Meso-Structuring of SiCN Ceramics by Polystyrene Templates

Nanomaterials

Julia-Katharina Ewert¹  Christine Denner¹  Martin Friedrich¹  Günter Motz²  Rhett Kempe¹ 

[1] Anorganische Chemie II (Catalyst Design), Universität Bayreuth, 95440 Bayreuth, Germany; E-Mails:;Institute of Ceramic Materials Engineering, Universität Bayreuth, 95440 Bayreuth, Germany

关键词: SiCN;    meso-structured;    self-sacrifical template method;    polystyrene particles;   

DOI  :  10.3390/nano5020425

来源: mdpi

【 摘 要 】

A simple one-pot synthesis of well-defined PS-silazane nano-composites (polystyrene, PS) is described. In contrast to the, thus far, used two-step procedure ((1) assembly of a PS template bed and (2) careful filling of the voids between the PS spheres), which is restricted to macro structuring, we are able to simply mix the PS template and a commercially available silazane precursor HTT-1800 in toluene. The key is the alteration of the zeta potential of the PS template leading to a homogeneous dispersion in the silazane-toluene mixture. Removal of solvent gives rise to a highly ordered PS-silazane nano-composites and subsequent pyrolysis leads to mesoporous silicon carbonitride (SiCN) materials. The one-pot procedure has two advantages: easy upscaling and the use of PS spheres smaller than 100 nm in diameter, here 60 nm. The PS template was characterized by photon correlation spectroscopy, zeta potential measurements, scanning electron microscopy (SEM), and thermal gravimetric analysis (TGA). The resulting mesoporous SiCN materials were analyzed by SEM, transmission electron microscopy (TEM), nitrogen sorption analysis, and Fourier transform infrared measurements (FT-IR).

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.