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Zhang Z, Liang J, Liu K, Tian W, Liang X, Zhao K, Zhang K. Defect-Engineered WO 3-x Architectures Coupled with Random Forest Algorithm Enables Real-Time Seafood Quality Assessment. ACS Sens 2024; 9:4196-4206. [PMID: 39096304 DOI: 10.1021/acssensors.4c01192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2024]
Abstract
Reliable and real-time monitoring of seafood decay is attracting growing interest for food safety and human health, while it is still a great challenge to accurately identify the released triethylamine (TEA) from the complex volatilome. Herein, defect-engineered WO3-x architectures are presented to design advanced TEA sensors for seafood quality assessment. Benefiting from abundant oxygen vacancies, the obtained WO2.91 sensor exhibits remarkable TEA-sensing performance in terms of higher response (1.9 times), faster response time (2.1 times), lower detection limit (3.2 times), and higher TEA/NH3 selectivity (2.8 times) compared with the air-annealed WO2.96 sensor. Furthermore, the definite WO2.91 sensor demonstrates long-term stability and anti-interference in complex gases, enabling the accurate recognition of TEA during halibut decay (0-48 h). Coupled with the random forest algorithm with 70 estimators, the WO2.91 sensor enables accurate prediction of halibut storage with an accuracy of 95%. This work not only provides deep insights into improving gas-sensing performance by defect engineering but also offers a rational solution for reliably assessing seafood quality.
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Affiliation(s)
- Ziqi Zhang
- State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Junxuan Liang
- State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Kai Liu
- State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Weiliang Tian
- Key Laboratory of Chemical Engineering in South Xinjiang, College of Chemistry and Chemical Engineering, Tarim University, Alar 843300, P. R. China
| | - Xu Liang
- State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Kun Zhao
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, P. R. China
| | - Kewei Zhang
- State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
- Key Laboratory of Chemical Engineering in South Xinjiang, College of Chemistry and Chemical Engineering, Tarim University, Alar 843300, P. R. China
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2
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Lin PK, Qin Y, Qi X, Huang L. Improved isoprene detection performance of Si-doped WO 3 films deposited by sputtering and post-annealing. RSC Adv 2024; 14:13618-13627. [PMID: 38665489 PMCID: PMC11043919 DOI: 10.1039/d4ra00184b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
Si-doped WO3 films were sputtered at room temperature and then annealed in air at 500 °C. The Si doping resulted in structural distortion from space group P21/n to Pc. A high density of pores with a diameter of ∼20 nm was observed in the films, which is ideal for gas sensing applications because of the easy diffusion of gas. Isoprene sensitivity, which is defined as the resistance ratio measured in pure air and in air containing 5 ppm isoprene, was greatly improved by the Si doping. The films containing 6.3 at% Si showed the highest sensitivity of 7.7 at a working temperature of 325 °C. However, despite a lower sensitivity of 6.9 measured at 350 °C, the films exhibited better gas selectivity for isoprene over a range of reference gases, including methanol, ethanol, acetone, CO and CO2. The response and recovery times of the films were very short, being less than 1.5 and 3.0 seconds, respectively. Detailed characterization with a range of techniques verified that the increase in gas sensitivity in the Si-doped films was related to better oxygen adsorbability as a consequence of an increase in positively-charged oxygen vacancies introduced by the aliovalent substitution of W6+ by Si4+.
