Journal of the Taiwan Institute of Chemical Engineers
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2021
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IF 5.876
Anqi Sun,Ying Wu,Zhenjiang He,Peng Bai,Jiafei Lyu,Xianghai Guo
The flexible metal-organic framework MIL-53(Cr) has been demonstrated to be an efficient adsorbent for liquid phase adsorption and separation, while the effect of this attractive “breathing effect” on its performance remains uncertain. In this research, by increasing the amount of introduced water, MIL-53(Cr) first shrank into a narrow pore form through bound water and then reopened due to the introduction of free water. Using MIL-53(Cr) with diverse amounts of water as an adsorbent, the liquid-phase adsorption and separation of C8 aromatics, including o -xylene (OX), p -xylene (PX), m -xylene (MX) and ethylbenzene (EB), was manipulated by the pre-adsorbed water in MIL-53(Cr). Pre-adsorbing water in MIL-53(Cr) induced a preference reversal between MX and PX, where dry samples preferentially adsorbed MX, while high-water-addition samples preferred PX instead. In addition, the reopened MIL-53(Cr) with high water addition hardly adsorbed EB, thereby increasing the selectivity of xylene isomers to EB. A longer equilibrium time was observed on MIL-53(Cr) with high water addition, during which the adsorption preference shifted from OX to MX to PX. Further molecular simulation provided a microscopic explanation that water molecules in the pores tended to package around MX and EB, hindering their interaction with frameworks or other adsorbates.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
Journal of Materials Chemistry C
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2025
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IF 5.1
Yiming Gou,Zejun Cao,Chunhua Ge,Rui Liu,Han Xu,Fengqi Li,Xiangdong Zhang
Research on fluorescent composites based on phase change materials is currently a hot topic. In this study, we reported the synthesis of N,N’-bis(1-octylheptadecyl)-3,4,9,10-perylenetetracarboxydiimide (PDI-C8) from perylene-3,4,9,10-tetracarboxylic dianhydride (PDI) and heptadecyl-9-amine. Two types of PDI-C8 paraffin fluorescent materials were developed: PDI-C8/paraffin composites and PDI-C8 paraffin emulsion via the Phase Inversion Composition (PIC) method. The structure, composition, and fluorescence properties of PDI-C8 were studied using NMR, MS, FT-IR, UV and FL, respectively. The photothermal conversion performance of the PDI-C8/paraffin composites was investigated. Results showed improved photothermal conversion with increased PDI-C8 contents, suggesting potential applications in solar thermal energy utilization and storage. The two fluorescent materials were characterized using DSC and FL. The photoluminescence phenomena of PDI-C8 paraffin fluorescent materials with different PDI-C8 contents all exhibit temperature-controlled characteristics. Based on the properties, a fluorescent thermometric paper was developed. Moreover, the utility of the two fluorescent materials extends to fields like anti-counterfeiting identification and encrypted writing.
研究领域:
材料科学
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光学
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能源科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2018
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IF 6.14
Jilei Xu,Lin Li,Guangyi Li,Aiqin Wang,Yu Cong,Xiaodong Wang,Ning Li
For the first time, proline-based ionic liquids were reported as effective catalysts for the aldol condensation of angelica lactone with furfural, two platform compounds which were obtained by the hydrolysis–dehydration reactions of cellulose and hemicellulose. Among the investigated catalysts, a renewable ionic liquid that was prepared with biomass-derived choline and l-proline (denoted as ChPro) demonstrated the highest activity. Over the ChPro catalyst, 86% carbon yield of C10 oxygenate was obtained under mild conditions (353 K, 1 h). After being hydrogenated over the Pd/C catalyst and hydrodeoxygenated under the promotion of the Pd–Cu/SiO2, the aldol condensation product of angelica lactone with furfural was transmuted into C8–C10 alkanes within the carbon chain range of jet fuel and diesel. Compared with the Cu/SiO2 and Pd/SiO2, the bimetallic Pd–Cu/SiO2 demonstrated higher activity and/or selectivity to C8–C10 alkanes for the hydrodeoxygenation of hydrogenated aldol condensation product. According to the characterizations of X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and CO Fourier transform infrared, the excellent catalytic performance of Pd–Cu/SiO2 can be comprehended by the Pd–Cu alloy particles formed during the preparation of this catalyst.
