INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
·
IF 3.764
Peng Xu,Zhihao Jin,Tianyu Zhang,Xianfu Chen,Minghui Qiu,Yiqun Fan
The composition of ship exhaust gas is complex and a great challenge to the long-term stability of a membrane contactor. In this work, a facile method for constructing a functional surface on an alumina membrane substrate was realized for antiparticle or antidust adhesion in the process of exhaust-gas desulfurization. Polytetrafluoroethylene (PTFE) nanoparticles were dispersed, coated, and thermally sintered on the outer surface of an alumina membrane substrate to obtain a robust defect-free layer that exhibited hydrophobicity and a low friction coefficient. The PTFE coating served as a protective layer with low surface energy, low surface roughness, and a low coefficient of friction, which reduced the adhesion of foulants and facilitated their release. Meanwhile, the porous alumina substrate, wetted by an ammonia solution, still achieved excellent membrane absorption performance for SO2. In desulfurization and antiparticle testing, the PTFE-coated membrane not only showed the same absorption performance as the original membrane but also demonstrated greater resistance to particle adhesion in a dusty environment throughout 12 h of testing. These results indicated that the designed membrane can be utilized for gas absorption in a dusty environment.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
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2021
·Vol. 36
·期 12
·125022
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IF 2.352
Yuchang Liu,Hongjie Liu,Anjie Hu,Yingmei Wei,Wenchao Ou,Xianwang Deng,Shaopeng Wang,Kefu Yu
The quest to develop inexpensive chemical sensing materials that are energy-efficient, portable, and with efficient performance lies at the center of next-generation sensor development. Owing to their low cost, easy preparation, high response, and smooth integration with electronic circuits, metal oxide semiconductors have received particular attention. Yet, metal oxide semiconductor based sensors often suffer from high power consumption due to their high operating temperature, which hinders them from practical applications. To solve this problem, herein, we proposed ultrathin sub-4 nm SnO2 films synthesized by a facile tunable hydrothermal method. Benefiting immensely from its two-dimensional anisotropic nature, the proposed SnO2 ultra-thin film exhibits a large specific area of 94.41 m2 g−1 and possesses surface oxygen vacancies. The obtained sample was practically applied as a gas sensor; the results indicate that the ultra-thin SnO2 film based sensor exhibits the highest sensitivity to triethylamine (19.2 at 100 ppm), outstanding repeatability, and excellent sensing selectivity at a low working temperature of 150 °C.
研究领域:
材料科学
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化学传感器
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Ying Cheng,Shumaila Razzaque,Zhen Zhan,Bien Tan
Fabrication of functionalized hypercrosslinked polymers (HCPs) with high specific surface area has gained significant research interest and their utilization for gas storage is still a trending research area. Considering the significance of solvent knitting strategy in construction of remarkably high surface area HCPs, we report fabrication of cyano-functional HCPs via one step Friedel-Crafts reaction. The series of HCPs were obtained by copolymerizing the rigid monomer TPB with a 2-napthonitrile in different molar ratio. The resultant co-polymerized polymers contained a plenty of nitrile functional groups and possessed high BET surface area. Among the series of such HCPs, HCP-TPB-CN-3:1 showed the highest BET surface area up to 2017 m 2 g −1 . These HCPs have enriched nitrogen in their pore walls that enhance the facile interaction of CO 2 to achieve higher capture capacity of 21.3 wt% at 273 K. Moreover, the HCP-TPB-CN was explored for CH 4 storage and showed absolute adsorption capacity of 0.35 g/g at 273 K, 80 bar, which is comparable with the porous polymers reported so far. These results highlight the significance of solvent knitting strategy and broaden the scope of HCPs for versatile industrial applications.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
Frontiers of Environmental Science & Engineering
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2013
·Vol. 8
·期 2
·162-168
·
IF 0.886
Xie Jiangkun,Yan Naiqiang,Liu Fei,Qu Zan,Yang Shijian,Liu Ping
Porous ZIF-7 with the sodalite (SOD) cage structure (ZIF, Zeolitic imidazolate framework) were synthesized by the solvothermal method. Synthesized material was characterized by powder X-ray diffraction (PXRD), thermal gravity (TG), scanning electron microscopy (SEM) and N 2 adsorption analysis. ZIF-8 with the SOD structure and a little larger pore window was synthesized in a similar way and was characterized for comparisons. Thermal stability and structural stability of ZIF-7 were tested through PXRD analysis, and the capability of the material for CO 2 capture from simulated flue gas was investigated through physical adsorption method. The results showed that CO 2 adsorption capacity on ZIF-7 was about 48 mL·g −1 while the capacity on ZIF-8 was about 18 mg·g −1 (at 12°C and 0.98 P / P
0 relative pressure). Furthermore, the impact of flue gas components on adsorption capacity of ZIF-7 and the selectivity of CO 2 against N 2 on ZIF-7 was also investigated in this work.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Donghui Li,Dan Han,Yi Chen,Yutao Hong,Qi Duan,Hongtao Wang,Xiuli He,Li Zhao,Weidong Wang,Shengbo Sang
In this work, we developed a high-performance NH 3 sensor based on GaN/rGO nanocomposites via a low-cost solvothermal method and subsequent nitridation process. The morphological, structural, and chemical compositions were investigated to demonstrate that GaN and rGO were coupled together by interfacial modulation, and the GaN/rGO heterostructure chemical bonds are successfully formed. Gas-sensing performance test results show that the fabricated GaN/rGO (2.2 wt%) NH 3 sensor exhibited a high response value (92%), fast response time (11 s), and low limit of detection (500 ppb) at room temperature . In addition, reproducibility, humidity, and long-term stability tests of the GaN/rGO sensor were also conducted in this work. The enhancement sensing mechanisms are attributed to the large specific surface area, the excellent conductivity of rGO, and resistance modulation effect of the heterojunction potential. Hence, the GaN/rGO gas sensor can be regarded as a promising sensing solution for atmospheric and exhaled NH 3 detection at room temperature.