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Affiliation(s)
- Pin-Kuan Lin
- Department of Materials Science and Engineering, National Cheng Kung University Tainan City 70101 Taiwan
| | - Yi Qin
- Department of Materials Science and Engineering, National Cheng Kung University Tainan City 70101 Taiwan
| | - Xiaoding Qi
- Department of Materials Science and Engineering, National Cheng Kung University Tainan City 70101 Taiwan
- Centre for Micro/Nano Science and Technology, National Cheng Kung University Tainan City 70101 Taiwan
| | - Liji Huang
- Siargo Ltd. Santa Clara California 95054 USA
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Parayil RT, Bhagat B, Gupta SK, Mukherjee K, Mohapatra M. Oxygen vacancy-enriched Zn 2SnO 4 for aliphatic alcohol sensing and enhanced selectivity towards n-butanol. Phys Chem Chem Phys 2024; 26:7424-7434. [PMID: 38351884 DOI: 10.1039/d3cp05178a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The sensitive detection of toxic flammable volatile organics using low cost efficient sensors is important for ensuring both indoor and outdoor safety. It is essential for chemical sensors to exhibit a significantly stronger response to target analytes compared to equivalent amounts of analogous competing chemicals. In line with this importance, current work evaluated the performance of Zn2SnO4, a n-type semiconducting metal oxide, for sensing n-butanol in comparison to methanol, ethanol, and propanol vapours. These vapours fall within the category of aliphatic alcohols but vary in characteristics such as molecular weight, vapour pressure, volatility, and diffusivity. In this work we have explored the sensor's performance by adjusting the operating temperature over the range of 225-300 °C while detecting 1000 ppm of each of these vapours. Efforts were made to establish a correlation between the sensor's responses with the interactions of these vapours on the sensor's surface. Prior to assessing the sensing characteristics of the solid-state-route-derived Zn2SnO4, its structural characteristics, including phase purity, crystalline structure, bonding patterns, morphology, and defect characteristics, were studied. This comprehensive analysis sheds light on the potential of Zn2SnO4 as an effective sensor for detecting n-butanol.
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Affiliation(s)
- Reshmi Thekke Parayil
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
- Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
| | - B Bhagat
- Department of Chemistry, Pandit Deendayal Energy University, Gandhinagar-382426, Gujarat, India.
| | - Santosh K Gupta
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
- Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
| | - K Mukherjee
- Department of Chemistry, Pandit Deendayal Energy University, Gandhinagar-382426, Gujarat, India.
| | - Manoj Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
- Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
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4
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Kumari P, Poornesh P, Chattopadhyay S, Rao A, Kulkarni SD. Evaluation of Zn: WO 3 Thin Films as a Sensing Layer for Detection of NH 3 Gas. MICROMACHINES 2023; 14:732. [PMID: 37420965 DOI: 10.3390/mi14040732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 03/13/2023] [Accepted: 03/24/2023] [Indexed: 07/09/2023]
Abstract
Pristine WO3 and Zn-doped WO3 were synthesized using the spray pyrolysis technique to detect ammonia gas. The prominent orientation of the crystallites along the (200) plane was evident from X-ray diffraction (XRD) studies. Scanning Electron Microscope (SEM) morphology indicated well-defined grains upon Zn doping with a smaller grain size of 62 nm for Zn-doped WO3 (Zn: WO3) film. The photoluminescence (PL) emission at different wavelengths was assigned to defects such as oxygen vacancies, interstitial oxygens, localized defects, etc. X-ray Photoelectron spectroscopy (XPS) studies confirmed the formation of oxygen vacancies in the deposited films. The ammonia (NH3) sensing analysis of the deposited films was carried out at an optimum working temperature of 250 °C. The sensor performance of Zn: WO3 was enhanced compared to pristine WO3 at 1 ppm NH3 concentration, elucidating the possibility of the films in sensing applications.
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Affiliation(s)
- Priyanka Kumari
- Department of Chemistry, School of Basic Sciences, Manipal University Jaipur, Jaipur 303007, India
| | - P Poornesh
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India
| | - Saikat Chattopadhyay
- Department of Physics, School of Basic Sciences, Manipal University Jaipur, Jaipur 303007, India
| | - Ashok Rao
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India
| | - Suresh D Kulkarni
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576104, India
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Liu S, Zeng T, Zhang Y, Wan Q, Yang N. Coupling W 18 O 49 /Ti 3 C 2 T x MXene Pseudocapacitive Electrodes with Redox Electrolytes to Construct High-Performance Asymmetric Supercapacitors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204829. [PMID: 36344426 DOI: 10.1002/smll.202204829] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 10/27/2022] [Indexed: 06/16/2023]
Abstract
A pseudocapacitive electrode with a large surface area is critical for the construction of a high-performance supercapacitor. A 3D and interconnected network composed of W18 O49 nanoflowers and Ti3 C2 Tx MXene nanosheets is thus synthesized using an electrostatic attraction strategy. This composite effectively prevents the restacking of Ti3 C2 Tx MXene nanosheets and meanwhile sufficiently exposes electrochemically active sites of W18 O49 nanoflowers. Namely, this self-assembled composite owns abundant oxygen vacancies from W18 O49 nanoflowers and enough active sites from Ti3 C2 Tx MXene nanosheets. As a pseudocapacitive electrode, it shows a big specific capacitance, superior rate capability and good cycle stability. A quasi-solid-state asymmetric supercapacitor (ASC) is then fabricated using this pseudocapacitive anode and the cathode of activated carbon coupled with a redox electrolyte of FeBr3 . This ASC displays a cell voltage of 1.8 V, a capacitance of 101 F g-1 at a current density of 1 A g-1 , a maximum energy density of 45.4 Wh kg-1 at a power density of 900 W kg-1 , and a maximum power density of 18 000 W kg-1 at an energy density of 10.8 Wh kg-1 . The proposed strategies are promising to synthesize different pseudocapacitive electrodes as well as to fabricate high-performance supercapacitor devices.
