SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Jiayi Qu,Yujun Guo,Xingtai Chen,Hongsen Xie,Shuheng Ding,Haoyun Zhao,Xiaoning Wang,Davoud Dastan,Xi-Tao Yin,Xiaoguang Ma
This paper reports the first hydrothermal synthesis of Nd-doped (1–4 mol%) CdS gas sensor materials. After gas sensitivity testing, it was found that sensors doped with 3 mol% performed best in detecting n-butanol gas at 275 °C: the response to 100 ppm n-butanol reached 127 (approximately 3.34 times that of pure CdS), Compared with common VOC gases in daily life, the sensor has good selectivity for n-butanol, with an extremely fast recovery time (3 s). It also demonstrated extremely high detection accuracy (R² = 0.96857) across a concentration range of 10–300 ppm n-butanol, along with excellent humidity resistance and long-term stability. Characterization of the material was conducted using XRD (X-ray diffraction), SEM (scanning electron microscope), TEM (transmission electron microscope), and XPS (X-ray photoelectron spectroscopy), revealing the following reasons for the enhanced gas-sensing performance: 1. Nd³ ⁺ doping causes lattice distortion, forming a highly active region around the sulfur vacancy and enhancing the gas-vacancy electron exchange efficiency. 2. Lattice distortion inhibits grain growth (≈26.85 nm), providing more gas adsorption/reaction sites and significantly improving the response value. reaction sites, significantly improving the response value. 3. Nd³ ⁺ reduces the adsorption energy of n-butanol, promoting gas adsorption/reaction processes while accelerating desorption. This paper provides materials with practical application value for sensors used in n-butanol detection.
研究领域:
材料科学
·
化学传感器
·
纳米技术
·
气体传感
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Materials Science
·
2022
·Vol. 16
·期 4
·1-9
·
IF 2.612
Zhu Chaoqi,Li Xiang,Wang Xiaoxia,Su Huiyu,Ma Chaofan,Guo Xiang,Xie Changsheng,Zeng Dawen
Efficient chemical warfare agents (CWAs) detection is required to protect people from the CWAs in war and terrorism. In this work, a Pd-doped SnO 2 nanoparticles-based gas sensor was developed to detect a nerve agent simulant named methyl salicylate. The sensing measurements of methyl salicylate under different Pd doping amounts found that the 0.5 at.% Pd-doped SnO 2 exhibited a significant improvement in the detection of methyl salicylate at the ppb (1 ppb = 10 −9 ) level, and the response value to 160 ppb methyl salicylate is 0.72 at 250 °C. Compared with the pure SnO 2 , the response value is increased by 4.5 times, which could be attributed to the influence of the noble metal Pd on the oxygen state and its catalytic effect. In addition, the 0.5 at.% Pd-doped SnO 2 sensor still has an obvious response to 16 ppb methyl salicylate with a response value of 0.13, indicating the lower detection limit of the sensor.
研究领域:
材料科学
·
化学传感器
·
纳米技术
·
环境监测
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Jianwang He,Hu Meng,Xiaoxin Wang,Yan Xu,Liang Feng
Hexafluoroethane (CF 3 CF 3 ) is a significant greenhouse gas and a potential threat to the environment as emissions increase. However, there is no simple and effective method to detect CF 3 CF 3 yet. Hence, we first attempted to use metal oxide semiconductor (MOS) gas sensors for CF 3 CF 3 detection. Pristine SnO 2 and S-doped SnO 2 (1–3, representing different S contents) nanoparticles were synthesized. S elements successfully doped into the crystal structure of SnO 2 . The optimized sensor (S-SnO 2 -2) shows excellent CF 3 CF 3 sensing performance at 200 °C. The response value of the S-SnO 2 -2 sensor to 25 ppm CF 3 CF 3 at 200 °C is 13.44, which is significantly higher than the pristine SnO 2 response value of 4.45. The S-SnO 2 -2 sensor also exhibits a short response and recovery time (10 s and 148 s), reliable linear response, excellent selectivity, low limit of detection (0.5 ppm), satisfactory reparability, and good long-term stability. The sensing process of CF 3 CF 3 has been investigated by means of gas chromatography-mass spectrometry (GC-MS). The excellent sensing performance of CF 3 CF 3 in the S-SnO 2 -2 sensor can be attributed to the abundant active oxygen, excellent electron capture capability, and fast charge transfer of S-SnO 2 -2, which also benefits from its smaller grain size. This work is the first to report CF 3 CF 3 sensing using MOS gas sensors and has developed a feasible way for CF 3 CF 3 detection.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
气体传感
