Transparent conductors as solar energy materials: A panoramic review

Boron carbide is a strategic material, finding applications in nuclear industry, armour for personnel and vehicle safety, rocket propellant, etc. Its high hardness makes it suitable for grinding and cutting tools, ceramic bearing, wire drawing dies, etc. Boron carbide is commercially produced either by carbothermic reduction of boric acid in electric furnaces or by magnesiothermy in presence of carbon. Since many specialty applications of boron carbide require dense bodies, its densification is of great importance. Hot pressing and hot isostatic pressing are the main processes employed for densification. In the recent past, various researchers have made attempts to improve the existing methods and also invent new processes for synthesis and consolidation of boron carbide. All the techniques on synthesis and consolidation of boron carbide are discussed in detail and critically reviewed.

Synthesis and consolidation of boron carbide: a review

Undoped CeO2 and 0.50-5.00 mol% Fe-doped CeO2 nanoparticles were prepared by a homogeneous precipitation combined with homogeneous/impreganation method, and applied as photocatalyst films prepared by a doctor blade technique. The superior photocatalytic performances of the Fe-doped CeO2 films, compared with undoped CeO2 films, was ascribed mainly to a decrease in band gap energy and an increase in specific surface area of the material. The presence of Fe(3+) as found from XPS analysis, may act as electron acceptor and/or hole donor, facilitating longer lived charge carrier separation in Fe-doped CeO2 films as confirmed by photoluminescence spectroscopy. The 1.50 mol% Fe-doped CeO2 film was found to be the optimal iron doping concentration for MO degradation in this study.

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Photocatalytic Degradation of Methyl Orange by CeO2 and Fe–doped CeO2 Films under Visible Light Irradiation

Investigation on mechanism of photocatalytic activity enhancement of nanometer cerium-doped titania

sol was prepared for the degradation of methylene blue (MB) solution under ultraviolet (UV) irradiation. The absorption spectra of MB indicated that the maximum wavelength, 663 nm, almost kept the same. The performance of 92.3% for color removal was reached after 160 min. The particle size of sol was about 22.5 nm. X-ray diffraction showed that consisted of a single anatase phase. The small size and anatase phase probably resulted in high photocatalytic activity of sol. The degradation ratio decreased as the initial concentration of MB increased. The photodegradation efficiency decreased in the order of . Regarding catalyst load, the degradation increased with the mass of catalyst up to an amount of 1.5 then decreased as the mass continued to increase. The addition of to sol resulted in an increase on the degradation ratio.

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Yansheng Yin

Papers

Microstructure and properties of (SiC, TiB2)/B4C composites by reaction hot pressing

Effect of rare earth addition on super-hydrophilic property of TiO2/SiO2 composite film

Preparation of cerium-doped TiO2 film on 304 stainless steel and its bactericidal effect in the presence of sulfate-reducing bacteria (SRB)

Preparation of TiO2 nanofilm via sol–gel process and its photocatalytic activity for degradation of methyl orange

Effect of microstructure on the fracture behavior of micro–nano ZTA composite