Excellent detection of H2S gas at ppb concentrations using ZnFe2O4 nanofibers loaded with reduced graphene oxide

Abstract Cost-effective fabrication of sensors and detection of ultralow concentrations of toxic gases are important concerns for environmental monitoring. In this study, the reduced graphene oxide (RGO)-loaded ZnFe2O4 nanofibers (ZFO-NFs) were fabricated by facile on-chip electrospinning method and subsequent heat treatment. The multi-porous NFs with single-phase cubic spinel structure and typical spider-net morphology were directly assembled on Pt-interdigitated electrodes. The diameters of the RGO-loaded ZFO-NFs were approximately 50–100 nm with many nanograins. The responses to H2S gas showed a bell-shaped behaviour with respect to RGO contents and annealing temperatures. The optimal values of the RGO contents and the annealing temperatures were found to be about 1.0 wt% and 600 °C, respectively. The response of the RGO-loaded ZnFe2O4 NFs to 1 ppm H2S gas was as high as 147 at 350°C while their cross-gas responses to SO2 (10 ppm), NH3 (100 ppm), H2 (250 ppm), C3H6O (1000 ppm), and C2H5OH (1000 ppm) were rather low (1.8−5.6). The high sensor response was attributed to formation of a heterojunction between RGO and ZnFe2O4 and due to the fact that NFs consisted of many nanograins which resulted in multi-porous structure and formation of potential barriers at grain boundaries.

[1]  S. Aștilean,et al.  A new green, ascorbic acid-assisted method for versatile synthesis of Au–graphene hybrids as efficient surface-enhanced Raman scattering platforms , 2013 .

[2]  Jiali Zhang,et al.  Reduction of graphene oxide via L-ascorbic acid. , 2010, Chemical communications.

[3]  S. Ramakrishna,et al.  Nanostructured ceramics by electrospinning , 2007 .

[4]  G. Zeng,et al.  Metal oxides and metal salt nanostructures for hydrogen sulfide sensing: mechanism and sensing performance , 2015 .

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

[6]  C. Reddy,et al.  Preparation and characterization of ferrites as gas sensor materials , 2000 .

[7]  L. Currie.  Nomenclature in evaluation of analytical methods including detection and quantification capabilities1Adapted from the International Union of Pure and Applied Chemistry (IUPAC) document “Nomenclature in Evaluation of Analytical Methods including Detection and Quantification Capabilities”, which origi , 1999 .

[8]  J. Robertson,et al.  Interpretation of Raman spectra of disordered and amorphous carbon , 2000 .

[9]  Zain Ul Abideen,et al.  Graphene-loaded tin oxide nanofibers: optimization and sensing performance , 2017, Nanotechnology.

[10]  Peng Sun,et al.  Enhanced gas sensing properties to acetone vapor achieved by α-Fe2O3 particles ameliorated with reduced graphene oxide sheets , 2017 .

[11]  G. Lyon.  Al , 2014 .

[12]  Ying Huang,et al.  One-pot hydrothermal synthesis of RGO/CoFe2O4 composite and its excellent microwave absorption properties , 2014 .

[13]  Jae-Hun Kim,et al.  Excellent gas detection of ZnO nanofibers by loading with reduced graphene oxide nanosheets , 2015 .

[14]  Kea-Tiong Tang,et al.  A review of sensor-based methods for monitoring hydrogen sulfide , 2012 .

[15]  S. S. Kim,et al.  Competitive influence of grain size and crystallinity on gas sensing performances of ZnO nanofibers , 2013 .

[16]  Rujia Zou,et al.  ZnO nanorods on reduced graphene sheets with excellent field emission, gas sensor and photocatalytic properties , 2013 .

[17]  S. Ruan,et al.  Reduced graphene oxide/α-Fe2O3 hybrid nanocomposites for room temperature NO2 sensing , 2017 .

[18]  Zain Ul Abideen,et al.  An ultra-sensitive hydrogen gas sensor using reduced graphene oxide-loaded ZnO nanofibers. , 2015, Chemical communications.

[19]  Lloyd A. Currie,et al.  Nomenclature in evaluation of analytical methods including detection and quantification capabilities1: (IUPAC Recommendations 1995) , 1999 .

[20]  T. Hu,et al.  Trimethylamine sensing properties of graphene quantum Dots/α-Fe 2 O 3 composites , 2016 .

[21]  Hyoyoung Lee,et al.  One-pot reduction of graphene oxide at subzero temperatures. , 2011, Chemical communications.

