State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics , Chinese Academy of Sciences , Shanghai 200050 , P. R. China.
Center of Materials Science and Optoelectronics Engineering , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China.
ACS Appl Mater Interfaces. 2019 Jan 30;11(4):4288-4301. doi: 10.1021/acsami.8b20703. Epub 2019 Jan 18.
A new kind of environmentally friendly filter paper based on ultralong hydroxyapatite nanowires (HAPNWs) and cellulose fibers (CFs) with excellent filtration and adsorption properties has been developed for the application in high-performance water purification. The use of polyamidoamine-epichlorohydrin (PAE) resin increases the wet mechanical strength of the as-prepared HAPNW/CF filter paper. The addition of CFs enhances the mechanical strength of the HAPNW/CF filter paper. Owing to the porous structure and superhydrophilicity of the as-prepared HAPNW/CF filter paper, the pure water flux is as high as 287.28 L m h bar under cross-flow conditions, which is about 3200 times higher than that of the cellulose fiber paper with addition of PAE. More importantly, the as-prepared HAPNW/CF filter paper shows superior performance in the removal of TiO nanoparticles (>98.61%) and bacteria (up to 100%) in water by the size exclusion and blocking effect. In addition, the HAPNW/CF filter paper also exhibits high adsorption capacities for methyl blue (273.97 mg g) and Pb ions (508.16 mg g). The adsorption mechanism of the HAPNW/CF filter paper is investigated. The as-prepared environmentally friendly HAPNW/CF filter paper with both excellent filtration and adsorption properties has promising application in high-performance water purification to tackle the worldwide water scarcity problem.
一种新型的基于超长羟基磷灰石纳米线（HAPNWs）和纤维素纤维（CFs）的环保过滤纸，具有优异的过滤和吸附性能，已被开发用于高性能水净化。使用聚酰胺-表氯醇（PAE）树脂增加了所制备的 HAPNW/CF 滤纸的湿机械强度。CFs 的添加增强了 HAPNW/CF 滤纸的机械强度。由于所制备的 HAPNW/CF 滤纸具有多孔结构和超亲水性，在错流条件下纯水通量高达 287.28 L m h bar，是添加 PAE 的纤维素纤维纸的 3200 倍以上。更重要的是，所制备的 HAPNW/CF 滤纸通过尺寸排除和阻塞效应表现出在去除水中的 TiO2 纳米颗粒（>98.61%）和细菌（高达 100%）方面的优异性能。此外，HAPNW/CF 滤纸对亚甲基蓝（273.97 mg g）和 Pb 离子（508.16 mg g）也表现出高吸附容量。研究了 HAPNW/CF 滤纸的吸附机制。所制备的具有优异过滤和吸附性能的环保 HAPNW/CF 滤纸在高性能水净化中具有广阔的应用前景，可用于解决全球水资源短缺问题。
