Journal of the Taiwan Institute of Chemical Engineers
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2021
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IF 5.876
Qiaofei Han,Jianan Wang,Mantian Li,Xiaoda Wang,Qinglian Wang,Changshen Ye,Chen Yang,Ting Qiu
Background In recent years, Supported catalytic packings (SCPs) with zeolite coating on metallic substrates have received extensive attention due to their satisfactory heat/mass transfer properties. Methods Herein, high-performance SCP with HZSM-5 coating was fabricated by secondary growth method with polydopamine (PDA)-assisted seeding, where PDA was used as a "double-sided adhesive" sandwiched between supports and seeds. The atom-economic reaction of cyclohexene and acetic acid for cyclohexyl acetate production was carried out to evaluate the catalytic performance of as-fabricated SCPs. Significant Findings Due to the strong adhesion of PDA, the uniform and high-coverage seeding layer was achieved under the optimized seeding conditions, then continuous HZSM-5 coating that possessed high crystallinity, rough surface, and intergranular voids was formed. Compared with SCP prepared by secondary growth method with the traditional dip coating seeding method, the catalytic activity and stable operation time of PDA-assisted SCP were increased by 50% and 57%, respectively. Furthermore, PDA-assisted seeding method is easy to conduct, indicating its great potential in practical applications.
研究领域:
化学工程
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催化材料
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2025
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IF 4.7
Weimin Yan,Chengmin Hou
Flexible electronics demand conductive films with high stability and conductivity. However, silver nanowires (AgNWs) face challenges like agglomeration and inconsistent morphology. In this study, AgNWs were synthesized via a two-step process: (1) preliminary growth using a glass fiber template and polyol method (diameter: 0.2–0.4 μm, length: 1–6 μm), and (2) secondary growth by mixing AgNWs with PVA solution followed by heat treatment. The secondary growth enhanced nanowire dimensions (diameter: 5–7 μm, length: 100–200 μm) and conductivity. The optimized film exhibited stable resistance (4 MΩ) after 5000 bends (90° and 180°) and achieved optimal performance at 100 °C/30 min. This method provides a scalable solution for flexible electronics.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Rui Wang,Mingjie Wei,Yong Wang
Covalent organic frameworks (COFs) has emerged as a highly promising platform material for the manufacturing of molecule-separating membranes. However, COF membranes are predominantly used in the separation of dyes from water or organic solvents and there are very few reports on COF-enabled membranes for desalination . In this work, the secondary growth approach based on unidirectional diffusion synthesis is developed to grow continuous thin films of a COF with an intrinsic pore size of 0.8 nm on macroporous substrates to prepare COF membranes for desalination. The amino-modified polymer microfiltration substrate is fixed in a diffusion cell to separate the oil phase containing the aldehyde precursor (1,3,5-triformylphloroglucinol, Tp) and the aqueous phase containing both the amino precursor (hydrazine, Hz) and the catalyst. Because of the immiscible bi-phase solutions and the high molar ratio of Hz to Tp, the unidirectional diffusion of Hz molecules in the pore channel of the substrate is achieved and the polycondensation between the two precursors occurs at the phase interface . The unidirectional diffusion synthesis is sequentially performed for two times and the secondary growth is essential to ensure the formation of a defect-free, continuous thin film of COF (TpHz) on the top surface of the substrate. Cladding COF coatings are also formed along the skeleton in the near-surface region of the substrate. Such an asymmetric structure ensures both a good permselectivity and a strong adhesion between the grown COF layers and the substrates. The continuous COF thin film grown on the substrates serves as the selective layer, and the COF membrane prepared under the optimized condition exhibits an appreciable Na 2 SO 4 rejection of 58.3% and a water permeance of 40.5 L∙m −2 ∙h −1 ∙MPa −1 which are ~ ten times higher than other membranes with similar rejections. This study not only demonstrates the potential of COFs in desalination but also showcases an efficient strategy to grow continuous thin films of COFs on porous substrates which are desired in diverse applications.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
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2024
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IF 3.2
Rui Wang,Ruilan Xu,Kaipeng Zhang,Lu Gan,Xintu Lin,Shangxi Zhang,Yong Peng
Preventing the appearance of fog on transparent glass is an important issue not only in our daily lives but also in scientific research and clinical diagnosis. A zeolite molecular sieve with MFI-type structure was identified as a very promising antifog material. In this work, MFI zeolite films with different microstructures were prepared by the solvothermal secondary growth method using diols including ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG), and tetraethylene glycol (tEG) as solvents. The elimination mechanism of new MFI twin crystals was demonstrated based on scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM) characterizations of the resulting films and the mother solutions. The twin-free MFI films with b-axis preferred channel orientation exhibited both higher light transmittance and lower haze compared with the a-&b-mix-oriented film. The employment of diol solvents facilitated the generation of a surface Si–OH group on the films, leading to the improvement of film hydrophilicity. By taking advantages of the high transparency and hydrophilicity, the b-oriented MFI films synthesized on glass substrate achieved good antifogging performance.
