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<p>This study was conducted with the aim of determining the performance of silver nanoparticles (AgNP) synthesized using soursop leaf extract for photocatalytic degradation of congo red (CR) and indigo carmine (IC) dyes. The AgNPs were synthesized using a water extract of soursop leaves and applied as a photocatalyst in the degradation of CR and IC dyes under UV irradiation. The results showed that AgNPs had maximum absorbance at around 467.5–468.5&#xa0;nm and remained stable after 96&#xa0;h. For photodegradation, 1 mL of AgNPs was optimum for CR degradation, while 5 mL was needed for IC with the optimum pH of 2 for degrading both dyes within 60&#xa0;min. Under the optimum conditions, the degradation percentages of IC and CR using AgNPs remain above 99% on all concentrations investigated (100–700&#xa0;mg/L). The study concluded that AgNPs made using soursop leaf extract can be used as effective and durable photocatalysts for treating anionic dye pollutants such as CR and IC.</p> Graphical abstract <p></p>

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Eco-Friendly synthesis of silver nanoparticles using soursop leaf extract for photocatalytic degradation of congo red and Indigo Carmine dyes

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Iryanti Eka Suprihatin,
  • Ida Ayu Gede Widihati,
  • Ni Gusti Ayu Dwi Adhi Suastuti,
  • Gusti Ayu Dewi Lestari,
  • Ni Putu Diantariani,
  • Khoiriah Khoiriah,
  • A. A.S.A. Sukmaningsih

摘要

This study was conducted with the aim of determining the performance of silver nanoparticles (AgNP) synthesized using soursop leaf extract for photocatalytic degradation of congo red (CR) and indigo carmine (IC) dyes. The AgNPs were synthesized using a water extract of soursop leaves and applied as a photocatalyst in the degradation of CR and IC dyes under UV irradiation. The results showed that AgNPs had maximum absorbance at around 467.5–468.5 nm and remained stable after 96 h. For photodegradation, 1 mL of AgNPs was optimum for CR degradation, while 5 mL was needed for IC with the optimum pH of 2 for degrading both dyes within 60 min. Under the optimum conditions, the degradation percentages of IC and CR using AgNPs remain above 99% on all concentrations investigated (100–700 mg/L). The study concluded that AgNPs made using soursop leaf extract can be used as effective and durable photocatalysts for treating anionic dye pollutants such as CR and IC.

Graphical abstract