SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yiqun Zhang,Chong Wang,Fengmin Liu,Xiaoying Sun,Xinhao Guo,Lianjing Zhao,Geyu Lu
In recent years, researchers have discovered that self-assembled monolayer functionalized surfaces could improve the gas-sensing performance of semiconductor oxide-based sensors. In the present work, metal-organic framework material ZIF-8 was selected as the self-sacrificial template, and then ZIF-8 materials were calcined at a high temperature to obtain ZnO nanoparticles . Subsequently, the surface of ZnO was modified to install a single layer of 3-aminopropyltriethoxysilane (APTES). In comparison with the pure ZnO-based sensor, the sensor based on 0.5 vol% APTES/ZnO had higher response to 2-butanone. The response has remarkably improved mainly due to APTES molecules capture electrons from the surface of ZnO to widen the electron depletion layer . In addition, the amine (–NH 2 ) group of the APTES monolayer enhanced the specific interaction between the sensing material and 2-butanone, thereby the performance of the sensor was improved. After functionalization with 0.5 vol% APTES, the lower detection limit of the sensor reached as low as 200 ppb, while that of the pure ZnO-based sensor was 500 ppb.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
ANALYTICAL LETTERS
·
2024
·
IF 1.6
Yan Chen,Yiwei Sun,Shuyan Qi,Li Zhang,Ming Yin,Xiuxia Wei,Yuting Luo,Dongpo Xu
Yolk-shell SnO2 mesoporous double-layer nanotubes were synthesized in one-step by single nozzle electrospinning. Compared with the traditional electrospinning using polyvinylpyrrolidone (PVP) as the precursor polymer to obtain the single nanotube material, two PVPs (PVPK88-96 and PVPK23-27) with different molecular weights in solution coupled with Sn2+ easily form the core-shell structure nanofiber through phase separation. The yolk-shell double-layer SnO2 nanotubes were obtained after calcination at 600 °C for 2 h. The yolk-shell SnO2 mesoporous double-layer nanotube is a promising sensing material toward 3-hydroxy-2-butanone as it shows high sensitivity, cycling stability, and selectivity. Moreover, the response and recovery times of the yolk-shell SnO2 mesoporous double-layer nanotubes toward 1 ppm 3-hydroxy-2-butanone were 122 s and 117 s.
研究领域:
材料科学
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化学传感器
·
纳米技术
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DOI
高影响因子
ACS Sensors
·
2023
·
IF 8.9
Siqi Xie,Cheng Zhao,Jiabin Shen,Jing Wei,Haiquan Liu,Yingjie Pan,Yong Zhao,Yongheng Zhu
Listeria monocytogenes, which is abundant in environment, can lead to many kinds of serious illnesses and even death. Nowadays, indirectly detecting the metabolite biomarker of L. monocytogenes, 3-hydroxy-2-butanone, has been verified to be an effective way to evaluate the contamination of L. monocytogenes. However, this detection approach is still limited by sensitivity, selectivity, and ppb-level detection limit. Herein, low-cost and highly sensitive and selective 3-hydroxy-2-butanone sensors have been proposed based on the bimetallic AuPd decorated hierarchical flower-like WO3 nanospheres. Notably, the 1.0 wt % AuPd-WO3 based sensors displayed the highest sensitivity (Ra/Rg = 84 @ 1 ppm) at 250 °C. In addition, the sensors showed outstanding selectivity, rapid response/recovery (8/4 s @ 10 ppm), and low detection limit (100 ppb). Furthermore, the evaluation of L. monocytogenes with high sensitivity and specificity has been achieved using 1.0 wt % AuPd-WO3 based sensors. Such a marvelous sensing performance benefits from the synergistic effect of bimetallic AuPd nanoparticles, which lead to thicker electron depletion layer and increased adsorbed oxygen species. Meanwhile, the unique hierarchical nanostructure of the flower-like WO3 nanospheres benefits the gas-sensing performance. The AuPd-WO3 nanosphere-based sensors exhibit a particular and highly selective method to detect 3-hydroxy-2-butanone, foreseeing a feasible route for the rapid and nondestructive evaluation of foodborne pathogens.
