Preparation of biomorphic porous LaFeO3 by sorghum straw biotemplate method and its acetone sensing properties

Abstract Biomorphic porous LaFeO 3 has been successfully fabricated using sorghum straw as biotemplate. This simple synthesis route could be expected to be extended for the preparation of biomorphic porous metal oxide gas-sensing materials. The structure and morphology of the products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and N 2 adsorption–desorption analyses. Testing results reveal that the as-prepared LaFeO 3 shows the porous and network frameworks, which replicas with the structure characterizations of sorghum straw. Moreover, the framework is assembled by a large amount of interconnected nanocrystallites with the sizes of about 20–30 nm, and there are plenty of voids between the nanocrystallites in the framework. Gas sensing investigation showed that the sensor based on biomorphic porous LaFeO 3 exhibited higher response to acetone gas compared with that of bulk LaFeO 3 particles. The enhancement in gas sensing properties was attributed to their porous structure, large surface areas, numerous surface active sites and more oxygen vacancies.

[1]  M. Jiang,et al.  Preparation, electrical and gas-sensing properties of perovskite-type La1−xMgxFeO3 semiconductor materials , 2007 .

[2]  Zongping Shao,et al.  A composite oxygen-reduction electrode composed of SrSc0.2Co0.8O3−δ perovskite and Sm0.2Ce0.8O1.9 for an intermediate-temperature solid-oxide fuel cell , 2010 .

[3]  N. Bârsan,et al.  Metal oxide-based gas sensor research: How to? , 2007 .

[4]  H. Shui,et al.  Trimethylamine sensing properties of nano-LaFeO3 prepared using solid-state reaction in the presence of PEG400 , 2009 .

[5]  M. Tiemann,et al.  Ordered mesoporous ZnO for gas sensing , 2007 .

[6]  Di Zhang,et al.  Hierarchical Metal Oxides Assembled by Nanocrystallites Via a Simple Bio‐Inspired Route , 2007 .

[7]  P. Siciliano,et al.  CH3SH-sensing characteristics of LaFeO3 thick-film prepared by co-precipitation method , 2003 .

[8]  B. Dong,et al.  Controlled synthesis of highly ordered LaFeO3 nanowires using a citrate-based sol–gel route , 2006 .

[9]  Haiyan Song,et al.  Interfacial oxidation–dehydration induced formation of porous SnO2 hollow nanospheres and their gas sensing properties , 2013 .

[10]  Hao Wu,et al.  Synthesizing nanocrystal-assembled mesoporous magnesium oxide using cotton fibres as exotemplate , 2008 .

[11]  Di Zhang,et al.  The synthesis of hierarchical porous iron oxide with wood templates , 2005 .

[12]  Dong Zhang,et al.  Preparation of biomorphic porous calcium titanate and its application for preconcentration of nickel in water and food samples. , 2013, Materials science & engineering. C, Materials for biological applications.

[13]  G. Clavier,et al.  Organogelators for making porous sol–gel derived silica at two different length scales , 2000 .

[14]  Heino Sieber,et al.  Biomimetic synthesis of ceramics and ceramic composites , 2005 .

[15]  Di Zhang,et al.  Synthesis of Biomorphous Nickel Oxide from a Pinewood Template and Investigation on a Hierarchical Porous Structure , 2006 .

[16]  F. Kwong,et al.  Synthesis of a Biomorphic Molybdenum Trioxide Templated from Paper , 2008 .

[17]  Kengo Shimanoe,et al.  Theory of power laws for semiconductor gas sensors , 2008 .

[18]  Ji Zhou,et al.  A simple way to prepare nanosized LaFeO3 powders at room temperature , 2003 .

[19]  G. N. Chaudhari,et al.  Acetone gas-sensing performance of Sr-doped nanostructured LaFeO3 semiconductor prepared by citrate sol-gel route , 2011 .

[20]  Di Zhang,et al.  Hierarchically porous ZnO with high sensitivity and selectivity to H2S derived from biotemplates , 2009 .

[21]  H. Qin,et al.  Giant magnetoimpedance effect in La0.7Ca0.3MnO3 under low magnetic fields , 2001 .

[22]  F. Gao,et al.  Tailoring Cu valence and oxygen vacancy in Cu/TiO2 catalysts for enhanced CO2 photoreduction efficiency , 2013 .

[23]  B. Dong,et al.  Fabrication and structural properties of LaFeO3 nanowires by an ethanol–ammonia-based sol–gel template route , 2005 .

[24]  Duk-Dong Lee,et al.  Thick films of In, Bi and Pd metal oxides impregnated in LaCoO3 perovskite as carbon monoxide sensor , 2005 .

[25]  F. Iacomi,et al.  Synthesis of nanocrystalline La–Pb–Fe–O perovskite and methanol-sensing characteristics , 2012 .