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Affiliation(s)
- Shuang Liu
- School of Chemistry and Environmental Engineering, Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Lab of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan, 430073, China
| | - Ting Zeng
- School of Chemistry and Environmental Engineering, Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Lab of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan, 430073, China
| | - Yuanyuan Zhang
- School of Chemistry and Environmental Engineering, Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Lab of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan, 430073, China
| | - Qijin Wan
- School of Chemistry and Environmental Engineering, Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Lab of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan, 430073, China
| | - Nianjun Yang
- Institute of Materials Engineering, University of Siegen, 57076, Siegen, Germany
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6
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Wang B, Zhong X, Xu H, Zhang Y, Cvelbar U, Ostrikov K(K. Structure and Photoluminescence of WO 3-x Aggregates Tuned by Surfactants. MICROMACHINES 2022; 13:2075. [PMID: 36557374 PMCID: PMC9785493 DOI: 10.3390/mi13122075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/18/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
The optoelectronic properties of transition metal oxide semiconductors depend on their oxygen vacancies, nanostructures and aggregation states. Here, we report the synthesis and photoluminescence (PL) properties of substoichiometric tungsten oxide (WO3-x) aggregates with the nanorods, nanoflakes, submicro-spherical-like, submicro-spherical and micro-spherical structures in the acetic acid solution without and with the special surfactants (butyric or oleic acids). Based on theory on the osmotic potential of polymers, we demonstrate the structural change of the WO3-x aggregates, which is related to the change of steric repulsion caused by the surfactant layers, adsorption and deformation of the surfactant molecules on the WO3-x nanocrystals. The WO3-x aggregates generate multi-color light, including ultraviolet, blue, green, red and near-infrared light caused by the inter-band transition and defect level-specific transition as well as the relaxation of polarons. Compared to the nanorod and nanoflake WO3-x aggregates, the PL quenching of the submicro-spherical-like, submicro-spherical and micro-spherical WO3-x aggregates is associated with the coupling between the WO3-x nanoparticles and the trapping centers arising from the surfactant molecules adsorbed on the WO3-x nanoparticles.
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Affiliation(s)
- Biben Wang
- College of Chemistry and Chemical Engineering, Chongqing University of Technology, 69 Hongguang Rd, Lijiatuo, Banan District, Chongqing 400054, China
| | - Xiaoxia Zhong
- State Key Laboratory of Advanced Optical Communication and Networks, Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Haiyan Xu
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China
| | - Yongcai Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, China
| | - Uros Cvelbar
- Jozef Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
| | - Kostya (Ken) Ostrikov
- School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD 4000, Australia
- Centre for Materials Science, Queensland University of Technology, Brisbane, QLD 4000, Australia
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7
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Zhou D, Chen YX, Yuan XY, Chai ZL, Liu JK. Gradient Design of Vacancies and Their Positive Correlation with Electrochemical Anticorrosion Protection. Inorg Chem 2022; 61:8053-8065. [PMID: 35546124 DOI: 10.1021/acs.inorgchem.2c00903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The contribution of defects to electrochemistry is a controversial but practically applicable subject. Meanwhile, it is challenging to obtain precisely a certain nonchemometric single phase in mixed-valence compounds. The precise design of nonchemometric single-phase WO3-x (x = 0, 0.1, 0.28, and 1) mixed-valence metal oxides (MVMOs) was achieved by the gradient intrinsic reduction method, and the correlation between oxygen vacancies and electrochemical anticorrosion protection was explored systematically. Then, the decisive role of periodic oxygen vacancies in electrochemical anticorrosion was confirmed. And the origin was the synergistic reaction of oxygen vacancy-upgraded photocathodic protection, vacancy-induced passivation, and mixed-valence reductive protection, which were brought about by the high oxygen vacancy concentration. Integrating the above three aspects, the WO2.72 MVMO showed the best electrochemical anticorrosion performance by increasing the resistance value to 7.67 times that of the epoxy resin coating. The establishment of a positive correlation between oxygen vacancy and corrosion protection in WO3-x (x = 0, 0.1, 0.28, and 1) materials can not only guide the design of MVMOs but also make an important contribution to the rapid precorrosion performance of the materials.
