采用共沉淀法制备了AgBr/Ag_(2)CO_(3)复合催化剂。研究表明,AgBr/Ag_(2)CO_(3)复合催化剂的光催化性能比单一相的AgBr或Ag_(2)CO_(3)显著提高,0.10 g AgBr/Ag_(2)CO_(3)样品光照降解200 mL 10 mg/L的亚甲基蓝溶液20 min后,降解率高达99...采用共沉淀法制备了AgBr/Ag_(2)CO_(3)复合催化剂。研究表明,AgBr/Ag_(2)CO_(3)复合催化剂的光催化性能比单一相的AgBr或Ag_(2)CO_(3)显著提高,0.10 g AgBr/Ag_(2)CO_(3)样品光照降解200 mL 10 mg/L的亚甲基蓝溶液20 min后,降解率高达99.97%,是AgBr的2.5倍,是Ag_(2)CO_(3)的4.77倍,且AgBr/Ag_(2)CO_(3)对亚甲基蓝的降解过程符合一级动力学模型。展开更多
The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (N-vinylpyrrolidone) (PVP) and characterized by XRD, TEM, EDX and magnetometry. XRD results suggest the formation of pure cobal...The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (N-vinylpyrrolidone) (PVP) and characterized by XRD, TEM, EDX and magnetometry. XRD results suggest the formation of pure cobalt ferrite. The mean particle sizes of CoFe2O4 samples annealed at 400 ℃ and 600 ℃ were ca. 6 and 25 nm, respectively as obtained by transmission electron microscopy (TEM). The magnetic measurements indicated that nano-particles obtained at 400 ℃ were superparamagnetic while that prepared at 600 ℃ were ferrimagnetic.展开更多
文摘采用共沉淀法制备了AgBr/Ag_(2)CO_(3)复合催化剂。研究表明,AgBr/Ag_(2)CO_(3)复合催化剂的光催化性能比单一相的AgBr或Ag_(2)CO_(3)显著提高,0.10 g AgBr/Ag_(2)CO_(3)样品光照降解200 mL 10 mg/L的亚甲基蓝溶液20 min后,降解率高达99.97%,是AgBr的2.5倍,是Ag_(2)CO_(3)的4.77倍,且AgBr/Ag_(2)CO_(3)对亚甲基蓝的降解过程符合一级动力学模型。
文摘The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (N-vinylpyrrolidone) (PVP) and characterized by XRD, TEM, EDX and magnetometry. XRD results suggest the formation of pure cobalt ferrite. The mean particle sizes of CoFe2O4 samples annealed at 400 ℃ and 600 ℃ were ca. 6 and 25 nm, respectively as obtained by transmission electron microscopy (TEM). The magnetic measurements indicated that nano-particles obtained at 400 ℃ were superparamagnetic while that prepared at 600 ℃ were ferrimagnetic.
