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

doi:10.19894/j.issn.1000-0518.220014

Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (10): 1572-1578.DOI: 10.19894/j.issn.1000-0518.220014

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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.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

Abstract

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

CLC Number:

O635

Yu-Feng ZHOU, Chuan-Wei ZHOU, Tong-Ze HU, Zhan-Peng DUAN, Hao-Tong WANG, Shu-Yun SHI. Synthesis of Fe/V‑Sb₂O₃ Composites and UV‑light Catalytic Degradation of Pharmaceutical Wastewater[J]. Chinese Journal of Applied Chemistry, 2022, 39(10): 1572-1578.

Figures/Tables 10

Fig.1 XRD spectra of Fe/V-Sb2O3 composite

Fig.2 FI-IR spectra of Fe/V-Sb2O3 composite

Fig.3 （A） UV-Vis DRS and （B） Tauc′s plots of the Fe/V-Sb2O3 composite

Fig.4 The XPS spectra of Fe/V-Sb2O3 composite （A）， Sb（B）， Fe（C） and V（D）

Fig.5 The N2 adsorption-desorption isotherms of Fe/V-Sb2O3 composite

Fig.6 （A） The degradation rates of TC and （B） plots of first-order reaction kinetics of Fe/V-Sb2O3 composite

Fig.7 Recycle ability test of of Fe/V-Sb2O3 composite up to four cycles

Fig.8 （A） Transient photocurrent responses and （B） EIS of the Fe/V-Sb2O3 composite

Fig.9 Degradation rate of TC with the trapping agents

Fig.10 Schematic representation of the proposed mechanism of Fe/V-Sb2O3 composite

References 20

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

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