应用化学 ›› 2022, Vol. 39 ›› Issue (10): 1572-1578.DOI: 10.19894/j.issn.1000-0518.220014

• 研究论文 • 上一篇    下一篇

Fe/V-Sb2O3复合材料的构筑及光催化降解医药废水

周玉凤1, 周川巍2, 胡桐泽2, 段展鹏2, 王颢潼2, 石淑云2()   

  1. 1.吉林师范大学辽源分院,辽源 136200
    2.吉林师范大学环境科学与工程学院,四平 136000
  • 收稿日期:2022-01-16 接受日期:2022-04-28 出版日期:2022-10-01 发布日期:2022-10-05
  • 通讯作者: 石淑云

Synthesis of Fe/V‑Sb2O3 Composites and UV‑light Catalytic Degradation of Pharmaceutical Wastewater

Yu-Feng ZHOU1, Chuan-Wei ZHOU2, Tong-Ze HU2, Zhan-Peng DUAN2, Hao-Tong WANG2, Shu-Yun SHI2()   

  1. 1.Liaoyuan Branch of Jilin Normal University,Liaoyuan 136200,China
    2.College of Environmental Engineering,Jilin Normal University,Siping 136000,China
  • Received:2022-01-16 Accepted:2022-04-28 Published:2022-10-01 Online:2022-10-05
  • Contact: Shu-Yun SHI
  • About author:ltd920618@163.com

摘要:

采用化学沉积和焙烧结合方法制备Fe/V共掺杂立方晶型三氧化二锑(Sb2O3)复合材料。通过紫外可见分光光度计和红外光谱仪对合成复合材料进行谱学表征,通过X射线粉末衍射和光电子能谱对其存在形式和成分分析。以合成复合材料为光催化剂光催化降解模拟医药废水四环素(TC),并通过添加不同捕获剂初步分析光催化活性机理。实验结果表明,Fe和V元素成功掺杂Sb2O3体系中,经过硫酸处理焙烧制成的Fe/V共掺杂立方晶型Sb2O3复合材料对光的吸收由紫外区向可见光区扩展且吸收峰增强,其中H2SO4浸渍浓度为4 mol/L吸收峰最强。以此工艺条件下制备的复合材料为催化剂,在紫外光反应时间为180 min时对TC降解率可达99.3%,且具有较小的禁带宽度为2.15 eV,较大的光电流响应值0.79 mA和较小的交流阻抗内阻355 Ω。捕获实验和催化机理分析表明光催化产生的活性基团是羟基自由基起主导作用。

关键词: Fe/V-Sb2O3复合材料, 光催化剂, 光催化反应机理, 降解率, 医药废水

Abstract:

In this paper, Fe/V doped cubic Sb2O3 crystalline composites are successfully prepared by chemical deposition and roasting methods. The samples are characterized by using infrared spectroscopy and ultraviolet spectrophotometry, and elemental composition and characteristics are also analyzed by X-ray diffraction and X-ray photoelectron spectroscopy. The mechanism of photo-degradation of pharmaceutical wastewater TC is studied by the addition of inhibitors. Spectral characterization shows that the light absorption of the Fe/V doped cubic Sb2O3 crystalline composites with the sulfuric acid dipping gradually extends from ultraviolet region to visible region, in which, the absorption peak of the impregnation concentration of 4 mol/L H2SO4 is the strongest. The photocatalytic degradation rate of TC can reach 99.3% by using optimized composites as the photocatalyst with the reaction time of 180 min. It also performs the smallest band gap value for 2.15 eV, the maximum photocurrent value (0.79 mA) and the smallest AC impedance value (355 Ω). The results of capture experiment and the analysis of catalytic mechanism are consistent that the hydroxyl radical produced during photodegradation plays a leading role.

Key words: Fe/V-Sb2O3 composite material, Photocatalyst, Photocatalytic mechanism, Degradation rate, Pharmaceutical wastewater

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