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Affiliation(s)
- Dan Zhou
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yi-Xiang Chen
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Xiao-Yu Yuan
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.,Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, Sichuan, P. R. China
| | - Zhuang-Lei Chai
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Jin-Ku Liu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.,Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, Sichuan, P. R. China
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8
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Chen PH, Huang CC, Wu CC, Chen PH, Tripathi A, Wang YL. Saliva-based COVID-19 detection: A rapid antigen test of SARS-CoV-2 nucleocapsid protein using an electrical-double-layer gated field-effect transistor-based biosensing system. SENSORS AND ACTUATORS. B, CHEMICAL 2022; 357:131415. [PMID: 35043033 DOI: 10.1016/j.snb.2022.131412] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 01/08/2022] [Accepted: 01/10/2022] [Indexed: 05/27/2023]
Abstract
Facing the unstopped surges of COVID-19, an insufficient capacity of diagnostic testing jeopardizes the control of disease spread. Due to a centralized setting and a long turnaround, real-time reverse transcription polymerase chain reaction (real-time RT-PCR), the gold standard of viral detection, has fallen short in timely reflecting the epidemic status quo during an urgent outbreak. As such, a rapid screening tool is necessitated to help contain the spread of COVID-19 amid the countries where the vaccine implementations have not been widely deployed. In this work, we propose a saliva-based COVID-19 antigen test using the electrical double layer (EDL)-gated field-effect transistor-based biosensor (BioFET). The detection of SARS-CoV-2 nucleocapsid (N) protein is validated with limits of detection (LoDs) of 0.34 ng/mL (7.44 pM) and 0.14 ng/mL (2.96 pM) in 1× PBS and artificial saliva, respectively. The specificity is inspected with types of antigens, exhibiting low cross-reactivity among MERS-CoV, Influenza A virus, and Influenza B virus. This portable system is embedded with Bluetooth communication and user-friendly interfaces that are fully compatible with digital health, feasibly leading to an on-site turnaround, an effective management, and a proactive response taken by medical providers and frontline health workers.
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Affiliation(s)
- Pin-Hsuan Chen
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan (R.O.C.)
| | - Chih-Cheng Huang
- Institute of Nanoengineering and Microsystems, National Tsing Hua University, Hsinchu 300044, Taiwan (R.O.C.)
| | - Chia-Che Wu
- Institute of Nanoengineering and Microsystems, National Tsing Hua University, Hsinchu 300044, Taiwan (R.O.C.)
| | - Po-Hsuan Chen
- Institute of Nanoengineering and Microsystems, National Tsing Hua University, Hsinchu 300044, Taiwan (R.O.C.)
| | - Adarsh Tripathi
- Institute of Molecular Medicine, National Tsing Hua University, Hsinchu 300044, Taiwan (R.O.C.)
| | - Yu-Lin Wang
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan (R.O.C.)
- Institute of Nanoengineering and Microsystems, National Tsing Hua University, Hsinchu 300044, Taiwan (R.O.C.)
