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Zhu S, Fan H, Lei L, Fan Y, Wang W. High sensitivity and selectivity of h-BN/WO 3 n-n heterojunction to triethylamine at low-temperature. CHEMOSPHERE 2024; 366:143522. [PMID: 39395477 DOI: 10.1016/j.chemosphere.2024.143522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2024] [Revised: 09/06/2024] [Accepted: 10/09/2024] [Indexed: 10/14/2024]
Abstract
Due to the unique properties of heterojunction interfaces, heterojunction materials have broad application prospects in gas sensors. In this work, a facile and economical two-step synthesis method was employed to fabricate h-BN/WO3 heterojunctions, exhibiting excellent performance in triethylamine (TEA) detection. The results indicate that compared to pure WO3 sensors, h-BN/WO3 sensors exhibit superior TEA sensing capabilities, with an excellent response of 281.45 to 20 ppm TEA at 100 °C, which is 3.4 times higher. Moreover, h-BN/WO3 sensors demonstrate favorable response times, low detection limits, and good stability. These significant enhancements are attributed to the increase in oxygen vacancies and the establishment of heterojunctions between h-BN and WO3. Heterojunctions can regulate the concentration and transport rate of charge carriers, as well as the interface potential barrier, thereby affecting the gas sensing processes. This work may promote the further development of sensing materials and the practical application of WO3 sensors in TEA detection.
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Affiliation(s)
- Shuwen Zhu
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnic University, Xi'an, 710072, China
| | - Huiqing Fan
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnic University, Xi'an, 710072, China.
| | - Lin Lei
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnic University, Xi'an, 710072, China
| | - Yongbo Fan
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, 100872, Hong Kong, China
| | - Weijia Wang
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnic University, Xi'an, 710072, China.
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Huang JY, Li HJ, Li LX, Chen R, Liu F, Wu L, Feng ZM, Yin YL, Cao Z, Yu D. Sensitive detection of H 2S based on Ce doped ZnCo 2O 4 hollow microspheres at low working temperature. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:4644-4652. [PMID: 38946403 DOI: 10.1039/d4ay00567h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
In order to develop a highly efficient H2S gas sensor at low working temperature, in this work, a kind of novel Ce-doped ZnCo2O4 hollow microspheres (Ce/ZnCo2O4 HMSs) were successfully synthesized using a template-free one-pot method, showing a sensitive response toward H2S. The microstructure and morphology of the material were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The gas-sensing performance of the composite was investigated, showing that the ZnCo2O4 doped with 6 mol% Ce had the highest response to 20 ppm H2S at a low operating temperature of 160 °C with a response value of 67.42, which was about 2 times higher than that of original ZnCo2O4. The prepared Ce/ZnCo2O4 HMS sensor in response to H2S exhibited a linear range of 0.1-200 ppm with a low detection limit of 0.1 ppm under the conditions of ambient humidity of 45% and ambient temperature of 20 °C. Meanwhile, it also possessed good selectivity, repeatability and reproducibility. The response value of the sensor decreased by 5.32% after 7 months of continuous monitoring of H2S in an atmospheric environment of a pig farm, indicating that the sensor had a long-term stability and continuous service life with important application prospects.
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Affiliation(s)
- Jia-Ying Huang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Hao-Jun Li
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Lin-Xuan Li
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Rong Chen
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Fang Liu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Ling Wu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Ze-Meng Feng
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Yu-Long Yin
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Zhong Cao
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Donghong Yu
- Department of Chemistry and Bioscience, Aalborg University, DK-9220 Aalborg, East, Denmark.
