Solid waste and graphite derived solar steam generator for highly-efficient and cost-effective water purification

被引：82

作者：

Gong, Feng ^{[1
]}

Wang, Wenbin ^{[1
]}

Li, Hao ^{[2
]}

Xia, Dawei ^{[3
]}

Dai, Qingwen ^{[2
]}

Wu, Xinlin ^{[2
]}

Wang, Mingzhou ^{[2
]}

Li, Jian ^{[2
]}

Papavassiliou, Dimitrios V. ^{[4
]}

Xiao, Rui ^{[1
]}

机构：

[1] Southeast Univ, Sch Energy & Environm, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 211189, Peoples R China

[2] Univ Elect Sci & Technol China, Sch Commun & Informat Engn, Sch Mat & Energy, Chengdu 611731, Peoples R China

[3] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA

[4] Univ Oklahoma, Sch Chem Biol & Mat Engn, Norman, OK 73019 USA

来源：

APPLIED ENERGY | 2020年 / 261卷

基金：

中国国家自然科学基金;

关键词：

Solid waste; Solar steam generator; Ball-milling graphite; Cellulose fiber; Composite aerogel; Scalable clean water production; ONE SUN; GRAPHENE; NANOCOMPOSITES; DESALINATION; MOLYBDENUM; ABSORPTION; MEMBRANE; SYSTEM;

D O I：

10.1016/j.apenergy.2019.114410

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Utilizing the clean and renewable solar energy to generate steam for wastewater purification or seawater desalination is a promising solution to the worldwide scarcity of fresh water. Herein, we report a highly-efficient, eco-friendly and cost-effective solar steam generator based on ball-milling graphite and cellulose fiber from waste paper. Ball-milling graphite/cellulose fiber composite aerogels are facilely developed via a freeze casting-drying method, endowing a featured vertically aligned porous structure. The fabrication of composite aerogels and the construction of evaporation systems take full advantages of recycled materials, contributing to the low cost and solid waste reclamation. High porosity, strong solar absorption, hydrophilicity and low thermal conductivity of the composite aerogels collectively contribute to a splendid solar evaporation rate of water as high as 1.61 kg m(-2) h(-1), with photothermal efficiency of similar to 90% under one sun illumination (1 kW m(-2)). Quantitative studies reveal the effects of ball-milling graphite/cellulose fiber ratio, ball-milling graphite concentration and thickness of composite aerogels on the solar evaporation rates, suggesting the optimal design of composite aerogels. Furthermore, the cycling stability and the capability for seawater desalination as well as polluted water purification manifest the potential of the composite aerogels to purify diverse water. Outdoor tests show 8-13 L of fresh water could be produced daily by 1 m(2) of composite aerogel.

引用

页数：9