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Photocatalytic Decomposition of Microplastics with a Suspension of Titanium Dioxide Doped with Fullerenol-70

Russian Journal of Physical Chemistry A 2026
O. V. Rakhimova, N. V. Smirnova, E. A. Astashkov, N. A. Kulenova, M. A. Sadenova, B. Azamatov, N. A. Charykov, D. G. Letenko

Summary

Researchers tested a titanium dioxide–fullerenol-70 photocatalytic suspension as a method for breaking down microplastics, finding it degraded up to 44% of nylon in a single day and outperformed plain titanium dioxide by up to 3× depending on polymer type. This offers a promising chemical approach to reducing microplastic concentrations in water without generating secondary pollutants.

The photocatalytic activity of a suspension of titanium dioxide with fullerenol-70 in the decomposition of a microplastic has been studied. The efficiency of decomposition of various types of microplastics was determined based on the obtained results: the degradation after 1 day of experiment was 25 ± 12% for low-pressure polyethylene; 27 ± 3% for polyethylene terephthalate; 42 ± 8% for polystyrene; and 44 ± 21% for nylon. The resulting suspension of titania with fullerenol-70 is 1.9 times more efficient than a suspension of individual titania in the decomposition of high-density polyethylene and polyethylene terephthalate, three times more efficient in the decomposition of polystyrene, and 3.1 times more efficient in the decomposition of nylon.

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