[26]  Zhen-Lai Zhou,et al.  Surfactant CATB-assisted generation and gas-sensing characteristics of LnFeO3 (Ln = La, Sm, Eu) materials , 2009 .

[27]  L. J. Berchmans,et al.  Effect of antimony substitution on structural and electrical properties of LaFeO3 , 2008 .

[28]  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 .

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

[30]  N. N. Toan,et al.  Gas sensing with semiconducting perovskite oxide LaFeO3 , 2003 .

[31]  Liyang Lin,et al.  Effect of Ti on the gas sensing characteristic of (Ti0.5Sn0.5)O2 solid solutions , 2012 .

[32]  Di Zhang,et al.  Biotemplate-directed assembly of porous SnO2 nanoparticles into tubular hierarchical structures , 2006 .

[33]  W. Cai,et al.  Micro/Nanostructured Ordered Porous Films and Their Structurally Induced Control of the Gas Sensing Performances , 2010 .

[34]  K. Wiik,et al.  Electronic properties of polycrystalline LaFeO3. Part I: Experimental results and the qualitative role of Schottky defects , 2005 .

[35]  Minhua Jiang,et al.  Preparation, structure, resistance and methane-gas sensing properties of nominal La1−xMgxFeO3 , 2008 .

[36]  H. Inaba,et al.  Oxygen nonstoichiometry and defect equilibrium in the perovskite-type oxides La1−xSrxMnO3+d , 2000 .

[37]  Jipeng Cheng,et al.  Nickel-doped tin oxide hollow nanofibers prepared by electrospinning for acetone sensing , 2014 .

[38]  Lianfu Han,et al.  Magnetocaloric and Colossal Magnetoresistance Effect in Layered Perovskite La1.4 Sr1.6Mn2O7 , 2010 .

[39]  C. Au,et al.  Non-thermal plasma-assisted NOx storage and reduction on a LaMn0.9Fe0.1O3 perovskite catalyst , 2013 .

[40]  Peng Song,et al.  Preparation, characterization and acetone sensing properties of Ce-doped SnO2 hollow spheres , 2012 .

[41]  M. MacLachlan,et al.  Coordination chemistry: new routes to mesostructured materials. , 2009, Chemistry.

[42]  J. Bai,et al.  Biomorphic synthesis of long ZnO hollow fibers with porous walls , 2009 .

[43]  Xiu-juan Xu,et al.  Fabrication of N-type Fe2O3 and P-type LaFeO3 nanobelts by electrospinning and determination of gas-sensing properties , 2011 .

[44]  Carl A. Batt,et al.  Biotemplated Nanostructured Materials , 2008 .

[45]  Jifan Hu,et al.  CO2 sensing properties and mechanism of nanocrystalline LaFeO3 sensor , 2013 .

[46]  Di Zhang,et al.  Biomorphic synthesis of SnO2 microtubules on cotton fibers , 2005 .

[47]  J. Mizusaki,et al.  Nonstoichiometry and defect structure of the perovskite-type oxides La1−xSrxFeO3−° , 1985 .

[48]  A. Teleki,et al.  Semiconductor gas sensors: dry synthesis and application. , 2010, Angewandte Chemie.

[49]  Weimin Du,et al.  Preparation, characterization and gas-sensing properties of rare earth mixed oxides , 2004 .

[50]  Y. J. Lee,et al.  Epitaxial growth of LaFeO3 thin films by RF magnetron sputtering , 2004 .

[51]  Wei‐De Zhang,et al.  Biomolecule-assisted synthesis and gas-sensing properties of porous nanosheet-based corundum In2O3 microflowers , 2012 .

[52]  Jinhuai Liu,et al.  Large-scale selective preparation of porous SnO2 3D architectures and their gas-sensing property , 2012 .

[53]  K. Choi,et al.  Enhanced CO sensing characteristics of hierarchical and hollow In2O3 microspheres , 2009 .

[54]  Jing Xu,et al.  High-aspect-ratio single-crystalline porous In2O3 nanobelts with enhanced gas sensing properties , 2011 .

[55]  Di Zhang,et al.  Fabrication and gas sensitivity of SnO2 hierarchical films with interwoven tubular conformation by a biotemplate-directed sol–gel technique , 2006 .

[56]  Nathan T. Hahn,et al.  Enhancing visible light photo-oxidation of water with TiO2 nanowire arrays via cotreatment with H2 and NH3: synergistic effects between Ti3+ and N. , 2012, Journal of the American Chemical Society.

[57]  L. Malavasi,et al.  NdCoO3 perovskite as possible candidate for CO-sensors: thin films synthesis and sensing properties , 2005 .

[58]  Di Zhang,et al.  Biomorphic mineralization: From biology to materials , 2009 .

[59]  N. Xu,et al.  Facile and versatile preparation of silicalite-1 hollow structures using cotton threads as templates , 2007 .

[60]  F. Meldrum,et al.  Macroporous inorganic solids from a biomineral template , 2006 .