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<p>To address dye-contaminated wastewater, a ternary nanocatalyst, anatase/Ag–ZnO (A/AZNC), was synthesized via a low-temperature sol–gel route at 80&#xa0;°C. The synthesized A/AZNC composite exhibits a specific surface area of ~ 20&#xa0;m<sup>2</sup>g<sup>−1</sup>, an average pore diameter of ~ 1.9&#xa0;nm, and a crystallite size of ~ 20&#xa0;nm, along with thermal stability up to ~ 400&#xa0;°C, and an optical bandgap of ~ 3.27&#xa0;eV. Under UV irradiation, A/AZNC achieved ~ 92% methylene blue (MB) degradation within 240&#xa0;min, following pseudo-first-order kinetics with a rate constant (k<sub>app</sub>) of ~ 0.01&#xa0;min<sup>−1</sup>. The enhanced photocatalytic performance is attributed to improved charge separation at the anatase/Ag–ZnO interface. These findings demonstrate that A/AZNC is an efficient photocatalyst with potential applicability in wastewater treatment.</p>

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Structurally robust anatase/Ag–ZnO heterojunctions prepared at low temperature for photocatalytic activity

  • 期刊论文

  • 发表日期：

    2026年5月29日

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  • Shumaila Islam,
  • Adil Alshoaibi,
  • Kawther Alamer

摘要

To address dye-contaminated wastewater, a ternary nanocatalyst, anatase/Ag–ZnO (A/AZNC), was synthesized via a low-temperature sol–gel route at 80 °C. The synthesized A/AZNC composite exhibits a specific surface area of ~ 20 m2g−1, an average pore diameter of ~ 1.9 nm, and a crystallite size of ~ 20 nm, along with thermal stability up to ~ 400 °C, and an optical bandgap of ~ 3.27 eV. Under UV irradiation, A/AZNC achieved ~ 92% methylene blue (MB) degradation within 240 min, following pseudo-first-order kinetics with a rate constant (kapp) of ~ 0.01 min−1. The enhanced photocatalytic performance is attributed to improved charge separation at the anatase/Ag–ZnO interface. These findings demonstrate that A/AZNC is an efficient photocatalyst with potential applicability in wastewater treatment.