Tuning structural and optical properties of GO@Mn-doped Co3O4 hybrid nanocomposite by a facile synthesis

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Synthetic Metals Pub Date : 2024-10-24 DOI:10.1016/j.synthmet.2024.117771

Khizar Hayat, Misbah Kiran, Muhammad Imran Yousaf

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Abstract

Metal and metal oxide materials are mostly used to tune the optical characteristics. The optical and systemic effects of pure Cobalt Oxide (Co₃O₄) are examined by knocking out the dissimilar assemblage of Manganese (Mn) ions using the co-precipitation method. Graphene oxide (GO) reduces the optical band gap and enhances the effects of ethical Co₃O₄ and MnCo₃O₄ by hydrothermal procedure. The percentage of Mn over pure Co₃O₄ was 0.09 wt%, 0.18 wt%, 0.27 wt%, and GO doped over MnCo₃O₄ was 1 wt%. Remarkably, spinel-type cobalt oxide has two participation band gaps at 494 nm and 772 nm of nanocomposites which then shifted from 494 nm to 510 nm and 772 nm to 779 nm with the doping of GO. The result describes that the band gap was minimized from 1.76 eV to 1.59 eV respectively to accommodate the density of states by doping of Mn ions and GO. Conductivity and optical absorbance were also increased by doping assemblage of Mn ions and GO. XRD peaks show the FCC crystalline structure of Co₃O₄, and the GO peak disappeared for @MnCo₃O₄, indicating that GO was completely reduced to rGO during the synthesis process.

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通过简易合成调控 GO@Mn 掺杂 Co3O4 混合纳米复合材料的结构和光学特性

金属和金属氧化物材料通常用于调节光学特性。通过共沉淀法去除锰（Mn）离子的异种组合，研究了纯氧化钴（Co3O4）的光学效应和系统效应。通过水热法，氧化石墨烯（GO）降低了光带隙，增强了伦理 Co3O4 和 MnCo3O4 的效果。锰在纯 Co3O4 中的比例分别为 0.09 wt%、0.18 wt%、0.27 wt%，而 GO 在 MnCo3O4 中的掺杂比例为 1 wt%。值得注意的是，尖晶石型氧化钴在纳米复合材料的 494 纳米和 772 纳米处有两个参与带隙，随着 GO 的掺入，带隙从 494 纳米转移到 510 纳米，从 772 纳米转移到 779 纳米。结果表明，通过掺杂锰离子和 GO，带隙分别从 1.76 eV 减小到 1.59 eV，以适应态密度。锰离子和 GO 的掺杂组合还提高了导电性和光吸收率。XRD 峰显示了 Co3O4 的 FCC 晶体结构，@MnCo3O4 的 GO 峰消失，表明在合成过程中 GO 已完全还原为 rGO。

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.