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
YaHui Cai,ShuYi Ma,TingTing Yang,Li Wang,Ni Na Ma,Miao Miao Liu
The pure YVO 4 and heterostructured YVO 4 /V 2 O 5 gas sensitive materials were prepared by simple and economic hydrothermal path. A variety of characterization methods were used to study the morphology, specific surface area and binding state of YVO 4 /V 2 O 5 composites. The results show that the YVO 4 /V 2 O 5 composites has smaller particle size (reduced from 200 nm to 50 nm) and larger specific surface area, which is increased from 7.738 m 2 /g to 26.586 m 2 /g). Compared with pure YVO 4 , the n-type sensor based on YVO 4 /V 2 O 5 composites has higher response value (increased from 12.29 to 42.15), lower optimal operating temperature (reduced from 200 °C to 140 °C), and shorter response/recovery time (reduced from 11 s/25 s–6 s/14 s). The YVO 4 /V 2 O 5 composites gas sensor has excellent selectivity and good long-term stability for triethylamine gas. The study of gas sensing mechanism shows that n-n heterojunctions and large specific surface area conduce excellent gas-sensitive property of YVO 4 /V 2 O 5 composites. This work provides a valuable direction for low-cost preparation of TEA sensors with excellent performance and long-term stability.
研究领域:
材料科学
·
化学传感器
·
气体传感技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Jian Fang,Jing-Jing Xue,Rong-Pu Xiao,Xi Chen,You-Min Guo,Ji-Ming Song
The development of high performance triethylamine (TEA) sensors for the protection of human safety is essential. Herein, we reported a promising semiconductor metal oxide (SMO) gas sensor based on Pr-doped ZnO nanospindles as the sensing materials for the detection of TEA. The elemental composition and micromorphology of the as-prepared samples were systematically analyzed. The gas sensing performance of the pristine, 1 mmol%, 2 mmol%, and 3 mmol% Pr-ZnO sensor was evaluated. Among them, the 2 mmol% Pr-ZnO sensor exhibited the highest response value for TEA gas, and reached 158.0 towards 50 ppm TEA at 200 °C, which was about 10.0-fold higher than the response value of the pristine ZnO sensor. In addition, the 2 mmol% Pr-ZnO sensor also showed good reproducibility, rapid response/recovery time (10/46 s), theoretical limit of detection (168 ppb), outstanding long-term stability, and excellent selectivity for TEA gas.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 19
·6702-6709
·
IF 4.39
Qiuci Yu,Yuchi Zhang,Yan Xu
Metal oxide-based gas sensors have drawn tremendous research interests owing to their various compositions and selective and improved performance. However, the development of a targeted metal oxide with controlled microstructures via a facile preparation procedure is still a challenge. In this work, hierarchical BiFeO3 nano-microstructures are successfully developed through the post-modification of Bi3+ encapsulation with Fe-based Prussian blue microcubes followed by a sequential annealing strategy. The microstructures of the hierarchical BiFeO3 architectures can be effectively modulated by tuning various thermolysis temperatures. Among them, the hierarchical hollow BiFeO3 microcubes assembled from ultrathin nanosheets exhibit optimum acetone selective sensing performances with a gas response value (Ra/Rg) of 5.2 at 240 °C, rapid response/recovery times (10 s/9 s), and excellent long-term stability (for at least 30 days). The high and reproducible acetone-sensing properties are mainly attributed to the unique interior loose and porous structures with good permeability. The corresponding acetone sensing mechanism relying on the microstructure of BiFeO3 was also discussed. This work highlights the key role of morphological evolution in the fabrication of multi-functional multimetal oxides, and thus offers new opportunities for the rational design of novel gas sensing materials.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
化学传感器
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Xinxin Xing,Yue Yang,Zhiyong Yan,Ying Hu,Tong Zou,Zidong Wang,Yude Wang
