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Zhang Z, Yi C, Chen T, Zhao Y, Zhang Y, Jin H. Solid-State Gas Sensors with Ni-Based Sensing Materials for Highly Selective Detecting NOx. SENSORS (BASEL, SWITZERLAND) 2024; 24:7378. [PMID: 39599154 PMCID: PMC11598561 DOI: 10.3390/s24227378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2024] [Revised: 11/11/2024] [Accepted: 11/18/2024] [Indexed: 11/29/2024]
Abstract
Precise monitoring of NOx concentrations in nitric oxide delivery systems is crucial to ensure the safety and well-being of patients undergoing inhaled nitric oxide (iNO) therapy for pulmonary arterial hypertension. Currently, NOx sensing in commercialized iNO instruments predominantly relies on chemiluminescence sensors, which not only drives up costs but also limits their portability. Herein, we developed solid-state gas sensors utilizing Ni-based sensing materials for effectively tracking the levels of NO and NO2 in the NO delivery system. These sensors comprised of NiO-SE or (NiFe2O4 + 30 wt.% Fe2O3)-SE vs. Mn-based RE demonstrated high selectivity toward 100 ppm NO under the interference of 10 ppm NO2 or 3 ppm NO2 under the interference of 100 ppm NO, respectively. Meanwhile, excellent stability, repeatability, and humidity resistance were also verified for the proposed sensors. Sensing mechanisms were thoroughly investigated through assessments of adsorption capabilities and electrochemical reactivity. It turns out that the superior electrochemical reactivity of NiO toward NO, alongside the NO2 favorable adsorption characteristics of (NiFe2O4 + 30 wt.% Fe2O3), is the primary reason for the high selectivity to NOx. These findings indicate a bright future for the application of these NOx sensors in innovative iNO treatment technologies.
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Affiliation(s)
- Zhenghu Zhang
- Institute of Micro-Nano Science and Technology & National Key Laboratory of Advanced Micro and Nano Manufacture Technology, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; (Z.Z.); (C.Y.)
| | - Chenghan Yi
- Institute of Micro-Nano Science and Technology & National Key Laboratory of Advanced Micro and Nano Manufacture Technology, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; (Z.Z.); (C.Y.)
| | - Tao Chen
- Nanjing Novlead Biotechnology Co., Ltd., Nanjing 211800, China; (T.C.); (Y.Z.); (Y.Z.)
| | - Yangbo Zhao
- Nanjing Novlead Biotechnology Co., Ltd., Nanjing 211800, China; (T.C.); (Y.Z.); (Y.Z.)
| | - Yanyu Zhang
- Nanjing Novlead Biotechnology Co., Ltd., Nanjing 211800, China; (T.C.); (Y.Z.); (Y.Z.)
| | - Han Jin
- Institute of Micro-Nano Science and Technology & National Key Laboratory of Advanced Micro and Nano Manufacture Technology, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; (Z.Z.); (C.Y.)
- Medical School, Henan University, Kaifeng 475004, China
- National Engineering Research Center for Nanotechnology, Shanghai 200241, China
- Wuzhen Laboratory, Tongxiang 314500, China
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Gao ZW, Li H, Li PH, Li YY, Quan JQ, Ma N, Chen SH, Huang XJ, Song ZY, Yang M. In-situ precipitation zero-valent Co on Co 2VO 4 to activate oxygen vacancies and enhance bimetallic ions redox for efficient detection toward Hg(II). Anal Chim Acta 2024; 1306:342612. [PMID: 38692793 DOI: 10.1016/j.aca.2024.342612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/29/2024] [Accepted: 04/13/2024] [Indexed: 05/03/2024]
Abstract
Despite the widespread utilization of variable valence metals in electrochemistry, it is still a formidable challenge to enhance the valence conversion efficiency to achieve excellent catalytic activity without introducing heterophase elements. Herein, the in-situ precipitation of Co particles on Co2VO4 not only enhanced the concentration of oxygen vacancies (Ov) but also generated a greater number of low-valence metals, thereby enabling efficient reduction towards Hg(II). The electroanalysis results demonstrate that the sensitivity of Co/Co2VO4 towards Hg(II) was measured at an impressive value of 1987.74 μA μM-1 cm-2, significantly surpassing previously reported results. Further research reveals that Ov acted as the main adsorption site to capture Hg(II). The redox reactions of Co2+/Co3+ and V3+/V4+ played a synergistic role in the reduction of Hg(II), accompanied by the continuous supply of electrons from zero-valent Co to expedite the valence cycle. The Co/Co2VO4/GCE presented remarkable selectivity towards Hg(II), with excellent stability, reproducibility, and anti-interference capability. The electrode also exhibited minimal sensitivity fluctuations towards Hg(II) in real water samples, underscoring its practicality for environmental applications. This study elucidates the mechanism underlying the surface redox reaction of metal oxides facilitated by zero-valent metals, providing us with new strategies for further design of efficient and practical sensors.
