SENSORS AND ACTUATORS B-CHEMICAL
·
2023
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IF 8.4
Guiting Wang,Jiahui Fan,Ying Xie,Menghan Yu,Kun Li,Xu Guo,Jingfeng Wu,Keying Shi,Kai Pan
The fabrication of high-performance gas-sensitive materials with enhanced moisture resistance is an important research topic. In this work, monodisperse Y-type CoO hierarchical nanostructures with a branch length of about 16 nm have been prepared, and then uniformly dispersed on the surface of reduced oxide graphene (rGO) by hot injection method. The composite exhibited a rapid response to NO 2 at room temperature. The optimal response was about 40–100 ppm NO 2 , the response time was 620 s to 10 ppm NO 2 and the detection limit was 0.01 ppm. It was due to the combination of more NO 2 adsorption active sites of Y-type CoO and faster carrier transfer of rGO. Even at high relative humidity (RH) conditions of 80%, the sensor still retained a high response value of about 90% of that measured at the normal RH (25%). The effective wrapping of stearate ligands inhibited the entrance of water vapor molecules, which could effectively improve the hydrophobic properties of the composite and resulted in enhanced moisture resistance. It may provide a new path for improved NO 2 detection with enhanced moisture resistance at room temperature.
研究领域:
材料科学
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纳米技术
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气体传感
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环境监测
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化学传感器
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DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Guoqing Feng,Shihan Wang,Siqing Wang,Pengcheng Wang,Chuntao Wang,Andargie Abebe Setiye,Massamba-Courtois Joanes Benedicte,Jingkun Xiao,Chengwen Song
Assembling a heterojunction-based composite nanomaterial to simultaneously achieve higher response and superior selectivity towards NO 2 under room-temperature conditions remains a great challenge. In this work, the MXene@Polypyrrole heterojunction was synthesized via a facile in-suit chemical polymerization approach. The distribution of sphere-like PPy nanoparticles was confirmed via various characterization techniques. The response value of the 0.5MXP sensor toward 50 ppm NO 2 is significantly higher than that of the pristine MXene based sensor, entailing greater response (6.5-fold). Nearly 98.11% recovery to the base resistance was observed in each sensing cycle. Noteworthy, the Schottky barriers formed between MXene and PPy contact surface, leading to the ideal selectivity and a lower limit of detection. Additionally, the sensor was tested for a 31-days-period with minimal deviation, predicting outstanding reproducibility and durability. The detailed polypyrrole sensitization mechanism containing selectivity mechanism, underlying heterojunction mechanism as well as the Density Function Theory (DFT) calculation were also revealed, offering new ideas for the development of room-temperature nitrogen dioxide sensors. Simultaneously, DFT calculation (21 models, 42 images) revealed the adsorption energy, electron transfer , and charge density differences between the NO 2 molecules and the substrate (MXene, PPy and MXene@PPy). In summary, the outstanding MXene surface functionalization has been exploited by decorating with polypyrrole (PPy) nanoparticles.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Xiangrui Bu,Kunfeng Ding,Qiang Wu,Yubin Yuan,Weihua Liu,Chuanyu Han,Xiaoli Wang,Xin Li
As an n-type metal oxide semiconductor (MOS), vanadium pentoxide (V 2 O 5 ) has shown great potential in gas sensing, especially for the detection of NO 2 . Herein, a highly sensitive NO 2 sensor based on 3D porous V 2 O 5 microrods (MRs) derived from metal organic frameworks (MOFs) was reported. The porous structure of vanadium-based MOF-derivatives (MIL-47) was tuned by the control of annealing temperature (300 °C–600 °C) in the pyrolysis process . The gas sensors with the MOF-derivatives are exposed to NO 2 at 150 ℃ for gas sensing tests. The sensor with MOF-derivatives annealed at 500 °C (MIL-47–500) showed the highest response (527 %) to 50 ppm NO 2 . It also showed excellent selectivity, low limit of detection, and good repeatability. The NO 2 -sensing behaviors of the MIL-47–500 sensor under ultraviolet (UV) illumination have also been investigated. Under UV illumination, the response of the MIL-47–500 sensor increased to 706 %. At 75 °C, the response of the MIL-47–500 sensor toward 50 ppm NO 2 was significantly improved from 57 % to 538 % under UV illumination. The response/recovery times were reduced from 102 s/300–48 s/178 s. The excellent performance was attributed to the unique porous structure of MIL-47–500 and the UV light excited charge carriers.