[22]  A. Asiri,et al.  Highly sensitive formaldehyde chemical sensor based on hydrothermally prepared spinel ZnFe2O4 nanorods , 2012 .

[23]  Jing Wang,et al.  Reduced graphene oxide (rGO) encapsulated Co3O4 composite nanofibers for highly selective ammonia sensors , 2016 .

[24]  K. Gross,et al.  Spinel ferrite oxide semiconductor gas sensors , 2016 .

[25]  N. Hoa,et al.  Facile on-chip electrospinning of ZnFe2O4 nanofiber sensors with excellent sensing performance to H2S down ppb level. , 2018, Journal of hazardous materials.

[26]  Min Fu,et al.  In situ fabrication and characterization of cobalt ferrite nanorods/graphene composites , 2013 .

[27]  K. Cen,et al.  Green preparation of reduced graphene oxide for sensing and energy storage applications , 2014, Scientific Reports.

[28]  Il-Doo Kim,et al.  Selective detection of acetone and hydrogen sulfide for the diagnosis of diabetes and halitosis using SnO(2) nanofibers functionalized with reduced graphene oxide nanosheets. , 2014, ACS applied materials & interfaces.

[29]  R. Jayavel,et al.  Synthesis and electrochemical properties of reduced graphene oxide via chemical reduction using thiourea as a reducing agent , 2013 .

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

[31]  Zhaoxiong Xie,et al.  Highly selective gas sensing properties of partially inversed spinel zinc ferrite towards H2S , 2016 .

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

[33]  Mark Voorneveld,et al.  Preparation , 2018, Games Econ. Behav..

[34]  Haisheng Wang,et al.  Novel rGO/α-Fe2O3 composite hydrogel: synthesis, characterization and high performance of electromagnetic wave absorption , 2013 .

[35]  G. Lu,et al.  Reduced graphene oxide/α-Fe2O3 composite nanofibers for application in gas sensors , 2017 .

[36]  S. S. Kim,et al.  Resistance-based H2S gas sensors using metal oxide nanostructures: A review of recent advances. , 2018, Journal of hazardous materials.

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

[38]  Jun Yan,et al.  An environmentally friendly and efficient route for the reduction of graphene oxide by aluminum powder , 2010 .

[39]  Ying Wang,et al.  Preparation, Structure, and Electrochemical Properties of Reduced Graphene Sheet Films , 2009 .

[40]  S. Stankovich,et al.  Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide , 2007 .

[41]  Adisorn Tuantranont,et al.  Electrolytically exfoliated graphene-loaded flame-made Ni-doped SnO2 composite film for acetone sensing. , 2015, ACS applied materials & interfaces.

[42]  Sun-Woo Choi,et al.  Growth kinetics of nanograins in SnO2 fibers and size dependent sensing properties , 2011 .

[43]  Qiang Li,et al.  A high efficiency H2S gas sensor material: paper like Fe2O3/graphene nanosheets and structural alignment dependency of device efficiency , 2014 .

[44]  H. Qiao,et al.  Electrospinning combined with hydrothermal synthesis and lithium storage properties of ZnFe2O4-graphene composite nanofibers , 2017 .

[45]  Rui Zhang,et al.  Improvement of NO2 gas sensing performance based on discoid tin oxide modified by reduced graphene oxide , 2016 .

[46]  L. A. Currie,et al.  Nomenclature in evaluation of analytical methods including detection and quantification capabilities (IUPAC Recommendations 1995) , 1995 .

[47]  Kian Ping Loh,et al.  Hydrothermal Dehydration for the “Green” Reduction of Exfoliated Graphene Oxide to Graphene and Demonstration of Tunable Optical Limiting Properties , 2009 .

[48]  J. Park,et al.  Growth behavior and sensing properties of nanograins in CuO nanofibers , 2011 .

[49]  S. S. Kim,et al.  Extraordinary improvement of gas-sensing performances in SnO2 nanofibers due to creation of local p-n heterojunctions by loading reduced graphene oxide nanosheets. , 2015, ACS applied materials & interfaces.

[50]  Feng Liu,et al.  Acetone gas sensors based on graphene-ZnFe2O4 composite prepared by solvothermal method , 2013 .

[51]  Amadou Ndiaye,et al.  Nanomaterials for the Selective Detection of Hydrogen Sulfide in Air , 2017, Sensors.

[52]  Chao Chen,et al.  Synthesis of MoO3/reduced graphene oxide hybrids and mechanism of enhancing H2S sensing performances , 2015 .