利用印尼高岭土控制用于去除铅的方钠石纳米颗粒的尺寸和孔隙率。
Controlling the Size and Porosity of Sodalite Nanoparticles from Indonesian Kaolin for Pb Removal.
作者信息
Ulfa Maria, Masykur Abu, Nofitasari Amanah Firdausa, Sholeha Novia Amalia, Suprapto Suprapto, Bahruji Hasliza, Prasetyoko Didik
机构信息
Chemistry Education Study Program, Faculty of Teacher Training and Education, Sebelas Maret University, Surakarta 57126, Indonesia.
Department of Chemistry, Science Faculty, Sebelas Maret University, Jl Ir Sutami 36A, Surakarta 57126, Indonesia.
出版信息
Materials (Basel). 2022 Apr 8;15(8):2745. doi: 10.3390/ma15082745.
Mesoporous sodalite nanoparticles were directly synthesized from Indonesian kaolin with the addition of CTABr as a mesopore template. The studies highlighted the importance of aging time (3-12 h) and temperature (50-80 °C) on increasing surface area and mesoporosity of sodalite. Indonesian kaolin was used without pre-treatment and transformed to sodalite following the initial molar composition of 10 NaO: 2 SiO: AlO: 128 HO. Characterization data revealed the formation of high surface area sodalite with mesoporosity at increasing aging temperatures and times. The presence of CTABr as templates produced sodalites nanoparticles with smaller aggregates than the non-template sodalite. The sodalite sample obtained at 80 °C of crystallization temperature for 9 h (S80H9) displayed the highest mesopore volume (0.07612 cm/g) and the highest adsorption capacity of Pb (212.24 mg/g). Pb was suggested to adsorb via ion exchange with the Na counter cation and physical adsorption.
介孔方钠石纳米颗粒是由印度尼西亚高岭土直接合成的，添加了十六烷基三甲基溴化铵（CTABr）作为介孔模板。研究强调了老化时间（3 - 12小时）和温度（50 - 80°C）对增加方钠石表面积和介孔率的重要性。印度尼西亚高岭土未经预处理就被使用，并按照10NaO:2SiO:AlO:128HO的初始摩尔组成转化为方钠石。表征数据显示，随着老化温度和时间的增加，形成了具有介孔率的高表面积方钠石。作为模板的CTABr的存在产生了比无模板方钠石聚集物更小的方钠石纳米颗粒。在80°C结晶温度下9小时获得的方钠石样品（S80H9）显示出最高的介孔体积（0.07612 cm/g）和最高的铅吸附容量（212.24 mg/g）。据推测，铅通过与Na抗衡阳离子的离子交换和物理吸附进行吸附。
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