Facile synthesis of La-doped In2O3 hollow microspheres and enhanced hydrogen sulfide sensing characteristics

Abstract The undoped and 1.0–5.0 mol% La–doped In2O3 hollow microspheres have been successfully synthesized via a simple hydrothermal method without template and gas sensor have been fabricated basing on them. The nanostructures and morphologies of the maintained hollow spheres were characterized by various experimental techniques. The gas sensing properties of these hollow microspheres were investigated systematically. The results indicated that among all the samples (pure, 1.0, 3.0 and 5.0 mol% La–doped In2O3), 3.0 mol% La–doped In2O3 exhibited the highest response toward 10 ppm hydrogen sulfide (H2S) at 200 °C, having a response value of 17.8, approximately 4.8 times higher than pure In2O3. Furthermore, excellent selectivity, good repeatability and outstanding long-term stability were also achieved. The significantly enhanced sensing properties to H2S could be attributed to the changes in distribution of different oxygen components, crystallite size and specific surface area caused by La doping.

[1]  B. Xiao,et al.  Fabrication of mesoporous In2O3 nanospheres and their ultrasensitive NO2 sensing properties , 2017 .

[2]  Chao Li,et al.  Diameter‐Controlled Growth of Single‐Crystalline In2O3 Nanowires and Their Electronic Properties , 2003 .

[3]  G. Lu,et al.  Design of Superior Ethanol Gas Sensor Based on Al-Doped NiO Nanorod-Flowers , 2016 .

[4]  Peng Sun,et al.  Hierarchical nanorod-flowers indium oxide microspheres and their gas sensing properties , 2016 .

[5]  S. Ghosh,et al.  Enhanced H2S sensing characteristics of La-doped In2O3: Effect of Pd sensitization , 2009 .

[6]  Jinxian Wang,et al.  Highly active and porous single-crystal In2O3 nanosheet for NOx gas sensor with excellent response at room temperature , 2017 .

[7]  Yujin Chen,et al.  Highly sensitive and selective H2S sensor based on porous ZnFe2O4 nanosheets , 2017 .

[8]  Zhenli Qiu,et al.  Cu2+-Doped SnO2 Nanograin/Polypyrrole Nanospheres with Synergic Enhanced Properties for Ultrasensitive Room-Temperature H2S Gas Sensing. , 2017, Analytical chemistry.

[9]  Peng Sun,et al.  Ultrasensitive and low detection limit of acetone gas sensor based on W-doped NiO hierarchical nanostructure , 2015 .

[10]  Jiaqiang Xu,et al.  Hydrothermal synthesis of In2O3 for detecting H2S in air , 2006 .

[11]  C. Liu,et al.  Polythiophene-WO3 hybrid architectures for low-temperature H2S detection , 2014 .

[12]  Yingkai Liu,et al.  Room temperature ppb level H2S detection of a single Sb-doped SnO2 nanoribbon device , 2015 .

[13]  Dong Liu,et al.  Enhanced acetone gas-sensing performance of La2O3-doped flowerlike ZnO structure composed of nanorods , 2013 .

[14]  G. Lu,et al.  Template-free microwave-assisted synthesis of ZnO hollow microspheres and their application in gas sensing , 2013 .

[15]  K. Kan,et al.  Synthesis of mesoporous K2O-In2O3 nanowires and NOx gas sensitive performance study in room temperature , 2017 .

[16]  N. Yamazoe,et al.  Oxide Semiconductor Gas Sensors , 2003 .

[17]  Kengo Shimanoe,et al.  Hydrogen sulfide gas sensing properties of thin films derived from SnO2 sols different in grain size , 2005 .

[18]  Dinesh K. Aswal,et al.  Sub-ppm H2S sensing at room temperature using CuO thin films , 2010 .

[19]  Mingzhe Zhang,et al.  Facile synthesis of In2O3 nanoparticles for sensing properties at low detection temperature , 2016 .

[20]  Yingkai Liu,et al.  A Single Eu-Doped In2O3 Nanobelt Device for Selective H2S Detection , 2015, Sensors.

[21]  Hongwen Zhang,et al.  Room temperature H2S gas sensing properties of In2O3 micro/nanostructured porous thin film and hydrolyzation-induced enhanced sensing mechanism , 2016 .

