微波水热合成NiGa_2O_4纳米粉体及其气敏性能
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摘要
采用微波辅助水热法制备了NiGa_2O_4纳米粉体。用X射线衍射光谱、扫描电子显微镜、透射电子显微镜和X射线光电子能谱等研究了反应温度、时间和沉淀pH对NiGa_2O_4的相组成以及气敏性能的影响。结果表明:微波水热下,180℃反应2 h合成晶型较好的NiGa_2O_4粉体。在pH为10、180℃反应2 h合成的NiGa_2O_4于室温下对三甲胺有较高的响应和较好选择性。对10×10~(-6)(mL/m~3)三甲胺响应值达到3.5,响应时间约为75 s,恢复时间约为45 s;最低检测限为1×10~(-6),响应值约为1.8。
NiGa_2O_4 nano-powder was synthesized by a microwave-assisted hydrothermal method.The effects of reaction temperature,time and pH value on the phase composition and gas sensing properties of NiGa_2O_4 powder were investigated by X-ray diffraction,scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy.The results indicated that NiGa_2O_4 powder with a good crystal morphology could be synthesized under microwave irradiation at 180 ℃ for 2 h.And the above synthesized NiGa_2O_4 nano-powder has a higher response and a good selectivity to trimethylamine at room temperature.The sensitivity of NiGa_2O_4 gas sensor to 10×10~(-6)(volume fraction) trimethylamine is 3.5, the response time is approximately 75 s; the recovery time is approximately 45 s; and the minimum detection limit to 1×10~(-6) reaches 1.8.
NiGa_2O_4 nano-powder was synthesized by a microwave-assisted hydrothermal method.The effects of reaction temperature,time and pH value on the phase composition and gas sensing properties of NiGa_2O_4 powder were investigated by X-ray diffraction,scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy.The results indicated that NiGa_2O_4 powder with a good crystal morphology could be synthesized under microwave irradiation at 180 ℃ for 2 h.And the above synthesized NiGa_2O_4 nano-powder has a higher response and a good selectivity to trimethylamine at room temperature.The sensitivity of NiGa_2O_4 gas sensor to 10×10~(-6)(volume fraction) trimethylamine is 3.5, the response time is approximately 75 s; the recovery time is approximately 45 s; and the minimum detection limit to 1×10~(-6) reaches 1.8.
引文
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[2]MITSUBAYASHI K,KUBOTERA Y,YANO K,et al.Trimethylamine biosensor with flavin-containing monooxygenase type 3(FMO3)for fish-freshness analysis[J].Sens Actuators B,2004,103(12):463-467.
[3]PERILLO P M,RODRIGUZE D F.Low temperature trimethylamine flexible gas sensor based on TiO2 membrane nanotubes[J].J Alloy Compd,2016,657:765-769.
[4]ZHANG G,LI C,CHENG F,et al.ZnFe2O4 tubes:Synthesis and application to gas sensors with high sensitivity and low-energy consumption[J].Sens Actuators B,2007,120(2):403-410.
[5]PATIL J Y,NADARGI D Y,GURAY J L,et al.Synthesis of glycine combusted NiFe2O4,spinel ferrite:A highly versatile gas sensor[J].Mater Lett,2014,124(6):144-147.
[6]CHEN H,LI G D,FAN M,et al.Electrospinning preparation of mesoporous spinel gallate(MGa2O4;M=Ni,Cu,Co)nanofibers and their M(Ⅱ)ions-dependent gas sensing properties[J].Sens Actuators B,2017,240:689-696.
[7]PARK S,AN S,MUN Y,et al.UV-enhanced room-temperature gas sensing of ZnGa2O4,nanowires functionalized with Au catalyst nanoparticles[J].Appl Phys Lett,2014,114(3):903-910.
[8]XUE H,LI Z,DING Z,et al.Hollow rods of nanocrystalline NiGa2O4:Hydrothermal synthesis,formation mechanism,and application in photocatalysis[J].Cryst Growth Des,2008,8(12):4511-4516.
[9]葛秀涛,方大儒,刘杏芹.Ga2O3-NiO复合氧化物的溶胶-凝胶法制备和气敏性能[J].物理化学学报,2005,21(1):10-15.GE Xiutao,FANG Daru,LIU Xiuqing.Acta Phys-Chim Sin(in Chinese),2005,21(1):10-15.
[10]CHU X,WANG J,BAI L,et al.Trimethylamine and ethanol sensing properties of NiGa2O4,nano-materials prepared by co-precipitation method[J].Sens Actuators B,2018,255:2058-2065.
[11]CHU X,WANG J,BAI L,et al.The gas sensing properties of NiGa2O4nanofibers prepared by electrospinning method[J].Mater Sci Eng B,2018,228:45-51.
[12]CHO Y H,KANG Y C,LEE J H.Highly selective and sensitive detection of trimethylamine using WO3 hollow spheres prepared by ultrasonic spray pyrolysis[J].Sens Actuators B,2013,176(6):971-977.
[13]WOO H S,NA C W,KIM I D,et al.Highly sensitive and selective trimethylamine sensor using one-dimensional ZnO-Cr2O3hetero-nanostructures[J].Nanotechnology,2012,23(24):245501.
[14]KIM K M,CHOI K I,JEONG H M,et al.Highly sensitive and selective trimethylamine sensors using Ru-doped Sn O2 hollow spheres[J].Sens Actuators B,2012,166/167:733-738.
[15]LEE C S,KIM I D,LEE J H.Selective and sensitive detection of trimethylamine using ZnO-In2O3 composite nanofibers[J].Sens Actuators B,2013,181(5):463-470.
[16]HU T,CHU X,GAO F,et al.Trimethylamine sensing properties of graphene quantum Dots/α-Fe2O3 composites[J].J Solid State Chem,2016,237:284-291.
[17]YANG T,WANG D,ZHAI C,et al.Ultrafast response and recovery of single crystallineα-Fe2O3 nanorhombohedrons for trimethylamine sensing applications[J].Mater Lett,2018,210:1-3
[18]CHU X,ZHOU S,ZHANG W,et al.Trimethylamine sensing properties of nano-LaFeO3 prepared using solid-state reaction in the presence of PEG400[J].Mater Sci Eng B,2009,164(1):65-69.
[19]董向兵,程知萱,潘庆谊,等.氧化铟纳米棒的气敏特性[J].硅酸盐学报,2006,34(10):1191-1194.BO Xiaoqing,LIU Changbai,WANG Lianyuan,et al.J Chin Ceram Soc,2006,34(10):1191-1194.
[20]MIRZAEI A,NERI G.Microwave-assisted synthesis of metal oxide nanostructures for gas sensing application:a review[J].Sens Actuators B,2016,237:749-775.
[21]王熙慧,吕子剑,吴钢,等.一种硝酸镓的制备方法[P].CN Patent,1762825.2006-09-13.WANG Xihui,LV Zijian,WU Gan,et al.Preparation method of yttrium nitrate(in Chinese).CN Patent,1762825.2006-09-13.
[22]KALVESTEN E,VIEIDER C,LOFDAHL L,et al.An integrated pressure-flow sensor for correlation measurements in turbulent gas flows[J].Sens Actuators A,1996,52(1/3):51-58.