INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
·
IF 3.9
Haiwei Xu,Linghao Li,Jian Huang,Wei Wang,Siyu Yang,Haohao Gao,Suhui Chen,Haojian Zhang,Zile Hua
Hierarchically structured high-silica ZSM-5 nanozeolites with an average particle size of about 115 nm and abundant inter/intra-crystal mesopores were successfully synthesized via a new combination of dry-gel crystallization (DGC) and subsequent alkali-etching treatment. The alkali-etching process effectively introduced auxiliary intracrystal mesopores into the nanozeolite precursors, significantly increasing the specific surface area and total pore volume while maintaining appropriate surface acidity, which had been confirmed by comprehensive characterizations, e.g., XRD, N2 sorption isotherms, SEM, TEM, NMR, ICP-OES, and NH3-TPD. Benefiting from the developed three-dimensional interconnected micro/mesoporous structure, the resultant nanoZSM-5(200)_D catalyst exhibited superior performance in the methanol-to-propylene (MTP) reaction. It achieved 46% propylene selectivity and an exceptionally prolonged catalyst lifetime for 90% methanol conversion of 224 h (t90), which is approximately 3 times and 16 times that of the nanoZSM-5(200) precursor and purely microporous ZSM-5(200) counterpart, respectively. Additionally, the universality of the here-reported two-step procedure has also been proven, which offers a new choice for preparation of high-performance hierarchically structured zeolite catalysts.
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Cell Reports
·
2020
·
IF 8.109
Wenjuan Zhang,Shimin Wang,Chao Yang,Can Hu,Dan Chen,Qian Luo,Zhen He,Yuhan Liao,Yuxin Yao,Juan Chen,Jun He,Junbo Hu,Tian Xia,Long Lin,Anbing Shi
Summary To explore the mechanism of Rab5/RAB-5 activation during endocytic recycling, we perform a genome-wide RNAi screen and identify a recycling regulator, LET-502/ROCK. LET-502 preferentially interacts with RAB-5(GDP) and activates RABX-5 GEF activity toward RAB-5, presumably by disrupting the self-inhibiting conformation of RABX-5. Furthermore, we find that the concomitant loss of LET-502 and another CED-10 effector, TBC-2/RAB-5-GAP, results in an endosomal buildup of RAB-5, indicating that CED-10 directs TBC-2-mediated RAB-5 inactivation and re-activates RAB-5 via LET-502 afterward. Then, we compare the functional position of LET-502 with that of RME-6/RAB-5-GEF. Loss of LET-502-RABX-5 module or RME-6 leads to diminished RAB-5 presence in spatially distinct endosome groups. We conclude that in the intestine of C. elegans , RAB-5 resides in discrete endosome subpopulations. Under the oversight of CED-10, LET-502 synergizes with RABX-5 to revitalize RAB-5 on a subset of endosomes in the deep cytosol, ensuring the progress of basolateral recycling.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Zhengjiang Liu,Junjie Tang,Jiani Wu,Timur Borjigin,Bing Bai,Yaqiong Wang,Hedong Huang
Herein, we report a Fe 2 O 3 /CeO 2 porous nanotube as a high-performance heterogeneous photo-Fenton-like catalyst, featuring a stable Fe-O-Ce heterojunction confirmed by XPS and TEM. This structural design, coupled with enhanced visible-light absorption induced by Fe 2 O 3 modification on CeO 2 , constitutes its core structural innovation. Under 440 nm blue LED irradiation and at pH 5, this composite achieves complete degradation of 80 mg/L methyl orange within 60 min with 0.5 mL of 15 % H 2 O 2 , exhibiting remarkable catalytic efficiency. Radical trapping experiments identify h + and OH as dominant active species, with O 2 − playing a secondary role. Notably, the catalyst maintains excellent performance after 4 cycles, highlighting its superior stability. Furthermore, CeO 2 facilitates electron transfer from H 2 O 2 to Fe 3+ , accelerating the Fe 3+ /Fe 2+ redox cycle. This accelerated cycle not only enhances H 2 O 2 activation and OH generation but also expands the pH operating range-overcoming the narrow pH limitation of traditional Fenton systems. Band analysis across the Fe 2 O 3 /CeO 2 heterojunction further clarifies the charge separation and transfer pathway underlying this enhanced catalytic behavior. With its exceptional co-catalytic activity, broad pH adaptability, and high stability, Fe 2 O 3 /CeO 2 porous nanotubes demonstrate great practical potential for real wastewater treatment. This work not only provides an efficient strategy for wastewater decontamination but also offers new insights into designing heterojunction-based catalysts for environmental remediation.
