1
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Sun M, Wang M, Ni X, Liu G, Qiao G, Lei S, Wang M, Bai L. ZnO-Au@ZIF-8 core-shell nanorod arrays for ppb-level NO 2 detection. Chem Commun (Camb) 2024; 60:2180-2183. [PMID: 38293906 DOI: 10.1039/d3cc06218j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
ZnO-Au@ZIF-8 core-shell heterostructures were prepared by ZIF-8 encapsulation of sacrificial ZnO-Au nanorods. Because of the catalytic activity of the Au nanoparticles and the sieving effects of the ZIF-8, the ZnO-Au@ZIF-8 heterostructures showed an outstanding response of 1.8 to 5 ppb NO2, and exhibited higher selectivity, stability, anti-humidity and fast response and recovery properties. The combination of the gas-selective catalytic activity of noble metals with the MOF filter used in this work can be easily extended to synthesize other types of MOS@MOF sensors, opening a new avenue for the detection of hazardous gases.
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Affiliation(s)
- Mingqi Sun
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Mingyuan Wang
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, School of Electrical Science and Engineering, Southeast University, Nanjing, Jiangsu Province 210096, China
| | - Xin Ni
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Guiwu Liu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Guanjun Qiao
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Shuangying Lei
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, School of Electrical Science and Engineering, Southeast University, Nanjing, Jiangsu Province 210096, China
| | - Mingsong Wang
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Ling Bai
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
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2
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Saeed M, Marwani HM, Shahzad U, Asiri AM, Rahman MM. Recent Advances, Challenges, and Future Perspectives of ZnO Nanostructure Materials Towards Energy Applications. CHEM REC 2024; 24:e202300106. [PMID: 37249417 DOI: 10.1002/tcr.202300106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 05/17/2023] [Indexed: 05/31/2023]
Abstract
In this approach, zinc oxide (ZnO) is a multipurpose substance with remarkable characteristics such as high sensitivity, a large specific area, non-toxicity, excellent compatibility, and a high isoelectric point, which make it attractive for discussion with some limitations. It is the most favorable possible option for the collection of nanostructures in terms of structure and their characteristics. The development of numerous ZnO nanostructure-based electrochemical sensors and biosensors used in health diagnosis, pharmaceutical evaluation, food hygiene, and contamination of the environment monitoring is described, as well as the production of ZnO nanostructures. Nanostructured ZnO has good chemical and temperature durability as an n-type semiconducting material, making it useful in a wide range of uses, from luminous materials to supercapacitors, batteries, solar cells, photocatalysis, biosensors, medicinal devices, and more. When compared to the bulk materials, the nanosized materials have both a higher rate of disintegration and a higher solubility. Furthermore, ZnO nanoparticles are regarded as top contenders for electrochemical sensors due to their strong electrochemical behaviors and electron transmission characteristics. The impact of many factors, including selectivity, sensitivity, detection limit, strength, and structures, arrangements, and their respective functioning processes, has been investigated. This study concentrated a substantial amount of its attention on the recent advancements that have been made in ZnO-based nanoparticles, composites, and modified materials for use in the application areas of energy storage and conversion devices as well as biological applications. Supercapacitors, Li-ion batteries, dye-sensitized solar cells, photocatalysis, biosensors, medicinal, and biological systems have been studied. ZnO-based materials are constantly analyzed for their advantages in energy and life science applications.
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Affiliation(s)
- Mohsin Saeed
- Chemistry department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Hadi M Marwani
- Chemistry department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Umer Shahzad
- Chemistry department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Abdullah M Asiri
- Chemistry department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Mohammed M Rahman
- Chemistry department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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3
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Bai M, Li C, Zhao X, Wang Q, Pan Q. Controllable Synthesis of Sheet-Flower ZnO for Low Temperature NO 2 Sensor. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1413. [PMID: 37110998 PMCID: PMC10141483 DOI: 10.3390/nano13081413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/13/2023] [Accepted: 04/16/2023] [Indexed: 06/19/2023]
Abstract
ZnO is a wide band gap semiconductor metal oxide that not only has excellent electrical properties but also shows excellent gas-sensitive properties and is a promising material for the development of NO2 sensors. However, the current ZnO-based gas sensors usually operate at high temperatures, which greatly increases the energy consumption of the sensors and is not conducive to practical applications. Therefore, there is a need to improve the gas sensitivity and practicality of ZnO-based gas sensors. In this study, three-dimensional sheet-flower ZnO was successfully synthesized at 60 °C by a simple water bath method and modulated by different malic acid concentrations. The phase formation, surface morphology, and elemental composition of the prepared samples were studied by various characterization techniques. The gas sensor based on sheet-flower ZnO has a high response value to NO2 without any modification. The optimal operating temperature is 125 °C, and the response value to 1 ppm NO2 is 125. At the same time, the sensor also has a lower detection limit (100 ppb), good selectivity, and good stability, showing excellent sensing performance. In the future, water bath-based methods are expected to prepare other metal oxide materials with unique structures.
