High catalytic activity of a new Ag phosphorus ylide complex supported on montmorillonite: synthesis, characterization, and application for room temperature nitro reduction
作者:Kazem Karami、Mahzad Rahimi、Mohammad Dinari
DOI:10.1007/s13738-017-1230-x
日期:2018.2
activity in the reduction in aromaticnitrocompounds; it displayed the high catalytic activity. Factors such as catalyst amount, solvent, temperature and reaction time were all systematically investigated to elucidate their effects on the yield of catalytic reduction in nitroarenes. This catalytic system exhibited high activity toward aromaticnitrocompoundsunder mild conditions. The catalyst was
Experimental and quantum chemical study on nano-copper immobilized on magnetic graphitic carbon nitride core shell particles; a reusable heterogeneous catalyst toward reduction of nitro arenes
Abstract A new magnetic material, which named CuFe2O4@SiO2@g-C3N4/Cu with a core/shell morphology has been designed and synthesized. For the first time ever, the mixture of carbon and g-C3N4 layer was applied as an effective linker for immobilization of Cu metal on the catalyst. The physiochemical properties of the catalyst were identified by XRD, FT-IR, VSM, FE-SEM and TEM characterization techniques
摘要 设计合成了一种具有核壳形貌的新型磁性材料CuFe2O4@SiO2@g-C3N4/Cu。有史以来第一次,碳和 g-C3N4 层的混合物被用作将 Cu 金属固定在催化剂上的有效连接剂。通过XRD、FT-IR、VSM、FE-SEM和TEM表征技术对催化剂的理化性质进行了鉴定。在 NaBH4 存在下,在 55 °C 的水中研究硝基化合物还原为相应的胺。量子化学研究表明,在 g-C3N4 层中加入 Cu 原子会通过改变键长和键序引起轻微的结构变形,而且 g-C3N4 的 Cu 原子和氮原子的相互作用类型主要是静电性质的.
A novel magnetic starch nanocomposite as a green heterogeneous support for immobilization of Cu nanoparticles and selective catalytic application in eco-friendly media
作者:Atefeh Nasiri、Mohammad A. Khalilzadeh、Daryoush Zareyee
DOI:10.1080/24701556.2021.1980031
日期:——
analysis (TG-DTA), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM) analytical techniques. The nanocatalyst was used in selective oxidation of benzyl alcohol (BzOH) into benzaldehyde (BzH) by hydrogen peroxide under solvent-free reaction conditions. The synthesized magnetically recoverable nanocatalyst also showed high activity in the reduction of 4-nitrophenol (4-NP)
摘要 在这项工作中,针茅提取物介导了铜纳米颗粒 (Cu NPs) 的合成及其在纳米淀粉包覆的 Fe 3 O 4表面上的固定化。制备的纳米催化剂(Cu NPs@Fe 3 O 4-nanostarch) 通过傅里叶变换红外光谱 (FTIR)、X 射线衍射 (XRD)、能量色散 X 射线光谱 (EDS)、场发射扫描电子显微镜 (FESEM)、热重-差热分析 (TG-DTA) 进行表征)、透射电子显微镜 (TEM) 和振动样品磁强计 (VSM) 分析技术。该纳米催化剂用于在无溶剂反应条件下通过过氧化氢将苯甲醇 (BzOH) 选择性氧化为苯甲醛 (BzH)。合成的磁性可回收纳米催化剂在还原 4-硝基苯酚 (4-NP)、2,4-二硝基苯肼 (2,4-DNPH)、刚果红 (CR)、亚甲蓝 (MB) 和六氰基高铁酸钾方面也显示出高活性(III) (K 3 [Fe(CN) 6 ]) 在水中使用 NaBH4作
Green synthesis of a Cu/MgO nanocomposite by <i>Cassytha filiformis</i> L. extract and investigation of its catalytic activity in the reduction of methylene blue, congo red and nitro compounds in aqueous media
作者:Mahmoud Nasrollahzadeh、Zahra Issaabadi、S. Mohammad Sajadi
DOI:10.1039/c7ra13491f
日期:——
This work reports the green synthesis of a Cu/MgO nanocomposite using Cassytha filiformis L. extract as a reducing agent without stabilizers or surfactants.
Catalytic reduction of nitroarenes and degradation of dyes at room temperature by an efficient NNN pincer palladium catalyst based on the magnetic amino-triazole-modified chitosan
作者:F. Rafiee、M. Rezaee
DOI:10.1016/j.reactfunctpolym.2022.105208
日期:2022.3
a NNN pincer ligand to facilitate palladium immobilization. FT-IR, FE-SEM, EDX, XRD, VSM, ICP, BET, and TGA analyses were used to characterize the synthesized nanocomposite (Fe3O4@Triazole-CS@NNN-Pd). Then, its catalytic activity in the reduction of a wide variety of nitroaromatic compounds at room temperature was investigated using sodium borohydride as a reducing agent, as well as the degradation
在这项研究中,合成了一种磁性壳聚糖生物载体,并用 NNN 钳形配体对其进行了功能化,以促进钯的固定。FT-IR、FE-SEM、EDX、XRD、VSM、ICP、BET 和 TGA 分析用于表征合成的纳米复合材料(Fe 3 O 4@三唑-CS@NNN-Pd)。然后,以硼氢化钠为还原剂,研究了其在室温下还原多种硝基芳族化合物的催化活性,以及降解亚甲基蓝 (MB)、甲基橙 (MO) 等三种有害染料的活性。和罗丹明 B (RhB)。该技术是可行的,因为它易于纯化,环境友好,并且在相对较短的响应时间内产生高产率的产物。纳米催化剂很容易分离、回收和重复使用多个循环,而不会显着降低催化活性。