研究领域:
材料科学
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光学
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表面科学
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DOI
高影响因子
Nanoscience and Nanotechnology Letters
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2014
·Vol. 6
·期 11
·953-958
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IF 1.444
Yang Lili,Chen Gang,Sun Yunfei,Han Donglai,Yang Shuo,Gao Ming,Wang Zhe,Zou Ping,Luan Hongmei,Yang Jinghai
We construct CdS quantum dots (QDs) sensitized solar cells with ZnO nanorods as photoanodes. To enlarge the QDs loading surface of ZnO nanorods, we perform primary and secondary growth to obtain ZnO nanorods with different length. We investigate its influence on the photovoltaic performance
of the solar cells. The photovoltaic performance for ZnO nanorods photoanodes with secondary growth exhibits a 41% enhancement in energy conversion efficiency compared to the ZnO nanorods photoanodes with primary growth.
研究领域:
材料科学
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纳米技术
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能源科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
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IF 3.764
Shichao Han,Pan Liu,Ye Ma,Qinming Wu,Xiangju Meng,Feng-Shou Xiao
Calcination-free fabrication of highly b-oriented silicalite-1 (S-1) zeolite films in the absence of organic structure-directing agents (OSDAs) is attractive but still challenging. Herein, for the first time, we show a novel route for calcination-free synthesis of a b-oriented S-1 zeolite film in the absence of OSDAs. The key to this success is a rational secondary growth of zeolite crystals on the surface of supports by avoidance of the formation of zeolite nuclei in the system due to the absence of OSDAs. Because of OSDA-free synthesis of S-1, it not only reduces the cost of zeolite films but also avoids the calcination of OSDAs in the synthesis, thus avoiding the formation of cracks in the zeolite films. In addition, the calcination-free fabrication is favorable for reduction of zeolite film defects such as a terminal OH group. As a result, the zeolite films obtained from this work exhibit higher hydrophobicity than the conventional one. Furthermore, the current polarization curve of this S-1 zeolite film shows excellent corrosion resistance. The aforementioned features would be potentially important for industrial application of zeolite films in the near future.
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
ADVANCED MATERIALS
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2024
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IF 27.4
Zhengbo Cui,Wen Li,Bo Feng,Yunfei Li,Xuemin Guo,Haobo Yuan,Qiang Weng,Tengyi You,Wenxiao Zhang,Xiaodong Li,Junfeng Fang
The p- or n-type property of semiconductor materials directly determine the final performance of photoelectronic devices. Generally, perovskite deposited on p-type substrate tends to be p-type, while perovskite deposited on n-type substrate tends to be n-type. Motived by this, a substrate-induced re-growth strategy is reported to induce p- to n-transition of perovskite surface in inverted perovskite solar cells (PSCs). p-type perovskite film is obtained and crystallized on p-type substrate first. Then an n-type ITO/SnO 2 substrate with saturated perovskite solution is pressed onto the perovskite film and annealed to induce the secondary re-growth of perovskite surface region. As a result, p- to n-type transition happens and induces an extra junction at perovskite surface region, thus enhancing the built-in potential and promoting carrier extraction in PSCs. Resulting inverted PSCs exhibit high efficiency of over 25% with good operational stability, retaining 90% of initial efficiency after maximum power point (MPP) tracking for 800 h at 65 °C with ISOS-L-2 protocol.
研究领域:
材料科学
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光伏技术
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半导体物理
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Shenyi Tang,Chenglian Luo,Zhi Wang,Xinlei Liu
A defect-free and stable metal–organic framework (MOF) membrane is a promising candidate for the separation of methanol/methyl tertiary butyl ether (MeOH/MTBE) mixtures. In this work, a structural-integrity and low-thickness (∼400 nm) UiO-66 membrane was fabricated by regulating the metal ion/ligand molar ratio in the synthesis solution and optimizing the preparation process using the secondary growth method with safer and more environment-friendly Zr(n-OPr)4 metal source. Based on the effective pore size and inherent amphiphilic structure of UiO-66, the membrane exhibits exceptional pervaporation (PV) performance. For the separation of MeOH/MTBE (5:95 wt/wt %) mixtures, the membrane displays an outstanding separation performance with an average separation factor of 2.23 × 104 and an average total flux of 3.61 kg·m–2·h–1 at 40 °C, which is superior to most membranes reported for the PV separation of MeOH/MTBE mixtures. In addition, a 72 h PV process was used to further confirm the structural stability of the membrane.
