当前位置: X-MOL 学术Appl. Organomet. Chem. › 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.)
NiFe2O4@SiO2@Cu3(BTC)2 nanocomposite as a magnetic metal–organic framework
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2020-09-08 , DOI: 10.1002/aoc.5994
Maryam Heydari 1 , Mehrnaz Gharagozlou 1 , Mehdi Ghahari 1 , Sanaz Naghibi 2
Affiliation  

A new magnetic metal–organic framework (MOF), namely, NiFe2O4@SiO2@Cu3(BTC)2, was synthesized via an in situ method using Fe(NO3)3, Ni(NO3)2, CuN2O6, TEOS, (3‐aminopropyl)triethoxysilane, and benzene‐1,3,5‐tricarboxylic acid. Three different samples were fabricated according to a formula; xNiFe2O4@(100 − x)SiO2@Cu3(BTC)2, where x = 10, 30, and 50. The integration of the intrinsic characteristic of Cu3(BTC)2 as an MOF with strong magnetic properties of NiFe2O4 could lead to an exquisite material with specific behaviors. X‐ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), diffuse reflectance spectroscopy (DRS), photoluminescence (PL), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM), and simulated thermal analyzer (STA) were utilized to characterize the mentioned samples. Results approved that the synthesized compounds were composed of SiO2 and Cu‐MOF and NiFe2O4 crystalline phases with rod‐like morphology. The similarity between the morphology of the synthesized samples and Cu‐MOF approved that an appropriate fabrication method has been selected. This fact led to observe mesoporous composites with 38–90 m2 g−1 specific surface area. PL spectroscopy confirmed the near bandgap emission, ligand‐to‐metal charge transfer, and metal‐to‐ligand charge transfer. Although all the samples had magnetic hysteresis, the highest magnetization was seen in the 50NiFe2O4@SiO2@Cu3(BTC)2 sample. This composite compound with a magnetization value of 2 emu g−1 at 8000 Oe and a specific surface area of 90 m2 g−1 could be classified as a magnetic MOF (MMOF). STA results suggested that 400°C is the highest operating temperature for this compound.

中文翻译:

NiFe2O4 @ SiO2 @ Cu3(BTC)2纳米复合材料,作为磁性金属-有机骨架

一种新的磁性金属-有机骨架(MOF),即,由NiFe 2 ö 4 @SiO 2 @Cu 3(BTC)2,经合成的原位方法,使用的Fe(NO 33,镍(NO 32, CuN 2 O 6,TEOS,(3-氨基丙基)三乙氧基硅烷和苯-1,3,5-三羧酸。根据一个公式制造了三个不同的样品。x NiFe 2 O 4 @(100- x)SiO 2 @Cu 3(BTC)2,其中x分别为10、30和50。Cu 3(BTC)2的本征特性作为具有MoFe和NiFe 2 O 4的强磁性的MOF的集成可能导致具有特定行为的精美材料。X射线衍射(XRD),傅立叶变换红外(FTIR),扫描电子显微镜(SEM),布鲁诺尔·埃米特·泰勒(BET),漫反射光谱(DRS),光致发光(PL),振动样品磁力计(VSM),透射电子显微镜(TEM)和模拟热分析仪(STA)用于表征上述样品。结果证明合成的化合物由SiO 2和Cu-MOF以及NiFe 2 O 4组成具有棒状形态的结晶相。合成样品的形态与Cu-MOF的相似性证明已选择了合适的制造方法。这一事实导致观察到比表面积为38–90 m 2 g -1的介孔复合材料。PL光谱证实了近带隙发射,配体到金属的电荷转移以及金属到配体的电荷转移。尽管所有样品都具有磁滞现象,但在50NiFe 2 O 4 @SiO 2 @Cu 3(BTC)2样品中观察到了最高的磁化强度。该复合化合物在8000 Oe下的磁化值为2 emug -1,比表面积为90 m2 g -1可分类为磁性MOF(MMOF)。STA结果表明,该化合物的最高工作温度为400°C。
更新日期:2020-11-06
down
wechat
bug