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9
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Anusha, Ani A, Poornesh P, Antony A, Bhaghyesh, Shchetinin IV, Nagaraja KK, Chattopadhyay S, Vinayakumar KB. Impact of Ag on the Limit of Detection towards NH 3-Sensing in Spray-Coated WO 3 Thin-Films. SENSORS (BASEL, SWITZERLAND) 2022; 22:2033. [PMID: 35271180 PMCID: PMC8915039 DOI: 10.3390/s22052033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/16/2022] [Accepted: 02/22/2022] [Indexed: 02/05/2023]
Abstract
Ag-doped WO3 (Ag-WO3) films were deposited on a soda-lime glass substrate via a facile spray pyrolysis technique. The surface roughness of the films varied between 0.6 nm and 4.3 nm, as verified by the Atomic Force Microscopy (AFM) studies. Ammonia (NH3)-sensing measurements of the films were performed for various concentrations at an optimum sensor working temperature of 200 °C. Enrichment of oxygen vacancies confirmed by X-ray Photoelectron Spectroscopy (XPS) in 1% Ag-WO3 enhanced the sensor response from 1.06 to 3.29, approximately 3 times higher than that of undoped WO3. Limit of detection (LOD) up to 500 ppb is achieved for 1% Ag-WO3, substantiating the role of Ag in improving sensor performance.
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Affiliation(s)
- Anusha
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; (A.); (A.A.); (B.); (K.K.N.)
| | - Aninamol Ani
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; (A.); (A.A.); (B.); (K.K.N.)
| | - P. Poornesh
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; (A.); (A.A.); (B.); (K.K.N.)
| | - Albin Antony
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách, Praha 8, 218000 Praha, Czech Republic;
| | - Bhaghyesh
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; (A.); (A.A.); (B.); (K.K.N.)
| | - Igor V. Shchetinin
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, Leninskiy Pr. 4, 119049 Moscow, Russia;
| | - K. K. Nagaraja
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; (A.); (A.A.); (B.); (K.K.N.)
| | - Saikat Chattopadhyay
- Department of Physics, School of Basic Sciences, Manipal University Jaipur, Jaipur 303007, Rajasthan, India;
| | - K. B. Vinayakumar
- Micro and Nano Fabrication Department, INL-International Iberian Nanotechnology Laboratory Avenida Mestre Jose Veiga, 4715-330 Braga, Portugal;
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Novak TG, Kim J, DeSario PA, Jeon S. Synthesis and applications of WO 3 nanosheets: the importance of phase, stoichiometry, and aspect ratio. NANOSCALE ADVANCES 2021; 3:5166-5182. [PMID: 36132624 PMCID: PMC9419828 DOI: 10.1039/d1na00384d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 08/05/2021] [Indexed: 06/15/2023]
Abstract
Tungsten trioxide (WO3) is an abundant, versatile oxide that is widely explored for catalysis, sensing, electrochromic devices, and numerous other applications. The exploitation of WO3 in nanosheet form provides potential advantages in many of these fields because the 2D structures have high surface area and preferentially exposed facets. Relative to bulk WO3, nanosheets expose more active sites for surface-sensitive sensing/catalytic reactions, and improve reaction kinetics in cases where ionic diffusion is a limiting factor (e.g. electrochromic or charge storage). Synthesis of high aspect ratio WO3 nanosheets, however, is more challenging than other 2D materials because bulk WO3 is not an intrinsically layered material, making the widely-studied sonication-based exfoliation methods used for other 2D materials not well-suited to WO3. WO3 is also highly complex in terms of how the synthesis method affects the properties of the final material. Depending on the route used and subsequent post-synthesis treatments, a wide variety of different morphologies, phases, exposed facets, and defect structures are created, all of which must be carefully considered for the chosen application. In this review, the recent developments in WO3 nanosheet synthesis and their impact on performance in various applications are summarized and critically analyzed.
