Antioxidant and catalytic applications of silver nanoparticles using Dimocarpus longan seed extract as a reducing and stabilizing agent

被引:70
|
作者
Khan, Faheem Ullah [1 ]
Chen, Yongmei [1 ]
Khan, Naeem Ullah [1 ]
Khan, Zia Ul Haq [2 ]
Khan, Arif Ullah [1 ]
Ahmad, Aftab [1 ]
Tahir, Kamran [1 ]
Wang, Lei [1 ]
Khan, Muhammad Riaz [3 ]
Wan, Pingyu [1 ]
机构
[1] Beijing Univ Chem Technol, Sch Sci, Beijing 100029, Peoples R China
[2] Univ Sci & Technol Bannu, Dept Chem, Khyber Pakhtunkhwa 28100, Pakistan
[3] Univ Peshawar, Inst Chem Sci, Peshawar 25120, Khyber Pakhtunk, Pakistan
关键词
Dimocarpus longan seed; Biosynthesis; Silver nanoparticle; 4-Ntirophenol; Methylene blue; Antioxidant activity; BIMETALLIC NANOPARTICLES; PHENOLIC-COMPOUNDS; AG NANOPARTICLES; GREEN SYNTHESIS; METHYLENE-BLUE; GOLD; BIOSYNTHESIS; LEAF; AU; IDENTIFICATION;
D O I
10.1016/j.jphotobiol.2016.09.042
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
In this study, a simple and environmental friendly method was developed for the synthesis of silver nanoparticles (Ag-NPs) using Dimocarpus longan seed extract as a source of reducing and stabilizing agent. The appearance of a surface plasmon resonance peak at 432 nm confirmed the synthesis of silver nanoparticles (UV-visible spectroscopy). The biosynthesized Ag-NPs were face centered cubic structures (XRD) with an approximate particle size of 40 nm (TEM). Optimization study revealed that 10 mL of plant extract (2 mM AgNO3) at 180 min of incubation resulted the optimum product synthesis. Poly-phenolic compounds were majorly involved in the reduction of silver ions into Ag-NPs (FT-IR). The catalytic activities of Ag-NPs were assessed against the photo-catalytic degradation of methylene blue and chemo catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The results indicated that the prepared Ag-NPs have strong chemo catalytic activity with a complete reduction of 4-NP to 4-AP within 10 min. Similarly, Ag-NPs displayed higher photo-catalytic activity (K = 0.12) as compared to commercial Ag-NPs (K = 0.003). In addition, the silver nanoparticles exhibited a promising antioxidant activity in scavenging DPPH radicals. The findings of this study conclude that the biosynthesized Ag-NPs are promising agent possessing strong catalytic and reducing properties. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:344 / 351
页数:8
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