研究领域:
材料科学
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传感器技术
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化学工程
✓ 已验证
DOI
高影响因子
Journal of Essential Oil Bearing Plants
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2017
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IF 0.493
Chang Xu,Zhengang Liang,Dan Tang,Tongjie Xiao,Makoto Tsunoda,Yingxia Zhang,Lini Zhao,Shiming Deng,Yanting Song
In this paper, the volatile components extracted from guava leaves by steam distillation (SD) was investigated and comprehensively analyzed for the first time. To obtain more sensitive and accurate analysis, the sample preparation procedure for Gas Chromatography-Mass Spectrometry (GC-MS) analysis of the volatile compounds was investigated and then 27 compounds were identified in the samples obtained by SD method. The volatile components in guava leaf were made up largely of sesquiterpenoids, including α-cubebene, caryophyllene, aromadendrene, α-cadinene, and calamenene. The results indicated that the volatile components from the guava leaves extracted by SD technology was quite different, and the research provided comprehensive information for the volatile compounds in the guava leaves.
研究领域:
植物化学
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分析化学
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2019
·
IF 2.722
Xiaoxue Lian,Yan Li,Junwu Zhu,Yunling Zou,Dongmin An,Qiong Wang
Stannic oxide nanoparticles with the different Au decorating contents are prepared by a simple hydrothermal method in this paper. The products are characterized by X-ray diffraction (XRD), energy dispersive spectrum (EDS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The XRD patterns reveal that all the products are tetragonal phase of rutile SnO 2 crystal structure. The gas-sensing performance of the Au-decorated SnO 2 nanoparticles for volatile organic compounds (VOCs) are studied. At its optimal operation temperature of 240 o C, the sensing properties of the Au-decorated SnO 2 nanoparticles to n-buthanol gas show a good gas sensing performances as low detection limit (1ppm), good selectivity and good repeatability. The highest sensing response of 6.0 at. % Au-decorated SnO 2 nanoparticles (251.23 for 200 ppm to n-buthanol) is over 21 times higher than that of pure SnO 2 (11.5). All results prove the potential of using Au-decorated SnO 2 for n-buthanol gas detection.
研究领域:
材料科学
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化学传感器
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
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2017
·
IF 3.473
Liangwei Ma,Chengpeng Li,Qiufeng Liang,Sheng Wang,Derong Cao
We designed and synthesized three new tetraphenylethene (TPE) derivatives ( CZ-TPE , DMA-TPE and TPA-TPE ) modified with different electron rich group (carbazole, N, N -dimethylaniline and triphenylamine segments, respectively) by Knoevenagel condensation reaction. The chemical structures of these compounds are identified by NMR, MS and IR. The absorption and emission of these dyes were investigated by UV-Vis and fluorescence spectroscopy , respectively. The results shown three dyes exhibited evident aggregation-induced emission (AIE) or aggregation-induced emission enhancement (AIEE) properties with wavelength tunable emission. Their emission color can be tuned from green to orange in tetrahydrofuran/H 2 O solutions, from green to red in solid state or pure tetrahydrofuran solutions. In addition, the solution or film of TPA-TPE shown results in distinct fluorescence from “ON” to “Off” observation as well as color change from orange yellow to colorless by naked eyes when the addition of toxic Cl 2 gas, which can be used as an excellent dual chromo- and fluorogenic signal changes that is well suited for monitoring Cl 2 gas in solution, or solid film, conveniently. These results indicate TPA-TPE is a promising candidate chemosensor for the detection of Cl 2 gas.
