Hydrothermal synthesis of Ag modified ZnO nanorods and their enhanced ethanol-sensing properties

Abstract Silver (Ag) nanoparticles decorated zinc oxide (ZnO) nanorods were synthesized by a simple hydrothermal treatment for enhancing gas-sensing performance toward ethanol. The X-ray diffraction (XRD) and energy dispersive X-ray spectroscopic (EDS) results indicate the presence of Ag nanoparticles. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results reveal that Ag nanoparticles are tightly anchored on the surface of ZnO nanorods. The UV–vis diffuse reflectance spectroscopy (UV–vis DRS) results confirm that the band gap energy is decreased due to the decoration of Ag. The gas sensing performance of as-synthesized materials was investigated at different working temperatures and toward various ethanol concentrations. The gas-sensing results exhibit that the 1 wt% Ag/ZnO sensor shows the highest sensitivity of 389.6 toward 800 ppm ethanol and fast response among all the sensors. The improved response of Ag/ZnO sensors is ascribed to the catalysis and spillover effect of Ag. This result makes Ag/ZnO sensor a very promising gas sensing material for gas detection.

[1]  Zafar Hussain Ibupoto,et al.  Hydrothermal Growth of Vertically Aligned ZnO Nanorods Using a Biocomposite Seed Layer of ZnO Nanoparticles , 2013, Materials.

[2]  Arockia Jayalatha Kulandaisamy,et al.  Room temperature ammonia sensing properties of ZnO thin films grown by spray pyrolysis: Effect of Mg doping , 2016 .

[3]  M. Al‐Assiri,et al.  A sensitive and selective amperometric hydrazine sensor based on mesoporous Au/ZnO nanocomposites , 2016 .

[4]  K. Anand,et al.  Hydrogen sensor based on graphene/ZnO nanocomposite , 2014 .

[5]  Teng Fei,et al.  Toluene and ethanol sensing performances of pristine and PdO-decorated flower-like ZnO structures , 2013 .

[6]  M. Willander,et al.  A potentiometric immunosensor based on silver nanoparticles decorated ZnO nanotubes, for the selective detection of d-dimer , 2013 .

[7]  G. Lu,et al.  Design of Au@ZnO yolk-shell nanospheres with enhanced gas sensing properties. , 2014, ACS applied materials & interfaces.

[8]  B. P. Dhonge,et al.  Improved sensitivity and selectivity of pristine zinc oxide nanostructures to H2S gas: Detailed study on the synthesis reaction time , 2016 .

[9]  Rakesh K. Joshi,et al.  Au Decorated Zinc Oxide Nanowires for CO Sensing , 2009 .

[10]  Yongming Zhang,et al.  Au Nanoparticle Modified WO3 Nanorods with Their Enhanced Properties for Photocatalysis and Gas Sensing , 2010 .

[11]  Jinchai Li,et al.  Controlled synthesis of ZnO hollow microspheres via precursor-template method and its gas sensing property , 2012 .

[12]  Shuyi Ma,et al.  Preparation of Yb-doped SnO2 hollow nanofibers with an enhanced ethanol–gas sensing performance by electrospinning , 2015 .

[13]  Donats Erts,et al.  Tuning of ZnO 1D nanostructures by atomic layer deposition and electrospinning for optical gas sensor applications , 2015, Nanotechnology.

[14]  M. Ghoranneviss,et al.  Growth, characterization, and investigation of H2 gas sensing performance of Al-doped ZnO thin films synthesized by plasma focus device , 2016, Journal of Materials Science: Materials in Electronics.

[15]  XiaoSong Du,et al.  ZnO Nanoparticles/Reduced Graphene Oxide Bilayer Thin Films for Improved NH3-Sensing Performances at Room Temperature , 2016, Nanoscale Research Letters.

[16]  Yeon-Tae Yu,et al.  Solvothermal synthesis of ZnO nanostructures and their morphology-dependent gas-sensing properties. , 2013, ACS applied materials & interfaces.

[17]  M. Sadjadi,et al.  Synthesis and Characterization of ZnO-SiO2/Epoxy Nanocomposite Coating by Sol-Gel Process , 2012 .

[18]  Bingquan Wang,et al.  Facile Fabrication of Bi2WO6/Ag2S Heterostructure with Enhanced Visible-Light-Driven Photocatalytic Performances , 2016, Nanoscale Research Letters.

