Mesoporous CeO₂ Hollow Spheres Prepared by Ostwald Ripening and Their Environmental Applications

Abstract

CeO 2 hollow spheres (250-350 nm in diameter), with mesoporous shells of approximately 50 nm, were synthesized by a one-pot, template-free hydrothermal method. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and nitrogen adsorption-desorption measurements were used to characterize the products. The for-

Template‐free Formation of Uniform Urchin‐like α‐FeOOH Hollow Spheres with Superior Capability for Water Treatment

“…It appears that the adsorption capacity of Congo red by the as-synthesized α-FeOOH hollow spheres is significantly higher than that of most similar materials reported previously. [18,[33][34][35]55,56,61,63] prolonged hydrothermal treatment, the adsorbed precursors will further crystallize into rod-or sheet-like nanostructures, forming a complete hierarchical shell.…”

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

“…under oxidizing and reducing conditions, respectively [2,3]. However, the CeO 2 is not a promising candidate for catalytic samples mainly due to its low catalytic activities [4][5][6][7][8][9]. Numerous reports have shown that the activity of ceria in total oxidation reactions is greatly enhanced by transitional metals like Co, Cu, Ti, Ni, and so on [10][11][12].…”

Catalytic photodegradation of Congo red in aqueous solution by Ln(OH)3 (Ln = Nd, Sm, Eu, Gd, Tb, and Dy) nanorods

“…CR dyes from textile and dyeing industries are causing severe environmental problems and are banned in many countries because of health concerns. However, the traditional physical, chemical and biological means of wastewater treatment often have little degradation effect on this anionic secondary diazo dye pollutant due to their complex aromatic structures, which provide them physicochemical, thermal and optical stability [25,26]. Therefore, there is an urgent requirement for development of innovative, but low-cost processes, by which dye molecules can be removed.…”