1
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Huang L, Peng T, Wang R, He B, Jin J, Wang H, Gong Y. Construction of hierarchical In 2O 3/In 2S 3-ZnCdS ternary microsphere heterostructures for efficient photocatalytic nitrogen fixation. Dalton Trans 2024; 53:12291-12300. [PMID: 38984478 DOI: 10.1039/d4dt01605j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
Photocatalytic ammonia production holds immense promise as an environmentally sustainable approach to nitrogen fixation. In this study, In2O3/In2S3-ZnCdS ternary heterostructures were successfully constructed through an innovative in situ anion exchange process, coupled with a low-temperature hydrothermal method for ZnCdS (ZCS) incorporation. The resulting In2O3/In2S3-ZCS photocatalyst was proved to be highly efficient in converting N2 to NH3 under mild conditions, eliminating the need for sacrificial agents or precious metal catalysts. Notably, the NH4+ yield of In2O3/In2S3-0.5ZCS reached a significant level of 71.2 μmol g-1 h-1, which was 10.47 times higher than that of In2O3 (6.8 μmol g-1 h-1) and 3.22 times higher than that of In2O3/In2S3 (22.1 μmol g-1 h-1). This outstanding performance can be attributed to the ternary heterojunction configuration, which significantly extends the lifetime of photogenerated carriers and enhances the spatial separation of electrons and holes. The synergistic interplay between CdZnS, In2S3, and In2O3 in the heterojunction facilitates electron transport, thereby boosting the rate of the photocatalytic nitrogen fixation reaction. Our study not only validates the efficacy of ternary heterojunctions in photocatalytic nitrogen fixation but also offers valuable insights for the design and construction of such catalysts for future applications.
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Affiliation(s)
- Liangliang Huang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.
| | - Tao Peng
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.
| | - Rui Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.
| | - Beibei He
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.
| | - Jun Jin
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.
| | - Huanwen Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.
| | - Yansheng Gong
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China.
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2
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Bu W, Zhou Y, Huang D, Liu N, Zhang Y, Han W, Chuai X, Zhou Z, Hu C, Lu G. Ppb-level unsymmetrical dimethylhydrazine detection based on In 2O 3 hollow microspheres with Nd doping. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134508. [PMID: 38754234 DOI: 10.1016/j.jhazmat.2024.134508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/17/2024] [Accepted: 04/30/2024] [Indexed: 05/18/2024]
Abstract
As one of main high-energy fuels for rocket launching, unsymmetrical dimethylhydrazine (UDMH) and its decomposition products do harm to environment and human health. It is significant to develop a device to monitor its leakage. In this work, a UDMH gas sensor based on In2O3 hollow microspheres with Nd dopant was fabricated. The pure, 1.0 mol%, 3.0 mol% and 5.0 mol% Nd doped In2O3 were synthesized via one-step solvothermal method. Among them, 3.0% Nd-In2O3 based sensor exhibits the highest response toward UDMH vapor. Its response value to 100 ppm UDMH is 183.3 at optimal working temperature of 250 °C, 6.8 times higher than that of pure In2O3 (26.8). Besides high response to UDMH, the 3% Nd-In2O3 based sensor represents excellent selectivity, rapid response speed (2 s) and ultra-low theoretical LOD to UDMH (0.28 ppb). The improved gas sensing performance via Nd doping could be attributed to the enhanced specific surface area, increased concentration of adsorbed oxygen and improved adsorption capacity for UDMH molecular on the surface. The excellent sensing performance of Nd doped In2O3 hollow microspheres makes it a promising candidate for real-time UDMH detection.
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Affiliation(s)
- Weiyi Bu
- State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - You Zhou
- State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Dan Huang
- High-Tech Institute of Xi'an, Xi'an, Shaanxi Province 710025, China
| | - Na Liu
- State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Yan Zhang
- State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Wenjiang Han
- State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Xiaohong Chuai
- State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Zhijie Zhou
- High-Tech Institute of Xi'an, Xi'an, Shaanxi Province 710025, China
| | - Changhua Hu
- High-Tech Institute of Xi'an, Xi'an, Shaanxi Province 710025, China
| | - Geyu Lu
- State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Advanced Gas Sensors, Jilin Province, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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3
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Kgomo M, Swart HC, Mhlongo GH. Engineering of Mesoporous Cube-like In 2O 3 Products as Ethanol Detection Platform at Low Operating Temperature: Effects of Different Transition Metals as Dopant Ions. ACS OMEGA 2024; 9:6325-6338. [PMID: 38371839 PMCID: PMC10870419 DOI: 10.1021/acsomega.3c04453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 09/26/2023] [Indexed: 02/20/2024]
Abstract
Although most semiconductor metal oxides including In2O3 show acceptable sensitivity to volatile organic compounds, it is difficult to detect ethanol effectively at low operating temperatures and detection levels. In this study, pure and Co-, Ni-, and Cu-doped In2O3 products with their doping content maintained at 1 mol % were successfully produced using a hydrothermal approach. Explicit contrast on the structural, microstructural, and textural properties of the synthesized In2O3 products was examined to determine their gas sensing performance. The Cu-doped In2O3 sensor demonstrated improved response of 15.3 to 50 ppm ethanol and has satisfactory selectivity, stability, low detection limit of 0.2, humidity resistance, and decreased working temperature of 80 °C compared to 150 °C of the pure In2O3 sensor. This optimal gas sensing performance is derived from the cube-like morphology assembled with interlinked nanoparticles, which favors trapping more target gas molecules and exposing more active sites, thereby greatly improving its sensing ability. This study showed that the Cu-doped In2O3 sensor with 1 mol % is suitable for monitoring ethanol gas for food safety applications.
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Affiliation(s)
- Mosima
B. Kgomo
- Centre
for Nanostructures and Advanced Materials (CeNAM), DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
- Department
of Physics, University of the Free State, Bloemfontein ZA9300, South Africa
| | - Hendrik C. Swart
- Department
of Physics, University of the Free State, Bloemfontein ZA9300, South Africa
| | - Gugu H. Mhlongo
- Centre
for Nanostructures and Advanced Materials (CeNAM), DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
and Industrial Research, Pretoria 0001, South Africa
- Department
of Physics, University of the Free State, Bloemfontein ZA9300, South Africa
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4
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Liu H, Li Q, Ma Y, Wang S, Wang Y, Zhao B, Zhao L, Jiang Z, Xu L, Ruan W. Study of charge transfer contribution in Surface-Enhanced Raman scattering (SERS) based on indium oxide nanoparticle substrates. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123168. [PMID: 37515886 DOI: 10.1016/j.saa.2023.123168] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 07/06/2023] [Accepted: 07/16/2023] [Indexed: 07/31/2023]
Abstract
Surface-enhanced Raman scattering (SERS) has outstanding merits in biochemical molecular analysis, and the development of new SERS substrates is the focus of research. Herein, In2O3 nanoparticles (NPs) were synthesized by a high temperature pyrolysis method with cubic phase and small particle size at 10 nm. The structures and properties of In2O3 NPs were characterized by X-ray powder diffraction (XRD), transmission electron microscope (TEM) and other characterization methods. Additionally, the SERS spectra of In2O3-MBA with the enhancement factor (EF) up to 1.22 × 104 is discussed. The results demonstrate that there is a charge transfer (CT) effect revealed between the adsorbed molecules of 4-mercaptobenzoic acid (4-MBA) and the substrates of In2O3 NPs, and it could be excited by long wavelength energy. Based on the In2O3 NPs, the study is beneficial to develop more potential semiconductor SERS substrates.
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Affiliation(s)
- Hongye Liu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Qianwen Li
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yan Ma
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Siyu Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yanan Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Lichun Zhao
- Changchun Shunfeng New Materials Co., Ltd. & Jilin Shunfeng Agricultural Technology Co., Ltd., Changchun 130114, PR China
| | - Ziping Jiang
- Department of Hand and Foot Surgery, First Hospital of Jilin University, Jilin University, Changchun 130021, PR China.
| | - Lili Xu
- Changchun Shunfeng New Materials Co., Ltd. & Jilin Shunfeng Agricultural Technology Co., Ltd., Changchun 130114, PR China.
| | - Weidong Ruan
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China.
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5
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He ZK, Zhao J, Li K, Zhao J, He H, Gao Z, Song YY. Rational Integration of SnMOF/SnO 2 Hybrid on TiO 2 Nanotube Arrays: An Effective Strategy for Accelerating Formaldehyde Sensing Performance at Room Temperature. ACS Sens 2023; 8:4189-4197. [PMID: 37870917 DOI: 10.1021/acssensors.3c01525] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
Formaldehyde is ubiquitously found in the environment, meaning that real-time monitoring of formaldehyde, particularly indoors, can have a significant impact on human health. However, the performance of commercially available interdigital electrode-based sensors is a compromise between active material loading and steric hindrance. In this work, a spaced TiO2 nanotube array (NTA) was exploited as a scaffold and electron collector in a formaldehyde sensor for the first time. A Sn-based metal-organic framework was successfully decorated on the inside and outside of TiO2 nanotube walls by a facile solvothermal decoration strategy. This was followed by regulated calcination, which successfully integrated the preconcentration effect of a porous Sn-based metal-organic framework (SnMOF) structure and highly active SnO2 nanocrystals into the spaced TiO2 NTA to form a Schottky heterojunction-type gas sensor. This SnMOF/SnO2@TiO2 NTA sensor achieved a high room-temperature formaldehyde response (1.7 at 6 ppm) with a fast response (4.0 s) and recovery (2.5 s) times. This work provides a new platform for preparing alternatives to interdigital electrode-based sensors and offers an effective strategy for achieving target preconcentrations for gas sensing processes. The as-prepared SnMOF/SnO2@TiO2 NTA sensor demonstrated excellent sensitivity, stability, reproducibility, flexibility, and convenience, showing excellent potential as a miniaturized device for medical diagnosis, environmental monitoring, and other intelligent sensing systems.
