1
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Ahmed J, Faisal M, Algethami JS, Alsaiari M, Jalalah M, Harraz FA. CeO 2·ZnO@biomass-derived carbon nanocomposite-based electrochemical sensor for efficient detection of ascorbic acid. Anal Biochem 2024; 692:115574. [PMID: 38782251 DOI: 10.1016/j.ab.2024.115574] [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] [Received: 01/23/2024] [Revised: 03/26/2024] [Accepted: 05/21/2024] [Indexed: 05/25/2024]
Abstract
Ascorbic acid (AA), a prominent antioxidant commonly found in human blood serum, serves as a biomarker for assessing oxidative stress levels. Therefore, precise detection of AA is crucial for swiftly diagnosing conditions arising from abnormal AA levels. Consequently, the primary aim of this research is to develop a sensitive and selective electrochemical sensor for accurate AA determination. To accomplish this aim, we used a novel nanocomposite comprised of CeO2-doped ZnO adorned on biomass-derived carbon (CeO2·ZnO@BC) as the active nanomaterial, effectively fabricating a glassy carbon electrode (GCE). Various analytical techniques were employed to scrutinize the structure and morphology features of the CeO2·ZnO@BC nanocomposite, ensuring its suitability as the sensing nanomaterial. This innovative sensor is capable of quantifying a wide range of AA concentrations, spanning from 0.5 to 1925 μM in a neutral phosphate buffer solution. It exhibits a remarkable sensitivity of 0.2267 μA μM-1cm-2 and a practical detection limit of 0.022 μM. Thanks to its exceptional sensitivity and selectivity, this sensor enables highly accurate determination of AA concentrations in real samples. Moreover, its superior reproducibility, repeatability, and stability underscore its reliability and robustness for AA quantification.
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Affiliation(s)
- Jahir Ahmed
- Advanced Materials and Nano-Research Centre (AMNRC), Najran University, Najran, 11001, Saudi Arabia; Department of Chemistry, Faculty of Science and Arts, Najran University, Najran, 11001, Saudi Arabia
| | - M Faisal
- Advanced Materials and Nano-Research Centre (AMNRC), Najran University, Najran, 11001, Saudi Arabia; Department of Chemistry, Faculty of Science and Arts, Najran University, Najran, 11001, Saudi Arabia
| | - Jari S Algethami
- Advanced Materials and Nano-Research Centre (AMNRC), Najran University, Najran, 11001, Saudi Arabia; Department of Chemistry, Faculty of Science and Arts, Najran University, Najran, 11001, Saudi Arabia
| | - Mabkhoot Alsaiari
- Advanced Materials and Nano-Research Centre (AMNRC), Najran University, Najran, 11001, Saudi Arabia; Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Sharurah, 68342, Saudi Arabia
| | - Mohammed Jalalah
- Advanced Materials and Nano-Research Centre (AMNRC), Najran University, Najran, 11001, Saudi Arabia; Department of Electrical Engineering, College of Engineering, Najran University, Najran, 11001, Saudi Arabia
| | - Farid A Harraz
- Advanced Materials and Nano-Research Centre (AMNRC), Najran University, Najran, 11001, Saudi Arabia; Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Sharurah, 68342, Saudi Arabia.
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2
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Gao Y, Zhou W, Wang Y, Gao Y, Han J, Kong D, Lu G. Ag 2S-Decorated One-Dimensional CdS Nanorods for Rapid Detection and Effective Discrimination of n-Butanol. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:394. [PMID: 38470725 PMCID: PMC10934644 DOI: 10.3390/nano14050394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/11/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024]
Abstract
N-butanol (C4H9OH) is a volatile organic compound (VOC) that is susceptible to industrial explosions. It has become imperative to develop n-butanol sensors with high selectivity and fast response and recovery kinetics. CdS/Ag2S composite nanomaterials were designed and prepared by the solvothermal method. The incorporation of Ag2S engendered a notable augmentation in specific surface area and a consequential narrow band gap. The CdS/Ag2S-based sensor with 3% molar ratio of Ag2S, operating at 200 °C, demonstrated a remarkably elevated response (S = Ra/Rg = 24.5) when exposed to 100 ppm n-butanol, surpassing the pristine CdS by a factor of approximately four. Furthermore, this sensor exhibited notably shortened response and recovery times, at a mere 4 s and 1 s, respectively. These improvements were ascribed to the one-dimensional single-crystal nanorod structure of CdS, which provided an effective path for expedited electron transport along its axial dimension. Additionally, the electron and chemical sensitization effects resulting from the modification with precious metal sulfides Ag2S were the primary reasons for enhancing the sensor response. This work can contribute to mitigating the safety risks associated with the use of n-butanol in industrial processes.
