1
|
Wu Z, Chen Z, Deng Z, Dai N, Sun Y, Ge M. A high-performance room-temperature NH 3 gas sensor based on WO 3/TiO 2 nanocrystals decorated with Pt NPs. RSC Adv 2024; 14:12225-12234. [PMID: 38628481 PMCID: PMC11019483 DOI: 10.1039/d4ra00881b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 04/01/2024] [Indexed: 04/19/2024] Open
Abstract
In this work, a high-performance room-temperature ammonia (NH3) gas sensor based on Pt-modified WO3-TiO2 nanocrystals was synthesized via a two-step hydrothermal method. The structural properties were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The 10 at% Pt@WO3-TiO2 nanocrystals present the highest NH3 sensing performance at room temperature. Compared with the nanocrystals without Pt modification, the sensitivity of the Pt@WO3-TiO2 sensor is tenfold higher, with the lowest concentration threshold reaching the 75 ppb level. The response is approximately 92.28 to 50 ppm, and response and recovery times are 23 s and 8 s, respectively. The improved sensing was attributed to a synergetic mechanism involving the space charge layer effect and Pt metal sensitization, enhancing the electron transfer efficiency, oxygen vacancy and specific surface area. This study is expected to guide the development of high-performance room-temperature ammonia sensors for clinical breath testing.
Collapse
Affiliation(s)
- Zhixuan Wu
- School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 China
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences Shanghai 200083 China
| | - Zhengai Chen
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences Shanghai 200083 China
| | - Zhixiang Deng
- 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
| | - Yan Sun
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences Shanghai 200083 China
| | - Meiying Ge
- National Engineering Research Center for Nanotechnology Shanghai 200241 PR China
| |
Collapse
|
2
|
Casanova-Chafer J, Garcia-Aboal R, Llobet E, Atienzar P. Enhanced CO 2 Sensing by Oxygen Plasma-Treated Perovskite-Graphene Nanocomposites. ACS Sens 2024; 9:830-839. [PMID: 38320174 DOI: 10.1021/acssensors.3c02166] [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: 02/08/2024]
Abstract
Carbon dioxide (CO2) is a major greenhouse gas responsible for global warming and climate change. The development of sensitive CO2 sensors is crucial for environmental and industrial applications. This paper presents a novel CO2 sensor based on perovskite nanocrystals immobilized on graphene and functionalized with oxygen plasma treatment. The impact of this post-treatment method was thoroughly investigated using various characterization techniques, including Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The detection of CO2 at parts per million (ppm) levels demonstrated that the hybrids subjected to 5 min of oxygen plasma treatment exhibited a 3-fold improvement in sensing performance compared to untreated layers. Consequently, the CO2 sensing capability of the oxygen-treated samples showed a limit of detection and limit of quantification of 6.9 and 22.9 ppm, respectively. Furthermore, the influence of ambient moisture on the CO2 sensing performance was also evaluated, revealing a significant effect of oxygen plasma treatment.
Collapse
Affiliation(s)
- Juan Casanova-Chafer
- Chimie des Interactions Plasma Surface, Université de Mons, Mons 7000, Belgium
- Universitat Rovira i Virgili, Tarragona 43007, Spain
| | - Rocio Garcia-Aboal
- Instituto de Tecnología Química, CSIC-UPV, Universitat Politècnica de València, Valencia 46022, Spain
| | - Eduard Llobet
- Universitat Rovira i Virgili, Tarragona 43007, Spain
- Research Institute in Sustainability, Climate Change and Energy Transition (IU-RESCAT), Vila-seca 43480, Spain
| | - Pedro Atienzar
- Instituto de Tecnología Química, CSIC-UPV, Universitat Politècnica de València, Valencia 46022, Spain
| |
Collapse
|
3
|
Lin TH, Chang YH, Hsieh TH, Huang YC, Wu MC. Electrospun SnO 2/WO 3 Heterostructure Nanocomposite Fiber for Enhanced Acetone Vapor Detection. Polymers (Basel) 2023; 15:4318. [PMID: 37959998 PMCID: PMC10647394 DOI: 10.3390/polym15214318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 10/30/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023] Open
Abstract
Volatile organic compounds (VOCs), often invisible but potentially harmful, are prevalent in industrial and laboratory settings, posing health risks. Detecting VOCs in real-time with high sensitivity and low detection limits is crucial for human health and safety. The optical sensor, utilizing the gasochromic properties of sensing materials, offers a promising way of achieving rapid responses in ambient environments. In this study, we investigated the heterostructure of SnO2/WO3 nanoparticles and employed it as the primary detection component. Using the electrospinning technique, we fabricated a sensing fiber containing Ag NPs, poly(methyl methacrylate) (PMMA), and SnO2/WO3 (PMMA-Ag-SnO2/WO3) for acetone vapor detection. Following activation via UV/ozone treatment, we observed charge migration between WO3 and SnO2, resulting in a substantial generation of superoxide radicals on SnO2 nanoparticles. This phenomenon facilitates structural deformation of the fiber and alters the oxidation state of tungsten ions, ultimately leading to a significant change in extinction when exposed to acetone vapor. As a result, PMMA-Ag-SnO2/WO3 fiber achieves a detection limit of 100 ppm and a response time of 1.0 min for acetone detection. These findings represent an advancement in the development of sensitive and selective VOC sensing devices.
