Enhanced formaldehyde sensing performance of 3D hierarchical porous structure Pt-functionalized NiO via a facile solution combustion synthesis
Enhanced formaldehyde sensing performance of 3D hierarchical porous structure Pt-functionalized NiO via a facile solution combustion synthesis
复制标题
通过简单的溶液燃烧合成增强 3D 分层多孔结构 Pt 功能化 NiO 的甲醛传感性能
DOI：
10.1016/j.snb.2015.05.056
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发表时间：
2015-12-01
影响因子：
8.4
通讯作者：
Wang, Yude
中科院分区：
文献类型：
--
作者：
Dong, Chengjun;Li, Qing;Wang, Yude
报道了用于制备原始NiO和Pt官能化（0.5%、1%和2%Pt负载）NiO的表面溶液燃烧合成。结果发现，所获得的产品表现出三维层次的多孔结构，无论Pt负载量由于气体的释放和松散堆积的NiO颗粒。与原始NiO相比，Pt纳米颗粒的存在在某种程度上影响了NiO在这些相对较大的NiO纳米颗粒周围和嵌入这些不同尺寸的NiO纳米颗粒上的生长行为。Pt功能化的NiO基气体传感器显示出较低的工作温度和显着增强的响应甲醛，特别是1%的Pt负载的NiO。负载1%Pt的NiO基气体传感器在200 ℃下显示出9.90至2000 ppm甲醛的响应值，而原始NiO基气体传感器在相同条件下仅显示出3.15的响应。Pt功能化的NiO基气敏元件提高气敏性能的合理解释是由于Pt对甲醛的催化氧化作用和氧物种数量的增加。(C)2015 Elsevier B.V.版权所有。
A facial solution combustion synthesis is reported for preparing pristine NiO and Pt-functionalized (0.5%, 1%, and 2% Pt loading) NiO. It was found that the obtained products exhibit 3D hierarchical porous structure regardless the Pt-loaded amounts due to the release of gases and the loosely packed NiO particles. Compared with the pristine NiO, the presence of Pt nanoparticles somehow affected the growth behavior of NiO around and embedded on these relatively big NiO nanoparticles in different size. The Ptfunctionalized NiO based gas sensor showed lower operating temperature and substantially enhanced responses to formaldehyde, especially 1% Pt-loaded NiO. The 1% Pt-loaded NiO based gas sensor displayed a response value of 9.90 to 2000 ppm formaldehyde at 200 degrees C, whereas the pristine NiO based gas sensor only showed a response of 3.15 under the same conditions. The plausible explanation for the Pt-functionalized NiO based gas sensors to enhance the gas sensing performance is attributed to the role of Pt on the catalytic oxidation of formaldehyde and the increase of oxygen species quantity. (C) 2015 Elsevier B.V. All rights reserved.