Article
Chemistry, Multidisciplinary
Shama Sadaf, Hongpeng Zhang, Ali Akhtar
Summary: In this study, a series of MoS2 and NiO nanocomposites were synthesized and used for detecting low concentrations of H2S gas. The MNO-10 gas sensor exhibited the highest response value, good selectivity, and long-term stability.
Article
Chemistry, Analytical
Adelina Stanoiu, Andrei C. Kuncser, Daniela Ghica, Ovidiu G. Florea, Simona Somacescu, Cristian E. Simion
Summary: NiO-loaded SnO2 powders were prepared and investigated for H2S sensing properties, with 1wt.% NiO/SnO2 selected for studying the sensing mechanism through electrical resistance and work function analysis. Different gas interaction partners were found to be dependent on the amount of H2S, with a threshold value of 5 ppm representing the lower limit of health effects.
Article
Engineering, Electrical & Electronic
Yang Liu, Zhenyu Yuan, Renze Zhang, Hanyang Ji, Chaoyang Xing, Fanli Meng
Summary: Combining 1-D MoO3 nanorods and SnO2 nanoparticles, the MoO3/SnO2 nanocomposite shows improved speed and response performance. The composite has achieved significant results in terms of electron transport and interface optimization, demonstrating low detection limit and rapid response/recovery speed.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Chemistry, Inorganic & Nuclear
Haohua Li, Baibo Ding, Jian Wu, Quanjiang Lv
Summary: In this study, pure MoO3 and MoO3/NiO nanolamellas were fabricated and their structural and morphological properties were investigated. The gas sensing measurements showed that MoO3/NiO-5MN exhibited the best hydrogen sensing capability and selectivity, with a response rate 1.85 times higher than that of pure MoO3.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Merve Zeyrek Ongun, Sibel Oguzlar, Mustafa Erol
Summary: The performance of optical oxygen sensors can be improved by adding metal oxide semi-conductors (MOSs) additives. In this study, meso-tetraphenylporphyrin (H2TPP) dye was immobilized in a polymeric thin film and NiO, SnO2, and Ni:SnO2 metal oxide particles were added as additives to investigate oxygen-sensitive optical chemical sensor properties. The H2TPP combined with Ni:SnO2 semiconductor exhibited higher oxygen sensitivity, larger response range, higher Stern-Volmer constant, and faster response time compared to other forms.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Junqiang Bao, Ziyi Zhang, Yangong Zheng
Summary: Two-dimensional MoO3 nanoflakes were successfully synthesized and used in a high-performance gas sensor at high temperature. The sensor exhibited high resistance to humidity and employed a novel sensing mechanism based on the transition between sulfidation and oxidation.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Shi-Kai Shen, Xin-Lei Cui, Chuan-Yu Guo, Xin Dong, Xian-Fa Zhang, Xiao-Li Cheng, Li-Hua Huo, Ying-Ming Xu
Summary: The sensing mechanism remains a major issue in gas sensor technology, with the study of sensing mechanisms providing better ideas for sensor material design and improving gas-sensing performance. In this study, Ag was loaded into alpha-MoO3 nanobelts to improve the material's selectivity to hydrogen sulfide, resulting in enhanced gas sensing properties. The 5 wt% Ag/alpha-MoO3 sensor showed a response of 225 to 100 x 10(-6) hydrogen sulfide with a detection limit of 100 x 10(-9), showcasing the effectiveness of the sensing mechanism.
Article
Materials Science, Multidisciplinary
Navvabeh Salarizadeh, Mehran Habibi-Rezaei, Seyed Jalal Zargar
Summary: This study successfully synthesized a nickel oxide-molybdenum trioxide nanocomposite through a simple hydrothermal method and applied it as a non-enzymatic sensor for glucose and urea detection. The experimental results demonstrate that the nanocomposite exhibits excellent activity and stability.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Wei Jin, Huan Wang, Yueli Liu, Shuang Yang, Jing Zhou, Wen Chen
Summary: This study developed SnO2 quantum dots-functionalized MoO3 nanobelts for highly selective and sensitive ethylene detection. The prepared 2.5%-SnO2 QDs/MoO3 NBs exhibited excellent response, low detection limit, and selectivity at a low operating temperature.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Haoming Sun, Meng Cao, Pinhua Zhang, Xiaojing Tian, Manli Lu, Lulu Du, Kaifeng Xue, Guangliang Cui
Summary: This study demonstrates the enhancement of gas sensitivity in Cu2O/NiO heterostructured nanoarrays for H2S gas detection using a magnetic field. The results show that the response rate of the nanoarrays is significantly improved by the magnetic field, especially at low concentrations.
Article
Engineering, Electrical & Electronic
Chu Manh Hung, Han Viet Phuong, Vu Van Thinh, Le Thi Hong, Nguyen Tat Thang, Nguyen Hong Hanh, Nguyen Quang Dich, Nguyen Van Duy, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: The nanofibers of ZnO-SnO2 nanocomposites doped with Au crystals were successfully synthesized using electrospinning method, leading to a significant enhancement in gas sensing performance towards H2S gas. The doping of Au crystals on the surface of nanofibers improved the effective surface catalyzed gas reaction, resulting in approximately 700% improvement in gas sensitivity towards H2S gas.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Ceramics
Lili Jiang, Sihao Tu, Kang Xue, Haitao Yu, Xingang Hou
Summary: In this study, a SnO2/NiO composite material was prepared through co-precipitation, followed by the synthesis of a GO/SnO2/NiO ternary composite material. The ternary composite showed improved gas sensitivity to acetone compared to SnO2/NiO, with enhanced response time, recovery time, and sensitivity. GO/SnO2/NiO demonstrated great potential in acetone gas detection due to its unique structures and synergistic effects.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Analytical
Cheng Feng, Congting Zhang, Chang Xu, Shuang Lin, Baohua Zhang, Huanxing Wu, Zheng Zhang, Xinming Guo, Haineng Bai, Fuqiang Guo
Summary: The paper presents a ppb-level H2S sensor based on MoO3/CuO/g-C3N4, which has a low detection limit and excellent gas sensing properties. The MCC-2 sensor has a larger specific surface area and more adsorbed oxygen and oxygen vacancy, enabling a high response to 1000 ppb H2S at room temperature and the lowest theoretical detection limit among recent H2S sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Yanhui Sun, Jiawen Cui, Chuanxi Wang, Shouhang Fu, Shupeng Sun, Xue Wang
Summary: In this study, two-dimensional MoO3 nanoflakes with enriched oxygen vacancies were synthesized by hydrothermal method to improve the sensitivity of MoO3 sensors for hydrogen sulfide (H2S). The relationship between the oxygen vacancies concentration, the hydrothermal method temperature, and the solution concentration (ethanol) was investigated. The synthesized material MoO3_x-13021 with the highest oxygen vacancy concentration showed enhanced H2S-sensing properties compared to defect-free MoO3 sensors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yuan-yuan Li, Rong-yi Wu, Ming Yang, Hui Yu, Ying Yang, Xiang-ting Dong
Summary: A novel and uniform 3D aloe-like SnO2 material with ordered mesoporous structure and excellent gas sensing performance to H2S has been successfully synthesized.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)