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Affiliation(s)
| | | | | | - Yuan Gao
- State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China; (Y.G.); (W.Z.); (Y.W.); (J.H.); (D.K.); (G.L.)
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3
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Jung MH, Kwak M, Ahn J, Song JY, Kang H, Jung HT. Highly Sensitive and Selective Acetylene CuO/ZnO Heterostructure Sensors through Electrospinning at Lean O 2 Concentration for Transformer Diagnosis. ACS Sens 2024; 9:217-227. [PMID: 38165082 DOI: 10.1021/acssensors.3c01844] [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: 01/03/2024]
Abstract
Acetylene (C2H2) is a gas that can cause explosions in transformers even at low concentrations. Gas chromatography (GC) or photoacoustic spectroscopy (PAS) have been used to detect C2H2 during dissolved gas analysis (DGA), but they are not suitable for monitoring numerous transformers at substations. Even though metal oxide semiconductor (MOS) based C2H2 sensors have drawn much attention as a potential solution, existing MOS-based C2H2 sensors have low sensitivity toward C2H2 in the transformer environment (<2% O2 concentrations). This study develops high-performance C2H2 gas sensors for DGA using a heterostructure of CuO/ZnO (CZ) via the electrospinning process. Performance of various ratios of CZ composite nanofibers are compared in a transformer-like environment, and the optimal composition of CZ nanofibers for detection of C2H2 at 2% O2 concentration is proposed. The CuO:ZnO = 8:2 (CZ2) sensor achieves the highest response (Rg/Ra = 7.6 against 10 ppm of C2H2) toward low concentration of C2H2 at 200 °C with good stability (>10 h). In addition, the CZ2 sensor also shows a high selectivity (>5 times) to coexisting transformer oil gases which are H2, CH4, C2H4, C2H6, CO, and CO2. Overall, this study is the first to demonstrate a high performing DGA sensor under 2% O2 concentration that can provide a practical solution to monitoring the low concentration of C2H2 in transformers effectively.
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Affiliation(s)
- Mi-Hee Jung
- Energy and Environmental Laboratory, Korea Electric Power Research Institute (KEPRI), 105 Munji-Ro, Yuseong-Gu, Daejeon 34056, Korea
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), Yuseong-Gu, Daejeon 34141, Korea
| | - Minjun Kwak
- Energy and Environmental Laboratory, Korea Electric Power Research Institute (KEPRI), 105 Munji-Ro, Yuseong-Gu, Daejeon 34056, Korea
| | - Junghwan Ahn
- Energy and Environmental Laboratory, Korea Electric Power Research Institute (KEPRI), 105 Munji-Ro, Yuseong-Gu, Daejeon 34056, Korea
| | - Ji-Yoon Song
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), Yuseong-Gu, Daejeon 34141, Korea
| | - Hohyung Kang
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), Yuseong-Gu, Daejeon 34141, Korea
| | - Hee-Tae Jung
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), Yuseong-Gu, Daejeon 34141, Korea
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4
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Ahmed J, Faisal M, Algethami JS, Alsaiari MA, Alsareii SA, Harraz FA. Low Overpotential Amperometric Sensor Using Yb 2O 3.CuO@rGO Nanocomposite for Sensitive Detection of Ascorbic Acid in Real Samples. BIOSENSORS 2023; 13:588. [PMID: 37366953 DOI: 10.3390/bios13060588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/20/2023] [Accepted: 05/24/2023] [Indexed: 06/28/2023]
Abstract
The ultimate objective of this research work is to design a sensitive and selective electrochemical sensor for the efficient detection of ascorbic acid (AA), a vital antioxidant found in blood serum that may serve as a biomarker for oxidative stress. To achieve this, we utilized a novel Yb2O3.CuO@rGO nanocomposite (NC) as the active material to modify the glassy carbon working electrode (GCE). The structural properties and morphological characteristics of the Yb2O3.CuO@rGO NC were investigated using various techniques to ensure their suitability for the sensor. The resulting sensor electrode was able to detect a broad range of AA concentrations (0.5-1571 µM) in neutral phosphate buffer solution, with a high sensitivity of 0.4341 µAµM-1cm-2 and a reasonable detection limit of 0.062 µM. The sensor's great sensitivity and selectivity allowed it to accurately determine the levels of AA in human blood serum and commercial vitamin C tablets. It demonstrated high levels of reproducibility, repeatability, and stability, making it a reliable and robust sensor for the measurement of AA at low overpotential. Overall, the Yb2O3.CuO@rGO/GCE sensor showed great potential in detecting AA from real samples.
