Mandizadeh Samira, Amiri Omid, Salavati-Niasari Masoud
Institute of Nano Science and Nano Technology, University of Kashan P. O. Box. 87317-51167 Kashan I. R. Iran
Faculty of Chemistry, Razi University Kermanshah 6714414971 Iran.
RSC Adv. 2021 Aug 16;11(44):27701-27713. doi: 10.1039/d1ra04581d. eCollection 2021 Aug 9.
NiFeO nanosheets were successfully synthesized combined ultrasonic and combustion methods using triiodothyronine (T3) hormone as a biotemplate. Isodiesel and heavy diesel were selected as feedstocks to evaluate the ultrasound-assisted catalytic oxidation process. In this study, we focused on high performance of diesel engine with NiFeO nanosheets. Various conditions such as catalyst dosage, hydrogen peroxide dosage, frequency range and catalyst morphologies of NiFeO were investigated to achieve optimized conditions. High levels of sulfur compounds (98%) were removed using NiFeO catalysts under determined conditions (1.0 g L catalyst, O/S mole ratio = 2, frequency = 40 kHz and morphology of the nanocatalyst = nanosheets). The nickel ferrite nano additive was mixed with isodiesel and heavy diesel using an ultrasonicator device to achieve better stability. The results indicated that under the optimum amount (1% w/v), the NiFeO nanostructure is the best additive to reduce NO , CO, HC and smoke emission in diesel engines. Moreover, a change in the flash point and viscosity of diesel fuels was observed with the addition of nanosheets. NiFeO could be recycled 3 times without a significant decrease in catalyst activity.
以三碘甲状腺原氨酸（T3）激素为生物模板，采用超声和燃烧相结合的方法成功合成了NiFeO纳米片。选择异柴油和重柴油作为原料，评估超声辅助催化氧化过程。在本研究中，我们关注的是具有NiFeO纳米片的高性能柴油发动机。研究了催化剂用量、过氧化氢用量、频率范围和NiFeO的催化剂形态等各种条件，以实现优化条件。在确定的条件下（1.0 g/L催化剂，氧/硫摩尔比 = 2，频率 = 40 kHz，纳米催化剂形态 = 纳米片），使用NiFeO催化剂可去除高水平的硫化合物（98%）。使用超声装置将镍铁氧体纳米添加剂与异柴油和重柴油混合，以实现更好的稳定性。结果表明，在最佳用量（1% w/v）下，NiFeO纳米结构是降低柴油发动机中NO、CO、HC和烟雾排放的最佳添加剂。此外，添加纳米片后观察到柴油燃料的闪点和粘度发生了变化。NiFeO可以循环使用3次，而催化剂活性没有显著降低。
