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A series of silica-based nanocomposites have been synthesised by an impregnation and co-impregnation method, namely, 20 wt% Ti-SiO 2 , 20 wt% Ce-SiO 2 , 20Ti-Ce-SiO 2  (10:10 wt/wt Ti:Ce), and 40Ti-Ce-SiO 2  (20:20 wt/wt Ti:Ce). The prepared photocatalysts have been characterised by XRD, S BET , FT-IR, FE-SEM, XPS and optical techniques. The activity of the prepared photo-catalysts was evaluated using Fuchsine acid dye under UV and visible exposure. The degradation percentage and apparent first-order kinetics were calculated. The photo-degradation of the nano-composites was reached 62%, 84.8%, 79% and 73% for Ti-SiO 2 , Ce-SiO 2 , 20Ce-Ti-SiO 2  and 40Ce-Ti-SiO 2  after 180 min under visible irradiation. The scavenger’s assessment analysis was carried out to know the vital role of responsive species which responsible for photoactivity. The Ce-SiO 2  exhibited an excellent photocatalytic activity of Fuchsine acid (FA) dye degradation under visible light. The photo-degradation rate ( k ) of the synthesised samples was 1.1 × 10 −2  min −1  with R 2  of 0.98 for Ce-SiO 2  photo-catalyst. The results confirmed that the h +  and O 2•−  principally participate in the photodegradation of dye over Ce-SiO 2  nano-composite; however,  • OH contributes in negligible extent.

Preparation and characterisation of Ce-doped SiO 2 nano-materials as effective photo-catalyst under visible light