Strapasson Guilherme B, de C Flach Eduarda, Assis Marcelo, Corrêa Silma A, Longo Elson, Machado Giovanna, Santos Jacqueline F L, Weibel Daniel E
Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970, Porto Alegre, RS, Brazil.
Department of Analytical and Physical Chemistry, University Jaume I (UJI), Castelló, 12071, Spain.
Chemphyschem. 2023 Nov 2;24(21):e202300002. doi: 10.1002/cphc.202300002. Epub 2023 Sep 18.
Environmentally friendly methods for silver nanoparticles (AgNPs) synthesis without the use of hazardous chemicals have recently drawn attention. In this work, AgNPs have been synthesized by microwave irradiation using only honey solutions or aqueous fresh pink radish extracts. The concentrations of honey, radish extract, AgNO and pH were varied. AgNPs presented mean sizes between 7.0 and 12.8 nm and were stable up to 120 days. The AgNPs were employed as co-catalyst (TiO @AgNPs) to increase the hydrogen photogeneration under UV-vis and only visible light irradiation, when compared to pristine TiO NPs. The prepared photocatalyst also showed hydrogen generation under visible light. Additionally, AgNPs were used to assemble a nanoplasmonic biosensor for the biodetection of extremely low concentrations of streptavidin, owing to its specific binding to biotin. It is shown here that green AgNPs are versatile nanomaterials, thus being potential candidates for hydrogen photogeneration and biosensing applications.
最近，无需使用危险化学品的银纳米颗粒（AgNPs）绿色合成方法受到了关注。在这项工作中，仅使用蜂蜜溶液或新鲜粉红萝卜水提取物通过微波辐射合成了AgNPs。改变了蜂蜜、萝卜提取物、AgNO₃的浓度和pH值。AgNPs的平均尺寸在7.0至12.8 nm之间，并且在长达120天内保持稳定。与原始TiO₂纳米颗粒相比，AgNPs用作助催化剂（TiO₂@AgNPs）以增加紫外可见和仅可见光照射下的光生氢。制备的光催化剂在可见光下也显示出光生氢。此外，由于AgNPs与生物素的特异性结合，其被用于组装用于生物检测极低浓度链霉亲和素的纳米等离子体生物传感器。此处表明绿色AgNPs是多功能纳米材料，因此是光生氢和生物传感应用的潜在候选材料。
