Use of Polyaniline Coating on Magnetic MoO3 and its Effects on Material Stability and Visible-Light Photocatalysis of Tetracycline
Use of Polyaniline Coating on Magnetic MoO3 and its Effects on Material Stability and Visible-Light Photocatalysis of Tetracycline
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DOI：
10.1016/j.jece.2022.107635
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发表时间：
2022-03
影响因子：
7.7
通讯作者：
S. Fanourakis;Sharona Q. Barroga;R. Mathew;J. Peña-Bahamonde;Stacey M. Louie;Jem Valerie D. Perez;
中科院分区：
文献类型：
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作者：
S. Fanourakis;Sharona Q. Barroga;R. Mathew;J. Peña-Bahamonde;Stacey M. Louie;Jem Valerie D. Perez;
合成了一种具有光降解性能和低溶解度的半导体材料（聚苯胺包覆的磁性MoO 3），并在四环素（TC）的降解中进行了评估，以解决水系统中抗生素日益增加的问题。聚苯胺（PANI）提供了一个保护涂层，显着减少MoO 3溶解在很宽的pH值范围内，而Fe 3 O 4核心促进光催化剂从水中提取。未包覆的MoO3@Fe3O4溶解随pH的增加而显著增加（溶解的Mo百分比在pH 3时为2.9%，在pH 10时为22.9%）。在PANI涂层的情况下，溶解在pH 3下降低至1.6%，在pH 10下降低至5.6%。在最佳条件下，PANI@MoO3@Fe3O4对TC的去除率在可见光下为8.2mg/g，在黑暗中为6.5mg/g。PANI@MoO3@Fe3O4光生空穴（h+）氧化水产生的活性物种促进了其对TC的降解. PANI@MoO3@Fe3O4作为光催化剂降解药物污染物的初步评估表明，PANI@MoO3@Fe3O4是一种有前途的材料，可用于更广泛的环境应用。
A semiconducting material (polyaniline-coated magnetic MoO3) with photodegradative properties and low solubility was synthesized and assessed in the degradation of tetracycline (TC) to address the rising concern of antibiotics in water systems. Polyaniline (PANI) provided a protective coating, significantly reducing MoO3dissolution across a wide pH range, while the Fe3O4core facilitated photocatalyst extraction from water. Uncoated MoO3@Fe3O4dissolution significantly increased with increasing pH (dissolved Mo percentage of 2.9% at pH 3 and 22.9% at pH 10). With the PANI coating, dissolution was reduced to 1.6% at pH 3 and 5.6% at pH 10. The TC removal by PANI@MoO3@Fe3O4was 8.2 mg TC/g photocatalyst in visible light and 6.5 mg/g in dark within 35 min under optimum conditions. The degradative properties of PANI@MoO3@Fe3O4toward TC were facilitated by reactive species produced from water oxidation by photogenerated holes (h+). This initial assessment of PANI@MoO3@Fe3O4as a photocatalyst for pharmaceutical contaminant degradation indicates PANI@MoO3@Fe3O4is a promising material useful for wider environmental applications.