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Affiliation(s)
- Jahir Ahmed
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia
- Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 11001, Saudi Arabia
| | - Mohd Faisal
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia
- Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 11001, Saudi Arabia
| | - Jari S Algethami
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia
- Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 11001, Saudi Arabia
| | - Mabkhoot A Alsaiari
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia
- Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Sharurah 68342, Saudi Arabia
| | - Saeed A Alsareii
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia
- Department of Surgery, College of Medicine, Najran University, Najran 11001, Saudi Arabia
| | - Farid A Harraz
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia
- Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Sharurah 68342, Saudi Arabia
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5
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High-Performance Room-Temperature Conductometric Gas Sensors: Materials and Strategies. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10060227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chemiresistive sensors have gained increasing interest in recent years due to the necessity of low-cost, effective, high-performance gas sensors to detect volatile organic compounds (VOC) and other harmful pollutants. While most of the gas sensing technologies rely on the use of high operation temperatures, which increase usage cost and decrease efficiency due to high power consumption, a particular subset of gas sensors can operate at room temperature (RT). Current approaches are aimed at the development of high-sensitivity and multiple-selectivity room-temperature sensors, where substantial research efforts have been conducted. However, fewer studies presents the specific mechanism of action on why those particular materials can work at room temperature and how to both enhance and optimize their RT performance. Herein, we present strategies to achieve RT gas sensing for various materials, such as metals and metal oxides (MOs), as well as some of the most promising candidates, such as polymers and hybrid composites. Finally, the future promising outlook on this technology is discussed.
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6
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He Y, Wang Z, Wang H, Wang Z, Zeng G, Xu P, Huang D, Chen M, Song B, Qin H, Zhao Y. Metal-organic framework-derived nanomaterials in environment related fields: Fundamentals, properties and applications. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213618] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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7
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Liang YC, Chang YC, Zhao WC. Design and Synthesis of Novel 2D Porous Zinc Oxide-Nickel Oxide Composite Nanosheets for Detecting Ethanol Vapor. NANOMATERIALS 2020; 10:nano10101989. [PMID: 33050317 PMCID: PMC7599868 DOI: 10.3390/nano10101989] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/01/2020] [Accepted: 10/06/2020] [Indexed: 12/17/2022]
Abstract
The porous zinc oxide-nickel oxide (ZnO-NiO) composite nanosheets were synthesized via sputtering deposition of NiO thin film on the porous ZnO nanosheet templates. Various NiO film coverage sizes on porous ZnO nanosheet templates were achieved by changing NiO sputtering duration in this study. The microstructures of the porous ZnO-NiO composite nanosheets were investigated herein. The rugged surface feature of the porous ZnO-NiO composite nanosheets were formed and thicker NiO coverage layer narrowed the pore size on the ZnO nanosheet template. The gas sensors based on the porous ZnO-NiO composite nanosheets displayed higher sensing responses to ethanol vapor in comparison with the pristine ZnO template at the given target gas concentrations. Furthermore, the porous ZnO-NiO composite nanosheets with the suitable NiO coverage content demonstrated superior gas-sensing performance towards 50-750 ppm ethanol vapor. The observed ethanol vapor-sensing performance might be attributed to suitable ZnO/NiO heterojunction numbers and unique porous nanosheet structure with a high specific surface area, providing abundant active sites on the surface and numerous gas diffusion channels for the ethanol vapor molecules. This study demonstrated that coating of NiO on the porous ZnO nanosheet template with a suitable coverage size via sputtering deposition is a promising route to fabricate porous ZnO-NiO composite nanosheets with a high ethanol vapor sensing ability.
