Abstract
In the present study, we have demonstrated an easy approach for the ultrathin TiO2 coating on boron particles by simple chemical vapor deposition (CVD) method. Boron particles dispersed in ethanol and titanium tetra isopropoxide (TTIP) were delivered in the tube furnace held at 450 °C through the atomizer and bubbler, respectively where the formation of TiO2 coated boron particles arises. The obtained TiO2 coated boron particles were characterized with different characterization techniques, such as, transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and thermogravimetric analysis (TGA). TEM analysis shows that the boron particles are utterly covered by a thin layer TiO2 particles and the thickness of TiO2 layer on the surface of boron particles varies with respect to the bubbler flow rate. Moreover, TiO2 coated boron particles represents the core-shell like structure. Amorphous nature of boron is observed from the XRD. Further, XPS and EDX analysis shows the presence of B, Ti and O elements in the obtained samples. TGA analysis demonstrate the enhanced oxidation-resistance performance of TiO2 coated boron particles as compared to pristine boron particles, which is due to the effective protection of the boron by thin TiO2 coating against oxidation in oxygen environment.
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