研究领域:
化学
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材料科学
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分析化学
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环境科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 8
·1163
·
IF 4.034
Xi-Tao Yin,Davoud Dastan,Fa-Yu Wu,Jing Li
Here SnO2/LaFeO3−XNXcomposite was fabricated using a wet chemical method and was applied to pollutants degradation and gas sensing for the first time. The composite exhibits high performance for photocatalytic degradation of Rhodamine B (RhB) dye and selectivity sensing of various gases. On the basis of the completed experiments, the improved RhB degradation and selective gas sensing performance resulted from the extended optical absorption via N2incorporated surface states and enhanced charge separation via coupling SnO2. Using the scavengers trapping experiments, the superoxide radical (O2•−) was investigated as the major scavenger involved in the degradation of RhB over SnO2/LaFeO3−XNXcomposite. In this paper, the probable reaction steps involved in the RhB dye degradation over SnO2/LaFeO3−XNXcomposite are proposed. This work will provide reasonable strategies to fabricate LaFeO3-based proficient and stable catalysts for environmental purification. In addition, the result of the selectivity of gas performance is also presented.Keywords:LaFeO3−XNX;RhB degradation;charge separation;gas sensing
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
Food Packaging and Shelf Life
·
2025
·
IF 10.6
Haiyu Du,Xintang Liu,Chunyu Zhou,Xiangdong Yun,Zhengfeng Ma,Zhu Zhu,Yongqiang Wen
The quality deterioration of perishable produce is accelerated by the elevated temperature and imbalanced gas composition. Herein, a multifunctional composite film (Eugenol@PNPMs@HACC-g-PAA, EP@HP) integrating temperature-responsive antimicrobial and gas regulation was developed for smart and precise freshness preservation. The film achieved an exceptional CO 2 /O 2 selective permeability ratio of 5.58 gas at 25°C by introducing eugenol-loaded aminated porous poly(lactic acid) microspheres into the polymer matrix. The phase transition temperature was precisely controlled at 25 ℃ by adjusting the molar ratio of quaternary ammonium groups to acrylic monomers, which realized the responsive antimicrobial release under elevated temperatures. Antimicrobial tests showed that EP@HP possessed more than 80 % antibacterial properties against key postharvest pathogens ( Escherichia coli , Staphylococcus aureus , and Botrytis cinerea ). Furthermore, the film exhibited antifogging properties, UV-blocking properties, mechanical strength, and biocompatibility. More importantly, storage tests demonstrated that the film extended the shelf life of bananas and kiwifruit by 3 and 9 days, respectively, through synergistic gas regulation and microbial suppression. This work presents a multifunctional smart film that combined autonomous gas regulation with on-demand antimicrobial release, offering significant potential for industrial applications according to its convenient fabrication process and effective preservation performance.
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产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2022
·
IF 5.204
Xiaoqin Zhang,Jinggang Wang,Qianfeng Wang,Yunxiao Dong,Jin Zhu
Lacking available eco-friendly aliphatic-aromatic copolyesters with balanced mechanical properties, gas barrier properties and biodegradability is a foremost challenge in the field of degradable materials. 2,5-thiophenedicarboxylic acid (2,5-TDCA) as a new aromatic monomer with five-membered aromatic-ring can be synthesized from the renewable glucaric or muconic acid. In this work, a series of poly(butylene succinate-co-butylene 2,5-thiophenedicarboxylate) (PBSTh) copolyesters with TDCA units ranging from 10 to 80 mol% were synthesized by melt polycondensation. The results of 1 H-NMR, 13 C-NMR and GPC revealed that the obtained random copolyesters possessed high number-average molecular weight from 54,800 to 88,600 g/mol. The copolymerized TDCA units was beneficial to improve the thermal stability, and T d,5% in N 2 rose from 324°C of poly(butylene succinate) (PBS) to 344∼371°C of PBSThs. The mechanical properties of PBSThs were good with tensile modulus >29 MPa, tensile strength >11.4 MPa and elongation at break >523%, respectively. PBSThs showed better gas barrier properties than the well-known poly(butylene adipate-co-butylene terephthalate) (PBAT) and the BIFps of CO 2 and O 2 were 5.1∼60.2 times and 5.1∼32.0 times to PBAT, respectively. Also, the excellent biodegradability was proved both in enzymatic and compost environments and PBSThs have higher degradation rates than PBAT when the content of TDCA unit is lower than 60 mol%. In conclusion, the investigation of PBSThs has shown that the incorporation of 2,5-TDCA is effective in enhancing the overall properties of PBS and PBSTh can be a promising candidate in the field of biodegradable polymers.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
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
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）