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Kelaidis N, Panayiotatos Y, Chroneos A. Chalcogen Doping in SnO 2: A DFT Investigation of Optical and Electronic Properties for Enhanced Photocatalytic Applications. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3910. [PMID: 39203087 PMCID: PMC11355804 DOI: 10.3390/ma17163910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Revised: 07/22/2024] [Accepted: 07/26/2024] [Indexed: 09/03/2024]
Abstract
Tin dioxide (SnO2) is an important transparent conductive oxide (TCO), highly desirable for its use in various technologies due to its earth abundance and non-toxicity. It is studied for applications such as photocatalysis, energy harvesting, energy storage, LEDs, and photovoltaics as an electron transport layer. Elemental doping has been an established method to tune its band gap, increase conductivity, passivate defects, etc. In this study, we apply density functional theory (DFT) calculations to examine the electronic and optical properties of SnO2 when doped with members of the oxygen family, namely S, Se, and Te. By calculating defect formation energies, we find that S doping is energetically favourable in the oxygen substitutional position, whereas Se and Te prefer the Sn substitutional site. We show that S and Se substitutional doping leads to near gap states and can be an effective way to reduce the band gap, which results in an increased absorbance in the optical part of the spectrum, leading to improved photocatalytic activity, whereas Te doping results in several mid-gap states.
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Affiliation(s)
- Nikolaos Kelaidis
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Vass. Constantinou 48, 11635 Athens, Greece
- Department of Mechanical Engineering, University of West Attica, 12241 Athens, Greece;
| | | | - Alexander Chroneos
- Department of Electrical and Computer Engineering, University of Thessaly, 38221 Volos, Greece
- Department of Materials, Imperial College, London SW7 2AZ, UK
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2
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Kuş E, Altındemir G, Bostan YK, Taşaltın C, Erol A, Wang Y, Sarcan F. A Dual-Channel MoS 2-Based Selective Gas Sensor for Volatile Organic Compounds. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:633. [PMID: 38607167 PMCID: PMC11013178 DOI: 10.3390/nano14070633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 03/28/2024] [Accepted: 04/02/2024] [Indexed: 04/13/2024]
Abstract
Significant progress has been made in two-dimensional material-based sensing devices over the past decade. Organic vapor sensors, particularly those using graphene and transition metal dichalcogenides as key components, have demonstrated excellent sensitivity. These sensors are highly active because all the atoms in the ultra-thin layers are exposed to volatile compounds. However, their selectivity needs improvement. We propose a novel gas-sensing device that addresses this challenge. It consists of two side-by-side sensors fabricated from the same active material, few-layer molybdenum disulfide (MoS₂), for detecting volatile organic compounds like alcohol, acetone, and toluene. To create a dual-channel sensor, we introduce a simple step into the conventional 2D material sensor fabrication process. This step involves treating one-half of the few-layer MoS₂ using ultraviolet-ozone (UV-O3) treatment. The responses of pristine few-layer MoS₂ sensors to 3000 ppm of ethanol, acetone, and toluene gases are 18%, 3.5%, and 49%, respectively. The UV-O3-treated few-layer MoS₂-based sensors show responses of 13.4%, 3.1%, and 6.7%, respectively. This dual-channel sensing device demonstrates a 7-fold improvement in selectivity for toluene gas against ethanol and acetone. Our work sheds light on understanding surface processes and interaction mechanisms at the interface between transition metal dichalcogenides and volatile organic compounds, leading to enhanced sensitivity and selectivity.
