期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 10, 期 50, 页码 16985-16994出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.2c05989
关键词
Solar harvesting; Nanofluids; Photothermal conversion; TiO2; Deep eutectic solvent
资金
- National Natural Science Foundation of China
- Natural Science Foundation of Jiangsu Province
- China Postdoctoral Science Foundation
- [51906252]
- [BK20190632]
- [2019M661980]
A novel one-pot one-step strategy was used to fabricate a superior stable nanofluid with tetrabutyl titanate as a precursor in glycerol/chlorine chloride deep eutectic solvents. The nanofluid exhibited excellent stability and a thermal conductivity enhancement ratio up to 9.0%.
Nanofluids have emerged as an important working fluid for various heat transfer and thermal energy transportation demands thanks to its promising thermal conductivity. While, poor static stability brought by segregation of nanoparticle heavily hinders its wide practical utilization. In this work, a novel one-pot one-step strategy was realized to generate a superior stable nanofluid which can stand uneventfully for at least 2 months without observation of any sedimentation with tetrabutyl titanate as a TiO2 precursor in glycerol/chlorine chloride deep eutectic solvents. Mechanism study reveals that the good stability of this nanofluid is mainly attributed to in situ formation protocol for which the inherent aggregation of TiO2 can be theoretically avoided. Meanwhile, thermophysical properties, such as viscosity, thermal conductivity, and rheological behavior, were comprehensively studied, which indicates that the obtained nanofluids exhibit a non-Newtonian shear thinning fluid behavior with a thermal conductivity enhancement ratio up to 9.0%. More importantly, photothermal conversion efficiency of the nanofluid could reach 51.2%, and the efficiency enhancement is 181.9% over the pristine deep eutectic solvents. This work paves a novel avenue for fabricating nanofluids with super static stability and gives a supplementary idea for one-step nanofluids preparation process.
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