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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Enhanced H2S gas-sensing performance of alpha-Fe2O3 nanofibers by optimizing process conditions and loading with reduced graphene oxide
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Enhanced H2S gas-sensing performance of alpha-Fe2O3 nanofibers by optimizing process conditions and loading with reduced graphene oxide

机译：通过优化工艺条件和用载氧化物氧化物加载，增强了H2S气体感应性能的α-Fe2O3纳米纤维的性能

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摘要

We systematically investigated the effects of process conditions and reduced graphene oxide (RGO) loading on the H2S gas-sensing performance of the alpha-Fe2O3 nanofibers (NFs) fabricated via on-chip electrospinning. The annealing temperature and precursor solution contents strongly influenced on the morphology and structure of the alpha-Fe2O3 NFs that accordingly affected on the gas-sensing performance. The optimum process conditions with the annealing temperature of 600 degrees C and the precursor solution contents of 11 wt% PVA and 4.0 wt% Fe(NO3)(3)center dot 9H(2)O led to the alpha-Fe2O3 NF sensors having a high response of similar to 6.1 at 1 ppm H2S gas. The RGO loading further improved the gas response, increasing the response to 1 ppm H2S gas up to similar to 9.2. Also, the RGO-loaded alpha-Fe2O3 NF sensors enhanced their selectivity and detection limit as compared with pure alpha-Fe2O3 NF sensors. The enhanced gas-sensing performance was attributed to the presence of nanograins, the increase of surface-to-volume ratio and the formation of potential barriers at nanograin homojunctions and RGO/alpha-Fe2O3 heterojunctions. (C) 2020 Elsevier B.V. All rights reserved.
机译：我们系统地研究关于该α-氧化铁纳米纤维（NFS）经由芯片上电纺丝制造的H 2 S气体感测性能的工艺条件和还原的石墨烯氧化物（RGO）加载的影响。退火温度和前体溶液的内容对相应受到影响在气体感测性能的阿尔法-Fe2O3的会员协会的形态和结构的强烈影响。随着退火温度的600摄氏度和11％（重量）PVA的前体溶液的内容和4.0重量％的Fe（NO 3）的最佳工艺条件（3）中心的点9H（2）O导致的α-氧化铁NF传感器具有为1ppm H 2 S气体的类似6.1高的响应。所述RGO装载进一步提高气体反应，增加至9.2的响应至1ppm的H 2 S气体达类似。此外，RGO加载的α-Fe2O3的NF传感器增强它们的选择性和检测极限与纯α--Fe2O3的NF传感器相比。增强的气体感测性能归因于纳米晶粒的存在，表面与体积比的增加和势垒在纳米晶粒同质结和RGO /α-Fe2O3的异质结的形成。 （c）2020 Elsevier B.v.保留所有权利。

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