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<p>In this work, a visible-light-responsive ternary Ag<sub>3</sub>PO<sub>4</sub>/Graphene Oxide–ZnO composite was synthesized and systematically evaluated for its photoelectrocatalytic (PEC) performance. The catalysts were fabricated via a precipitation route. Utilizing a self-designed PEC reactor, the influences of GO loading, ZnO content, catalyst dosage, and initial pH on Congo red (CR) degradation were investigated. The employment of an appropriate GO amount markedly enhanced the dispersion and charge-transport behavior of Ag<sub>3</sub>PO<sub>4</sub>, while the incorporation of ZnO facilitated the formation of a stable ternary heterojunction. Under optimized conditions, the Ag<sub>3</sub>PO<sub>4</sub>–1%GO–75%ZnO catalyst achieved over 97% removal of 20&#xa0;mg L<sup>–1</sup> CR within 75&#xa0;min, maintaining approximately 95.5% efficiency after five successive cycles.</p>

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Photoelectrocatalytic degradation of congo red over a visible-light-responsive Ag3PO4/graphene oxide–ZnO ternary composite

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • Fuchen Ban,
  • Xinxin Zhang,
  • Yu Wei

摘要

In this work, a visible-light-responsive ternary Ag3PO4/Graphene Oxide–ZnO composite was synthesized and systematically evaluated for its photoelectrocatalytic (PEC) performance. The catalysts were fabricated via a precipitation route. Utilizing a self-designed PEC reactor, the influences of GO loading, ZnO content, catalyst dosage, and initial pH on Congo red (CR) degradation were investigated. The employment of an appropriate GO amount markedly enhanced the dispersion and charge-transport behavior of Ag3PO4, while the incorporation of ZnO facilitated the formation of a stable ternary heterojunction. Under optimized conditions, the Ag3PO4–1%GO–75%ZnO catalyst achieved over 97% removal of 20 mg L–1 CR within 75 min, maintaining approximately 95.5% efficiency after five successive cycles.