1
|
Lin JW, Wang YX, Xu H, Huo LZ, Yang XJ, Luo XP. Preparation of Pt and bamboo charcoal co-modified TiO 2 for formaldehyde sensing at room temperature. ROYAL SOCIETY OPEN SCIENCE 2024; 11:231216. [PMID: 39076366 PMCID: PMC11285426 DOI: 10.1098/rsos.231216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 04/11/2024] [Accepted: 05/14/2024] [Indexed: 07/31/2024]
Abstract
Anatase TiO2 has evolved into one of the most attractive materials for gas sensing owing to its strong oxidation activity and excellent sensing properties. In this study, we prepared Pt and bamboo charcoal co-modified nano-TiO2 using a one-pot hydrothermal process and applied it to detect formaldehyde. The successful incorporation of the precious metal Pt and bamboo charcoal onto TiO2 was confirmed by scanning electron microscope, transmission electron microscopy, energy dispersive spectrometer, X-ray diffraction and X-ray photoelectron spectroscopy. Detailed analysis revealed a homogeneous distribution of Pt nanoparticles and bamboo charcoal on the TiO2 surface, which significantly improved the surface area and facilitated gas adsorption. These modifiers significantly enhanced the response of TiO2 to formaldehyde, for instance, the response signal increased fourfold, while the response time decreased from 91 to 68 s. The sample with 0.5@Pt and 0.5@C bamboo charcoal performed the best, showcasing the synergistic effect of metal nanoparticles and carbonaceous materials on gas-sensing properties. Our work highlighted the potential of using biomass-derived carbon to enhance the detection of formaldehyde and demonstrated the importance of material characteristics in designing effective gas sensors.
Collapse
Affiliation(s)
- Jian-Wei Lin
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou311300, People’s Republic of China
| | - Yu-Xuan Wang
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou311300, People’s Republic of China
| | - Hao Xu
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou311300, People’s Republic of China
| | - Li-Zhu Huo
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou311300, People’s Republic of China
| | - Xue-Juan Yang
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou311300, People’s Republic of China
| | - Xi-Ping Luo
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou311300, People’s Republic of China
| |
Collapse
|
2
|
Liu X, Han J, Qiao X, Cai H, Zhao Y, Zhang Z, Zhai B, Ni T, Zhao C, Zhu Y. Bimetallic Au and Pd Nanoparticles Modified WO 3 Nanosheets for Enhancing the Sensitivity and Selectivity of Formaldehyde Assessment in Aquatic Products. ACS APPLIED MATERIALS & INTERFACES 2024; 16:22155-22165. [PMID: 38634550 DOI: 10.1021/acsami.4c02211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Formaldehyde, a common illegal additive in aquatic products, poses a threat to people's health and lives. In this study, a novel metal oxide semiconductor gas sensor based on AuPd-modified WO3 nanosheets (NSs) had been developed for the highly efficient detection of formaldehyde. WO3 NS modified with 2.0% AuPd nanoparticles showed a higher response (Ra/Rg = 94.2) to 50 ppm of formaldehyde at 210 °C, which was 36 times more than the pristine WO3 NS. In addition, the AuPd/WO3 gas sensor had a relatively short response/recovery time of 10 s/9 s for 50 ppm of formaldehyde at 210 °C, with good immunity to other interfering gases and good stability for formaldehyde. The excellent gas-sensitive performance was attributed to the chemical sensitization of Au, the electronic sensitization of Pd, and the synergistic effect of bimetallic AuPd, which facilitated the recognition and response of formaldehyde molecules. Additionally, the high sensitivity and broad application prospect of the 2.0% AuPd/WO3 NS composite-based sensor in real sample detection were also confirmed by using the above sensor for the detection of formaldehyde in aquatic products such as squid and shrimp.
