In situ and facile green synthesis of gold-reduced graphene oxide using betel leaf extract for catalytic reduction of 4-nitrophenol
Basavaiah Chandu , Syed Akhil, Sriram Mosali, Basavaiah Chandu Dept of Nanotechnology, Acharya Nagarjuna University, Guntur, India
The current work reports an environmentally friendly, novel and facile green synthesis of gold-reduced graphene oxide (Au-RGO) using Betel leaf extract as both reducing and stabilizing agent and its catalytic properties has been explored for the reduction of 4-nitrophenol. The phytochemical (hydroxyl groups) contents in the leaf extract are liable for the reduction of gold and graphene oxide. The subsequent Au-RGO nanocomposite were characterized by UV-Vis absorbance spectroscopy for its optical properties, Fourier transform infrared spectroscopy analysis to study the information about the functional groups, Raman spectroscopy is used for confirm of reduced graphene oxide from graphene oxide. Its structural properties are investigated using powder X-ray diffraction. Field emission scanning contained about 10 wt% of Au and the Au-nanoparticles were enlivened on the surface of the reduced graphene oxide sheet with average diameter size of 25±1.2 nm. The Au-RGO nanocomposite electron microscopy and High resolution- transmission electron microscopy are used to contemplate the size and morphological information. The resultant Au-RGO nanocomposite exhibits as a decent catalytic activity in the reduction of 4-Nitrophenol to 4- aminophenol by NaBH 4 was demonstrated at an ambient condition. References 1. Basavaiah Chandu, Mosali VSS, Mullamuri B, Bollikolla HB. A Facile Green Reduction of Graphene Oxide Using Annona Squamosa Leaf Extract. Carb. Lett. 2017, 21, 74-80. 2. Cao X, Yan S, Hu F, Wang J, Wan Y, Sun B, Xiao Z. Reduced graphene oxide/gold nanoparticle aerogel for catalytic reduction of 4-nitrophenol. RSC advances. 2016;6(68):64028-38. 3. Qiu Y, Wang Z, Owens AC, Kulaots I, Chen Y, Kane AB, Hurt RH. Antioxidant chemistry of graphene-based materials and its role in oxidation protection technology. Nanoscale. 2014;6(20):11744-55. 4. Basavaiah Chandu, Nurbasha S, Bollikolla HB. A Facile Green Reduction for Graphene ‐ Silver Nanocomposite Using Betel Leaf Extract for the Photocatalytic Degradation of Water Pollutants. ChemistrySelect 2017, 2, 11172–11176.
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