Scholarlink

<p>This study reports the successful fabrication of manganese oxide: zinc oxide bimetallic nanocomposites, employing aqueous extract of <i>Curcuma zedoaria.</i> Biological potential and electrical properties of the composites have also been evaluated. The composites were fabricated using manganese and zinc salts in different ratios, i.e., 1:1, 1:2, and 2:1, referred to as MnO<sub>1</sub>:ZnO<sub>1</sub>, MnO<sub>1</sub>:ZnO<sub>2</sub>, and MnO<sub>2</sub>:ZnO<sub>1</sub>, respectively. X-ray diffraction studies revealed the crystalline nature of the composites, with crystallite sizes of 21&#xa0;nm for both MnO<sub>1</sub>:ZnO<sub>1</sub> and MnO<sub>1</sub>:ZnO<sub>2</sub>, and 23&#xa0;nm for MnO<sub>2</sub>:ZnO<sub>1</sub>. Moreover, the composites were demonstrated to be quite stable at high temperature. The MnO<sub>2</sub>:ZnO<sub>1</sub> composite exhibited the strongest anti-bacterial (zone of inhibition = 21&#xa0;mm) and anti-fungal (zone of inhibition = 18&#xa0;nm) activities, as compared to the other composites. On the other hand, the MnO<sub>1</sub>:ZnO<sub>2</sub> composite inhibited the DPPH radical strongly. Strong anti-leishmanial activity was shown by all the composites with IC<sub>50</sub> values of 0.03 (MnO<sub>1</sub>:ZnO<sub>1</sub>), 0.14 (MnO<sub>1</sub>:ZnO<sub>2</sub>), and 4.3 (MnO<sub>2</sub>:ZnO<sub>1</sub>) <i>µ</i>g/mL. The nanocomposites also displayed optimum energy storage and semiconducting abilities. The band gaps calculated for MnO<sub>1</sub>:ZnO<sub>1</sub>, MnO<sub>1</sub>:ZnO<sub>2</sub>, and MnO<sub>2</sub>:ZnO<sub>1</sub> were found to be 3.18, 3.26, and 3.11&#xa0;eV, respectively. Optimum value of dielectric constant (~ 0.95) and capacitance (~ 1.0 pF) were observed for MnO<sub>2</sub>:ZnO<sub>1</sub>, while the MnO<sub>1</sub>:ZnO<sub>2</sub> composite exhibited the best AC conductivity (1.8 × 10<sup>− 9</sup> S/m). All the samples exhibited the inverse relationship between capacitance and AC conductivity. The work thus shows that the combination of Mn and Zn imparts special characteristics to the nanocomposite, making it biologically effective and at the same time a suitable candidate for use in semiconductors.</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

Green Synthesis, Biological Potential, and Semiconducting Properties of MnO:ZnO Bimetallic Nanocomposites

  • 期刊论文

  • 发表日期：

    2025年3月24日

查看全文
  • Sheema,
  • Salman Zafar,
  • Sardar Khan,
  • Qaisar Jamal,
  • Muhammad Uzair,
  • Sajeela Akbar,
  • Moeen Uddin,
  • Mehwish Abbas,
  • Asim Ali,
  • Hamza Ali

摘要

This study reports the successful fabrication of manganese oxide: zinc oxide bimetallic nanocomposites, employing aqueous extract of Curcuma zedoaria. Biological potential and electrical properties of the composites have also been evaluated. The composites were fabricated using manganese and zinc salts in different ratios, i.e., 1:1, 1:2, and 2:1, referred to as MnO1:ZnO1, MnO1:ZnO2, and MnO2:ZnO1, respectively. X-ray diffraction studies revealed the crystalline nature of the composites, with crystallite sizes of 21 nm for both MnO1:ZnO1 and MnO1:ZnO2, and 23 nm for MnO2:ZnO1. Moreover, the composites were demonstrated to be quite stable at high temperature. The MnO2:ZnO1 composite exhibited the strongest anti-bacterial (zone of inhibition = 21 mm) and anti-fungal (zone of inhibition = 18 nm) activities, as compared to the other composites. On the other hand, the MnO1:ZnO2 composite inhibited the DPPH radical strongly. Strong anti-leishmanial activity was shown by all the composites with IC50 values of 0.03 (MnO1:ZnO1), 0.14 (MnO1:ZnO2), and 4.3 (MnO2:ZnO1) µg/mL. The nanocomposites also displayed optimum energy storage and semiconducting abilities. The band gaps calculated for MnO1:ZnO1, MnO1:ZnO2, and MnO2:ZnO1 were found to be 3.18, 3.26, and 3.11 eV, respectively. Optimum value of dielectric constant (~ 0.95) and capacitance (~ 1.0 pF) were observed for MnO2:ZnO1, while the MnO1:ZnO2 composite exhibited the best AC conductivity (1.8 × 10− 9 S/m). All the samples exhibited the inverse relationship between capacitance and AC conductivity. The work thus shows that the combination of Mn and Zn imparts special characteristics to the nanocomposite, making it biologically effective and at the same time a suitable candidate for use in semiconductors.