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Affiliation(s)
- Mingjia Bai
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Information and Communication Engineering, Hainan University, Haikou 570228, China
| | - Chaoyang Li
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Information and Communication Engineering, Hainan University, Haikou 570228, China
| | - Xiaojun Zhao
- School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Qingji Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Information and Communication Engineering, Hainan University, Haikou 570228, China
| | - Qinhe Pan
- School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
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4
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Electrochemical Immunosensor for the Determination of Antibodies against Prostate-Specific Antigen Based on ZnO Nanostructures. Int J Mol Sci 2023; 24:ijms24065803. [PMID: 36982877 PMCID: PMC10052783 DOI: 10.3390/ijms24065803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 03/07/2023] [Accepted: 03/14/2023] [Indexed: 03/22/2023] Open
Abstract
In this study, ZnO nanostructures with different types of morphologies and particle sizes were evaluated and applied for the development of an immunosensor. The first material was composed of spherical, polydisperse nanostructures with a particle size in the range of 10–160 nm. The second was made up of more compact rod-like spherical nanostructures with the diameter of these rods in the range of 50–400 nm, and approximately 98% of the particles were in the range of 20–70 nm. The last sample of ZnO was made up of rod-shaped particles with a diameter of 10–80 nm. These ZnO nanostructures were mixed with Nafion solution and drop-casted onto screen-printed carbon electrodes (SPCE), followed by a further immobilization of the prostate-specific antigen (PSA). The affinity interaction of PSA with monoclonal antibodies against PSA (anti-PSA) was evaluated using the differential pulse voltammetry technique. The limit of detection and limit of quantification of anti-PSA were determined as 1.35 nM and 4.08 nM for compact rod-shaped spherical ZnO nanostructures, and 2.36 nM and 7.15 nM for rod-shaped ZnO nanostructures, respectively.
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Zhang B, Zhang S, Xia Y, Yu P, Xu Y, Dong Y, Wei Q, Wang J. High-Performance Room-Temperature NO 2 Gas Sensor Based on Au-Loaded SnO 2 Nanowires under UV Light Activation. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4062. [PMID: 36432348 PMCID: PMC9698136 DOI: 10.3390/nano12224062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/09/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Optical excitation is widely acknowledged as one of the most effective means of balancing sensor responses and response/recovery properties at room temperature (RT, 25 °C). Moreover, noble metals have been proven to be suitable as photosensitizers for optical excitation. Localized surface plasmon resonance (LSPR) determines the liberalization of quasi-free electrons in noble metals under light irradiation, and numerous injected electrons in semiconductors will greatly promote the generation of chemisorbed oxygen, thus elevating the sensor response. In this study, pure SnO2 and Au/SnO2 nanowires (NWs) were successfully synthesized through the electrospinning method and validated using XRD, EDS, HRTEM, and XPS. Although a Schottky barrier led to a much higher initial resistance of the Au/SnO2 composite compared with pure SnO2 at RT in the dark, the photoinduced resistance of the Au/SnO2 composite became lower than that of pure SnO2 under UV irradiation with the same intensity, which confirmed the effect of LSPR. Furthermore, when used as sensing materials, a detailed comparison between the sensing properties of pure SnO2 and Au/SnO2 composite toward NO2 in the dark and under UV irradiation highlighted the crucial role of the LSPR effects. In particular, the response of Au/SnO2 NWs toward 5 ppm NO2 could reach 65 at RT under UV irradiation, and the response/recovery time was only 82/42 s, which far exceeded those under Au modification-only or optical excitation-only. Finally, the gas-sensing mechanism corresponding to the change in sensor performance in each case was systematically proposed.
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Affiliation(s)
- Bo Zhang
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Institute of Advanced Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Shuai Zhang
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Institute of Advanced Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Yi Xia
- Research Center for Analysis and Measurement, Analytic & Testing Research Center of Yunnan, Kunming University of Science and Technology, Kunming 650093, China
| | - Pingping Yu
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Institute of Advanced Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Yin Xu
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Institute of Advanced Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Yue Dong
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Institute of Advanced Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Qufu Wei
- Key Laboratory of Eco-Textiles (Ministry of Education), Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Jing Wang
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
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6
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Ren X, Xu Z, Zhang Z, Tang Z. Enhanced NO 2 Sensing Performance of ZnO-SnO 2 Heterojunction Derived from Metal-Organic Frameworks. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3726. [PMID: 36364502 PMCID: PMC9658193 DOI: 10.3390/nano12213726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Nitrogen dioxide (NO2) is the major reason for acid rain and respiratory illness in humans. Therefore, rapid, portable, and effective detection of NO2 is essential. Herein, a novel and simple method to construct a ZnO-SnO2 heterojunction is fabricated by pyrolysis of bimetallic metal organic frameworks. The sensitivity of ZnO-SnO2 heterojunction towards 0.2 ppm NO2 under 180 °C is 37, which is 3 times that of pure ZnO and SnO2. The construction of heterojunction speeds up the response-recovery process, and this kind of material exhibits lower detection limit. The construction of heterojunction can significantly improve the NO2 sensitivity. The selectivity, stability, and moisture resistance of ZnO-SnO2 heterojunction are carried out. This could enable the realization of highly selective and sensitive portable detection of NO2.
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7
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Zhang B, Meng L, Li Z. Study of the ordered assembly morphologies of diblock copolymers on the same substrate. RSC Adv 2022; 12:28376-28387. [PMID: 36320541 PMCID: PMC9533419 DOI: 10.1039/d2ra04803e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 09/13/2022] [Indexed: 11/05/2022] Open
Abstract
With the development of frontier technology in emerging semiconductor processes, self-assembling (SA) and directed self-assembly (DSA) of block copolymers (BCPs) have attracted great attention from scientific researchers and become promising candidates for advanced photolithography. Using an optimal coating and baking process, highly ordered assembly morphologies (e.g., cylinder and lamella) of two BCPs in thin films were obtained without an additional topcoat material layer. Moreover, the whole experimental study also provides an optimal process for integrating the two BCPs into the same topographic guiding pattern substrate fabricated by electron beam lithography (EBL) to achieve specific self-assembly. This topographic guiding substrate achieves not only lamellar micro-domains aligned perpendicular to the sidewalls of trench edges but also cylindrical micro-domains (PMMA phase in a PS matrix) aligned parallel to trench edges respectively, which provides insights and valuable information for further applications in lithography and electronic devices.
