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Magnetically separable Zn1-xCuxFe2O4 (0 ≤ x ≤ 0.5) nanocatalysts for the transesterification of waste cooking oil
Advanced Powder Technology ( IF 5.2 ) Pub Date : 2020-04-29 , DOI: 10.1016/j.apt.2020.04.022
A. Ashok , T. Ratnaji , L. John Kennedy , J. Judith Vijaya

Copper doped zinc ferrite Zn1-xCuxFe2O4 (0 ≤ x ≤ 0.5) spinels were synthesized via sonication assisted microwave method. The prepared nanoparticles were characterized by XRD, FTIR, HR-SEM, EDX, DRS and VSM analysis. Average crystallite size were in range 5.84 nm to 8.55 nm. FTIR results reveal, bands at 420 cm−1 (Zn2+single bondO2−) and 547 cm−1 (Fe3+single bondO2−) confirming tetrahedral and octahedral positions of the spinel structure formation. All the samples showed ferromagnetic behavior at room temperature. The Zn0.5Cu0.5Fe2O4 sample showed high saturation magnetization (Ms = 74.09 emu/g) and high magnetic moment (3.0 μB). The prepared magnetic nano spinels were subsequently employed to evaluate the catalytic activity for biodiesel production. The transesterification process followed pseudo first order rate kinetic model. An excellent catalytic activity for biodiesel production was acheived (98.9%) and the catalyst was recoverable quickly using an external magnet.



中文翻译:

磁性分离的Zn 1-x Cu x Fe 2 O 4(0≤x≤0.5)纳米催化剂用于废食用油的酯交换

通过超声辅助微波法合成了铜掺杂的锌铁氧体Zn 1-x Cu x Fe 2 O 4(0≤x≤0.5)尖晶石。通过XRD,FTIR,HR-SEM,EDX,DRS和VSM分析对制备的纳米颗粒进行表征。平均微晶尺寸在5.84nm至8.55nm的范围内。FTIR结果显示,在420 cm -1(Zn 2+单键 O 2-)和547 cm -1(Fe 3+单键 O 2-)的能带确认了尖晶石结构形成的四面体和八面体位置。所有样品在室温下均表现出铁磁行为。Zn 0.5 Cu 0.5 Fe 2Ò 4样品显示高饱和磁化强度(中号小号 = 74.09鸸鹋/ g)和高磁矩(3.0μ)。随后将制备的磁性纳米尖晶石用于评估生物柴油生产的催化活性。酯交换过程遵循伪一级速率动力学模型。实现了对生物柴油生产的优异催化活性(98.9%),并且使用外部磁体可快速回收催化剂。

更新日期:2020-04-29
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