Article
Materials Science, Multidisciplinary
Wei Li, Kaijian Xing, Porun Liu, Chenghao Chuang, Ying-Rui Lu, Ting-Shan Chan, Tuquabo Tesfamichael, Nunzio Motta, Dong-Chen Qi
Summary: This work demonstrates an ultrasensitive NO2 gas sensor based on alpha-phase molybdenum trioxide (alpha-MoO3) with superb selectivity and reversibility. The sensor shows high sensitivity towards NO2 with a low detection limit at optimal operating temperature, thanks to the layered nature of the alpha-MoO3 nanoribbons and their hierarchical assembly as the sensing layer.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Wei Li, Mahboobeh Shahbazi, Kaijian Xing, Tuquabo Tesfamichael, Nunzio Motta, Dong-Chen Qi
Summary: In this work, 2D MoS2@MoO3 heterostructures were synthesized and their morphological, structural, and compositional properties were studied. The heterostructures showed room-temperature ferromagnetism and exhibited p-type-like response towards NO2, with excellent selectivity and reversibility. This study demonstrates the promising application of 2D molybdenum hybrid compounds in gas sensing with unique electronic and magnetic properties.
Article
Chemistry, Physical
Wei Li, Qingdong Ou, Xiaodong Wang, Kaijian Xing, Tuquabo Tesfamichael, Nunzio Motta, Dong-Chen Qi
Summary: This study reports a scalable NO2 gas sensor based on centimeter-sized single-crystalline alpha-MoO3. The sensor exhibits outstanding sensitivity, selectivity, and reversibility towards NO2, with a limit of detection as low as 5 ppb. The scalability and intrinsic sensing response are demonstrated by fabricating microscale sensor devices on individual exfoliated alpha-MoO3 nanoribbons. The study presents promising opportunities for developing a high-performance gas sensing platform based on crystalline alpha-MoO3.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
D. B. Patil, V. L. Patil, S. S. Patil, T. D. Dongale, N. D. Desai, P. R. Patil, R. M. Mane, P. N. Bhosale, P. S. Patil, P. M. Kadam, Kishorkumar Khot
Summary: A cost-effective chemical route was used to develop orthorhombic MoO3 for gas sensing, with a stable crystal structure and high sensitivity and selectivity towards NO2 gas detection.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Electrochemistry
Weiwei Meng, Ling Wang, Huizhu Zhou, Zhangxing He, Lei Dai
Summary: In this study, a novel amperometric NO2 sensor was developed with a nanostructured La0.8Sr0.2MnO3-delta (nano-LSM) sensing electrode and a Ce0.8Gd0.2O1.9 (CGO) electrolyte. The addition of LSM into the CGO porous layer significantly improved the sensitivity and stability of the sensor by reducing diffusion resistance and enhancing oxygen exchange performance.
ELECTROCHIMICA ACTA
(2022)
Article
Materials Science, Multidisciplinary
Dhanashri Sabale, Namdev Harale, Rajat Srivastava, Pramod S. Patil, Kiran Kumar K. Sharma
Summary: This study explores the gas-sensing performance of polycrystalline MoO3 thin films prepared using spray pyrolysis technique. The optimized MoO3 thin-film sensor exhibits excellent sensitivity, selective gas response and stability towards NO2 gas, attributed to the high electron affinity of NO2 molecules, presence of more oxygen vacancies and high surface-to-volume ratio of MoO3 nanobelts thin films.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Chemistry, Physical
Burcu Karagoz, Roman Tsyshevsky, Lena Trotochaud, Yi Yu, Osman Karslioglu, Monika Blum, Bryan Eichhorn, Hendrik Bluhm, Maija M. Kuklja, Ashley R. Head
Summary: This study investigated the interaction mechanisms between NO2 and MoO3 and CuO surfaces, revealing their impact in gas filtration and sensing applications. The results suggest that NO2 removes hydroxyl and O-vac binding sites on the surfaces of these materials when used in gas filtration and sensing applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Analytical
Shuang Qi, Lei Dai, Weiwei Meng, Yuehua Li, Ling Wang
Summary: Bi2O3 modified LSCF composites were successfully prepared and utilized as the sensing electrode of an amperometric NO2 sensor with YSZ electrolyte. The LSCF-20% Bi2O3 based sensor showed the highest sensitivity (0.301 mu A /ppm at 550 degrees C) among the different concentrations of NO2 tested (25-300 ppm). The LSCF-xBi2O3-SE sensors exhibited better sensitivity and anti-interference capability compared to the LSCF-based sensor.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Danlei Li, Christopher Batchelor-McAuley, Richard G. Compton
Summary: An amperometric method was used to measure oxygen content in sheep's blood, with a linear relationship observed between chronoamperometric current and oxygen concentration. Additionally, this study presents the first investigation of direct voltammetry in sheep's blood and proposes a dissociative CE process to explain the electrochemical behavior of oxygen reduction.
Article
Engineering, Electrical & Electronic
Rahul Kumar, Neeraj Goel, Ramesh Raliya, Govind Gupta, Pratim Biswas, Jun Zhang, Mahesh Kumar
Summary: Researchers decorated plasmonic Au nanoparticles on the surface of chemically vapor deposition (CVD) grown 2D MoS2 nanosheets, demonstrating bifunctional sensing behavior within a single device with higher gas sensitivity and enhanced photoresponse.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Amit Kumar Shringi, Amit Kumar, Maloy Das, Sang Sub Kim, Hyoun Woo Kim, Mahesh Kumar
Summary: Novel metal functionalization of semiconductor metal oxide surfaces can effectively improve the selectivity and sensitivity of gas sensors. In this study, the functionalization of α-Fe2O3 sensor with silver nanoparticles enhanced its sensing performance for NO2 molecules, resulting in a higher relative response rate.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Qingting Li, Wen Zeng, Yanqiong Li
Summary: This article reviews the NO2 gas sensor based on metal oxides. It discusses the hazards of NO2, the disadvantages of chemiresistive sensors based on metal oxides, and different sensitive materials. It also explores NO2 gas sensors based on metal oxides from various aspects such as morphology, preparation, modification, doping, and composite.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Zhidong Jin, Chengxiang Wang, Lili Wu, Haixiang Song, Xingyu Yao, Jiurong Liu, Jinbo Zhao, Zhihui Zeng, Fenglong Wang
Summary: Ni-doped In2O3 nanoparticles were synthesized via a simple metal-organic framework-derived solvothermal method, exhibiting ultrafine particles with an average size of 13 nm. The gas sensing tests showed that the sensors composed of Ni-doped In2O3 nanoparticles had fast response/recovery properties, with response and recovery speeds of 2 and 2 s, respectively, towards 10 ppm NO2. Moreover, the sensors demonstrated high sensitivity with a response value of about 70 at the optimum working temperature of 200 degrees C and a low detection limit of 5 ppb.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Inyalot Jude Tadeo, Rajasekar Parasuraman, Arun M. Umarji
Summary: The article introduces the synthesis, characterization, and gas sensing properties of V2O5 thin films prepared at different temperatures using ultrasonic nebulization. The V2O5-Qu-350 thin films exhibited the highest response towards ethanol and NO2, showing potential for detecting these gases in various environments.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Huijeong Chae, Ji Min Han, Yejin Ahn, Ji Eon Kwon, Wi Hyoung Lee, Bong-Gi Kim
Summary: Three conjugated polymers were designed to investigate the NO2 detection capability of FET sensors. The introduction of an ethylene oxide-modified side chain improved the NO2-affinity of the CPs and induced favorable pathways for NO2 diffusion, leading to enhanced NO2-response characteristics.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