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8
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Synthesis, characterization, and NH3 gas sensing application of Zn doped cobalt oxide nanoparticles. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108145] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Deng L, Bao L, Xu J, Wang D, Wang X. Highly sensitive acetone gas sensor based on ultra-low content bimetallic PtCu modified WO3·H2O hollow sphere. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2020.04.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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10
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Duanmu F, Shen Z, Liu Q, Zhong S, Ji H. A WO3-CuWO4 nanostructured heterojunction for enhanced n-butanol sensing performance. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.07.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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11
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Nadargi D, Tamboli MS, Patil SS, Dateer RB, Mulla IS, Choi H, Suryavanshi SS. Microwave-Epoxide-Assisted Hydrothermal Synthesis of the CuO/ZnO Heterojunction: a Highly Versatile Route to Develop H 2S Gas Sensors. ACS OMEGA 2020; 5:8587-8595. [PMID: 32337421 PMCID: PMC7178332 DOI: 10.1021/acsomega.9b04475] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Accepted: 02/27/2020] [Indexed: 06/11/2023]
Abstract
A robust synthesis approach to develop CuO/ZnO nanocomposites using microwave-epoxide-assisted hydrothermal synthesis and their proficiency toward H2S gas-sensing application are reported. The low-cost metal salts (Cu and Zn) as precursors in aqueous media and epoxide (propylene oxide) as a proton scavenger/gelation agent are used for the formation of mixed metal hydroxides. The obtained sol was treated using the microwave hydrothermal process to yield the high-surface area (34.71 m2/g) CuO/ZnO nanocomposite. The developed nanocomposites (1.25-10 mol % Cu doping) showcase hexagonal ZnO and monoclinic CuO structures, with an average crystallite size in the range of 18-29 nm wrt Cu doping in the ZnO matrix. The optimized nanocomposite (2.5 mol % Cu doping) showed a lowest crystallite size of 21.64 nm, which reduced further to 18.06 nm upon graphene oxide addition. Morphological analyses (scanning electron microscopy and transmission electron microscopy) exhibited rounded grains along with copious channels typical for sol-gel-based materials . Elemental mapping displayed the good dispersion of Cu in the ZnO matrix. When these materials are employed as a gas sensor, they demonstrated high sensitivity and selectivity toward H2S gas in comparison with the reducing gases and volatile organic compounds under investigation. The systematic doping of Cu in the ZnO matrix exhibited an improved response from 76.66 to 94.28%, with reduction in operating temperature from 300 to 250 °C. The 2.5 mol % doped Cu in ZnO was found to impart a response of 23 s for 25 ppm of H2S. Gas-sensing properties are described using an interplay of epoxide-assisted sol-gel chemistry and structural and morphological properties of the developed material.
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Affiliation(s)
- Digambar
Y. Nadargi
- School
of Physical Sciences, PAH Solapur University, Solapur 413255, Maharashtra, India
| | - Mohaseen S. Tamboli
- Department
of Chemistry and Research Institute for Convergence of Basic Sciences, Hanyang University, Seoul 04763, Republic
of Korea
| | - Santosh S. Patil
- Department
of Chemistry, Pohang University of Science
and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Ramesh B. Dateer
- Centre
for Nano and Material Sciences, JAIN (Deemed-to-be-University), Jain Global Campus, Bangalore, Karnataka 562112, India
| | - Imtiaz S. Mulla
- Former
Emeritus Scientist (CSIR), Centre for Materials
for Electronics Technology, Pune 411008, India
| | - Hyosung Choi
- Department
of Chemistry and Research Institute for Convergence of Basic Sciences, Hanyang University, Seoul 04763, Republic
of Korea
| | - Sharad S. Suryavanshi
- School
of Physical Sciences, PAH Solapur University, Solapur 413255, Maharashtra, India
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12
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Liang YC, Chang YC. The effect of Ni content on gas-sensing behaviors of ZnO–NiO p–n composite thin films grown through radio-frequency cosputtering of ceramic ZnO and NiO targets. CrystEngComm 2020. [DOI: 10.1039/d0ce00052c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In this study, dual phase ZnO–NiO p–n composite thin films were grown through radio-frequency cosputtering of ceramic ZnO and NiO targets.