Collapse
Affiliation(s)
- Xun Liu
- College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), International Research Center for Food and Health, Shanghai Ocean University, Shanghai 201306, China
| | - Jingting Han
- College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), International Research Center for Food and Health, Shanghai Ocean University, Shanghai 201306, China
| | - Xiaopeng Qiao
- College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), International Research Center for Food and Health, Shanghai Ocean University, Shanghai 201306, China
| | - Haijie Cai
- College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), International Research Center for Food and Health, Shanghai Ocean University, Shanghai 201306, China
- School of Basic Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Yong Zhao
- College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), International Research Center for Food and Health, Shanghai Ocean University, Shanghai 201306, China
| | - Zhaohuan Zhang
- College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), International Research Center for Food and Health, Shanghai Ocean University, Shanghai 201306, China
| | - Baiqiang Zhai
- Henan Railway Food Safety Management Engineering Technology Research Center, Zhengzhou Railway Vocational & Technical College, Zhengzhou 451460, China
| | - Tianjun Ni
- School of Basic Medicine, Xinxiang Medical University, Xinxiang 453003, China
| | - Cheng Zhao
- College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), International Research Center for Food and Health, Shanghai Ocean University, Shanghai 201306, China
- Henan Railway Food Safety Management Engineering Technology Research Center, Zhengzhou Railway Vocational & Technical College, Zhengzhou 451460, China
| | - Yongheng Zhu
- College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), International Research Center for Food and Health, Shanghai Ocean University, Shanghai 201306, China
| |
Collapse
|
3
|
Mahata B, Acharyya S, Banerji P, Guha PK. Assessment of fish adulteration using SnO 2 nanopetal-based gas sensor and machine learning. Food Chem 2024; 438:138039. [PMID: 38011794 DOI: 10.1016/j.foodchem.2023.138039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 11/02/2023] [Accepted: 11/16/2023] [Indexed: 11/29/2023]
Abstract
The work presents the identification of fish adulteration and quality assessment by incorporating a chemiresistive gas sensor and machine learning (ML) techniques. Highly sensitive SnO2 nanopetals were synthesized chemically and integrated with interdigitated electrodes to fabricate a sensor device. The sensor was calibrated with formaldehyde (37 %) with a theoretical detection limit of 75 ppb and further utilized to detect the vapors emitted from fresh and formalin-adulterated fish. An extensive sensing investigation was conducted with freshly caught Rohu fish samples. The sensing behavior was examined for all the samples at different time intervals to estimate the spoilage level. The classification between fresh and adulterated fish samples was obtained with 100 % accuracy by employing ML tools. Moreover, the storage duration and spoilage level of fish samples were quantified using regression models. This work emphasizes the potential of nanomaterials combined with machine learning for the accurate detection of adulteration in food systems.
Collapse
Affiliation(s)
- Bidesh Mahata
- School of Nano Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Snehanjan Acharyya
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Pallab Banerji
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Prasanta Kumar Guha
- Electronics & Electrical Communication Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| |
Collapse
|
4
|
T RB, Yadav PVK, Mondal A, Ramakrishnan K, Jarugala J, Liu C, Reddy YAK. Enhanced response of WO 3 thin film through Ag loading towards room temperature hydrogen gas sensor. CHEMOSPHERE 2024; 353:141545. [PMID: 38430945 DOI: 10.1016/j.chemosphere.2024.141545] [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: 09/05/2023] [Revised: 01/25/2024] [Accepted: 02/23/2024] [Indexed: 03/05/2024]
Abstract
This study investigates the enhancement of hydrogen gas-sensing performance by introducing silver (Ag) nanoparticles onto tungsten trioxide (WO3) thin films. Herein, the WO3 thin films are deposited onto SiO2/Si substrates using a sputtering technique and Ag nanoparticles are loaded onto the WO3 surface through a spin coating technique. To evaluate the sensing performance of a hydrogen gas, interdigitated titanium (Ti) electrodes are deposited onto the Ag:WO3 layer. Structural, chemical, and morphological analyses are conducted for both pristine WO3 and Ag:WO3 thin films, followed by the investigation of gas-sensing performance by varying hydrogen gas concentrations from 100 ppm to 300 ppm and operating temperatures between 30 °C and 300 °C. The obtained results demonstrate that Ag:WO3 thin films exhibit a notably enhanced response of 5.08% when exposed to a concentration of 100 ppm of hydrogen gas at room temperature, compared to the pristine WO3 of 3.40%. The fabricated Ag:WO3 sensor exhibits a response time of 3.0 s, a recovery time of 4.5 s, and also demonstrates excellent stability over 45 days period. Finally, with the superior sensitivity and fast response time, the fabricated Ti/Ag:WO3/Ti hydrogen gas sensor test-device can be a potential for improvement of safety from both industrial and environmental perspectives.
