Commercial Gel-Type Ion Exchange Resin Enables Large-Scale Production of Ultrasmall Nanoparticles for Highly Efficient Water Decontamination
Commercial Gel-Type Ion Exchange Resin Enables Large-Scale Production of Ultrasmall Nanoparticles for Highly Efficient Water Decontamination
复制标题
商用凝胶型离子交换树脂可大规模生产超小纳米粒子，实现高效水净化
DOI：
10.1016/j.eng.2021.09.010
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发表时间：
2023-05-30
期刊：
影响因子：
12.8
通讯作者：
Pan, Bingcai
中科院分区：
文献类型：
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作者：
Cheng, Sikai;Qian, Jieshu;Pan, Bingcai
纳米技术在先进的水处理中提供了创新的解决方案;然而，其应用受到具有非凡去污反应性的超小（< 5 nm）纳米颗粒（NP）的挑战性大规模生产以及在工程中处理这种微小NP的困难的限制。为了解决这些挑战，我们提出了一个简单的路线，使用商业凝胶型阴离子交换树脂N201作为主机合成超小型纳米粒子。N201是用季铵基团改性的毫米级聚（苯乙烯-二乙烯基苯）珠。水合氧化铁（HFO）、水合氧化锰（HMO）、硫化镉（CdS）和零价铁（ZVI）的纳米颗粒通过在N201中的简单的包埋-沉淀而获得，并且所有的NPs具有小于5 nm的超小尺寸。中试规模的生产试验表明，合成系统可以按比例扩大，以制备大量的亚5 nm HFO。关于潜在的机制，每个N201珠含有连续的水相，允许反应物的快速扩散（从珠表面扩散到中心为7秒），导致突发成核以产生具有窄尺寸分布的超小NP。此外，交联的聚合物链提供了有限的空间（直径< 5 nm）以防止所形成的NP的过度生长。由于毫米N2 O 1主体，所得纳米复合材料可应用于流通系统。批和柱吸附试验表明，显着增强的吸附性能的超小HFO对砷（III/V）比类似的17 nm的类似物。这项研究可以促进纳米技术在实际水处理中的广泛应用。(c)2021年的走廊。由爱思唯尔有限公司代表中国工程院和高等教育出版社有限公司出版。这是一个在CC BY-NC-ND许可证下的开放获取文章（http：//creativecommons.org/licenses/by-nc-nd/4.0/）。
Nanotechnology presents innovative solutions in advanced water treatment; however, its application is limited by the challenging large-scale production of ultrasmall (< 5 nm) nanoparticles (NPs) with extraordinary decontamination reactivity and the difficulty of handling such tiny NPs in engineering. To address these challenges, we propose a straightforward route for synthesizing ultrasmall NPs using the commercial gel-type anion exchange resin N201 as the host. N201 is a millimeter-scale poly(styrene-codivinylbenzene) bead modified with quaternary ammonium groups. Nanoparticles of hydrated ferric oxide (HFO), hydrated manganese oxide (HMO), cadmium sulfide (CdS), and zero-valent iron (ZVI) were obtained through simple impregnation-precipitation in N201, and all of the NPs possessed an ultrasmall size of sub-5 nm. A pilot-scale production assay indicated that the synthetic system could be enlarged proportionally to prepare massive sub-5 nm HFO. Regarding the underlying mechanism, each N201 bead contained a continuous water phase, allowing the rapid diffusion of the reactants (7 s for diffusion from the bead surface to the center), resulting in burst nucleation to produce ultrasmall NPs with a narrow size distribution. Moreover, the crosslinked polymer chains provided a confined space (< 5 nm diameter) to prevent the excessive growth of the formed NPs. Owing to the millimetric N201 host, the resultant nanocomposite can be applied in flow-through systems. The batch and column adsorption assays demonstrate the dramatically enhanced adsorption performance of the ultrasmall HFO toward As(III/V) than the similar to 17 nm analogs. This study can advance the widespread use of nanotechnology in practical water treatment. (c) 2021 THE AUTHORS. Published by Elsevier LTD on behalf of Chinese Academy of Engineering and Higher Education Press Limited Company. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).