Scholarlink

<p>The development of sustainable nanomaterials through green synthesis methods has emerged as a promising alternative to conventional chemical processes, which often involve the use of toxic reagents. This study presents a green synthesis approach for fabricating zinc oxide (ZnO) nanoparticles (NPs) using <i>Syzygium malaccense</i> leaf extract. The formation of ZnO NPs was confirmed by UV-Vis spectroscopy, FTIR, XRD, SEM, and EDX. The photocatalytic efficiency of the synthesized ZnO NPs was evaluated for the degradation of ciprofloxacin (CIPRO) and its antimicrobial activity against <i>Pseudomonas aeruginosa</i>, <i>Enterobacter spp</i>., <i>Staphylococcus aureus</i>, and <i>Enterobacter cloacae</i> using disk diffusion and minimum inhibitory concentration (MIC) assays. UV-Vis spectroscopy, shows an absorption peak at 371&#xa0;nm and an optical band gap of 3.23&#xa0;eV, as determined from Tauc’s plot. Functional group analysis using FTIR identified characteristic Zn–O, Zn–O–Zn, C = C, and C-O bonds at 574, 1033, 1643 and 1188&#xa0;cm⁻¹ respectively. XRD analysis revealed a face-centred cubic (FCC) crystal structure with a prominent peak at 2θ = 26.55° and with an average crystallite size of 24.73 ± 2.90&#xa0;nm. SEM showed a heterogeneous morphology with slight particle aggregation. EDX confirmed the percentage elemental composition with 27.6% (Zn) and 61.08% (O). The photocatalytic activity of ZnO NPs was evaluated by degrading 10 ppm CIPRO, achieving an 88.10% degradation efficiency within 80&#xa0;min using 0.4&#xa0;g of ZnO NPs. The reaction followed pseudo-first-order kinetics with a rate constant of 0.0133&#xa0;min⁻¹. Additionally, ZnO NPs exhibited strong antimicrobial activity. This study underscores the promising application of plant-mediated synthesis of ZnO NPs using <i>Syzygium malaccens</i>e leaf extracts in environmental remediation and biomedical applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis of zinc oxide nanoparticles using Syzygium malaccense leaf extract: photocatalytic decomposition of ciprofloxacin and antimicrobial studies

  • 期刊论文

  • 发表日期：

    2025年6月30日

查看全文
  • Abayomi Bamisaye,
  • Omolola Adenike Oluboyede,
  • Nelson Oshogwue Etafo,
  • Muyideen Olaitan Bamidele,
  • Olajumoke T. Abiola‑Kuforiji,
  • Mopelola Abidemi Idowu

摘要

The development of sustainable nanomaterials through green synthesis methods has emerged as a promising alternative to conventional chemical processes, which often involve the use of toxic reagents. This study presents a green synthesis approach for fabricating zinc oxide (ZnO) nanoparticles (NPs) using Syzygium malaccense leaf extract. The formation of ZnO NPs was confirmed by UV-Vis spectroscopy, FTIR, XRD, SEM, and EDX. The photocatalytic efficiency of the synthesized ZnO NPs was evaluated for the degradation of ciprofloxacin (CIPRO) and its antimicrobial activity against Pseudomonas aeruginosa, Enterobacter spp., Staphylococcus aureus, and Enterobacter cloacae using disk diffusion and minimum inhibitory concentration (MIC) assays. UV-Vis spectroscopy, shows an absorption peak at 371 nm and an optical band gap of 3.23 eV, as determined from Tauc’s plot. Functional group analysis using FTIR identified characteristic Zn–O, Zn–O–Zn, C = C, and C-O bonds at 574, 1033, 1643 and 1188 cm⁻¹ respectively. XRD analysis revealed a face-centred cubic (FCC) crystal structure with a prominent peak at 2θ = 26.55° and with an average crystallite size of 24.73 ± 2.90 nm. SEM showed a heterogeneous morphology with slight particle aggregation. EDX confirmed the percentage elemental composition with 27.6% (Zn) and 61.08% (O). The photocatalytic activity of ZnO NPs was evaluated by degrading 10 ppm CIPRO, achieving an 88.10% degradation efficiency within 80 min using 0.4 g of ZnO NPs. The reaction followed pseudo-first-order kinetics with a rate constant of 0.0133 min⁻¹. Additionally, ZnO NPs exhibited strong antimicrobial activity. This study underscores the promising application of plant-mediated synthesis of ZnO NPs using Syzygium malaccense leaf extracts in environmental remediation and biomedical applications.