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Affiliation(s)
- Esra Kuş
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler, Istanbul 34134, Turkey; (E.K.); (Y.K.B.); (A.E.)
| | - Gülay Altındemir
- Materials Institute, TUBITAK Marmara Research Center, Gebze, Kocaeli 41470, Turkey; (G.A.); (C.T.)
| | - Yusuf Kerem Bostan
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler, Istanbul 34134, Turkey; (E.K.); (Y.K.B.); (A.E.)
| | - Cihat Taşaltın
- Materials Institute, TUBITAK Marmara Research Center, Gebze, Kocaeli 41470, Turkey; (G.A.); (C.T.)
| | - Ayse Erol
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler, Istanbul 34134, Turkey; (E.K.); (Y.K.B.); (A.E.)
| | - Yue Wang
- Department of Physics, School of Physics, Engineering and Technology, University of York, York YO10 5DD, UK
| | - Fahrettin Sarcan
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler, Istanbul 34134, Turkey; (E.K.); (Y.K.B.); (A.E.)
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Yang B, To DTH, Resendiz Mendoza E, Myung NV. Achieving One Part Per Billion Hydrogen Sulfide (H 2S) Level Detection through Optimizing Composition and Crystallinity of Gold-Decorated Tungsten Trioxide (Au-WO 3) Nanofibers. ACS Sens 2024; 9:292-304. [PMID: 38215726 DOI: 10.1021/acssensors.3c01979] [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: 01/14/2024]
Abstract
As a common environmental pollutant and an important breath biomarker for several diseases, it is essential to develop a hydrogen sulfide gas sensor with a low-ppb level detection limit to prevent harmful gas exposure and allow early diagnoses of diseases in low-resource settings. Gold doped/decorated tungsten trioxide (Au-WO3) nanofibers with various compositions and crystallinities were synthesized to optimize H2S-sensing performance. Systematically experimental results demonstrated the ability to detect 1 ppb H2S with a response value (Rair/Rgas) of 2.01 using a 5 at % Au-WO3 nanofibers with average grain sizes of around 15 nm. Additionally, energy barrier difference of sensing materials in air and nitrogen (ΔEb) and power law exponent (n) were determined to be 0.36 eV and 0.7, respectively, at 450 °C indicating that O- is predominately ionic oxygen species and adsorption of O- significantly altered the Schottky barrier between the grain. Such quantitative analysis provides a comprehensive understanding of H2S detection mechanism.
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Affiliation(s)
- Bingxin Yang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame 46556, Indiana, United States
| | - Dung Thi Hanh To
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame 46556, Indiana, United States
| | - Emily Resendiz Mendoza
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame 46556, Indiana, United States
| | - Nosang V Myung
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame 46556, Indiana, United States
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Ghadage P, Shinde KP, Nadargi D, Nadargi J, Shaikh H, Alam MA, Mulla I, Tamboli MS, Park JS, Suryavanshi S. Bismuth ferrite based acetone gas sensor: evaluation of graphene oxide loading. RSC Adv 2024; 14:1367-1376. [PMID: 38174272 PMCID: PMC10763655 DOI: 10.1039/d3ra06733e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024] Open
Abstract
We report a BiFeO3/graphene oxide (BFO/GO) perovskite, synthesized using a CTAB-functionalized glycine combustion route, as a potential material for acetone gas sensing applications. The physicochemical properties of the developed perovskite were analysed using XRD, FE-SEM, TEM, HRTEM, EDAX and XPS. The gas sensing performance was analysed for various test gases, including ethanol, acetone, propanol, ammonia, nitric acid, hydrogen sulphide and trimethylamine at a concentration of 500 ppm. Among the test gases, the developed BFO showed the best selectivity towards acetone, with a response of 61% at an operating temperature of 250 °C. All the GO-loaded BFO samples showed an improved gas sensing performance compared with pristine BFO in terms of sensitivity, the response/recovery times, the transient response curves and the stability. The 1 wt% GO-loaded BiFeO3 sensor showed the highest sensitivity of 89% towards acetone (500 ppm) at an operating temperature of 250 °C. These results show that the developed perovskites have significant potential for use in acetone gas sensing applications.