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Affiliation(s)
- Baolin Zhang
- School of Information Science and Technology, Fudan UniversityShanghai 200433China
| | - Lingkuan Meng
- Beijing Institute of Carbon-based Integrated CircuitYiyuan Cultural and Creative Industry Park, 80 Xingshikou Road, Haidian DistrictBeijing100089China
| | - Zili Li
- School of Information Science and Technology, Fudan UniversityShanghai 200433China
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8
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Malkerova IP, Kayumova DB, Belova EV, Shmelev MA, Sidorov AA, Alikhanyan AS. Zinc Pentafluorobenzoate [Zn2(H2O)(C6F5COO)4(Py)4]: Synthesis, Structure, and Thermodynamic Characteristics. RUSS J COORD CHEM+ 2022. [DOI: 10.1134/s1070328422100037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Huang GQ, Jin YX, Luo SZ, Fu ZH, Wang GE, Xu G. Cascading Photoelectric Detecting and Chemiresistive Gas-Sensing Properties of Pb 5 S 2 I 6 Nanowire Mesh for Multi-Factor Accurate Fire Alarm. SMALL METHODS 2022; 6:e2200470. [PMID: 35732956 DOI: 10.1002/smtd.202200470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/09/2022] [Indexed: 06/15/2023]
Abstract
Accurate fire warning is very important for people's life and property safety. The most commonly used fire alarm is based on the detection of a single factor of gases, smoke particles, or temperature, which easily causes false alarm due to complex environmental conditions. A facile multi-factor route for fabricating an accurate analog fire alarm using a Pb5 S2 I6 nanowire mesh based on its photoelectric and gas-sensing dual function is presented. The Pb5 S2 I6 nanowire mesh presents excellent photoelectric detection capabilities and is sensitive to ppm-level NO2 at room temperature. Under the "two-step verification" circuit of light and gas factors, the bimodal simulation fire alarm based on this Pb5 S2 I6 nanowire mesh can resist the interference of complex environmental factors and effectively reduce the false alarm rate.
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Affiliation(s)
- Gui-Qian Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Ying-Xue Jin
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, China
| | - Shao-Zhen Luo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, Fujian, 350007, China
| | - Zhi-Hua Fu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Guan-E Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
| | - Gang Xu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China
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El Fidha G, Bitri N, Mahjoubi S, Chaabouni F, Llobet E, Casanova-Chafer J. Dysprosium Doped Zinc Oxide for NO 2 Gas Sensing. SENSORS (BASEL, SWITZERLAND) 2022; 22:5173. [PMID: 35890853 PMCID: PMC9317177 DOI: 10.3390/s22145173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
Pure and dysprosium-loaded ZnO films were grown by radio-frequency magnetron sputtering. The films were characterized using a wide variety of morphological, compositional, optical, and electrical techniques. The crystalline structure, surface homogeneity, and bandgap energies were studied in detail for the developed nanocomposites. The properties of pure and dysprosium-doped ZnO thin films were investigated to detect nitrogen dioxide (NO2) at the ppb range. In particular, ZnO sensors doped with rare-earth materials have been demonstrated as a feasible strategy to improve the sensitivity in comparison to their pure ZnO counterparts. In addition, the sensing performance was studied and discussed under dry and humid environments, revealing noteworthy stability and reliability under different experimental conditions. In this perspective, additional gaseous compounds such as ammonia and ethanol were measured, resulting in extremely low sensing responses. Therefore, the gas-sensing mechanisms were discussed in detail to better understand the NO2 selectivity given by the Dy-doped ZnO layer.
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Affiliation(s)
- Ghada El Fidha
- École Nationale Supérieure d’Ingénieurs de Tunis, Université de Tunis, Avenue Taha Hussein Montfleury, Tunis 1008, Tunisia;
- Laboratoire de Photovoltaïque et Matériaux Semi-Conducteurs, École Nationale d’Ingénieurs de Tunis, Université de Tunis, Tunis 1002, Tunisia; (N.B.); (S.M.); (F.C.)
| | - Nabila Bitri
- Laboratoire de Photovoltaïque et Matériaux Semi-Conducteurs, École Nationale d’Ingénieurs de Tunis, Université de Tunis, Tunis 1002, Tunisia; (N.B.); (S.M.); (F.C.)
| | - Sarra Mahjoubi
- Laboratoire de Photovoltaïque et Matériaux Semi-Conducteurs, École Nationale d’Ingénieurs de Tunis, Université de Tunis, Tunis 1002, Tunisia; (N.B.); (S.M.); (F.C.)
| | - Fatma Chaabouni
- Laboratoire de Photovoltaïque et Matériaux Semi-Conducteurs, École Nationale d’Ingénieurs de Tunis, Université de Tunis, Tunis 1002, Tunisia; (N.B.); (S.M.); (F.C.)
