Synthesis of surfactant-coated cobalt ferrite nanoparticles for adsorptive removal of acid blue 45 dye
Synthesis of surfactant-coated cobalt ferrite nanoparticles for adsorptive removal of acid blue 45 dye
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DOI：
10.1088/2053-1591/aab6a4
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发表时间：
2018-03-01
影响因子：
2.3
通讯作者：
Ullah, Zaka
中科院分区：
文献类型：
--
作者：
Mushtaq, Muhammad Waheed;Kanwal, Farah;Ullah, Zaka
以金属氯化物为前驱体，氢氧化钾为沉淀剂，采用湿化学共沉淀法制备了钴铁氧体（CoFe 2 O 4）纳米粒子。以Tergitol-1x（T-1x）和DDAB为封端剂，研究了封端剂对钴铁氧体纳米粒子（CFNPs）粒径、粒径分布和形貌的影响。傅里叶变换红外光谱证实了碳纳米管的合成和金属-氧（M-O）键的形成。采用x射线衍射、扫描电子显微镜、动态光散射和振动样品磁强计分别研究了铁氧体纳米粒子的尖晶石相结构、形貌、多分散性和磁性能。通过动态光散射和原子力显微镜研究发现，添加封端剂会影响CFNPs的二次生长，并减小其粒径。结果表明，DDAB是一种更有前途的表面活性剂，可以控制CFNPs的粒径（约13 nm）、多分散性和聚集性。将合成的CFNPs、CFNPs/T-1x和CFNPs/DDAB用于研究它们对酸性蓝45染料的吸附潜力，并且记录了0.1 g CFNPs/DDAB在pH 2.5和温度20下的最大吸附去除率为92.25%。+/-. 1摄氏度。结果表明，磁性纳米粒子对染料的吸附符合Langmuir吸附等温式。
Cobalt ferrite (CoFe2O4) nanoparticles (NPs) are synthesized by wet chemical coprecipitation method using metal chlorides as precursors and potassium hydroxide (KOH) as a precipitant. The tergitol-1x (T-1x) and didecyldimethyl ammonium bromide (DDAB) are used as capping agents and their effect is investigated on particle size, size distribution and morphology of cobalt ferrite nanoparticles (CFNPs). The Fourier transform infrared spectroscopy confirms the synthesis of CFNPs and formation of metal-oxygen (M-O) bond. The spinel phase structure, morphology, polydispersity and magnetic properties of ferrite nanoparticles are investigated by x-ray diffraction, scanning electron microscopy, dynamic light scattering and vibrating sample magnetometry analyses, respectively. The addition of capping agents effects the secondary growth of CFNPs and reduces their particle size, as is investigated by dynamic light scattering and atomic force microscopy. The results evidence that the DDABis more promising surfactant to control the particle size (similar to 13 nm), polydispersity and aggregation of CFNPs. The synthesized CFNPs, CFNPs/T-1x and CFNPs/DDABare used to study their adsorption potential for removal of acid blue 45 dye, and a maximum adsorptive removal of 92.25% is recorded by 0.1 g of CFNPs/DDABat pH2.5 and temperature 20. +/-. 1 degrees C. The results show that the dye is physically adsorbed by magnetic NPs and follows the Langmuir isotherm model.