文献类型：期刊文献

英文题名：A self-floating hydrogel for heavy metal recovery from water

作者：Hu, Kami[1];He, Hui[2,3];Ma, Zhengyuan[1];Chen, Ruoyang[4];Yang, Yunchu[2]

机构：[1]Zhejiang Sci Tech Univ, Sch Fash Design & Engn, Hangzhou 310018, Zhejiang, Peoples R China;[2]Zhejiang Sci Tech Univ, Fash Design Coll Ist Marangoni, Sch Int Fash Technol, Hangzhou 310018, Zhejiang, Peoples R China;[3]Zhejiang Prov Innovat Ctr Adv Text Technol, Shaoxing 312000, Zhejiang, Peoples R China;[4]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2025

卷号：690

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20250617811970);WOS:【SCI-EXPANDED(收录号:WOS:001423087800001)】；

基金：This work was supported by the Zhejiang Provincial Natural Science Foundation of China (LY17E06007) , the Shanghai Pujiang Program (No.23PJ1401800) , the Science Foundation of Zhejiang Sci-Tech Uni-versity (ZSTU) (No. 22192136-Y) and Scientific Research Fund of Zhe-jiang Provincial Education Department (No. Y202354119) .

语种：英文

外文关键词：Self-floating hydrogel; Hydrophobic surfaces; Heavy metal recovery; Wastewater treatment

摘要：Heavy metal pollution is a serious environmental problem endangering the ecosystem and human health. The removal of heavy metals becomes crucial for water treatment. However, from the point of view of thermodynamics, it is a big challenge to transform the heavy metals from the homogeneous state in bulk liquid to the heterogeneous state in a collection area. Here we show a facile strategy of collecting heavy metals from bulk liquid to water surface by engineering a self-floating hydrogel. We construct the hydrophobic surfaces on the polyacrylamide/polyvinylpyrrolidone double-network hydrogel by simply coating with silica nanoparticles (SiNPs). Both of our experiments and computation analysis indicate that the SiNPs-coated hydrogel can self-float stably on the water surface, due to the balance between the interfacial tension, buoyancy force, and gravitational force. We further show that the self-floating hydrogel can effectively adsorb various heavy metals, i.e., Cu2+, Fe3+, and Ni2+, from water and enrich them inside the hydrogel, which decrease the concentration of heavy metals in water. Our findings present new insights into the hydrophobicity-induced self-floatation of soft matters on bulk liquid and provide a novel strategy for heavy metal efficient recovery, promising great applications in chemical and biosensors, drug delivery and water purification.