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Deb M, Lu CJ, Zan HW. Achieving Room-Temperature ppb-Level H 2S Detection in a Au-SnO 2 Sensor with Low Voltage Enhancement Effect. ACS Sens 2024; 9:4568-4577. [PMID: 38754006 DOI: 10.1021/acssensors.4c00105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Although semiconductor metal oxide-based sensors are promising for gas sensing, low-power and room temperature operation (24 ± 1 °C) remains desirable for practical applications particularly considering the request of energy saving or net zero emission. In this study, we demonstrate a Au/SnO2-based ultrasensitive H2S gas sensor with a limit of detection (LOD) of 2 ppb, operating at very low voltages (0.05 to 0.5 V) at room temperature. The Au/SnO2-based sensor showed approximately 7 times higher response (the ratio of change in the current to initial current) of ∼270% and 4 times faster recovery (126 s) compared to the pure SnO2-based sensor when exposed to 500 ppb H2S gas concentration at 0.5 V operating voltage at relative humidity (RH) 17.5 ± 2.5%. The enhancement can be attributed to the catalytic characteristics of AuNPs, increasing the number of adsorbed oxygen species on sensing material surfaces. Additionally, AuNPs aid in forming flower-petal-like Au/SnO2 nanostructures, offering a larger surface area and more active sites for H2S sensing. Moreover, at low voltage (<1 V), the localized dipoles at the Au/SnO2 interface may further enhance the absorption of polar oxygen molecules and hence promote the reaction between H2S and oxygen species. This low-power, ultrasensitive H2S sensor outperforms high-powered alternatives, making it ideal for environmental, food safety, and healthcare applications.
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Affiliation(s)
- Moumita Deb
- Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, 1001, Ta Hsueh Rd, Hsinchu 300, Taiwan
- Department of Photonics, College of Electrical and Computer Engineering, National Chiao Tung University, 1001, Ta Hsueh Rd, Hsinchu 300, Taiwan
| | - Chia-Jung Lu
- Department of Chemistry, National Taiwan Normal University, 162, Heping East Rd., Section 1, Taipei 11677, Taiwan
| | - Hsiao-Wen Zan
- Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, 1001, Ta Hsueh Rd, Hsinchu 300, Taiwan
- Department of Photonics, College of Electrical and Computer Engineering, National Chiao Tung University, 1001, Ta Hsueh Rd, Hsinchu 300, Taiwan
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2
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Dutta T, Noushin T, Tabassum S, Mishra SK. Road Map of Semiconductor Metal-Oxide-Based Sensors: A Review. SENSORS (BASEL, SWITZERLAND) 2023; 23:6849. [PMID: 37571634 PMCID: PMC10422562 DOI: 10.3390/s23156849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/22/2023] [Accepted: 07/19/2023] [Indexed: 08/13/2023]
Abstract
Identifying disease biomarkers and detecting hazardous, explosive, flammable, and polluting gases and chemicals with extremely sensitive and selective sensor devices remains a challenging and time-consuming research challenge. Due to their exceptional characteristics, semiconducting metal oxides (SMOxs) have received a lot of attention in terms of the development of various types of sensors in recent years. The key performance indicators of SMOx-based sensors are their sensitivity, selectivity, recovery time, and steady response over time. SMOx-based sensors are discussed in this review based on their different properties. Surface properties of the functional material, such as its (nano)structure, morphology, and crystallinity, greatly influence sensor performance. A few examples of the complicated and poorly understood processes involved in SMOx sensing systems are adsorption and chemisorption, charge transfers, and oxygen migration. The future prospects of SMOx-based gas sensors, chemical sensors, and biological sensors are also discussed.