[22]  Xiumei Xu,et al.  One-step synthesis and gas sensing properties of hierarchical Cd-doped SnO2 nanostructures , 2014 .

[23]  Xiaobing Hu,et al.  Highly sensitive H2S gas sensors based on Pd-doped CuO nanoflowers with low operating temperature , 2017 .

[24]  G. Lu,et al.  Sub-ppm H2S sensor based on YSZ and hollow balls NiMn2O4 sensing electrode , 2014 .

[25]  B. Xiao,et al.  Facile synthesis of nanoparticle packed In2O3 nanospheres for highly sensitive NO2 sensing , 2017 .

[26]  Zhi-xuan Cheng,et al.  Porous corundum-type In2O3 nanoflowers: controllable synthesis, enhanced ethanol-sensing properties and response mechanism , 2015 .

[27]  Fang Chen,et al.  Superior acetone gas sensor based on electrospun SnO2 nanofibers by Rh doping , 2018 .

[28]  S. Phanichphant,et al.  Highly-sensitive H2S sensors based on flame-made V-substituted SnO2 sensing films , 2017 .

[29]  Qingyi Pan,et al.  Preparation and characterization of In2O3 nanorods , 2006 .

[30]  S. Ghosh,et al.  H2S sensing properties of La-doped nanocrystalline In2O3 , 2008 .

[31]  Qiuyun Ouyang,et al.  Sonochemical synthesis and ppb H2S sensing performances of CuO nanobelts , 2013 .

[32]  B. Tatarchuk,et al.  Characterization of active sites, determination of mechanisms of H(2)S, COS and CS(2) sorption and regeneration of ZnO low-temperature sorbents: past, current and perspectives. , 2011, Physical chemistry chemical physics : PCCP.

[33]  Hongbin Zhao,et al.  Facile synthesis of reduced graphene oxide/hexagonal WO3 nanosheets composites with enhanced H2S sensing properties , 2016 .

[34]  Shuyi Ma,et al.  Excellent acetone sensor of La-doped ZnO nanofibers with unique bead-like structures , 2015 .

[35]  Zhangshu Huang,et al.  Hydrothermal synthesis of Ce-doped hierarchical flower-like In2O3 microspheres and their excellent gas-sensing properties , 2018 .

[36]  I. Mulla,et al.  H2S gas sensitive indium-doped ZnO thin films: Preparation and characterization , 2009 .

[37]  H. Cui,et al.  Synthesis of In2O3 nanoparticle/TiO2 nanobelt heterostructures for near room temperature ethanol sensing , 2017 .

[38]  Fengmin Liu,et al.  Solid-state potentiometric H2S sensor combining NASICON with Pr6O11-doped SnO2 electrode , 2007 .

[39]  Baoqing Zhang,et al.  Microstructure and enhanced H2S sensing properties of Pt-loaded WO3 thin films , 2014 .

[40]  Ashutosh Kumar Singh,et al.  H2S sensing using in situ photo-polymerized polyaniline–silver nanocomposite films on flexible substrates , 2014 .

[41]  Young Jun Hong,et al.  High performance chemiresistive H2S sensors using Ag-loaded SnO2 yolk–shell nanostructures , 2014 .

[42]  D. K. Aswal,et al.  Flexible H2S sensor based on gold modified polycarbazole films , 2014 .

[43]  Guodong Li,et al.  Enhanced formaldehyde sensing performance at ppb level with Pt-doped nanosheet-assembled In2O3 hollow microspheres , 2018 .

[44]  Baolin Zhu,et al.  Synthesis and characterization of Pd-doped α-Fe2O3 H2S sensor with low power consumption , 2007 .

[45]  Xin Guo,et al.  Hierarchical and Hollow Fe2O3 Nanoboxes Derived from Metal-Organic Frameworks with Excellent Sensitivity to H2S. , 2017, ACS applied materials & interfaces.

[46]  Yun Yan,et al.  Synthesis of biomorphic tube-like CuO using pomelo white flesh as biotemplate and its sensing properties over H2S at room temperature , 2017, Journal of Materials Science.

[47]  Jinxian Wang,et al.  An In2O3 nanorod-decorated reduced graphene oxide composite as a high-response NOx gas sensor at room temperature , 2017 .

[48]  Il-Doo Kim,et al.  Selective, sensitive, and reversible detection of H2S using Mo-doped ZnO nanowire network sensors , 2014 .