标題：Up-scalable and controllable electrolytic production of photo-responsive nanostructured silicon作者：Xiao, Wei;Jin, Xianbo;Chen, George Zheng

來源出版物：JOURNAL OF MATERIALS CHEMISTRY A 卷：1 期：35 頁：10243-10250 DOI：10.1039/c3ta11823a出版年：2013

摘要：The electrochemical reduction of solid silica has been investigated in molten CaCl2 at 900 degrees C for the one-step, up-scalable, controllable and affordable production of nanostructured silicon with promising photo-responsive properties. Cyclic voltammetry of the metallic cavity electrode loaded with fine silica powder was performed to elaborate the electrochemical reduction mechanism. Potentiostatic electrolysis of porous and dense silica pellets was carried out at different potentials, focusing on the influences of the electrolysis potential and the microstructure of the precursory silica on the product purity and microstructure. The findings suggest a potential range between -0.60 and -0.95 V (vs. Ag/AgCl) for the production of nanostructured silicon with high purity (>99 wt%). According to the elucidated mechanism on the electro-growth of the silicon nanostructures, optimal process parameters for the controllable preparation of high-purity silicon nanoparticles and nanowires were identified. Scaling-up the optimal electrolysis was successful at the gram-scale for the preparation of high-purity silicon nanowires which exhibited promising photo-responsive properties.

入藏号：WOS:000323132700024

文獻類型：Article

語種：English

擴展關鍵詞：MOLTEN CACL2; 3-PHASE INTERLINES; ELECTROCHEMICALLY DRIVEN; INSULATOR COMPOUNDS; NANOWIRE ARRAYS; SIO2 PELLETS; SOLID SIO2; REDUCTION; ELECTROREDUCTION; NANOPARTICLES

通訊作者地址：Jin, Xianbo;Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.

電子郵件地址：xbjin@whu.edu.cn; george.chen@nottingham.ac.uk

地址：

[Xiao, Wei; Jin, Xianbo; Chen, George Zheng]Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.

[Xiao, Wei] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Chen, George Zheng] Univ Nottingham, Dept Chem & Environm Engn, Nottingham NG7 2RD, England.

[Chen, George Zheng] Univ Nottingham, Energy & Sustainabil Res Div, Fac Engn, Nottingham NG7 2RD, England.

研究方向：Chemistry; Energy & Fuels; Materials Science

ISSN：2050-7488