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Affiliation(s)
- Pandurang Ghadage
- School of Physical Sciences, Punyashlok Ahilyadevi Holkar Solapur University Solapur 413255 India
| | - K P Shinde
- Department of Materials Science and Engineering, Hanbat National University Daejeon 34158 South Korea
| | - Digambar Nadargi
- School of Physical Sciences, Punyashlok Ahilyadevi Holkar Solapur University Solapur 413255 India
- Centre for Materials for Electronics Technology, C-MET Thrissur 680581 India
| | - Jyoti Nadargi
- Department of Physics, Santosh Bhimrao Patil College Mandrup Solapur 413221 India
| | - Hamid Shaikh
- SABIC Polymer Research Centre, Department of Chemical Engineering, King Saud University P.O. Box 800 Riyadh 11421 Saudi Arabia
| | - Mohammad Asif Alam
- Center of Excellence for Research in Engineering Materials (CEREM), King Saud University P.O. Box 800 Riyadh 11421 Saudi Arabia
| | - Imtiaz Mulla
- Former Emeritus Scientist (CSIR), NCL Pune 411008 India
| | - Mohaseen S Tamboli
- Korea Institute of Energy Technology (KENTECH) 21 KENTECH-gil Naju Jeollanam-do 58330 Republic of Korea
| | - J S Park
- Department of Materials Science and Engineering, Hanbat National University Daejeon 34158 South Korea
| | - Sharad Suryavanshi
- School of Physical Sciences, Punyashlok Ahilyadevi Holkar Solapur University Solapur 413255 India
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Zhang C, Zheng Z, Liu K, Debliquy M, Liu Q. Highly sensitive and selective Sb 2WO 6 microspheres in detecting VOC biomarkers in cooked rice: Experimental and density functional theory study. Food Chem 2023; 424:136323. [PMID: 37210843 DOI: 10.1016/j.foodchem.2023.136323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 05/23/2023]
Abstract
The palatability of cooked rice is susceptible to the flavor and effective detection of volatile organic compounds (VOCs) can avoid deterioration and improve the taste quality. Herein, hierarchical antimony tungstate (Sb2WO6) microspheres are synthesized through a solvothermal process and the effect of solvothermal temperature on the room temperature gas-sensing properties of gas sensors is investigated. Outstanding sensitivity towards VOC biomarkers (nonanal, 1-octanol, geranyl acetone and 2-pentylfuran) in cooked rice is achieved and the sensors exhibit remarkable stability and reproducibility, which are contributed to the formation of the hierarchical microsphere structure, larger specific surface area, narrower band gap and increased oxygen vacancy content. The kinetic parameters combined with principal component analysis (PCA) effectively distinguish the four VOCs while the enhanced sensing mechanism was substantiated through density functional theory (DFT) calculation. This work provides a strategy for fabricating high performance Sb2WO6 gas sensors which can be practically applied to food industry.
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Affiliation(s)
- Chao Zhang
- College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, PR China.
| | - Zichen Zheng
- College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, PR China
| | - Kewei Liu
- College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, PR China
| | - Marc Debliquy
- Service de Science des Matériaux, Faculté Polytechnique, Université de Mons, Mons 7000, Belgium
| | - Qiaoquan Liu
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu, Yangzhou University, Yangzhou 225009, Jiangsu Province, PR China
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Guo J, Gan J, Ruan H, Yuan X, Kong C, Liu Y, Su M, Liu Y, Liu W, Zhang B, Zhang Y, Cheng G, Du Z. Active-ion-gated room temperature acetone gas sensing of ZnO nanowires array. EXPLORATION (BEIJING, CHINA) 2022; 2:20220065. [PMID: 37324798 PMCID: PMC10191029 DOI: 10.1002/exp.20220065] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 08/23/2022] [Indexed: 06/17/2023]
Abstract
Reducing the high operation temperature of gas sensor to room temperature (RT) have attracted intense interests for its distinct preponderances, including energy-saving and super stability, which presents great prospects in commercial application. The exciting strategies for RT gas sensing, such as unique materials with activated surface or light activation, do not directly modulate the active ions for gas sensing, limiting the RT gas sensing performances. Here, an active-ion-gated strategy has been proposed for RT gas sensing with high performance and low power consumption, in which gas ions in triboelectric plasma are introduced into metal oxide semiconductor (MOS) film to act as both floating gate and active sensing ions. The active-ion-gated ZnO nanowires (NWs) array shows a sensitivity of 38.3% to 10 ppm acetone gas at RT, and the maximum power consumption is only 4.5 mW. At the same time, the gas sensor exhibits excellent selectivity to acetone. More importantly, the response (recovery) time of this sensor is as low as 11 s (25 s). It is found that OH-(H2O)4 ions in plasma are the key for realizing RT gas sensing ability, and an accompanied resistive switch is also observed. It is considered that the electron transfer between OH-(H2O)4 and ZnO NWs will forms a hydroxyl-like intermediate state (OH*) on the top of Zn2+, leading to the band bending of ZnO and activating the reactive O2 - ions on the oxygen vacancies. The active-ion-gated strategy proposed here present a novel exploration to achieving RT gas sensing performance of MOS by activating sensing properties at the scale of ions or atoms.