研究领域:
生物质化学
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催化化学
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可再生能源
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DOI
高影响因子
JOURNAL OF POROUS MATERIALS
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2024
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IF 2.5
Shi Xiang,Wang Ke,Wang Minxin,Yuan Hong
UiO-66 specimens having different acetic acid/ZrCl 4 molar ratios were prepared and pyrolyzed to ZrO 2 as supports for Pt and Ni, intended to catalyze the decarboxylation of oleic acid. Brunauer-Emmett-Teller surface area analyses, NH 3 temperature-programmed desorption and pyridine adsorption infrared spectroscopy showed that the material made using an acetic acid/ZrCl 4 molar ratio of 100 (ZrO 2 -100) had the largest specific surface area, acid amount and acid strength values. The yield of C 8 -C 17 alkanes obtained from Ni/ZrO 2 -100 exceeded that provided by Pt/ZrO 2 -100 because the latter possessed more acidic sites than the former, which excessively cracked long-chain hydrocarbons. The 1 wt% Ni/ZrO 2 -100 catalyst showed the best catalytic performance, with 96.4% conversion of oleic acid and an 80.6% yield of C 8 -C 17 alkanes after 4 h at 340 °C under a CO 2 atmosphere at a pressure of 18 bar. The conversion of oleic acid remained almost unchanged after 4 reuses of this catalyst whereas the yield of C 8 -C 17 alkanes decreased to 66.7%. This result is attributed to a loss of acidic sites and an increase in carbon build-up.
研究领域:
化学工程
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催化科学
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DOI
高影响因子
Results in Physics
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2020
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IF 4.019
Yuan Zhao,Xiaoliang Liu,Guangdi Feng,Lu Lyu,Lin Li,Shitan Wang,Jie Jiang,Youzhen Li,Dongmei Niu,Haipeng Xie,Yongli Gao
The modification of C 60 nano-interlayers on the organic field-effect transistors (OFETs) based on 2,7-diocty[1]benzothieno-[3,2-b]benzothiophene (C8-BTBT)/SiO 2 was addressed at both the electronic structure and device level. It is observed that a band bending occurs in C8-BTBT layer with the insertion of C 60 , which induces a strong hole accumulation at the interface region, facilitating the formation of high concentration conducting channel when the interface is incorporated into OFETs. The strong acceptor C 60 may cause charge transfer from the trap states in C8-BTBT, resulting in a field-effect operation with decreased threshold voltage. However, the increasing disorder in C8-BTBT induced by the C 60 nano-interlayer may reduce the hole mobility at the C8-BTBT/SiO 2 interface region and change the growth model of C8-BTBT. In addition, as confirmed by the transfer characteristic of the OFETs, the thin C 60 insertion layer isn’t continuous enough to induce an ambipolar transport behavior despite its high mobility. The competition between the two opposite effects results in compromised performance in such OFETs. The device performance parameters deteriorate generally with increasing the C 60 nano-interlayer thickness. So, it is inferred that the C 60 interlayer alone cannot improve the performance of the C8-BTBT/SiO 2 -based OFETs without further optimization. Importantly, the device performance exhibits an abnormal improvement with a 6 nm C 60 interlayer, which might be ascribed to a higher energy level shift of C8-BTBT caused by a quasi-continuous C 60 film at this thickness.
研究领域:
材料科学
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电子工程
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纳米技术
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DOI
高影响因子
Journal of Materials Chemistry C
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2017
·Vol. 5
·期 40
·10652-10659
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IF 5.256
Weiyao Wei,Cheng Yang,Jiaying Mai,Yanfen Gong,Longsen Yan,Kai Zhao,Honglong Ning,Sujuan Wu,Jinwei Gao,Xingsen Gao,Guofu Zhou,Xubing Lu,J.-M. Liu
The interface between the dielectric and the active layer plays a critical role on the performance of solution-processed organic thin-film transistors (OTFTs). However, the creation of a high quality interface still represents a considerable challenge because it requires the balancing of surface energy with surface wettability. This study shows that UV-ozone treatment is very effective to obtain a high quality interface between a dielectric SiO2 film and a solution-processed 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) semiconductor film. After only one minute UV-ozone exposure on the SiO2 surface, the hole mobility at room temperature reaches 6.50 cm2 (V s)−1 for a solution-processed C8-BTBT-OTFT. UV-ozone treatment can not only modify both surface energy and surface wettability but also clean the SiO2 surface. Consequently, it changes the degree of ordered growth, grain sizes, and grain boundaries in C8-BTBT films. Hence, UV-ozone treatment is a simple and efficient way to produce the desirable interface qualities that enable the highly ordered growth of C8-BTBT films. Using this method it is also very promising to produce a high-quality interface between the dielectric film and other solution-processed organic semiconductors to fabricate other high-performance OTFT applications.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
AICHE JOURNAL
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2021
·Vol. 67
·期 8
·e17252
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IF 3.993
Hu Li,Zisheng Zhang,Guanlun Sun,Suli Liu,Liangcheng An,Xingang Li,Hong Li,Xin Gao
As an attractive alternative technology for the separation of long chain olefin and paraffin, a novel silver-based deep eutectic solvent (Ag-DES) was prepared and utilized for 1-octene/n-octane separations. Comprehensive reactive extraction separation experiments were performed to highlight the Ag-DES concentration and operating temperature discriminations using compounds with different ratio of 1-octene/n-octane. The novel Ag-DES showed optimal separation performance regarding 1-octene/n-octane and possessed the highest levels separation selectivity in the range 3.57–16.11 with excellent circulation stability in our best knowledge. Furthermore, FT-Raman measurements and quantum chemistry calculation were performed to elucidate the interaction mechanism of Ag-DES in the separation of 1-octene and n-octane, which revealed that both chemical complexation and strong physical attraction existed in the complex of Ag-DES and 1-octene rather than n-octane. A practical process was proposed for the separation of olefin and paraffin, which indicates that an advanced separation technology could largely reduce the energy consumption. This study lends important insight for the development of Ag-DES reactive extraction separation process for the energy-efficient long chain α-olefins purification from F-T synthesis products.
