Gnidia glauca flower extract mediated synthesis of gold nanoparticles and evaluation of its chemocatalytic potential.
Gnidia glauca flower extract mediated synthesis of gold nanoparticles and evaluation of its chemocatalytic potential.
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DOI：
10.1186/1477-3155-10-17
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发表时间：
2012-05-01
影响因子：
10.2
通讯作者：
Chopade BA
中科院分区：
文献类型：
--
作者：
Ghosh S;Patil S;Ahire M;Kitture R;Gurav DD;Jabgunde AM;Kale S;Pardesi K;Shinde V;Bellare J;Dhavale DD;Chopade BA
由于金纳米粒子在催化、光学、医学诊断和治疗等领域的广泛应用，新的金纳米粒子的合成方法具有极其重要的意义。我们报道了用白背天花提取物(GGFE)合成AuNPs，它的详细表征和对其化学催化潜力的评价。利用紫外可见光谱监测了利用GGFE合成AuNPs的过程，发现合成速度很快，在20 分钟内完成。氯金酸的最佳浓度为0.70 mm，最佳温度为50℃。生物还原的纳米颗粒形态多样，从纳米三角形到纳米六边形，大多数是球形的。用透射电子显微镜、高分辨电子显微镜对金纳米粒子进行了表征。通过扫描电子显微镜的元素图谱、能谱和X射线衍射谱对元素金进行了确证。颗粒大小多为10 nm左右的球形颗粒。然而，较大尺寸的颗粒在50-150 nm之间。生物还原的AuNPs在水相中NaBH4还原4-硝基苯酚合成对氨基苯酚的反应中表现出显著的催化性能。大量的实验证据表明，GGFE可以为各种用途的金纳米颗粒的合成提供一条环境友好的快速合成路线。用GGFE合成的生物质AuNPs具有良好的化学催化活性。
Novel approaches for synthesis of gold nanoparticles (AuNPs) are of utmost importance owing to its immense applications in diverse fields including catalysis, optics, medical diagnostics and therapeutics. We report on synthesis of AuNPs using Gnidia glauca flower extract (GGFE), its detailed characterization and evaluation of its chemocatalytic potential. Synthesis of AuNPs using GGFE was monitored by UV-Vis spectroscopy and was found to be rapid that completed within 20 min. The concentration of chloroauric acid and temperature was optimized to be 0.7 mM and 50°C respectively. Bioreduced nanoparticles varied in morphology from nanotriangles to nanohexagons majority being spherical. AuNPs were characterized employing transmission electron microscopy, high resolution transmission electron microscopy. Confirmation of elemental gold was carried out by elemental mapping in scanning transmission electron microscopic mode, energy dispersive spectroscopy and X-ray diffraction studies. Spherical particles of size ~10 nm were found in majority. However, particles of larger dimensions were in range between 50-150 nm. The bioreduced AuNPs exhibited remarkable catalytic properties in a reduction reaction of 4-nitrophenol to 4-aminophenol by NaBH4 in aqueous phase. The elaborate experimental evidences support that GGFE can provide an environmentally benign rapid route for synthesis of AuNPs that can be applied for various purposes. Biogenic AuNPs synthesized using GGFE exhibited excellent chemocatalytic potential.
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DOI：
10.1016/j.physe.2009.11.081
发表时间：
2010-03-01
影响因子：
3.3
作者：
Philip, Daizy
通讯作者：
Philip, Daizy
影响因子：
10.2
作者：
Barathmanikanth S;Kalishwaralal K;Sriram M;Pandian SR;Youn HS;Eom S;Gurunathan S
通讯作者：
Gurunathan S
影响因子：
3.8
作者：
Das, Ratul Kumar;Gogoi, Nayanmoni;Bora, Utpal
通讯作者：
Bora, Utpal
DOI：
10.1016/s0927-7757(01)01040-8
发表时间：
2002-01-15
影响因子：
5.2
作者：
Pradhan, N;Pal, A;Pal, T
通讯作者：
Pal, T
影响因子：
10.2
作者：
Chatterjee S;Bandyopadhyay A;Sarkar K
通讯作者：
Sarkar K