Collapse
Affiliation(s)
- Ramya Barathy T
- Department of Physics, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram, Off Vandalur-Kelambakkam Road, Chennai, 600127, India
| | - P V Karthik Yadav
- Department of Physics, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram, Off Vandalur-Kelambakkam Road, Chennai, 600127, India
| | - Anibrata Mondal
- Department of Physics, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram, Off Vandalur-Kelambakkam Road, Chennai, 600127, India
| | - Karthickraja Ramakrishnan
- Division of Physics, School of Advanced Sciences, Vellore Institute of Technology (VIT), Vandalur-Kelambakkam Road, Chennai, 600127, India
| | - Jayaramudu Jarugala
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Uppal Road, Tarnaka, Hyderabad 500007, India
| | - Chunli Liu
- Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, Yongin, 17035, Republic of Korea
| | - Y Ashok Kumar Reddy
- Department of Physics, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram, Off Vandalur-Kelambakkam Road, Chennai, 600127, India.
| |
Collapse
|
5
|
Zhao H, Wang Y, Zhou Y. Accelerating the Gas-Solid Interactions for Conductometric Gas Sensors: Impacting Factors and Improvement Strategies. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3249. [PMID: 37110096 PMCID: PMC10146907 DOI: 10.3390/ma16083249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 06/19/2023]
Abstract
Metal oxide-based conductometric gas sensors (CGS) have showcased a vast application potential in the fields of environmental protection and medical diagnosis due to their unique advantages of high cost-effectiveness, expedient miniaturization, and noninvasive and convenient operation. Of multiple parameters to assess the sensor performance, the reaction speeds, including response and recovery times during the gas-solid interactions, are directly correlated to a timely recognition of the target molecule prior to scheduling the relevant processing solutions and an instant restoration aimed for subsequent repeated exposure tests. In this review, we first take metal oxide semiconductors (MOSs) as the case study and conclude the impact of the semiconducting type as well as the grain size and morphology of MOSs on the reaction speeds of related gas sensors. Second, various improvement strategies, primarily including external stimulus (heat and photons), morphological and structural regulation, element doping, and composite engineering, are successively introduced in detail. Finally, challenges and perspectives are proposed so as to provide the design references for future high-performance CGS featuring swift detection and regeneration.
Collapse
|
6
|
Zhu LY, Ou LX, Mao LW, Wu XY, Liu YP, Lu HL. Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview. NANO-MICRO LETTERS 2023; 15:89. [PMID: 37029296 PMCID: PMC10082150 DOI: 10.1007/s40820-023-01047-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 02/25/2023] [Indexed: 06/19/2023]
Abstract
Highly sensitive gas sensors with remarkably low detection limits are attractive for diverse practical application fields including real-time environmental monitoring, exhaled breath diagnosis, and food freshness analysis. Among various chemiresistive sensing materials, noble metal-decorated semiconducting metal oxides (SMOs) have currently aroused extensive attention by virtue of the unique electronic and catalytic properties of noble metals. This review highlights the research progress on the designs and applications of different noble metal-decorated SMOs with diverse nanostructures (e.g., nanoparticles, nanowires, nanorods, nanosheets, nanoflowers, and microspheres) for high-performance gas sensors with higher response, faster response/recovery speed, lower operating temperature, and ultra-low detection limits. The key topics include Pt, Pd, Au, other noble metals (e.g., Ag, Ru, and Rh.), and bimetals-decorated SMOs containing ZnO, SnO2, WO3, other SMOs (e.g., In2O3, Fe2O3, and CuO), and heterostructured SMOs. In addition to conventional devices, the innovative applications like photo-assisted room temperature gas sensors and mechanically flexible smart wearable devices are also discussed. Moreover, the relevant mechanisms for the sensing performance improvement caused by noble metal decoration, including the electronic sensitization effect and the chemical sensitization effect, have also been summarized in detail. Finally, major challenges and future perspectives towards noble metal-decorated SMOs-based chemiresistive gas sensors are proposed.