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Affiliation(s)
- Junmeng Guo
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Jiahui Gan
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Haoran Ruan
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Xiaobo Yuan
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Chuiyun Kong
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Yang Liu
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Meiying Su
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Yabing Liu
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Wei Liu
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Bao Zhang
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Yongle Zhang
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Gang Cheng
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
| | - Zuliang Du
- Key Lab for Special Functional MaterialsMinistry of EducationNational & Local Joint Engineering Research Center for High‐Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengChina
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Lee DH, Yoo H. Recent Advances in Photo-Activated Chemical Sensors. SENSORS (BASEL, SWITZERLAND) 2022; 22:9228. [PMID: 36501929 PMCID: PMC9738123 DOI: 10.3390/s22239228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 05/27/2023]
Abstract
Gas detectors have attracted considerable attention for monitoring harmful gases and air pollution because of industry development and the ongoing interest in human health. On the other hand, conventional high-temperature gas detectors are unsuitable for safely detecting harmful gases at high activation temperatures. Photo-activated gas detectors improve gas sensing performance at room temperature and enable low-power operation. This review presents a timely overview of photo-activated gas detectors that use illuminated light instead of thermal energy. Illuminated light assists in gas detection and is classified as visible or ultraviolet light. The research on photo-activated gas detectors is organized according to the type of gas that can be intensively detected. In addition, a development strategy for advancing photo-activated gas detectors is discussed.
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Affiliation(s)
| | - Hocheon Yoo
- Department of Electronic Engineering, Gachon University, 1342 Seongnam−daero, Seongnam 13120, Republic of Korea
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Chen X, Wreyford R, Nasiri N. Recent Advances in Ethylene Gas Detection. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15175813. [PMID: 36079195 PMCID: PMC9457196 DOI: 10.3390/ma15175813] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/13/2022] [Accepted: 08/18/2022] [Indexed: 05/24/2023]
Abstract
The real-time detecting and monitoring of ethylene gas molecules could benefit the agricultural, horticultural and healthcare industries. In this regard, we comprehensively review the current state-of-the-art ethylene gas sensors and detecting technologies, covering from preconcentrator-equipped gas chromatographic systems, Fourier transform infrared technology, photonic crystal fiber-enhanced Raman spectroscopy, surface acoustic wave and photoacoustic sensors, printable optically colorimetric sensor arrays to a wide range of nanostructured chemiresistive gas sensors (including the potentiometric and amperometric-type FET-, CNT- and metal oxide-based sensors). The nanofabrication approaches, working conditions and sensing performance of these sensors/technologies are carefully discussed, and a possible roadmap for the development of ethylene detection in the near future is proposed.