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Affiliation(s)
- Travis G Novak
- NRC Postdoctoral Associate, US Naval Research Laboratory Washington D.C. 20375 USA
| | - Jin Kim
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea
| | - Paul A DeSario
- Chemistry Division (Code 6100), U.S. Naval Research Laboratory Washington D.C. 20375 USA
| | - Seokwoo Jeon
- Department of Materials Science and Engineering, KAIST Institute for the Nanocentury, Advanced Battery Center, KAIST Daejeon 34141 Republic of Korea
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11
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Americo S, Pargoletti E, Soave R, Cargnoni F, Trioni MI, Chiarello GL, Cerrato G, Cappelletti G. Unveiling the acetone sensing mechanism by WO3 chemiresistors through a joint theory-experiment approach. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137611] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Barik R, Yadav AK, Jha SN, Bhattacharyya D, Ingole PP. Two-Dimensional Tungsten Oxide/Selenium Nanocomposite Fabricated for Flexible Supercapacitors with Higher Operational Voltage and Their Charge Storage Mechanism. ACS APPLIED MATERIALS & INTERFACES 2021; 13:8102-8119. [PMID: 33591180 DOI: 10.1021/acsami.0c15818] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The present work elaborates the high-energy-density, stable, and flexible supercapacitor devices (full-cell configuration with asymmetric setup) based on a two-dimensional tungsten oxide/selenium (2D WO3/Se) nanocomposite. For this, the 2D WO3/Se nanocomposite synthesized by a hydrothermal method followed by air annealing was coated on a flexible carbon cloth current collector and combined separately with both 0.1 M H2SO4 and 1-butyl-3-methyl imidazolium tetrafluoroborate room temperature ionic liquid (BmimBF4 RTIL) as electrolyte. Different physicochemical characterization techniques, viz., transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, are utilized for phase confirmation and morphology identification of the obtained samples. The electrochemical analysis was used to evaluate charge storage mechanism. The half-cell configuration (three electrode system) in 0.1 M H2SO4 shows a specific capacitance of 564 F g-1 at 6 A g-1 current density, whereas with ionic liquid as electrolyte, a higher specific capacitance of 1650 F g-1 was obtained at a higher current of 40 mA and working potential of 4 V. Importantly, the asymmetric flexible supercapacitor device with PVA-H2SO4 electrolyte shows a working voltage of 1.7 V. A specific capacitance of 858 mF g-1 is obtained for the asymmetric electrode system with an energy density of 47 mWh kg-1 and a power density of 345 mW kg-1 at a current density of 0.2 A g-1.
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Affiliation(s)
- Rasmita Barik
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ashok Kumar Yadav
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400094, India
| | - Shambhu Nath Jha
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400094, India
| | - Dibyendu Bhattacharyya
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400094, India
| | - Pravin P Ingole
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
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Kumar N, Haviar S, Rezek J, Baroch P, Zeman P. Tuning Stoichiometry and Structure of Pd-WO 3-x Thin Films for Hydrogen Gas Sensing by High-Power Impulse Magnetron Sputtering. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E5101. [PMID: 33198193 PMCID: PMC7697909 DOI: 10.3390/ma13225101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 11/02/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
By tuning the deposition parameters of reactive high-power impulse magnetron sputtering, specifically the pulse length, we were able to prepare WO3-x films with various stoichiometry and structure. Subsequently, the films were annealed in air at moderate temperature (350 °C). We demonstrate that the stoichiometry of the as-deposited films influences considerably the type of crystalline phase formed in the annealed films. The appropriate sub-stoichiometry of the films (approx. WO2.76) enabled crystallization of the monoclinic phase during the annealing. This phase is favorable for hydrogen sensing applications. To characterize the sensory behavior of the films, the tungsten oxide films were decorated by Pd nanoparticles before annealing and were assembled as a conductometric gas sensor. The sensory response of the films that crystallized in the monoclinic structure was proven to be superior to that of the films containing other phases.
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Affiliation(s)
| | - Stanislav Haviar
- Department of Physics and NTIS—European Centre of Excellence, Faculty of Applied Sciences, University of West Bohemia, Univerzitní 8, 306 14 Plzeň, Czech Republic; (N.K.); (J.R.); (P.B.); (P.Z.)
