A simple mechanical mixing method for preparation of visible-light-sensitive NiO-CaO composite photocatalysts with high photocatalytic activity

作者：Song, Limin; Zhang, Shujuan^*

来源：Journal of Hazardous Materials, 2010, 174(1-3): 563-566.

DOI：10.1016/j.jhazmat.2009.09.088

• NiO-CaO
• A mechanical mixing method
• Visible-light-sensitive
• Photocatalyst

Composite photocatalysts composed of NiO and CaO have been prepared via mechanically mixing of the two powders. The as-synthesized NiO-CaO products were characterized by X-ray diffraction (XRD) and UV-vis spectrometry. The experimental results showed that the absorption wavelength range of the mixed NiO-CaO sample was notably extended towards the visible-light region (400-450 nm). Photocatalytic activity of the NiO-CaO composite was evaluated based on the decomposition of methylene blue under visible-light irradiation. The effects of CaO doping and the duration of heat treatment on the durability of the NiO-CaO products have been investigated in detail. Factors influencing photocatalytic activity and the mechanism of photocatalysis were also addressed. Published by Elsevier B.V.

• 出版日期2010-2-15
• 单位天津工业大学; 天津科技大学