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Affiliation(s)
- Taposhree Dutta
- Department of Chemistry, IIEST Shibpur, Howrah 711103, West Bengal, India;
| | - Tanzila Noushin
- Department of Electrical and Computer Engineering, The University of Texas at Dallas, Richardson, TX 75080, USA;
| | - Shawana Tabassum
- Department of Electrical Engineering, The University of Texas at Tyler, Tyler, TX 75799, USA;
| | - Satyendra K. Mishra
- Danish Offshore Technology Center, Technical University of Denmark, 2800 Lyngby, Denmark
- SRCOM, Centre Technologic de Telecomunicacions de Catalunya, 08860 Castelldefels, Barcelona, Spain
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3
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Singh PDD, Murthy Z, Kumar Kailasa S. Metal nitrides nanostructures: Properties, synthesis and conceptualization in analytical methods developments for chemical analysis and separation, and in energy storage applications. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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4
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Candy-like heterojunction nanocomposite of WO 3/Fe 2O 3-based semiconductor gas sensor for the detection of triethylamine. Mikrochim Acta 2023; 190:139. [PMID: 36930336 DOI: 10.1007/s00604-023-05699-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 02/23/2023] [Indexed: 03/18/2023]
Abstract
A highly efficient gas sensor for the detection of triethylamine based on candy-like WO3/Fe2O3 nanocomposite was prepared. The control of morphology and sensing performance of n-n heterojunction WO3/Fe2O3 nanocomposites were successfully achieved by the modulation of Fe element content. When the ratio of Fe to W is 0.4, the candy-like nanocomposite of WO3/Fe2O3 with great performance is obtained. It is interesting that the candy-like nanocomposite of WO3/Fe2O3 with a large specific surface area exhibits better selectivity and sensitivity for sensing TEA gases at a lower operating temperature (260 °C) compared with the gas sensor prepared by using WO3 alone. To verify the feasibility, the sensing mechanism was investigated and real sample tests were conducted and discussed. Finally, a TEA gas sensor with low limit of detection, short response/recovery time (15/162 s), and high sensitivity was developed. In addition, the prepared gas sensor has satisfactory stability and selectivity and has practical application value.
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5
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Liu S, Yang W, Liu L, Chen H, Liu Y. Enhanced H 2S Gas-Sensing Performance of Ni-Doped ZnO Nanowire Arrays. ACS OMEGA 2023; 8:7595-7601. [PMID: 36873010 PMCID: PMC9979365 DOI: 10.1021/acsomega.2c07092] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Ni-doped ZnO nanowire arrays (Ni-ZnO NRs) with different Ni concentrations are grown on etched fluorine-doped tin oxide electrodes by the hydrothermal method. The Ni-ZnO NRs with a nickel precursor concentration of 0-12 at. % are adjusted to improve the selectivity and response of the devices. The NRs' morphology and microstructure are investigated by scanning electron microscopy and high-resolution transmission electron microscopy. The sensitive property of the Ni-ZnO NRs is measured. It is found that the Ni-ZnO NRs with an 8 at. % Ni precursor concentration have high selectivity for H2S and a large response of 68.9 at 250 °C compared to other gases including ethanol, acetone, toluene, and nitrogen dioxide. Their response/recovery time is 75/54 s. The sensing mechanism is discussed in terms of doping concentration, optimum operating temperature, gas type, and gas concentration. The enhanced performance is related to the regularity degree of the array and the doped Ni3+ and Ni2+ ions, which increases the active sites for oxygen and target gas adsorption on the surface.