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高影响因子
Food Analytical Methods
·
2022
·Vol. 16
·期 1
·71-82
·
IF 3.498
Wang Qingying,Chen Lianfang,Li Yongli,Yang Jing,Yang Rui,Yang Xiupei
In this work, a magnetic covalent organic framework (COF) named Fe 3 O 4 @TpPa-NO 2 was designed and synthesized by a solvothermal method employing 1,3,5-triformylphloroglucinol (Tp) and 2-nitro-p-phenylenediamine (Pa-NO 2 ) as the organic units. Fe 3 O 4 @TpPa-NO 2 was explored as an adsorbent for magnetic solid-phase extraction (MSPE) of four pyrethroid insecticides. Fe 3 O 4 @TpPa-NO 2 displayed excellent adsorption capacity in the adsorption test of pyrethroid insecticides. Taking bifenthrin as an example, the adsorption capacity reached 885 mg·g −1 . A sensitive method for the determination of pyrethroid pesticide residues was developed using high-performance liquid chromatography (HPLC) coupled with MSPE. The linearity of the proposed method has a correlation coefficient ( R 2 ) of 0.9992–0.9999 in the range of 15–1000 ng·mL −1 . Under optimal conditions, the limits of detection (LODs) and limits of quantification (LOQs) were 3.98–6.21 and 13.28–22.05 ng·mL −1 , respectively. Furthermore, satisfactory precision and accuracy were obtained with relative standard deviations (RSDs) of 2.58–3.42% and recoveries of 85.7–109.8%. The adsorption mechanism inferred that π-π interactions, hydrophobic interactions, and hydrogen bonding could promote the adsorption of pyrethroids. The developed MSPE-HPLC method has the advantages of rapidity, accuracy, sensitivity, recyclability, and good practical applicability.
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 22
·11980-11989
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IF 12.732
Zhuo Liu,He Lv,Ying Xie,Jue Wang,Jiahui Fan,Baihe Sun,Lin Jiang,Yang Zhang,Ruihong Wang,Keying Shi
Very diverse two-dimensional (2D) materials have bloomed in NO2 gas sensing applications, which provides new opportunities and challenges in function oriented gas sensors. In this work, a 2D/2D/2D structure of the Ti3C2Tx@TiO2@MoS2 composite was well designed via a facile one-step hydrothermal route, in which TiO2 nanosheets are in situ grown on ultrathin and highly conductive Ti3C2Tx MXene. Simultaneously, the few-layer and vertically oriented MoS2 nanoflakes rich in active edge-sites were uniformly distributed in the composite. Ti3C2Tx MXene and MoS2 act respectively as the electron reservoir and main sensitive material. The strong interfacial contact in different components facilitated the transfer of charge carriers and their spatial separation. Integrating the unique structural and electronic properties, the as-prepared Ti3C2Tx@TiO2@MoS2 sensor exhibited a remarkable gas sensing performance at room temperature (Ra/Rg = 55.16, 50 ppm NO2), which is 7.3, 3.8 and 2.1 times higher than that of pristine MoS2, TiO2@MoS2 and Ti3C2Tx@MoS2 composites, respectively. It also achieved ultrafast response time (1.8 s), more than 90% recoverability, low detection limit (23 ppb), dedicated selectivity and as long as eight-week stability.
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高影响因子
RSC Advances
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2020
·Vol. 10
·期 50
·29843-29854
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IF 3.119
Wenwen Zeng,Yingzhi Liu,Guoliang Chen,Haoran Zhan,Jun Mei,Nan Luo,Zhoukun He,Changyu Tang
Considering the harmfulness of nitrogen dioxide (NO2), it is important to develop NO2 sensors with high responses and low limits of detection. In this study, we synthesize a novel SnO–Sn3O4 heterostructure through a one-step solvothermal method, which is used for the first time as an NO2 sensor. The material exhibits three-dimensional flower-like microparticles assembled by two-dimensional nanosheets, in situ-formed SnO–Sn3O4 heterostructures, and large specific surface area. Gas sensing measurements show that the responses of the SnO–Sn3O4 heterostructure to 500 ppb NO2 are as high as 657.4 and 63.4 while its limits of detection are as low as 2.5 and 10 parts per billion at 75 °C and ambient temperature, respectively. In addition, the SnO–Sn3O4 heterostructure has an excellent selectivity to NO2, even if exposed to mixture gases containing interferential part with high concentration. The superior sensing properties can be attributed to the in situ formation of SnO–Sn3O4 p–n heterojunctions and large specific surface area. Therefore, the SnO–Sn3O4 heterostructure having excellent NO2 sensing performances is very promising for applications as an NO2 sensor or alarm operated at a low operating temperature.