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Affiliation(s)
- Zhen-Kun He
- College of Science, Northeastern University, Shenyang 110819, China
| | - Jiahui Zhao
- College of Science, Northeastern University, Shenyang 110819, China
| | - Keke Li
- College of Science, Northeastern University, Shenyang 110819, China
| | - Junjian Zhao
- College of Science, Northeastern University, Shenyang 110819, China
| | - Haoxuan He
- College of Science, Northeastern University, Shenyang 110819, China
| | - Zhida Gao
- College of Science, Northeastern University, Shenyang 110819, China
| | - Yan-Yan Song
- College of Science, Northeastern University, Shenyang 110819, China
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6
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Liu F, Song H, Wu L, Zhao J, Yao X, Fu K, Jin Z, Liu J, Wang F, Wang Z. Excellent NO2 gas sensor based on the oxygen inhibiting effect of Ni3+-doped WO3. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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7
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Jiang K, Chen T, Sun J, Quan H, Zhou T. Pd/Pt-Bimetallic-Nanoparticle-Doped In 2O 3 Hollow Microspheres for Rapid and Sensitive H 2S Sensing at Low Temperature. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:668. [PMID: 36839036 PMCID: PMC9963627 DOI: 10.3390/nano13040668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
H2S is a poisonous gas that is widespread in nature and human activities. Its rapid and sensitive detection is essential to prevent it from damaging health. Herein, we report Pd- and Pt-bimetallic-nanoparticle-doped In2O3 hollow microspheres that are synthesized using solvothermal and in situ reduction methods for H2S detection. The structure of as-synthesized 1 at% Pd/Pt-In2O3 comprises porous hollow microspheres assembled from In2O3 nanosheets with Pd and Pt bimetallic nanoparticles loaded on its surface. The response of 1 at% Pd/Pt-In2O3 to 5 ppm H2S is 140 (70 times that of pure In2O3), and the response time is 3 s at a low temperature of 50 °C. In addition, it can detect trace H2S (as low as 50 ppb) and has superior selectivity and an excellent anti-interference ability. These outstanding gas-sensing performances of 1 at% Pd/Pt-In2O3 are attributed to the chemical sensitization of Pt, the electronic sensitization of Pd, and the synergistic effect between them. This work supplements the research of In2O3-based H2S sensors and proves that Pd- and Pt-bimetallic-doped In2O3 can be applied in the detection of H2S.
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Affiliation(s)
- Kaisheng Jiang
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100194, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tingting Chen
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100194, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianhai Sun
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100194, China
| | - Hao Quan
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100194, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tianye Zhou
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100194, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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8
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Han Z, Tang Y, Lu G, Qi Y, Wu H, Yang Z, Han H, Zhang X, Wu L, Wang Z, Liu J, Wang F. Transition metal elements-doped SnO 2 for ultrasensitive and rapid ppb-level formaldehyde sensing. Heliyon 2023; 9:e13486. [PMID: 36814628 PMCID: PMC9939605 DOI: 10.1016/j.heliyon.2023.e13486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 01/25/2023] [Accepted: 02/01/2023] [Indexed: 02/05/2023] Open
Abstract
Pristine SnO2, Fe-doped SnO2 and Ni-doped SnO2 were synthesized using facile hydrothermal method. Analysis based on XRD, TEM and UV-Vis DRS measurements demonstrated the successful insertion of Fe and Ni dopants into SnO2 crystal. Formaldehyde-detection measurements revealed that transition metal-doped SnO2 exhibited improved formaldehyde-sensing properties compared with that of pristine SnO2. When the amount of incorporated dopant (Fe or Ni) was 4 at.%, the most effective enhancement on sensing performance of SnO2 was obtained. At 160 °C, the 4 at.% Fe-SnO2 and 4 at.% Ni-SnO2 exhibited higher response values of 7.52 and 4.37 with exposure to low-concentration formaldehyde, respectively, which were 2.4 and 1.4 times higher than that of pristine SnO2. The change of electronic structure and crystal structure as well as catalytic effect of transition metals are chiefly responsible for the enhanced sensing properties.
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Affiliation(s)
- Zejun Han
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China
| | - Yunxiang Tang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China
| | - Guixia Lu
- School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China,Corresponding author.
| | - Yuan Qi
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China
| | - Hao Wu
- School of Energy and Environment, City University of Hong Kong, Hong Kong, China
| | - Zhengyi Yang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China
| | - Hecheng Han
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China
| | - Xue Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China
| | - Lili Wu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China,Corresponding author.
| | - Zhou Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China
| | - Jiurong Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China,Corresponding author.
| | - Fenglong Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China,Shenzhen Research Institute of Shandong University, A301 Virtual University Park in South District of Nanshan High-tech Zone, Shenzhen, China,Corresponding author. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, Shandong 250061, China.
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9
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Kadhim MM, Ihsan Mahmood Helmi Al-Bayati A, Taha A, Abdullaha SA, Jassim Khalil M, Mahdi Rheima A, Hachim SK. Pristine, Co, Rh, and, Ir decorated aluminum phosphide nano-sheet semiconductors as viable chemical sensors for cathinone. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2022.110305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Ma X, Zhu H, Yu L, Li X, Ye E, Li Z, Loh XJ, Wang S. Rare-earth-doped indium oxide nanosphere-based gas sensor for highly sensitive formaldehyde detection at a low temperature. NANOSCALE 2023; 15:1609-1618. [PMID: 36602001 DOI: 10.1039/d2nr04972d] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Formaldehyde (HCHO) is widely viewed as a carcinogenic volatile organic compound in indoor air pollution that can seriously threaten human health and life. Thus, there is a critical need to develop gas sensors with improved sensing performance, including outstanding selectivity, low operating temperature, high responsiveness, and short recovery time, for HCHO detection. Currently, doping is considered an effective strategy to raise the sensing performance of gas sensors. Herein, various rare earth elements-doped indium oxide (RE-In2O3) nanospheres were fabricated as gas sensors for improved HCHO detection via a facile and environmentally solvothermal method. Such RE-In2O3 nanosphere-based sensors exhibited remarkable gas-sensing performance, including a high selectivity and stability in air. Compared with pure, Yb-, Dy-doped In2O3 and different La ratios doped into In2O3, 6% La-doped In2O3 (La-In2O3) nanosphere-based sensors demonstrated a high response value of 210 to 100 ppm at 170 °C, which was around 16 times higher than that of the pure In2O3 sensor, and also exhibited a detection limit of 10.9 ppb, and a response time of 30 s to 100 ppm HCHO with a recovery time of 160 s. Finally, such superior sensing performance of the 6% La-In2O3 sensors was proposed to be attributed to the synergistic effect of the large specific surface area and enhanced surface oxygen vacancies on the surface of In2O3 nanospheres, which produced chemisorbed oxygen species to release electrons and provided abundant reaction sites for HCHO gas. This study sheds new light on designing nanomaterials to build gas sensors for HCHO detection.
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Affiliation(s)
- Xiangyun Ma
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Houjuan Zhu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore 138634
| | - Long Yu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Xin Li
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Enyi Ye
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore 138634
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2) A*STAR (Agency for Science, Technology and Research), Singapore 138634
| | - Zibiao Li
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore 138634
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2) A*STAR (Agency for Science, Technology and Research), Singapore 138634
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore 138634
| | - Suhua Wang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
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11
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Zhang S, Sun S, Huang B, Wang N, Li X. UV-Enhanced Formaldehyde Sensor Using Hollow In 2O 3@TiO 2 Double-Layer Nanospheres at Room Temperature. ACS APPLIED MATERIALS & INTERFACES 2023; 15:4329-4342. [PMID: 36623169 DOI: 10.1021/acsami.2c19722] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Hollow In2O3@TiO2 double-layer nanospheres were prepared via a facile water bath method using the sacrifice template of carbon nanospheres. It is shown that the size of the In2O3/TiO2 nanocomposites is 150-250 nm, the thickness of the In2O3 shell is about 10 nm, and the thickness of the TiO2 shell is about 15 nm. The sensing performances of the synthesized In2O3/TiO2 nanocomposites-based chemiresistive-type sensor to formaldehyde (HCHO) gas under UV light activation at room temperature have been studied. Compared to the pure In2O3- and pure TiO2-based sensors, the In2O3/TiO2 nanocomposite sensor exhibits much better sensing performances to formaldehyde. The response of the In2O3/TiO2 nanocomposite-based sensor to 1 ppm formaldehyde is about 3.8, and the response time and recovery time are 28 and 50 s, respectively. The detectable formaldehyde concentration can reach as low as 0.06 ppm. The role of the formed In2O3/TiO2 heterojunctions and the involved chemical reactions activated by UV light have been investigated by AC impedance spectroscopy and the in situ diffuse reflectance Fourier transform infrared spectroscopy. The improvement of the sensing properties of In2O3/TiO2 nanocomposites could be attributed to the nanoheterojunctions between the two components and the "combined photocatalytic effects" of UV-light-emitting diode irradiation. Density functional theory calculations demonstrated that introducing heterojunctions could improve the adsorption energy and charge transfer between formaldehyde and sensing materials.
