Solar Photothermal Disinfection using Broadband-Light Absorbing Gold Nanoparticles and Carbon Black
Solar Photothermal Disinfection using Broadband-Light Absorbing Gold Nanoparticles and Carbon Black
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DOI：
10.1021/acs.est.7b04442
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发表时间：
2018-01-02
影响因子：
11.4
通讯作者：
Kim, Jae-Hong
中科院分区：
文献类型：
--
作者：
Loeb, Stephanie;Li, Chuanhao;Kim, Jae-Hong
简单的热处理，也许是全球公认的使用点水消毒方法，似乎对所有主要病原体都有效，但散装水煮沸既不节能也不可持续。在此，我们提出了太阳能-热转换纳米材料的第一个应用，通过应用Au纳米棒、炭黑和Au纳米棒-炭黑复合材料作为光吸收剂，用于直接灭活饮用水中的细菌和病毒。由于具有跨越可见光和近红外波长的宽吸收带，在足够的浓度下，这些纳米颗粒诱导多个散射事件，增加光子吸收概率并将光集中在小的空间域内，导致局部的强烈加热，从而使紧邻的微生物失活。走向实际的设备设计，我们已经开发出一种简便的硅烷固定化方法来制造薄膜与密集堆积层的光热纳米材料。我们的研究结果表明，在用模拟太阳光照射时，这些膜可以热灭活细菌和病毒，如通过灭活替代生物大肠杆菌K-12和噬菌体MS 2和PR 772所证明的。
A simple heat treatment, perhaps the most globally recognized point-of-use water sterilization method, is seemingly effective against all major pathogens of concern, but bulk water boiling is not energy efficient or sustainable. Herein, we present the first application of solar-to-thermal converting nanomaterials for the direct inactivation of bacteria and viruses in drinking water through the application of Au nanorods, carbon black, and Au nanorod-Carbon black composite materials as light absorbers. With broad absorption bands spanning the visible and near-infrared wavelengths, at sufficient concentrations, these nanoparticles induce multiple scattering events, increasing photon absorption probability and concentrating the light within a small spatial domain) leading to localized, intense heating that inactivates microorganisms in close proximity. Moving toward practical device design, we have developed a facile silane immobilization approach to fabricate films with densely packed layers of photothermal nanomaterials. Our results suggest that upon irraditaion with simulated solar light, these films can thermally inactivate bacteria and viruses, as demonstrated through the inactivation of surrogate organisms Escherichia coli K-12, and bacteriophages MS2 and PR772.