Effect of the Acidity on the Morphology and Composition of Nano-TiO2/ Cu Particles
Nano-TiO2/micro-Cu composite particles were prepared by peptization method using Ti(OBu)4 and SnCl2•2H2O as the raw materials. The effect of the content of HNO3 on the morphology and composition was investigated. The results showed that when the mole ratio of HNO3 and Ti(OBu)4 was 0.5:1, about 100nm TiO2 of amorphous phase grew on the surface of Cu forming strawberry like particles. When the mole ratio of HNO3 and Ti(OBu)4 was 1:1, Cu powders were coated with TiO2 crystals of several nanometers in size, meanwhile particles of several microns in size was absorbed on the Cu surface, which can be easily removed by water cleaning. The possible mechanism was discussed in the end.
Yiwang Bao, Li Tian and Jianghong Gong
S. G. Du et al., "Effect of the Acidity on the Morphology and Composition of Nano-TiO2/ Cu Particles", Advanced Materials Research, Vol. 177, pp. 45-48, 2011