Article
Chemistry, Physical
M. M. Gomaa, M. H. Sayed, V. L. Patil, M. Boshta, P. S. Patil
Summary: This study successfully obtained nickel oxide thin films using a cost-effective chemical spray pyrolysis approach, which showed a polycrystalline cubic structure. The optical transmittance decreased with increasing deposition time, and the highest sensitivity for NO2 detection was found in the NiO thin film deposited for 5 minutes, demonstrating good stability and selectivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Yueyue Li, Meng Dai, Jihao Bai, Yilin Wang, Yuan Li, Chenchang Wang, Fengmin Liu, Peng Sun, Tianshuang Wang, Geyu Lu
Summary: Two-dimensional SnS2, with stable electron transport capacity, high specific surface area, and high surface activity, is a promising material for gas sensors at room temperature. In this study, ultra-thin SnS2 nanopetals were synthesized and planar sensors were obtained by coating SnS2 on a substrate with interdigitated electrodes. The sensor annealed at 200 degrees C displayed the best sensing performance with a high response of 24.20 to 100 ppb NO2 at room temperature and an ultra-low detection limit of 5 ppb NO2. Additionally, this sensor showed good repeatability, selectivity, and long-term stability, indicating the excellent application prospects of SnS2 in trace-level NO2 detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Environmental
Quan Sun, Zhongmiao Gong, Yijian Zhang, Juanyuan Hao, Shengliang Zheng, Wen Lu, Yi Cui, Lizhao Liu, You Wang
Summary: Defect and interlayer engineering are two promising strategies to alter the electronic structures of sensing materials for improved gas sensing properties. The ethylene glycol intercalated Al-doped SnS2 (EG-Al-SnS2) developed in this study exhibited enhanced NO2 sensing performance at room temperature due to the synergistic effect of Al doping, S vacancies, and expanded interlayer spacing.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Ho Huu Hau, Truong Tien Hoang Duong, Nguyen Khac Man, Tran Thi Viet Nga, Chu Thi Xuan, Dang Thi Thanh Le, Nguyen Van Toan, Chu Manh Hung, Nguyen Van Duy, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: MoS2 nanosheets exfoliated from bulk MoS2 through sonication probe exhibit enhanced NO2 gas sensing properties, with high response rates, low detection limits, and excellent long-term stability, showing potential for future practical applications.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Multidisciplinary
Shuiting Luo, Mingyue Lv, Ye Tian, Lin Jiang, Li Li, Keying Shi
Summary: Monometallic cobalt layered double hydroxides (Co-LDHs) with 3D mesoporous nanostructures were synthesized using a simple hydrothermal method. These materials exhibited remarkable gas-sensing performance with short response time and low detection limit.
Article
Chemistry, Analytical
Seokhun Kwon, Seokwon Lee, Joouk Kim, Chulmin Park, Hosung Jung, Hyungchul Kim, Chulsoo Kim, Hyunil Kang
Summary: A gas sensor based on GNWs/NiO-WO3/GNWs heterostructure was fabricated to detect NO2 gas concentration at room temperature, showing excellent recovery characteristics and sensitivity to humidity.
Article
Chemistry, Physical
Yanming Sun, Zhezhe Ding, Yupeng Zhang, Zhe Dong, Lei Sun, Neng Wang, Meijie Yin, Jian Zhang, Guo Ping Wang
Summary: In this study, a NO2 sensor based on NiO nanosheets composited with carbon nanocoils (CNCs) was developed, demonstrating significantly higher sensitivity compared to bare NiO nanosheets. The nanocomposite showed nearly 8 times higher response to 60 ppm NO2 at room temperature and had a detection concentration limit of 60.3 ppb, making it suitable for sensing NO2 at low concentrations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Analytical
Xiangxiang Chen, Sikai Zhao, Pengfei Zhou, Baoyu Cui, Wenbao Liu, Dezhou Wei, Yanbai Shen
Summary: A room-temperature NO2 gas sensor based on Au-functionalized CuO nanorods was fabricated in this study. By controlling the amount of Au functionalization, the sensitivity and recovery performance can be optimized, showing good selectivity and repeatability. The sensing mechanism of the materials to NO2 was investigated through changes in energy band gap and activation energy with Au functionalization.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Chao Zhang, Ying Li, Guifang Liu, Kewei Liu, Kaidi Wu
Summary: This article introduces a method for preparing ZnO1-alpha by hydrogen heat treatment and studies its sensing properties in monitoring NO2 concentration. The results show that the ZnO1-alpha coating heat-treated in a reduced atmosphere for 1 hour exhibits the best performance at room temperature under blue light irradiation.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Shengliang Zheng, Dongmin Yin, Shengpei Zhang, You Wang, Jiayu Li, Zhengjia Wang, Ye Yuan, Hsu-Sheng Tsai, Juanyuan Hao
Summary: The influence of vacancy defects on the gas sensing performance of MoSe2 is studied, and it is found that defect engineering can enhance the gas sensing response. The increase in adsorption energy and decrease in charge transfer caused by vacancies are the reasons for the improvement in sensing performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Shengliang Zheng, Dongmin Yin, Shengpei Zhang, You Wang, Jiayu Li, Zhengjia Wang, Ye Yuan, Hsu-Sheng Tsai, Juanyuan Hao
