Preparation and properties of substrate PVA-GO composite membrane for solar photothermal conversion

doi:10.1007/s11706-021-0578-0

Frontiers of Materials Science

2021, Vol. 15

Issue (4): 632-642 https://doi.org/10.1007/s11706-021-0578-0

本期目录

Preparation and properties of substrate PVA-GO composite membrane for solar photothermal conversion

Chengxin LI¹, Zhuwei GAO^1,²(

), Zhongxin LIU^1,³

¹. School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
². Key Laboratory of Advanced Materials of Tropical Island Resources (Ministry of Education), Hainan University, Haikou 570228, China
³. Hainan Provincial Key Laboratory of Fine Chemicals, Hainan University, Haikou 570228, China

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Abstract：

Solar thermal desalination (STD) is a promising and sustainable techno- logy for extracting clean water resources. Whereas recent studies to improve STD performance primarily focus on interfacial solar evaporation, a non-traditional bottom heating method was designed in this study. Herein, we prepared the polyvinyl alcohol/graphene oxide (PVA-GO) composite membrane and adhered to the bottom of a beaker using crystallized PVA. The GO was loaded on a non-woven fabric and different concentrations of PVA were compared for their effect on the evaporation efficiency. The results showed that the addition of PVA increased the evaporation rate. The surface characteristic of GO membrane without PVA was a fibrous filamentous structure as observed by SEM, whereby the fibers were clearly visible. When the PVA concentration reached 6%, the non-woven fiber was completely wrapped by PVA. Under the action of a fixed light intensity, the photothermal conversion rates of GO, 2% PVA-GO, 4% PVA-GO and 6% PVA-GO membrane device could reach 39.93%, 42.61%, 45.10% and 47.00%, respectively, and the evaporation rates were 0.83, 0.88, 0.94 and 0.98 kg·m⁻²·h⁻¹, respectively. In addition, the PVA-GO composite membrane showed an excellent stability, which has significance for industrial application.

Key words： solar thermal desalination PVA-GO membrane photothermal evaporator photothermal conversion efficiency stability

收稿日期: 2021-08-29 出版日期: 2021-12-28

Corresponding Author(s): Zhuwei GAO

引用本文:

. [J]. Frontiers of Materials Science, 2021, 15(4): 632-642.
Chengxin LI, Zhuwei GAO, Zhongxin LIU. Preparation and properties of substrate PVA-GO composite membrane for solar photothermal conversion. Front. Mater. Sci., 2021, 15(4): 632-642.

链接本文:

https://academic.hep.com.cn/foms/CN/10.1007/s11706-021-0578-0
https://academic.hep.com.cn/foms/CN/Y2021/V15/I4/632

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