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Affiliation(s)
- Su Zhang
- School of Microelectronics, Center for Semiconductor Sensors and Integrated Microsystem, Dalian University of Technology, Dalian, Liaoning116024, P. R. China
| | - Shupeng Sun
- School of Microelectronics, Center for Semiconductor Sensors and Integrated Microsystem, Dalian University of Technology, Dalian, Liaoning116024, P. R. China
| | - Baoyu Huang
- School of Microelectronics, Center for Semiconductor Sensors and Integrated Microsystem, Dalian University of Technology, Dalian, Liaoning116024, P. R. China
| | - Nan Wang
- School of Microelectronics, Center for Semiconductor Sensors and Integrated Microsystem, Dalian University of Technology, Dalian, Liaoning116024, P. R. China
| | - Xiaogan Li
- School of Microelectronics, Center for Semiconductor Sensors and Integrated Microsystem, Dalian University of Technology, Dalian, Liaoning116024, P. R. China
- Key Laboratory of Integrated Circuit and Biomedical Electronic System, Dalian University of Technology, Dalian, Liaoning116023, P. R. China
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12
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Gao L, Han D, Wang Z, Gu F. Metal-organic framework MIL-68(In)-NH2-derived carbon-covered cobalt-doped bi-crystalline In2O3 tubular structures for efficient photocatalytic degradation of tetracycline hydrochloride. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.130931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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13
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Yang S, Yin H, Wang Z, Lei G, Xu H, Lan Z, Gu H. Gas sensing performance of In 2O 3 nanostructures: A mini review. Front Chem 2023; 11:1174207. [PMID: 37090242 PMCID: PMC10119416 DOI: 10.3389/fchem.2023.1174207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 03/31/2023] [Indexed: 04/25/2023] Open
Abstract
Effective detection of toxic and hazardous gases is crucial for ensuring human safety, and high-performance metal oxide-based gas sensors play an important role in achieving this goal. In2O3 is a widely used n-type metal oxide in gas sensors, and various In2O3 nanostructures have been synthesized for detecting small gas molecules. In this review, we provide a brief summary of current research on In2O3-based gas sensors. We discuss methods for synthesizing In2O3 nanostructures with various morphologies, and mainly review the sensing behaviors of these structures in order to better understand their potential in gas sensors. Additionally, the sensing mechanism of In2O3 nanostructures is discussed. Our review further indicates that In2O3-based nanomaterials hold great promise for assembling high-performance gas sensors.
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Affiliation(s)
- Shulin Yang
- Hubei Key Laboratory for Processing and Application of Catalytic Materials, School of Physics and Electronic Information, Huanggang Normal University, Huanggang, China
- Hubei Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Sciences, Hubei University, Wuhan, China
| | - Huan Yin
- Hubei Key Laboratory for Processing and Application of Catalytic Materials, School of Physics and Electronic Information, Huanggang Normal University, Huanggang, China
| | - Zhao Wang
- Hubei Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Sciences, Hubei University, Wuhan, China
| | - Gui Lei
- Hubei Key Laboratory for Processing and Application of Catalytic Materials, School of Physics and Electronic Information, Huanggang Normal University, Huanggang, China
| | - Huoxi Xu
- Hubei Key Laboratory for Processing and Application of Catalytic Materials, School of Physics and Electronic Information, Huanggang Normal University, Huanggang, China
| | - Zhigao Lan
- Hubei Key Laboratory for Processing and Application of Catalytic Materials, School of Physics and Electronic Information, Huanggang Normal University, Huanggang, China
- *Correspondence: Zhigao Lan, ; Haoshuang Gu,
| | - Haoshuang Gu
- Hubei Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Sciences, Hubei University, Wuhan, China
- *Correspondence: Zhigao Lan, ; Haoshuang Gu,
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Preparation of hollow bidirectional porous 3D peony-flower structure ZnCO3/ZnO with gas sensitive properties at room temperature. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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15
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Periyasamy V, Babu RR, Ahmad A, Albaqami MD, Alotabi RG, Elamurugu E. Spray-Deposited Rare Earth Metal Ion (Sm 3+, Ce 3+, Pr 3+, La 3+)-Doped CdO Thin Films for Enhanced Formaldehyde Gas Sensing Characteristics. ACS OMEGA 2022; 7:35191-35203. [PMID: 36211035 PMCID: PMC9535705 DOI: 10.1021/acsomega.2c04303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 09/12/2022] [Indexed: 06/16/2023]
Abstract
This study shows the electrical conductivity-dependent gas sensing characteristics of spray-deposited rare earth (RE) metal ion (Sm3+, Ce3+, Pr3+, La3+)-doped cadmium oxide (CdO) thin films on soda-lime microscope glass substrates at 300 °C. We examined the deposited films' structural, surface microstructural, DC electrical, and gas sensing features. The X-ray diffraction study indicates that all samples were polycrystalline, with the favored growth direction shifting from the (111) plane to the (200) plane. The highest root-mean-square values were obtained for the Pr-doped CdO thin film (5.86 nm). The surface microstructure of CdO thin films was significantly influenced by the RE metal ion dopant, with typical grain size values ranging from 64 nm to 134 nm depending on the dopant. The carrier concentration and resistivity of CdO films vary based on the RE metal ions used as dopants. Low resistivity (3.01 × 10-4 Ω.cm) was achieved for the CdO thin film doped with La. High gas sensitivity (71.42%) was achieved for CdO thin films doped with La. The donor dopant regulated the electrical conductivity and gas sensing capabilities of CdO thin films.
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Affiliation(s)
- Velusamy Periyasamy
- Crystal
Growth and Thin Film Laboratory, Department of Physics, Bharathidasan University, Tiruchirappalli620 024, Tamil Nadu, India
- Department
of Physics, Thiagarajar College of Engineering, Thiruparankundram, Madurai625015, Tamil Nadu, India
| | - R. Ramesh Babu
- Crystal
Growth and Thin Film Laboratory, Department of Physics, Bharathidasan University, Tiruchirappalli620 024, Tamil Nadu, India
| | - Awais Ahmad
- Departamento
de Quimica Organica, Universidad de Cordoba, EdificioMarie Curie (C-3), Ctra
Nnal IV-A, Km 396, E14014Cordoba, Spain
| | - Munirah D. Albaqami
- Chemistry
Department, College of Science, King Saud
University, Riyadh11451, Saudi Arabia
| | - Reham Ghazi Alotabi
- Chemistry
Department, College of Science, King Saud
University, Riyadh11451, Saudi Arabia
| | - Elangovan Elamurugu
- iDARE
Laboratory, Department of Physics and Nanotechnology, College of Engineering
and Technology, SRM Institute of Science
and Technology, Kattankulathur603 203, Tamilnadu, India
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16
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Mehmood S, Khan FU, Shah MN, Ma J, Yang Y, Li G, Xu W, Zhao X, He W, Pan X. A novel room-temperature formaldehyde gas sensor based on walnut-like WO3 modification on Ni–graphene composites. Front Chem 2022; 10:971859. [PMID: 36157033 PMCID: PMC9500379 DOI: 10.3389/fchem.2022.971859] [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: 06/17/2022] [Accepted: 08/12/2022] [Indexed: 11/13/2022] Open
Abstract
Ternary composite with great modulation of electron transfers has attracted a lot of attention from the field of high-performance room-temperature (RT) gas sensing. Herein, walnut-like WO3-Ni–graphene ternary composites were successfully synthesized by the hydrothermal method for formaldehyde (HCHO) sensing at RT. The structural and morphological analyses were carried out by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). SEM and TEM studies confirmed that walnut-like WO3 nanostructures with an average size of 53 ± 23 nm were functionalized. The Raman and XPS results revealed that, due to the deformation of the O-W-O lattice, surface oxygen vacancies Ov and surface-adsorbed oxygen species Oc were present. The gas-sensing measurement shows that the response of the WO3-Ni-Gr composite (86.8%) was higher than that of the Ni-Gr composite (22.7%) for 500 ppm HCHO at RT. Gas-sensing enhancement can be attributed to a p-n heterojunction formation between WO3 and Ni-Gr, Oc, spill-over effect of Ni decoration, and a special walnut-like structure. Moreover, long term stability (%R = 61.41 ± 1.66) for 30 days and high selectivity in the presence of other gases against HCHO suggested that the proposed sensor could be an ideal candidate for future commercial HCHO-sensing in a real environment.
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Affiliation(s)
- Shahid Mehmood
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
| | - Faheem Ullah Khan
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
| | - Muhmmad Naeem Shah
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
| | - Junxian Ma
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
| | - Yatao Yang
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
| | - Guijun Li
- Key Labortary of Optoelectronics Devices and System of Ministry of Education and Guangdong Province, College of Physics and Optoelctronics Engineering, Shenzhen University, Shenzhen, China
| | - Wei Xu
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
- Huazhong University of Science and Technology, Wuhan, China
| | - Xiaojin Zhao
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
| | - Wei He
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
| | - Xiaofang Pan
- College of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
- *Correspondence: Xiaofang Pan,
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17
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Wang Z, Zhu L, Wang J, Zhuang R, Mu P, Wang J, Yan W. Advances in functional guest materials for resistive gas sensors. RSC Adv 2022; 12:24614-24632. [PMID: 36128383 PMCID: PMC9426293 DOI: 10.1039/d2ra04063h] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 07/29/2022] [Indexed: 12/02/2022] Open
Abstract
Resistive gas sensors are considered promising candidates for gas detection, benefiting from their small size, ease of fabrication and operation convenience. The development history, performance index, device type and common host materials (metal oxide semiconductors, conductive polymers, carbon-based materials and transition metal dichalcogenides) of resistive gas sensors are firstly reviewed. This review systematically summarizes the functions, functional mechanisms, features and applications of seven kinds of guest materials (noble metals, metal heteroatoms, metal oxides, metal-organic frameworks, transition metal dichalcogenides, polymers, and multiple guest materials) used for the modification and optimization of the host materials. The introduction of guest materials enables synergistic effects and complementary advantages, introduces catalytic sites, constructs heterojunctions, promotes charge transfer, improves carrier transport, or introduces protective/sieving/enrichment layers, thereby effectively improving the sensitivity, selectivity and stability of the gas sensors. The perspectives and challenges regarding the host-guest hybrid materials-based gas sensors are also discussed.