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Affiliation(s)
- Yuan-Chang Liang
- Department of Optoelectronics and Materials Technology
- National Taiwan Ocean University
- Keelung 20224
- Taiwan
| | - Yen-Cheng Chang
- Department of Optoelectronics and Materials Technology
- National Taiwan Ocean University
- Keelung 20224
- Taiwan
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13
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Hwang SH, Kim YK, Hong SH, Lim SK. Cu/CuO@ZnO Hollow Nanofiber Gas Sensor: Effect of Hollow Nanofiber Structure and P-N Junction on Operating Temperature and Sensitivity. SENSORS 2019; 19:s19143151. [PMID: 31319601 PMCID: PMC6679310 DOI: 10.3390/s19143151] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/05/2019] [Accepted: 07/15/2019] [Indexed: 12/02/2022]
Abstract
For the fast and easy detection of carbon monoxide (CO) gas, it was necessary to develop a CO gas sensor to operate in low temperatures. Herein, a novel Cu/CuO-decorated ZnO hollow nanofiber was prepared with the electrospinning, calcination, and photodeposition methods. In the presence of 100 ppm CO gas, the Cu/CuO-photodeposited ZnO hollow nanofiber (Cu/CuO@ZnO HNF) showed twice higher sensitivity than that of pure ZnO nanofiber at a relatively low working temperature of 300 °C. The hollow structure and p–n junction between Cu/CuO and ZnO would be considered to contribute to the enhancement of sensitivity to CO gas at 300 °C due to the improved specific surface area and efficient electron transfer.
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Affiliation(s)
- Sung-Ho Hwang
- Smart Textile Convergence Research Group, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu 42988, Korea
| | - Young Kwang Kim
- Smart Textile Convergence Research Group, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu 42988, Korea
| | - Seong Hui Hong
- Smart Textile Convergence Research Group, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu 42988, Korea
| | - Sang Kyoo Lim
- Smart Textile Convergence Research Group, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu 42988, Korea.
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14
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Park S, Byoun Y, Kang H, Song YJ, Choi SW. ZnO Nanocluster-Functionalized Single-Walled Carbon Nanotubes Synthesized by Microwave Irradiation for Highly Sensitive NO 2 Detection at Room Temperature. ACS OMEGA 2019; 4:10677-10686. [PMID: 31460165 PMCID: PMC6648778 DOI: 10.1021/acsomega.9b00773] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 06/10/2019] [Indexed: 06/01/2023]
Abstract
To improve the NO2-sensing performance of single-walled carbon nanotube (SWCNT)-based sensors, zinc oxide (ZnO) nanoclusters (NCs) were functionalized by a microwave (MW)-assisted synthesis technique. Gas sensors based on pristine SWCNTs and ZnO NC-SWCNT composites synthesized using different weight ratios (ZnO/SWCNTs = 0.5:1, 1:1, 2:1, and 3:1) were fabricated, and their ability to sense various gases at room temperature (25 °C) was investigated. The results showed that the sensing performance of the ZnO NC-SWCNT composite synthesized with a weight ratio of 1:1 (denoted as Z-SWCNTs) was significantly enhanced with respect to NO2 response and selectivity. This enhanced sensing performance is thought to be a result of both the modulation of the conduction channel at the ZnO NC-SWCNT heterointerfaces and the generation of defects (or holes) by MW irradiation that act as active sites for the target gases. The results obtained in this work provide not only a facile method of cofunctionalizing oxide NCs and defects but also a new methodology for improving the sensing capabilities of SWCNT-based gas sensors.