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Affiliation(s)
- Shaoyu Liu
- Yunnan
Key Laboratory of Opto-electronic Information Technology, Yunnan Normal University, Kunming 650500, China
- Institute
of Physics and Electronic Information, Yunnan
Normal University, Kunming 650500, China
| | - Weiye Yang
- Yunnan
Key Laboratory of Opto-electronic Information Technology, Yunnan Normal University, Kunming 650500, China
- Institute
of Physics and Electronic Information, Yunnan
Normal University, Kunming 650500, China
| | - Lei Liu
- Yunnan
Key Laboratory of Opto-electronic Information Technology, Yunnan Normal University, Kunming 650500, China
- Institute
of Physics and Electronic Information, Yunnan
Normal University, Kunming 650500, China
| | - Huohuo Chen
- Yunnan
Key Laboratory of Opto-electronic Information Technology, Yunnan Normal University, Kunming 650500, China
- Institute
of Physics and Electronic Information, Yunnan
Normal University, Kunming 650500, China
| | - Yingkai Liu
- Yunnan
Key Laboratory of Opto-electronic Information Technology, Yunnan Normal University, Kunming 650500, China
- Institute
of Physics and Electronic Information, Yunnan
Normal University, Kunming 650500, China
- Key
Laboratory of Advanced Technique & Preparation for Renewable Energy
Materials, Ministry of Education, Yunnan
Normal University, Kunming 650500, China
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6
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Paolucci V, De Santis J, Ricci V, Lozzi L, Giorgi G, Cantalini C. Bidimensional Engineered Amorphous a-SnO 2 Interfaces: Synthesis and Gas Sensing Response to H 2S and Humidity. ACS Sens 2022; 7:2058-2068. [PMID: 35757893 PMCID: PMC9315963 DOI: 10.1021/acssensors.2c00887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two-dimensional (2D) transition metal dichalcogenides (TMDs) and metal chalcogenides (MCs), despite their excellent gas sensing properties, are subjected to spontaneous oxidation in ambient air, negatively affecting the sensor's signal reproducibility in the long run. Taking advantage of spontaneous oxidation, we synthesized fully amorphous a-SnO2 2D flakes (≈30 nm thick) by annealing in air 2D SnSe2 for two weeks at temperatures below the crystallization temperature of SnO2 (T < 280 °C). These engineered a-SnO2 interfaces, preserving all the precursor's 2D surface-to-volume features, are stable in dry/wet air up to 250 °C, with excellent baseline and sensor's signal reproducibility to H2S (400 ppb to 1.5 ppm) and humidity (10-80% relative humidity (RH)) at 100 °C for one year. Specifically, by combined density functional theory and ab initio molecular dynamics, we demonstrated that H2S and H2O compete by dissociative chemisorption over the same a-SnO2 adsorption sites, disclosing the humidity cross-response to H2S sensing. Tests confirmed that humidity decreases the baseline resistance, hampers the H2S sensor's signal (i.e., relative response (RR) = Ra/Rg), and increases the limit of detection (LOD). At 1 ppm, the H2S sensor's signal decreases from an RR of 2.4 ± 0.1 at 0% RH to 1.9 ± 0.1 at 80% RH, while the LOD increases from 210 to 380 ppb. Utilizing a suitable thermal treatment, here, we report an amorphization procedure that can be easily extended to a large variety of TMDs and MCs, opening extraordinary applications for 2D layered amorphous metal oxide gas sensors.
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Affiliation(s)
- Valentina Paolucci
- Department of Industrial and Information Engineering and Economics, University of L'Aquila and UdR INSTM of L'Aquila, Via G. Gronchi 18, I-67100 L'Aquila, Italy
| | - Jessica De Santis
- Department of Industrial and Information Engineering and Economics, University of L'Aquila and UdR INSTM of L'Aquila, Via G. Gronchi 18, I-67100 L'Aquila, Italy
| | - Vittorio Ricci
- Department of Industrial and Information Engineering and Economics, University of L'Aquila and UdR INSTM of L'Aquila, Via G. Gronchi 18, I-67100 L'Aquila, Italy
| | - Luca Lozzi
- Department of Physical and Chemical Sciences, University of L'Aquila, via Vetoio, 67100 L'Aquila (AQ), Italy
| | - Giacomo Giorgi
- Department of Civil & Environmental Engineering (DICA), Università degli Studi di Perugia, Via G. Duranti 93, 06125 Perugia, Italy.,CNR-SCITEC, 06123 Perugia, Italy
| | - Carlo Cantalini
- Department of Industrial and Information Engineering and Economics, University of L'Aquila and UdR INSTM of L'Aquila, Via G. Gronchi 18, I-67100 L'Aquila, Italy
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7
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Conductive Polymer Composites for Hydrogen Sulphide Sensors Working at Sub-PPM Level and Room Temperature. SENSORS 2021; 21:s21196529. [PMID: 34640849 PMCID: PMC8512851 DOI: 10.3390/s21196529] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 11/17/2022]
Abstract
Hybrid composites based on tin chloride and the conductive polymers, polyaniline (PAni) and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), were integrated into high-performance hydrogen sulphide (H2S) gas sensors working at room temperature. The morphology and chemical properties were studied by scanning and transmission electron microscopy (SEM, TEM), energy dispersive spectroscopy (EDS) and Fourier-transform infrared (FTIR). The composites demonstrated a slightly porous nanostructure and strong interactions between the polymers and the metal salt, which slightly dopes PAni. The hybrid sensors exhibited a very low detection limit (<85 ppb), fast response, repeatability, reproducibility and stability over one month. Moreover, this work presents how calibration based on the derivative of the signal can give hybrid sensors the ability to quantify the concentration of targeted gas, even during continuous variation of the analyte concentration. Finally, the effect of interfering species, such as water and ammonia, is discussed.