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Affiliation(s)
- Ze Wang
- Department of Environmental Science and Engineering, Xi'an Key Laboratory of Solid Waste Recycling and Resource Recovery, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University 28 Xianning West Road Xi'an 710049 China
| | - Lei Zhu
- Department of Environmental Science and Engineering, Xi'an Key Laboratory of Solid Waste Recycling and Resource Recovery, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University 28 Xianning West Road Xi'an 710049 China
- School of Physics and Electrical Engineering, Weinan Normal University Chaoyang Street Weinan 714099 China
| | - Jingzhao Wang
- Department of Environmental Science and Engineering, Xi'an Key Laboratory of Solid Waste Recycling and Resource Recovery, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University 28 Xianning West Road Xi'an 710049 China
| | - Rui Zhuang
- Chambroad Chemical Industry Institute Co.,Ltd Boxing Economic Development Zone 256500 Shandong Province China
| | - Pengfei Mu
- Chambroad Chemical Industry Institute Co.,Ltd Boxing Economic Development Zone 256500 Shandong Province China
| | - Jianan Wang
- Department of Environmental Science and Engineering, Xi'an Key Laboratory of Solid Waste Recycling and Resource Recovery, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University 28 Xianning West Road Xi'an 710049 China
| | - Wei Yan
- Department of Environmental Science and Engineering, Xi'an Key Laboratory of Solid Waste Recycling and Resource Recovery, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University 28 Xianning West Road Xi'an 710049 China
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18
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Zhang X, Sun J, Tang K, Wang H, Chen T, Jiang K, Zhou T, Quan H, Guo R. Ultralow detection limit and ultrafast response/recovery of the H 2 gas sensor based on Pd-doped rGO/ZnO-SnO 2 from hydrothermal synthesis. MICROSYSTEMS & NANOENGINEERING 2022; 8:67. [PMID: 35721374 PMCID: PMC9203492 DOI: 10.1038/s41378-022-00398-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/21/2022] [Accepted: 05/10/2022] [Indexed: 06/01/2023]
Abstract
Hydrogen (H2) sensors are of great significance in hydrogen energy development and hydrogen safety monitoring. However, achieving fast and effective detection of low concentrations of hydrogen is a key problem to be solved in hydrogen sensing. In this work, we combined the excellent gas sensing properties of tin(IV) oxide (SnO2) and zinc oxide (ZnO) with the outstanding electrical properties of reduced graphene oxide (rGO) and prepared palladium (Pd)-doped rGO/ZnO-SnO2 nanocomposites by a hydrothermal method. The crystal structure, structural morphology, and elemental composition of the material were characterized by FE-SEM, TEM, XRD, XPS, Raman spectroscopy, and N2 adsorption-desorption. The results showed that the Pd-doped ZnO-SnO2 composites were successfully synthesized and uniformly coated on the surface of the rGO. The hydrogen gas sensing performance of the sensor prepared in this work was investigated, and the results showed that, compared with the pure Pd-doped ZnO-SnO2 sensor, the Pd-doped rGO/ZnO-SnO2 sensor modified with 3 wt% rGO had better hydrogen (H2)-sensing response of 9.4-100 ppm H2 at 380 °C. In addition, this sensor had extremely low time parameters (the response time and recovery time for 100 ppm H2 at 380 °C were 4 s and 8 s, respectively) and an extremely low detection limit (50 ppb). Moreover, the sensor exhibited outstanding repeatability and restoration. According to the analysis of the sensing mechanism of this nanocomposite, the enhanced sensing performance of the Pd-doped rGO/ZnO-SnO2 sensor is mainly due to the heterostructure of rGO, ZnO, and SnO2, the excellent electrical and physical properties of rGO and the synergy between rGO and Pd.
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Affiliation(s)
- Xinxiao Zhang
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, 100194 Beijing, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Jianhai Sun
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, 100194 Beijing, China
| | - Kangsong Tang
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, 100194 Beijing, China
| | - Hairong Wang
- School of Mechanical Engineering, Xi’an Jiaotong University, 710049 Xi’an, Shanxi China
| | - Tingting Chen
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, 100194 Beijing, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Kaisheng Jiang
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, 100194 Beijing, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Tianye Zhou
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, 100194 Beijing, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Hao Quan
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, 100194 Beijing, China
- School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Ruihua Guo
- Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology, 100054 Beijing, China
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19
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Highly Active Palladium-Decorated Reduced Graphene Oxides for Heterogeneous Catalysis and Electrocatalysis: Hydrogen Production from Formaldehyde and Electrochemical Formaldehyde Detection. NANOMATERIALS 2022; 12:nano12111890. [PMID: 35683743 PMCID: PMC9182065 DOI: 10.3390/nano12111890] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 05/30/2022] [Accepted: 05/30/2022] [Indexed: 01/21/2023]
Abstract
The exploitation of highly efficient and stable hydrogen generation from chemical storage of formaldehyde (FA) is of great significance to the sustainable development of the future. Moreover, developing an accurate, rapid, reliable, and cost-effective catalyst for electrochemical detection of FA in solution is appealing. Herein, we report rational construction of Pd nanoparticles decorated reduced graphene oxides (Pd/rGO) nanohybrids not only as robust catalysts to produce hydrogen from alkaline FA solution and but also electrocatalysts for electrochemical detection of FA. By optimizing the reaction parameters including FA concentration, NaOH concentration and reaction temperature, Pd/rGO with Pd loading of 0.5 wt% could exhibit a high hydrogen production rate of 272 mL g-1min-1 at room temperature of 25 °C, which is 3.2 times that of conventional Pd NPs. In addition, as-prepared Pd/rGO nanohybrids modified glassy carbon (GC) electrodes are used as FA-detected electrochemical sensors. A sensitive oxidation peak with a current density of 8.38 mA/cm2 was observed at 0.12 V (vs. Ag/AgCl) in 0.5 M NaOH containing 10 mM FA over Pd/rGO catalysts with Pd loading of 0.5 wt%. The results showed the prepared Pd/rGO nanocatalyst not only exhibited efficient and stable hydrogen production from alkaline FA solution but also had good electrocatalytic properties with respect to formaldehyde electrooxidation as a result of the synergistic effect of Pd NPs and rGO nanosheets.
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20
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Li D, Li Y, Wang X, Sun G, Cao J, Wang Y. Improved TEA Sensitivity and Selectivity of In2O3 Porous Nanospheres by Modification with Ag Nanoparticles. NANOMATERIALS 2022; 12:nano12091532. [PMID: 35564240 PMCID: PMC9105240 DOI: 10.3390/nano12091532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/17/2022] [Accepted: 04/27/2022] [Indexed: 11/16/2022]
Abstract
A highly sensitive and selective detection of volatile organic compounds (VOCs) by using gas sensors based on metal oxide semiconductor (MOS) has attracted increasing interest, but still remains a challenge in gas sensitivity and selectivity. In order to improve the sensitivity and selectivity of In2O3 to triethylamine (TEA), herein, a silver (Ag)-modification strategy is proposed. Ag nanoparticles with a size around 25–30 nm were modified on pre-synthesized In2O3 PNSs via a simple room-temperature chemical reduction method by using NaBH4 as a reductant. The results of gas sensing tests indicate that after functionalization with Ag, the gas sensing performance of In2O3 PNSs for VOCs, especially for TEA, was remarkably improved. At a lower optimal working temperature (OWT) of 300 °C (bare In2O3 sensor: 320 °C), the best Ag/In2O3-2 sensor (Ag/In2O3 PNSs with an optimized Ag content of 2.90 wt%) shows a sensitivity of 116.86/ppm to 1–50 ppm TEA, about 170 times higher than that of bare In2O3 sensor (0.69/ppm). Significantly, the Ag/In2O3-2 sensor can provide a response (Ra/Rg) as high as 5697 to 50 ppm TEA, which is superior to most previous TEA sensors. Besides lower OWT and higher sensitivity, the Ag/In2O3-2 sensor also shows a remarkably improved selectivity to TEA, whose selectivity coefficient (STEA/Sethanol) is as high as 5.30, about 3.3 times higher than that of bare In2O3 (1.59). The sensitization mechanism of Ag on In2O3 is discussed in detail.
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Affiliation(s)
- Dengke Li
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China; (J.C.); (Y.W.)
| | - Yanwei Li
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China; (J.C.); (Y.W.)
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
- Correspondence: (Y.L.); (G.S.); Tel.: +86-03913986952 (G.S.)
| | - Xiaohua Wang
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
| | - Guang Sun
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China; (J.C.); (Y.W.)
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
- Correspondence: (Y.L.); (G.S.); Tel.: +86-03913986952 (G.S.)
| | - Jianliang Cao
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China; (J.C.); (Y.W.)
- School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
| | - Yan Wang
- The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China; (J.C.); (Y.W.)
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21
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Acharyya S, Nag S, Guha PK. Ultra-selective tin oxide-based chemiresistive gas sensor employing signal transform and machine learning techniques. Anal Chim Acta 2022; 1217:339996. [DOI: 10.1016/j.aca.2022.339996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/24/2022] [Indexed: 11/15/2022]
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22
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Hu H, Liang H, Fan J, Guo L, Li H, de Rooij NF, Umar A, Algarni H, Wang Y, Zhou G. Assembling Hollow Cactus-Like ZnO Nanorods with Dipole-Modified Graphene Nanosheets for Practical Room-Temperature Formaldehyde Sensing. ACS APPLIED MATERIALS & INTERFACES 2022; 14:13186-13195. [PMID: 35275633 DOI: 10.1021/acsami.1c20680] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Formaldehyde (HCHO) sensing plays a critical role for indoor environment monitoring in smart home systems. Inspired by the unique hierarchical structure of cactus, we have prepared a ZnO/ANS-rGO composite for room-temperature (RT) HCHO sensing, through assembling hollow cactus-like ZnO nanorods with 5-aminonaphthalene-1-sulfonic acid (ANS)-modified graphene nanosheets in a facile and template-free manner. Interestingly, it was found that the ZnO morphology could be simply tuned from flower clusters to hollow cactus-like nanostructures, along with the increase of the reaction time during the assembly process. The ZnO/ANS-rGO-based sensors exhibited superior RT HCHO-sensing performance with an ultrahigh response (68%, 5 ppm), good repeatability, long-term stability, and an outstanding practical limit of detection (LOD: 0.25 ppm) toward HCHO, which is the lowest practical LOD reported so far. Furthermore, for the first time, a 30 m3 simulation test cabinet was adapted to evaluate the practical gas-sensing performance in an indoor environment. As a result, an instantaneous response of 5% to 0.4 ppm HCHO was successfully achieved in the simulation test. The corresponding sensing mechanism was interpreted from two aspects including high charge transport capability of ANS-rGO and the distinct gas adsorbability derived from nanostructures, respectively. The combination of a biomimetic hierarchical structure and supramolecular assembly provides a promising strategy to design HCHO-sensing materials with high practicability.