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Kanan S, Obeideen K, Moyet M, Abed H, Khan D, Shabnam A, El-Sayed Y, Arooj M, Mohamed AA. Recent Advances on Metal Oxide Based Sensors for Environmental Gas Pollutants Detection. Crit Rev Anal Chem 2024:1-34. [PMID: 38506453 DOI: 10.1080/10408347.2024.2325129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Optimizing materials and associated structures for detecting various environmental gas pollutant concentrations has been a major challenge in environmental sensing technology. Semiconducting metal oxides (SMOs) fabricated at the nanoscale are a class of sensor technology in which metallic species are functionalized with various dopants to modify their chemiresistivity and crystalline scaffolding properties. Studies focused on recent advances of gas sensors utilizing metal oxide nanostructures with a special emphasis on the structure-surface property relationships of some typical n-type and p-type SMOs for efficient gas detection are presented. Strategies to enhance the gas sensor performances are also discussed. These oxide material sensors have several advantages such as ease of handling, portability, and doped-based SMO sensing detection ability of environmental gas pollutants at low temperatures. SMO sensors have displayed excellent sensitivity, selectivity, and robustness. In addition, the hybrid SMO sensors showed exceptional selectivity to some CWAs when irradiated with visible light while also displaying high reversibility and humidity independence. Results showed that TiO2 surfaces can sense 50 ppm SO2 in the presence of UV light and under operating temperatures of 298-473 K. Hybrid SMO displayed excellent gas sensing response. For example, a CuO-ZnO nanoparticle network of a 4:1 vol.% CuO/ZnO ratio exhibited responses three times greater than pure CuO sensors and six times greater than pure ZnO sensors toward H2S. This review provides a critical discussion of modified gas pollutant sensing capabilities of metal oxide nanoparticles under ambient conditions, focusing on reported results during the past two decades on gas pollutants sensing.
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Affiliation(s)
- Sofian Kanan
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, UAE
| | - Khaled Obeideen
- Sustainable Energy and Power Systems Research Center, RISE, University of Sharjah, Sharjah, UAE
| | - Matthew Moyet
- School of Biology and Ecology, University of Maine, Orono, Maine, USA
| | - Heba Abed
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, UAE
| | - Danyah Khan
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, UAE
| | - Aysha Shabnam
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, UAE
| | | | - Mahreen Arooj
- Department of Chemistry, University of Sharjah, Sharjah, UAE
| | - Ahmed A Mohamed
- Department of Chemistry, University of Sharjah, Sharjah, UAE
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Amu-Darko JNO, Hussain S, Zhang X, Ouladsmane M, Issaka E, Ali S, Wang M, Qiao G. Exploring the gas-sensing properties of MOF-derived TiN@CuO as a hydrogen sulfide sensor. CHEMOSPHERE 2023; 337:139401. [PMID: 37423407 DOI: 10.1016/j.chemosphere.2023.139401] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/06/2023] [Accepted: 06/30/2023] [Indexed: 07/11/2023]
Abstract
In an effort to develop a long-lasting gas sensor, this article presents titanium nitride (TiN) as a potential substitute sensitive material in conjunction with (copper(II) benzene-1,3,5-tricarboxylate) Cu-BTC-derived CuO. The work focused on the gas-sensing characteristics of TiN/CuO nanoparticles in detecting H2S gas at various temperatures and concentrations. XRD, XPS, and SEM were utilized to analyze the composites with varied Cu molar ratios. The responses of TiN/CuO-2 nanoparticles to 50 and 100 ppm H2S gas at 50 °C and 250 °C are 34.8 and 60.0, respectively. The related sensor had high selectivity and stability towards H2S, and the response of TiN/CuO-2 is still 2.5-5 ppm H2S. The gas-sensing properties as well as the mechanism are fully explained in this study. TiN/CuO might be a choice for the detection of H2S gas, opening up new avenues for applications in industries, medical facilities, and homes.
