Highly sensitive and selective acetone sensing performance of WO3 nanofibers functionalized by Rh2O3 nanoparticles
Highly sensitive and selective acetone sensing performance of WO3 nanofibers functionalized by Rh2O3 nanoparticles
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DOI：
10.1016/j.snb.2015.10.021
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发表时间：
2016-03
影响因子：
8.4
通讯作者：
N. Kim;Seon-Jin Choi;Sang-Joon Kim;Hee-jin Cho;Ji-Soo Jang;Won‐Tae Koo;Moonil Kim;Il‐Doo Kim
中科院分区：
文献类型：
--
作者：
N. Kim;Seon-Jin Choi;Sang-Joon Kim;Hee-jin Cho;Ji-Soo Jang;Won‐Tae Koo;Moonil Kim;Il‐Doo Kim
在这项工作中，催化Rh 2 O3功能化的WO 3纳米纤维（NFs）的合成通过静电纺丝路线，并作为一个高选择性的丙酮传感层的潜在诊断糖尿病。采用多元醇法合成了平均粒径为5.0 ± 0.52 nm的催化铑纳米粒子（Rh NPs），并将其与W前驱体和聚乙烯吡咯烷酮（PVP）一起分散在水中进行静电纺丝。在空气气氛中在600 °C下煅烧初纺Rh NP负载的W前体/PVP复合物NF 1小时以获得Rh 2 O3修饰的WO 3 NF。Rh 2 O3修饰的WO 3 NFs的微结构演变和化学组成作为Rh负载量的函数，即，0.01使用能量色散X射线光谱（EDS）、拉曼光谱、X射线光电子能谱（XPS）、X射线衍射（XRD）和高分辨率透射电子显微镜（HRTEM）来检查0.05wt%、0.10wt%和0.15wt%。Rh 2 O3修饰的WO 3 NFs中WO 3微晶的平均尺寸（30 nm）远小于原始WO 3 NFs中WO 3微晶的平均尺寸（60 nm）。Rh 2 O3修饰的WO 3 NFs显示出优异的丙酮（CH 3COCH 3）传感响应（Rair/Rgas= 41.2至5 ppm），这是在高湿度气氛（95%RH）下原始WO 3 NFs的响应（Rair/Rgas= 9.0至5 ppm）的4.6倍。此外，在其他干扰气体如戊烷（n-C5 H12）、氨（NH3）、甲苯（C6 H5 CH 3）、一氧化碳（CO）和乙醇（C2 H5 OH）中，观察到Rh 2 O3修饰的WO 3 NFs的上级丙酮交叉灵敏度。这些结果对于准确和选择性地检测呼出气中的丙酮以用于潜在的糖尿病诊断是非常有希望的。
In this work, catalytic Rh2O3-functionalized WO3nanofibers (NFs) were synthesized via an electrospinning route and used as a highly selective acetone-sensing layer for potential diagnosis of diabetes. Catalytic rhodium nanoparticles (Rh NPs) with average diameters of 5.0 ± 0.52 nm, which were synthesized by the polyol process, were dispersed in water with W precursor and poly(vinylpyrrolidone) (PVP) for electrospinning. As-spun Rh NP-loaded W precursor/PVP composite NFs were calcined at 600 °C for 1 h in air atmosphere to achieve Rh2O3-decorated WO3NFs. Microstructure evolution and chemical composition of Rh2O3-decorated WO3NFs as a function of Rh-loading amounts, i.e., 0.01 wt%, 0.05 wt%, 0.10 wt%, and 0.15 wt%, were examined using energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and high-resolution transmission electron microscopy (HRTEM). The mean size (30 nm) of the WO3crystallites in Rh2O3-decorated WO3NFs was much smaller than that (60 nm) of the WO3crystallites in pristine WO3NFs. The Rh2O3-decorated WO3NFs showed outstanding acetone (CH3COCH3) sensing response (Rair/Rgas= 41.2 to 5 ppm), which was 4.6 times higher than the response (Rair/Rgas= 9.0 to 5 ppm) of pristine WO3NFs at highly humid atmosphere (95% RH). In addition, superior acetone cross-sensitivity of the Rh2O3-decorated WO3NFs was observed in other interfering gases such as pentane (n-C5H12), ammonia (NH3), toluene (C6H5CH3), carbon monoxide (CO), and ethanol (C2H5OH) at 5 ppm. These results are highly promising for the accurate and selective detection of acetone in exhaled breath for potential diagnosis of diabetes.