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Affiliation(s)
- Huiyun Hu
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
| | - Hongping Liang
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
| | - Jincheng Fan
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
| | - Lanpeng Guo
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
| | - Hao Li
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
| | - Nicolaas Frans de Rooij
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
| | - Ahmad Umar
- Promising Centre for Sensors and Electronic Devices, Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 11001, Kingdom of Saudi Arabia
| | - Hamed Algarni
- Department of Physics, King Khalid University, Abha 61421, Kingdom of Saudi Arabia
| | - Yao Wang
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
| | - Guofu Zhou
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
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23
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Wang J, Fatima-Ezzahra E, Dai J, Liu Y, Pei C, Li H, Wang Z, Huang X. Ligand-assisted deposition of ultra-small Au nanodots on Fe 2O 3/reduced graphene oxide for flexible gas sensors. NANOSCALE ADVANCES 2022; 4:1345-1350. [PMID: 36133674 PMCID: PMC9418930 DOI: 10.1039/d1na00734c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 01/17/2022] [Indexed: 06/15/2023]
Abstract
The development of flexible room-temperature gas sensors is important in environmental monitoring and protection. In this contribution, by using 1-octadecanethiol (ODT) as a surface ligand, Au nanodots (NDs) with ultra-small size of ∼1.7 nm were deposited on the surface of α-Fe2O3/reduced graphene oxide (rGO). The Au ND-ODT/α-Fe2O3/rGO composite was fabricated into flexible gas sensors, which could detect NO2 gas down to 200 ppb at room temperature. Compared with α-Fe2O3/rGO, Au ND-ODT/α-Fe2O3/rGO showed enhanced sensing performance because of the beneficial effects of Au NDs, including facilitating the adsorption of NO2 molecules and forming ohmic-like contact with rGO and α-Fe2O3. In addition, the sensing performance of the composite was also influenced by the surface ligands of the Au NDs. Ligands with less polar terminal groups were found to be beneficial to charge transfer in the sensing film. Moreover, Au ND-ODT/α-Fe2O3/rGO-based flexible sensors showed negligible performance deterioration under moderately bent conditions, suggesting their potential to be used in portable and wearable devices.
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Affiliation(s)
- Jian Wang
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
| | - Essalhi Fatima-Ezzahra
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
| | - Jie Dai
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
| | - Yanlei Liu
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
| | - Chengjie Pei
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
| | - Hai Li
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
| | - Zhiwei Wang
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University 127 West Youyi Road Xi'an 710072 China
| | - Xiao Huang
- Institute of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
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24
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Malepe L, Ndungu P, Ndinteh DT, Mamo MA. Nickel Oxide-Carbon Soot-Cellulose Acetate Nanocomposite for the Detection of Mesitylene Vapour: Investigating the Sensing Mechanism Using an LCR Meter Coupled to an FTIR Spectrometer. NANOMATERIALS 2022; 12:nano12050727. [PMID: 35269215 PMCID: PMC8911608 DOI: 10.3390/nano12050727] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/10/2021] [Accepted: 12/14/2021] [Indexed: 12/10/2022]
Abstract
Nanocomposite sensors were prepared using carbon soot (CNPs), nickel oxide nanoparticles (NiO-NPs), and cellulose acetate (CA), which was used to detect and study the sensing mechanism of mesitylene vapour at room temperature. Synthesised materials were characterised using high-resolution transmission electron microscopy (HR-TEM), powder x-ray diffraction (PXRD), Raman spectroscopy, and nitrogen sorption at 77 K. Various sensors were prepared using individual nanomaterials (NiO-NPs, CNPs, and CA), binary combinations of the nanomaterials (CNPs-NiO, CNPs-CA, and NiO-CA), and ternary composites (NiO-CNPs-CA). Among all of the prepared and tested sensors, the ternary nanocomposites (NiO-CNPs-CA) were found to be the most sensitive for the detection of mesitylene, with acceptable response recovery times. Fourier-transform infrared (FTIR) spectroscopy coupled with an LCR meter revealed that the mesitylene decomposes into carbon dioxide.
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Affiliation(s)
- Lesego Malepe
- Energy, Sensors and Multifunctional Nanomaterials Research Group, Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Johannesburg 2028, South Africa; (L.M.); (P.N.); (D.T.N.)
| | - Patrick Ndungu
- Energy, Sensors and Multifunctional Nanomaterials Research Group, Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Johannesburg 2028, South Africa; (L.M.); (P.N.); (D.T.N.)
| | - Derek Tantoh Ndinteh
- Energy, Sensors and Multifunctional Nanomaterials Research Group, Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Johannesburg 2028, South Africa; (L.M.); (P.N.); (D.T.N.)
| | - Messai Adenew Mamo
- Energy, Sensors and Multifunctional Nanomaterials Research Group, Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Johannesburg 2028, South Africa; (L.M.); (P.N.); (D.T.N.)
- DST-NRF Centre of Excellence in Strong Materials (CoE-SM), University of the Witwatersrand, Johannesburg 2001, South Africa
- Correspondence: ; Tel.: +27-11-559-9001
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25
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Zhou S, Wang H, Hu J, Lv T, Rong Q, Zhang Y, Zi B, Chen M, Zhang D, Wei J, Zhang J, Liu Q. Formaldehyde gas sensor with extremely high response employing cobalt-doped SnO 2 ultrafine nanoparticles. NANOSCALE ADVANCES 2022; 4:824-836. [PMID: 36131821 PMCID: PMC9419867 DOI: 10.1039/d1na00625h] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 12/23/2021] [Indexed: 05/02/2023]
Abstract
Formaldehyde is a common carcinogen in daily life and harmful to health. The detection of formaldehyde by a metal oxide semiconductor gas sensor is an important research direction. In this work, cobalt-doped SnO2 nanoparticles (Co-SnO2 NPs) with typical zero-dimensional structure were synthesized by a simple hydrothermal method. At the optimal temperature, the selectivity and response of 0.5% Co-doped SnO2 to formaldehyde are excellent (for 30 ppm formaldehyde, R a/R g = 163 437). Furthermore, the actual minimum detectable concentration of 0.5%Co-SnO2 NPs is as low as 40 ppb, which exceeds the requirements for formaldehyde detection in the World Health Organization (WHO) guidelines. The significant improvement of 0.5%Co-SnO2 NPs gas performance can be attributed to the following aspects: firstly, cobalt doping effectively improves the resistance of SnO2 NPs in the air; moreover, doping creates more defects and oxygen vacancies, which is conducive to the adsorption and desorption of gases. In addition, the crystal size of SnO2 NPs is vastly small and has unique physical and chemical properties of zero-dimensional materials. At the same time, compared with other gases tested, formaldehyde has a strong reducibility, so that it can be selectively detected at a lower temperature.
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Affiliation(s)
- Shiqiang Zhou
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology Center, Harbin Institute of Technology, Shenzhen University Town Shenzhen 518055 China
| | - Huapeng Wang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
| | - Jicu Hu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
| | - Tianping Lv
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
| | - Qian Rong
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
| | - Yumin Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
| | - Baoye Zi
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
| | - Mingpeng Chen
- Institute of Applied Physics and Materials Engineering, University of Macau Macau SAR China
| | - Dongming Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
| | - Jun Wei
- Shenzhen Key Laboratory of Flexible Printed Electronics Technology Center, Harbin Institute of Technology, Shenzhen University Town Shenzhen 518055 China
| | - Jin Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
| | - Qingju Liu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University Kunming 650091 P. R. China
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26
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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]
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27
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Deng Q, Huang Y, Chen B, Bo M, Feng Y. Conductive V2C MXene and paralelectric SrTiO3 containing polymer composites with high dielectric constant. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127763] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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28
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Dong X, Han Q, Kang Y, Li H, Huang X, Fang Z, Yuan H, Elzatahry AA, Chi Z, Wu G, Xie W. Rational construction and triethylamine sensing performance of foam shaped α-MoO3@SnS2 nanosheets. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.06.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Tian C, Wang Z, Li Y, Liu L. Influence of calcination temperature on the gas-sensing performance of 3D porous SnO 2 to formaldehyde. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1979408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Chunxia Tian
- College of Physics, Jilin University, Changchun, PR China
| | - Zhijun Wang
- College of Physics, Jilin University, Changchun, PR China
| | - Yu Li
- College of Physics, Jilin University, Changchun, PR China
| | - Li Liu
- College of Physics, Jilin University, Changchun, PR China
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30
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Xie J, Liu X, Jing S, Pang C, Liu Q, Zhang J. Chemical and Electronic Modulation via Atomic Layer Deposition of NiO on Porous In 2O 3 Films to Boost NO 2 Detection. ACS APPLIED MATERIALS & INTERFACES 2021; 13:39621-39632. [PMID: 34383462 DOI: 10.1021/acsami.1c11262] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
To achieve high sensitivity under low-temperature operation is currently a challenge for metal oxide semiconductor gas sensors. In this work, a unique NiO-functionalized macroporous In2O3 thin film is designed by atomic layer deposition (ALD), which demonstrates great potential in electronic sensors for detecting NO2 at low temperature. This strategy allows for efficient engineering of the oxygen vacancy concentration and the formation of p-n heterojunctions in the hybrid In2O3/NiO thin films, which has been found to greatly impact the surface chemical and electrical properties of the sensing films. The sensor based on the optimized In2O3/NiO films exhibits a very high response of 532.2 to 10 ppm NO2, which is 26 times higher than that of the In2O3, at a relatively low operating temperature of 145 °C. In addition, an ultralow detection limit of ca. 6.9 ppb has been obtained, which surpasses most reports based on metal oxide sensors. Mechanistic investigations disclose that the improved sensor properties are resultant from the paramount surface active sites and high carrier concentration enabled by the oxygen vacancies, while excessive NiO ALD leads to a decreased sensor response due to the formed p-n heterojunctions.