Summary: In this study, MoSe2 nanoflowers with Se vacancies were synthesized, and the vacancies were identified. Oxygen passivation was then used to tailor the vacancy density, leading to a 6.3-fold enhancement in the room-temperature NO2 sensing response. Density functional theory calculations revealed that the vacancies increased adsorption energy and decreased charge transfer during NO2 sensing. The findings suggest that optimizing the vacancy density can maximize the sensing response by enhancing the role of vacancies as active sites.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Pramod Sharma, Sanjay Kumar, B. Vishwanadh, K. G. Girija
Summary: Metal oxide nanomaterials with grain sizes approaching or less than the Debye length show promise as highly sensitive gas sensors due to their large surface-to-volume ratio. This study focuses on the cost-effective synthesis of NiO nanoparticles for gas sensing applications. The results show that co-precipitated NiO nanoparticles exhibit higher sensitivity attributed to the abundance of adsorption sites brought about by the smaller grain size.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Javier Bartolome, Maria Taeno, Ruth Martinez-Casado, David Maestre, Ana Cremades
Summary: Conductometric gas sensors based on metal oxide semiconductors often require high temperature operation, but this study focuses on room temperature operation of p-type NiO ceramic samples in response to ethanol. An anomalous response with fast response and recovery times is observed when the samples are synthesized at different temperatures, and a model is proposed to explain this unexpected resistance decrease upon ethanol exposure. This model could potentially lead to the development of fast sensors operating at room temperature for other MOS systems.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
V. L. Patil, D. S. Dalavi, S. B. Dhavale, N. L. Tarwal, S. A. Vanalakar, A. S. Kalekar, J. H. Kim, P. S. Patil
Summary: This report focuses on the deposition of nanocrystalline aluminium doped ZnO (Al doped ZnO: AZO) samples on seeded glass substrates using a cost-effective reflux method. The doping concentration of 'Al' ions ranged from 1 to 3 vol%. The study found that the deposited AZO samples exhibited a wurtzite hexagonal crystal structure and the formation of nanorods for undoped ZnO, with a reduction in diameter and the formation of fine tips for AZO samples. The photoluminescence study confirmed the presence of oxygen vacancies and defects in the AZO samples. Furthermore, the AZO samples demonstrated excellent gas sensing performance towards NO2 gas at a temperature of 175 degrees C, with a gas sensitivity of 85% for 5 ppm NO2 gas. This work shows promise for practical applications in the gas sensor technology field, particularly for low detection limits at low operating temperatures.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Analytical
Fang Niu, Jia-Lin Zhu, Ming-Kun Xu, Yong Ding, Li-Ming Tao, Jun Jin
Summary: Viologen-based covalent triazine frameworks (Vio-CTFs) were constructed via ionic thermal polymerization in melt ZnCl2 at 400-550 degrees C. The prepared Vio-CTFs showed excellent NO2 sensing ability with high response values, fast response and recovery, unique selectivity and stability. The viologen fragment was identified as the active site for NO2 adsorption, and DFT calculation was conducted to explore the NO2 sensing mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Multidisciplinary
Wan Zhang, Changsheng Xie, Guozhu Zhang, Jian Zhang, Shunping Zhang, Dawen Zeng
MATERIALS CHEMISTRY AND PHYSICS
(2017)
Article
Materials Science, Multidisciplinary
Haitao Li, Kun Zhao, Shouqin Tian, Dawen Zeng, Aimin Pang, Xiaoxia Wang, Changsheng Xie
Article
Materials Science, Multidisciplinary
Jia Zhang, Dawen Zeng, Hao Wang, Ziyu Qin, Aimin Pang, Changsheng Xie
Article
Chemistry, Physical
Jian Zhang, Ziyu Qin, Dawen Zeng, Changsheng Xie
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2017)
Article
Chemistry, Analytical
Jian Zhang, Jinjin Wu, Xiaoxia Wang, Dawen Zeng, Changsheng Xie
SENSORS AND ACTUATORS B-CHEMICAL
(2017)
Article
Chemistry, Analytical
Ziyu Qin, Chao Ouyang, Jian Zhang, Li Wan, Shimin Wang, Changsheng Xie, Dawen Zeng
SENSORS AND ACTUATORS B-CHEMICAL
(2017)
Article
Chemistry, Analytical
Qian Deng, Shi Gao, Tao Lei, Yansong Ling, Shunping Zhang, Changsheng Xie
SENSORS AND ACTUATORS B-CHEMICAL
(2017)
Article
Chemistry, Physical
Wenfei Li, Yunxiang Chen, Song Wu, Jian Zhang, Hao Wang, Dawen Zeng, Changsheng Xie
APPLIED SURFACE SCIENCE
(2018)
Article
Chemistry, Analytical
Tingting Zhou, Yutong Sang, Xiaoxia Wang, Congyi Wu, Dawen Zeng, Changsheng Xie
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Chemistry, Analytical
Ziyu Qin, Keng Xu, Huacong Yue, Hao Wang, Jian Zhang, Chao Ouyang, Changsheng Xie, Dawen Zeng
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Chemistry, Analytical
Jian Zhang, Die Hu, Shouqin Tian, Ziyu Qin, Dawen Zeng, Changsheng Xie
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Chemistry, Multidisciplinary
Minghui Li, Wulin Song, Lei Zeng, Dawen Zeng, Changsheng Xie, Qun Yang
Article
Chemistry, Multidisciplinary
Xiafen Hu, Xiaoxia Wang, Xin Hu, Changsheng Xie, Dawen Zeng
CHEMICAL COMMUNICATIONS
(2019)
Article
Chemistry, Multidisciplinary
Tingting Zhou, Ziyu Qin, Xiaoxia Wang, Congyi Wu, Xing Tang, Tian Zhang, Hao Wang, Changsheng Xie, Dawen Zeng
CHEMICAL COMMUNICATIONS
(2019)
Article
Chemistry, Inorganic & Nuclear
Kun Zhao, Haitao Li, Shouqin Tian, Wenjuan Yang, Xiaoxia Wang, Aimin Pang, Changsheng Xie, Dawen Zeng
INORGANIC CHEMISTRY FRONTIERS
(2019)