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14
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Cheng X, Jiang X, Tao K, Su Q, Wang Y, Xie E. Microscopic Nature of Gas Adsorption on WO 3 Surfaces: Electron Interaction and Localization. J Phys Chem Lett 2020; 11:9070-9078. [PMID: 33047959 DOI: 10.1021/acs.jpclett.0c02020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Even though WO3 has been used in gas-sensors for many years, little is known about the gas-sensing mechanism. Using first-principles density functional theory and experimental methods, we study the adsorption of CO, H2, NH3, and NO2 on the surface of WO3 (001). The results indicate that the surface undergoes reconstruction after gas adsorption, which inevitably causes the localization of surface electrons and a change of the electric (sensing) signal. Through the analysis of atomic orbital and molecular orbital, the adsorption mechanism can be effectively predicted. The above analysis confirms that the resistance change is only related to the electronic behavior of the surface and the gas. We corrected problems associated with adsorption energy to characterize the adsorption strength of a gas on a surface, and we investigated the effect of the test temperature and test environment on both electronic interaction and the final electric sensing signal.
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Affiliation(s)
- Xu Cheng
- School of Physical Science and Technology, Lanzhou University, 730000 Lanzhou, China
| | - Xiao Jiang
- School of Physical Science and Technology, Lanzhou University, 730000 Lanzhou, China
| | - Kun Tao
- Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, 730000 Lanzhou, China
| | - Qing Su
- School of Physical Science and Technology, Lanzhou University, 730000 Lanzhou, China
| | - Yanrong Wang
- School of Physical Science and Technology, Lanzhou University, 730000 Lanzhou, China
| | - Erqing Xie
- School of Physical Science and Technology, Lanzhou University, 730000 Lanzhou, China
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15
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Adjustment of oxygen vacancy states in ZnO and its application in ppb-level NO 2 gas sensor. Sci Bull (Beijing) 2020; 65:1650-1658. [PMID: 36659041 DOI: 10.1016/j.scib.2020.05.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/06/2020] [Accepted: 05/20/2020] [Indexed: 01/21/2023]
Abstract
Oxygen vacancy (VO) is long believed as a key factor influencing the gas sensing properties. However, the concentration of VO is generally focused while the VO state is neglected, which masks the inherent mechanism of gas sensor. Using a post annealing process, the influence of VO states on the response of ZnO nanofilm to NO2 gas is investigated in this study. The systematical analysis of the results obtained by different methods indicates a transformation of VO from the neutral to the doubly ionized state during post annealing treatment. The results also imply that the gas sensing properties is not directly correlated with the VO concentration. And due to the competitive adsorption of ambient O2, the neutral VO is majorly occupied by the adsorbed O2 while the VO in doubly ionized state can promote the adsorption of NO2. Consequently, the transition of VO from the neutral to the doubly ionized state can lead to a dramatic increase of the response to NO2, from 733 to 3.34 × 104 for 100 ppm NO2. Guided by this mechanism, NO2 gas sensing in ppb-level is also achieved: the response reaches 165% to 25 ppb (0.025 ppm) NO2 with a good repeatability.
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Peng F, Yu W, Lu Y, Sun Y, Fu X, Hao JM, Chen X, Cong R, Dai N. Enhancement of Low-Temperature Gas-Sensing Performance Using Substoichiometric WO 3-x Modified with CuO. ACS APPLIED MATERIALS & INTERFACES 2020; 12:41230-41238. [PMID: 32804471 DOI: 10.1021/acsami.0c09213] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
To verify the effect of oxygen vacancy on gas sensitivity, we have systematically investigated the gas-sensing performance of copper oxide/substoichiometric tungsten oxide (CuO/WO3-x) nanocomposite sensors. Oxygen deficiency in WO3-x facilitates the reaction of hydrogen sulfide (H2S) gas with chemisorbed oxygen species (i.e., O2-, O-, and O2-) at low temperature. The oxygen/sulphur exchange reaction between CuO and H2S in the sensing process can achieve room temperature operation of gas sensors. After the WO3-x nanorods were modified by a low content of CuO nanoparticles (Cu:W = 1:20), the sensors present an n-type sensing behavior. Their best working temperatures drop from 289 °C (or 386 °C) to 99 °C (or 70 °C) at which the responses are improved by 14 to 163 times for different x values. Among them, CuO(L)/W5O14 shows the highest sensitivity of 1575.7 to 10 ppm H2S at 99 °C and 171.5 to 10 ppm H2S at room temperature. Once WO3-x were loaded with a high concentration of CuO nanoparticles (Cu:W = 1:2), they exhibit a p-type behavior, and the optimal working temperatures reduce suddenly to room temperature at which CuO(H)/W18O49 displays the most sensitive response of 7.2 even toward trace amounts of H2S as low as 100 ppb. In addition, p-type CuO weakens the metal-like characteristics of W18O49 and such weakening effect enhances with an increase in the CuO content. Therefore, the sensing performance of the CuO/W18O49 composite is the best among the four CuO/WO3-x sensors. The two designs for low and high Cu/W molar ratios all achieve enhanced room-temperature H2S gas response, with a fast recovery time of ∼60 s under heating pulse, as well as an excellent selectivity, which makes the sensors a promising candidate for practical applications. Moreover, the micro-Raman spectra confirmed CuS formation and the thermal effect on the decomposition of CuS in the sensing process was studied.
