<![CDATA[Flower-like Bi <ce:inf loc='post'>2</ce:inf>O <ce:inf loc='post'>2</ce:inf>CO <ce:inf loc='post'>3</ce:inf>/NiFe <ce:inf loc='post'>2</ce:inf>O <ce:inf loc='post'>4</ce:inf> magnetically recoverable nanocomposites: Preparation, characterization and their catalytic application in the reduction of 4-nitrophenol to 4-aminophenol]]>
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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >2O 2CO 3/NiFe 2O 4 magnetically recoverable nanocomposites: Preparation, characterization and their catalytic application in the reduction of 4-nitrophenol to 4-aminophenol]]>
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2O 2CO 3/NiFe 2O 4 magnetically recoverable nanocomposites: Preparation, characterization and their catalytic application in the reduction of 4-nitrophenol to 4-aminophenol]]>

机译：<！[CDATA [CDATA [花样BI 2 O 2 CO 3 / NIFE 2 O 4 磁性 可恢复的纳米复合材料：制备，表征及其在4-硝基苯酚的还原至4-氨基苯酚中的催化应用]]]>

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AbstractIn this work, a series of novel flower–like Bi2O2CO3/NiFe2O4nanocomposites (denoted as BOC/NFO) with different amounts of NiFe2O4(NFO) content was successfully synthesized for the first time by a simple and feasible hydrothermal method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS), vibrating sample magnetometer (VSM), and N2adsorption–desorption analysis were utilized to analyze the structure, morphology, size, phase composition, optical and magnetic properties of the synthesized nanocomposites. The results demonstrated the successful deposition of uniform NFO nanoparticles onto the surface of flower–like BOC nanostructures. Then, the catalytic activity of magnetic BOC/NFO nanocamposites was investigated for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by using sodium borohydride (NaBH4) in aqueous solution and at room temperature. The results showed that BOC/NFO15 nanocamposite with 15 %wt. NFO exhibited the best performance in the reduction of 4-NP with 100% conversion into the corresponding amino derivative within 26?min with rate constant equal 0.14?min?1. The effect of catalyst dosage was also investigated on the efficiency of reduction process. It was found that the present catalyst could also catalyze the complete reduction of 2-nitrophenol (2-NP) and 4-nitroaniline (4-NA) and 2-nitroaniline (2-NA) to corresponding amines within short reaction times of 14–27?min. In addition, deposition of magnetic NFO nanoparticles onto the surface of the BOC nanoflowers proved to be an effective way to separate catalyst easily from the reaction system with an external magnetic field, allowing them to be reused in multiple cycles without any change in structure.Graphical abstractDisplay OmittedHighlights?Novel magnetic nanocomposites Bi2O2CO3/NiFe2O4was synthesized by hydrothermal method.?These magnetic nanocomposites were fully characterized by various technique.?The catalytic activity of Bi2O2CO3
机译：<！[CDATA [ 抽象 在这项工作中，一系列新颖的花朵类似BI 2 o 2 co <​​ce：inf loc =“post”> 3 / nife 2> 2 O 4 纳米复合材料（表示为BOC / NFO），具有不同的NIFE 2 O 4 （NFO）含量首次通过简单而可行的水热方法成功地合成。 X射线衍射（XRD），傅里叶变换红外（FT-IR）光谱，扫描电子显微镜（SEM），能量分散X射线光谱（EDX），透射电子显微镜（TEM），原子力显微镜（AFM），X. -Ray光电子体光谱（XPS），UV-VI扩散反射光谱（DRS），振动样品磁力计（VSM）和N 2 吸附 - 解吸分析分析合成纳米复合材料的结构，形态，大小，相组合物，光学和磁性。结果证明，成功地将均匀的NFO纳米颗粒沉积到花状BOC纳米结构的表面上。然后，研究磁性BOC / NFO纳米吸管的催化活性通过使用硼氢化钠还将4-硝基苯酚（4-NP）至4-氨基苯酚（4-AP）还原（NABH 在水溶液和室温下4 ）。结果表明，BOC / NFO15纳米烷基纳米罐，15％wt。 NFO在速率常数等于0.14？min：sup =“post” 。还研究了催化剂剂量的效果对还原过程的效率进行了研究。发现本催化剂还可以在短时间内催化2-硝基苯酚（2-NP）和4-硝基苯胺（4-Na）和2-硝基苯胺（2-Na）的完全还原到相应的胺，在短时间内为14- 27？分钟。此外，磁性NFO纳米颗粒沉积到BOC纳米射线的表面上，证明是一种从具有外部磁场的反应系统分离催化剂的有效方法，使它们能够在多循环中重复使用而没有任何结构变化。< / ce：简单 - 段> 图形抽象 显示省略 亮点 ？ 新型磁纳米复合材料BI 2 O 2 CO 3 / NIFE 2 O 4 由水热合成方法。 ？ 这些磁性纳米复合材料通过各种技术完全表征。 ？ bi 2 o 2 co <​​co 3

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