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| Content Provider | IET Digital Library |
|---|---|
| Author | Liu, Kai Zheng, Nan Li, Xiaohong Zhang, Zhijun |
| Abstract | A report is presented on the preparation of surface-functionalised nanosilica from silicon tetrachloride (SiCl4, one of the major by-products in the polycrystalline silicon industry) by in-situ surface modification in aqueous solution. The approach uses both SiCl4 and sodium metasilicate as the silicon sources to generate nanosilica, whereas the proportion of sodium metasilicate and SiCl4 is adjusted to control the pH value of the reaction system. In this way, desired SiO2 nanoparticles were in-situ surface-modified by hexamethyldisilazane as soon as they were generated in the reaction solution, which makes it feasible to prevent the severe aggregation of nanosilica that often happens during the hydrolytic process. The obtained nanosilica with uniform particle size distribution (mean diameter 35–40 nm) shows superhydrophobicity (a water contact angle of 165°) and excellent organic dispersibility. Thanks to the low cost of raw materials as well as the superhydrophobicity and lipophilicity of as-prepared nanosilica, its application for improving the selective penetration of oil is primarily investigated. The result shows that quartz sand modified by as-prepared nanosilica can separate diesel oil from water successfully, which could be significant for improving crude oil recovery efficiency. |
| Starting Page | 15 |
| Ending Page | 18 |
| Page Count | 4 |
| Volume Number | 8 |
| e-ISSN | 17500443 |
| Issue Number | Issue 1, Jan (2013) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/mnl/8/1 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/mnl.2012.0887 |
| Journal | Micro & Nano Letters |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Aggregation Aqueous Solution Corrosion Crude Oil Recovery Efficiency Diesel Oil Electrochemistry And Electrophoresis Engineering Material Etching Fluid SurFace And InterFace with Fluid Hexamethyldisilazane Hydrolytic Process Hydrophobicity Industrial Processes Method of Nanofabrication And Processing Nanofabrication Nanoparticle Nanosilica Lipophilicity Nanosilica Severe Aggregation Nanosilica Superhydrophobicity Nanotube And Nanostructured Material Oil Selective Penetration Oils Organic Dispersibility Other Surface Treatments Oxidation Particle Size PH Quartz Sand Reaction Solution Reaction System PH Semiconductor Technology Separation Silica NanoParticle Silicon Compound Silicon Source Silicon Tetrachloride SiO2 Size 35 Nm to 40 Nm Sodium Metasilicate Structure of Solid Clusters Surface Modification Surface Topography Measurement Surface Treatment Surface-functionalised Nanosilica Preparation Surface-modified Nanosilica Preparation Uniform Particle Size Distribution |
| Content Type | Text |
| Resource Type | Article |
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