Microwave synthesis of sulfur‐doped α‐Fe2O3 and testing in photodegradation of methyl orange,Journal of the Chinese Chemical Society

当前位置： X-MOL 学术 › J. Chin. Chem. Soc. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Microwave synthesis of sulfur‐doped α‐Fe2O3 and testing in photodegradation of methyl orange
Journal of the Chinese Chemical Society ( IF 1.6 ) Pub Date : 2020-04-22 , DOI: 10.1002/jccs.202000035
Layla S. Almazroai ₁ , Leenah A. Maliabari ₁

Affiliation

α‐Fe₂O₃, as a promising photocatalyst in environmental aspects, was doped by a nonmetal to enhance the optical and electronic properties. Sulfur‐doped hematite was synthesized by microwave irradiation. The samples were investigated by X‐ray diffraction and energy dispersive X‐ ray‐scanning electron microscopy. Nanostructure particles have a hexagonal structure that did not change after sulfur incorporation. The optical studies via UV–Visible spectroscopy proved the high absorbance of S/α‐Fe₂O₃under the visible region. Moreover, the band gap of S/α‐Fe₂O₃ was shifted to higher wavelengths. However, nonmetals may exhibit a negative effect and act as recombination centers as the photoactivity of undoped hematite was still higher in the photodegradation of methyl orange as a pollutant. H₂O₂ as an oxidant was fourfold better than O₂, leading to the formation of the active oxygen species. The preparation method plays a crucial role in the shaping of nanostructure particles and its photoactivity.

中文翻译：

微波合成硫掺杂的α-Fe2O3及光催化降解甲基橙

的α-Fe ₂ ö ₃，如在环境方面有希望的光催化剂，是由非金属掺杂，以增强光学和电子特性。硫掺杂赤铁矿是通过微波辐射合成的。通过X射线衍射和能量色散X射线扫描电子显微镜对样品进行了研究。纳米结构颗粒具有六边形结构，该结构在硫结合后不会改变。通过紫外-可见光谱的光学研究证明S /α-Fe的高吸光度₂ ö ₃可见区域下。此外，S的带隙/的α-Fe ₂ ö ₃被转移到更高的波长。然而，非金属可能表现出负面影响并充当重组中心，因为在作为污染物的甲基橙的光降解中，未掺杂赤铁矿的光活性仍然更高。作为氧化剂的H ₂ O ₂比O ₂好四倍，从而导致了活性氧的形成。该制备方法在纳米结构颗粒的形状及其光活性中起关键作用。

更新日期：2020-04-22

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11