Scholarlink

<p>Visible light-driven photocatalysis offers a sustainable approach for degrading synthetic textile dyes. This work aims to synthesize morphology-tuned ZnO nanostructures and evaluate their photocatalytic efficiency for cost-effective wastewater remediation. In this study, ZnO nanostructures with controlled morphologies were synthesized via a hydrothermal route by varying the synthesis time. ZnO nanostructures were characterized by XRD, UV–Vis, Raman, FTIR, FESEM, and TEM techniques. The analyses confirmed wurtzite crystallinity, revealed tunable crystallite sizes, demonstrated band gap narrowing, and enhanced morphology for photocatalytic efficiency&#xa0;in the synthesized ZnO nanostructures.. Notably, ZnO nanoflowers prepared over 7&#xa0;h exhibited enhanced crystallinity, abundant oxygen vacancies, and a narrowed band gap, leading to improved visible light absorption and photocatalytic efficiency. Under 400-nm illumination, these nanostructures achieved 92% degradation of Rhodamine B within 320&#xa0;min, following pseudo-first-order kinetics (<i>R</i><sup>2</sup> = 0.9566, <i>t</i><sub>1</sub>/<sub>2</sub> = 60&#xa0;min). ROS scavenging studies revealed that superoxide anions were the dominant reactive species. The catalyst also showed excellent stability and reusability, highlighting its promise for practical wastewater remediation.The scope of this work lies in demonstrating the potential of morphology-engineered ZnO nanostructures as cost-effective and reusable photocatalysts for practical wastewater remediation applications. Hydrothermal synthesis time controls ZnO nanoparticle morphology and photocatalytic efficiency. Longer times yield well-defined, crystalline structures with higher activity, while shorter times produce less crystalline, less active particles. ZnO nanoflowers have a high surface area and unique petal-like morphology, enhancing visible light-driven dye degradation and making them efficient, eco-friendly agents for wastewater treatment.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Surface oxygen vacancy-rich distorted ZnO nanoflowers for efficient photocatalytic degradation of rhodamine B dye

  • 期刊论文

  • 发表日期：

    2026年1月9日

查看全文
  • Jahnavi Enaganti,
  • A. Saineetha,
  • P. Jeevan Kumar,
  • Songhita Meher,
  • V. Sai Kumar,
  • C. Prajvala,
  • A. Avinash,
  • Akash Tomar,
  • K. Venkateswara Rao

摘要

Visible light-driven photocatalysis offers a sustainable approach for degrading synthetic textile dyes. This work aims to synthesize morphology-tuned ZnO nanostructures and evaluate their photocatalytic efficiency for cost-effective wastewater remediation. In this study, ZnO nanostructures with controlled morphologies were synthesized via a hydrothermal route by varying the synthesis time. ZnO nanostructures were characterized by XRD, UV–Vis, Raman, FTIR, FESEM, and TEM techniques. The analyses confirmed wurtzite crystallinity, revealed tunable crystallite sizes, demonstrated band gap narrowing, and enhanced morphology for photocatalytic efficiency in the synthesized ZnO nanostructures.. Notably, ZnO nanoflowers prepared over 7 h exhibited enhanced crystallinity, abundant oxygen vacancies, and a narrowed band gap, leading to improved visible light absorption and photocatalytic efficiency. Under 400-nm illumination, these nanostructures achieved 92% degradation of Rhodamine B within 320 min, following pseudo-first-order kinetics (R2 = 0.9566, t1/2 = 60 min). ROS scavenging studies revealed that superoxide anions were the dominant reactive species. The catalyst also showed excellent stability and reusability, highlighting its promise for practical wastewater remediation.The scope of this work lies in demonstrating the potential of morphology-engineered ZnO nanostructures as cost-effective and reusable photocatalysts for practical wastewater remediation applications. Hydrothermal synthesis time controls ZnO nanoparticle morphology and photocatalytic efficiency. Longer times yield well-defined, crystalline structures with higher activity, while shorter times produce less crystalline, less active particles. ZnO nanoflowers have a high surface area and unique petal-like morphology, enhancing visible light-driven dye degradation and making them efficient, eco-friendly agents for wastewater treatment.