Lasfargues Mathieu, Stead Graham, Amjad Muhammad, Ding Yulong, Wen Dongsheng
School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK.
School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK.
Materials (Basel). 2017 May 19;10(5):537. doi: 10.3390/ma10050537.
Seeding nanoparticles in molten salts has been shown recently as a promising way to improve their thermo-physical properties. The prospect of such technology is of interest to both academic and industrial sectors in order to enhance the specific heat capacity of molten salt. The latter is used in concentrated solar power plants as both heat transfer fluid and sensible storage. This work explores the feasibility of producing and dispersing nanoparticles with a novel one pot synthesis method. Using such a method, CuO nanoparticles were produced in situ via the decomposition of copper sulphate pentahydrate in a KNO₃-NaNO₃ binary salt. Analyses of the results suggested preferential disposition of atoms around produced nanoparticles in the molten salt. Thermal characterization of the produced nano-salt suspension indicated the dependence of the specific heat enhancement on particle morphology and distribution within the salts.
最近研究表明，在熔盐中植入纳米颗粒是改善其热物理性质的一种很有前景的方法。为了提高熔盐的比热容，这项技术的前景引起了学术界和工业界的兴趣。熔盐在聚光太阳能发电厂中用作传热流体和显热储能介质。本研究探索了采用一种新型的一锅法合成并分散纳米颗粒的可行性。利用该方法，通过五水硫酸铜在KNO₃-NaNO₃二元盐中的分解原位制备了CuO纳米颗粒。结果分析表明，熔盐中生成的纳米颗粒周围原子存在优先排列。对制备的纳米盐悬浮液的热表征表明，比热容的提高取决于颗粒形态和在盐中的分布情况。
