Dirna Fitria Cita, Rahayu Istie, Maddu Akhiruddin, Darmawan Wayan, Nandika Dodi, Prihatini Esti
Department of Forest Products, Faculty of Forestry and Environment, IPB University, Bogor, West Java, Indonesia.
Department of Physics, Faculty of Mathematics and Natural Sciences, IPB University, Bogor, West Java, Indonesia.
Nanotechnol Sci Appl. 2020 Dec 18;13:131-136. doi: 10.2147/NSA.S282357. eCollection 2020.
Ultrasonication can be used to synthesize nanosilica from silica derived from betung bamboo sticks and leaves. This study aimed to synthesize nanosilica from betung bamboo sticks and leaves by the use of ultrasonication and to characterize the nanosilica produced.
The main materials used in this study were bamboo sticks and leaves. Betung bamboo sticks and leaves were sun-dried and then burned separately without adding fuel to produce charcoal. Then the produced charcoal was burned at a temperature of 700°C for 6 hours in a furnace to produce ash. Silica was extracted from furnace ash using reflux methods. The production of nanosilica from the silica derived from the betung bamboo sticks and leaves was carried out using ultrasonication.
The yield of silica from sticks and leaves was based on ash dry weight 45.73% and 79.93%, respectively. The nanosilica derived from betung bamboo sticks had a particle size in the range of 169.87-1479.50 nm, with an average size of 502.35 nm and a particle dispersion index value of 0.1420. Nanosilica derived from betung bamboo leaves had a particle size in the range of 234.49-851.36 nm, with an average size of 472.67 nm and a particle dispersion index value of 0.0670. Scanning electron microscopy analysis showed that silica from betung bamboo sticks and leaves still agglomerated. The particle size of silica could minimize through ultrasonication to synthesize nanosilica.
X-ray diffraction analysis showed that the structure of nanosilica differed from that of silica, and it appeared to be semicrystalline. The ultrasonication method for the synthesis of nanosilica derived from betung bamboo sticks and leaves ash can produce nanosilica that has a semicrystalline phase. The use of surfactants in the process can make the size of the nanosilica particles more uniform and reduce the size of the nanoparticles produced.
超声处理可用于从贝东竹枝和竹叶衍生的二氧化硅中合成纳米二氧化硅。本研究旨在通过超声处理从贝东竹枝和竹叶中合成纳米二氧化硅，并对所制备的纳米二氧化硅进行表征。
本研究使用的主要材料是竹枝和竹叶。将贝东竹枝和竹叶晒干，然后不添加燃料分别燃烧以制成木炭。然后将制得的木炭在炉中于700°C温度下燃烧6小时以产生灰烬。使用回流法从炉灰中提取二氧化硅。利用超声处理从贝东竹枝和竹叶衍生的二氧化硅中制备纳米二氧化硅。
基于灰分干重，竹枝和竹叶中二氧化硅的产率分别为45.73%和79.93%。源自贝东竹枝的纳米二氧化硅的粒径范围为169.87 - 1479.50 nm，平均粒径为502.35 nm，颗粒分散指数值为0.1420。源自贝东竹叶的纳米二氧化硅的粒径范围为234.49 - 851.36 nm，平均粒径为472.67 nm，颗粒分散指数值为0.0670。扫描电子显微镜分析表明，贝东竹枝和竹叶中的二氧化硅仍存在团聚现象。通过超声处理使二氧化硅粒径最小化以合成纳米二氧化硅。
X射线衍射分析表明，纳米二氧化硅的结构与二氧化硅不同，似乎为半结晶结构。利用超声处理法从贝东竹枝和竹叶灰中合成纳米二氧化硅可制备出具有半结晶相的纳米二氧化硅。在该过程中使用表面活性剂可使纳米二氧化硅颗粒尺寸更均匀，并减小所制备纳米颗粒的尺寸。
