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首页> 外文期刊>RSC Advances >A novel ethanol gas sensor based on α-Bi2Mo3O12/Co3O4 nanotube-decorated particles
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A novel ethanol gas sensor based on α-Bi2Mo3O12/Co3O4 nanotube-decorated particles

机译：一种基于α-Bi2Mo3O12 / CO3O4纳米管装饰粒子的新型乙醇气体传感器

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摘要

A novel composite based on α-Bi _(2) Mo _(3) O _(12) /Co _(3) O _(4) nanotube-decorated particles was successfully synthesized using a highly efficient and facile two step system using electrospinning and hydrothermal techniques. The small size Co _(3) O _(4) nanoparticles were uniformly and hydrothermally developed on the electrospun α-Bi _(2) Mo _(3) O _(12) nanotubes. The pure α-Bi _(2) Mo _(3) O _(12) nanofibers and composite based on α-Bi _(2) Mo _(3) O _(12) /Co _(3) O _(4) were examined using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) analyses. From the BET measurements, the composite based on α-Bi _(2) Mo _(3) O _(12) /Co _(3) O _(4) exhibits a large specific surface area of 54 m ~(2) g ~(?1) with mesopore diameter ranges of 2–10 nm, which is mainly attributed to the remarkable and dominant enhancement in gas sensing as compared to that of the pure α-Bi _(2) Mo _(3) O _(12) nanofibers (38 m ~(2) g ~(?1) ) and Co _(3) O _(4) nanoparticles (32 m ~(2) g ~(?1) ), respectively. In this work, the novel composite based on α-Bi _(2) Mo _(3) O _(12) /Co _(3) O _(4) presented a high sensitivity of 30.25 with a quick response/recovery speed towards 100 ppm ethanol at an optimal working temperature of 170 °C, as compared to the pure α-Bi _(2) Mo _(3) O _(12) nanofibers and Co _(3) O _(4) nanoparticles, which display a sensitivity of 13.10 and 2.99 at an optimal working temperature of 220 °C and 280 °C. The sensing performance of the composite based on the α-Bi _(2) Mo _(3) O _(12) /Co _(3) O _(4) sensor exhibits a superior sensing performance towards ethanol, which might be owed to the enormous number of superficial oxygen species, the small size catalytic effect of the Co _(3) O _(4) nanoparticles and the interfacial effect formed between the n-type α-Bi _(2) Mo _(3) O _(12) and p-type Co _(3) O _(4) leading to a high charge carrier concentration. This is a novel investigation of a composite based on an α-Bi _(2) Mo _(3) O _(12) /Co _(3) O _(4) sensor in the gas sensing era, which might be of vital importance in applications in the advanced gas sensing field.
机译：基于α-BI _（2）Mo _（3）O _（3）O _（12）/ CO_（3）O _（4）纳米管装饰颗粒的新型复合材料是使用高效和容易的两个步骤系统成功合成的静电纺丝和水热技术。小尺寸Co _（3）o _（4）纳米颗粒在Electromα-Bi _（2）Mo _（3）Oα（12）纳米管上均匀并均匀地开发。纯α-Bi _（2）Mo _（3）O _（12）纳米纤维和基于α-Bi _（2）Mo _（3）O _（12）/ Co _（3）O _（ 4）使用X射线粉末衍射（XRD），扫描电子显微镜（SEM），能量分散X射线光谱（EDX），透射电子显微镜（TEM），高分辨率透射电子显微镜（HRTEM），X-射线光电子谱（XPS）和Brunauer-Emmett-Teller（Bet）分析。从BET测量，基于α-BI _（2）Mo _（3）O _（12）/ co _（3）O _（4）的复合材料表现出54m〜（2）的大比表面积G〜（α1）具有2-10nm的中孔直径范围，主要归因于纯α-Bi _（2）Mo _（3）O _的气体感测中的显着和显着的增强（12）纳米纤维（38m〜（2）g〜（α1））和CO _（3）oα（4）纳米颗粒（32m〜（2）g〜（α1））。在这项工作中，基于α-Bi _（2）Mo _（3）O _（3）/ co _（3）O _（4）的新型复合材料呈现了30.25的高灵敏度，快速响应/恢复速度与纯α-Bi _（2）Mo _（3）O =（12）纳米纤维和CO _（3）o _（4）纳米颗粒相比，在170℃的最佳工作温度下朝向100ppm乙醇，如纯的α-Bi _（2）Mo _（3）O =（3）α（4）纳米颗粒相比在220°C和280°C的最佳工作温度下显示13.10和2.99的灵敏度。基于α-BI _（2）Mo _（3）O _（3）O _（12）/ CO _（3）O _（4）传感器对乙醇的感测性能提供了较强的感应性能，这可能欠乙醇对于巨大的浅表氧物种，CO _（3）o _（4）纳米颗粒的小尺寸催化作用和在N型α-BI _（2）Mo _（3）O之间形成的界面效果_（12）和p型CO _（3）O _（4）导致高电荷载流量。这是基于α-Bi _（2）Mo _（3）O _（3）O _（12）/ co _（3）O _（4）传感器的基于α-BI _（2）o _（3）传感器，这是一种新的α-bi _（2）/ co _（3）传感器，其可能是在先进气体传感领域的应用中至关重要。

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