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<p>An efficient CdS nanoparticles (NPs) anchored Bi<sub>2</sub>MoO<sub>6</sub> composite catalyst was successfully synthesized via a two-step hydrothermal route and thoroughly characterized using advanced instruments to assess photocatalytic degradation and electrochemical hydrogen evolution activity. The optimal loading of CdS NPs on the surface of Bi<sub>2</sub>MoO<sub>6</sub> (BMO-CdS) microspheres results in an improved photocatalytic efficiency for CR removal of 85.2% within 120&#xa0;min of visible-light irradiation. The enhancement is primarily due to the CdS NPs’ improved photoabsorption ability and an effective reduction in photoinduced electron–hole recombination rate by transferring electrons from one junction to another. The seven consecutive recycle experiments demonstrate the catalysts’ excellent stability, while the scavenging experiments confirm that the primary active radicals accountable for CR aqueous dye degradation are ·O<sub>2</sub>ˉ and h<sup>+</sup>. Based on experimental results, we propose a possible photocatalytic mechanism for BMO-CdS heterojunctions, which could serve as a theoretical foundation for future research. Furthermore, the electrochemical water splitting for hydrogen evolution reaction results showed that the BMO-CdS-15 had a minimum overpotential of -82.92&#xa0;mV to reach 10&#xa0;mA/cm<sup>2</sup> and a Tafel slope of 173&#xa0;mV/dec. The BMO-CdS-15 catalyst-coated nickel foam electrode exhibits excellent stability as measured by an amperometric i-t curve over 24&#xa0;h, and XRD results after stability indicate excellent phase stability. The current study demonstrated a dual-functional BMO-CdS heterojunction photo/electrocatalyst with excellent photocatalytic and electrochemical performance.</p>

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Heterostructured CdS anchored Bi2MoO6 bi-functional catalyst for the maximized photocatalytic degradation and hydrogen evolution activity

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • T. Kalaiarasi,
  • K. Thirupugalmani,
  • R. Marnadu,
  • Vasudeva Reddy Minnam Reddy,
  • Woo Kyoung Kim,
  • Razan A. Alshgari,
  • Saikh Mohammad

摘要

An efficient CdS nanoparticles (NPs) anchored Bi2MoO6 composite catalyst was successfully synthesized via a two-step hydrothermal route and thoroughly characterized using advanced instruments to assess photocatalytic degradation and electrochemical hydrogen evolution activity. The optimal loading of CdS NPs on the surface of Bi2MoO6 (BMO-CdS) microspheres results in an improved photocatalytic efficiency for CR removal of 85.2% within 120 min of visible-light irradiation. The enhancement is primarily due to the CdS NPs’ improved photoabsorption ability and an effective reduction in photoinduced electron–hole recombination rate by transferring electrons from one junction to another. The seven consecutive recycle experiments demonstrate the catalysts’ excellent stability, while the scavenging experiments confirm that the primary active radicals accountable for CR aqueous dye degradation are ·O2ˉ and h+. Based on experimental results, we propose a possible photocatalytic mechanism for BMO-CdS heterojunctions, which could serve as a theoretical foundation for future research. Furthermore, the electrochemical water splitting for hydrogen evolution reaction results showed that the BMO-CdS-15 had a minimum overpotential of -82.92 mV to reach 10 mA/cm2 and a Tafel slope of 173 mV/dec. The BMO-CdS-15 catalyst-coated nickel foam electrode exhibits excellent stability as measured by an amperometric i-t curve over 24 h, and XRD results after stability indicate excellent phase stability. The current study demonstrated a dual-functional BMO-CdS heterojunction photo/electrocatalyst with excellent photocatalytic and electrochemical performance.