摘要
纳米级多孔硅复合含能材料是当前各国军事领域的重要新兴材料,其由于具有较大的比表面积和较高的反应活性,在一定触发条件下发生快速燃烧爆炸,放出高效能量。为实现纳米多孔硅批量生产,采用电化学阳极氧化法小批量制备多孔硅,通过扫描电子显微镜(SEM)、稳态荧光光谱仪对多孔硅的结构形貌、光致发光特性进行分析研究。结果表明:多孔硅的发光强度随腐蚀时间的延长先增后减,与电流密度呈负相关,其荧光特征峰随电解液配比中氢氟酸含量的增加趋向红移;增大电流密度和延长腐蚀时间即可制备出孔隙率大、纵向刻蚀深的多孔硅,且随着腐蚀液体系中氢氟酸浓度配比的增加,在可控的实验范围内制备出的纳米级多孔硅均匀性、致密性和平整度越好,有望实现多孔硅的批量可控生产。
Nano-porous silicon(PS)composite energetic material is currently an important emerging material in the military field of various countries.Due to the large specific surface area,high chemical activity and other excellent properties,it can cause rapid combustion and explosion under certain trigger conditions and release high-efficiency energy.In order to realize the mass production of nano-porous silicon,the electrochemical single-cell anodization method was used to prepare porous silicon in small batches,and the structure,morphology and photoluminescence properties of porous silicon were analyzed and studied by scanning electron microscope(SEM)and steady-state fluorescence spectrometer.The results show that the luminescence intensity of porous silicon increases first then decreases with the prolongation of corrosion time,and is neagatively correlated with the increase of current density;its fluorescence peak tends to red-shift with the increase of hydrofluoric acid content in the electrolyte ratio;the increase of current density and etching time benefits the preparation of porous silicon with large porosity and deep longitudinal etching,and with the increase of the concentration ratio of hydrofluoric acid in the etching solution system,better uniformity,compactness and flatness of nano-scale porous silicon can be obtained within the range of controlled experimental conditions,for which the batch controllable production of porous silicon can be effectively realized.
作者
简燕
杨文静
杨磊
宋绍意
倪婕
何银芳
JIAN Yan;YANG Wenjing;YANG Lei;SONG Shaoyi;NI Jie;HE Yinfang(School of College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400000,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第S01期114-119,共6页
Materials Reports
基金
重庆市重点实验室开放课题(KFJJ2004)
关键词
纳米多孔硅
电化学阳极氧化法
批量生产
光致发光性能
理化性质
nano-porous silicon
electrochemical etching
batch preparation
photoluminescence
physical and chemical properties
