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首页> 外文期刊>RSC Advances >DNA-binding, antioxidant, H2O2 sensing and photocatalytic properties of biogenic silver nanoparticles using Ageratum conyzoides L. leaf extract
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DNA-binding, antioxidant, H2O2 sensing and photocatalytic properties of biogenic silver nanoparticles using Ageratum conyzoides L. leaf extract

机译：Ageratum conyzoides L.叶提取物对生物银纳米颗粒的DNA结合，抗氧化剂，H2O2感测和光催化性能

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摘要

Green nanotechnology is gaining widespread interest owing to the elimination of harmful reagents and offers a cost-effective synthesis of expected products. In the present study, silver nanoparticles (AgNPs) were synthesized from Ageratum conyzoides leaf extract (ACLE). UV-visible spectrophotometry showing a characteristic SPR peak at 443 nm verified the phytosynthesis of AC-AgNPs. The FTIR spectrum was examined to identify the efficient functional molecules responsible for the reduction of Ag ~(+) to metallic silver (Ag ~(0) ). SEM, TEM and XRD illustrated the formation of crystalline and spherical NPs with a size range of 14–48 nm. EDX data showed the presence of elemental silver with an energy peak at 3 eV. CT-DNA interaction with AC-AgNPs was investigated and the UV absorption spectra revealed a bathochromic effect indicating groove binding. AC-AgNPs showed a strong antioxidant property in a concentration-dependent manner when analyzed by DPPH and ABTS radical scavenging assay. AC-AgNPs were investigated as a SPR-based H _(2) O _(2) sensor, which can provide promising opportunities in medical and environmental fields to detect reactive oxygen species such as H _(2) O _(2) . The catalytic effectiveness of phytosynthesized NPs was also examined within 2 h of exposure for methylene blue degradation under sunlight. There is thus a reasonable potential application of green synthesized AC-AgNPs for the degradation of hazardous synthetic dyes.
机译：由于消除了有害试剂，绿色纳米技术获得了广泛的关注，并提供了具有成本效益的预期产品合成。在本研究中，银粉纳米颗粒（AgNPs）是由香叶香叶提取物（ACLE）合成的。紫外可见分光光度法在443 nm处显示特征SPR峰，证明了AC-AgNP的植物合成。检查了FTIR光谱以鉴定负责将Ag〜（+）还原为金属银（Ag〜（0））的有效功能分子。 SEM，TEM和XRD证实了晶体和球形NP的形成，尺寸范围为14-48 nm。 EDX数据表明存在元素银，其能量峰​​值为3 eV。研究了CT-DNA与AC-AgNPs的相互作用，UV吸收光谱显示出红移效应，表明凹槽结合。当通过DPPH和ABTS自由基清除分析法分析时，AC-AgNPs以浓度依赖的方式显示出强大的抗氧化性能。 AC-AgNPs作为基于SPR的H _（2）O _（2）传感器进行了研究，可为医学和环境领域提供检测H_（2）O _（2）等活性氧的机会。还研究了在阳光下暴露后2小时内植物合成的NP的催化效力，以降解亚甲基蓝。因此，绿色合成的AC-AgNP在降解危险的合成染料方面有合理的潜在应用。

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