| | - Eduard Llobet
- Microsystems Nanotechnologies for Chemical Analysis (MINOS), Universitat Rovira i Virgili, Avda. Països Catalans, 26, 43007 Tarragona, Spain;
| | - Juan Casanova-Chafer
- Microsystems Nanotechnologies for Chemical Analysis (MINOS), Universitat Rovira i Virgili, Avda. Països Catalans, 26, 43007 Tarragona, Spain;
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11
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Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS Membranes. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10060213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Anthropogenic toxic vapour and gases are a worldwide threat for human health and to the environment. Therefore, it is crucial to develop highly sensitive devices that guarantee their rapid detection. Here, we prepared redox-switchable colloids by the in-situ reduction of 2,3,5-triphenyl-2H-tetrazolium (TTC) into triphenyl formazan (TF) stabilised with Pluronic F127 in aqueous media. The colloids were readily embedded in polydimethylsiloxane (PDMS) to produce a selective colour-switchable membrane for nitrogen dioxide (NO2) detection. We found that the TTC reduction resulted in the production of red-coloured colloids with zeta potential between −1 to 3 mV and hydrodynamic diameters between 114 to 305 nm as hydrophobic dispersion in aqueous media stabilised by Pluronic at different molar concentrations. Moreover, the embedded colloids rendered highly homogenous red colour gas-permeable PDMS elastomeric membrane. Once exposed to NO2, the membrane began to bleach after 30 s due to the oxidation of the embedded TF and undergo a complete decolouration after 180 s. Such features allowed the membrane integration in a low-cost sensing device that showed a high sensitivity and low detection limit to NO2.
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12
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Application of Response Surface Methodology for Optimization of Nanosized Zinc Oxide Synthesis Conditions by Electrospinning Technique. NANOMATERIALS 2022; 12:nano12101733. [PMID: 35630955 PMCID: PMC9144791 DOI: 10.3390/nano12101733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/10/2022] [Accepted: 05/16/2022] [Indexed: 11/21/2022]
Abstract
Zinc oxide (ZnO) is a well-known semiconductor material due to its excellent electrical, mechanical, and unique optical properties. ZnO nanoparticles are widely used for the industrial-scale manufacture of microelectronic and optoelectronic devices, including metal oxide semiconductor (MOS) gas sensors, light-emitting diodes, transistors, capacitors, and solar cells. This study proposes optimization of synthesis parameters of nanosized ZnO by the electrospinning technique. A Box–Behnken design (BB) has been applied using response surface methodology (RSM) to optimize the selected electrospinning and sintering conditions. The effects of the applied voltage, tip-to-collector distance, and annealing temperature on the size of ZnO particles were successfully investigated. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirm the formation of polyvinylpyrrolidone-zinc acetate (PVP-ZnAc) fibers and nanostructured ZnO after annealing. X-ray diffraction (XRD) patterns indicate a pure phase of the hexagonal structure of ZnO with high crystallinity. Minimal-sized ZnO nanoparticles were synthesized at a constant applied potential of 16 kV, with a distance between collector and nozzle of 12 cm, flow rate of 1 mL/h, and calcination temperature of 600 °C. The results suggest that nanosized ZnO with precise control of size and morphology can be fabricated by varying electrospinning conditions, precursor solution concentration, and sintering temperature.
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13
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UV-Activated NO2 Gas Sensing by Nanocrystalline ZnO: Mechanistic Insights from Mass Spectrometry Investigations. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10040147] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In this work, the photostimulated processes of O2 and NO2 molecules with the surface of ZnO under UV radiation were studied by in situ mass spectrometry in the temperature range of 30–100 ∘C. Nanocrystalline needle-like ZnO was synthesized by decomposition of basic zinc carbonate at 300 ∘C, and the surface concentration of oxygen vacancies in it were controlled by reductive post-annealing in an inert gas at 170 ∘C. The synthesized materials were characterized by XRD, SEM, low-temperature nitrogen adsorption (BET), XPS, Raman spectroscopy, and PL spectroscopy. Irradiation of samples with UV light causes the photoabsorption of both O2 and NO2. The photoadsorption properties of ZnO are compared with its defective structure and gas-sensitive properties to NO2. A model of the sensor response of ZnO to NO2 under UV photoactivation is proposed.
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14
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Song L, Zhang J, Li H, Tang X. Enhanced ethanol gas sensing properties of hierarchical porous SnO 2-ZnO microspheres at low working temperature. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2022.2048006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Liming Song
- College of Physics, Jilin University, Changchun, P.R. China
- Key Laboratory of Advanced Materials of Ministry of Education, School of Material Science and Engineering, Tsinghua University, Beijing, P.R. China
| | - Jiarui Zhang
- College of Chemistry and Chemical Engineering, Anhui University, Hefei, P.R. China
| | - Haiying Li
- College of Physics, Jilin University, Changchun, P.R. China
| | - Xiaonian Tang
- College of Physics, Jilin University, Changchun, P.R. China
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15
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Rahman H, Kumar V, Singh P, Kumar A. Catalytic effect of silver nanoparticles on ZnO surface for CO gas-sensing applications. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02423-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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16
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Kabure A, Shirke B, Mane S, Garadkar K. Microwave-assisted sol-gel synthesis of CeO2–NiO nanocomposite based NO2 gas sensor for selective detection at lower operating temperature. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Joshi N, Long H, Naik P, Kumar A, Mastelaro VR, Novais Oliveira, Jr. O, Zettl A, Lin L. Zinc stannate microcubes with integrated microheater for low-temperature NO2 detection. NEW J CHEM 2022. [DOI: 10.1039/d2nj02709g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper reports a facile technique to construct an oxide nanostructured film on a low-power microheater sensor platform to detect the NO2 gas with high sensitivity and selectivity at a...
