Engineering trace AuNPs on monodispersed carbonized organosilica microspheres drives highly efficient and low-cost solar water purification,Journal of Materials Chemistry A

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Engineering trace AuNPs on monodispersed carbonized organosilica microspheres drives highly efficient and low-cost solar water purification
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-06-15 , DOI: 10.1039/d0ta03850d
Ranran Cui _{1,

2,

3,

4} , Jilei Wei _{1,

2,

3,

4} , Cui Du _{1,

2,

3,

4} , Shasha Sun _{4,

5,

6,

7} , Chen Zhou _{8,

9,

10,

11} , Huaiguo Xue _{1,

2,

3,

4} , Shengyang Yang _{1,

2,

3,

4}

Affiliation

Gold nanoparticles (AuNPs) have been recently utilized in solar water evaporation due to their favorable photothermal conversion efficiency resulting from localized surface plasmon resonance (LSPR). However, the exorbitant price of Au severely hinders its extensive application for water purification in practice. This work reports a simple interfacial reaction for in situ engineering a trace amount of AuNPs on carbonized organosilica (c-silica) microspheres toward water desalination and decontamination. With the deposition of AuNPs@c-silica hybrids onto filter fiber paper (FFP), the as-prepared AuNP@c-silica/FFP (GSP) membrane can achieve a superior solar thermal conversion efficiency up to 94.6% under only one sun irradiation with Au usage of only 25 μg cm⁻². The high solar thermal conversion efficiency of the GSP membrane can be attributed to the synergistic photothermal effect between AuNPs and c-silica, which is verified by the COMSOL simulation. The GSP membrane also possesses a high elimination capability that allows it to produce drinkable water from seawater and wastewater. Additionally, the reliability evaluation indicates that the microstructures and performance of AuNPs@c-silica hybrids are invariant before and after reclamation. This technically easy route offers a low-cost, reusable, and highly efficient membrane for solar water purification that can be envisaged for practical use.

中文翻译：

单分散碳化有机硅微球上的工程痕量AuNP驱动高效和低成本的太阳能净水

金纳米颗粒（AuNPs）由于其因局部表面等离振子共振（LSPR）产生的良好的光热转换效率，最近已用于太阳能蒸发中。然而，金的高昂价格严重地阻碍了其在实践中在水净化中的广泛应用。这项工作报告了一个简单的界面反应，用于原位工程化碳化有机硅（c-silica）微球上的痕量AuNPs对水脱盐和去污。通过将AuNPs @ c-二氧化硅杂化物沉积到滤纸（FFP）上，制备的AuNP @ c-二氧化硅/ FFP（GSP）膜仅在一次阳光照射下即可实现高达94.6％的优异太阳热转换效率。 Au用量仅为25μgcm ^-2。GSP膜的高太阳热转换效率可以归因于AuNP和c-二氧化硅之间的协同光热效应，这已通过COMSOL仿真得到了验证。GSP膜还具有很高的清除能力，使其可以从海水和废水中产生饮用水。此外，可靠性评估表明AuNPs @ c-二氧化硅杂化体的微观结构和性能在填海之前和之后都是不变的。这种技术上容易实现的途径为太阳能净水提供了一种低成本，可重复使用且高效的膜，可以将其实际应用。

更新日期：2020-07-07

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