当前位置: X-MOL 学术New Carbon Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Preparation of an activated carbon from hazelnut shells and its hybrids with magnetic NiFe2O4 nanoparticles
New Carbon Materials ( IF 6.5 ) Pub Date : 2019-01-17 , DOI: 10.1016/s1872-5805(18)60358-0
Milad Jamal Livani , Mohsen Ghorbani , Hassan Mehdipour

A low cost activated carbon was prepared from hazelnut shells by chemical activation with sodium hydroxide at 600 °C in a N2 atmosphere and then combined with magnetic NiFe2O4 nanoparticles by hydrothermal and co-precipitation methods. Samples were characterized by FESEM, TEM, XRD, FT-IR, nitrogen adsorption and magnetic measurements. Results indicated that the NiFe2O4 nanoparticles synthesized by the hydrothermal method had a higher saturation magnetization and smaller average particle size than those produced by the co-precipitation method. The specific surface area and total pore volume of the activated carbon decreased from 314 to 288 m2/g and 0.3639 to 0.3338 cm3/g, respectively by forming a hybrid with the magnetic NiFe2O4 nanoparticles synthesized by the hydrothermal method. NiFe2O4 nanoparticles were mainly distributed on the surface, although a few were inside the pores of the activated carbon. Their sizes were the same as those of the original ones. The saturation magnetization of the hybrids was lower than those of the original NiFe2O4 nanoparticles due to the existence of the activated carbon. They showed superparamagnetic behavior at room temperature and were easily separated from solutions by an external magnet.



中文翻译:

从榛子壳中制备活性炭及其与磁性NiFe 2 O 4纳米粒子的杂化物

通过在N 2气氛中在600°C下用氢氧化钠进行化学活化,从榛子壳中制备低成本的活性炭,然后通过水热和共沉淀法将其与磁性NiFe 2 O 4纳米粒子混合。通过FESEM,TEM,XRD,FT-IR,氮吸附和磁测量对样品进行表征。结果表明,与共沉淀法相比,水热法合成的NiFe 2 O 4纳米粒子具有更高的饱和磁化强度和更小的平均粒径。活性炭的比表面积和总孔体积从314降至288 m 2 / g,从0.3639降至0.3338 cm 3分别通过与通过水热法合成的磁性NiFe 2 O 4纳米粒子形成杂化物来实现。NiFe 2 O 4纳米颗粒主要分布在表面上,尽管少数在活性炭的孔内。它们的大小与原始大小相同。由于存在活性炭,杂化物的饱和磁化强度低于原始的NiFe 2 O 4纳米粒子。它们在室温下表现出超顺磁性能,并易于通过外部磁体与溶液分离。

更新日期:2019-01-17
down
wechat
bug