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Highly dispersible Fe3O4‐Ag@OPO(OH)2 nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol
Journal of the Chinese Chemical Society ( IF 1.8 ) Pub Date : 2020-07-28 , DOI: 10.1002/jccs.202000093
Mahsa Hojjati 1 , Esmaiel Soleimani 1
Affiliation  

In this study, Fe3O4‐Ag@OPO(OH)2 nanocomposites (NCs) were synthesized using Camellia sinensis leaf extract. This herbal extract was utilized to reduce silver(I) ions to silver nanoparticles (NPs) on the surface of magnetite. The solution color changes from bright to dark, along with the new absorption band at λmax 410 nm confirms the deposition of nanosilver on the magnetite surface. The X‐ray powder diffraction (XRD) analysis was used to characterize the diffraction patterns of silver and magnetite phases and to calculate the average size of the crystallites being 21 nm. The fourier transform infrared (FT‐IR) spectra of green prepared of Fe3O4‐Ag@OPO(OH)2 NCs illustrated the functional group peaks of flavonoids and other phenolic compounds. The energy dispersive X‐ray (EDS) spectra of Fe3O4‐Ag@OPO(OH)2 NCs proved the presence of localized elements, which are incorporated into prepared NCs containing Ag, Fe, O, and P. The vibrating‐sample magnetometer (VSM) analysis indicated that the magnetic nature of Fe3O4‐Ag@OPO(OH)2 NCs is less than Fe3O4 NPs, which is attributed to nonmagnetic nature of Ag NPs and covering the magnetite surface by layers of silver and phosphate. The eco‐friendly synthesized Fe3O4‐Ag@OPO(OH)2 NCs exhibited high catalytic activity toward reducing p‐nitrophenol.

中文翻译:

高分散性的Fe3O4-Ag @ OPO(OH)2纳米复合材料,是一种新型的环保型磁性可回收催化剂,用于还原对硝基苯酚

在这项研究中,使用茶叶提取物合成了Fe 3 O 4 -Ag @ OPO(OH)2纳米复合材料。该草药提取物用于将银(I)离子还原为磁铁矿表面上的银纳米颗粒(NP)。溶液颜色从明亮处变为暗,与新的吸收带沿λ最大410nm的纳米银确认的磁铁矿表面上的沉积。X射线粉末衍射(XRD)分析用于表征银和磁铁矿相的衍射图,并计算微晶的平均尺寸为21 nm。Fe 3 O 4制备的绿色的傅立叶变换红外光谱(FT-IR)‐Ag @ OPO(OH)2 NCs显示了类黄酮和其他酚类化合物的官能团峰。Fe 3 O 4 -Ag @ OPO(OH)2 NC的能量色散X射线(EDS)光谱证明存在局部元素,这些元素被掺入已制备的包含Ag,Fe,O和P的NC中。样品磁强计(VSM)分析表明,Fe 3 O 4 ‐Ag @ OPO(OH)2 NCs的磁性小于Fe 3 O 4 NPs,这归因于Ag NPs的非磁性,并被层状磁铁矿覆盖银和磷酸盐。环保的合成Fe 3 O 4‐Ag @ OPO(OH)2 NCs对还原硝基苯酚具有很高的催化活性。
更新日期:2020-07-28
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