研究领域:
化学工程
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能源科学
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产品关联
DOI
高影响因子
Nanoscale Research Letters
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2019
·Vol. 14
·期 1
·1-8
·
IF 3.159
Mai Jiaying,Tang Naiwei,He Waner,Zou Zhengmiao,Luo Chunlai,Zhang Aihua,Fan Zhen,Wu Sujuan,Zeng Min,Gao Jinwei,Zhou Guofu,Lu Xubing,Liu J-M
We performed a systematic study of the influence of environmental conditions on the electrical performance characteristics of solution-processed 2,7-dioctyl [1] benzothieno[3,2-b][1]-benzothiophene (C8-BTBT) thin-film transistors (TFTs). Four environmental exposure conditions were considered: high vacuum (HV), O 2 , N 2 , and air. The devices exposed to O 2 and N 2 for 2 h performed in a manner similar to that of the device kept in HV. However, the device exposed to air for 2 h exhibited significantly better electrical properties than its counterparts. The average and highest carrier mobility of the 70 air-exposed C8-BTBT TFTs were 4.82 and 8.07 cm 2 V -1 s -1 , respectively. This can be compared to 2.76 cm 2 V -1 s -1 and 4.70 cm 2 V -1 s -1 , respectively, for the 70 devices kept in HV. Furthermore, device air stability was investigated. The electrical performance of C8-BTBT TFTs degrades after long periods of air exposure. Our work improves knowledge of charge transport behavior and mechanisms in C8-BTBT OTFTs. It also provides ideas that may help to improve device electrical performance further.
研究领域:
材料科学
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电子工程
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半导体物理
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DOI
PubMed
高影响因子
Journal of Materials Chemistry B
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2016
·Vol. 4
·期 25
·4402-4409
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IF 4.872
Nan Lv,Zhigang Wang,Wenzhi Bi,Guangming Li,Jilin Zhang,Jiazuan Ni
The novel chloro(dimethyl)octylsilane (C8)-functionalized [CeO2//SiO2] Janus fibers (denoted CeO2//SiO2-C8) have been successfully prepared by electrospinning technique and subsequent modification. The CeO2//SiO2-C8 Janus fiber composed of the side-by-side CeO2 fiber and SiO2 fiber modified by C8 is endowed with separate affinity sites and hydrophobic chains. It has a relatively high specific surface area of 127.4 m2 g−1 with an average pore size of 4.1 nm. The potential of CeO2//SiO2-C8 Janus fibers for the selective capture and individual MS detection of low-abundance endogenous peptides and phosphopeptides from the tryptic protein digest and human serum real sample was explored and evaluated for the first time. The experimental results demonstrate that the CeO2//SiO2-C8 Janus fiber can selectively extract phosphopeptides in virtue of high selective affinity of CeO2 to phosphate groups and enrich low-abundance peptides on account of the strong hydrophobic interaction of C8 chains. Moreover, the enrichment performance of the CeO2//SiO2-C8 probe is superior to that of commercial products (e.g. TiO2 nanoparticles and ZipTipC18 pipette tips) available. Overall, the efficient enrichment capability of CeO2//SiO2-C8 Janus fibers makes them a prospective candidate for the capture of low-abundance endogenous peptides and phosphopeptides from complex biological samples for individual MS detection.