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18
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Zhang X, Du W, Li Q, Lv C. Highly efficient ethanol vapour detection using g-C 3N 4/ZnO micro flower-like heterostructural composites. RSC Adv 2022; 12:20618-20627. [PMID: 35919170 PMCID: PMC9289812 DOI: 10.1039/d2ra02609k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 07/12/2022] [Indexed: 11/24/2022] Open
Abstract
This work proposes precursor pyrolysis, ultrasonic exfoliation and hydrothermal methods as well as high-temperature calcination strategies to fabricate heterostructured g-C3N4/ZnO composites with excellent ethanol vapour sensing properties. The structure, composition and morphology of the as-prepared g-C3N4/ZnO composites were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). Then, the sensing properties of the g-C3N4/ZnO composites for ethanol (C2H5OH) were studied, and g-C3N4 doping with different mass ratios was used to control the gas-sensing properties of the composites. Compared with pure ZnO and g-C3N4, the performance of g-C3N4 with 1% doping content is the best, and the gas sensing activity of the 1% g-C3N4/ZnO composite is greatly improved at the optimal working temperature (280 °C). The response to 100 ppm ethanol reaches 81.4, which is 3.7 times that of the pure ZnO-based sensor under the same conditions. In addition, the sensor has good selectivity as well as fast response and recovery speeds (24 s and 63 s, respectively). Finally, a reasonable gas sensing enhancement mechanism is proposed, and it is believed that the constructed g-C3N4/ZnO micro flower-like heterostructure and the distinct positions of the valence and conduction bands of ZnO and g-C3N4 lead to the obtained sensor exhibiting a large specific surface area and increased conductivity, thereby improving the g-C3N4/ZnO-based sensor sensing performance. Heterostructural g-C3N4/ZnO composites were synthesized through a facile hydrothermal strategy using as-prepared g-C3N4 nanosheets and precursor solutions of ZnO for effective ethanol detection.![]()
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Affiliation(s)
- Xianfeng Zhang
- Anhui Provincial Engineering Laboratory of Silicon-based Materials, School of Material and Chemical Engineering, Bengbu University, Bengbu 233030, People's Republic of China
| | - Wenjie Du
- Anhui Provincial Engineering Laboratory of Silicon-based Materials, School of Material and Chemical Engineering, Bengbu University, Bengbu 233030, People's Republic of China
| | - Qian Li
- Anhui Provincial Engineering Laboratory of Silicon-based Materials, School of Material and Chemical Engineering, Bengbu University, Bengbu 233030, People's Republic of China
| | - Changpeng Lv
- Anhui Provincial Engineering Laboratory of Silicon-based Materials, School of Material and Chemical Engineering, Bengbu University, Bengbu 233030, People's Republic of China
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19
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Geng X, Liu X, Mawella-Vithanage L, Hewa-Rahinduwage CC, Zhang L, Brock SL, Tan T, Luo L. Photoexcited NO 2 Enables Accelerated Response and Recovery Kinetics in Light-Activated NO 2 Gas Sensing. ACS Sens 2021; 6:4389-4397. [PMID: 34784175 DOI: 10.1021/acssensors.1c01694] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Slow response and recovery kinetics is a major challenge for practical room-temperature NO2 gas sensing. Here, we report the use of visible light illumination to significantly shorten the response and recovery times of a PbSe quantum dot (QD) gel sensor by 21% (to 27 s) and 63% (to 102 s), respectively. When combined with its high response (0.04%/ppb) and ultralow limit of detection (3 ppb), the reduction in response and recovery time makes the PbSe QD gel sensor among the best p-type room-temperature NO2 sensors reported to date. A combined experimental and theoretical investigation reveals that the accelerated response and recovery time is primarily due to photoexcitation of NO2 gaseous molecules and adsorbed NO2 on the gel surface, rather than the excitation of the semiconductor sensing material, as suggested by the currently prevailing light-activated gas-sensing theory. Furthermore, we find that the extent of improvement attained in the recovery speed also depends on the distribution of excited electrons in the adsorbed NO2/QD gel system. This work suggests that the design of light-activated sensor platforms may benefit from a careful assessment of the photophysics of the analyte in the gas phase and when adsorbed onto the semiconductor surface.
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Affiliation(s)
- Xin Geng
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Xiaolong Liu
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
| | | | | | - Liang Zhang
- School of Vehicle and Mobility, Tsinghua University, Beijing 100084, China
- Center for Combustion Energy, Tsinghua University, Beijing 100084, China
| | - Stephanie L. Brock
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Ting Tan
- Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
| | - Long Luo
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
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20
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Sanchez-Martın S, Olaizola SM, Castaño E, Mandayo GG, Ayerdi I. Low temperature NO 2 gas sensing with ZnO nanostructured by laser interference lithography. RSC Adv 2021; 11:34144-34151. [PMID: 35497283 PMCID: PMC9042366 DOI: 10.1039/d1ra06316b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/14/2021] [Indexed: 11/21/2022] Open
Abstract
ZnO conductometric gas sensors have been widely studied due to their good sensitivity, cost-efficiency, long stability and simple fabrication. This work is focused on NO2 sensing, which is a toxic and irritating gas. The developed sensor consists of interdigitated electrodes covered by a ZnO sensing layer. ZnO has been grown by means of the aerosol assisted chemical vapor deposition technique and then nanostructured by laser interference lithography with a UV laser. The SEM and XRD results show vertically oriented growth of ZnO grains and a 2D periodic nanopatterning of the material with a period of 800 nm. Nanostructuring lowers the base resistance of the developed sensors and modifies the sensor response to NO2. Maximum sensitivity is obtained at 175 °C achieving a change of 600% in sensor resistance for 4 ppm NO2versus a 400% change for the non-nanostructured material. However, the most relevant results have been obtained at temperatures below 125 °C. While the non-nanostructured material does not respond to NO2 at such low temperatures, nanostructured ZnO allows NO2 sensing even at room temperature. The room temperature sensing capability possibly derives from the increase of both the surface defects and the surface-to-volume ratio. The long stability and the gas sensing under humid conditions have also been tested, showing improvements of sensitivity for the nanostructured sensors. ZnO gas sensing improvement due to laser interference nanostructuration.![]()
