Size-Controlled Synthesis of CuO Nanoparticles by the Supercritical Antisolvent Method in SBA-15
| العنوان: | Size-Controlled Synthesis of CuO Nanoparticles by the Supercritical Antisolvent Method in SBA-15 |
|---|---|
| المؤلفون: | Qin-Qin Xu, Zhenya Duan, Dan Zhou, Aiqin Wang, Guo-Yue Qiao, Ju-Tao Liu, Jian-Zhong Yin |
| المصدر: | ACS Sustainable Chemistry & Engineering. 9:129-136 |
| بيانات النشر: | American Chemical Society (ACS), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, Supercritical carbon dioxide, Renewable Energy, Sustainability and the Environment, General Chemical Engineering, Nucleation, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Surface energy, Supercritical fluid, 0104 chemical sciences, law.invention, Chemical engineering, law, Mass transfer, Environmental Chemistry, Deposition (phase transition), Calcination, 0210 nano-technology, Dispersion (chemistry) |
| الوصف: | Herein, we describe a facile method to control the size and dispersion of CuO nanoparticles (NPs) in SBA-15 by the supercritical antisolvent (SAS) method during the depressurization process of supercritical fluid deposition (SCFD), describing the mass transfer between supercritical carbon dioxide (scCO₂) and a cosolvent. On reducing the concentration of the cupric nitrate precursor, the size of CuO NPs was decreased from 3.5 ± 1.0 to 1.0 ± 0.4 nm (Cu loading 14.2–12.1 wt %) under the depressurized rate of ∼20 MPa/min. Based on the size distribution and nucleation theory, the nucleation rate of the precursor could reach 10²⁵ cm–³·s–¹, and the calculated interface energy of cupric nitrate was less than 0.1 J/m², indicating that scCO₂ as an antisolvent caused the heterogeneous nucleation of the precursor on the surface of SBA-15 channels. Hence, the nucleation rate and growth of cupric nitrate were regulated under a given scCO₂ depressurized rate, and then the CuO NPs’ size distribution and Cu loading were controlled subsequent to calcination. |
| تدمد: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.0c05577 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::33897948815140c507319d68985d4cd5 https://doi.org/10.1021/acssuschemeng.0c05577 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........33897948815140c507319d68985d4cd5 |
| قاعدة البيانات: | OpenAIRE |
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