The proposed invention relates to methods of obtaining adsorbents and photocatalysts. A method for obtaining a photocatalyst-adsorbent based on stannous oxide (IV), in the synthesis of which a solution of SnCl2-2H2O in ethanol is added to a solution of oxalic acid in ethanol, activated carbon is added, stirred, incubated for one day, dried, calcined. The proposed method is environmentally friendly

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