In this paper, we report the preparation of nickel phosphate in aqueous solution and its use as inorganic pigment. Because cerium phosphate is insoluble in acidic and basic solution, the addition of cerium was tried t...In this paper, we report the preparation of nickel phosphate in aqueous solution and its use as inorganic pigment. Because cerium phosphate is insoluble in acidic and basic solution, the addition of cerium was tried to improve the acid and base resistance of nickel phosphate pigment. The cerium substituted nickel phosphates were prepared from phosphoric acid, nickel nitrate, and ammonium cerium nitrate solution. The additional effects of tetravalent cerium cation were studied on the chemical composition, particle shape and size distribution, specific surface area, color, acid and base resistance of the precipitates and their thermal products.展开更多
The effects of cerium substitution,use of additives,and heating temperature on the chemical composition and catalytic activity of iron phosphate were evaluated.Iron-cerium phosphate was prepared from iron nitrate,ammo...The effects of cerium substitution,use of additives,and heating temperature on the chemical composition and catalytic activity of iron phosphate were evaluated.Iron-cerium phosphate was prepared from iron nitrate,ammonium cerium nitrate,and sodium phosphate in ethylene glycol using sodium dodecyl-sulfate or acetylacetone as additive.The chemical composition,particle shape and size distribution of the obtained samples were respectively evaluated based on ICP and XRD,SEM,and laser diffraction/scattering analysis.The catalytic activity was evaluated based on the decomposition of the complex formed from formaldehyde,ammonium acetate,and acetylacetone.XRD peaks corresponding to FePO_(4) were observed for the samples heated at 600℃whereas samples treated at lower temperatures were amorphous.Iron-cerium phosphates heated at 200℃and 400℃exhibited high catalytic activity for the decomposition of the aforementioned complex.展开更多
文摘In this paper, we report the preparation of nickel phosphate in aqueous solution and its use as inorganic pigment. Because cerium phosphate is insoluble in acidic and basic solution, the addition of cerium was tried to improve the acid and base resistance of nickel phosphate pigment. The cerium substituted nickel phosphates were prepared from phosphoric acid, nickel nitrate, and ammonium cerium nitrate solution. The additional effects of tetravalent cerium cation were studied on the chemical composition, particle shape and size distribution, specific surface area, color, acid and base resistance of the precipitates and their thermal products.
文摘The effects of cerium substitution,use of additives,and heating temperature on the chemical composition and catalytic activity of iron phosphate were evaluated.Iron-cerium phosphate was prepared from iron nitrate,ammonium cerium nitrate,and sodium phosphate in ethylene glycol using sodium dodecyl-sulfate or acetylacetone as additive.The chemical composition,particle shape and size distribution of the obtained samples were respectively evaluated based on ICP and XRD,SEM,and laser diffraction/scattering analysis.The catalytic activity was evaluated based on the decomposition of the complex formed from formaldehyde,ammonium acetate,and acetylacetone.XRD peaks corresponding to FePO_(4) were observed for the samples heated at 600℃whereas samples treated at lower temperatures were amorphous.Iron-cerium phosphates heated at 200℃and 400℃exhibited high catalytic activity for the decomposition of the aforementioned complex.
