TY  - EJOU
AU  - Qiu, Ziyang 
AU  - Yang, Hanjun 

TI  - Graphite/Polyvinyl Alcohol Hydrogels with Fluoride and Iodine Deionization for Solar-Driven Interfacial Evaporation
T2  - Journal of Polymer Materials

PY  - 2024
VL  - 41
IS  - 4
SN  - 0976-3449

AB  - Hydrogels are emerging as promising candidates for solar-driven interfacial evaporation in water purification. Our research introduces a graphite polyvinyl alcohol hydrogel (GPVA) evaporator designed as a photothermal conversion interface, showcasing high performance with an evaporation rate of 2.43 kg m<sup>−2</sup> h<sup>−1</sup> and an efficiency of 91.9% under solar irradiance of 1 kW m<sup>−2</sup>. The layered graphite structure of the GPVA hydrogel enhances its ion and dye adsorption capabilities, effectively removing fluoride, iodine, and other contaminants from water. In cyclic evaporation tests, the GPVA hydrogel evaporator demonstrated remarkable stability and long-term durability, maintaining an evaporation rate of 2.43 ± 0.11 kg m<sup>−2</sup> h<sup>−1</sup>. The straightforward preparation of the GPVA hydrogel positions it as a compelling candidate for treating seawater and wastewater containing specific ions, presenting significant potential for water purification applications.
KW  - Polyvinyl alcohol; graphite; hydrogel; solar interfacial evaporation; deionization

DO  - 10.32604/jpm.2024.057953