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Ziying Wang,Yong Zhang,Sen Liu,Tong Zhang
A novel NO 2 gas sensor has been constructed using Ag nanoparticles-SnO 2 nanoparticles-reduced graphene oxide (AgNPs-SnO 2 -rGO) hybrids as sensing materials. AgNPs-SnO 2 -rGO hybrids were prepared by a two-step wet-chemical method. Firstly, SnO 2 -rGO hybrids were synthesized by hydrothermal treatment of aqueous dispersion of GO in the presence of SnCl 4 . Then, AgNPs-SnO 2 -rGO hybrids were obtained by in situ reduction of AgNO 3 on the surface of SnO 2 -rGO hybrids. The combined characterizations of UV–vis spectroscopy, X-ray diffraction (XRD), energy-dispersive X-ray spectrometer (EDX), elemental mapping, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and Raman spectra were used to investigate the structure of AgNPs-SnO 2 -rGO hybrids. Most importantly, the sensor based on AgNPs-SnO 2 -rGO hybrids exhibits good sensing performance for NO 2 sensing operating at room temperature . For example, the response time and recovery time of the sensor based on AgNPs-SnO 2 -rGO hybrids for 5 ppm NO 2 are 49 s and 339 s, which are much shorter than that of SnO 2 -rGO hybrids (415 s and 740 s), indicating that the sensing performances for NO 2 sensing at room temperature have been tremendously enhanced by introduction of AgNPs into SnO 2 -rGO hybrids.
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高影响因子
Molecular Catalysis
·
2017
·
IF 0
Shenghui Zhou,Kuiyi You,Hongxu Gao,Renjie Deng,Fangfang Zhao,Pingle Liu,Qiuhong Ai,He’an Luo
Mesoporous silica-immobilized FeCl 3 (FeCl 3 -SiO 2 ) as a highly efficient and reusable catalyst for the nitration of benzene with NO 2 has been successfully prepared in this work. The physical-chemical properties of samples were characterized by BET, XRD, TG-DTG, NH 3 -TPD, FT-IR, UV–vis DRS, Raman spectra and SEM. The characterization results indicated that FeCl 3 could be immobilized on the silica surface by bonding of FeCl 3 and silicon hydroxyl groups (Si OH) in forming the new Lewis acid sites of Si O Fe Cl 2 . The results showed the immobilized 15%FeCl 3 -SiO 2 catalyst exhibited excellent catalytic performance (99% of benzene conversion with 99% of selectivity to nitrobenzene) under the optimized reaction conditions. Furthermore, the durability of catalyst was remarkably improved by immobilizing. The present immobilized FeCl 3 -SiO 2 catalyst as a solid heterogeneous and stable catalyst could be conveniently recycled from the reaction media by filtering and remained highly catalytic performance even after five runs of recycling. The possible reaction pathway for the nitration of benzene with NO 2 over FeCl 3 -SiO 2 catalyst was suggested. This method provides a promising strategy for highly efficient preparation of nitro aromatic compounds by using NO 2 as nitration reagent, with the potential industrial applications.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Bing Song,Lixue Qi,Hongyi Wu,Yan Tong,Li Li,Muhammad Ikram,Keying Shi
The solvothermal and wet chemical method was developed to synthesized the p-n heterostructures of the thin porous Co 3 O 4 nanosheets with ZnO nanoparticles. The resulting products were analyzed by using various characterization techniques. The results possessed that the presence of a large number of oxygen defects on the surface of Co 3 O 4 -ZnO-7 favors enhancing the NO 2 adsorption. Correspondingly, the formation of p-n heterojunction and the large surface area of the material itself increased the carrier density and exposed more active sites, which collectively boost the sensing performance to NO 2 . The sensor showed a high response of 45.7 (S = R a /R g ) to 100 ppm NO 2 at room temperature (RT = 25 °C), with a short response/recovery time (1.3/25 s), and the lower detection limit of the sensor reached 30 ppb, with good selectivity, reproducibility and stability. This study will offer the opportunity to develop new sensors with high response and fast response-recovery to NO 2 at room temperature.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Haoran Peng,Jinhong Yang,Chong Lin,Lixue Qi,Li Li,Keying Shi
In this paper, MOFs-derived transition metal oxides (CuO NPs) were prepared by hydrothermal method combined with the stirring aging method using MOFs as sacrificial templates to realize the growth of CuO NPs octahedra on Ti 3 C 2 T X MXene nanosheets . Due to the synthesized binary heterostructured CuO NPs/Ti 3 C 2 T X MXene materials retain the unique MOFs structures, have abundant heterojunction interface, and owns the advantages of MOFs, such as large specific surface area, abundant active sites, high porosity, and effective oxidative chemical adsorption , the composite sensor shows very significant gas sensing capabilities for NO 2 gas with a gas-sensitive response and response time of 38.54 and 2.84 s, respectively, for 100 ppm NO 2 gas at RT. It achieves an impressively low detection limit of 30 ppb, maintaining stability for up to 10 weeks. This positions it as a highly sensitive NO 2 gas sensor with potential for room-temperature applications.
