α-Fe2O3/TiO2 光催化材料的制备及其降解苯酚的性能

doi:10.11901/1005.3093.2024.219

材料研究学报

2025, Vol. 39

Issue (3): 233-240 DOI: 10.11901/1005.3093.2024.219

研究论文

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α-Fe₂O₃/TiO₂ 光催化材料的制备及其降解苯酚的性能

唐晨, 张耀宗(

), 王一凡, 刘超, 赵德润, 董鹏昊

华北理工大学建筑工程学院唐山 063000

Preparation of α-Fe₂O₃/TiO₂ Photocatalytic Material and Its Performance for Phenol Degradation

TANG Chen, ZHANG Yaozong(

), WANG Yifan, LIU Chao, ZHAO Derun, DONG Penghao

College of Architectural Engineering, North China University of Science and Technology, Tangshan 063000, China

引用本文:

唐晨, 张耀宗, 王一凡, 刘超, 赵德润, 董鹏昊. α-Fe₂O₃/TiO₂ 光催化材料的制备及其降解苯酚的性能[J]. 材料研究学报, 2025, 39(3): 233-240.
Chen TANG, Yaozong ZHANG, Yifan WANG, Chao LIU, Derun ZHAO, Penghao DONG. Preparation of α-Fe₂O₃/TiO₂ Photocatalytic Material and Its Performance for Phenol Degradation[J]. Chinese Journal of Materials Research, 2025, 39(3): 233-240.

全文: PDF(1996 KB) HTML

摘要:

用高温煅烧法制备α-Fe₂O₃/TiO₂新型复合材料并使用X射线衍射仪等手段对其表征，研究了在高压汞灯照射下其对苯酚的光催化降解性能。结果表明：这种复合材料中的纳米α-Fe₂O₃/TiO₂附着在纳米TiO₂上形成异质结构，使其可见光吸收区间明显变宽，带隙变窄(2.02~1.81 eV)。这种复合材料的比表面积和孔径体积(为66.4725 m²/g和0.3213 m³/g)，远高于单一催化剂，光催化性能优于α-Fe₂O₃。在α-Fe₂O₃和TiO₂复合质量比例为1∶10、复合材料投加量为0.6 g/L、苯酚浓度为20 mg/L、pH = 8、光照时间为120 min的条件下，苯酚的降解效率可达94.79%，远高于单一材料的性能。

关键词 ：复合材料, α-Fe₂O₃/TiO₂, 光催化, 苯酚

Abstract：

In order to solve the problems of low efficiency and high cost of catalyst in the treatment of phenol-containing wastewater by traditional photocatalytic technology, a new composite material of α-Fe₂O₃/TiO₂ was prepared by high temperature calcination. The prepared materials were characterized by X-ray diffractometer and other instruments, and their photocatalytic degradation of phenol was studied under the irradiation of 500W high voltage mercury lamp. The results of XRD and SEM showed that the composite material was successfully prepared, and the nano-α-Fe₂O₃ was attached to the nano-TiO₂ to form a heterostructure. FT-IR and UV-Vis detection showed that the composite material had good photocatalytic performance, its visible light absorption range was obviously widened, and the band gap was narrowed (2.02 eV to 1.81 eV). The specific surface area and pore volume were calculated to be 66.4725 m²/g and 0.3213 m³/g by BET test, which were much higher than that of single catalyst, further indicating that the photocatalytic performance of the composite was better than that of α-Fe₂O₃. In addition, the factors such as the composite ratio of α-Fe₂O₃ to TiO₂, the dosage of composite material, the concentration of phenol, pH and illumination time were optimized. The results show that the degradation efficiency of phenol can reach 94.79% in case that the test solution with phenol concentration of 20 mg/L and pH = 8, a dosage 0.6 g/L of the composite material with a mass ratio 1∶10 for α-Fe₂O₃to TiO₂ is adopted under the illumination of high voltage mercury lamp for 120 min. Which is much higher than that of single material.

Key words： composite α-Fe₂O₃/TiO₂ photochemical catalysis phenol

收稿日期: 2024-05-21

ZTFLH:

TB331

基金资助:河北省自然科学基金(E2022209044)

通讯作者: 张耀宗，副教授，zyaozong@163.com，研究方向为水污染控制及资源化

Corresponding author: ZHANG Yaozong, Tel: 13832512531, E-mail: zyaozong@163.com

作者简介: 唐晨，男，1998年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2024.219 或 https://www.cjmr.org/CN/Y2025/V39/I3/233

图1 复合材料FT(5/10/20/30)的XRD谱

图2 α-Fe2O3、TiO2和FT10的SEM照片

图3 α-Fe2O3、TiO2和复合材料FT(5/10/20/30)的FT-IR谱

图4 FT10和α-Fe2O3的可见光吸收曲线

图5 FT10的氮气吸附-脱附等温曲线和孔径分布曲线

图6 不同复合比例复合材料的苯酚降解曲线

图7 苯酚的pH值对降解效果的影响

图8 催化剂投加量对苯酚降解的影响

图9 苯酚浓度对降解效果的影响

图10 α-Fe2O3/TiO2复合材料对苯酚的降解效果和一级动力学拟合曲线

图11 FT10对苯酚的光催化降解的机理

图12 FT10的重复使用性能

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