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Biosynthesis of amino acid functionalized silver nanoparticles for potential catalytic and oxygen sensing applications†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-11-28 00:00:00 , DOI: 10.1039/c7qi00569e Abhishek Chandra 1, 2, 3, 4 , Man Singh 1, 2, 3, 4
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-11-28 00:00:00 , DOI: 10.1039/c7qi00569e Abhishek Chandra 1, 2, 3, 4 , Man Singh 1, 2, 3, 4
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A green approach to the biosynthesis of amino acid functionalized silver nanoparticles (AgNPs) using Neem gum is reported herein. To the best of our knowledge, this is the first attempt at biosynthesizing AgNPs. The AgNPs show good colloidal stability with surfactants and dyes. The reduction of Methylene blue (MB) by SnCl2 in micellar media, and Congo red/4-nitrophenol by NaBH4 validate the high catalytic efficiency of the AgNPs. This is the first report, as far as we know, on a detailed kinetic study of AgNPs catalyzed MB reduction in cationic, anionic and nonionic micellar media. The highest MB reduction rate was observed in anionic micellar medium with tryptophan functionalized AgNPs. The AgNPs were responsible for the backward oxidation of reduced MB in acidic nonionic micellar medium, which is the first ever demonstration of a one-cycle redox MB clock reaction involving silver nanoparticles. The clock reaction elucidated the potential use of the AgNPs as low-cost sensors for oxygen leakage in vacuum-packed food packages, and for creating an oxygen deficient environment in acidic aqueous and micellar media, where catalyst poisoning by O2 prevails. The deactivation of the catalytic activity of tryptophan functionalized AgNPs observed during the Congo red and 4-nitrophenol reduction may find application in catalytic reduction where improved selectivity is required. With the possibility of the large-scale production of the AgNPs on an economic platform, the AgNPs may thus hold great promise in effective and eco-friendly wastewater treatment, with potential application in oxygen sensing.
中文翻译：
氨基酸官能化的银纳米颗粒的生物合成，可用于潜在的催化和氧传感应用†
本文报道了使用印em胶生物合成氨基酸官能化的银纳米颗粒（AgNPs）的绿色方法。据我们所知，这是生物合成AgNP的首次尝试。AgNPs与表面活性剂和染料表现出良好的胶体稳定性。胶束介质中SnCl 2还原亚甲基蓝（MB），NaBH 4还原刚果红/ 4-硝基苯酚验证了AgNPs的高催化效率。据我们所知，这是关于AgNP催化阳离子，阴离子和非离子胶束介质中MB还原的详细动力学研究的第一份报告。在具有色氨酸官能化AgNP的阴离子胶束培养基中观察到最高的MB还原速率。AgNPs负责在酸性非离子胶束介质中还原MB的向后氧化，这是涉及银纳米颗粒的单循环氧化还原MB时钟反应的首次证明。时钟反应阐明了AgNPs作为低成本传感器的潜在用途，该传感器可用于真空包装食品包装中的氧气泄漏，以及在酸性水溶液和胶束介质中产生氧气不足的环境，在该环境中催化剂会被O 2毒化占上风。在刚果红和4-硝基苯酚还原过程中观察到的色氨酸官能化AgNPs催化活性的失活可用于需要改进选择性的催化还原中。随着在经济平台上大规模生产AgNPs的可能性，AgNPs有望在有效和生态友好的废水处理中具有广阔的前景，并在氧传感领域具有潜在的应用。
更新日期：2017-11-28
中文翻译：
氨基酸官能化的银纳米颗粒的生物合成，可用于潜在的催化和氧传感应用†
本文报道了使用印em胶生物合成氨基酸官能化的银纳米颗粒（AgNPs）的绿色方法。据我们所知，这是生物合成AgNP的首次尝试。AgNPs与表面活性剂和染料表现出良好的胶体稳定性。胶束介质中SnCl 2还原亚甲基蓝（MB），NaBH 4还原刚果红/ 4-硝基苯酚验证了AgNPs的高催化效率。据我们所知，这是关于AgNP催化阳离子，阴离子和非离子胶束介质中MB还原的详细动力学研究的第一份报告。在具有色氨酸官能化AgNP的阴离子胶束培养基中观察到最高的MB还原速率。AgNPs负责在酸性非离子胶束介质中还原MB的向后氧化，这是涉及银纳米颗粒的单循环氧化还原MB时钟反应的首次证明。时钟反应阐明了AgNPs作为低成本传感器的潜在用途，该传感器可用于真空包装食品包装中的氧气泄漏，以及在酸性水溶液和胶束介质中产生氧气不足的环境，在该环境中催化剂会被O 2毒化占上风。在刚果红和4-硝基苯酚还原过程中观察到的色氨酸官能化AgNPs催化活性的失活可用于需要改进选择性的催化还原中。随着在经济平台上大规模生产AgNPs的可能性，AgNPs有望在有效和生态友好的废水处理中具有广阔的前景，并在氧传感领域具有潜在的应用。
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