Engineering of paraffin Wax@Expanded graphite with a Yolk-Shell structure for simultaneous photothermal water evaporation and electricity generation

被引：2

作者：

Nader, Aisha ^{[1
]}

Kospa, Doaa A. ^{[1
]}

Ahmed, Awad I. ^{[1
]}

Ibrahim, Amr Awad ^{[1
]}

Elbanna, O. A. ^{[1
]}

机构：

[1] Mansoura Univ, Fac Sci, Dept Chem, Mansoura 35516, Egypt

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2025年 / 354卷

关键词：

Water desalination; Expanded graphite (EG); Paraffin wax; Yolk-shell structure; Microencapsulation; Phase change materials PCMs; PHASE-CHANGE MATERIALS; MECHANICAL-PROPERTIES; HIGHLY EFFICIENT; GRAPHENE OXIDE; PERFORMANCE; STEAM; TEMPERATURE; FABRICATION; COMPOSITES; PARTICLES;

D O I：

10.1016/j.seppur.2024.128776

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Leveraging solar energy through hybrid solar-driven interfacial evaporation is a hopeful way to couple clean water production and electricity generation simultaneously. In this context, a yolk-shell structure made of paraffin wax combined with expanded graphite (PW@EG) was used as a cost-effective and efficient evaporator. A yolk-shell structure was fabricated by encapsulating PW within a SiO2 shell. Subsequently, the EG outer shell was coated onto the PW/SiO2 microcapsules. The silica shell segregating the external EG shell from the PW core was eliminated utilizing HCl, forming a yolk-shell structure (PW@EG). The core@void@shell enables multiple reflections of solar light through the interior voids, enhancing light utilization efficiency. As a result, the prepared structure demonstrates exceptional capability for wide-spectrum solar absorption and photothermal transformation, fast water movement, and good thermal management. Exploiting these attributes, the bi-layer solar evaporator depicted a high evaporation rate of 1.314 kg m-2h- 1 and an evaporation capability of 91.0 % under one sun's illumination. Moreover, incorporating the bilayer evaporator with a thermoelectric module facilitates the transformation of waste heat into electricity. This hybrid device depicts output power density up to 150.2

引用

页数：11