A simple mechanical mixing method for preparation of visible-light-sensitive NiO-CaO composite photocatalysts with high photocatalytic activity.
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.
Song
Limin
L
College of Environment and Chemical Engineering & Tianjin Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin 300160, PR China.
Zhang
Shujuan
S
D017610:Calcium Compounds / Q000737:chemistry*; D002384:Catalysis; D008027:Light; D009532:Nickel / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010777:Photochemistry; D013056:Spectrophotometry, Ultraviolet; D014961:X-Ray Diffraction
D017610:Calcium Compounds; D010087:Oxides; D009532:Nickel; C028007:nickel monoxide; C016538:lime