Incorporation of carbon nanotubes into graphene for highly efficient solid-phase microextraction of benzene homologues

由 ty10086 提交于 周四, 08/26/2021 - 13:18
文章英文标题
Incorporation of carbon nanotubes into graphene for highly efficient solid-phase microextraction of benzene homologues
正文
Abstract(#br)3D graphene-carbon nanotubes (G-CNTs) composite with unique morphology and structure was prepared by one-step insertion of CNTs into graphene. Subsequently, the G-CNTs composite as a fiber coating material for solid-phase microextraction (SPME) was fabricated on the surface of a stainless steel wire by direct coating method. The prepared coating was tested by the extraction of benzene homologues (BTEX, benzene, toluene, ethylbenzene and m-xylene). Compared with a commercial polydimethylsiloxane (PDMS) fiber, the home-made coating exhibited higher extraction performance for BTEX, and the reasons were discussed systematically. Under the optimized conditions, the prepared coating coupled with chromatography-mass spectrometry (GC–MS) for the analysis of BTEX exhibited wide linear ranges, low limits of detection (3\u003cce:hsp sp=\"0.25\"/\u003eS/N) (LODs, 0.59–2.68\u003cce:hsp sp=\"0.25\"/\u003eng\u003cce:hsp sp=\"0.25\"/\u003eL −1 ), low limits of quantification (10\u003cce:hsp sp=\"0.25\"/\u003eS/N) (LOQs, 1.96–8.92\u003cce:hsp sp=\"0.25\"/\u003eng\u003cce:hsp sp=\"0.25\"/\u003eL −1 ), good repeatability (3.2–5.5%, n\u003cce:hsp sp=\"0.25\"/\u003e=\u003cce:hsp sp=\"0.25\"/\u003e6) and reproducibility (3.7–9.1%, n\u003cce:hsp sp=\"0.25\"/\u003e=\u003cce:hsp sp=\"0.25\"/\u003e3). Finally, the developed method was successfully applied to the analysis of BTEX in environmental water samples with satisfactory recoveries (84.7–108.1%). This study is expected to further the exploration of high-performance SPME coating materials, and broaden the applications of graphene-based materials.
文章内容（英文）
Abstract(#br)3D graphene-carbon nanotubes (G-CNTs) composite with unique morphology and structure was prepared by one-step insertion of CNTs into graphene. Subsequently, the G-CNTs composite as a fiber coating material for solid-phase microextraction (SPME) was fabricated on the surface of a stainless steel wire by direct coating method. The prepared coating was tested by the extraction of benzene homologues (BTEX, benzene, toluene, ethylbenzene and m-xylene). Compared with a commercial polydimethylsiloxane (PDMS) fiber, the home-made coating exhibited higher extraction performance for BTEX, and the reasons were discussed systematically. Under the optimized conditions, the prepared coating coupled with chromatography-mass spectrometry (GC–MS) for the analysis of BTEX exhibited wide linear ranges, low limits of detection (3\u003cce:hsp sp=\"0.25\"/\u003eS/N) (LODs, 0.59–2.68\u003cce:hsp sp=\"0.25\"/\u003eng\u003cce:hsp sp=\"0.25\"/\u003eL −1 ), low limits of quantification (10\u003cce:hsp sp=\"0.25\"/\u003eS/N) (LOQs, 1.96–8.92\u003cce:hsp sp=\"0.25\"/\u003eng\u003cce:hsp sp=\"0.25\"/\u003eL −1 ), good repeatability (3.2–5.5%, n\u003cce:hsp sp=\"0.25\"/\u003e=\u003cce:hsp sp=\"0.25\"/\u003e6) and reproducibility (3.7–9.1%, n\u003cce:hsp sp=\"0.25\"/\u003e=\u003cce:hsp sp=\"0.25\"/\u003e3). Finally, the developed method was successfully applied to the analysis of BTEX in environmental water samples with satisfactory recoveries (84.7–108.1%). This study is expected to further the exploration of high-performance SPME coating materials, and broaden the applications of graphene-based materials.
来源出处
Journal|[J]Microchemical JournalVolume 139, 2018. PP 203-209
DOI
https://doi.org/10.1016/j.microc.2018.02.032

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此链接为PDMS-微流控芯片/PDMS/道康宁SYLGARD184/小桶0.5KG装的链接。

一般性的产品性能参数表参考以下小桶装的参数：

微流控芯片/PDMS/道康宁SYLGARD184；微流控芯片/PDMS/道康宁SYLGARD184；微流控芯片/PDMS/道康宁SYLGARD184；

品牌型号：道康宁SYLGARD184

包装规格：0.5KG/罐[含有45.4g固化剂，总重量为0.5KG]

产品颜色：保质期限：36个月

存放环境说明：室温,阴凉处保存

备注说明：

美国道康宁道康宁SYLGARD 184硅橡胶是由液体组分组成的双组分套件产品，包括基本组分与固化剂。基本组分与固化剂按10:1重量比完全混合，中等粘度混合液的稠度与SAE 40机油相似。无论厚薄，混合液将固化成为具有韧性的透明弹性体，最适用于电子／电气方面的封装与灌封应用。 道康宁SYLGARD 184硅橡胶在25~150℃的温度范围内固化，无放热现象，无需二次固化。固化过程完成后，可立即在-55~200℃的温度范围内使用。 产品特性：低毒性，在常规的工业操作中，无特别的注意事项； 无溶剂或固化副产物， 固化时不放热；无需特殊的通风条件，不会产生腐蚀；固化时，收缩量小； 固化后， 透明具有弹性；抗震与减缓机械震动；振动的传递性能小；元件可裸视检查与易修补性； 环保性能；低吸水性，良好的耐辐射性能；高真空状态下的低漏气性； 优异的电性能；较大温度范围内的稳定性， 抗解聚；在-55~200℃范围内，甚至在密闭状态下保持弹性与柔韧性，性能稳定； 阻燃性，UL可燃性分级为94 V-1，温度等级：130℃ 产品用途： 道康宁SYLGARD 184硅橡胶在电气／电子的封装与灌封方面有广泛的应用。