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<p>In this study, a novel binary Nb<sub>2</sub>O<sub>5</sub>/g-C<sub>3</sub>N<sub>5</sub> (Nb<sub>2</sub>O<sub>5</sub>/CN) heterojunction nanocomposite was synthesized <i>via</i> hydrothermal synthesis followed by ultrasonication. The crystal phase, chemical state, morphology, elemental composition, surface area, optical properties, and charge separation were systematically evaluated. Nb<sub>2</sub>O<sub>5</sub>/10 wt% CN achieved 98.4% within 70&#xa0;min. The greater photocatalytic activity might be due to the loading of the optimized weight% of CN onto bare Nb<sub>2</sub>O<sub>5</sub>, which leads to effective charge separation and charge transfer due to Z-scheme heterojunction formation. The Z-scheme mechanism was illustrated by quenching experiments and a terephthalic acid (TA) test. The possible degradation pathway of Ibuprofen (IBP) was verified using GC-MS analysis. This new avenue of Nb<sub>2</sub>O<sub>5</sub>/ 10 wt% CN as a Z-scheme heterojunction is a sustainable and environmentally friendly method for the purification of water pollutants.</p>

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Advanced Z-Scheme Nb2O5/g-C3N5 Photocatalyst for Solar-Driven Ibuprofen Degradation: Synergistic Effects and Mechanistic Exploration

  • 期刊论文

  • 发表日期：

    2026年7月25日

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  • K. M. Devi Satiya,
  • B. Filip Jones,
  • M. Arunpandian,
  • K. Selvakumar,
  • E. R. Nagarajan

摘要

In this study, a novel binary Nb2O5/g-C3N5 (Nb2O5/CN) heterojunction nanocomposite was synthesized via hydrothermal synthesis followed by ultrasonication. The crystal phase, chemical state, morphology, elemental composition, surface area, optical properties, and charge separation were systematically evaluated. Nb2O5/10 wt% CN achieved 98.4% within 70 min. The greater photocatalytic activity might be due to the loading of the optimized weight% of CN onto bare Nb2O5, which leads to effective charge separation and charge transfer due to Z-scheme heterojunction formation. The Z-scheme mechanism was illustrated by quenching experiments and a terephthalic acid (TA) test. The possible degradation pathway of Ibuprofen (IBP) was verified using GC-MS analysis. This new avenue of Nb2O5/ 10 wt% CN as a Z-scheme heterojunction is a sustainable and environmentally friendly method for the purification of water pollutants.