Investigation on enhancing effects of Au nanoparticles on solar steam generation in graphene oxide nanofluids

被引：150

作者：

Fu, Yang ^{[1
]}

Mei, Tao ^{[1
]}

Wang, Gang ^{[1
]}

Guo, Ankang ^{[1
]}

Dai, Guangchao ^{[1
]}

Wang, Sheng ^{[1
]}

Wang, Jianying ^{[1
]}

Li, Jinhua ^{[1
]}

Wang, Xianbao ^{[1
]}

机构：

[1] Hubei Univ, Sch Mat Sci & Engn, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Minist Educ Key Lab Green Preparat & Applicat Fun, Wuhan 430062, PR, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2017年 / 114卷

基金：

中国国家自然科学基金;

关键词：

Graphene oxide; Au nanoparticles; Nanofluids; Solar vapor; Photothermal conversion properties; RAMAN-SPECTROSCOPY; CONVERSION; GRAPHITE; DRIVEN; WATER; SIZE; ABSORPTION; REDUCTION; MEMBRANES; NANORODS;

D O I：

10.1016/j.applthermaleng.2016.12.054

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Solar vapor generation enabled by nanoparticles is a green, efficient and direct approach to utilize solar energy. In this work, nanocomposites of graphene oxide (GO) and gold (Au) nanoparticles were prepared to generate solar steam under sunlight irradiation. The changes on steam pressure, mass loss and temperature of water were used to study the solar photothermal properties of GO-Au nanocomposites in water, which demonstrated that the synergistic interaction between GO nanosheets and Au nanoparticles played an active role in the photothermal effect of the nanocomposites. Trace of Au nanoparticles (15.6 wt parts per thousand) in the GO nanofluids could signifitantly improve the efficiency of solar vapor generation. More interestingly, the morphology and color of GO-Au nanofluids varied with irradiation times under sunlight, and our results suggested that GO sheets were reduced to graphene sheets. This process of photothermal deoxygenation of GO provides an available solution for preparing graphene sheets under ambient conditions without any reductions, and the solar steam generation method can enable potential applications like sterilization of waste, seawater desalination, and disinfection. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：961 / 968

页数：8

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