Collapse
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, People's Republic of 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, People's Republic of China
| | - Li-Wen Mao
- School of Opto-Electronic Information and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, People's Republic of China
| | - Xue-Yan Wu
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, People's Republic of China
| | - Yi-Ping Liu
- State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Hong-Liang Lu
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, People's Republic of China.
| |
Collapse
|
7
|
John RAB, Ruban Kumar A. Tuning the p-type conductivity of NiO for the room temperature formaldehyde detection. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
8
|
Impact of Ag on the Limit of Detection towards NH3-Sensing in Spray-Coated WO3 Thin-Films. SENSORS 2022; 22:s22052033. [PMID: 35271180 PMCID: PMC8915039 DOI: 10.3390/s22052033] [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: 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.
Collapse
|
9
|
Design and optimization strategies of metal oxide semiconductor nanostructures for advanced formaldehyde sensors. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214280] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
10
|
Du L, Sun H. Facile synthesis of ZnO/SnO 2 hybrids for highly selective and sensitive detection of formaldehyde. NEW J CHEM 2022. [DOI: 10.1039/d1nj06186k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The ZnO–SnO2 hybrids show high gas responses and good selectivity to formaldehyde.
Collapse
Affiliation(s)
- Liyong Du
- Department of Materials and Chemical Engineering, Taiyuan University, Taiyuan 030032, P. R. China
| | - Heming Sun
- College of Physics, Jilin University, Changchun 130012, P. R. China
| |
Collapse
|
11
|
Li J, Ding Q, Mo X, Zou Z, Cheng P, Li Y, Sun K, Fu Y, Wang Y, He D. A highly stable and sensitive ethanol sensor based on Ru-decorated 1D WO 3 nanowires. RSC Adv 2021; 11:39130-39141. [PMID: 35492475 PMCID: PMC9044460 DOI: 10.1039/d1ra06623d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 11/20/2021] [Indexed: 12/19/2022] Open
Abstract
Decorating materials with noble metal catalysts is an effective method for optimizing the sensing performance of sensors based on tungsten trioxide (WO3) nanowires. Ruthenium (Ru) exhibits excellent catalytic activity for oxygen adsorption/desorption and chemical reactions between gases and adsorbed oxygen. Herein, small Ru nanoparticles were uniformly distributed on the surface of one-dimensional WO3 nanowires. The nanowires were prepared by the electrospinning method through an ultraviolet (UV) irradiation process, and decoration with Ru did not change their morphology. A sensor based on 4% Ru nanowires (NWs) shows the highest response (∼120) to 100 ppm ethanol, which was increased around 47 times, and the lowest ethanol detection limit (221 ppb) at a lower temperature (200 °C) displays outstanding repeatability and stability even after 45 days or in higher-humidity conditions. Moreover, it also has faster response–recovery features. The improvement in the sensing performance was attributed to the stable morphology of the nanowires, the sensitization effect of Ru, the catalytic effect of RuO2 and the optimal atomic utilization efficiency. This work offers an effective and promising strategy for promoting the ethanol sensing performance of WO3. Decorating Ru does not effect the morphology of NWs, increased the oxygen vacancies, adsorbed oxygen. This strategy results in a better sensing performance (∼120 to 100 ppm ethanol was increased around 47 times at 200 °C) and humidity resistance.![]()
Collapse
Affiliation(s)
- Jianjun Li
- School of Physical Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Qiongling Ding
- School of Physical Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Xichao Mo
- School of Physical Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Zihao Zou
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Pu Cheng
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Yiding Li
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Kai Sun
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Yujun Fu
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Yanrong Wang
- School of Physical Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Deyan He
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| |