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Affiliation(s)
- Sergio Sanchez-Martın
- CEIT-Basque Research and Technology Alliance (BRTA) Manuel Lardizabal 15 20018. Donostia/San Sebastián Spain .,Universidad de Navarra, Tecnun Manuel Lardizabal 13 20018 Donostia/San Sebastián Spain
| | - S M Olaizola
- CEIT-Basque Research and Technology Alliance (BRTA) Manuel Lardizabal 15 20018. Donostia/San Sebastián Spain .,Universidad de Navarra, Tecnun Manuel Lardizabal 13 20018 Donostia/San Sebastián Spain
| | - E Castaño
- CEIT-Basque Research and Technology Alliance (BRTA) Manuel Lardizabal 15 20018. Donostia/San Sebastián Spain .,Universidad de Navarra, Tecnun Manuel Lardizabal 13 20018 Donostia/San Sebastián Spain
| | - G G Mandayo
- CEIT-Basque Research and Technology Alliance (BRTA) Manuel Lardizabal 15 20018. Donostia/San Sebastián Spain .,Universidad de Navarra, Tecnun Manuel Lardizabal 13 20018 Donostia/San Sebastián Spain
| | - I Ayerdi
- CEIT-Basque Research and Technology Alliance (BRTA) Manuel Lardizabal 15 20018. Donostia/San Sebastián Spain .,Universidad de Navarra, Tecnun Manuel Lardizabal 13 20018 Donostia/San Sebastián Spain
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21
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Minh LH, Thuy Thu PT, Thanh BQ, Hanh NT, Thu Hanh DT, Van Toan N, Hung CM, Van Duy N, Van Tong P, Hoa ND. Hollow ZnO nanorices prepared by a simple hydrothermal method for NO 2 and SO 2 gas sensors. RSC Adv 2021; 11:33613-33625. [PMID: 35497546 PMCID: PMC9042311 DOI: 10.1039/d1ra05912b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/08/2021] [Indexed: 12/02/2022] Open
Abstract
Chemoresistive gas sensors play an important role in detecting toxic gases for air pollution monitoring. However, the demand for suitable nanostructures that could process high sensing performance remains high. In this study, hollow ZnO nanorices were synthesized by a simple hydrothermal method to detect NO2 and SO2 toxic gases efficiently. Material characterization by some advanced techniques, such as scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy, demonstrated that the hollow ZnO nanorices had a length and diameter size of less than 500 and 160 nm, respectively. In addition, they had a thin shell thickness of less than 30 nm, formed by an assembly of tiny nanoparticles. The sensor based on the hollow ZnO nanorices could detect low concentration of NO2 and SO2 gasses at sub-ppm level. At an optimum operating temperature of 200 °C, the sensor had response values of approximately 15.3 and 4.8 for 1 ppm NO2 and 1 ppm SO2, respectively. The sensor also exhibited good stability and selectivity, suggesting that the sensor can be applied to NO2 and SO2 toxic gas detection in ambient air. Hollow ZnO nanorices with an ultrathin shell show excellent response to NO2 and SO2 gases.![]()
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Affiliation(s)
- Luu Hoang Minh
- Department of Physics, Faculty of Mechanical Engineering, National University of Civil Engineering (NUCE) No. 55, Giai Phong Str. Hanoi Vietnam .,International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No. 1, Dai Co Viet Hanoi Vietnam
| | - Pham Thi Thuy Thu
- Department of Physics, Faculty of Mechanical Engineering, National University of Civil Engineering (NUCE) No. 55, Giai Phong Str. Hanoi Vietnam
| | - Bui Quang Thanh
- Department of Physics, Faculty of Mechanical Engineering, National University of Civil Engineering (NUCE) No. 55, Giai Phong Str. Hanoi Vietnam
| | - Nguyen Thi Hanh
- Department of Physics, Faculty of Mechanical Engineering, National University of Civil Engineering (NUCE) No. 55, Giai Phong Str. Hanoi Vietnam
| | - Do Thi Thu Hanh
- Department of Physics, Faculty of Mechanical Engineering, National University of Civil Engineering (NUCE) No. 55, Giai Phong Str. Hanoi Vietnam
| | - Nguyen Van Toan
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No. 1, Dai Co Viet Hanoi Vietnam
| | - Chu Manh Hung
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No. 1, Dai Co Viet Hanoi Vietnam
| | - Nguyen Van Duy
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No. 1, Dai Co Viet Hanoi Vietnam
| | - Pham Van Tong
- Department of Physics, Faculty of Mechanical Engineering, National University of Civil Engineering (NUCE) No. 55, Giai Phong Str. Hanoi Vietnam
| | - Nguyen Duc Hoa
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No. 1, Dai Co Viet Hanoi Vietnam
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22
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Li J, Yang M, Cheng X, Zhang X, Guo C, Xu Y, Gao S, Major Z, Zhao H, Huo L. Fast detection of NO 2 by porous SnO 2 nanotoast sensor at low temperature. JOURNAL OF HAZARDOUS MATERIALS 2021; 419:126414. [PMID: 34182421 DOI: 10.1016/j.jhazmat.2021.126414] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 05/30/2021] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
In order to challenge high working temperature, low response and low selectivity of present NO2 sensor, porous SnO2 nanotoasts with a large surface area (79.94 m2/g) were synthesized. Thick film sensors fabricated by the SnO2 nanotoasts exhibited a high response to NO2 gas operating at room temperature. Excellent performance for NO2 sensing gas at 50 °C, included the high response of 105.2 (10 ppm), low detection limitation of 0.1 ppm, fast response within 10 s, and wide range of 0.1-10 ppm (R2 = 0.9931). These sensors also demonstrated perfect selectivity, moisture resistance and 90 days of long-term stability. SnO2 nanotoasts sensor has excellent detection ability in actual detection. The superior response of porous SnO2 nanotoasts towards NO2 was attributed to the special porous structure with large specific surface area and oxygen vacancies in sensing material, which helped adsorption of the target gas molecules onto the sensing surfaces and transfer of the charge.
