Silica is a major inorganic component of rice husk and present in the form of nanoparticle in it. Therefore, it is possible to extract high purity amorphous silica nanoparticles by simple thermo-chemical treatments. So, in this study amorphous silica nanoparticles were tried to produce from rice husk ash through an eco-friendly chemical treatment approach. Characteristics of the extracted nanoparticles were validated by comparing with commercial grade amorphous silica nanoparticles using several material characterization techniques. From X-ray diffraction analysis and Transmission electron microscopy-Selected area electron diffraction patterns, the amorphous behavior was observed for both silica samples, while from Fourier-transform infrared spectroscopy spectra, predominantly siloxane and silanol groups were found. From Scanning Electron, Transmission Electron and Atomic Force Microscopy images, the presence of primary nanoparticles were evidenced along with secondary micro-particles, maybe due to their agglomeration. The diameter of particle was in the range of 17.71 ± 7.53 nm and 19.49 ± 13.03 nm for the extracted silica and commercial grade amorphous silica, respectively. Hence, this silica nanoparticles can be utilized in the field of microelectronics, sensors, nano-additives etc.

二氧化硅是稻壳的主要无机成分，并以纳米颗粒形式存在于其中。因此，可以通过简单的热化学处理来提取高纯度无定形二氧化硅纳米颗粒。因此，在这项研究中，尝试通过一种生态友好的化学处理方法从稻壳灰中生产出无定形二氧化硅纳米粒子。通过使用几种材料表征技术与商业级无定形二氧化硅纳米粒子进行比较，验证了提取的纳米粒子的特性。从X射线衍射分析和透射电子显微镜选择的区域电子衍射图可知，两种二氧化硅样品均观察到非晶态，而从傅立叶变换红外光谱中发现主要为硅氧烷基和硅烷醇基。从扫描电子，在透射电子和原子力显微镜图像中，主要的纳米颗粒与次要的微粒一起被证明存在，这可能是由于它们的团聚。对于提取的二氧化硅和商业级无定形二氧化硅，颗粒的直径分别在17.71±7.53nm和19.49±13.03nm的范围内。因此，这种二氧化硅纳米粒子可用于微电子，传感器，纳米添加剂等领域。