Temperature dependent fabrication of various rod and rhombohedral-shaped mesoporous Co₃O₄ crystals and their capability towards elimination of toxic Cr(vi) ions from the aquatic environment

Abstract

Currently, wastewater treatment is a vital environmental concern as it is a huge challenge for people to live healthy life. Consequently, legislation aimed at ensuring the removal of toxic effluents...

Robust 2 nm-sized gold nanoclusters on Co3O4 for CO oxidation

“…00-042-1467), respectively, with a space group of Fd3m . 20 The high peak intensities confirmed the high crystallization of the Co 3 O 4 support. Another XRD peak at ∼38.5° corresponds to the Au(111) phase, clearly suggesting the existence of gold NCs in the Au/Co 3 O 4 sample.…”

“…The diffraction peaks of Co 3 O 4 were observed at 19.0°, 31.3°, 36.8°, 44.8°, 55.7°, 59.4°, and 65.2°, which can be assigned to the (111), (220), (311), (222), (400), (422), (511), and (440) planes of the Co 3 O 4 phase (JPDS No. 00-042-1467), respectively, with a space group of Fd3m 20. The high peak intensities conrmed the high crystallization of the Co 3 O 4 support.…”

Environmentally benign fabrication of superparamagnetic and photoluminescent Ce,Tb-codoped Fe3O4-gluconate nanocrystals from low-quality iron ore intended for wastewater treatment

“…We know that bulk Fe 3 O 4 normally can show either n- or p-type behavior, 9 unlike the case of other simple n-type 101 or p-type 102 semiconductor systems. Herein, from the Mott–Schottky analysis, we have proved that both the doped and undoped materials show only a p-type semiconducting nature, which can be related to the effective charge carrier separation for conducting the photocatalysis process.…”

“…With a much larger specific surface area, nanoparticles possess stronger adsorption ability and increased available active surface sites. 102 As G24 has a higher surface area compared to 1Ce–1Tb@G24, the chances of dye adsorption are higher in G24 rather than its fragmentation via photocatalysis. The effect of surface area on the photocatalytic efficiency has already been discussed in detail in Section 4.9.…”