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
JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 17
·7319-7332
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IF 4.5
Hou Zhaoping,Tian Zihan,Zhao Junming,Yang Xinhe,Liu Liangliang
Zeolite imidazole framework-8 (ZIF-8), serving as a promising adsorbent for wastewater treatment, is limited in practical wastewater treatment due to its polycrystalline powder form resulting in poor recoverability. Herein, the millimeter-scale ZIF-8@porous mullite beads were prepared by the seeded-secondary growth method. The surface of the porous mullite beads is fully encapsulated by nanoscale ZIF-8 crystals, and the ZIF-8 crystals are anchored by mullite whiskers. This composition provides ZIF-8 with a stable macroscopic structure and maintains the exposure of its adsorption sites. Therefore, the ZIF-8@porous mullite beads exhibited good adsorption performance toward methyl orange (MO) and orange G (OG) in the aqueous solution. The analysis of adsorption kinetics indicating the adsorption efficiency of ZIF-8@mullite-w on MO and OG is influenced by the concentration of adsorbates and the adsorption sites. The maximum adsorption of ZIF-8@porous mullite beads on MO and OG was 16.5289 and 5.111 mg/g, respectively.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Xiaoke Wu,Yanwei Yang,Xiaofei Lu,Zhengbao Wang
The preparation of thin metal-organic framework (MOF) membranes by seeded secondary growth method is still a challenge. In this study, relatively thin ZIF-8 membranes with high gas separation performance on alumina hollow fibers are prepared in autoclaves with thick-walled Teflon-liners by the seeded secondary growth method under the modulation of sodium formate. The ZIF-8 membrane thickness can be greatly decreased and the cracks in the membrane layer can be avoided by using thick-walled Teflon-liner (e.g., 7.5 mm) during secondary growth mainly due to the slow heating and cooling of the synthesis solution, which can control the nucleation rate and growth rate of crystals, leading to an appropriate membrane formation rate. A certain amount of sodium formate can introduce ZnO particles in the seed layer to improve the formation of dense ZIF-8 membrane layer and control the growth rate of membrane layer. The suitable amount of sodium formate and thick-walled Teflon-liner are crucial in ensuring the well-intergrowth of relatively thin ZIF-8 membranes. Owing to reduced grain boundary defects, the prepared ZIF-8 membranes show an ideal H 2 /N 2 separation selectivity of 30.9 ± 1.8, which is at least twice the highest value reported in the literature under similar separation conditions.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Liu Pei,Jiaqiang Liu,Yan Xu,Yide Han,Junbiao Wu,Zhuopeng Wang,Xia Zhang
Hierarchical Zn x Cd 1-x S (x = 1, 0.85, 0.74, 0.64, 0.46 and 0.36) microclusters were successfully prepared by a secondary growth strategy using ethanol as solvent under solvothermal condition. Cluster-like ZIF-8 crystals derived from crystalline hierarchical zinc carbonate, CdCl 2 inorganic salt and thiourea were used as the starting materials at stoichiometric ratios. The as-prepared hierarchical hierarchical Zn 0.64 Cd 0.36 S material exhibits excellent water splitting performance with a maximum H 2 generation rate of 815 μmol g −1 h −1 under visible-light irradiation in the presence of sacrificial agent of 0.25 M Na 2 S and 0.35 M Na 2 SO 3 . This hydrogen generation efficiency is about 23 times higher than that of pure CdS (34.7 μmol g −1 h −1 ) and 14 times higher than Zn 0.64 Cd 0.36 S reference material (56.4 μmol g −1 h −1 ) prepared by one-pot hydrothermal method . The hierarchical Zn 0.64 Cd 0.36 S material exhibits a synergetic effect as a photocatalyst to enhance hydrogen generation and the corresponding photocatalytic mechanism is discussed in detail. This work demonstrates a feasible morphology preservation strategy to prepare novel hierarchical composites with specific chemical composition, high surface area, and abundant active sites, characterized by a rapid diffusion and separation of photogenerated charge carriers proving a visible-light driven photocatalytic hydrogen generation.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2025
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IF 4.7
Fengming Mo,Tao Huang,Jinqiang Peng,Yaoyao Shen,Ting Wu,Yuqing Li,Fei Zhang,Xiangshu Chen,Hidetoshi Kita
ZSM-58 membranes were successfully prepared using nanosized ZSM-58 crystals as seeds via a secondary growth method. The effects of various synthesis conditions, including temperature and time, were systematically investigated to elucidate their influence on crystalline structure and morphology. The performance of the membranes synthesized by nano-crystal seeding is superior to that of the membranes synthesized by micro-crystal seeding. The results demonstrate that the ZSM-58 membrane exhibits high selectivity for CO 2 /CH 4 (142.40), CO 2 /N 2 (28.62) and CO 2 /CO (13.79). Additionally, the CO 2 permeance values for binary gas mixtures are 2.56×10 -7 mol·m -2 ·s -1 ·Pa -1 , 2.31×10 -7 mol·m -2 ·s -1 ·Pa -1 and 2.40×10 -7 mol·m -2 ·s -1 ·Pa -1 , respectively. Furthermore, under continuous operation for 100 hours with an equimolar gas mixture, the membrane's separation performance remains stable, with CO 2 permeability and CO 2 /CH 4 selectivity values of 2.42×10 -7 mol·m -2 ·s -1 ·Pa -1 and 141.53, respectively. These findings indicate that the ZSM-58 zeolite membrane possesses excellent long-term stability and holds significant potential for industrial CO 2 removal applications.
研究领域:
材料科学
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膜分离技术
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环境工程
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化学工程
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能源化工
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工业气体净化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）