以九水硝酸铁(Fe(NO3)3·9H2O)为铁源、氢氧化钠(NaOH)为沉淀剂、氟化钠(NaF)为配位剂和十六烷基三甲基溴化铵(CTAB)为表面活性剂,通过水热法制备了α-Fe2O3纳米片。并采用X射线粉末衍射(XRD)和扫描电镜(SEM)对样品进行了结构和形貌表征,在不同条件下对其进行气敏性能测试。结果表明,α-Fe2O3纳米片的直径约为0.5～1.6μm,厚度约为80～100nm;α-Fe2O3纳米片对三乙胺气体有着良好的选择性和较高的灵敏度,最佳工作温度为240℃。在240℃时,对50μL的三乙胺灵敏度达到了45.5;在240℃时,对100×10-6的三乙胺的响应时间约为8s,恢复时间约2s。
α-Fe2O3 nanosheets were prepared by hydrothermal method using Fe(NO3)3·9H2O as an iron source,sodium hydroxide (NaOH) as precipitant,sodium fluoride (NaF) as complexing agent and cetyltrimethylammonium bromide (CTAB) as surfactant.The structure and morphology of the samples were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM).The results shown that the diameter of α-Fe2O3 nanosheets was about 0.5～1.6μm,and the thickness was about 80～100nm.α-Fe2O3 nanosheets had good selectivity and high sensitivity to triethylamine gas,and the optimal working temperature was 240℃.The sensitivity of 50μL triethylamine reached 45.5 at 240℃,and the response time to 100ppm triethylamine was about 8s and the recovery time was about 2s at 240℃.
[1] Bai S L,Han J Y,Han N,et al.An alpha-Fe2O3/NiO p-n hierarchical heterojunction for the sensitive detection of triethylamine[J].Inorganic Chemistry Frontiers,2020,7(7):1532-1539.
[2] Oliver J D,Claudia H H,Paul M K,et al.The synthesis,characterisation and application of iron(Ⅲ)-acetate complexes for cyclic carbonate formation and the polymerisation of lactide[J].Dalton Transactions,2019,48(40):15049-15058.
[3] Wei Q,Song J,Song P,et al.Spindle-like Fe2O3/ZnFe2O4 porous nanocomposites derived from metal-organic frameworks with excellent sensing performance towards triethylamine[J].Sensors & Actuators B:Chemical,2020,317:128205.
[4] Cheng B Z,Yi L,Li Y D,et al.Novel malonic acid assisted synthesized porous Fe2O3 microspheres for ultra-fast response and recovery toward triethylamine[J].New Journal of Chemistry,2020,44(15):5929-5936.
[5] 顾怡红,张元祥.α-Fe2O3纳米棒的制备及其丙酮气敏性能[J].传感技术学报,2019,32(2):177-182.
[6] 付双,刘得水,李红梅,等.α-Fe2O3纳米微球的合成及气敏性能研究[J].化学试剂,2018,40(3):269-273.
[7] 周晓飞,邹彦昭,林果,等.核壳结构α-Fe2O3的制备及其气敏性能的增强[J].功能材料,2016,47(11):11210-11214.
[8] 马健,寇雪莹,丁梦迪,等.棒束花状α-Fe2O3的制备及其气敏特性[J].吉林大学学报(理学版),2016,54(1):116-120.
[9] L De Los Santos V,Bustamante Dominguez A,Leon Felix L,et al.Characterization and magnetic properties of hollow alpha-Fe2O3 microspheres obtained by sol-gel and spray roasting methods[J].Advanced Materials and Devices,2019,4(3):483-491.
[10] Zhu T,Ong W L,Zhu L L Z,et al.TiO2 fibers supported beta-FeOOH nanostructures as efficient visible light photocatalyst and room temperature sensor[J].Scientific Reports,2015,5:10601.
[11] Yang C,Zhang J L,Zhu X R,et al.Deep and efficient removal of vanadium from molybdate solution using magnetic gamma-Fe2O3 nanoparticles[J].Applied Surface Science,2019,529:147060.
[12] Hoo Q Y,Liang,Y H,Yan,X L,et al.Millimeter-sized flower-like clusters composed of mullite and epsilon-Fe2O3 on the Hare's Fur Jian Ware[J].Journal of the European Ceramic Society,2020,40(12):4340-4347.
[13] Haridas V,Sukhananazerin A,Sneha J M,et al.Alpha-Fe2O3 loaded less-defective graphene sheets as chemiresistive gas sensor for selective sensing of NH3[J].Applied Surface Science,2020,517:146158.
[14] Beniwal A,Sunny.SnO2-ZnO-Fe2O3 tri-composite based room temperature operated dual behavior ammonia and ethanol sensor for ppb level detection[J].Nanoscale,2020,12(38):19732-19745.
[15] Wang L L,Lou Z H,Deng,J N,et al.Ethanol gas detection using a yolk-shell (core-shell) alpha-Fe2O3 nanospheres as sensing material[J].ACS Applied Material & Interfaces,2015,7(23):13098-13104.
[16] Dai M J,Zhao L P,Gao H Y,et al.Hierarchical assembly of -Fe2O3 nanorods on multiwall carbon nanotubes as a high-performance sensing material for gas sensors[J].ACS Applied Material & Interfaces,2017,9(10):8919-8928.
[17] Xu Q,Zhang Z C,Song X P,et al.Improving the triethylamine sensing performance based on Debyelength:a case study on α-Fe2O3@NiO(CuO) core-shell nanorods sensor working at near room-temperature[J].Sensors and Actuators B Chemical,2017,245:375-385.
[18] Dutt M,Ratan A,Tomar M,et al.Mesoporous metal oxide-alpha-Fe2O3 nanocomposites for sensing formaldehyde and ethanol at room temperature[J].Journal of Physics and Chemistry of Solids,2020,145:109536.
[19] 潘帅,贺蒙,王旭,等.离子液体辅助合成α-Fe2O3纳米棒及其气敏性能[J].硅酸盐学报,2019(3):336-344.
