| 一锅法制备S型异质结光催化剂Fe2O3/Fe2TiO5及其高效降解有机污染物性能 | |
| One-Pot Preparation of Fe2O3/Fe2TiO5 S-Scheme Heterojunction Photocatalyst for Highly Efficient Degradation of Organic Pollution | |
| 摘要: 首次采用简单的一锅法制备了Fe2O3/Fe2TiO5异质结纳米材料。构建S型异质结后，与纯的Fe2O3和Fe2TiO5相比，Fe2O3/Fe2TiO5复合材料表现出更高的光催化降解速率和效率。经过2.5 h的光照后，Fe2O3/Fe2TiO5可以降解接近100%的亚甲基蓝（MB）。在Fe2O3/Fe2TiO5复合材料中，Fe2O3和Fe2TiO5之间形成了内建电场，可以促进光生电子-空穴对的分离。因此，具有更高能量的Fe2TiO5导带中的电子和具有更高能量的Fe2O3价带中的空穴可以得到有效的保留，从而使它们更加有效地扩散到催化剂表面，并参加降解反应。此外，Fe2O3/Fe2TiO5复合材料具有很好的光催化稳定性。 | |
| 关键词: Fe2O3 Fe2TiO5 异质结 光催化 | |
| 基金项目: 中央级公益性科研院所基本科研业务费专项资金项目（No.TKS190408）、交通运输部天津水运工程科学研究所部门发展基金（No.KJFZJJ190201）和上海市科委科研计划项目（No.19DZ1204303）资助。 | |
| Abstract: For the first time, Fe2O3/Fe2TiO5 heterojunction materials have been fabricated by a facile one-pot solvothermal method. After the construction of the S-scheme heterojunction, compared to pure Fe2O3 and Fe2TiO5, the photocatalytic degradation rate and efficiency of Fe2O3/Fe2TiO5 were significantly improved. After being illuminated for 2.5 h, nearly 100% of methylene blue (MB) has been degraded by Fe2O3/Fe2TiO5. In Fe2O3/Fe2TiO5 composite material, a built-in field is formed between Fe2O3 and Fe2TiO5, thus promoting the separation of photogenerated electron-hole pairs. Therefore, electrons in the conduction band (CB) of Fe2TiO5 and holes in the valence band (VB) of Fe2O3 with higher energy, which show high reduction and oxidation capacity, respectively, can retain and transfer to the surface to participate in the degradation reaction. Moreover, Fe2O3/Fe2TiO5 composite showed good photocatalytic stability. | |
| Keywords: Fe2O3 Fe2TiO5 heterojunction photocatalytic | |
| 投稿时间：2022-03-22 修订日期：2022-07-01 | |
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| 常方,赵英杰,寿幼平,张騄,王江南,石婷婷.一锅法制备S型异质结光催化剂Fe2O3/Fe2TiO5及其高效降解有机污染物性能[J].无机化学学报,2022,38(9):1862-1870. | |
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