基于生物炭的光热水凝胶用于高效太阳能水净化。

Biochar-Based Photothermal Hydrogel for Efficient Solar Water Purification.

机构信息

School of Chemistry and Materials Engineering, Nanjing Polytechnic Institute, 188 Xinle Road, Nanjing 210048, China.

Department of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Road, Yangzhou 225002, China.

出版信息

Molecules. 2023 Jan 24;28(3):1157. doi: 10.3390/molecules28031157.

DOI:10.3390/molecules28031157

PMID:36770825

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9919770/

Abstract

The development of technology for solar interface evaporation has a significant meaning for the sustainable use of water resources in remote regions. However, establishing a solar evaporator with a high evaporation rate and favorable water treatment capabilities remains challenging. In this work, we reported a silver nanoparticle (AgNP)@carbonized cattail (CC)/polyvinyl alcohol (PVA) composite hydrogel (ACPH) membrane. Because of the successfully loaded AgNPs, which have a photothermal synergy with the CC, the ACPH-10 membrane obtained an excellent photothermal conversion performance. Additionally, the hydrophilicity of the ACPH-10 membrane ensures a sustainable water supply which is necessary for the improvement of the evaporation rate. Therefore, the ACPH-10 membrane achieves an evaporation rate of 1.66 kg m h and an efficiency of 88.0%, attributed to the remarkable photothermal conversion and water transmission. More importantly, the membrane exhibits superior purification ability in a variety of sewage. Pollutant removal rates in heavy metal and organic dye sewage have exceeded 99.8%. As a result, the ACPH membrane holds great promise for wastewater recovery and seawater desalination, which can aid in resolving the water crisis issue.

摘要

太阳能界面蒸发技术的发展对于偏远地区水资源的可持续利用具有重要意义。然而，建立具有高蒸发率和良好水处理能力的太阳能蒸发器仍然具有挑战性。在这项工作中，我们报道了一种载银纳米颗粒（AgNP）的碳化香蒲（CC）/聚乙烯醇（PVA）复合水凝胶（ACPH）膜。由于成功负载了 AgNPs，它们与 CC 具有光热协同作用，因此获得的 ACPH-10 膜具有优异的光热转换性能。此外，ACPH-10 膜的亲水性确保了持续的供水，这对于提高蒸发率是必要的。因此，ACPH-10 膜实现了 1.66 kg m h 的蒸发率和 88.0%的效率，这归因于显著的光热转换和水传输。更重要的是，该膜在各种污水中表现出优异的净化能力。重金属和有机染料污水中的污染物去除率均超过 99.8%。因此，ACPH 膜在废水回收和海水淡化方面具有广阔的应用前景，可以帮助解决水危机问题。