Collapse
|
12
|
John RAB, Ruban Kumar A. A review on resistive-based gas sensors for the detection of volatile organic compounds using metal-oxide nanostructures. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108893] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
|
13
|
Navale S, Shahbaz M, Mirzaei A, Kim SS, Kim HW. Effect of Ag Addition on the Gas-Sensing Properties of Nanostructured Resistive-Based Gas Sensors: An Overview. SENSORS (BASEL, SWITZERLAND) 2021; 21:6454. [PMID: 34640775 PMCID: PMC8513043 DOI: 10.3390/s21196454] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 01/03/2023]
Abstract
Nanostructured semiconducting metal oxides (SMOs) are among the most popular sensing materials for integration into resistive-type gas sensors owing to their low costs and high sensing performances. SMOs can be decorated or doped with noble metals to further enhance their gas sensing properties. Ag is one of the cheapest noble metals, and it is extensively used in the decoration or doping of SMOs to boost the overall gas-sensing performances of SMOs. In this review, we discussed the impact of Ag addition on the gas-sensing properties of nanostructured resistive-based gas sensors. Ag-decorated or -doped SMOs often exhibit better responsivities/selectivities at low sensing temperatures and shorter response times than those of their pristine counterparts. Herein, the focus was on the detection mechanism of SMO-based gas sensors in the presence of Ag. This review can provide insights for research on SMO-based gas sensors.
Collapse
Affiliation(s)
- Sachin Navale
- Division of Materials Science and Engineering, Hanyang University, Seoul 04763, Korea;
- The Research Institute of Industrial Science, Hanyang University, Seoul 04763, Korea
- Department of Materials Science and Engineering, Inha University, Incheon 22212, Korea
| | - Mehrdad Shahbaz
- Department of Materials Science and Engineering, Faculty of Engineering, Urmia University, Urmia 5756-151818, Iran
| | - Ali Mirzaei
- Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz 71557-13876, Iran;
| | - Sang Sub Kim
- Department of Materials Science and Engineering, Inha University, Incheon 22212, Korea
| | - Hyoun Woo Kim
- Division of Materials Science and Engineering, Hanyang University, Seoul 04763, Korea;
- The Research Institute of Industrial Science, Hanyang University, Seoul 04763, Korea
| |
Collapse
|
14
|
Gu F, Di M, Han D, Hong S, Wang Z. Atomically Dispersed Au on In 2O 3 Nanosheets for Highly Sensitive and Selective Detection of Formaldehyde. ACS Sens 2020; 5:2611-2619. [PMID: 32786391 DOI: 10.1021/acssensors.0c01074] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
As an important industrial chemical, formaldehyde is used in various fields but is harmful to health. Developing a convenient detection device for formaldehyde is significant. Based on atomically dispersed Au on In2O3 nanosheets, a formaldehyde sensor was fabricated in this work. The highly dispersed Au obtained by the ultraviolet (UV) light-assisted reduction method helps improve the sensing performance. A meager loading amount (0.01 wt %) of Au on In2O3 nanosheets exhibits high sensitivity toward ppb-level formaldehyde. Au acts as an electron sink and promotes the oxidation of formaldehyde. Atomically dispersed Au on In2O3 nanosheets decreases the activation energy and increases the number of active sites, which result in a highly efficient conversion of formaldehyde and a marked resistance change of the fabricated sensors. The selective adsorption and oxidation of formaldehyde on single atom Au's uniform sites establish excellent selectivity. Besides, the sensor exhibits short response/recovery time and excellent stability, with promising applications in formaldehyde detection.
Collapse
Affiliation(s)
- Fubo Gu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Mengyu Di
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Dongmei Han
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Song Hong
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhihua Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| |
Collapse
|
15
|
Wang X, Liu F, Chen X, Lu G, Song X, Tian J, Cui H, Zhang G, Gao K. SnO2 core-shell hollow microspheres co-modification with Au and NiO nanoparticles for acetone gas sensing. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.02.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|