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Catalysis Science & Technology
·
2025
·
IF 4.2
Kai Yan,Zhihao Yu,Yingqing Li,Mengyan Guo,Yuanyu Wang,Xuebin Lu
The efficient dehydration of fructose to 5-hydroxymethylfurfural (HMF) is a crucial step in biomass valorization, requiring solid acids with precisely balanced Brønsted acidity. Defect engineering in Zr-based metal–organic frameworks (MOFs), such as UiO-66, is well known to enhance Lewis acidity; however, its impact on tailoring Brønsted acid sites remains insufficiently understood. Here, we demonstrate that defective UiO-66 possesses a dual-origin Brønsted acid system, comprising intrinsic μ3–OH groups and water molecules coordinated to defect-generated Lewis acidic Zr centers (Zr–H2O). The concentration of these Brønsted acid sites can be finely regulated by thermal activation treatment. A volcano-shaped dependence of catalytic activity on activation temperature is observed, with an optimum at 200 °C. At moderate activation temperatures below 200 °C, the removal of physisorbed water exposes both μ3–OH and Zr–H2O sites, maximizing Brønsted acid density and HMF yield. Activation beyond 200 °C reduces both types of Brønsted acid sites, resulting in diminished catalytic performance. This study reveals the cooperative effect of defect engineering and thermal activation in tuning the Brønsted acidity of MOFs, providing a rational strategy for designing highly selective catalysts for the sustainable production of platform chemicals.
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RSC Advances
·
2025
·Vol. 15
·期 21
·16348-16357
·
IF 4.6
Conghao Ku,Jiaming Tang,Xucheng Li,Zhengli Liu,Weiran Yang
The synthesis of bis(5-methylfuran)methane (BMFM) from biomass-based 5-methylfurfural (5-MF), a vital fuel precursor, is crucial for biomass refining. However, selective BMFM production from 5-MF needs to suppress side reactions such as hydrogenolysis and decarbonylation. Therefore, direct hydrogenation of 5-MF into BMFM is very challenging in sustainable biomass valorization. In this study, we developed a bimetallic RuCu/hydroxyapatite (HAP) catalyst for selective synthesis of BMFM from 5-MF. The RuCu/HAP catalyst delivered a BMFM yield of 75.6% under mild reaction conditions (Vwater : Vcyclohexane = 1 : 1, 4 MPa H2, 100 °C, 4 h), significantly surpassing its monometallic counterparts (Ru/HAP: 28.7%; Cu/HAP: 0%). Furthermore, a 79% yield of C11 straight-chain alkanes was obtained from BMFM through the hydrodeoxygenation (HDO) process. The systematic characterization revealed that Ru mediates hydrogenation steps via CO activation, while Cu orchestrates acid sites essential for self-condensation of 5-MFA. The synergistic interplay between metallic Ru and acidic Cu sites thereby enables simultaneous optimization of conversion efficiency and BMFM selectivity. These findings provide a practical and efficient route for converting lignocellulosic derivatives into renewable biofuels, particularly for sustainable aviation fuel applications.
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ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Meilin Lv,Gang Liu,Xiaoxiang Xu
Strong visible light absorption and high charge mobility are desirable properties for an efficient photocatalyst, yet they are hard to be realized simultaneously in a single semiconductor compound. In this work, we demonstrate that these properties coexist in homologous compounds ZnnIn2O3+n (n = 4, 5, and 7) with a peculiar layered structure that combines optical active segment and electrical conductive segment together. Their enhanced visible light absorption originates from tetrahedrally or trigonal-bipyramidally coordinated In atoms in Zn(In)O4(5) layers which enable p–d hybridization between In 4d and O 2p orbitals so that valence band minimum (VBM) is uplifted with a reduced band gap. Theoretical calculations reveal their anisotropic features in charge transport and functionality of different constituent segments, i.e., Zn(In)O4(5) layers and InO6 layers as being for charge generation and charge collection, respectively. Efficient photocatalytic hydrogen evolution was observed in these compounds under full range (λ ≥ 250 nm) and visible light irradiation (λ ≥ 420 nm). High apparent quantum efficiency ∼2.79% was achieved for Zn4In2O7 under full range irradiation, which is almost 5-fold higher than their parent oxides ZnO and In2O3. Such superior photocatalytic activities of these homologous compounds can be understood as layer-by-layer packing of charge generation/collection functional groups that ensures efficient photocatalytic reactions.
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TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Pengjiao Zu,Yisheng Zhang,Yi Li,Songwei Zhang,Jun Li,Litian Hu
2-mercapto-5-methyl-1,3,4-thiadiazole (MMT) based ionic liquids were synthesized, their corrosion inhibition behavior and tribological performance were systematically evaluated. Electrochemical experiments showed MMT based ILs exhibited surprising corrosion inhibition efficiencies. The ILs adsorption behavior obeys Langmuir isotherm. Friction tests demonstrated MMT based ILs performed excellent lubrication properties, compared to [BMIM][BF 4 ]. Combining with analysis of SEM and XPS , it can be concluded that the prominent lubrication performance ascribed to the coexistence of adsorption layer and tribo-film. Therefore, versatile ILs designed in this paper have gathered two significant abilities for industrial applications, which are high corrosion inhibiting performance and excellent lubricating properties. This work is instructive for structure design of multifunctional ILs and will promote industrial application of MMT based ILs in the future.
