| Understanding Stober Silica's Pore Characteristics Measured by Gas Adsorption | |
| Shanshan Li; Quan Wan; Zonghua Qin; Yuhong Fu; Yuantao Gu | |
| 2015 | |
| Source Publication | Langmuir (IF:3.833[JCR-2016],4.205[5-Year]) |
| Volume | 31Issue:2Pages:824-832 |
| Abstract | Controversial reports regarding Stober silica's microporosity and specific surface area remain in the literature despite decades of widespread applications. In this work, Stober silica samples prepared under controlled reaction time and postsynthesis washing/drying conditions were characterized by nitrogen adsorption at 77 K, transmission electron microscopy, elemental analysis, Fourier transform infrared spectroscopy, thermal analysis, and evolved gas analysis. Our experimental results demonstrated the important but often overlooked effects of reaction time and postsynthesis treatments on Stober silica's pore characteristics, as evidenced by the strikingly large range of BET specific surface area (11.3-309.7 m(2)/g). A simple micropore filling and blocking mechanism compatible with an existing Stober silica growth model incorporating both aggregation and monomer addition steps was proposed to explain all our experimental findings. The carbon and nitrogen contents appear to serve well as the indicative link between our experimental variables and the resulting pore blocking by TEOS and its derivatives. A suitable combination of experimental conditions is recommended in order to make microporous Stober silica samples with large specific surface area, including a short reaction time, water washing, and drying at moderate temperature preferably under vacuum. |
| Subject Area | 矿床地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/5991 |
| Collection | 矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文 |
| Recommended Citation GB/T 7714 | Shanshan Li,Quan Wan,Zonghua Qin,et al. Understanding Stober Silica's Pore Characteristics Measured by Gas Adsorption[J]. Langmuir,2015,31(2):824-832. |
| APA | Shanshan Li,Quan Wan,Zonghua Qin,Yuhong Fu,&Yuantao Gu.(2015).Understanding Stober Silica's Pore Characteristics Measured by Gas Adsorption.Langmuir,31(2),824-832. |
| MLA | Shanshan Li,et al."Understanding Stober Silica's Pore Characteristics Measured by Gas Adsorption".Langmuir 31.2(2015):824-832. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Understanding Stober（3995KB） | 开放获取 | License | View Application Full Text | |||
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