Issue 46, 2015

Brij-58 template synthesis of self-assembled thermostable lamellar crystalline zirconia via a reflux-hydrothermal hybrid method

Abstract

Using polyoxyethylene-20-cetyl-ether (Brij-58) as a supramolecular template, thermostable lamellar crystalline zirconia (TSLCZ) was synthesized though the reflux-hydrothermal hybrid method (R-HT) with ZrOCl2·8H2O as the zirconium source and sodium hydroxide as the precipitating agent. The TSLCZs were characterized by XRD, TEM, SAED, FE-SEM, TG-DTA and FTIR. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses showed that zirconia is the only crystal phase in TSLCZ and Brij-58 promoted zirconia nucleation and 2D-growth and induced self-ordered lamellar nanostructured assembly. Transmission electron microscopic (TEM) observations further proved this regular lamellar structure, which was detected by XRD. The repeat periodicity of the structure is about 1.20 nm, as observed by TEM, which is in well accordance with the XRD data (1.19 nm). The selected area electron diffraction (SAED) results indicate that TSLCZ is a polycrystalline structure. XRD, TEM and field emission scanning electron microscopy (FE-SEM) results show that the TSLCZ can be well preserved even after a high temperature thermal treatment at 500 °C for 2 h. Moreover, the R-HT significantly promoted the Brij-58 directed synthesis of TSLCZ in the three aspects of heterogeneous nucleation, controlled 2-D growth and ordered lamellar self-assembly as compared to only the reflux (R) or hydrothermal (HT) method. The possible formation of the TSLCZ could be explained by the use of the surfactant template.

Graphical abstract: Brij-58 template synthesis of self-assembled thermostable lamellar crystalline zirconia via a reflux-hydrothermal hybrid method

Associated articles

Article information

Article type
Paper
Submitted
25 Mar 2015
Accepted
07 Apr 2015
First published
08 Apr 2015

RSC Adv., 2015,5, 36467-36471

Author version available

Brij-58 template synthesis of self-assembled thermostable lamellar crystalline zirconia via a reflux-hydrothermal hybrid method

P. Su, X. Ji, C. Liu, W. Gao, R. Fu, C. Tang and B. Cheng, RSC Adv., 2015, 5, 36467 DOI: 10.1039/C5RA05296C

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