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Polyvinyl Alcohol-Supported AuAgNCs-CDs Film as a Selective Sensor for Gas Hydrogen Sulfide Detection in Air.
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2020-05-27 , DOI: 10.1002/marc.202000120 Chun-Xia Zhang 1 , Hong-Wei Li 1 , Yuqing Wu 1
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2020-05-27 , DOI: 10.1002/marc.202000120 Chun-Xia Zhang 1 , Hong-Wei Li 1 , Yuqing Wu 1
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A novel strategy is reported for the synthesis of glutathione (GSH)‐protected bimetallic nanoclusters, Au‐AgNCs@GSH, and its fabrication with polyvinyl alcohol (PVA) into a film sensor for H2S gas detection. Meanwhile, carbon dots (CDs) synthesized from polyethyleneimine (PEI) are introduced as an internal standard to correct the photobleaching of Au‐AgNCs@GSH and uniformity of film. The joining of it greatly improves the chemical and structural stability of the composite film via multi cross‐linking between PEI, PVA, and GSH. The PVA‐AuAgNCs‐CDs film exhibits an emission‐quenching response to H2S gas at atmosphere, which is highly repeatable, fast, sensitive, and can distinguish H2S from other poisonous gases. Finally, the in‐depth mechanism investigations reveal that the quenching response is attributed to decomposition of Au‐AgNCs@GSH and the formation of Au2S and Ag2S in the composite film. As a sensor, the PVA‐supported film combines the functions of fluorescent metal nanoclusters and polymer CDs, providing a portable device for the rapid detection of H2S gas in air.
中文翻译：
聚乙烯醇支持的AuAgNCs-CDs薄膜可作为空气中硫化氢检测的选择性传感器。
据报道，有一种新的策略可以合成谷胱甘肽（GSH）保护的双金属纳米簇Au-AgNCs @ GSH，并用聚乙烯醇（PVA）制成薄膜传感器以检测H 2 S气体。同时，引入了由聚乙烯亚胺（PEI）合成的碳点（CD）作为内标，以校正Au-AgNCs @ GSH的光致漂白和薄膜的均匀性。通过PEI，PVA和GSH之间的多重交联，它的结合大大改善了复合膜的化学和结构稳定性。PVA-AuAgNCs-CDs膜对大气中的H 2 S气体表现出猝灭反应，具有高度重复性，快速，灵敏并可以区分H 2S来自其他有毒气体。最后，深入的机理研究表明，猝灭响应归因于Au-AgNCs @ GSH的分解以及复合膜中Au 2 S和Ag 2 S的形成。作为传感器，PVA支撑的薄膜结合了荧光金属纳米簇和聚合物CD的功能，为快速检测空气中的H 2 S气体提供了一种便携式设备。
更新日期：2020-05-27
中文翻译：
聚乙烯醇支持的AuAgNCs-CDs薄膜可作为空气中硫化氢检测的选择性传感器。
据报道，有一种新的策略可以合成谷胱甘肽（GSH）保护的双金属纳米簇Au-AgNCs @ GSH，并用聚乙烯醇（PVA）制成薄膜传感器以检测H 2 S气体。同时，引入了由聚乙烯亚胺（PEI）合成的碳点（CD）作为内标，以校正Au-AgNCs @ GSH的光致漂白和薄膜的均匀性。通过PEI，PVA和GSH之间的多重交联，它的结合大大改善了复合膜的化学和结构稳定性。PVA-AuAgNCs-CDs膜对大气中的H 2 S气体表现出猝灭反应，具有高度重复性，快速，灵敏并可以区分H 2S来自其他有毒气体。最后，深入的机理研究表明，猝灭响应归因于Au-AgNCs @ GSH的分解以及复合膜中Au 2 S和Ag 2 S的形成。作为传感器，PVA支撑的薄膜结合了荧光金属纳米簇和聚合物CD的功能，为快速检测空气中的H 2 S气体提供了一种便携式设备。
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