论文标题
太阳能应用的不同功能化石墨烯纳米纳米纳米流体的比较研究
Comparative study of different functionalized graphene-nanoplatelet aqueous nanofluids for solar energy applications
论文作者
论文摘要
纳米流体的光学特性是特殊的，并且在各种应用中都很有趣。其中，纳米流体的高光灭绝系数可用于线性抛物线浓缩太阳系，而它们在高光照射强度下的性能可以用于直接太阳蒸汽的产生。因此，胶体的光学表征，包括对非线性光学性质的研究，是设计这种新型材料进行太阳能开发的必要步骤。在这项工作中，我们分析了两种不同类型的纳米流体，这些纳米流体由化学改性的石墨烯纳米片（P-GNP）和磺酸官能化的石墨烯纳米纤维片（S-GNP）组成，在水中分散在水中，在0.005 wt％至0.05 wt ft三个浓度中分散。具有良好的光灭绝特性以及高输入太阳强度下的非线性光学行为，实现了中等稳定的纳米流体。
The optical properties of nanofluids are peculiar and interesting for a variety of applications. Among them, the high light extinction coefficient of nanofluids can be useful in linear parabolic concentrating solar systems, while their properties under high light irradiation intensities can be exploited for direct solar steam generation. The optical characterization of colloids, including the study of non-linear optical properties, is thus a needed step to design the use of such novel materials for solar energy exploitation. In this work, we analysed two different types of nanofluids, consisting of polycarboxylate chemically modified graphene nanoplatelets (P-GnP) and sulfonic acid-functionalized graphene nanoplatelets (S-GnP) dispersed in water, at three concentrations from 0.005 wt% to 0.05 wt%. Moderately stable nanofluids were achieved with favourable light extinction properties, as well as a non-linear optical behaviour under high input solar intensities.