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Affiliation(s)
- Ji Li
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Ming Yang
- College of Science, Heihe College, Heihe 164300, China
| | - Xiaoli Cheng
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Xianfa Zhang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Chuanyu Guo
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Yingming Xu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China.
| | - Shan Gao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China.
| | - Zoltán Major
- Institute of Polymer Product Engineering, Johannes Kepler University Linz, Linz, Austria
| | - Hui Zhao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Lihua Huo
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China.
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23
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Pleshek D, Tran J, Li Y, Shirani A, Shevchenko EV, Berman D. Swelling-Assisted Sequential Infiltration Synthesis of Nanoporous ZnO Films with Highly Accessible Pores and Their Sensing Potential for Ethanol. ACS APPLIED MATERIALS & INTERFACES 2021; 13:35941-35948. [PMID: 34297538 DOI: 10.1021/acsami.1c08225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Here, we report a swelling-assisted sequential infiltration synthesis (SIS) approach for the design of highly porous zinc oxide (ZnO) films by infiltration of block copolymer templates such as polystyrene-block-polyvinyl pyridine with inorganic precursors followed by UV ozone-assisted removal of the polymer template. We show that porous ZnO coatings with the thickness in the range between 140 and 420 nm can be obtained using only five cycles of SIS. The pores in ZnO fabricated via swelling-assisted SIS are highly accessible, and up to 98% of pores are available for solvent penetration. The XPS data indicate that the surface of nanoporous ZnO films is terminated with -OH groups. Density functional theory calculations show a lower energy barrier for ethanol-induced release of the oxygen restricted depletion layer in the case of the presence of -OH groups at the ZnO surface, and hence, it can lead to higher sensitivity in sensing of ethanol. We monitored the response of ZnO porous coatings with different thicknesses and porosities to ethanol vapors using combined mass-based and chemiresistive approaches at room temperature and 90 °C. The porous ZnO conformal coatings reveal a promising sensitivity toward detection of ethanol at low temperatures. Our results suggest the excellent potential of the SIS approach for the design of conformal ZnO coatings with controlled porosity, thickness, and composition that can be adapted for sensing applications.
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Affiliation(s)
- Daniel Pleshek
- Materials Science and Engineering Department and Advanced Materials and Manufacturing Processes Institute, University of North Texas, 1155 Union Circle, Denton, Texas 76203, United States
| | - John Tran
- Materials Science and Engineering Department and Advanced Materials and Manufacturing Processes Institute, University of North Texas, 1155 Union Circle, Denton, Texas 76203, United States
| | - Yuzhe Li
- Materials Science and Engineering Department and Advanced Materials and Manufacturing Processes Institute, University of North Texas, 1155 Union Circle, Denton, Texas 76203, United States
| | - Asghar Shirani
- Materials Science and Engineering Department and Advanced Materials and Manufacturing Processes Institute, University of North Texas, 1155 Union Circle, Denton, Texas 76203, United States
| | - Elena V Shevchenko
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Ave, Lemont, Illinois 60439, United States
- Department of Chemistry and James Frank Institute, University of Chicago, Chicago, Illinois 60637 United States
| | - Diana Berman
- Materials Science and Engineering Department and Advanced Materials and Manufacturing Processes Institute, University of North Texas, 1155 Union Circle, Denton, Texas 76203, United States
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24
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Masteghin MG, Silva RA, Cox DC, Godoi DRM, Silva SRP, Orlandi MO. The role of surface stoichiometry in NO 2 gas sensing using single and multiple nanobelts of tin oxide. Phys Chem Chem Phys 2021; 23:9733-9742. [PMID: 33870400 DOI: 10.1039/d1cp00662b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Typically used semiconducting metal oxides (SMOs) consist of several varying factors that affect gas sensor response, including film thickness, grain size, and notably the grain-grain junctions within the active device volume, which complicates the analysis and optimisation of sensor response. In comparison, devices containing a single nanostructured element do not present grain-grain junctions, and therefore present an excellent platform to comprehend the correlation between nanostructure surface stoichiometry and sensor response to the depletion layer (Debye length, LD) variation after the analyte gas adsorption/chemisorption. In this work, nanofabricated devices containing SnO2 and Sn3O4 individual nanobelts of different thicknesses were used to estimate their LD after NO2 exposure. In the presence of 40 ppm of NO2 at 150 °C, LD of 12 nm and 8 nm were obtained for SnO2 and Sn3O4, respectively. These values were associated to the sensor signals measured using multiple nanobelts onto interdigitated electrodes, outlining that the higher sensor signal of the Sn4+ surface (up to 708 for 100 ppm NO2 at 150°) in comparison with the Sn2+ (up to 185) can be explained based on a less depleted initial state and a lower surface electron affinity caused by the Lewis acid/base interactions with oxygen species from the baseline gas. To support the proposed mechanisms, we investigated the gas sensor response of SnO2 nanobelts with a higher quantity of oxygen vacancies and correlated the results to the SnO system.
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Affiliation(s)
- Mateus G Masteghin
- Advanced Technology Institute, Dept. of Electrical & Electronic Engineering, University of Surrey, Guildford, GU2 7XH, UK.