研究领域:
材料科学
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生物医学工程
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环境监测
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产品关联
DOI
PubMed
高影响因子
CyTA-Journal of Food
·
2025
·
IF 1.7
Han Zhao,Xiaohui Duan,Siqi Xie,Lili Cheng,Fei Wang,Wenjuan Xu,Yaolei Zhang,Weiyi Zhang,Cheng Zhao
Listeria monocytogenes is a foodborne pathogenic bacterium that can survive under a wide range of temperature and pH conditions, with a mortality rate of up to 20% −30%. One emerging and validated method of indirectly assessing Listeria monocytogenes in food is detecting 3-hydroxy-2-butanone gas. In this study, WO3 nanoflowers (a diameter of 2.8 µm) and two different hierarchical structures of WO3 were successfully synthesized. XRD, BET, SEM, and TEM were applied to characterize their morphology, microstructure, catalytic structure, and specific surface area. For assessing their gas sensing performances toward 3-hydroxy-2-butanone, a series of gas sensitivity indicators were purposefully measured. The results indicated that WO3 nanoflowers had the best gas sensing performance including high sensitivity (81 @ 20 ppm), rapid response-recovery time (4 s/9 s), low LOD (1 ppm) and good stability. Moreover, by analysing the various characterization results of these materials, the sensitivity mechanism was explained in detail as well.
研究领域:
微生物学
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材料科学
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食品科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2015
·
IF 2.337
Jun Mei,Jianyong Mao,Zhirong Chen,Shenfeng Yuan,Haoran Li,Hong Yin
The aim of this paper is to explore the reason for the catalyst-free phenomenon of synthesizing 4-hydroxy-2-butanone from formaldehyde and acetone under supercritical conditions and in high-temperature liquid-phase. Experiments were conducted in a tubular flow-type reactor at temperatures between 230 and 270 °C for residence times between 0.5 and 8 min. Under these conditions, a small amount of formic acid appeared via noncatalytic self-disproportionation of formaldehyde. The generated formic acid proved to play a role as catalyst in main reactions. A mechanism-based detailed chemical kinetics model for main reactions was suggested to assess the effect of temperature. This model applied well both under supercritical conditions and in high-temperature liquid-phase. The activation energies for forming and dehydration of 4-hydroxy-2-butanone were 97.5±3.5 kJ/mol and 120.6±5.8 kJ/mol, respectively.
研究领域:
化学工程
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物理化学
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产品关联
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2021
·
IF 4.354
Qingqiang Tian,Shasha Xu,Chiying Zhang,Xinyi Liu,Xiangwei Wu,Yahui Li
Herein, an interesting palladium-catalyzed procedure for the direct carbonylative thiomethylation of aromatic amine derivatives with 4-methylthio-2-butanone is developed. Using 4-methylthio-2-butanone as (methylthio) transfer agent, a variety of corresponding thioesters are obtained with moderate to good yields under base-free condition. In addition, good functional group tolerance can be observed.
研究领域:
有机化学
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合成化学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
·
IF 2
Danru Xu,Bowen Tan,Hui Shi,Miaoli Hao,Yulei Guan,Jingjun Liu
Glycerol carbonate prepared by transesterification is a value-added glycerol derivative that can be used as a solvent, electrolyte, and polymer monomer. Due to the high boiling points of glycerol and glycerol carbonate, their separation by distillation is energy-intensive. To evaluate the feasibility of extractive separation of glycerol carbonate with glycerol, ethyl acetate and 2-butanone + benzene mixture were selected as the extractants, and the corresponding liquid–liquid equilibrium data were measured at 303.2, 313.2, and 323.2 K under atmospheric pressure. While ethyl acetate provided high extractive selectivity, the distribution coefficient of glycerol carbonate in it was less than one. The 2-butanone + benzene mixture with suitable ratios resulted in more feasible and balanced distribution coefficients and selectivities. The NRTL model was used to correlate the equilibrium data to estimate the interaction parameters, and the quality of the obtained parameters was validated. The NRTL model with the regressed parameters can reproduce the phase equilibrium trend of all of the studied systems.
