Preparation of layered carbon nitride/titanium-based metal skeleton materials and study on their electrorheological properties.
basic_science · Level V
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- Record sourced from PubMed, PMID 39629584.
- Also identified by DOI 10.1039/d4sm01247j.
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Abstract
<i>Background</i>: as an intelligent material, electrorheological fluids (ERFs) comprise a suspension system consisting of dielectric particles and/or their composites dispersed in an insulating liquid. In this article, MOF/g-C<sub>3</sub>N<sub>4</sub> composite nanoparticles were successfully synthesized and demonstrated an excellent ER effect. <i>Methods</i>: first, the precursor for g-C<sub>3</sub>N<sub>4</sub> was synthesized using a high-temperature calcination method, followed by the <i>in situ</i> synthesis of MIL-125 (MOF-Ti) on the surface of layered graphitic carbon nitride using a solvothermal approach. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses were used to reveal the presence of numerous MOF particles deposited onto the surfaces of layered g-C<sub>3</sub>N<sub>4</sub> nanosheets. X-ray powder diffraction confirmed the growth of MOF particles on the g-C<sub>3</sub>N<sub>4</sub> precursor. The chemical composition and states were characterized through Fourier-transform infrared (FT-IR) spectroscopy and X-ray photoelectron (XPS) analyses. Additionally, BET analysis indicated the presence of abundant pore structures in the MOF/g-C<sub>3</sub>N<sub>4</sub> composite nanoparticles. <i>Results</i>: lastly, rheological and dielectric properties were investigated. The ER behavior demonstrated their excellent performance, with a 10 wt% mass fraction suspension of the MOF/g-C<sub>3</sub>N<sub>4</sub>-0.4 based composite material and dimethyl silicone oil exhibiting a yield stress of 300 Pa at 2 kV mm<sup>-1</sup>.