In this work, CdO-Ag-ZnO nanocomposites with hierarchically porous structure and large surface area were successfully fabricated by solution combustion synthesis (SCS) method. Crystalline structure, morphology, surface chemical states and specific surface area were investigated by XRD , SEM, TEM, XPS and BET techniques, respectively. Sensors fabricated from CdO-Ag-ZnO nanocomposites were made based on indirect heating method, which showed superior sensing properties in detecting different concentration of volatile organic compounds (VOCs). In contrast with singular ZnO, gas-sensing experiment results reveal that the addition of CdO and Ag effectively decreases optimum working temperature, increases gas response value and shortens response and recovery time. What’s more, other gas-sensing properties including repeatability, sensitivity and long-term stability are also discussed in this research. Particularly, gas sensor based on 10 mol% CdO-Ag-ZnO shows modest gas-sensing performance to VOCs at the operating temperature of 200 °C, and its gas response values are 198.63, 156.07, 53.04, 64.23, 183.65 towards 100 ppm formaldehyde, ethanol, acetone, methanol and isopropanol, respectively, indicating it a promising candidate in detecting VOCs. Superior sensing property is mainly ascribed to large specific surface area, special porous surface morphology, unique combination of nanocomposites and good catalytic ability of metallic Ag.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
环境监测
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jingjing Liu,Bicheng Zhu,Liuyang Zhang,Jiajie Fan,Jiaguo Yu
It is imperative to seek for novel materials with pronounced gas sensing performance towards triethylamine for the sake of human health. Herein, we successfully fabricate an outstanding triethylamine sensor based on CdS/ZnO composite with 0D/2D structure, which are prepared by in-situ growth of CdS quantum dots on ultra-thin ZnO nanosheets . The ratios between the two ingredients are adjusted and their effect is evaluated. The optimal sample exhibits the lowest operating temperature of 200 °C, the highest response value of ~20 and the fastest response time of 2 s. Besides, it also has the virtues of durable stability, excellent selectivity and superior anti-interference ability. The mechanism behind the aforementioned intriguing performance is investigated by X-ray photoelectron spectroscopy, Kelvin probe and density function theory (DFT) simulation. All the results verify that the enhanced gas sensing properties are derived from splendid 0D/2D structure, n - n heterojunction and large specific surface area. Additionally, this study opens an avenue for designing sensors with 0D/2D structure.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Baikerouzi Baihetiyaer,Nan Jiang,Xianxu Li,Bo He,Jun Wang,Xiaoteng Fan,Huimin Sun,Xianqiang Yin
The environmental issues caused by biodegradable microplastics (BMPs) from polylactic acid (PLA) as well as pesticides are of increasing concern nowadays. In this study, the toxicological effects of the single and combined exposure of PLA BMPs and imidacloprid (IMI), a neonicotinoid insecticide, on earthworms ( Eisenia fetida ) were investigated in terms of oxidative stress , DNA damage, and gene expression, respectively. The results showed that compared with the control, SOD, CAT and AChE activities in the single and combined treatments decreased significantly, and POD activity showed an “inhibition-activation” trend. SOD and CAT activities of combined treatments on day 28 and AChE activity of combined treatment on day 21 were significantly higher than those of the single treatments. For the rest of the exposure period, SOD, CAT and AChE activities in the combined treatments were lower than those in the single treatments. POD activity in the combined treatment was significantly lower than those of single treatments at day 7 and higher than that of single treatments at day 28. MDA content showed an “inhibition-activation-inhibition” trend, and the ROS level and 8-OHdG content increased significantly in both the single and combined treatments. This shows that both single and combined treatments led to oxidative stress and DNA damage. ANN and HSP70 were expressed abnormally, while the SOD and CAT mRNA expression changes were generally consistent with the corresponding enzyme activities . The integrated biomarker response (IBR) values were higher under combined exposures than single exposures at both biochemical and molecular levels, indicating that combined treatment exacerbated the toxicity. However, the IBR value of the combined treatment decreased consistently at the time axis. Overall, our results suggest that PLA BMPs and IMI induce oxidative stress and gene expression in earthworms at environmentally relevant concentrations, thereby increasing the risk of earthworms.
研究领域:
环境科学
·
毒理学
·
分子生物学
·
生态毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）