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25
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Mehta SS, Nadargi DY, Tamboli MS, Alshahrani T, Minnam Reddy VR, Kim ES, Mulla IS, Park C, Suryavanshi SS. RGO/WO 3 hierarchical architectures for improved H 2S sensing and highly efficient solar-driving photo-degradation of RhB dye. Sci Rep 2021; 11:5023. [PMID: 33658543 PMCID: PMC7930058 DOI: 10.1038/s41598-021-84416-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 02/15/2021] [Indexed: 11/22/2022] Open
Abstract
Surface area and surface active sites are two important key parameters in enhancing the gas sensing as well as photocatalytic properties of the parent material. With this motivation, herein, we report a facile synthesis of Reduced Graphene Oxide/Tungsten Oxide RGO/WO3 hierarchical nanostructures via simple hydrothermal route, and their validation in accomplishment of improved H2S sensing and highly efficient solar driven photo-degradation of RhB Dye. The self-made RGO using modified Hummer's method, is utilized to develop the RGO/WO3 nanocomposites with 0.15, 0.3 and 0.5 wt% of RGO in WO3 matrix. As-developed nanocomposites were analyzed using various physicochemical techniques such as XRD, FE-SEM, TEM/HRTEM, and EDAX. The creation of hierarchic marigold frameworks culminated in a well affiliated mesoporous system, offering efficient gas delivery networks, leading to a significant increase in sensing response to H2S. The optimized sensor (RGO/WO3 with 0.3 wt% loading) exhibited selective response towards H2S, which is ~ 13 times higher (Ra/Rg = 22.9) than pristine WO3 (Ra/Rg = 1.78) sensor. Looking at bi-directional application, graphene platform boosted the photocatalytic activity (94% degradation of Rhodamine B dye in 210 min) under natural sunlight. The RGO's role in increasing the active surface and surface area is clarified by the H2S gas response analysis and solar-driven photo-degradation of RhB dye solution. The outcome of this study provides the new insights to RGO/WO3 based nanocomposites' research spreadsheet, in view of multidisciplinary applications.
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Affiliation(s)
- Swati S Mehta
- School of Physical Sciences, PAH Solapur University, Solapur, MS, 413255, India
| | - Digambar Y Nadargi
- School of Physical Sciences, PAH Solapur University, Solapur, MS, 413255, India.
| | - Mohaseen S Tamboli
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, 38541, Republic of Korea
| | - Thamraa Alshahrani
- Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, 11671, Saudi Arabia
| | | | - Eui Seon Kim
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, 38541, Republic of Korea
| | - Imtiaz S Mulla
- Former Emeritus Scientist (CSIR), Centre for Materials for Electronics Technology, Pune, 411008, India
| | - Chinho Park
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, 38541, Republic of Korea.
| | - Sharad S Suryavanshi
- School of Physical Sciences, PAH Solapur University, Solapur, MS, 413255, India.
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26
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Fioravanti A, Marani P, Morandi S, Lettieri S, Mazzocchi M, Sacerdoti M, Carotta MC. Growth Mechanisms of ZnO Micro-Nanomorphologies and Their Role in Enhancing Gas Sensing Properties. SENSORS (BASEL, SWITZERLAND) 2021; 21:1331. [PMID: 33668546 PMCID: PMC7918259 DOI: 10.3390/s21041331] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 11/16/2022]
Abstract
Zinc oxide (ZnO) is one of the main functional materials used to realize chemiresistive gas sensors. In addition, ZnO can be grown through many different methods obtaining the widest family of unique morphologies. However, the relationship between the ZnO morphologies and their gas sensing properties needs more detailed investigations, also with the aim to improve the sensor performances. In this work, seven nanoforms (such as leaves, bisphenoids, flowers, needles, etc.) were prepared through simple wet chemical synthesis. Morphological and structural characterizations were performed to figure out their growth mechanisms. Then, the obtained powders were deposited through screen-printing technique to realize thick film gas sensors. The gas sensing behavior was tested toward some traditional target gases and some volatile organic compounds (acetone, acetaldehyde, etc.) and compared with ZnO morphologies. Results showed a direct correlation between the sensors responses and the powders features (morphology and size), which depend on the specific synthesis process. The sensors can be divided in two behavioral classes, following the two main morphology kinds: aggregates of nanocrystals (leaves and bisphenoids), exhibiting best performances versus all tested gases and monocrystal based (stars, needle, long needles, flowers, and prisms).
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Affiliation(s)
- Ambra Fioravanti
- Istituto di Scienze e Tecnologie per l’Energia e la Mobilità Sostenibili (CNR–STEMS), Via Canal Bianco 28, 44124 Ferrara, Italy;
| | - Pietro Marani
- Istituto di Scienze e Tecnologie per l’Energia e la Mobilità Sostenibili (CNR–STEMS), Via Canal Bianco 28, 44124 Ferrara, Italy;
| | - Sara Morandi
- Dipartimento di Chimica, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy;
| | - Stefano Lettieri
- Istituto di Scienze Applicate e Sistemi Intelligenti “E. Caianiello” (CNR-ISASI), Complesso Universitario di Monte S. Angelo, Via Cupa Cintia 21, 80126 Napoli, Italy;
| | - Mauro Mazzocchi
- Istituto di Geoscienze e Georisorse (CNR-IGG), Via G. La Pira 4, 50121 Firenze, Italy;
| | - Michele Sacerdoti
- Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Via Saragat 1, 44122 Ferrara, Italy;
| | - Maria Cristina Carotta
- Istituto di Scienze e Tecnologie per l’Energia e la Mobilità Sostenibili (CNR–STEMS), Via Canal Bianco 28, 44124 Ferrara, Italy;
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