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Mokoloko LL, Matsoso JB, Antonatos N, Mazánek V, Moreno BD, Forbes RP, Barrett DH, Sofer Z, Coville NJ. From 0D to 2D: N-doped carbon nanosheets for detection of alcohol-based chemical vapours. RSC Adv 2022; 12:21440-21451. [PMID: 35975088 PMCID: PMC9346501 DOI: 10.1039/d2ra03931a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 07/12/2022] [Indexed: 12/03/2022] Open
Abstract
The application of N-doped carbon nanosheets, with and without embedded carbon dots, as active materials for the room temperature chemoresistive detection of methanol and/or ethanol is presented. The new carbons were made by converting 0D N-doped carbon dots (NCDs) to 2D nitrogen-doped carbon nanosheets by heat treatment (200–700 °C). The nanosheets exhibited a lateral size of ∼3 μm and a thickness of ∼12 nm at the highest annealing temperature. Both Raman and TEM analyses showed morphological transitions of the dots to the sheets, whilst XPS analysis revealed transformation of the N-bonding states with increasing temperature. PDF analysis confirmed the presence of defective carbon sheets. Room temperature screening of the chemical vapours of two alcohols (methanol and ethanol), revealed that the structure and the type of N-configuration influenced the detection of the chemical vapours. For instance, the lateral size of the nanosheets and the high charge density N-configurations promoted detection of both methanol and ethanol vapours at good sensitivity (−16.8 × 10−5 ppm−1EtOH and 1.2 × 10−5 ppm−1MeOH) and low LoD (∼44 ppmEtOH and ∼30.3 ppmMeOH) values. The study showed that the composite nature as well as the large basal area of the carbon nanosheets enabled generation of adequate defective sites that facilitated easy adsorption of the VOC analyte molecules, thereby eliminating the need to use conducting polymers or the formation of porous molecular frameworks for the alcohol detection. 2D layered carbon nanostructures made by annealing 0D carbon dots, have been used as ethanol/methanol sensors.![]()
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Affiliation(s)
- Lerato L Mokoloko
- The Molecular Sciences Institute, School of Chemistry. University of the Witwatersrand Johannesburg 2050 South Africa .,DSI-NRF Centre of Excellence in Catalysis (cchange), University of the Witwatersrand Johannesburg 2050 South Africa
| | - Joyce B Matsoso
- Department of Inorganic Chemistry, University of Chemistry and Technology - Prague Technická 5, Dejvice 166 28 Praha 6 Czech Republic
| | - Nikolas Antonatos
- Department of Inorganic Chemistry, University of Chemistry and Technology - Prague Technická 5, Dejvice 166 28 Praha 6 Czech Republic
| | - Vlastimil Mazánek
- Department of Inorganic Chemistry, University of Chemistry and Technology - Prague Technická 5, Dejvice 166 28 Praha 6 Czech Republic
| | - Beatriz D Moreno
- Canadian Light Source Inc. 44 Innovation Boulevard Saskatoon SK S7N 2V3 Canada
| | - Roy P Forbes
- The Molecular Sciences Institute, School of Chemistry. University of the Witwatersrand Johannesburg 2050 South Africa .,DSI-NRF Centre of Excellence in Catalysis (cchange), University of the Witwatersrand Johannesburg 2050 South Africa
| | - Dean H Barrett
- The Molecular Sciences Institute, School of Chemistry. University of the Witwatersrand Johannesburg 2050 South Africa
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology - Prague Technická 5, Dejvice 166 28 Praha 6 Czech Republic
| | - Neil J Coville
- The Molecular Sciences Institute, School of Chemistry. University of the Witwatersrand Johannesburg 2050 South Africa .,DSI-NRF Centre of Excellence in Catalysis (cchange), University of the Witwatersrand Johannesburg 2050 South Africa
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11
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Li Z, Jia L, Chen J, Cui X, Zhou Q. Adsorption and Sensing Performances of Pristine and Au-Decorated Gallium Nitride Monolayer to Noxious Gas Molecules: A DFT Investigation. Front Chem 2022; 10:898154. [PMID: 35646827 PMCID: PMC9133956 DOI: 10.3389/fchem.2022.898154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 04/12/2022] [Indexed: 12/14/2022] Open
