In this study, the conflation of the phosphorescence ability of SrAl 2 O 4 nanoparticles activated with Eu 2+ , Dy 3+ with the photocatalytic activity of WO 3 particles was studied to create a new composite with enhanced photocatalytic characteristics. In this regard, initially, the SrAl 2 O 4 nanoparticles activated with Eu 2+ , Dy 3+ were synthesized via the combustion method in a reducing atmosphere (90% argon + 10% hydrogen). Then, the ability of the composite photocatalyst WO 3 and SrAl 2 O 4 : Eu 2+ , Dy 3+ for photocatalytic removal of methylene blue from aqueous solutions was studied. A powder mixture of the WO 3 and SrAl 2 O 4 : Eu 2+ , Dy 3+ was dispersed in a solution containing predetermined amounts of methylene blue. Then, the mixture was exposed to light (400-390nm) from three LEDs with a total power of 3 Watts. The highest removal efficiency (97.7%) for photocatalytic removing of methylene blue dye was obtained at pH = 9, time (12 h), and the ratio WO 3 : SrAl 2 O 4 (4: 1), respectively. In the next step, to avoid the wasting of the nanocomposite components, WO 3 and SrAl 2 O 4 : Eu 2+ , Dy 3+ mixture powder was vigorously mixed with ethylene terephthalate monomer. Then the obtained mixture was polymerized on the surface of the glass at room temperature and by using the Co 2+ catalyst. The resulting nanocomposite has a stable structure and it was attached firmly on the glass surface. Then, the photocatalytic ability of the stabilized nanocomposite for photocatalytic removal of methylene blue from aqueous solution was re-evaluated and compared to those of the non-stabilized nanocomposite. The results showed that the stabilized nanocomposite is able to remove methylene blue (maximum removal efficiency of 97%) in 5 h, which indicated that the stabilization of the particles not only prevented the loss of the nanocomposite components, but also significantly enhanced the photocatalytic activity of the nanocomposite.