研究领域:
化学工程
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分离技术
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
·
IF 4.2
Zhangyi Gao,Yue Tian,Ping Liu,Linjing Jiang,Lili Gao,Le Du,Jiqin Zhu
3,3-Dimethyl-2-butyl ketone (pinacolone) has received attention for its important role in organic synthesis. However, existing techniques to synthesize pinacolone come with low yields, which are detrimental to the subsequent purification and economic benefits of enterprises. In this study, a scale-up method based on mixing enhancement was developed to improve the synthesis of pinacolone from isoamylene without significant scaling-up effects. Reaction conditions such as temperature, reaction time, and molar ratios were systematically investigated in a microchannel reactor and a batch reactor. A maximum yield of 91% was obtained under batch conditions. On the basis of the proposed scale-up method, an 87% yield was achieved after a 50-fold volume scale-up. A simplified kinetic model (0.56 order with respect to 2-chloro-2-methylbutane) was also established.
研究领域:
有机化学
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化工工程
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产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 8
·719
·
IF 4.4
Xueyan Li,Zeyi Wu,Xiangyu Song,Denghua Li,Jiajia Liu,Jiatao Zhang
Nowadays, metal oxide semiconductor gas sensors have diverse applications ranging from human health to smart agriculture with the development of Internet of Things (IoT) technologies. However, high operating temperatures and an unsatisfactory detection capability (high sensitivity, fast response/recovery speed, etc.) hinder their integration into the IoT. Herein, a ternary heterostructure was prepared by decorating WO3nanoplates with Au and SnO2nanoparticles through a facial photochemical deposition method. This was employed as a sensing material for 3-hydroxy-2-butanone (3H-2B), a biomarker ofListeria monocytogenes. These Au/SnO2–WO3nanoplate-based sensors exhibited an excellent response (Ra/Rg= 662) to 25 ppm 3H-2B, which was 24 times higher than that of pure WO3nanoplates at 140 °C. Moreover, the 3H-2B sensor showed an ultrafast response and recovery speed to 25 ppm 3H-2B as well as high selectivity. These excellent sensing performances could be attributed to the rich Au/SnO2–WO3active interfaces and the excellent transport of carriers in nanoplates. Furthermore, a wireless portable gas sensor equipped with the Au/SnO2–WO3nanoplates was assembled, which was tested using 3H-2B with known concentrations to study the possibilities of real-time gas monitoring in food quality and safety.
研究领域:
传感器技术
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食品安全
·
纳米材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Ding Wang,Lifeng Deng,Haijie Cai,Jialin Yang,Liping Bao,Yongheng Zhu,Xianying Wang
As a foodborne bacterium, Listeria monocytogenes (LM) can cause serious diseases and even death to weak people. 3-Hydroxy-2-butanone (3H-2B) has been proven to be a biomarker for exhalation of LM. Detection of 3H-2B is a fast and effective method for determining whether the food is infected. Herein, we present an excellent 3H-2B gas sensor based on bimetallic PtCu nanocrystal modified WO3 hollow spheres. The structure and morphology of the PtCu/WO3 were characterized, and their gas sensitivities were measured by a static testing method. The results showed that the sensor response of WO3 hollow spheres was enhanced by about 15 times after modification with bimetallic PtCu nanocrystal. The maximum response value of the PtCu/WO3 sensor to 10 ppm 3H-2B is as high as 221.2 at 110 °C. In addition, the PtCu/WO3 sensor also exhibited good selectivity to 3H-2B, fast response/recovery time (9 s/28 s), and low limit of detection (LOD < 0.5 ppm). Furthermore, the sensitivity mechanism was studied by monitoring the reaction products by gas chromatography–mass spectrometry. The excellent gas-sensing performance can be attributed to the synergy between PtCu and WO3, including the unique spillover effect of O2 on PtCu nanoparticles, the regulated depletion layer by p-type CuxO to n-type WO3, and their selective catalysis to 3H-2B. Hence, this work offers the rational design and synthesis of highly efficient sensitive materials for the detection of LM for food security.
