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首页> 外文期刊>Journal of Hazardous Materials >Photocatalytic degradation of trimethoprim by metallic nanoparticles supported on TiO_2-P25
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Photocatalytic degradation of trimethoprim by metallic nanoparticles supported on TiO_2-P25

机译：负载在TiO_2-P25上的金属纳米粒子对甲氧苄啶的光催化降解

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摘要

The effect of Au, Ag, Cu and Ni nanoparticles deposited on TiO_2 -P25 was studied on the photodegradation of trimethoprim, a commonly used antibiotic. The synthesized materials were characterized by ICP, EDS, XRD, BET, UV-vis, TEM and TPR. The metal loading was 0.5 wt.% and the average particle size was about 2 nm in all the studied samples. The deposition of metallic particles on TiO_2-P25 produces an enhancement of the activity of the bare semiconductor; when the degradation of trimethoprim was carried out by pure TiO_2-P25, the mineralization reached only 50% of the organic matter, while by using metallic nanoparticles deposited on TiO_2-P25, the mineralization of organic matter increased up to 80% for the same reaction conditions and reaction time. The evaluation of the photocatalytic activity was made for solutions containing trimethoprim in concentrations of 40 ppm under UV light irradiation using a lamp with primary emission at 254 nm and 2.2 mW/cm~2. It is shown that the ability of the photocatalyst to mineralize trimethoprim depends on the electron affinity and the electronegativity of the deposited metal.
机译：研究了沉积在TiO_2-P25上的金，银，铜和镍纳米粒子对常用抗生素甲氧苄啶光降解的影响。通过ICP，EDS，XRD，BET，UV-vis，TEM和TPR对合成材料进行了表征。在所有研究的样品中，金属负载量为0.5重量％，平均粒径为约2nm。金属颗粒在TiO_2-P25上的沉积会增强裸露半导体的活性；当纯TiO_2-P25降解甲氧苄啶时，矿化仅达到有机物的50％，而通过沉积在TiO_2-P25上的金属纳米颗粒，同一反应中有机物的矿化增加至80％。条件和反应时间。使用在254nm和2.2mW / cm〜2的一次发射的灯在紫外光照射下对浓度为40ppm的甲氧苄啶的溶液进行光催化活性的评估。结果表明，光催化剂矿化甲氧苄啶的能力取决于沉积金属的电子亲和力和电负性。

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  • 来源
    《Journal of Hazardous Materials》 |2013年第1期|28-35|共8页
  • 作者

    Socorro Oros-Ruiz; Rodolfo Zanella; Blanca Prado;

  • 作者单位

    Centra de Ciencias Aplicadas y Desarrollo Tecnoldgico, Universidad National Autonoma de Mexico, Circuito Exterior S/N, Ciudad Universitaria, A.P. 70-186, Delegation Coyoacan, C.P. 04510 Mexico, DF, Mexico;

    Centra de Ciencias Aplicadas y Desarrollo Tecnoldgico, Universidad National Autonoma de Mexico, Circuito Exterior S/N, Ciudad Universitaria, A.P. 70-186, Delegation Coyoacan, C.P. 04510 Mexico, DF, Mexico;

    Institute de Ceologia, Universidad National Autonoma de Mexico, Ciudad Universitaria, 04510 Mexico, DF, Mexico;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Trimethoprim; Photocatalysis; Gold; Silver; TiO_2;

    机译：甲氧苄啶;光催化;金;银;TiO_2;

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