A strategy of heterogeneous polyurethane-based sponge for water purification: Combination of superhydrophobicity and photocatalysis to conduct oil/water separation and dyes degradation.
A strategy of heterogeneous polyurethane-based sponge for water purification: Combination of superhydrophobicity and photocatalysis to conduct oil/water separation and dyes degradation.
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DOI：
10.1016/j.jcis.2020.12.122
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发表时间：
2021-01
影响因子：
9.9
通讯作者：
Shanying Sui;Huafeng Quan;Yukun Hu;Minmin Hou;Shaoqiang Guo
中科院分区：
文献类型：
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作者：
Shanying Sui;Huafeng Quan;Yukun Hu;Minmin Hou;Shaoqiang Guo
顽固油和有机颜料的扩散已成为严重的环境污染问题。超疏水性和光催化的结合有望提供一种高效、经济、简单的解决方案。本文采用四氧化二铁负载（Fe3O4@PU）、聚多巴胺固定（PDA-Fe3O4@PU）、十八胺接枝（ODA-Fe3O4@PU）和二硫化钼负载（MoS2-ODA-Fe3O4@PU）的策略，制备了一种超疏水超亲脂聚氨酯（PU）基海绵。结果表明，MoS2-ODA-Fe3O4@PU海绵具有优异的超疏水性（最大水接触角为161.64°），优异的吸油能力（60-109 wt/wt），极端环境稳定性强，油水分离能力强。此外，负载二硫化钼的海绵在光源下分解甲基橙和亚甲基蓝的效果良好，具有超疏水性和光催化作用的多相聚氨酯基海绵（上为MoS2-ODA-Fe3O4@PU，下为MoS2@PU）的双功能净化系统可以同时分离油和分解亚甲基蓝。
The diffusion of stubborn oils and organic pigments has become a severe environmental pollution problem. Promisingly, the combination of superhydrophobicity and photocatalysis is expected to provide an efficient, economical and simple solution. In this paper, a kind of superhydrophobic and super-lipophilicity polyurethane (PU)-based sponge was reported by a strategy of undergoing ferric tetroxide loading (Fe3O4@PU), polydopamine fixation (PDA-Fe3O4@PU), octadecylamine grafting (ODA-Fe3O4@PU) and molybdenum disulfide loading (MoS2-ODA-Fe3O4@PU) successively. The results show that the MoS2-ODA-Fe3O4@PU sponge exhibits outstanding superhydrophobicity (with maximum water contact angle of 161.64°), excellent oil absorption capacity (60–109 wt/wt), robust stability in extreme environments and great oil/water separation ability. In addition, the MoS2-loaded sponge demonstrates desirable outcomes in decomposing methyl orange and methylene blue under light source, and a dual-functional purification system with a heterogeneous polyurethane-based sponge (the upper part is MoS2-ODA-Fe3O4@PU and the bottom part is MoS2@PU) endowed with superhydrophobicity and photocatalysis can purify water by separating oils and decomposing methylene blue simultaneously.