Collapse
Affiliation(s)
- Ting-Han Lin
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan; (T.-H.L.); (Y.-H.C.); (T.-H.H.)
| | - Yin-Hsuan Chang
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan; (T.-H.L.); (Y.-H.C.); (T.-H.H.)
| | - Ting-Hung Hsieh
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan; (T.-H.L.); (Y.-H.C.); (T.-H.H.)
| | - Yu-Ching Huang
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan; (T.-H.L.); (Y.-H.C.); (T.-H.H.)
- Department of Materials Engineering, Ming-Chi University of Technology, New Taipei City 24301, Taiwan
| | - Ming-Chung Wu
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan; (T.-H.L.); (Y.-H.C.); (T.-H.H.)
- Department of Materials Engineering, Ming-Chi University of Technology, New Taipei City 24301, Taiwan
- Center for Sustainability and Energy Technologies, Chang Gung University, Taoyuan 33302, Taiwan
- Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital at Linkou, Taoyuan 33305, Taiwan
| |
Collapse
|
4
|
Zhu X, Li Y, Cao P, Li P, Xing X, Yu Y, Guo R, Yang H. Recent Advances of Graphene Quantum Dots in Chemiresistive Gas Sensors. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2880. [PMID: 37947725 PMCID: PMC10647816 DOI: 10.3390/nano13212880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/20/2023] [Accepted: 10/28/2023] [Indexed: 11/12/2023]
Abstract
Graphene quantum dots (GQDs), as 0D graphene nanomaterials, have aroused increasing interest in chemiresistive gas sensors owing to their remarkable physicochemical properties and tunable electronic structures. Research on GQDs has been booming over the past decades, and a number of excellent review articles have been provided on various other sensing principles of GQDs, such as fluorescence-based ion-sensing, bio-sensing, bio-imaging, and electrochemical, photoelectrochemical, and electrochemiluminescence sensing, and therapeutic, energy and catalysis applications. However, so far, there is no single review article on the application of GQDs in the field of chemiresistive gas sensing. This is our primary inspiration for writing this review, with a focus on the chemiresistive gas sensors reported using GQD-based composites. In this review, the various synthesized strategies of GQDs and its composites, gas sensing enhancement mechanisms, and the resulting sensing characteristics are presented. Finally, the current challenges and future prospects of GQDs in the abovementioned application filed have been discussed for the more rational design of advanced GQDs-based gas-sensing materials and innovative gas sensors with novel functionalities.
Collapse
Affiliation(s)
- Xiaofeng Zhu
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;
- Institute for Smart Ageing, Beijing Academy of Science and Technology, Beijing 100089, China; (Y.L.); (P.C.); (P.L.); (X.X.); (Y.Y.)
| | - Yongzhen Li
- Institute for Smart Ageing, Beijing Academy of Science and Technology, Beijing 100089, China; (Y.L.); (P.C.); (P.L.); (X.X.); (Y.Y.)
| | - Pei Cao
- Institute for Smart Ageing, Beijing Academy of Science and Technology, Beijing 100089, China; (Y.L.); (P.C.); (P.L.); (X.X.); (Y.Y.)
| | - Peng Li
- Institute for Smart Ageing, Beijing Academy of Science and Technology, Beijing 100089, China; (Y.L.); (P.C.); (P.L.); (X.X.); (Y.Y.)
| | - Xinzhu Xing
- Institute for Smart Ageing, Beijing Academy of Science and Technology, Beijing 100089, China; (Y.L.); (P.C.); (P.L.); (X.X.); (Y.Y.)
| | - Yue Yu
- Institute for Smart Ageing, Beijing Academy of Science and Technology, Beijing 100089, China; (Y.L.); (P.C.); (P.L.); (X.X.); (Y.Y.)
| | - Ruihua Guo
- Institute for Smart Ageing, Beijing Academy of Science and Technology, Beijing 100089, China; (Y.L.); (P.C.); (P.L.); (X.X.); (Y.Y.)
| | - Hui Yang
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;
| |
Collapse
|
5
|
Casanova-Chafer J. Advantages of Slow Sensing for Ambient Monitoring: A Practical Perspective. SENSORS (BASEL, SWITZERLAND) 2023; 23:8784. [PMID: 37960483 PMCID: PMC10647210 DOI: 10.3390/s23218784] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023]
Abstract
Air pollution is a ubiquitous threat, affecting 99% of the global populace and causing millions of premature deaths annually. Monitoring ambient air quality is essential, aiding policymakers and environmental agencies in timely interventions. This study delves into the advantages of slower gas sensors over their ultrafast counterparts, with a keen focus on their practicality in real-world scenarios. Slow sensors offer accurate time-averaged exposure assessments, harmonizing with established regulatory benchmarks. Their heightened precision and reliability, complemented by their cost-effectiveness, render them eminently suitable for large-scale deployment. The slow sensing ensures compatibility with regulations, fostering robust risk management practices. In contrast, ultrafast sensors, while claiming rapid detection, despite touting swift detection capabilities, grapple with formidable challenges. The sensitivity of ultrafast sensors to uncontrolled atmospheric effects, fluctuations in pressure, rapid response times, and uniform gas dispersion poses significant hurdles to their reliability. Addressing these issues assumes paramount significance in upholding the integrity of air quality assessments.