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Affiliation(s)
- Jiayue Xie
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China
| | - Xianghong Liu
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China
| | - Shuliang Jing
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China
| | - Chao Pang
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China
| | - Qingshan Liu
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China
| | - Jun Zhang
- College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China
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31
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One-Dimensional Nanomaterials in Resistive Gas Sensor: From Material Design to Application. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9080198] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
With a series of widespread applications, resistive gas sensors are considered to be promising candidates for gas detection, benefiting from their small size, ease-of-fabrication, low power consumption and outstanding maintenance properties. One-dimensional (1-D) nanomaterials, which have large specific surface areas, abundant exposed active sites and high length-to-diameter ratios, enable fast charge transfers and gas-sensitive reactions. They can also significantly enhance the sensitivity and response speed of resistive gas sensors. The features and sensing mechanism of current resistive gas sensors and the potential advantages of 1-D nanomaterials in resistive gas sensors are firstly reviewed. This review systematically summarizes the design and optimization strategies of 1-D nanomaterials for high-performance resistive gas sensors, including doping, heterostructures and composites. Based on the monitoring requirements of various characteristic gases, the available applications of this type of gas sensors are also classified and reviewed in the three categories of environment, safety and health. The direction and priorities for the future development of resistive gas sensors are laid out.
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32
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Strategies for Improving the Sensing Performance of Semiconductor Gas Sensors for High-Performance Formaldehyde Detection: A Review. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9070179] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Formaldehyde is a poisonous and harmful gas, which is ubiquitous in our daily life. Long-term exposure to formaldehyde harms human body functions; therefore, it is urgent to fabricate sensors for the real-time monitoring of formaldehyde concentrations. Metal oxide semiconductor (MOS) gas sensors is favored by researchers as a result of their low cost, simple operation and portability. In this paper, the mechanism of formaldehyde detection by gas sensors is introduced, and then the ways of ameliorating the response of gas sensors for formaldehyde detection in recent years are summarized. These methods include the control of the microstructure and morphology of sensing materials, the doping modification of matrix materials, the development of new semiconductor sensing materials, the outfield control strategy and the construction of the filter membrane. These five methods will provide a good prerequisite for the preparation of better performing formaldehyde gas sensors.
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33
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Dasari S, Nagaraju P, Yelsani V, Tirumala S, M V RR. Nanostructured Indium Oxide Thin Films as a Room Temperature Toluene Sensor. ACS OMEGA 2021; 6:17442-17454. [PMID: 34278130 PMCID: PMC8280699 DOI: 10.1021/acsomega.1c01831] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 06/23/2021] [Indexed: 06/13/2023]
Abstract
Toluene gas is the most toxic and affects the respiratory system of humans, and thereby, its detection at lower levels is an important task. Herein, we report a room temperature-operatable indium oxide-based chemiresistive gas sensor, which detects 50 ppm toluene vapors. Nanocrystalline indium oxide (In2O3) films were sprayed on a pre-cleaned glass substrate using a cost-effective spray pyrolysis method at different substrate temperatures in the range of 350-500 °C. The X-ray diffraction studies confirmed that the sprayed thin films, which were deposited at different substrate temperatures, exhibit a cubic structure. The preferred orientation was aligned along the (222) orientation. Average crystallite size calculation based on the Scherrer formula indicates that the crystallite size increases with the enhancement of substrate temperature. FESEM analysis showed that the indium oxide thin films possess uniform grain distribution, which persists over the entire substrate. As the substrate temperature is increased, a partial agglomeration in the film morphology was observed. The deposited film's nanostructured nature was confirmed by transmission electron microscopy, and the polycrystalline nature was confirmed from the selected area electron diffraction pattern. Root mean square roughness of the samples was determined from the atomic force microscopy studies. From the Raman spectra, characteristic vibrational modes appeared at 558.61, 802.85, and 1097.18 cm-1 in all the samples, which confirms the cubic structure of indium oxide thin films. Photoluminescence emission spectra have been recorded with an excitation wavelength of 280 nm. The optical band gap was measured using the Tauc plot. The band gap was found to decrease with an increase in the substrate temperature. The gas-sensing performance of indium oxide films sprayed at various substrate temperatures has demonstrated a better response toward 50 ppm toluene gas at room temperature with good stability, and the response and recovery times were determined using a transient response curve.
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Affiliation(s)
- Sunil
Gavaskar Dasari
- Thin
Films & Nanomaterials Research Laboratory, Department of Physics, Osmania University, Hyderabad, Telangana State 500 007, India
| | - Pothukanuri Nagaraju
- Nanosensor
Research Laboratory, Department of Physics, CMR Technical Campus, Kandlaokoya, Hyderabad, Telangana State 501 401, India
| | - Vijayakumar Yelsani
- Department
of Physics, Anurag University, Hyderabad, Telangana State 500 088, India
| | - Sreekanth Tirumala
- Department
of Physics, JNTUH College of Engineering
Jagtial, Nachupally (Kondagattu), Jagtial Dist, Telangana State 505 501, India
| | - Ramana Reddy M V
- Thin
Films & Nanomaterials Research Laboratory, Department of Physics, Osmania University, Hyderabad, Telangana State 500 007, India
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34
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Liu J, Zhang L, Cheng B, Fan J, Yu J. A high-response formaldehyde sensor based on fibrous Ag-ZnO/In 2O 3 with multi-level heterojunctions. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125352. [PMID: 33930945 DOI: 10.1016/j.jhazmat.2021.125352] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/19/2021] [Accepted: 02/05/2021] [Indexed: 05/14/2023]
Abstract
Timely detection of formaldehyde is pivotal because formaldehyde is slowly released from the indoor decorative materials, jeopardizing our healthy. Herein, a high-response formaldehyde gas sensor based on Ag-ZnO/In2O3 nanofibers was successfully fabricated. Compared with all the control samples, the hybrid exhibits superior sensitivity (0.65 ppm-1), excellent selectivity (≥ 12.5) and durable stability (the deviation value ≤ 3%). Particularly, an ultra-high response value of about 186 towards 100 ppm of formaldehyde at 260 °C was achieved, heading the list of outstanding candidates. Additionally, the limit of detection is as low as 9 ppb. The enhanced gas sensing properties can be mainly attributed to multi-level heterojunctions (n-n heterojunction and Ohmic junction) and the "spill-over" effect of Ag, ultimately increasing the adsorption of gas molecules on the surface of sensing material. This work verifies that proper design of multi-level heterojunctions significantly upgrade the sensing performance.
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Affiliation(s)
- Jingjing Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, PR China
| | - Liuyang Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China.
| | - Bei Cheng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China
| | - Jiajie Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China
| | - Jiaguo Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, PR China.
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35
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Wang Y, Wang X, Qi B, Cheng J, Wang X, Shang Y, Jia J. Design of SnO
2
/ZnO@ZIF‐8 Hydrophobic Nanofibers for Improved H
2
S Gas Sensing. ChemistrySelect 2021. [DOI: 10.1002/slct.202100795] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Yumeng Wang
- Key Laboratory of Material Physics of Ministry of Education School of Physics and Microelectronics Zhengzhou China
| | - Xinchang Wang
- Key Laboratory of Material Physics of Ministry of Education School of Physics and Microelectronics Zhengzhou China
| | - Beiying Qi
- Key Laboratory of Material Physics of Ministry of Education School of Physics and Microelectronics Zhengzhou China
| | - Jipeng Cheng
- State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Xinyue Wang
- Key Laboratory of Material Physics of Ministry of Education School of Physics and Microelectronics Zhengzhou China
| | - Yuanyuan Shang
- Key Laboratory of Material Physics of Ministry of Education School of Physics and Microelectronics Zhengzhou China
| | - Jianfeng Jia
- Key Laboratory of Material Physics of Ministry of Education School of Physics and Microelectronics Zhengzhou China
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36
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Structural, Magnetic and Gas Sensing Activity of Pure and Cr Doped In2O3 Thin Films Grown by Pulsed Laser Deposition. COATINGS 2021. [DOI: 10.3390/coatings11050588] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Pure In2O3 and 6% Cr-doped In2O3 thin films were prepared on a silicon (Si) substrate by pulsed laser deposition technique. The obtained In2O3/In2O3:Cr thin films structural, morphological, optical, magnetic and gas sensing properties were briefly investigated. The X-ray diffraction results confirmed that the grown thin films are in single-phase cubic bixbyte structure with space group Ia-3. The SEM analysis showed the formation of agglomerated spherical shape morphology with the decreased average grain size for Cr doped In2O3 thin film compared to pure In2O3 film. It is observed that the Cr doped In2O3 thin film shows the lower band gap energy and that the corresponding transmittance is around 80%. The X-ray photoelectron spectroscopy measurements revealed that the presence of oxygen vacancy in the doped In2O3 film. These oxygen defects could play a significant role to enhance the sensing performance towards chemical species. In the magnetic hysteresis loop, it is clear that the prepared films confirm the ferromagnetic behaviour and the maximum saturation value of 39 emu/cc for Cr doped In2O3 film. NH3 gas sensing studies was also carried out at room temperature for both pure and Cr doped In2O3 films, and the obtained higher sensitivity is 182% for Cr doped In2O3, which is about nine times higher than for the pure In2O3 film due to the presence of defects on the doped film surface.