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高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Jie Li,Haoran Song,Tao Luo,Yan Cao,Linfeng Zhang,Qun Zhao,Zhanchao Li,Xuewei Hu,Junjie Gu,Senlin Tian
Exposure to ozone (O 3 ) and nitrogen dioxide (NO 2 ) are related to pulmonary dysfunctions and various lung diseases, but the underlying biochemical mechanisms remain uncertain. Herein, the effect of inhalable oxidizing gas pollutants on the pulmonary surfactant (PS, extracted from porcine lungs), a mixture of active lipids and proteins that plays an important role in maintaining normal respiratory mechanics , is investigated in terms of the interfacial chemistry using in-vitro experiments; and the oxidative stress induced by oxidizing gases in the simulated lung fluid (SLF) supplemented with the PS is explored. The results showed that O 3 and NO 2 individually increased the surface tension of the PS and reduced its foaming ability; this was accompanied by the surface pressure-area isotherms of the PS monolayers shifting toward lower molecular areas, with O 3 exhibiting more severe effects than NO 2 . Moreover, both O 3 and NO 2 produced reactive oxygen species (ROS) resulting in lipid peroxidation and protein damage to the PS. The formation of superoxide radicals (O 2 •– ) was correlated with the decomposition of O 3 and the reactions of O 3 and NO 2 with antioxidants in the SLF. These radicals, in the presence of antioxidants, led to the formation of hydrogen peroxide and hydroxyl radicals ( • OH). Additionally, the direct oxidation of unsaturated lipids by O 3 and NO 2 further caused an increase in the ROS content. This change in the ROS chemistry and increased • OH production tentatively explain how inhalable oxidizing gases lead to oxidative stress and adverse health effects. In summary, our results indicated that inhaled O 3 and NO 2 exposure can significantly alter the interfacial properties of the PS, oxidize its active ingredients, and induce ROS formation in the SLF. The results of this study provide a basis for the elucidation of the potential hazards of inhaled oxidizing gas pollutants in the human respiratory system.
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Zhidong Jin,Yue Mou,Jinbo Zhao,Fei Liu,Lin Liu,Dewen Zhao,Shiqiang Li,Fenglong Wang,Jiurong Liu,Chang Liu,Lili Wu
Clean, alternative energy sources, especially fuel cells, are gradually attracting global attentions while the produced toxic nitrogen dioxide (NO 2 ) is a greatly hazardous chemical impacting their energy efficiencies. Metal oxide semiconductors (MOS) hold significant promise as NO 2 sensors. However, intensive humidity interaction intensifies signal drifts and reliable response inhibitions under variable humidity conditions. In this study, we present a novel approach to address this issue by engineering in-situ F-doped NiO nanocomposites (NiOF x ) decorated on ZnO snowflakes achieved through decomposition modulation of ZnOHF precursors. The optimized NO 2 sensor demonstrates unparalleled humidity-independence across a wide operating temperature range with prime sensitivity, low detection limit and rapid response/recovery. Matrix algorithm is also implemented in highly precise NO 2 identification under complicated atmospheric and humid conditions. Mechanism studies based on temperature programmed desorption (TPD), quasi in-situ X-ray photoelectron spectroscopy ( Quasi in-situ XPS) reveal that F − dopants facilitate interfacial electron transferring and inhibit oxygen activity. In-situ diffuse reflectance infrared Fourier transform spectroscopy ( In-situ DRIFTS) demonstrates that hygroscopic NiO and electronegative F − synergistically obstruct hydroxyl adsorptions on sensing materials. The innovative approach offers a promising solution for enhancing moisture resistance of MOS sensors for real-time NO 2 concentration monitoring in fuel cells and provides valuable insights into anti-humidity mechanisms.
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高影响因子
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