β-FeOOH/TiO<sub>2</sub>复合催化剂的制备及其光-芬顿催化降解酸性橙Ⅱ性能

丁付革; 郭玉祥; 袁大英; 张必宪; 朱靖; 徐轶群; 胡庆松

doi:10.13205/j.hjgc.202308010

β-FeOOH/TiO₂复合催化剂的制备及其光-芬顿催化降解酸性橙Ⅱ性能

doi: 10.13205/j.hjgc.202308010

1. 中交上海航道局有限公司江苏交通建设工程分公司, 南京 210019;
2. 扬州大学环境科学与工程学院, 江苏扬州 225009

基金项目:

中国博士后科学基金面上资助项目(2021M691389)

沿江城区内源污染控制及生态修复技术研究项目(SHJKJ-2020-28)

详细信息

作者简介:
丁付革(1981-),男,本科,高级工程师,主要研究方向为水污染控制工程与资源化。286083327@qq.com

通讯作者:
胡庆松(1989-),男,博士研究生,讲师,主要研究方向为水污染控制化学。huqs_890115@126.com

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出版历程
- 收稿日期: 2022-08-25
- 网络出版日期: 2023-11-15

CONTROLLABLE CONSTRUCTION OF β-FeOOH/TiO₂ NANOCOMPOSITE AND ITS PERFORMANCE IN PHOTO-FENTON DEGRADATION OF ACID ORANGE Ⅱ

1. Jiangsu Traffic Construction Engineering Branch, Shanghai Dredging Co., Ltd, Nanjing 210019, China;
2. College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, China

摘要

摘要: 采用浸渍-超声-煅烧的方法将β-FeOOH和TiO₂复合,制备了不同比例的β-FeOOH/TiO₂复合光催化剂来降解酸性橙Ⅱ。通过X-射线粉末衍射仪(XRD)、透射电子显微镜(TEM)、X-射线光电子能谱仪(XPS)、红外光谱仪(FT-IR)研究复合催化剂组成及微观结构。在模拟太阳光照射下,加入H₂O₂研究复合催化剂光催化降解酸性橙Ⅱ性能,并对其降解机理进行探究。结果表明:当m(β-FeOOH)∶m(TiO₂)为3∶1,初始反应pH值为3.05,H₂O₂的投加浓度为20 mmol/L时,酸性橙Ⅱ降解效率最佳。自由基猝灭实验和电子自旋共振技术(ESR)分析结果表明,在降解酸性橙Ⅱ过程中,羟基自由基(·OH)和超氧自由基(O^-₂·)是主要的活性氧物种,将酸性橙Ⅱ矿化分解。研究工作为印染废水的治理提供一种新思路。
- 酸性橙Ⅱ /
- 光芬顿 /
- 纳米复合催化剂 /
- 过氧化氢 /
- 自由基反应
Abstract: To solve the increasingly serious environmental contamination, it is urgent to develop novel and highly efficient technologies for remedying environmental pollution. Photocatalytic oxidation can convert solar energy into chemical energy, which provides a promising method for contaminant removal. In this work, β-FeOOH and TiO₂ are compounded via the impregnation-ultrasonic-calcination method. And β-FeOOH/TiO₂ composite catalysts with different weight ratios were obtained. The composition and microstructure were studied by X-ray powder diffractor (XRD), transmission electron microscope (TEM), X-ray photoelectron spectrometer (XPS) and infrared spectrometer (FT-IR). And the tight interface contact between β-FeOOH and TiO₂ was observed via TEM analysis. The photocatalytic degradation of acid orange Ⅱ (AOⅡ) was evaluated with the addition of H₂O₂ under the irradiation of simulated sunlight. And the degradation mechanism was explored in detail. The experimental results demonstrated that the highest degradation efficiency was achieved, when the weight ratio of β-FeOOH and TiO₂ was 3∶1, the initial pH value was around 3.05, and the concentration of H₂O₂ was 20 mmol/L. Moreover, radical quenching experiments and electron spin resonance (ESR) analysis result indicated that hydroxyl radical (·OH) and superoxide radical (O₂^·-) act the key roles in the degradation process of acid orange Ⅱ. This research can provide new thoughts on the remediation of dyeing wastewater.
- acid orange Ⅱ /
- photo-Fenton /
- nanocomposite catalyst /
- hydrogen peroxide /
- free radical reaction

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