Collapse
Affiliation(s)
- Juan Casanova-Chafer
- Chimie des Interactions Plasma Surface, Institute for Materials Science and Engineering, Université de Mons, Place du Parc 23, 7000 Mons, Belgium
| |
Collapse
|
6
|
Alsulaim GM. Effective Reinforcement of Visible Light Photocatalytic and Gas Sensing Characteristics of Nanocrystalline TiO 2: Gd-Based Nb and Mo Dopants. Molecules 2023; 28:7239. [PMID: 37959663 PMCID: PMC10648698 DOI: 10.3390/molecules28217239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023] Open
Abstract
Efficient compositions for the selective detection of ethanol gas and the removal of organic contaminants were realized by codoping of (Gd, Nb) and (Gd, Mo) ions into TiO2. TiO2, Ti0.96Gd0.01Nb0.03O2, and Ti0.96Gd0.01Mo0.03O2 samples were prepared by a coprecipitation method. For all compositions, a crystalline anatase phase of TiO2 was detected. Compared to pure TiO2, the absorption edges of Ti0.96Gd0.01Nb0.03O2 and Ti0.96Gd0.01Mo0.03O2 samples were red-shifted, further broadening towards visible light. The morphological studies demonstrate that the grains of TiO2 were more refined after (Gd, Nb) and (Gd, Mo) codoping. The photocatalytic efficiency of the Ti0.96Gd0.01Mo0.03O2 catalyst for degrading 20 mg/L reactive yellow 145, brilliant green, and amoxicillin was 98, 95, and 93% in 90 min, respectively. The reusability experiments indicate that the Ti0.96Gd0.01Mo0.03O2 catalyst had high stability during reuse. The high photocatalytic activity of the Ti0.96Gd0.01Mo0.03O2 catalyst was correlated to the broad visible-light absorption and effective separation of electron-hole pairs by Gd3+ and Mo6+ cations. The gas sensing characteristic is reflected by the high sensitivity of the Ti0.96Gd0.01Nb0.03O2 sensor to ethanol gas in the presence of different gases at 275 °C. The obtained results indicated that the (Gd, Mo) mixture could more effectively induce the photocatalytic properties of TiO2 while (Gd, Nb) dopants were the best for reinforcing its sensing characteristics.
Collapse
Affiliation(s)
- Ghayah M Alsulaim
- Department of Chemistry, Faculty of Science, King Faisal University, Al Ahsa 31982, Saudi Arabia
| |
Collapse
|
7
|
Dong C, Tian R, Qu H, Tan H, Chen G, Guan H, Yin Z. Anchoring Pt Particles onto Mesoporousized ZnO Holey Cubes for Triethylamine Detection with Multifaceted Superiorities. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2300756. [PMID: 37078834 DOI: 10.1002/smll.202300756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/23/2023] [Indexed: 05/03/2023]
Abstract
Designing sensing materials with integrating unique spatial structures, functional units, and surface activity is vital to achieve high-performance gas sensor toward triethylamine (TEA) detection. Herein, a simple spontaneous dissolution is used with subsequent thermal decomposition strategy to fabricate mesoporousized ZnO holey cubes. The squaric acid is crucial to coordinate Zn2+ to form a cubic shape (ZnO-0) and then tailor the inner part to open a holey cube with simultaneously mesoporousizing the left cubic body (ZnO-72). To enhance the sensing performance, the mesoporous ZnO holey cubes have been functionalized with catalytic Pt nanoparticles, which deliver superior performances including high response, low detection limit, and fast response and recovery time. Notably, the response of Pt/ZnO-72 towards 200 ppm TEA is up to 535, which is much higher than those of 43 and 224 for pristine ZnO-0 and ZnO-72. A synergistic mechanism combining the intrinsic merits of ZnO, its unique mesoporous holey cubic structure, the oxygen vacancies, and the catalytic sensitization effect of Pt has been proposed for the significant enhancement in TEA sensing. Our work provides an effective facile approach to fabricate an advanced micro-nano architecture with manipulating its spatial structure, functional units, and active mesoporous surface for promising TEA gas sensors.
Collapse
Affiliation(s)
- Chengjun Dong
- School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Ruonan Tian
- School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Honglong Qu
- School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Huai Tan
- School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Gang Chen
- School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Hongtao Guan
- School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Zongyou Yin
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| |
Collapse
|