研究领域:
材料科学
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化学传感器
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食品安全
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xing-Yu Wang,Ping-Ping Liu,Hai-Jie Cai,Miao-Miao Li,Chun-Hui Deng,Yong Zhao,Zhao-Huan Zhang,Yong-Heng Zhu
Biomarkers detection of foodborne pathogens through gas sensors provides a promising method to ensure food safety. However, rapidly and accurately identifying ultra-low concentration bacterial biomarkers is still an urgent task. In this study, PdRh bimetallic-loaded α-Fe 2 O 3 nanospindles with sufficient exposed surface and high surface activity are designed to achieve sensitive detection of the Listeria monocytogene biomarker s : 3-hydroxy-2-butanone. α-Fe 2 O 3 nanospindles with high exposure surfaces were prepared by modulating the axial diameter ratio. Then PdRh bimetals were uniformly introduced to regulate the surface activity of α-Fe 2 O 3 nanospindles. Compared to pure Fe 2 O 3 , the result 1.5 wt% PdRh-Fe 2 O 3 nanospindle exhibits significantly improved sensitivity and selectivity in detecting 3-hydroxy-2-butanone, characterized by a reduced operating temperature from 240°C to 150 °C, high sensitivity (R a /R g = 148.4, 50 ppm), impressive response/recovery time (7/10 s), low detection limit (200 ppb), notable selectivity, and great stability over a test period exceeding 30 days. Mechanism studies through ex/in-situ characterization and density functional theory calculations (DFT) reveal that the dramatic sensing performance advancement is mainly due to the morphology optimization, bimetallic activation, and their synergistic effects, leading to the increased surface active species, enhanced oxygen mobility, and the reduced activation energy. Furthermore, high-sensitivity detection of Listeria monocytogenes in actual samples is also achieved by using 1.5 wt% PdRh-Fe 2 O 3 nanoneedles-based sensor, indicating its significant potential for non-destructive testing applications in the food industry and opening new avenues for the rapid detection of Listeria monocytogenes .
研究领域:
材料科学
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食品科学
·
生物医学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yan-nan Wang,Jingfeng Li,Zhiqiang Yang,Zhenyu Yuan,Jin Li,Fanli Meng
In this study, a hollow malposition structure (HMS) optical fiber 2-butanone gas sensor based on double-layer WO 3 @CQDs porous film is proposed, and realizes the ppb detection of 2-butanone gas at room temperature. The HMS can excite the evanescent field and sense the gas adsorption on the fiber surface. The experimental results show sensitivity of 3.09 pm/ppm for this HMS optical fiber gas sensor based on double-layered WO 3 @CQDs porous film, which is 6.05 times higher than that of the sensor coated with single-layer WO 3 @CQDs porous film. In addition, a limit of detection (LOD) reaches 500 ppb. The response time is 11.7 s and the recovery time is 5.72 s. Density functional theory (DFT) results show that the modification of CQDs improves the adsorption capacity of WO 3 @CQDs for 2-butanone gas molecules and changes the refractive index of the material. The sensor has the advantages of small volume, high sensitivity and a low LOD, which is of great significance for the detection of trace 2-butanone gas.
研究领域:
材料科学
·
光学传感
·
气体检测
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DOI
高影响因子
危险品化学品经营许可证（带存储）