Molten salt electrosynthesis of silicon carbide nanoparticles and their photoluminescence property  

熔盐电解合成碳化硅纳米颗粒及其光致发光特性

作　　者：Zhong-ya PANG Xiang LI Xue-qiang ZHANG Jin-jian LI Shu-juan WANG Xiao-lu XIONG Guang-shi LI Qian XU Zhong-fu ZHOU Xing-li ZOU Xiong-gang LU 庞忠亚;李想;张学强;李金键;汪淑娟;熊晓璐;李光石;许茜;周忠福;邹星礼;鲁雄刚(上海大学材料科学与工程学院高品质特殊钢冶金与制备省部共建国家重点实验室,上海200444;Institute of Mathematics and Physics,Aberystwyth University,Aberystwyth SY233BZ,UK;上海电机学院材料学院,上海201306)

机构地区：[1]State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy,School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China [2]Institute of Mathematics and Physics,Aberystwyth University,Aberystwyth SY233BZ,UK [3]School of Materials Science,Shanghai Dianji University,Shanghai 201306,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第11期3790-3800,共11页中国有色金属学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52022054,51974181,52004157);the Shanghai Rising-Star Program,China(No.19QA1403600);the Shanghai Sailing Program,China(No.21YF1412900);and the Iron and Steel Joint Research Fund of National Natural Science Foundation of China and China Baowu Steel Group Corporation Limited(No.U1860203);the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning,China(No.TP2019041);the Shanghai Postdoctoral Excellence Program,China(No.2021160);the“Shuguang Program”supported by the Shanghai Education Development Foundation and the Shanghai Municipal Education Commission,China(No.21SG42).

摘　　要：A one-step molten salt electrochemical strategy was proposed to synthesize SiC nanoparticles from ultra-fine silicon dioxide/carbon(SiO_(2)/C)mixtures.The electrosynthesis process and physicochemical properties of the synthesized products were systematically analyzed via X-ray diffraction,electron microscopy,Raman spectroscopy and photoluminescence spectroscopy,etc.A combined chemical/electrochemical reaction,electrochemical deoxidation,and in-situ carbonization reaction mechanism was proposed to reveal the electrochemical synthesis process of SiC nanoparticles from SiO_(2)/C in molten CaCl_(2).The as-prepared SiC with particle size ranging from 8 to 14 nm possesses a polycrystalline structure.In addition,the SiC nanoparticles demonstrate obvious photoluminescence property due to the synergetic size effect and microstructural characteristics.提出一种一步熔盐电化学方法,以超细二氧化硅和碳粉混合物为原料合成碳化硅纳米颗粒。通过X射线衍射、电子显微镜、拉曼光谱、光致发光光谱等系统研究电解合成过程及产物的物化特性。提出二氧化硅/碳粉在氯化钙熔盐中电解合成纳米碳化硅时存在化学/电化学复合、电化学脱氧和原位碳化的耦合反应机理。结果表明,所制备的碳化硅纳米颗粒的粒径集中分布在8~14 nm,并具有多晶结构。此外,由于协同的尺寸效应和微观结构特征,碳化硅纳米颗粒具有明显的光致发光特性。

关 键 词：SiC NANOMATERIALS molten salt electrosynthesis DEOXIDATION PHOTOLUMINESCENCE 

分 类 号：TQ127.2[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]