纳米线组装叶片状三氧化钼的合成及其对三乙胺的气敏性能
Synthesis and Triethylamine Sensing Performance of Nanowires Assembled Leaf-like MoO3 Nanostructure
作者单位E-mail
田文迪 河南理工大学化学化工学院, 焦作 454000  
栗肖泽 河南理工大学化学化工学院, 焦作 454000  
曹建亮 河南理工大学化学化工学院, 焦作 454000  
王燕 河南理工大学安全科学与工程学院, 煤炭安全生产与清洁高效利用省部共建协同创新中心, 焦作 454000 yanwang@hpu.edu.cn 
摘要: 通过溶剂热法制备了由一维纳米线自组装的叶状三氧化钼纳米材料,借助X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)、高分辨透射电镜(HRTEM)、紫外-可见漫反射光谱(UV-Vis DRS)、热重-示差扫描量热(TG-DSC)、氮气吸附(N2-sorption)等技术对材料进行了系统的组成和结构表征。结果表明,一维纳米线表面具有粗糙结构,且由一维纳米线组装的叶片状三氧化钼属畸变八面体中的正交晶系,其主要暴露的结晶面是(021)。此叶片状三氧化钼气敏材料在300℃的最佳工作温度下,对2.25 g·m-3的三乙胺表现出优异的选择性、超高的灵敏度和较快的响应时间(5 s),甚至在浓度为4.5 mg·m-3的检测标准下响应值仍可达到12.4。基于以上结构表征和性能测试结果,对叶片状三氧化钼的形成及三乙胺敏感机理进行了初步探讨分析。
关键词: 叶片状三氧化钼  纳米结构  气敏材料  三乙胺  快速检测
基金项目: 国家自然科学基金(No.U1704255)、河南省高校科技创新人才支持计划(No.19HASTIT042)和河南理工大学创新型科研团队(No.T2018-2,T2019-1)资助
Abstract: A multichip leaf-like MoO3 nanostructure assembled from one-dimensional nanowires has been synthesized by a simple solvothermal method using bis(acetylacetonato) dioxomolybdenum (Ⅵ) in a component solvent of acetic acid and deionized water at relatively lower temperature of 150℃. The field emission scanning electron microscopic (FESEM) and transmission electron microscopy (TEM) observations indicate that the multichip MoO3 nanostructures are composed of a plurality of fine nanowires with rough surface. The X-ray powder diffraction (XRD), high-resolution transmission electron microscope (HRTEM) results signified that the MoO3 nanoleaves with the orthorhombic system, a distorted octahedral structure. And, the dominant exposed crystal plane of the leaf-like MoO3 was (021). In addition, the leaf-like MoO3 possessed distinctive selectivity, ultrahigh sensitivity and response time (~5 s) towards 2.25 g·m-3 triethylamine (TEA) at the operating temperature of 300℃, even attained 12.4 at the low detection level (4.5 mg·m-3). Based on the analysis results, the growth and formation of crystalline phase was deemed to follow the oriented attachment mechanism. Accordingly, the enhanced sensing ability could be mainly ascribed to its unique nanostructure, linear combination of large density, and high specific surface area, which promote the substantial free diffusion of TEA gases into the blade hole, showing excellent response recovery.
Keywords: leaf-like MoO3  nanostructure  gas sensing material  triethylamine  fast detection
投稿时间:2020-03-11 修订日期:2020-06-22
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田文迪,栗肖泽,曹建亮,王燕.纳米线组装叶片状三氧化钼的合成及其对三乙胺的气敏性能[J].无机化学学报,2020,36(10):1948-1958.
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