A mechanistic study of silica-etching by hot water.
文献类型：期刊论文
| 作者 | Li, Chaoran; Yu, Jia; Du, Xuemin; He, Le; Zhang, Xiaohong; Zhu, Zhijie; Zhang, Shumin; Zhang, Jinpan |
| 刊名 | PHYSICAL CHEMISTRY CHEMICAL PHYSICS
 |
| 出版日期 | 2018 |
| 文献子类 | 期刊论文 |
| 英文摘要 | etching of colloidal silica by hot water provides a green chemistry method for the preparation ofmesoporous silica. Nevertheless, the reaction mechanism of this etching process has not been elucidated and its reproducibility is often questionable, which has hindered its widespread application in the preparation of mesoporous silica materials. Herein, we present a systematic study on the hot-water etching of sol-gel derived silica shells coated on alpha-Fe2O3 particles. Transmission electron microscopy and infrared spectroscopy studies provide substantial evidence that colloidal silica with low hydrolysis and condensation degrees (or aging degrees) is preferentially etched by hot water. More importantly, we show that the aging degree of silica shells, which determines the etching rate, can be precisely tuned by controlling the sol-gel preparation time and the storage time in room-temperature water prior to hot-water etching. These results provide novel insights into the physicochemical properties of sol-gel derived colloidal silica and the mechanistic understanding of the reaction kinetics of silica etching by hot water. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/14271]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 推荐引用方式 GB/T 7714 | Li, Chaoran,Yu, Jia,Du, Xuemin,et al. A mechanistic study of silica-etching by hot water.[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2018. |
| APA | Li, Chaoran.,Yu, Jia.,Du, Xuemin.,He, Le.,Zhang, Xiaohong.,...&Zhang, Jinpan.(2018).A mechanistic study of silica-etching by hot water..PHYSICAL CHEMISTRY CHEMICAL PHYSICS. |
| MLA | Li, Chaoran,et al."A mechanistic study of silica-etching by hot water.".PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2018). |
入库方式： OAI收割
来源：深圳先进技术研究院
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