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Affiliation(s)
- Zhi-Wei Gao
- Institute of Environment, Hefei Comprehensive National Science Center, Hefei, 230088, China; Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Hao Li
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; Wan Jiang New Industry Technology Development Center, Tongling, 244000, China
| | - Pei-Hua Li
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China
| | - Yong-Yu Li
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China
| | - Jia-Qing Quan
- Wan Jiang New Industry Technology Development Center, Tongling, 244000, China
| | - Na Ma
- Institute of Environment, Hefei Comprehensive National Science Center, Hefei, 230088, China
| | - Shi-Hua Chen
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.
| | - Xing-Jiu Huang
- Institute of Environment, Hefei Comprehensive National Science Center, Hefei, 230088, China; Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
| | - Zong-Yin Song
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China.
| | - Meng Yang
- Institute of Environment, Hefei Comprehensive National Science Center, Hefei, 230088, China; Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; Wan Jiang New Industry Technology Development Center, Tongling, 244000, China.
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Cheng C, Zhang Y, Chen H, Zhang Y, Chen X, Lu M. Reduced graphene oxide-wrapped La 0·8Sr 0·2MnO 3 microspheres sensing electrode for highly sensitive nitrite detection. Talanta 2023; 260:124644. [PMID: 37182290 DOI: 10.1016/j.talanta.2023.124644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 04/28/2023] [Accepted: 05/03/2023] [Indexed: 05/16/2023]
Abstract
An electrochemical nitrite sensor based on perovskite oxides La0·8Sr0·2MnO3 (LSM) microspheres-decorated reduced graphene oxide (rGO) composite was presented to take the merit of the excellent electrocatalytic activity of the LSM and the large surface area of rGO. The content of rGO has been finely adjusted and the electrochemical sensor employing 15 wt% rGO has shown an ultralow nitrite detection limit of 0.016 μM and a high sensitivity of 0.041 μA μM-1 cm-2 and 0.039 μA μM-1 cm-2 in the range of 2-100 and 100-5000 μM, respectively. In addition, the proposed electrode shows good selectivity, reproducibility and stability, suitable for detection of nitrite at various pH values. The sensor was used to determine the nitrite level in environmental water samples with acceptable relative error, demonstrating its feasibility for practical environmental monitoring.
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Affiliation(s)
- Chu Cheng
- Pen-Tung Sah Research Institute of Micro-Nano Science & Technology, Xiamen University, Xiamen, 361005, China
| | - Yixin Zhang
- Pen-Tung Sah Research Institute of Micro-Nano Science & Technology, Xiamen University, Xiamen, 361005, China
| | - Hongyu Chen
- Pen-Tung Sah Research Institute of Micro-Nano Science & Technology, Xiamen University, Xiamen, 361005, China
| | - Yulong Zhang
- Pen-Tung Sah Research Institute of Micro-Nano Science & Technology, Xiamen University, Xiamen, 361005, China
| | - Xinyi Chen
- Pen-Tung Sah Research Institute of Micro-Nano Science & Technology, Xiamen University, Xiamen, 361005, China.
| | - Miao Lu
- Pen-Tung Sah Research Institute of Micro-Nano Science & Technology, Xiamen University, Xiamen, 361005, China.
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