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8
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Kaiser A, Torres Ceja E, Liu Y, Huber F, Müller R, Herr U, Thonke K. H 2S sensing for breath analysis with Au functionalized ZnO nanowires. NANOTECHNOLOGY 2021; 32:205505. [PMID: 33498025 DOI: 10.1088/1361-6528/abe004] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This work presents a H2S selective resistive gas sensor design based on a chemical field effect transistor (ChemFET) with open gate formed by hundreds of high temperature chemical vapour deposition (CVD) grown zinc oxide nanowires (ZnO NW). The sensing ability of pristine ZnO NWs and surface functionalized ZnO NWs for H2S is analysed systematically. ZnO NWs are functionalized by deposition of discontinuous gold (Au) nanoparticle films of different thicknesses of catalyst layer ranging from 1 to 10 nm and are compared in their gas sensing properties. All experiments were performed in a temperature stabilized small volume compartment with adjustable gas mixture at room temperature. The results allow for a well-founded understanding of signal-to-noise ratio, enhanced response, and improved limit of detection due to the Au functionalisation. Comprehension and controlled application of the beneficial effects of Au catalyst on ZnO NWs allow for the detection of very low H2S concentrations down to 10 ppb, and a theoretically estimated 500 ppt in synthetic air at room temperature.
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Affiliation(s)
- Angelika Kaiser
- Institute of Quantum Matter/Semiconductor Physics Group, Ulm University, D-89069 Ulm, Germany
| | - Erick Torres Ceja
- Institute of Quantum Matter/Semiconductor Physics Group, Ulm University, D-89069 Ulm, Germany
| | - Yujia Liu
- Institute of Quantum Matter/Semiconductor Physics Group, Ulm University, D-89069 Ulm, Germany
| | - Florian Huber
- Institute of Quantum Matter/Semiconductor Physics Group, Ulm University, D-89069 Ulm, Germany
| | - Raphael Müller
- Institute of Quantum Matter/Semiconductor Physics Group, Ulm University, D-89069 Ulm, Germany
| | - Ulrich Herr
- Institute of Functional Nanosystems, Ulm University, D-89069 Ulm, Germany
| | - Klaus Thonke
- Institute of Quantum Matter/Semiconductor Physics Group, Ulm University, D-89069 Ulm, Germany
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9
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Abstract
In this work, a lettuce-like ZnO gas sensor with high sensitivity for H2S detection was successfully fabricated by a one-step hydrothermal method. Characterization analysis of the phases, crystallinities, morphology, and chemical compositions indicated that lettuce-like ZnO has a lettuce-like microsphere structure composed of wurtzite hexagonal ZnO sheets. A gas sensitivity test of the lettuce-like ZnO showed that the sensor had a high H2S response (113.04 for 100 ppm H2S) and H2S selectivity. The lettuce-like ZnO sensor has fast response characteristics while maintaining high sensitivity, and has a response time as low as 15 seconds and a recovery time of 90 seconds, and the detection limit reaches 1 ppm. The sensitive mechanism of lettuce-like ZnO sensor to H2S is also discussed.