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37
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van den Broek J, Weber IC, Güntner AT, Pratsinis SE. Highly selective gas sensing enabled by filters. MATERIALS HORIZONS 2021; 8:661-684. [PMID: 34821311 DOI: 10.1039/d0mh01453b] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Portable and inexpensive gas sensors are essential for the next generation of non-invasive medical diagnostics, smart air quality monitoring & control, human search & rescue and food quality assessment to name a few of their immediate applications. Therein, analyte selectivity in complex gas mixtures like breath or indoor air remains the major challenge. Filters are an effective and versatile, though often unrecognized, route to overcome selectivity issues by exploiting additional properties of target analytes (e.g., molecular size and surface affinity) besides reactivity with the sensing material. This review provides a tutorial for the material engineering of sorption, size-selective and catalytic filters. Of specific interest are high surface area sorbents (e.g., activated carbon, silica gels and porous polymers) with tunable properties, microporous materials (e.g., zeolites and metal-organic frameworks) and heterogeneous catalysts, respectively. Emphasis is placed on material design for targeted gas separation, portable device integration and performance. Finally, research frontiers and opportunities for low-cost gas sensing systems in emerging applications are highlighted.
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Affiliation(s)
- Jan van den Broek
- Particle Technology Laboratory, Institute of Energy & Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland.
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38
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Han C, Li X, Liu Y, Li X, Shao C, Ri J, Ma J, Liu Y. Construction of In 2O 3/ZnO yolk-shell nanofibers for room-temperature NO 2 detection under UV illumination. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:124093. [PMID: 33265068 DOI: 10.1016/j.jhazmat.2020.124093] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/23/2020] [Accepted: 09/23/2020] [Indexed: 06/12/2023]
Abstract
Room-temperature gas sensors have emerged as effective platforms for sensing explosive or toxic gases in ambient environment. However, room-temperature gas sensor usually suffers from extremely poor sensitivity and sluggish response/recovery characteristics due to the low reacting activity at low temperature. Herein, we present a room-temperature NO2 sensor with greatly enhanced sensitivity and rapid response/recovery speed under ultraviolet (UV) illumination. The sensor based on In2O3/ZnO yolk-shell nanofibers exhibits remarkable sensitivity (Rg/Ra = 6.0) to 1 ppm NO2 and rapid response/recovery time (≤36, 68 s) under UV illumination, obviously better than negligible sensing performance and inefficient response/recovery properties in dark condition. Such excellent gas sensing properties of the In2O3/ZnO yolk-shell nanofibers were not only attributed to the improved photo-generated charge separation efficiency derived from the effect of heterojunction, but also related to the enhanced receptor function towards NO2 endowed by increased reactive sites and gas adsorption. These proposed strategies will provide a reference for developing high-performance room-temperature gas sensors.
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Affiliation(s)
- Chaohan Han
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
| | - Xiaowei Li
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China.
| | - Yu Liu
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
| | - Xinghua Li
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
| | - Changlu Shao
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China.
| | - Jisong Ri
- Faculty of Material Science and Engineering, Kimchaek University of Technology, Pyongyang 950003, Democratic People's Republic of Korea
| | - Jiangang Ma
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
| | - Yichun Liu
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China
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39
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Shellaiah M, Sun KW. Inorganic-Diverse Nanostructured Materials for Volatile Organic Compound Sensing. SENSORS (BASEL, SWITZERLAND) 2021; 21:633. [PMID: 33477501 PMCID: PMC7831086 DOI: 10.3390/s21020633] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/05/2021] [Accepted: 01/14/2021] [Indexed: 11/17/2022]
Abstract
Environmental pollution related to volatile organic compounds (VOCs) has become a global issue which attracts intensive work towards their controlling and monitoring. To this direction various regulations and research towards VOCs detection have been laid down and conducted by many countries. Distinct devices are proposed to monitor the VOCs pollution. Among them, chemiresistor devices comprised of inorganic-semiconducting materials with diverse nanostructures are most attractive because they are cost-effective and eco-friendly. These diverse nanostructured materials-based devices are usually made up of nanoparticles, nanowires/rods, nanocrystals, nanotubes, nanocages, nanocubes, nanocomposites, etc. They can be employed in monitoring the VOCs present in the reliable sources. This review outlines the device-based VOC detection using diverse semiconducting-nanostructured materials and covers more than 340 references that have been published since 2016.
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Affiliation(s)
| | - Kien Wen Sun
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan;
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40
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Yin Y, Liu J, Wu Z, Zhang T, Li Z. ZIF-8 calcination derived Cu 2O–ZnO* material for enhanced visible-light photocatalytic performance. NEW J CHEM 2021. [DOI: 10.1039/d0nj05481j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism of TC degradation over Cu2O–ZnO* rich in oxygen vacancies.
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Affiliation(s)
- Yilin Yin
- School of Chemistry
- Beijing University of Chemical Technology
- Chaoyang
- China
| | - Jingchao Liu
- School of Chemistry
- Beijing University of Chemical Technology
- Chaoyang
- China
| | - Zengnan Wu
- School of Chemistry
- Beijing University of Chemical Technology
- Chaoyang
- China
| | - Ting Zhang
- School of Chemistry
- Beijing University of Chemical Technology
- Chaoyang
- China
| | - Zenghe Li
- School of Chemistry
- Beijing University of Chemical Technology
- Chaoyang
- China
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41
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Lv H, Liu Z, Chen J, Ikram M, Bai X, Wang J, Sun B, Kan K, Shi K. Enhanced room-temperature NO 2 sensing properties of biomorphic hierarchical mixed phase WO 3. NANOSCALE 2020; 12:24285-24295. [PMID: 33295930 DOI: 10.1039/d0nr07093a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
WO3 with a mixed phase (m-WO3 and h-WO3) was synthesized by facile hydrothermal and annealing methods using biomass carbon (Hemp stems) as a sacrificial template. The biomorphic hierarchical structure effectively enhanced the dispersion of WO3 microspheres, which increased the contact area for the target gas molecule. The control of the mixed phase compositions was achieved by space confinement of biomass carbon and heat treatments. The synergistic effect of the mixed phase increased the mobility of carriers and promoted the separation and transport of electrons and holes. Thus, it improved the adsorption-diffusion capacity of NO2 molecules and enhanced the sensor performance at lower operating temperature effectively. The B-WO3-04 (450 °C, 4 h) exhibited an ultra-high response (Ra/Rg = 71.07) towards 100 ppm NO2 gas with excellent repeatability and appreciable long-term stability at room temperature. The significant improvement of B-WO3-04 gas sensing performance was mainly due to its unique hierarchical structure and the optimal proportion of the mixed phase composition.
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Affiliation(s)
- He Lv
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin, 150080, P. R. China.
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42
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Liang Q, Qu X, Bai N, Chen H, Zou X, Li GD. Alkali metal-incorporated spinel oxide nanofibers enable high performance detection of formaldehyde at ppb level. JOURNAL OF HAZARDOUS MATERIALS 2020; 400:123301. [PMID: 32947706 DOI: 10.1016/j.jhazmat.2020.123301] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/06/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
Sensing material with high sensitivity, excellent selectivity and ultra-low detection limit is crucial for monitoring formaldehyde, which is a kind of hazardous gas to human health at very low concentration. Some one-dimensional semiconductor metal oxides show acceptable responses towards formaldehyde. However, the detection limit and selectivity of these sensors are still not satisfied, especially at ppb level. Herein, alkali metals (K, Na) doped CdGa2O4 nanofibers with excellent formaldehyde sensing performance are prepared by an electrospinning method. These nanofibers have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), electron paramagnetic resonance spectroscopy (EPR), elemental mapping and other techniques. As a result, the sensor based on 7.5 at.% K doped CdGa2O4 gives remarkably improved formaldehyde sensing properties compared with that of pristine CdGa2O4. The greatly increased sensitivity and selectivity should be attributed to the increased chemisorbed oxygen and the enhanced basicity caused by the additional alkali metal, respectively. All in all, the 7.5 at.% K doped CdGa2O4 is a good candidate for the rapid detecting formaldehyde at ppb level.
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Affiliation(s)
- Qihua Liang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Electron Microscopy Center, Jilin University, Changchun 130012, PR China
| | - Xuejian Qu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Electron Microscopy Center, Jilin University, Changchun 130012, PR China
| | - Ni Bai
- School of Mechanical and Metallurgical Engineering, Jiangsu University of Science and Technology, Zhangjiagang 215600, PR China
| | - Hui Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Electron Microscopy Center, Jilin University, Changchun 130012, PR China
| | - Xiaoxin Zou
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Electron Microscopy Center, Jilin University, Changchun 130012, PR China
| | - Guo-Dong Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Electron Microscopy Center, Jilin University, Changchun 130012, PR China.
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Gold nanoprism/Tollens’ reagent complex as plasmonic sensor in headspace single-drop microextraction for colorimetric detection of formaldehyde in food samples using smartphone readout. Talanta 2020; 220:121388. [DOI: 10.1016/j.talanta.2020.121388] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 07/05/2020] [Accepted: 07/06/2020] [Indexed: 12/15/2022]
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van den Broek J, Klein Cerrejon D, Pratsinis SE, Güntner AT. Selective formaldehyde detection at ppb in indoor air with a portable sensor. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:123052. [PMID: 32937713 DOI: 10.1016/j.jhazmat.2020.123052] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 05/04/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
Formaldehyde is a carcinogenic indoor air pollutant emitted from wood-based furniture, building materials, paints and textiles. Yet, no low-cost sensor exists for on-site monitoring to fulfill stringent current and upcoming (e.g., 8 parts-per-billion by volume, ppb, in France by 2023) exposure guidelines. Here, we present an inexpensive and handheld formaldehyde detector with proven performance in real indoor air. Selectivity is achieved by a compact packed bed column of nanoporous polymer sorbent that separates formaldehyde from interferants present in ambient air. Downstream, a highly sensitive nanoparticle-based chemoresistive Pd-doped SnO2 sensor detects formaldehyde in the relevant concentration range down to 5 ppb within 2 min. As a proof-of-concept, we measured formaldehyde in indoor air and from different wood product emissions, in excellent agreement (R2 > 0.98) with high-resolution proton-transfer-reaction time-of-flight mass spectrometry. This detector is simple-in-use and readily applicable for on-site formaldehyde exposure monitoring at home or work. It is promising for internet-of-things (IOT) sensing networks or even wearables for personal exposure assessment.
