Enhanced sensor response of Ni-doped SnO2 hollow spheres

A novel sensing material of Ni-doped SnO2 hollow spheres was prepared and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, inductively coupled plasma-optical emission spectroscopy and transmission electron microscopy. Gas sensing properties of the sensor fabricated from the as-prepared Ni-doped SnO2 hollow spheres were systematically investigated and compared with those of pristine SnO2 hollow spheres. Results showed that the Ni-doped sensor had a good selectivity to higher alcohols such as n-butanol with much higher response, while the undoped sensor exhibited poor response to all the tested gases with poor selectivity. The enhanced sensor performances are probably attributed to the formation of p–n heterojunctions between p-type NiO and n-type SnO2. It also suggests that the Ni-dopant is a promising substitute for noble metal additives to fabricate sensor materials with a low cost.

[1]  Makoto Egashira,et al.  Preparation of macroporous SnO2 films using PMMA microspheres and their sensing properties to NOx and H2 , 2005 .

[2]  Xiangfeng Chu,et al.  Highly sensitive gas sensors based on hollow SnO2 spheres prepared by carbon sphere template method , 2007 .

[3]  K. Sreenivas,et al.  Fast response H2S gas sensing characteristics with ultra-thin CuO islands on sputtered SnO2 , 2003 .

[4]  Thorsten Wagner,et al.  Gas Sensing Properties of Ordered Mesoporous SnO2 , 2006, Sensors (Basel, Switzerland).

[5]  Di Zhang,et al.  Biogenic synthesis of tubular SnO2 with hierarchical intertextures by an aqueous technique involving glycoprotein. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[6]  Guang Xiong,et al.  Structure and Reducibility of NiO-MoO3/γ-Al2O3 Catalysts: Effects of Loading and Molar Ratio , 2008 .

[7]  N. Yamazoe,et al.  Preparation of grain size-controlled tin oxide sols by hydrothermal treatment for thin film sensor application , 2004 .

[8]  Yadong Li,et al.  Use of carbonaceous polysaccharide microspheres as templates for fabricating metal oxide hollow spheres. , 2006, Chemistry.

[9]  Jun Zhang,et al.  NO2 sensing performance of SnO2 hollow-sphere sensor , 2009 .

[10]  Jie Zhu,et al.  Hierarchical porous/hollow tin oxide nanostructures mediated by polypeptide: surface modification, characterization, formation mechanism and gas-sensing properties , 2006 .

[11]  Baolin Zhu,et al.  H2S sensing characteristics of Pt-doped α-Fe2O3 thick film sensors , 2007 .

[12]  Steve Semancik,et al.  Porous tin oxide nanostructured microspheres for sensor applications. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[13]  Douglas Gouvêa,et al.  Microstructure and structure of NiO-SnO2 and Fe2O3-SnO2 systems , 2003 .

[14]  R. P. Pant,et al.  Effect of Ni doping on thick film SnO2 gas sensor , 2006 .

[15]  B. Geng,et al.  Facile Production of Self-Assembly Hierarchical Dumbbell-Like CoOOH Nanostructures and Their Room-Temperature CO-Gas-Sensing Properties , 2008 .

[16]  Elson Longo,et al.  A New Method to Control Particle Size and Particle Size Distribution of SnO2 Nanoparticles for Gas Sensor Applications , 2000 .

[17]  Chen-Sheng Yeh,et al.  Hydrothermal Synthesis of SnO2 Nanoparticles and Their Gas-Sensing of Alcohol , 2007 .

[18]  Jun Zhang,et al.  Low-temperature H2S sensors based on Ag-doped α-Fe2O3 nanoparticles , 2008 .

[19]  N. Yamazoe.  New approaches for improving semiconductor gas sensors , 1991 .

[20]  Makoto Egashira,et al.  Preparation and gas-sensing properties of thermally stable mesoporous SnO2 , 2002 .

[21]  Kengo Shimanoe,et al.  Nanotubular SnO2 Templated by Cellulose Fibers: Synthesis and Gas Sensing , 2005 .

[22]  Jun Zhang,et al.  Au-doped WO3-based sensor for NO2 detection at low operating temperature , 2008 .

[23]  Dmitri O. Klenov,et al.  Enhanced gas sensing by individual SnO2 nanowires and nanobelts functionalized with Pd catalyst particles. , 2005, Nano letters.

[24]  Jun Zhang,et al.  ZnO hollow spheres: Preparation, characterization, and gas sensing properties , 2009 .

[25]  Michael Tiemann,et al.  Porous metal oxides as gas sensors. , 2007, Chemistry.

[26]  Shaoping Xu,et al.  A Comparison of NiMo/Al2O3 Catalysts Prepared by Impregnation and Coprecipitation Methods for Hydrodesulfurization of Dibenzothiophene , 2007 .

[27]  G. Korotcenkov,et al.  (Cu, Fe, Co, or Ni)-doped tin dioxide films deposited by spray pyrolysis: Doping influence on thermal stability of the film structure , 2009 .

[28]  Jun Zhang,et al.  Porous α-Fe2O3 decorated by Au nanoparticles and their enhanced sensor performance , 2010, Nanotechnology.

[29]  A. Jiménez-lópez,et al.  Hydrogenation and Ring-Opening of Tetralin on Ni and NiMo Supported on Alumina-Pillared α-Zirconium Phosphate Catalysts. A Thiotolerance Study , 2001 .

[30]  Phaedon Avouris,et al.  Field-Effect Transistors Based on Single Semiconducting Oxide Nanobelts , 2003 .

[31]  Chao-Nan Xu,et al.  Grain size effects on gas sensitivity of porous SnO2-based elements , 1991 .

[32]  Meilin Liu,et al.  Effect of particle size and dopant on properties of SnO2-based gas sensors , 2000 .

[33]  Xiaoming Sun,et al.  Highly sensitive WO3 hollow-sphere gas sensors. , 2004, Inorganic chemistry.

[34]  Yong Wang,et al.  One‐Pot Synthesis and Hierarchical Assembly of Hollow Cu2O Microspheres with Nanocrystals‐Composed Porous Multishell and Their Gas‐Sensing Properties , 2007 .

[35]  Dieter Kohl,et al.  Function and applications of gas sensors , 2001 .

[36]  Jinsoo Park,et al.  Synthesis and high gas sensitivity of tin oxide nanotubes , 2008 .