科学基金(2014CFB862) 天然药物及仿生药物国家重点实验室开放基金(K20140214)
关键词 硫氰丙基 一步法 聚苯乙烯微球 二氧化硅 吸附 thiocyanato, one-step method, polystyrene microspheres, silica, adsorption
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参考文献24

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