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10
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Mirzaei A, Kim SS, Kim HW. Resistance-based H 2S gas sensors using metal oxide nanostructures: A review of recent advances. JOURNAL OF HAZARDOUS MATERIALS 2018; 357:314-331. [PMID: 29902726 DOI: 10.1016/j.jhazmat.2018.06.015] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 04/27/2018] [Accepted: 06/05/2018] [Indexed: 05/28/2023]
Abstract
Gas sensors play an undeniable role in most fields of technology in the modern world; they are broadly used for public safety, pollution monitoring, quality control, breath analysis, smart homes and automobiles, and so on. Due to their low cost, high sensitivity, compact size, online detection, ease of use, portability, and low power consumption, metal oxide (MO) gas sensors have exceptional potential for detection of more than 150 gases. This paper reviews the current state-of-the-art H2S conductometric MO gas sensors. In the first part, the H2S sensing mechanism for MOs is presented in detail. In the next part, the H2S sensing characteristics of the different MOs are presented, focusing on strategies such as metal doping, heterojunction composites, and different morphologies that are applied to enhance their sensing characteristics. In general, CuO, ZnO, and SnO2 show the highest sensitivity to H2S; therefore, most of this review is dedicated to these oxides. In the last part, some unusual and emerging MOs for H2S sensing are presented.
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Affiliation(s)
- Ali Mirzaei
- The Research Institute of Industrial Science, Hanyang University, Seoul 133-791, Republic of Korea; Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz, Iran
| | - Sang Sub Kim
- Department of Materials Science and Engineering, Inha University, Incheon 402-751, Republic of Korea.
| | - Hyoun Woo Kim
- The Research Institute of Industrial Science, Hanyang University, Seoul 133-791, Republic of Korea; Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
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11
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Rumyantseva M, Makeeva E, Gaskov A, Shepel N, Peregudova S, Khoroshutin A, Tokarev S, Fedorova O. H₂S Sensing by Hybrids Based on Nanocrystalline SnO₂ Functionalized with Cu(II) Organometallic Complexes: The Role of the Ligand Platform. NANOMATERIALS 2017; 7:nano7110384. [PMID: 29120409 PMCID: PMC5707601 DOI: 10.3390/nano7110384] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 10/24/2017] [Accepted: 11/06/2017] [Indexed: 11/26/2022]
Abstract
This paper deals with the functionalization of nanocrystalline SnO2 with Cu(II) complexes with organic ligands, aimed at the improvement of sensor selectivity towards gas molecules. For the synthesis of metalorganic/SnO2 hybrid material complexes of Cu(II) with phthalocyanine, porphyrinines, bipyridine and azadithiacrown etherwere used. The analysis of gas sensor properties showed the possibility of increasing the sensitivity and selectivity of hybrid materials in H2S detection due to the electron transfer from SnO2 to an adsorbed organic molecule, which changes during the interaction between H2S and Cu(II) ions.
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Affiliation(s)
| | - Ekaterina Makeeva
- Faculty of Chemistry, Moscow State University, 119991 Moscow, Russia.
| | - Alexander Gaskov
- Faculty of Chemistry, Moscow State University, 119991 Moscow, Russia.
| | - Nikolay Shepel
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119991 Moscow, Russia.
| | - Svetlana Peregudova
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119991 Moscow, Russia.
| | | | - Sergey Tokarev
- Faculty of Chemistry, Moscow State University, 119991 Moscow, Russia.
| | - Olga Fedorova
- Faculty of Chemistry, Moscow State University, 119991 Moscow, Russia.
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119991 Moscow, Russia.
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12
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Liu X, Du B, Sun Y, Yu M, Yin Y, Tang W, Chen C, Sun L, Yang B, Cao W, Ashfold MNR. Sensitive Room Temperature Photoluminescence-Based Sensing of H2S with Novel CuO-ZnO Nanorods. ACS APPLIED MATERIALS & INTERFACES 2016; 8:16379-85. [PMID: 27258907 DOI: 10.1021/acsami.6b02455] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Novel CuO nanoparticle-capped ZnO nanorods have been produced using a pulsed laser deposition (PLD) method. These nanorods are shown to grow by a CuO-nanoparticle-assisted vapor-solid-solid (V-S-S) mechanism. The photoluminescence (PL) accompanying ultraviolet illumination of these capped nanorod samples shows large variations upon exposure to trace quantities of H2S gas. The present data suggest that both the Cu-doped ZnO stem and the CuO capping nanoparticle contribute to optical H2S sensing with these CuO-ZnO nanorods. This study represents the first demonstration of PL-based H2S gas sensing, at room temperature, with sub-ppm sensitivity. It also opens the way to producing CuO-ZnO nanorods by a V-S-S mechanism using gas-phase methods other than PLD.