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Affiliation(s)
- Suyoung Park
- Department
of Aviation Maintenance Engineering, Far
East University, Eumseong-gun, Chungcheongbuk-do 27601, Republic of Korea
| | - Youngmin Byoun
- Metal
& Machinery Team, Korea Conformity Laboratories
(KCL), Seoul 08503, Republic of Korea
| | - Hyoungku Kang
- Department
of Electrical Engineering, Korea National
University of Transportation, Chungju-si, Chungcheongbuk-do 27469, Republic of Korea
| | - Young-Jun Song
- Department
of Materials Science and Engineering, Kangwon
National University, Samcheok-si, Gangwon-do 25912, Republic of Korea
| | - Sun-Woo Choi
- Department
of Materials Science and Engineering, Kangwon
National University, Samcheok-si, Gangwon-do 25912, Republic of Korea
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15
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Wang M, Shen Z, Zhao X, Duanmu F, Yu H, Ji H. Rational shape control of porous Co 3O 4 assemblies derived from MOF and their structural effects on n-butanol sensing. JOURNAL OF HAZARDOUS MATERIALS 2019; 371:352-361. [PMID: 30856446 DOI: 10.1016/j.jhazmat.2019.02.098] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 02/08/2019] [Accepted: 02/26/2019] [Indexed: 06/09/2023]
Abstract
Porous metal oxides are promising materials for VOCs (volatile organic compounds) chemical sensors, because they have large specific surface areas and enough internal space for the fast gas diffusion. Recently, metal-organic framework (MOF) materials with varied shapes and sizes have been regarded as good templates for preparing porous metal oxides. Herein, four kinds of Co-MOFs were prepared by altering the ratios of Co2+ ions and 2-methylimidazole at room temperature, which exhibited well-controlled shapes. Then, corresponding porous Co3O4 assembled from nanoparticles was acquired by heating Co-MOFs, and showed a good sensing performance for n-butanol, with a response up to 21.0 toward 100 ppm n-butanol. Moreover, it is found that the shape and the size of Co3O4 assemblies can significantly influence their sensing performances. For porous Co3O4 assemblies, when the nanoparticles are small enough (˜10 nm), a porous structure with a larger proportion of the nanoparticles close to its surface tends to show a better gas-sensing performance. The findings can be used in the design of gas-sensing materials in the future.
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Affiliation(s)
- Mingjing Wang
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China
| | - Zhurui Shen
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China.
| | - Xiaodong Zhao
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China
| | - Fanpeng Duanmu
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China
| | - Huijun Yu
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China
| | - Huiming Ji
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China.
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16
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He Y, Zhao M, Yu M, Zhuang Y, Cheng F, Chen S. Interfacial potential barrier driven electrochemical detection of Cr6+. Anal Chim Acta 2018; 1029:8-14. [DOI: 10.1016/j.aca.2018.05.042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 05/11/2018] [Accepted: 05/13/2018] [Indexed: 11/30/2022]
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17
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Liu N, Li T, Yu H, Xia L. Fabrication of a Disordered Mesoporous ZnO Matrix Modified by CuO Film as High‐Performance NO
x
Sensor. ChemistrySelect 2018. [DOI: 10.1002/slct.201800429] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ning Liu
- School of Chemistry & Environmental EngineeringChangchun University of Science and Technology Changchun 130022, P. R. China
| | - Tian‐tian Li
- School of Chemistry & Environmental EngineeringChangchun University of Science and Technology Changchun 130022, P. R. China
| | - Hui Yu
- School of Chemistry & Environmental EngineeringChangchun University of Science and Technology Changchun 130022, P. R. China
| | - Long Xia
- School of Materials Science and EngineeringHarbin Institute of Technology at Weihai Weihai 264209, P. R. China
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Li TT, Bao N, Geng AF, Yu H, Yang Y, Dong XT. Study on room temperature gas-sensing performance of CuO film-decorated ordered porous ZnO composite by In 2O 3 sensitization. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171788. [PMID: 29515887 PMCID: PMC5830776 DOI: 10.1098/rsos.171788] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/08/2018] [Indexed: 05/17/2023]
Abstract
For the first time, ordered mesoporous ZnO nanoparticles have been synthesized by a template method. The electroplating after chemical plating method was creatively used to form copper film on the surface of the prepared ZnO, and then a CuO film-decorated ordered porous ZnO composite (CuO/ZnO) was obtained by a high-temperature oxidation method. In2O3 was loaded into the prepared CuO film-ZnO by an ultrasonic-assisted method to sensitize the room temperature gas-sensing performance of the prepared CuO/ZnO materials. The doped In2O3 could effectively improve the gas-sensing properties of the prepared materials to nitrogen oxides (NO x ) at room temperature. The 1% In2O3 doped CuO/ZnO sample (1 wt% In2O3-CuO/ZnO) showed the best gas-sensing properties whose response to 100 ppm NO x reached 82%, and the detectable minimum concentration reached 1 ppm at room temperature. The prepared materials had a good selectivity, better response, very low detection limit, and high sensitivity to NO x gas at room temperature, which would have a great development space in the gas sensor field and a great research value.
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Affiliation(s)
| | | | - Ai-fang Geng
- Authors for correspondence: Ai-fang Geng e-mail:
| | - Hui Yu
- Authors for correspondence: Hui Yu e-mail:
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