What question did this study set out to answer?

The aim was to investigate the photocatalytic properties of CuO nanoparticles in degrading synthetic dyes in water.

May 8, 2026ChemistrySelect3 citations

Chemical Precipitation Synthesis of CuO Nanoparticles: Visible Light Photocatalytic Degradation of Methylene Blue, Safranine, & Rhodamine 6G

Key Points

The aim was to investigate the photocatalytic properties of CuO nanoparticles in degrading synthetic dyes in water.
Synthesis of CuO nanoparticles via chemical precipitation from CuCl2.
Exposure of dye solutions (methylene blue, safranine, rhodamine 6G) to visible light for 60 minutes.
Measurement of degradation rates and apparent rate constants for dye solutions.
Methylene blue showed a degradation rate of 16.02% (rate constant 2.47 × 10−2 min−1).
Safranine exhibited a degradation rate of 26.69% (rate constant 3.97 × 10−2 min−1).
Rhodamine 6G had a degradation rate of 10.67% (rate constant 1.66 × 10−2 min−1).

Abstract

ABSTRACT Through chemical precipitation and comprehensive examination of CuO nanoparticles from CuCl 2 , researchers found a link between shape and photocatalytic effectiveness. The visible light photocatalyst, manufactured CuO (50 mg), degraded 10 ppm methylene blue, safranine, and rhodamine 6G dye solutions in water. Safranine, methylene blue, and Rhodamine 6G exhibited degradation rates of 26.69%, 16.02%, and 10.67% after 60 min of light exposure, with apparent rate constants of 3.97 × 10 −2 , 2.47 × 10 −2 , and 1.66 × 10 −2 min −1 , Based on these results, precipitated CuO may be an affordable photocatalyst for dye‐containing wastewater.

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