研究领域:
生物化学
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分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Xianjie Wang,Jingdong Gou,Louwei Cui,Jinhui He,Xue Ma,Yaning Zhao,Liuyi Pan,Huiyong Chen,Zhe Jin,Hongyan Wang,Yonghong Zhu,Dong Li
The separation of ethylcyclohexane (ECH) from coal-based C8 naphthenic oil mixtures poses significant industrial challenges due to their similar physicochemical properties. Herein, we investigate the separation performance of carbon molecular sieves with varying pore sizes and oxygen content through dynamic breakthrough experiments and pulse testing with real industrial feedstocks. The results demonstrate that CMS-100 exhibits superior separation efficiency for ECH with an adsorption selectivity of 1.9 (ECH/ trans -1, 2-dimethylcyclohexane) as well as ECH uptake of 49 mg/g, achieving a separation factor of 0.48, attributed to its optimal microporous structure (0.64–0.86 nm). In contrast, CMS-75, characterized by a larger mesopore volume (2–20 nm), facilitates faster desorption rates, aiding in molecular transport. Grand canonical Monte Carlo (GCMC) simulations confirm that variations in substituent arrangement influence the diffusion rates of C8 cycloalkanes within the pore channels, while oxygen-containing functional groups enhance the interaction energies between C8 cycloalkanes and the adsorbent, particularly for ECH, whose larger ethyl group and electronic effects result in stronger adsorption affinity compared to DCH isomers. However, the presence of oxygen functionalities negatively impacts overall adsorption capacity by introducing steric hindrance. These findings underscore the importance of precisely optimizing both pore size distribution and surface chemistry for efficient hydrocarbon separation. This work provides a solid foundation for developing next-generation adsorbents aimed at industrial-scale separation of naphthenic oils.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
TALANTA
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2024
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IF 5.6
Wen-Chao Deng,Hai-Long Qian,Cheng Yang,Shu-Ting Xu,Xiu-Ping Yan
Covalent organic frameworks (COFs) has shown great potential as stationary phase in gas chromatography separation. However, designing COF stationary phases with high separation performance remains challenging. Here, we report a novel strategy to enhance the separation ability of COF stationary phases through tuning the interlayer stacking of COF. A rare interlayer modulation of 2D COFs from eclipsed-AA to slipped-AA was achieved through a two-step synthesis method. Simply changing the solvent used in step 1 allowed an interlayer modulation from slipped-AA to eclipsed-AA. As the proof-of-concept, 5,10,15,20-tetrakis(4-aminophenyl)-21H,23H-porphyrin (Tph) and 2,5-dihydroxyterephthalaldehyde (DHTA) were condensed to prepare 2D COF Tph-DHTA. The interlayer stacking of the 2D COF Tph-DHTA was tuned from eclipsed-AA model to slipped-AA by changing the solvent from o -dichlorobenzene + n -butanol (3:1, v/v) to tetrahydrofuran + n -butanol (1:7, v/v) in step 1. The as-prepared Tph-DHTA with slipped-AA stacking ( s -Tph-DHTA) showed higher resolution and faster separation of C8 aromatic isomers than that with eclipsed-AA stacking ( e -Tph-DHTA). The formation of slipping stacking of s -Tph-DHTA facilitated the thermodynamics, but did not affect the mass transfer resistance for the separation of C8 aromatic isomers. This work not only provides a promising way to modulate the stacking structure of COFs, but also opens a new strategy to design COF stationary phases for the separation of intractable isomers.
研究领域:
材料科学
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分离科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Tongtong Ren,Suli Liu,Hong Li,Angui Zhang,Xingang Li,Wei Yuan,Xin Gao
Utilization of F-T synthetic to produce value-added C 8 linear α-olefin is a promising alternative approach, however, the purification of α-olefin from F-T synthetic products is a great challenge, especially for removing 2-methyl-1-heptene (MH). This article addresses the novel method of etherification reaction to remove MH from F-T synthetic products, and develop by far the most efficiency reactive distillation (RD) method to intensified the etherification process. The scarcity of thermodynamic data was measured and regressed by the activity coefficient models, furthermore, kinetics of the etherification reaction of MH with methanol was explored using an ion exchange resin as catalyst, and then fitted by a pseudo-homogeneous model. The pilot-scale RD experimental results show that the conversion of MH reaches 91.83 % and the purity of α-olefin increases by 14.9 wt% (percentage points). Process analysis method was used to realize the optimization of design and operating parameters of etherification RD column based on the developed rigorous model. The optimization results show that the conversion of MH achieves 99.74 % and the purity of α-olefin achieves 96.87 wt%, which is also illustrated that the novel method for removing MH is proposed paving the way for purification of α-olefin from F-T synthetic products.
研究领域:
化学工程
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石油化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）