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Affiliation(s)
| | - Shahid Hussain
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Xiangzhao Zhang
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Mohamed Ouladsmane
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Eliasu Issaka
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Salman Ali
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Mingsong Wang
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Guanjun Qiao
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
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Hussain S, Okai Amu-Darko JN, Wang M, Alothman AA, Ouladsmane M, Aldossari SA, Khan MS, Qiao G, Liu G. CuO-decorated MOF derived ZnO polyhedral nanostructures for exceptional H 2S gas detection. CHEMOSPHERE 2023; 317:137827. [PMID: 36646181 DOI: 10.1016/j.chemosphere.2023.137827] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/07/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Considering that H2S is a hazardous gas that poses a significant risk to people's lives, research into H2S gas sensors has garnered a lot of interest. This work reports a CuO/ZnO multifaceted nanostructures(NS) created by heat treating Cu2+/ZIF-8 impregnation precursors, and their microstructure and gas sensing characteristics were examined using various characterization techniques (XRD, XPS, SEM, TEM, and BET). The as-prepared hollow CuO/ZnO multifunctional nanostructures had a high gas response value (425@50 ppm H2S gas), quick response and recovery times (57/191s @20 ppm), a low limit of detection (1.6@500 ppb H2S), good humidity resistance and highly selective towards H2S gas. The hollow CuO/ZnO multifaceted nanostructures possessed enhanced gas sensing capabilities which may be related to their porous hollow nanostructures, the manufactured p-CuO/n-ZnO heterojunctions, and the spillover effect between CuO and H2S.
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Affiliation(s)
- Shahid Hussain
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | | | - Mingsong Wang
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Asma A Alothman
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mohamed Ouladsmane
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Samar A Aldossari
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Muhammad Shahzeb Khan
- Department of Chemistry and Technology of Functional Materials, Gdansk University of Technology, Faculty of Chemistry, Narutowicza 11/12, 80-233, Gdansk, Poland
| | - Guanjun Qiao
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Guiwu Liu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
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6
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Okai Amu-Darko JN, Hussain S, Zhang X, Alothman AA, Ouladsmane M, Nazir MT, Qiao G, Liu G. Metal-organic frameworks-derived In 2O 3/ZnO porous hollow nanocages for highly sensitive H 2S gas sensor. CHEMOSPHERE 2023; 314:137670. [PMID: 36581114 DOI: 10.1016/j.chemosphere.2022.137670] [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: 10/17/2022] [Revised: 11/28/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
The detection of hydrogen sulfide (H2S) is critical because of its potential harm and widespread presence in the oil and gas sectors. The zeolitic imidazolate framework-8 (ZIF-8) derived ZnO nanostructures manufactured as gas sensors have exceptional sensitivity and selectivity for H2S gas. In/Zn-ZIF-8 template material was synthesized by a simple one-step co-precipitation method followed by thermal annealing in air. The heat treatment resulted in In2O3/ZnO nanostructures with mixed heterostructures. The crystal structure (XRD), morphology (SEM/TEM), chemical state (XPS), surface area (BET), etc were investigated to ascertain the nature of the as-prepared material. SEM imagery revealed that the as-prepared In2O3/ZnO sensitive material had a microstructure of porous hollow nanocages with an average particle size of about 200 nm, which is beneficial to the diffusion and adsorption of gas molecules. The gas sensing performance test results of the In2O3/ZnO hollow nanocages show that their response to H2S gas is significantly improved 67.5 @50 ppm H2S (about 11 times that of pure ZnO nanocages) at an optimal temperature of 200 °C, better selectivity, lower theoretical detection limit and good linearity between gas concentration and response values. The enhanced gas sensing feat to H2S gas is mainly attributed to the formation of n-n heterojunction and the wide surface area of the newly formed In2O3/ZnO porous hollow nanocages.
