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<p>Mo-doped ZnO nanocomposite was synthesized by using auto-combustion method. X-ray diffraction patterns of prepared nanocomposite indicated effective construction of crystalline Mo/ZnO NCs with co-existence of MoO<sub>2</sub> and ZnO in required weight ratio. XRD results revealed also that ZnO crystallite size decreased as Mo-doping concentration increased. The direct band gap reduced from 3.309&#xa0;eV of (MZ-0) to 3.258&#xa0;eV of (MZ-5), demonstrating a negative correlation with Mo-doping levels. The electrocatalytic activity of Mo/ZnO NCs was assessed by their capability to degrade <i>Indigo Carmine (IC)</i> and <i>Murexide (ME) dyes,</i> and their antibacterial properties were also evaluated. The electrocatalytic (EC) degradation efficiencies for <i>IC</i> and <i>ME</i> dyes with NC coded MZ-5 were 96.8% (0.189&#xa0;min⁻<sup>1</sup>) and 99.5% (0.478&#xa0;min⁻<sup>1</sup>), respectively, through 14 and 10&#xa0;min of reaction time. Also, MZ-5 NCs exhibited high photo-electrocatalysis (PEC) efficiency of 95.2% after 12&#xa0;min, which was higher than that of electrolysis and EC, of 66% and 89%, respectively, under the same conditions. The main role of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({OH}^{\cdot }\)</EquationSource> </InlineEquation> radicals as dominant reactive oxygen species in photo electrocatalysis (PEC) degradation for IC dye. The antimicrobial activity of different Mo/ZnO NCs doses against <i>Gram-negative</i>, <i>Gram-positive,</i> and pathogenic fungi was investigated. Thus, this nanocomposite structure demonstrates significant antimicrobial activity and is recognized as a promising solution for dye degradation.</p> Graphical abstract <p>Schematic diagram showing preparation route of Mo-doped ZnO nanocomposite.</p> <p></p>

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Molybdenum-doped zinc oxide nanocomposite for sustainable photo-electrocatalytic degradation of dyes and antimicrobial activity

  • 期刊论文

  • 发表日期：

    2026年5月3日

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  • Mohammed G. M. Zeariya,
  • Amr Negm,
  • Shahira H. EL-Moslamy,
  • Samar A. Salim,
  • V. Ganesh,
  • H. Y. Zahran,
  • Gannah I. Yahia,
  • Sara Kh. M. El-Shennawy,
  • Elbadawy A. Kamoun,
  • Ibrahim S. Yahia

摘要

Mo-doped ZnO nanocomposite was synthesized by using auto-combustion method. X-ray diffraction patterns of prepared nanocomposite indicated effective construction of crystalline Mo/ZnO NCs with co-existence of MoO2 and ZnO in required weight ratio. XRD results revealed also that ZnO crystallite size decreased as Mo-doping concentration increased. The direct band gap reduced from 3.309 eV of (MZ-0) to 3.258 eV of (MZ-5), demonstrating a negative correlation with Mo-doping levels. The electrocatalytic activity of Mo/ZnO NCs was assessed by their capability to degrade Indigo Carmine (IC) and Murexide (ME) dyes, and their antibacterial properties were also evaluated. The electrocatalytic (EC) degradation efficiencies for IC and ME dyes with NC coded MZ-5 were 96.8% (0.189 min⁻1) and 99.5% (0.478 min⁻1), respectively, through 14 and 10 min of reaction time. Also, MZ-5 NCs exhibited high photo-electrocatalysis (PEC) efficiency of 95.2% after 12 min, which was higher than that of electrolysis and EC, of 66% and 89%, respectively, under the same conditions. The main role of \({OH}^{\cdot }\) radicals as dominant reactive oxygen species in photo electrocatalysis (PEC) degradation for IC dye. The antimicrobial activity of different Mo/ZnO NCs doses against Gram-negative, Gram-positive, and pathogenic fungi was investigated. Thus, this nanocomposite structure demonstrates significant antimicrobial activity and is recognized as a promising solution for dye degradation.

Graphical abstract

Schematic diagram showing preparation route of Mo-doped ZnO nanocomposite.