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Affiliation(s)
- Jan van den Broek
- Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland
| | - David Klein Cerrejon
- Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland
| | - Sotiris E Pratsinis
- Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland
| | - Andreas T Güntner
- Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland.
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Zhou S, Lu Q, Chen M, Li B, Wei H, Zi B, Zeng J, Zhang Y, Zhang J, Zhu Z, Liu Q. Platinum-Supported Cerium-Doped Indium Oxide for Highly Sensitive Triethylamine Gas Sensing with Good Antihumidity. ACS APPLIED MATERIALS & INTERFACES 2020; 12:42962-42970. [PMID: 32875790 DOI: 10.1021/acsami.0c12363] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Triethylamine is extremely harmful to human health, and chronic inhalation can lead to respiratory and hematological diseases and eye lesions. Hence, it is essential to develop a triethylamine gas-sensing technology with high response, selectivity, and stability for use in healthcare and environmental monitoring. In this work, a simple and low-cost sensor based on the Pt- and Ce-modified In2O3 hollow structure to selectively detect triethylamine is developed. The experimental results reveal that the sensor based on 1% Pt/Ce12In exhibits excellent triethylamine-sensing performance, including its insusceptibility to water, reduced operating temperature, enhanced response, and superior long-term stability. This work suggests that the enhancement of sensing performance toward triethylamine can be attributed to the high relative contents of OV and OC, large specific surface area, catalytic effect, the electronic sensitization of Pt, and the reversible redox cycle properties of Ce. This sensor represents a unique and highly sensitive means to detect triethylamine, which shows great promise for potential applications in food safety inspection and environmental monitoring.
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Affiliation(s)
- Shiqiang Zhou
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Qingjie Lu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Mingpeng Chen
- Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR 999078, P. R. China
| | - Bo Li
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Haitang Wei
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Baoye Zi
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Jiyang Zeng
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Yumin Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Jin Zhang
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Zhongqi Zhu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Qingju Liu
- Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
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Wu L, Xu J, Li Q, Fan Z, Mei F, Zhou Y, Yan J, Chen Y. Enhanced performance of In 2O 3 nanowire field effect transistors with controllable surface functionalization of Ag nanoparticles. NANOTECHNOLOGY 2020; 31:355703. [PMID: 32357357 DOI: 10.1088/1361-6528/ab8f4a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Indium oxide (In2O3) nanowire field effect transistors (FETs) have great potential in electronic and sensor applications owing to their suitable band width and high electron mobility. However, the In2O3 nanowire FETs reported previously were operated in a depletion-mode, not suitable to the integrated circuits result of the high-power consumption. Therefore, tuning the electrical properties of In2O3 nanowire FETs into enhancement-mode is critical for the successful application in the fields of high-performance electronics, optoelectronics and detectors. In the work, a simple but effective strategy was carried out by preparing Ag nanoparticle functionalized In2O3 NWs to regulate the threshold voltage (Vth) of In2O3 NW FETs, successfully achieving enhanced-mode devices. The threshold voltage can be regulated from -6.9 V to +7 V by controlling Ag density via deposition time. In addition, the devices exhibited high performance: huge Ion/Ioff ratio > 108, large maximum saturation current ≈ 800 mA and excellent carrier mobility ≈ 129 cm2 Vċs-1. The enhanced performance is attributed to the surface passivation by Ag nanoparticles to reduce the density of traps and the charge transfer between traps and the nanowires to regulate the Vth. The result indicates the application of metal nanoparticles significantly improve oxide NW for low-power FETs.
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Affiliation(s)
- Liming Wu
- Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System, Hubei University of Technology, Wuhan 430068, People's Republic of China. School of Electrical & Electronic Engineering, Hubei University of Technology, Wuhan 430068, People's Republic of China
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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.
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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
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Jun L, Chen Q, Fu W, Yang Y, Zhu W, Zhang J. Electrospun Yb-Doped In 2O 3 Nanofiber Field-Effect Transistors for Highly Sensitive Ethanol Sensors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:38425-38434. [PMID: 32786210 DOI: 10.1021/acsami.0c12259] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Enhancing the reliability and sensitivity of gas sensors based on FETs has been of extensive concern for their practical application. However, few reports are available on nanofiber FET gas sensors fabricated by the electrospinning process. In this work, ethanol gas sensors based on Yb-doped In2O3 (InYbO) nanofiber FETs are fabricated by a simple and fast electrospinning method. The optimized In2O3 nanofiber FETs with a doping concentration of 4 mol % show a better electrical performance, including a high mobility of 6.67 cm2/Vs, an acceptable threshold voltage of 3.27 V, and a suitable on/off current ratio of 107, especially the enhanced bias-stress stability. When employed in ethanol gas sensors, the gas sensors exhibit enhanced stability and improved sensitivity with a high response of 40-10 ppm, which is remarkably higher than that of previously reported ethanol gas sensors. Moreover, the InYbO nanofiber FET sensors also demonstrate a low limit of detection of 1 ppm and improved sensing performance ranging from sensitivity to the ability of selectivity. This work opens up a new prospect to achieve highly sensitive, selective, and reliable ethanol gas sensors using electrospun Yb-In2O3 nanofiber FETs with improved stability.
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Affiliation(s)
- Li Jun
- School of Material Science and Engineering, Shanghai University, Jiading, Shanghai 201800, People's Republic of China
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, People's Republic of China
| | - Qi Chen
- School of Material Science and Engineering, Shanghai University, Jiading, Shanghai 201800, People's Republic of China
| | - Wenhui Fu
- School of Material Science and Engineering, Shanghai University, Jiading, Shanghai 201800, People's Republic of China
| | - Yaohua Yang
- School of Material Science and Engineering, Shanghai University, Jiading, Shanghai 201800, People's Republic of China
| | - Wenqing Zhu
- School of Material Science and Engineering, Shanghai University, Jiading, Shanghai 201800, People's Republic of China
| | - Jianhua Zhang
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, People's Republic of China
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Zhang K, Qin S, Tang P, Feng Y, Li D. Ultra-sensitive ethanol gas sensors based on nanosheet-assembled hierarchical ZnO-In 2O 3 heterostructures. JOURNAL OF HAZARDOUS MATERIALS 2020; 391:122191. [PMID: 32044631 DOI: 10.1016/j.jhazmat.2020.122191] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 05/21/2023]
Abstract
Developing efficient sensing materials with super sensitivity and selectivity is imperative to fabricate high-performance gas sensors for satisfying future needs. Herein, we report the preparation of ultrathin nanosheet-assembled 3D hierarchical ZnO/In2O3 heterostructures for the sensitive and selective detection of ethanol by sintering the 3D hierarchical Zn/In glycerolate precursors consisting of ultrathin nanosheets synthesized through a facile solvothermal method. The obtained ZnO/In2O3 heterostructures were carefully characterized by XRD, SEM, HRTEM, BET and XPS. The results showed that the 20%ZnO/In2O3 heterostructure is built up by many ultrathin nanosheets composed of intimately connected ZnO and In2O3 nanoparticles and have a specific surface area as high as 137.1 m2 g-1. Because of the unique hierarchical structure, abundant mesoporous and formation of ZnO-In2O3 n-n heterojunctions, the 20%ZnO/In2O3 heterostructure based sensor was ultra-sensitive to ethanol gas at 240 °C and exhibited a response as high as 170 toward 50 ppm of ethanol, which is about 3.3 times higher than that of pure In2O3 based sensor. Moreover, the sensor based on 20%ZnO/In2O3 heterostructure has virtues of excellent selectivity, good long-term stability and moderate response and recovery speed (35/46 s) toward ethanol. Therefore, the ultrathin nanosheet-assembled 3D hierarchical heterostructures are promising materials for fabricating high-performance gas sensors.
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Affiliation(s)
- Kun Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Shuaiwei Qin
- State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Pinggui Tang
- State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029, PR China.
| | - Yongjun Feng
- State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Dianqing Li
- State Key Laboratory of Chemical Resource Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029, PR China.
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Zhang D, Chen M, Zou H, Zhang Y, Hu J, Wang H, Zi B, Zhang J, Zhu Z, Duan L, Liu Q. Microwave-assisted synthesis of porous and hollow α-Fe 2O 3/LaFeO 3 nanostructures for acetone gas sensing as well as photocatalytic degradation of methylene blue. NANOTECHNOLOGY 2020; 31:215601. [PMID: 32032011 DOI: 10.1088/1361-6528/ab73b5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
To address the urgent issues of hazardous gas detection and the prevention of environmental pollution, various functional materials for gas sensing and catalytic reduction have been studied. Specifically, the p-type perovskite LaFeO3 has been studied widely because of its promising physicochemical properties. However, there remains several problems to develop a controllable synthesis of LaFeO3-based p-n heterojunctions. In this work, α-Fe2O3 was further compounded with LaFeO3 to form a porous and hollow α-Fe2O3/LaFeO3 heterojunction to improve its gas-sensing performance and photocatalytic efficiency via a microwave-assisted hydrothermal method. While evaluated as sensors of acetone gas, the optimized sample exhibits excellent performance, including a high response (48.3), excellent selectivity, good reversibility, fast response, and recovery ability. Furthermore, it is an efficient catalyst for the degradation of methylene blue. This can be attributed to the enhancement effect of its larger specific surface area, fast diffusion, enhanced surface activities, and p-n heterojunction. Additionally, this work provides a rapid and rational synthesis strategy to produce metal oxides with both enhanced gas-sensing performance and improved photocatalytic properties.
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Affiliation(s)
- Dongming Zhang
- School of Materials Science and Engineering, Yunnan Key Laboratory for Micro/nano Materials & Technology, Yunnan University, Kunming 650091, People's Republic of China
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