Facile assembly for fast construction of intercalation hybrids of layered double hydroxides with anionic metalloporphyrin.
Anionic manganese tetrasulfonatophenyl porphyrin (MnTSPP) has been intercalated into the interlamellar space of Mg-Al and Ni-Al layered double hydroxides (LDHs) through the exfoliation/restacking approach by using exfoliated LDH nanosheets and guest molecules as building blocks. The obtained hybrids were characterized by a variety of analytical techniques such as CHN analysis, XRD, FTIR, SEM, HRTEM, UV-vis spectroscopy and thermal analysis. Interlayer spacings determined from XRD patterns reveal a perpendicular orientation of the MnTSPP anions between the hyroxylated layers of both LDHs. The results of zeta potential measurements give information about the surface charge change of LDH nanoparticles associated with the spontaneous coassembly process. The catalytic performance of the heterogeneous catalysts MnTSPP/Mg-Al LDH2.0 and MnTSPP/Ni-Al LDH1.0 for the epoxidation of cyclohexene was investigated using molecular oxygen as an oxidant and isobutylaldehyde as a co-reductant. The intercalated hybrids appear to be promising catalysts owing to their good catalytic activity and selectivity.
Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, P.R. China. zhiweitong575@hotmail.com.
Juanjuan
J
Ma
Lin
L
Liu
Shanzhong
S
Li
Yonghao
Y
Chen
Meng
M
Zhuo
Feng
F
Shao
Junyan
J
Gong
Zhiwei
Z
Tong
D002384:Catalysis; D006878:Hydroxides / Q000737:chemistry*; D008665:Metalloporphyrins / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D013818:Thermogravimetry; D014961:X-Ray Diffraction
D006878:Hydroxides; D008665:Metalloporphyrins; D008670:Metals