Preparation and characterization of a novel nanocomposite coating based on sol-gel titania/hydroxyapatite for solid-phase microextraction
Preparation and characterization of a novel nanocomposite coating based on sol-gel titania/hydroxyapatite for solid-phase microextraction
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DOI：
10.1016/j.microc.2018.12.012
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发表时间：
2019-03-01
影响因子：
4.8
通讯作者：
Mollahosseini, Afsaneh
中科院分区：
文献类型：
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作者：
Rahmani, Fereidoon;Es-Haghi, Ali;Mollahosseini, Afsaneh
在这项工作中，一种新型的纳米复合涂层具有高的热稳定性和高耐久性的制备。不锈钢作为载体的表面最初由（3-巯丙基）三甲氧基硅烷改性。利用能谱仪（EDX）和场发射扫描电镜（FESEM）对纯TiO 2、纯羟基磷灰石（HAP）和HAP/TiO 2纳米复合涂层的表面特征进行了研究和比较。讨论了各组分之间的相互影响。在纯TiO 2溶胶中加入HAP溶胶，涂层形貌发生了显著变化。考察了溶胶-凝胶HAP/TiO 2纤维用于顶空固相微萃取（HS-SPME）和气相色谱-质谱（GC-MS）联用分析水中苯、甲苯、二甲苯和二甲苯的适用性。研究了影响萃取效率的重要参数。HAP/TiO 2纳米复合涂层的效率与其他报道的纤维进行了比较，并显示出非常好的结果。在最佳条件下，检测限（S/N = 3）的范围为0.04至1 μ g L-1，和定量限（S/N = 10）为0.1和4 μ g L-1之间。每种纤维的相对标准偏差（RSD）（在20 μ g L-1和n = 5）在1.76至8.18%的范围内，而纤维之间的RSD为3.03至10.02%。该方法在0.1 ~ 1000 μ g L-1范围内线性关系良好，相关系数> 0.995。
In this work a novel nanocomposite coating with high thermal stability and high durability is prepared. The surface of the stainless steel as a support was initially modified by (3-mercaptopropyl)trimethoxysilane. Surface characteristics of pure titania (TiO2), pure hydroxyapatite (HAP) and Hap/TiO2 nanocomposite coating were investigated and compared by energy dispersive X-ray (EDX) spectroscopy as well as by field emission-scanning electron microscopy (FESEM). The mutual effects of components on each other were discussed. Addition of HAP sol to the pure TiO2 sol, considerably changes the coating morphology. The applicability of the sol-gel HAP/TiO2 fiber was assessed for the headspace solid-phase microextraction (HS-SPME) of benzene, toluene, ethylbenzene and xylenes (BTEXs) from water sample followed by gas chromatography-mass spectrometry (GC-MS). Important parameters affecting the extraction efficiency were investigated. The efficiency of HAP/TiO2 nano-composite coating was compared with other reported fibers and showed very good results. Under optimal conditions, the detection limits (S/N = 3) were in the range of 0.04 to 1 mu g L-1, and the limits of quantification (S/N = 10) were between 0.1 and 4 mu g L-1. The relative standard deviations (RSDs) for each fiber (at 20 mu g L-1 and n = 5) were in the range of 1.76 to 8.18%, while the RSDs between fibers were 3.03 to 10.02%. The method showed a large linearity in the range from 0.1 to 1000 mu g L-1 with correlation coefficients of > 0.995.