Photoactivity Performance of TiO2/cellulose and ZnO/polystyrene; Intensified Effect of Oxidants on Degradation Efficiency of Acetaminophen

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2021-09-01 DOI:10.22036/PCR.2020.243655.1810

Ikram Rouibah, Sarra Hakimi, N. Khellaf, H. Mansour, A. A. Assadi

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Abstract

The photoactivity of TiO2 and ZnO deposited on cellulose and polystyrene was investigated. The synthesized catalysts were characterized by SEM, XRD, and FT-IR. The X-rays diffraction pattern showed that the TiO2 materials were mainly composed of anatase phase with a small amount of rutile phase. Peaks found for ZnO are assigned to well crystallized ZnO oxides. The SEM images confirmed the dispersion of TiO2 particles and ZnO nanofibers on cellulose and polystyrene, respectively. The photoactivity of the two catalysts was tested for the degradation of acetaminophen. Results showed that for an initial drug concentration of 10 mg/L, the removal of the pollutant under UV light in the presence of TiO2/cellulose reached 80%. Under the same conditions, ZnO/polystyrene was inactive under UV, visible and solar radiations. The study of the effect of H2O2 and K2S2O8 as oxidants showed that the peroxydisulfate (S2O82-) exhibited an intensified effect on degradation efficiency of the pollutant; in fact, in the presence of TiO2/cellulose and ZnO/polystyrene, respectively 85.4 and 93.1% of acetaminophen was removed from the contaminated solutions after adding 1mmol/L of S2O82-. The present findings reveal that under UV light, the photocatalytic systems TiO2-K2S2O8/cellulose and ZnO-K2S2O8/polystyrene show promising results for treating effluents charged with acetaminophen.

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TiO2/纤维素和ZnO/聚苯乙烯的光活性研究氧化剂对对乙酰氨基酚降解效率的强化作用

研究了TiO2和ZnO沉积在纤维素和聚苯乙烯上的光活性。采用SEM、XRD和FT-IR对合成的催化剂进行了表征。x射线衍射图表明，TiO2材料主要由锐钛矿相和少量金红石相组成。氧化锌的峰被分配给结晶良好的氧化锌氧化物。SEM图像证实了TiO2颗粒和ZnO纳米纤维分别在纤维素和聚苯乙烯上的分散。考察了两种催化剂降解对乙酰氨基酚的光活性。结果表明，当初始药物浓度为10 mg/L时，TiO2/纤维素存在下紫外光对污染物的去除率达到80%。在相同的条件下，ZnO/聚苯乙烯在紫外、可见光和太阳辐射下均无活性。对H2O2和K2S2O8作为氧化剂的效果研究表明，过硫酸氢盐(S2O82-)对污染物的降解效果增强;事实上，在TiO2/纤维素和ZnO/聚苯乙烯存在的情况下，添加1mmol/L的S2O82-后，对乙酰氨基酚的去除率分别为85.4和93.1%。本研究结果表明，在紫外光下，TiO2-K2S2O8/纤维素和ZnO-K2S2O8/聚苯乙烯光催化体系对含对乙酰氨基酚的废水具有良好的处理效果。

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来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

期刊介绍： The motivation for this new journal is the tremendous increasing of useful articles in the field of Physical Chemistry and the related subjects in recent years, and the need of communication between Physical Chemists, Physicists and Biophysicists. We attempt to establish this fruitful communication and quick publication. High quality original papers in English dealing with experimental, theoretical and applied research related to physics and chemistry are welcomed. This journal accepts your report for publication as a regular article, review, and Letter. Review articles discussing specific areas of physical chemistry of current chemical or physical importance are also published. Subjects of Interest: Thermodynamics, Statistical Mechanics, Statistical Thermodynamics, Molecular Spectroscopy, Quantum Chemistry, Computational Chemistry, Physical Chemistry of Life Sciences, Surface Chemistry, Catalysis, Physical Chemistry of Electrochemistry, Kinetics, Nanochemistry and Nanophysics, Liquid Crystals, Ionic Liquid, Photochemistry, Experimental article of Physical chemistry. Mathematical Chemistry.