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<p>In this study, nanostructured Bi<sub>2</sub>O<sub>3</sub>/ZnO p–n heterojunction photocatalyst was developed from ZnBi-NO<sub>3</sub> Layered Double Hydroxides (LDHs), which was prepared followed by facile co-precipitation&#xa0;method&#xa0;using Zn(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O, and Bi(NO<sub>3</sub>)<sub>3</sub>·5H<sub>2</sub>O salts as precursors. The synthesized materials were characterized well by FT-IR, XRD, EDX-SEM, and TGA techniques. The Tauc plot, followed by optical study, was plotted, and bandgap energy of Bi<sub>2</sub>O<sub>3</sub>/ZnO p–n heterojunction, was calculated, and found to be 1.8&#xa0;eV. The material was tested for photocatalytic degradation of methylene blue (MB) under visible light of a Tungsten lamp (100 W), and worked well at pH 8.0, concentration 10&#xa0;mg L<sup>−1</sup>&#xa0;MB, photocatalyst dosage 30&#xa0;mg and, stirring period of 60&#xa0;min at 25&#xa0;°C. Nanostructured Bi<sub>2</sub>O<sub>3</sub>/ZnO p-n heterojunction exhibited the efficiency of ≥ 95.00% with RSD ≤ 4.0%.</p>

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Nanostructured Bi2O3/ZnO p–n heterojunction photocatalyst derived from ZnBi-NO3 layered double hydroxides for photocatalytic degradation of methylene blue in water samples

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Muhammad Ishfaq Chohan,
  • Ali Nawaz Siyal,
  • Abdul Majid Channa,
  • Aydan Elçi,
  • Fozia Khatoon Soomro,
  • Aijaz Ahmed Bhutto

摘要

In this study, nanostructured Bi2O3/ZnO p–n heterojunction photocatalyst was developed from ZnBi-NO3 Layered Double Hydroxides (LDHs), which was prepared followed by facile co-precipitation method using Zn(NO3)2·6H2O, and Bi(NO3)3·5H2O salts as precursors. The synthesized materials were characterized well by FT-IR, XRD, EDX-SEM, and TGA techniques. The Tauc plot, followed by optical study, was plotted, and bandgap energy of Bi2O3/ZnO p–n heterojunction, was calculated, and found to be 1.8 eV. The material was tested for photocatalytic degradation of methylene blue (MB) under visible light of a Tungsten lamp (100 W), and worked well at pH 8.0, concentration 10 mg L−1 MB, photocatalyst dosage 30 mg and, stirring period of 60 min at 25 °C. Nanostructured Bi2O3/ZnO p-n heterojunction exhibited the efficiency of ≥ 95.00% with RSD ≤ 4.0%.