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Affiliation(s)
| | - Shahid Hussain
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Xiangzhao Zhang
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Asma A Alothman
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mohamed Ouladsmane
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - M Tariq Nazir
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Guanjun Qiao
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Guiwu Liu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
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7
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Khan S, Shah SS, Janjua NK, Yurtcan AB, Nazir MT, Katubi KM, Alsaiari NS. Alumina supported copper oxide nanoparticles (CuO/Al 2O 3) as high-performance electrocatalysts for hydrazine oxidation reaction. CHEMOSPHERE 2023; 315:137659. [PMID: 36603674 DOI: 10.1016/j.chemosphere.2022.137659] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/30/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
Direct hydrazine liquid fuel cell (DHFC) is perceived as effectual energy generating mean owing to high conversion efficiency and energy density. However, the development of well-designed, cost effective and high performance electrocatalysts is the paramount to establish DHFCs as efficient energy generating technology. Herein, gamma alumina supported copper oxide nanocatalysts (CuO/Al2O3) are synthesized via impregnation method and investigated for their electrocatalytic potential towards hydrazine oxidation reaction. CuO with different weight percentages i.e., 4%, 8%, 12%, 16% and 20% are impregnated on gamma alumina support. X-ray diffraction analysis revealed the cubic crystal structure and nanosized particles of the prepared metal oxides. Transmission electron microscopy also referred to the cubic morphology and nanoparticle formation. Electrochemical oxidation potential of the CuO/Al2O3 nanoparticles is explored via cyclic voltammetry as the analytical tool. Optimization of conditions and electrocatalytic studies shown that 16% CuO/Al2O3 presented the best electronic properties towards N2H2 oxidation reaction. BET analysis ascertained the high surface area (131.2546 m2 g1) and large pore diameter (0.279605 cm³ g-1) for 16% CuO/Al2O3. Nanoparticle formation, high porosity and enlarged surface area of the proposed catalysts resulted in significant oxidation current output (600 μA), high current density (8.2 mA cm-2) and low charge transfer resistance (3.7 kΩ). Electrooxidation of hydrazine on such an affordable and novel electrocatalyst opens a gateway to further explore the metal oxide impregnated alumina materials for different electrochemical applications.
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Affiliation(s)
- Safia Khan
- Department of Chemistry, Quaid-i-Azam University Islamabad, 45320, Pakistan; Faculty of Chemical Engineering, Ataturk University, Erzurum, 25240, Turkey.
| | - Syed Sakhawat Shah
- Department of Chemistry, Quaid-i-Azam University Islamabad, 45320, Pakistan.
| | | | | | - Muhammad Tariq Nazir
- School of Manufacturing Engineering, University of New South Wales, Sydney, 2052, Australia
| | - Khadijah Mohammedsaleh Katubi
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, 11671, Saudi Arabia.
| | - Norah Salem Alsaiari
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, 11671, Saudi Arabia.
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8
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Zhu LY, Miao XY, Ou LX, Mao LW, Yuan K, Sun S, Devi A, Lu HL. Heterostructured α-Fe 2 O 3 @ZnO@ZIF-8 Core-Shell Nanowires for a Highly Selective MEMS-Based ppb-Level H 2 S Gas Sensor System. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204828. [PMID: 36310138 DOI: 10.1002/smll.202204828] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Highly selective and sensitive H2 S sensors are in high demand in various fields closely related to human life. However, metal oxide semiconductors (MOSs) suffer from poor selectivity and single MOS@metal organic framework (MOF) core-shell nanocomposites are greatly limited due to the intrinsic low sensitivity of MOF shells. To simultaneously improve both selectivity and sensitivity, heterostructured α-Fe2 O3 @ZnO@ZIF-8 core-shell nanowires (NWs) are meticulously synthesized with the assistance of atomic layer deposition. The ZIF-8 shell with regular pores and special surface functional groups is attractive for excellent selectivity and the heterostructured α-Fe2 O3 @ZnO core with an additional electron depletion layer is promising with enhanced sensitivity compared to a single MOS core. As a result, the heterostructured α-Fe2 O3 @ZnO@ZIF-8 core-shell NWs achieve remarkable H2 S sensing performance with a high response (Rair /Rgas = 32.2 to 10 ppm H2 S), superior selectivity, fast response/recovery speed (18.0/31.8 s), excellent long-term stability (at least over 3 months), and relatively low limit of detection (down to 200 ppb) at low operating temperature of 200 °C, far beyond α-Fe2 O3 @ZIF-8 or α-Fe2 O3 @ZnO core-shell NWs. Furthermore, a micro-electromechanical system-based H2 S gas sensor system with low power consumption is developed, holding great application potential in smart cities.
