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A series of measurement results revealed that the nano-SnO 2  (n-SnO 2 ) nanoparticles were spread uniformly on the carbon surface inside the wild plum ( Prunus domestica)  kernel shell biochar (WPKSB) structure. The addition of hydrothermally synthesized n-SnO 2  to WPKS improved both the adsorption capacity and the photocatalytic potential of WPKSB for methylene blue (MB) removal. When the initial MB content was 5 mg/L, the n-SnO 2 @WPKSB composite demonstrated high MB removal efficiency under UV light via a combined effect of adsorption and photocatalysis. The n-SnO 2 @WPKSB composite removed 99.5 (±0.4) % of the MB from the dye-polluted water sample in 105 minutes at pH of 7.0. Because of the synergistic effect of adsorption and photodegradation, the composite was more effective at treating the aqueous MB solution than WPKSB and n-SnO 2  alone. Reusability tests were run to remove MB to assess the composite structure’s chemical stability and catalytic capacity. The n-SnO 2 @WPKSB composite was characterized using X-ray Diffraction, Fourier Transform infrared and Scanning Electron Microscopy. This research investigates how to make metal oxide/biochar nanocomposites with exceptional adsorption and photocatalysis properties for the oxidation and removal of MB.

Removal of methylene blue using a novel generation photocatalyst based on nano-SnO 2 /wild plumb kernel shell biochar composite