Abstract
In this study, the adsorption of noxious gas molecules (NO, Cl2, and O3) on GaN and Au-decorated GaN was systematically scrutinized, and the adsorption energy, bond length, charge, density of state (DOS), partial density of state (PDOS), electron deformation density (EDD), and orbitals were analyzed by the density functional theory (DFT) method. It is found that the interaction between NO and pristine GaN is physical adsorption, while GaN chemically reacts with Cl2 and O3. These observations suggest that pristine GaN may be a candidate for the detection of Cl2 and O3. The highly activated Au-decorated GaN can enhance the adsorption performance toward NO and convert the physical adsorption for NO into chemical adsorption, explaining the fact that precious metal doping is essential for regulating the electronic properties of the substrate material. This further confirms the well-established role of Au-decorated GaN in NO gas-sensing applications. In addition, the adsorption performance of Au-decorated GaN for Cl2 and O3 molecules is highly improved, which provides guidance to scavenge toxic gases such as Cl2 and O3 by the Au-decorated GaN material.
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12
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Analysis of MEMS cantilever sensor for sensing volatile organic compounds. MICRO AND NANO ENGINEERING 2022. [DOI: 10.1016/j.mne.2022.100143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Cova CM, Rincón E, Espinosa E, Serrano L, Zuliani A. Paving the Way for a Green Transition in the Design of Sensors and Biosensors for the Detection of Volatile Organic Compounds (VOCs). BIOSENSORS 2022; 12:51. [PMID: 35200311 PMCID: PMC8869180 DOI: 10.3390/bios12020051] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/13/2022] [Accepted: 01/18/2022] [Indexed: 05/06/2023]
Abstract
The efficient and selective detection of volatile organic compounds (VOCs) provides key information for various purposes ranging from the toxicological analysis of indoor/outdoor environments to the diagnosis of diseases or to the investigation of biological processes. In the last decade, different sensors and biosensors providing reliable, rapid, and economic responses in the detection of VOCs have been successfully conceived and applied in numerous practical cases; however, the global necessity of a sustainable development, has driven the design of devices for the detection of VOCs to greener methods. In this review, the most recent and innovative VOC sensors and biosensors with sustainable features are presented. The sensors are grouped into three of the main industrial sectors of daily life, including environmental analysis, highly important for toxicity issues, food packaging tools, especially aimed at avoiding the spoilage of meat and fish, and the diagnosis of diseases, crucial for the early detection of relevant pathological conditions such as cancer and diabetes. The research outcomes presented in the review underly the necessity of preparing sensors with higher efficiency, lower detection limits, improved selectivity, and enhanced sustainable characteristics to fully address the sustainable manufacturing of VOC sensors and biosensors.
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Affiliation(s)
- Camilla Maria Cova
- Department of Chemistry, University of Florence and CSGI, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy;
| | - Esther Rincón
- BioPren Group, Inorganic Chemistry and Chemical Engineering Department, Faculty of Sciences, University of Cordoba, 14014 Cordoba, Spain; (E.R.); (E.E.); (L.S.)
| | - Eduardo Espinosa
- BioPren Group, Inorganic Chemistry and Chemical Engineering Department, Faculty of Sciences, University of Cordoba, 14014 Cordoba, Spain; (E.R.); (E.E.); (L.S.)
| | - Luis Serrano
- BioPren Group, Inorganic Chemistry and Chemical Engineering Department, Faculty of Sciences, University of Cordoba, 14014 Cordoba, Spain; (E.R.); (E.E.); (L.S.)