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Affiliation(s)
- Li-Yuan Zhu
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Xiao-Yong Miao
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Lang-Xi Ou
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Li-Wen Mao
- School of Opto-Electronic Information and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Kaiping Yuan
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, China
| | - Shuhui Sun
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique (INRS), 1650 Boulevard Lionel-Boulet Varennes, Quebec, J3X1S2, Canada
| | - Anjana Devi
- Inorganic Materials Chemistry, Ruhr-University Bochum, 44780, Bochum, Germany
| | - Hong-Liang Lu
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, China
- Yiwu Research Institute of Fudan University, Chengbei Road, Yiwu City, Zhejiang, 322000, China
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Iqbal HMN, Bilal M, Rodriguez-Couto S. Smart nanohybrid constructs: Concept and designing for environmental remediation. CHEMOSPHERE 2022; 301:134616. [PMID: 35447210 DOI: 10.1016/j.chemosphere.2022.134616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
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10
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Synthesis and H2S-Sensing Properties of MOF-Derived Cu-Doped ZnO Nanocages. NANOMATERIALS 2022; 12:nano12152579. [PMID: 35957008 PMCID: PMC9370557 DOI: 10.3390/nano12152579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 02/01/2023]
Abstract
Metal–organic framework (MOF)-derived pure ZnO and Cu-doped ZnO nanocages were fabricated by calcining a zeolitic imidazole framework (ZIF-8) and Cu-doped ZIF-8. The morphology and crystal structure of the samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM). It was found that Cu doping did not change the crystal structures and morphologies of MOF-derived ZnO nanocages. The H2S-sensing properties of the sensors based on ZnO and Cu-doped ZnO nanocages were investigated. The results indicated that the H2S-sensing properties of MOF-derived ZnO nanocages were effectively improved by Cu doping, and the optimal doping content was 3 at%. Moreover, 3 at% Cu-doped ZnO nanocages showed the highest response of 4733 for 5 ppm H2S at 200 °C, and the detection limit could be as low as 20 ppb. The gas-sensing mechanism was also discussed.
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11
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Manganese-doped zinc sulfide microspheres for improved electrocatalytic sensing ability toward carbendazim in food samples. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107204] [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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12
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Wei W, Zhang F, Sun Y, Yue Q, Yu K, Guo W, Qu F. Enhancing triethylamine sensing of ZIF-derived ZnO microspheres arising from cobalt doping and defect engineering. CHEMOSPHERE 2022; 291:132715. [PMID: 34715109 DOI: 10.1016/j.chemosphere.2021.132715] [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: 08/24/2021] [Revised: 10/13/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
Reasonable doping is beneficial to the generation of defects, which is a feasibility strategy to improve the ZnO sensing performance. Herein, we presented an in situ self-sacrificing template strategy for fabricating Co doped h-ZnO core-shell structures (h-ZnO/ZnCox) with different defect contents, pyrolyzing hierarchical porous ZnO (h-ZnO) sub-microspheres coated by zeolite imidazolate frameworks (h-ZnO/ZIF-ZnCox). The investigations of X-ray photoelectron (XPS), photoluminescence (PL) and Raman spectra indicate that donor defects include zinc interstitial (Zni) and oxygen vacancy (VO) in h-ZnO/ZnCox can be tuned by Co dopant (x = 0-30%). Resultantly, the h-ZnO/ZnCox exhibits a significantly enhanced response and selectivity towards triethylamine (TEA), beyond the undoped h-ZnO, and 15% Co-doped h-ZnO (h-ZnO/ZnCo15%) conducts the maximum responses of 1020 to 50 ppm TEA at 573 K, in the top set for the similar type of sensors. Further, the sensing mechanism of h-ZnO/ZnCox is elaborated, possibly resulting from abundant active oxygen species conversed from more oxygen adsorbed which corresponds to cobalt doping generating rich donor-related defects and additional electrons in h-ZnO/ZnCo15%.
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Affiliation(s)
- Wenjing Wei
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China
| | - Feng Zhang
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China; Province and Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, PR China.
| | - Yimeng Sun
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China
| | - Qunfeng Yue
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China
| | - Kai Yu
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China; Province and Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, PR China
| | - Wei Guo
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China
| | - Fengyu Qu
- Key Laboratory of Photochemical Biomaterials and Energy Storage Materials, Heilongjiang, Harbin Normal University, Harbin, 150025, PR China; Province and Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, PR China.
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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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