Facile Synthesis and Characterization of Molybdenum Oxide (MoO3) Nanofibers and Submicron Rods by Electrospinning Technique for Potential Application in Photocatalytic Activity,Journal of Cluster Science

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Facile Synthesis and Characterization of Molybdenum Oxide (MoO3) Nanofibers and Submicron Rods by Electrospinning Technique for Potential Application in Photocatalytic Activity
Journal of Cluster Science ( IF 2.7 ) Pub Date : 2021-08-16 , DOI: 10.1007/s10876-021-02146-w
R. Thangappan ₁ , R. Dhinesh Kumar ₂ , R. Jayavel ₃

Affiliation

The nanofiber with fiber morphology was a key parameter that can effectively overcome the electron–hole fast recombination issue and enhance the activity of photocatalyst under the visible light irradiation. In this work, MoO₃ nanofibers and MoO₃ submicron rods are fabricated through a simple electrospinning method with polyvinyl pyrrolidone/ammonium molybdate as a source to obtain the composite fibers. The composite fibers were treated to various calcination temperatures in order to obtain MoO₃ fibers and MoO₃ rods. The resultant samples were calcined at 350 °C and 550 °C respectively. The diameter ranges from 150 to 250 nm are obtained for lower temperature 350 °C and after the calcination of MoO₃ nanofibers at 550 °C the rods of submicron sizes were formed. Further to study the optical absorption and photocatalyst properties, UV–Vis spectrophotometer was used for the analysis and the band gap energy for the prepared sample from Tauc plot was found to be 3.135 eV. The synthesized MoO₃ rods (i.e.) annealed MoO₃ nanofibers at 550 °C exhibited strong photocatalytic degradation of methylene orange up to 94% in the presence of sunlight without using any oxidizing agents.

Graphic Abstract

The photocatalytic degradation of 94% was recorded for annealed MoO₃ nanofibers in presence of sun light without using any oxidizing agents.

中文翻译：

通过静电纺丝技术轻松合成和表征氧化钼 (MoO3) 纳米纤维和亚微米棒在光催化活性中的潜在应用

具有纤维形态的纳米纤维是有效克服电子-空穴快速复合问题并提高可见光照射下光催化剂活性的关键参数。在这项工作中，以聚乙烯吡咯烷酮/钼酸铵为原料，通过简单的静电纺丝方法制备了MoO ₃纳米纤维和 MoO ₃亚微米棒，以获得复合纤维。将复合纤维处理到不同的煅烧温度以获得MoO ₃纤维和MoO ₃棒。所得样品分别在350°C和550°C下煅烧。在 350 °C 的较低温度下和 MoO ₃煅烧后获得的直径范围为 150 至 250 nm纳米纤维在 550 °C 下形成亚微米尺寸的棒。为了进一步研究光吸收和光催化剂特性，使用紫外-可见分光光度计进行分析，发现从 Tauc 图中制备的样品的带隙能量为 3.135 eV。合成的 MoO ₃棒（即）在 550 °C 下退火的 MoO ₃纳米纤维在阳光下表现出高达 94% 的强光催化降解亚甲基橙，而无需使用任何氧化剂。