摘要
利用水热法和共沉淀法制备了微纳米氧化铁光催化剂,表征了氧化铁的微观形貌和晶体结构,并以罗丹明B溶液作为目标污染物,研究了氧化铁催化剂的可见光催化性能.结果表明:共沉淀法制备的氧化铁为有所团聚的微米块状,水热法所制备的氧化铁微观形貌为直径约400 nm的纳米球形.催化剂的制备方法、催化剂的投加量及H2O2的加入对污染物溶液的光催化降解效果均有影响.以0.03 g水热法制备的氧化铁为催化剂,加入0.1 mL H2O2,光催化降解50 mL 20 mg/L罗丹明B溶液,30 min后降解率能够达到100%.
Micro and nano α-Fe2O3 photoeatalysts were prepared by hydrothermal and coprecipitation methods, and their micromorphology and crystal structure were characterized. The visible light induced photocatalytie activity of the samples was studied using Rhodamine B （ Rh B） solution as the target pollutant. The results indicate that the α-Fe2O3 nanopartieles synthesized via coprecipitation way show reunion lumps on micron-scale, while the photocatalysts prepared by hydrothermal way are nanospheres with diameters about 400 nm. The photoeatalytie degradation of the pollutant solution is influenced by the preparation methods, the dosage of the catalysts and the addition of H2O2. The degradation rate of Rh B （50 mL 20 mg/L） can reach 100% with the synergistic action of α-Fe2O3 （ 0.03 g, hydrothermal）, H2O2 （0.1 mL） and visible light irradiation （ 30 min）.
出处
《大连交通大学学报》
CAS
2013年第1期60-63,共4页
Journal of Dalian Jiaotong University
关键词
氧化铁
水热法
共沉淀法
可见光催化降解
罗丹明B
α-Fe2O3
hydrothermal
coprecipitation
visible light induced photocatalytic degradation
Rh B
