首页> 外文期刊>Environmental Engineering Science >Degradation and Mechanism of m-Cresol by Silver Nanoparticles Synthesized Using Night Jasmine (Nyctanthes arbor-tristis) Extracts Through Ultrasonic-Assisted Approach
【24h】

Degradation and Mechanism of m-Cresol by Silver Nanoparticles Synthesized Using Night Jasmine (Nyctanthes arbor-tristis) Extracts Through Ultrasonic-Assisted Approach

机译:超声波辅助法合成夜茉莉提取物合成的银纳米粒子降解间甲酚的机理

获取原文
获取原文并翻译 | 示例
       

摘要

Because of it high solubility in water, m-cresol is an important class of water contaminants. Due to toxicity effects and endocrine disrupting properties of this phenolic compound, removal of it from water and wastewater has gained much attention. In the present work, m-cresol degradation has been studied in aqueous medium using silver nanoparticles (Ag NPs) synthesized using leaf extract of Nyctanthes arbor-tristis. N. arbor-tristis leaf extract was used as the reducing agent in fabrication of Ag NPs in different solvents (water, ethylene glycol, and ethyl acetate) using ultrasonic-assisted method. Ag NP prepared in different solvent shows different shape and size. Ag NPs prepared in water medium show different shape-triangular and spherical. Ag NPs tailored in ethylene glycol and ethyl acetate medium show spherical and elongated shape with different sizes. Particles as such prepared have diverse pioneer catalytic activities toward degradation of m-cresol. Ag NP prepared in water medium completely degrades m-cresol in 93 min, while Ag prepared in ethylene glycol and ethyl acetate medium took a longer time. Degradation process followed first order kinetics with rate constant value in the following order-k(Ag water) > k(Ag ethylene glycol) > k(Ag ethyl acetate). Superior catalytic efficacy of Ag fabricated in water is attributed to the synergetic effect of facet shape, exposing a highly active face and the size dependent surface activity of particles.
机译:由于间甲酚在水中的溶解度高,因此它是一类重要的水污染物。由于该酚类化合物的毒性作用和破坏内分泌的特性,将其从水和废水中去除已引起广泛关注。在目前的工作中,已经研究了使用银纳米颗粒(Ag NPs)在水介质中降解间甲酚的性能,银纳米颗粒是用夜蛾(Nyctanthes arbor-tristis)的叶提取物合成的。使用超声波辅助方法,将乔木-tristis叶提取物用作还原剂,用于在不同溶剂(水,乙二醇和乙酸乙酯)中制备Ag NP。在不同溶剂中制备的Ag NP表现出不同的形状和大小。在水介质中制备的Ag NPs显示不同的形状,三角形和球形。在乙二醇和乙酸乙酯介质中定制的Ag NP呈球形和细长形,大小不同。如此制备的颗粒具有对间甲酚降解的多种先驱催化活性。在水介质中制备的Ag NP在93分钟内完全降解间甲酚,而在乙二醇和乙酸乙酯介质中制备的Ag需要更长的时间。降解过程遵循一级动力学,速率常数为以下顺序:k(Ag水)> k(Ag乙二醇)> k(Ag乙酸乙酯)。在水中制备的银具有出色的催化功效,这归因于小面形状的协同效应,可暴露出高活性面和颗粒的尺寸依赖性表面活性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号