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Advanced Science Letters
·
2013
·Vol. 19
·期 4
·1226-1228
·
IF 0
Chao Guoku,Shao Lianping,Yao Shuai,Hong Liming,Li Dashuai,Xiong Jing
7 Aza-Michael adducts, 3-(5-substituted-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-propionic acid ethyl esters were synthesized by 5-subtituted uracils and ethyl acrylate with ammonia as a catalyst. It was significant that the synthetic compounds were collected in almost quantitive yields
without column chromatography. The structures of the compounds were determined by NMR, mass spectra, X-ray crystallography analyses and elemental analyses.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2011
·Vol. 82
·期 1
·340-344
·
IF 1.77
Yong Xiang Wu,Jing Cao,Hai Yan Deng,Jun Xiang Feng
A novel fluoroionophore 1 based on 3,4-dimethylthieno[2,3-b]thiophene bearing two monoaza-15-crown-5 ethers at 3- and 4-positions was prepared. UV–vis and fluorescence responses of compound 1 upon the addition of alkali and alkaline earth metal cations were evaluated in acetonitrile solution. Receptor 1 showed unique response for Ba 2+ due to the formation of an intramolecular sandwich complex.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2014
·Vol. 32
·期 3
·371-376
·
IF 1.42
Cao Jing,Feng Jun-xiang,Wu Shi
Novel conjugated polymers with aza-15-crown-5 as pendant groups, P1 were synthesized by the Sonogashira coupling reaction. The polymer P1 was found to show fluorescence enhancement response towards Ba 2+ . The gradual recovery and turning-point of emission intensity of polymers appeared in the addition of Ba 2+ , which provided good evidence for the fluorescence amplification mechanism of conjugated polymers.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jiaojiao Cao,Chengbin Guo,Zhenyu Chen
A series of MOF-5 @BTA-X (X = -CH 3 /-NH 2 /-CO(CH 2 ) 6 CH 3 ) anticorrosion composites was fabricated through loading benzotriazole derivatives in a metal–organic framework (i.e., MOF-5). Their crystal structures and morphologies were characterized by single-crystal X-ray diffraction analysis, Fourier transform infrared spectroscopy , and transmission electron microscopy . The loading–releasing mechanisms between MOF-5 and BTA derivatives were revealed by experiments and theoretical calculations. Their anticorrosion performance for copper was also evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization in 0.5 M NaCl. The corrosion product was analyzed via scanning electron microscopy and X-ray photoelectron spectroscopy. The results indicated that the loading capacities followed the order of MOF-5 @BTA-NH 2 > MOF-5 @BTA-CH 3 > MOF-5 @BTA-CO(CH 2 ) 6 CH 3 . The release rates followed the order of MOF-5 @BTA-NH 2 < MOF-5 @BTA-CH 3 < MOF-5 @BTA-CO(CH 2 ) 6 CH 3 . Furthermore, the results of theoretical calculations indicated that the differences in loading capacities depended on the polarity of the functional group. Meanwhile, the strong binding force decreased the release rate.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Wei-Yao Yang,Shu-Ting Bao,Sheng-Bo Du,Heng Mao,Zhi-Ping Zhao,Le Sang
Highly efficient HMF synthesis was realized in μPBRs over ACB18-Si-ILs. • HMF (90.8%) or LA (65.2%) was selectively produced in μPBRs within 252 s. • ACB 18 -Si-ILs stably catalyzed fructose conversion to HMF in μPBRs for 1440 min. • Product yields in μPBRs were predicted by an intrinsic kinetic model. • LHHW kinetic analysis identified the surface reaction as the rate-determining step. In this work, acidic ionic liquids (ILs) were immobilized on activated carbon beads (ACB) with a particle size of 0.3 mm (ACB 18 -Si-ILs), and combined with micropacked bed reactors (μPBRs) to achieve continuous and long-term conversion of fructose to 5-hydroxymethylfurfural (HMF). After pretreatment, the specific surface area of ACB reached 1249.4 m 2 /g, and the ionic liquid was chemically bonded to the support, exhibiting good stability. Selective production of HMF and levulinic acid (LA) was achieved through reaction optimization and solvent regulation, achieving a yield of 90.8% HMF or 65.2% LA within 252 s in μPBRs. The space-time yield of HMF and LA were both increased by an order of magnitude compared to traditional reactors, and the HMF yield maintained over 85% after 1440 min continuous operation. A heterogeneous intrinsic kinetic model was established for predicting product yield in μPBRs, with the error controlled within ±15%. Under the intrinsically kinetic controlled regime, the Langmuir-Hinshelwood-Hougen-Watson model was constructed, identifying the catalyst surface reaction as the rate-limiting step. The adsorption constants of fructose and HMF were obtained and the catalyst surface reaction rate was predicted with an error less than ±10%. Download: Download high-res image (167KB) Download: Download full-size image
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