| | - Alessio Zuliani
- Department of Chemistry, University of Florence and CSGI, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy;
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Hydrothermal Synthesis of Hierarchical SnO 2 Nanostructures for Improved Formaldehyde Gas Sensing. NANOMATERIALS 2022; 12:nano12020228. [PMID: 35055246 PMCID: PMC8781589 DOI: 10.3390/nano12020228] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/30/2021] [Accepted: 01/04/2022] [Indexed: 11/16/2022]
Abstract
The indoor environment of buildings affects people’s daily life. Indoor harmful gases include volatile organic gas and greenhouse gas. Therefore, the detection of harmful gas by gas sensors is a key method for developing green buildings. The reasonable design of SnO2-sensing materials with excellent structures is an ideal choice for gas sensors. In this study, three types of hierarchical SnO2 microspheres assembled with one-dimensional nanorods, including urchin-like microspheres (SN-1), flower-like microspheres (SN-2), and hydrangea-like microspheres (SN-3), are prepared by a simple hydrothermal method and further applied as gas-sensing materials for an indoor formaldehyde (HCHO) gas-sensing test. The SN-1 sample-based gas sensor demonstrates improved HCHO gas-sensing performance, especially demonstrating greater sensor responses and faster response/recovery speeds than SN-2- and SN-3-based gas sensors. The improved HCHO gas-sensing properties could be mainly attributed to the structural difference of smaller nanorods. These results further indicate the uniqueness of the structure of the SN-1 sample and its suitability as HCHO- sensing material.
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Bhati VS, Takhar V, Raliya R, Kumar M, Banerjee R. Recent advances in g-C3N4 based gas sensors for the detection of toxic and flammable gases: a review. NANO EXPRESS 2021. [DOI: 10.1088/2632-959x/ac477b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
In recent years, many 2D nanomaterials like graphene, MoS2, phosphorene, and metal oxide nanosheets have been investigated for gas sensing applications due to their excellent properties. Amongst other 2D nanomaterials, graphitic carbon nitride (g-C3N4) has attracted significant attention owing to its simple synthesis process, tunable electronic properties, and exceptional physicochemical properties. Such remarkable properties assert g-C3N4 as a potential candidate for the next-generation high-performance gas sensors employed in the detection of toxic and flammable gases. Although several articles and reviews are available on g-C3N4 for their synthesis, functionalities, and applications for the detection of humidity. Few of them has focused their attention on gas sensing using g-C3N4. Thus, in this review, we have methodically summed up the recent advances in g-C3N4 and its composites-based gas sensor for the detection of toxic and flammable gases. Moreover, we have also incorporated the synthesis strategies and the comprehensive physics of g-C3N4 based gas sensors. Additionally, different approaches are presented for the enhancement of gas sensing/detecting properties of g-C3N4 based gas sensors. Finally, the challenges and future scope of g-C3N4 based gas sensors for real-time monitoring of gases have been discussed.
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Shellaiah M, Sun KW. Inorganic-Diverse Nanostructured Materials for Volatile Organic Compound Sensing. SENSORS (BASEL, SWITZERLAND) 2021; 21:633. [PMID: 33477501 PMCID: PMC7831086 DOI: 10.3390/s21020633] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/05/2021] [Accepted: 01/14/2021] [Indexed: 11/17/2022]
Abstract
Environmental pollution related to volatile organic compounds (VOCs) has become a global issue which attracts intensive work towards their controlling and monitoring. To this direction various regulations and research towards VOCs detection have been laid down and conducted by many countries. Distinct devices are proposed to monitor the VOCs pollution. Among them, chemiresistor devices comprised of inorganic-semiconducting materials with diverse nanostructures are most attractive because they are cost-effective and eco-friendly. These diverse nanostructured materials-based devices are usually made up of nanoparticles, nanowires/rods, nanocrystals, nanotubes, nanocages, nanocubes, nanocomposites, etc. They can be employed in monitoring the VOCs present in the reliable sources. This review outlines the device-based VOC detection using diverse semiconducting-nanostructured materials and covers more than 340 references that have been published since 2016.
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Affiliation(s)
| | - Kien Wen Sun
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan;
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