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Affiliation(s)
- Xiao Liu
- Condensed Matter Science and Technology Institute, School of Science, Harbin Institute of Technology , Harbin 150080, China
| | - Baosheng Du
- Condensed Matter Science and Technology Institute, School of Science, Harbin Institute of Technology , Harbin 150080, China
| | - Ye Sun
- Condensed Matter Science and Technology Institute, School of Science, Harbin Institute of Technology , Harbin 150080, China
| | - Miao Yu
- State Key Laboratory of Urban Water Resource and Environment, School of Chemical Engineering and Technology, Harbin Institute of Technology , Harbin 150001, China
| | - Yongqi Yin
- Condensed Matter Science and Technology Institute, School of Science, Harbin Institute of Technology , Harbin 150080, China
| | - Wei Tang
- Condensed Matter Science and Technology Institute, School of Science, Harbin Institute of Technology , Harbin 150080, China
| | - Chong Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Chemical Engineering and Technology, Harbin Institute of Technology , Harbin 150001, China
| | - Lei Sun
- State Key Laboratory of Urban Water Resource and Environment, School of Chemical Engineering and Technology, Harbin Institute of Technology , Harbin 150001, China
| | - Bin Yang
- Condensed Matter Science and Technology Institute, School of Science, Harbin Institute of Technology , Harbin 150080, China
| | - Wenwu Cao
- Condensed Matter Science and Technology Institute, School of Science, Harbin Institute of Technology , Harbin 150080, China
- Department of Mathematics and Materials Research Institute, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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13
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Vuong NM, Chinh ND, Huy BT, Lee YI. CuO-Decorated ZnO Hierarchical Nanostructures as Efficient and Established Sensing Materials for H2S Gas Sensors. Sci Rep 2016; 6:26736. [PMID: 27231026 PMCID: PMC4882619 DOI: 10.1038/srep26736] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 05/06/2016] [Indexed: 12/25/2022] Open
Abstract
Highly sensitive hydrogen sulfide (H2S) gas sensors were developed from CuO-decorated ZnO semiconducting hierarchical nanostructures. The ZnO hierarchical nanostructure was fabricated by an electrospinning method following hydrothermal and heat treatment. CuO decoration of ZnO hierarchical structures was carried out by a wet method. The H2S gas-sensing properties were examined at different working temperatures using various quantities of CuO as the variable. CuO decoration of the ZnO hierarchical structure was observed to promote sensitivity for H2S gas higher than 30 times at low working temperature (200 °C) compared with that in the nondecorated hierarchical structure. The sensing mechanism of the hybrid sensor structure is also discussed. The morphology and characteristics of the samples were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis absorption, photoluminescence (PL), and electrical measurements.
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Affiliation(s)
- Nguyen Minh Vuong
- Department of Chemistry, Changwon National University, Changwon 641-773, Republic of Korea
- Department of Physics, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Binh Dinh, Vietnam
| | - Nguyen Duc Chinh
- Department of Materials Science and Engineering, Chungnam National University, Daejeon, 305-764, Republic of Korea
| | - Bui The Huy
- Department of Chemistry, Changwon National University, Changwon 641-773, Republic of Korea
| | - Yong-Ill Lee
- Department of Chemistry, Changwon National University, Changwon 641-773, Republic of Korea
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14
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Kumar A, Sanger A, Kumar A, Chandra R. Highly sensitive and selective CO gas sensor based on a hydrophobic SnO2/CuO bilayer. RSC Adv 2016. [DOI: 10.1039/c6ra06538d] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CO gas sensing mechanism of SnO2/CuO bilayer sensor.
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Affiliation(s)
- Arvind Kumar
- Nanoscience Laboratory
- Institute Instrumentation Centre
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Amit Sanger
- Nanoscience Laboratory
- Institute Instrumentation Centre
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Ashwani Kumar
- Nanoscience Laboratory
- Institute Instrumentation Centre
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Ramesh Chandra
- Nanoscience Laboratory
- Institute Instrumentation Centre
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
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