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

Abstract: 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 electroless 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

Key words: electroless composite plating, porous nickel, photocatalytic material, Rhodamine B, bismuth oxide, zinc oxide, silver doping