Synthesis and triethylamine sensing properties of mesoporous α-Fe2O3 microrods
Synthesis and triethylamine sensing properties of mesoporous α-Fe2O3 microrods
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DOI：
10.1016/j.matlet.2016.04.209
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发表时间：
2016-09-01
影响因子：
3
通讯作者：
Zhang, Zhanying
中科院分区：
文献类型：
--
作者：
Sun, Guang;Chen, Honglin;Zhang, Zhanying
以预先合成的FeC 2 O 4中心点2 H（2）O为牺牲模板剂，采用简单可靠的两步法成功合成了α-Fe 2 O3介孔微米棒（MPMR）。采用XRD、FESEM、TEM、N2吸附-脱附等手段对样品进行了表征。结果表明，在热分解过程中，FeC 2 O 4中心点2 H（2）O前驱体可以将其形貌传递到α-Fe 2 O3产物中，同时在α-Fe 2 O3微米棒中产生了大量的孔，孔的主要尺寸在5 nm左右。α-Fe 2 O 3的BET表面积为122.7 m2/g。该传感器对三乙胺（TEA）具有较低的最佳工作温度（275 ℃）、较高的响应度和较宽的气体浓度范围（20-300 ppm）内良好的线性度，有望应用于TEA的检测。(C)2016爱思唯尔B. V.保留所有权利。
Mesoporous microrods (MPMRs) of alpha-Fe2O3 were successfully synthesized via a facile and reliable two-step route by using pre-synthesized FeC2O4 center dot 2H(2)O as sacrificial template. The prepared samples were characterized by XRD, FESEM, TEM, and N-2 adsorption-desorption, respectively. Results indicated that during the thermal decomposition process, the FeC2O4 center dot 2H(2)O precursor can pass its morphology on to the alpha-Fe2O3 product, meanwhile, a large amount of pores with the dominant size around 5 nm were created in the alpha-Fe2O3 microrods. The BET surface area of the alpha-Fe2O3 is 122.7 m(2)/g. The sensor fabricated with as-prepared alpha-Fe2O3 MPMRs exhibited impressive gas-sensing characteristics towards triethylamine (TEA), such as relativity low optimum operating temperature (275 degrees C), high response, and good linearity in a wide gas concentration range (20-300 ppm), implying its promising application in detecting TEA. (C) 2016 Elsevier B.V. All rights reserved.