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Fabrication of direct Z-scheme Co_3O_4/BiOI for ibuprofen and trimethoprim degradation under visible light irradiation

机译:在可见光照射下,制备用于布洛芬的直接Z-SchemeCO_3O_4 / BIOI,并在可见光照射下的甲基吡啶降解

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摘要

The escalation of pharmaceutical products development and sales in the last few decades have raised concerns about their effect on the environment, particularly water and consequently their removal from wastewater. Composites of cobalt oxide (Co3O4) and bismuth oxyiodide (BiOI) were synthesised and evaluated for degradation of ibuprofen (IBU) and effect of trimethoprim (TMP) under visible light irradiation. The properties of the as synthesised composites were evaluated using different techniques such as FTIR, SEM, TEM, XRD, BET, TGA, UV-Vis and PL. The self-assembled direct Z-scheme heterojunction showed high photocatalytic activity for degradation of ibuprofen (97.02%) after adding 2 mg of TMP. TOC reduction of 85.68 +/- 2.22% at pH 11.3 was also calculated. The enhanced photocatalytic activity of the Z-scheme heterojunction was attributed to strong visible light absorption properties of the catalyst and improved separation of photoexcited charge carriers resulting from the built-in electric field formed between the BiOI microspheres and the Co3O4 wormy epitaxy established after equilibrium Fermi level was reached. The Z-scheme heterojunction is a promising material for the removal of pharmaceuticals in aquatic effluents.
机译:在过去的几十年中制药产品的升级和销售促销对其对环境影响的影响,特别是水,因此它们从废水中去除。合成并评价氧化钴(CO3O4)和铋氧氧化碘化物(BioI铋)的复合材料,并在可见光照射下降解吡啶甲苯(IBU)和Trimethoprim(TMP)的作用。使用不同的技术(如FTIR,SEM,TEM,XRD,BET,TGA,UV-VIS和PL)评估作为合成复合材料的性质。自组装的直接Z方案异质结显示出在加入2mg TMP后的布洛芬(97.02%)的高光催化活性。还计算了PH 11.3的TOC减少85.68 +/- 2.22%。 Z形方向的增强的光催化活性归因于催化剂的强可见光吸收性能,并改善了由Bioi Microshess和Co3O4毒性外延之间形成的内置电场产生的光屏蔽电荷载流子的分离,并在平衡费米后建立达到水平。 Z形方案异质结是一种有希望的材料,用于去除水生污水中的药物。

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  • 来源
    《Applied Surface Science》 |2020年第1期|145940.1-145940.16|共16页
  • 作者单位

    Univ South Africa Coll Sci Engn & Technol Nanotechnol & Water Sustainabil Res Unit ZA-1709 Florida South Africa;

    Univ South Africa Coll Sci Engn & Technol Nanotechnol & Water Sustainabil Res Unit ZA-1709 Florida South Africa;

    Univ South Africa Coll Sci Engn & Technol Nanotechnol & Water Sustainabil Res Unit ZA-1709 Florida South Africa;

    Univ South Africa Coll Sci Engn & Technol Nanotechnol & Water Sustainabil Res Unit ZA-1709 Florida South Africa;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Co3O4/BiOI composite; Photocatalytic degradation; Ibuprofen; Z-scheme; Visible light;

    机译:CO3O4 / BIOI复合材料;光催化降解;布洛芬;Z-Scheme;可见光;

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