A salt pollution self-cleaning Al based solar desalination evaporator fabricated using a picosecond laser

被引:6
作者
Li, Weizhen [1 ,2 ]
Chu, Dongkai [1 ,2 ]
Wang, Qingwei [1 ,2 ]
Yin, Kai [3 ]
Zhang, Honghao [1 ,2 ]
Qu, Shuoshuo [1 ,2 ]
Yao, Peng [1 ,2 ]
机构
[1] Shandong Univ, Ctr Adv Jet Engn Technol CaJET, Sch Mech Engn, Jinan 250061, Peoples R China
[2] Shandong Univ, Key Lab High Efficiency & Clean Mech Manufacture, Minist Educ, Jinan 250061, Peoples R China
[3] Cent South Univ, Sch Phys & Elect, Hunan Key Lab Nanophoton & Devices, Changsha 410083, Peoples R China
基金
中国国家自然科学基金;
关键词
HIGHLY EFFICIENT; GRAPHENE; ABSORPTION; NANOTUBES; COLLECTOR; SPONGE;
D O I
10.1039/d3tc01409f
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Solar desalination is an environmentally friendly, low cost and sustainable process to obtain clean water. As the solar desalination method with the most potential, the solar-driven interfacial evaporator faces the problems of complex preparation procedures, high costs and low efficiencies when processing the evaporator. Here, an efficient and simple method is proposed to process aluminum (Al) based solar interfacial evaporators by using a picosecond laser (Ps). The effect of scan modes from point to line to plane, light intensity and hole distance on the evaporation rate is systematically studied. Compared with the pristine sample, the results of the nano indentation test indicate that the elastic modulus and hardness of the as-prepared sample have rarely decreased. Furthermore, the reflectivity of the laser treated surface within a wide spectral range from ultraviolet to far infrared is reduced. The evaporation rate at 15 kW m(-2) solar intensity is 10.84 kg m(-2) h(-1), and the outdoor evaporation rate can reach 2.325 kg m(-2) h(-1) with a solar intensity of 0.95 kW m(-2). Moreover, the as-prepared surfaces show good salt pollution self-cleaning properties. The ion concentrations (Na+, K+, B3+, Mg2+ and Ca2+ ions) of seawater (Bohai Sea) after desalination are far below the ion concentration limit set by the World Health Organization (WHO) for drinking water. This work provides a fast and simple method for solar desalination, which offers a great opportunity to develop efficient desalination for real world applications.
引用
收藏
页码:11234 / 11242
页数:9
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