Abstract
TiO2 nanomaterials have many promising applications in environmental and energy areas due to their advantages of physical and chemical stability, high activity, non-toxicity and low price. In the present paper, the hierarchical TiO2 nanomaterials with thickness >10 μm were synthesised using Ti–Cu amorphous alloy as the starting material. The field emission scanning electron microscopy, X-ray diffraction and transmission electron microscopy were used to characterise the morphology and structure of the TiO2 nanomaterials. The hierarchical TiO2 nanomaterials exhibited high specific areas of >100 m2 g−1. The phase composition of TiO2 was controlled by adjusting the concentration of SO42− in the immersing solution. The influence mechanism of SO42− on phase composition of TiO2 nanomaterials was discussed. The mixed phase of anatase and rutile had higher photocatalytic efficiency than single phase in degradation of rhodamine B under visible light. The hierarchical TiO2 nanomaterials had potential applications in photocatalyst and solar cell.
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