化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (11) : 123-127. DOI: 10.19817/j.cnki.issn 1006-3536.2021.11.026

新材料与新技术

微波-超声辅助法制备棒状氧化镧及其气敏性能研究

作者信息 +

Preparation of rodlike La₂O₃ by microwave-ultrasonic assisted method and its gas sensing property

Zhu Linna, Sun Lixia, Yuan Xueling, Bian Shuaijuan, Liao Dankui, Sun Jianhua

Author information +

文章历史 +

Received		Published
2020-07-28		2021-11-20
Issue Date	Revised Date
2021-12-13	2020-07-28

PDF

摘要

氧化镧(La₂O₃)是一种环境友好、稳定性高的传感候选材料。以硝酸镧、尿素为原料,采用微波-超声辅助合成法制备棒状结构的p型半导体氧化镧。通过差热-热重综合分析仪(TG-DTA)对氧化镧形成机理进行分析,采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和比表面积测试(BET)等分析技术对氧化镧进行表征,并对其气敏性能进行测试。结果表明:微波功率为300W,超声波功率为150W,反应时间为2h,煅烧温度为750℃时,得到宽度为220nm,长度为1.2μm的棒状氧化镧,该样品在400℃的工作温度下,对乙醇具有良好的选择性及快速响应(响应时间6s),响应值高达54.3。

Abstract

Lanthanum oxide (La₂O₃) is an environmentally friendly and stable sensing material.The rodlike p-type semiconductor La₂O₃ was prepared by microwave-ultrasonic assisted synthesis method using lanthanum nitrate and urea as raw materials.The formation mechanism of La₂O₃ was analyzed by TG-DTA.La₂O₃ were characterized by X-ray diffraction (XRD),scanning electron microscope (SEM) and specific surface area test (BET),and tested its gas-sensing performance.The results shown that:when the microwave power was 300W,the ultrasonic power was 150W,the reaction time was 2h,the calcination temperature was 750℃,got La₂O₃ as a 1.2μm rod with a diameter of 220nm.At the operating temperature of 400℃,the sample had good selectivity and rapid response to ethanol (response time 6s),and the response value was up to 54.3.

关键词

稀土氧化物 / 氧化镧 / 乙醇 / 气敏性能 / 气敏机制

Key words

rare earth oxide / lanthanum oxide / ethanol / gas sensing property / gas sensing mechanism

引用本文

引用格式 ▾

微波-超声辅助法制备棒状氧化镧及其气敏性能研究[J]. 化工新型材料, 2021, 49(11): 123-127 DOI:10.19817/j.cnki.issn 1006-3536.2021.11.026

登录浏览全文

4963

注册一个新账户忘记密码

参考文献

原文顺序 | 出版日期 | 本文引用

[1] 王俊婷,王秋雯,张人龙,等.稀土氧化物及其在聚酰亚胺薄膜改性中的研究进展[J].化工新型材料,2020,48(5):12-15.
[2] 许晓芳,谭全银,刘丽丽,等.稀土元素分离与提纯技术研究现状及展望[J].环境污染与防治,2019,41(7):844-851.
[3] Umar A,Ibrahim A A,Kumar R,et al.Fern shaped La₂O₃ nanostructures as potential scaffold for efficient hydroquinone chemical sensing application[J].Ceramics International,2020,46(4):5141-5148.
[4] 张晶,赵伟杰,奚立民,等.纳米氧化镧及其复合氧化物的制备及应用最新研究进展[J].稀土,2017,38(4):122-134.
[5] Yadav A A,Lokhande A C,Pujari R B,et al.The synthesis of multifunctional porous honey comb-like La₂O₃ thin film for supercapacitor and gas sensor applications[J].Journal of Colloid and Interface Science,2016,484:51-59.
[6] 谈玲华,李勤华,郭长平,等.纳米La₂O₃及其复合氧化物的制备方法研究进展[J].微纳材料与结构,2010,47(5):257-266.
[7] Baghbanzadeh M,Carbone L,Cozzoli P D,et al.Microwave-assisted synthesis of colloidal inorganic nanocrystals[J].Angewandte Chemie International Edition,2011,50(48):11312-11359.
[8] Bi J W,Sun L X,Wei Q M,et al.Rapid ultrasonic-microwave assisted synthesis of Eu³⁺ doped Y₂O₃ nanophosphors with enhanced luminescence properties[J].Journal of Materials Research and Technology,2020,9(5):9523-9530.
[9] 程效锐,张舒研,房宁.超声空化技术在化工领域的应用研究进展[J].应用化工,2018,47(8):1753-1757.
[10] Liu Q,Liu E,Li J,et al.Rapid ultrasonic-microwave assisted synthesis of spindle-like Ag/ZnO nanostructures and their enhanced visible-light photocatalytic and antibacterial activities[J].Catalysis Today,2019,399:391-402.
[11] Wang Y J,Zhang X,Qiu D,et al.Ultrasonic assisted microwave synthesis of poly (chitosan-co-gelatin)/polyvinyl pyrrolidone IPN hydrogel[J].Ultrasonics-Sonochemistry,2017,40:714-719.
[12] Li J J,Tang Y P,Ru Y J,et al.Ultrasonic-microwave assisted synthesis of GO/g-C₃N₄ composites for efficient photocatalytic H₂ evolution[J].Solid State Sciences,2019,97:105990.
[13] Yadav A K,Singh R K,Singh P.Fabrication of lanthanum ferrite based liquefied petroleum gas sensor[J].Sensors and Actuators B:Chemical,2016,229:25-30.
[14] Chen K,Guo S,Zeng Y,et al.Facile preparation and characterization of lanthanum oxide powders by the calcination of lanthanum carbonate hydrate in microwave field[J].Ceramics International,2019,46(1):165-170.
[15] Al-Ghouti M A,Da'Ana D.Guidelines for the use and interpretation of adsorption isotherm models:a review[J].Journal of Hazardous Materials,2020,393:122383.
[16] Yoon J W,Choi J K,Lee J H.Design of a highly sensitive and selective C₂H₅OH sensor using p-type Co₃O₄ nanofibers[J].Sensors and Actuators B:Chemical,2012,161(1):570-577.
[17] Liu H,He Y,Nagashima K,et al.Discrimination of VOCs molecules via extracting concealed features from a temperature-modulated p-type NiO sensor[J].Sensors and Actuators B:Chemical,2019,293:342-349.
[18] Sun J H,Sun L X,Han N,et al.Ordered mesoporous WO₃/ZnO nanocomposites with isotype heterojunctions for sensitive detection of NO₂[J].Sensors and Actuators B:Chemical,2019,285:68-75.
[19] Yadav A A,Lokhande A C,Kim J H,et al.Improvement in CO₂ sensing characteristics using Pd nanoparticles decorated La₂O₃ thin films[J].Journal of Industrial and Engineering Chemistry,2019,4:76-81.