使用掺钕的硒化铅纳米粒子的磺胺类药物声催化。
Sonocatalysis of a sulfa drug using neodymium-doped lead selenide nanoparticles.
机构信息
Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran.
Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran.
出版信息
Ultrason Sonochem. 2015 Nov;27:345-358. doi: 10.1016/j.ultsonch.2015.05.042. Epub 2015 Jun 3.
Undoped and Nd-doped PbSe nanoparticles with different Nd contents were successfully synthesized using a simple hydrothermal method. The prepared nanoparticles were thoroughly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) techniques. Catalytic efficiency of undoped and Nd-doped PbSe samples was evaluated by monitoring the removal of sulfasalazine (SSZ) in aqueous solution under ultrasonic irradiations (sonocatalytic removal process). It was found that the presence of the K2S2O8 accelerated the sonocatalytic removal of SSZ, but the presence of NaF, Na2SO4, NaCl, and NaHCO3 obstructed it. The removal efficiency of 30.24% for PbSe and 86% for 12% Nd-doped PbSe was achieved at 90 min of reaction time, in the presence of peroxydisulfate. Also, the effect of operational parameters on the sonocatalytic removal efficiency and the dominant sonocatalytic removal mechanism were completely examined. It was found that removal of SSZ by sonocatalytic process was completed by the action of reactive oxygen species (ROS) rather than pyrolysis. An ecotoxicological test using an aquatic plant Lemna minor (L. minor) confirmed the negligible toxicity of the synthesized samples, which makes these nanoparticles appropriate for use as a sonocatalyst.
采用简单的水热法成功合成了不同钕含量的未掺杂和 Nd 掺杂 PbSe 纳米粒子。通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和 X 射线光电子能谱（XPS）技术对制备的纳米粒子进行了彻底的表征。通过监测超声辐射下（声催化去除过程）水溶液中磺胺嘧啶（SSZ）的去除情况，评估了未掺杂和 Nd 掺杂 PbSe 样品的催化效率。结果发现，K2S2O8 的存在加速了 SSZ 的声催化去除，但 NaF、Na2SO4、NaCl 和 NaHCO3 的存在则阻碍了其去除。在过二硫酸盐存在下，反应时间为 90 分钟时，PbSe 的去除效率为 30.24%，12%Nd 掺杂 PbSe 的去除效率为 86%。此外，还全面研究了操作参数对声催化去除效率的影响和主要的声催化去除机制。结果发现，声催化过程中 SSZ 的去除是通过活性氧物质（ROS）的作用而不是热解完成的。使用水生植物浮萍（L. minor）进行的生态毒理学测试证实了合成样品的毒性可以忽略不计，这使得这些纳米粒子适合用作声催化剂。
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