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Affiliation(s)
- Fang Peng
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
- School of Electronic Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weiwei Yu
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
- School of Electronic Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yue Lu
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
| | - Yan Sun
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
| | - Xiuli Fu
- School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Jia Ming Hao
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
| | - Xin Chen
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
| | - Rui Cong
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
| | - Ning Dai
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
- Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
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17
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Zhai C, Zhang H, Du L, Wang D, Xing D, Zhang M. Nickel/iron-based bimetallic MOF-derived nickel ferrite materials for triethylamine sensing. CrystEngComm 2020. [DOI: 10.1039/c9ce01807g] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The sensors based on the different sized MOF derived NiFe2O4 polyhedrons exhibit fast TEA response speed and distinguishing sensitivity.
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Affiliation(s)
- Chengbo Zhai
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Hongpeng Zhang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Liyong Du
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Dongxue Wang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Dejun Xing
- Department of Medical Oncology
- Jilin Cancer Hospital
- Changchun
- People's Republic of China
| | - Mingzhe Zhang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- People's Republic of China
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Jayababu N, Poloju M, Shruthi J, Reddy MVR. Ultrasensitive resistivity-based ethanol sensor based on the use of CeO 2-Fe 2O 3 core-shell microclusters. Mikrochim Acta 2019; 186:712. [PMID: 31650364 DOI: 10.1007/s00604-019-3809-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 09/09/2019] [Indexed: 11/26/2022]
Abstract
This paper presents a method for synthesis of CeO2-Fe2O3 core-shell nanoparticles (CSNPs). These are shown to display enhanced ethanol sensing properties. Synthesis was done via a two-step process, starting with co-precipitation and followed by applying a sol-gel method. High resolution electron microscopy results revealed the core-shell nature of the particles. Surface morphological studies of the CSNPs showed a microcluster-like structure which is assumed to be responsible for the enhanced sensing response. X-ray photoelectron spectroscopy revealed valence states of Fe(III) and Ce(IV). The material was used in a resisitive sensor for ethanol vapor at room temperature (RT), at a typically applied voltage of 5 V. The response of the sensor is higher than that of pristine CeO2 or Fe2O3 sensors towards 100 ppm of ethanol at RT. The lower detection limit is 1 ppm (with a signal change of 23). The response and recovery times are as short as 3 and 7 s, respectively. The sensing mechanism is discussed in detail with respect to n-n heterojunctions formed between n-CeO2 and n-Fe2O3, high catalytic activity of the Fe2O3, and microcluster-like structures of the particles. Graphical abstract Schematic representation of gas sensing mechanism of CeO2-Fe2O3 core-shell nanoparticles (c) along with their morphological images (a&b).
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Affiliation(s)
- Nagabandi Jayababu
- Thin Films and Nano Materials Research Laboratory, Department of Physics, Osmania University, Hyderabad, Telangana State, 500007, India.
| | - Madhukar Poloju
- Thin Films and Nano Materials Research Laboratory, Department of Physics, Osmania University, Hyderabad, Telangana State, 500007, India
| | - Julakanti Shruthi
- Thin Films and Nano Materials Research Laboratory, Department of Physics, Osmania University, Hyderabad, Telangana State, 500007, India
| | - Musugu Venkata Ramana Reddy
- Thin Films and Nano Materials Research Laboratory, Department of Physics, Osmania University, Hyderabad, Telangana State, 500007, India
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