[19]  Jing Guo,et al.  ZnO enhanced NiO-based gas sensors towards ethanol , 2017 .

[20]  R. N. Bulakhe,et al.  Au sensitized ZnO nanorods for enhanced liquefied petroleum gas sensing properties , 2016 .

[21]  Yingmin Yu,et al.  Synthesis, photocatalytic activity, and photogenerated hydroxyl radicals of monodisperse colloidal ZnO nanospheres , 2015 .

[22]  J. Kim,et al.  A selective ethanol gas sensor based on spray-derived Ag–ZnO thin films , 2013, Journal of Materials Science.

[23]  Xin Wang,et al.  Synthesis of ZnO–Ag Hybrids and Their Gas-Sensing Performance toward Ethanol , 2015 .

[24]  Ziyu Zhang,et al.  The effect microstructure on the gas properties of Ag doped zinc oxide sensors: Spheres and sea-urchin-like nanostructures , 2016 .

[25]  Gwiy-Sang Chung,et al.  Acetylene gas sensing properties of an Ag-loaded hierarchical ZnO nanostructure-decorated reduced graphene oxide hybrid , 2015 .

[26]  Hao Wu,et al.  Ag-decorated ultra-thin porous single-crystalline ZnO nanosheets prepared by sunlight induced solvent reduction and their highly sensitive detection of ethanol , 2015 .

[27]  Nay Ming Huang,et al.  Optical and electrical properties of p-type Ag- doped ZnO nanostructures , 2014 .

[28]  Zhidong Lin,et al.  Hydrothermal synthesis of hierarchically porous Rh-doped ZnO and its high gas sensing performance to acetone , 2016, Journal of Materials Science: Materials in Electronics.

[29]  M. Willander,et al.  Fabrication of Well-Aligned ZnO Nanorods Using a Composite Seed Layer of ZnO Nanoparticles and Chitosan Polymer , 2013, Materials.

[30]  Mingbo Wu,et al.  Synthesis mechanism, enhanced visible-light-photocatalytic properties, and photogenerated hydroxyl radicals of PS@CdS core–shell nanohybrids , 2014, Journal of Nanoparticle Research.

[31]  Zhijie Shi,et al.  Gamma ray irradiated AgFeO 2 nanoparticles with enhanced gas sensor properties , 2014 .

[32]  Peng Sun,et al.  Facile synthesis and gas sensing properties of the flower-like NiO-decorated ZnO microstructures , 2016 .

[33]  Anurat Wisitsoraat,et al.  Acetylene sensor based on Pt/ZnO thick films as prepared by flame spray pyrolysis , 2011 .

[34]  Yanhong Lin,et al.  Study on photoelectric gas-sensing property and photogenerated carrier behavior of Ag–ZnO at the room temperature , 2013 .

[35]  Shuying Cheng,et al.  Ethanol gas sensor based on Al-doped ZnO nanomaterial with many gas diffusing channels , 2009 .

[36]  Yeon-Tae Yu,et al.  The role of gold catalyst on the sensing behavior of ZnO nanorods for CO and NO2 gases , 2012 .

[37]  Tianye Yang,et al.  Enhanced HCHO gas sensing properties by Ag-loaded sunflower-like In2O3 hierarchical nanostructures , 2014 .

[38]  O. Ntwaeaborwa,et al.  Highly selective NH3 gas sensor based on Au loaded ZnO nanostructures prepared using microwave-assisted method. , 2016, Journal of colloid and interface science.

[39]  Jae-Hun Kim,et al.  MOF-Based Membrane Encapsulated ZnO Nanowires for Enhanced Gas Sensor Selectivity. , 2016, ACS applied materials & interfaces.

[40]  Yan Li,et al.  Enhanced acetone-sensing performance of Au/ZnO hybrids synthesized using a solution combustion method , 2015, Electronic Materials Letters.

[41]  Yuan Zhang,et al.  Ag nanoparticle embedded-ZnO nanorods synthesized via a photochemical method and its gas-sensing properties , 2010 .

[42]  Feng Liu,et al.  Fabrication and gas sensing properties of hollow core–shell SnO2/α-Fe2O3 heterogeneous structures , 2014 .

[43]  A. K. Tyagi,et al.  Rapid synthesis and characterization of hybrid ZnO@Au core-shell nanorods for high performance, low temperature NO 2 gas sensor applications , 2015 .