化学复合镀法制备多孔光催化材料及其光催化性能  

Preparation of Porous Photocatalytic Materials by Electroless Composite Plating Method and Their Photodegradation Performance

作　　者：孙彤[1] 翟玉春[1] 马培华[1] 

机构地区：[1]东北大学材料与冶金学院

出　　处：《过程工程学报》2006年第4期639-644,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:5007014)

摘　　要：以多孔泡沫镍为载体,采用化学复合镀法制备了性能优良的多孔光催化材料,以产品对水中罗丹明B的降解性能为评价指标,对产品的光催化性能进行评价.产品对水中罗丹明B的光催化降解反应严格符合零级动力学规律.化学复合镀制备多孔光催化材料的最佳工艺条件为:镀液中硫酸镍浓度20g/L,次亚磷酸钠浓度20g/L,施镀过程中纳米TiO2投加量0.28g/L,镀液温度90℃,镀液pH值4.6.各因素影响产品性能的顺序为硫酸镍浓度>次亚磷酸钠浓度>镀液温度>镀液pH值>纳米TiO2投加量.纳米Bi2O3复合使产品的光催化性能下降,随着纳米Bi2O3复合量增加,产品的光催化性能提高.ZnO复合使产品的光催化性能有明显改善,随着纳米ZnO复合量的增加,产品的光催化性能提高.Ag修饰导致Bi2O3复合光催化材料的光催化性能下降、ZnO复合光催化材料的光催化性能提高.Porous titanium dioxide-based photocatalytic materials with porous nickel as carrier were prepared by electroless composite plating method. The photocatalytic performance of products was estimated by degrading Rhodamine B solution. The reaction of photocatalytic degradation of Rhodamine B follows the zero order kinetic law. The optimum conditions for preparing porous photocatalytic materials by electroless composite plating method are 20 g/L nickel sulphate, 20 g/L sodium hypophosphite and 0.28 g/L P-25 nanometer titanium dioxide in the electrolass composite plating solution, 90 ℃ and pH=4.6. The order of factors affecting products performance is concentration of nickel sulphate 〉 concentration of sodium hypophosphite 〉 the temperature of electroless composite plating solution 〉 pH 〉 the dosage of P-25 nanometer titanium dioxide. Doping of bismuth oxide can decrease the photocatalytic performance of products. But the photocatalytic performance of products increases as compound dosage of bismuth oxide increases. Doping of zinc oxide can improve the photocatalytic performance of products and the more the zinc oxide, the better the photocatalytic performance of products. Depositing silver on the bismuth oxide composite materials makes the photocatalytic performance of materials decrease. But depositing silver on the zinc oxide composite materials increases the photocatalytic performance of materials.

关 键 词：化学复合镀 泡沫镍 光催化材料 罗丹明B BI2O3 ZnO Ag修饰 

分 类 号：O643[理学—物理化学] X703[理学—化学]