Journal of Inorganic and Organometallic Polymers and Materials
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2024
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IF 3.9
Liu Hao,Wang Yanlin,Yuan Hong,Luo Wenbo
Nanoscale ZSM-5 zeolites (NZSM-5) having different crystal sizes and Si/tetrapropylammonium hydroxide (TPAOH) molar ratios were synthesized using a hydrothermal method. These materials were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and N 2 adsorption–desorption. The results showed that each zeolite was highly crystalline regardless of the Si/TPAOH ratio and that the Brunauer–Emmett–Teller surface areas were in the range of 329−392 m 2 /g. The random aggregation of these nanoparticles resulted in the formation of numerous intergranular mesopores. These NZSM-5 zeolites were applied to the catalytic cracking of oleic acid to prepare light olefins and light aromatics using a laboratory-scale fixed bed reactor. The zeolite having a Si/TPAOH ratio of 10/5 showed the best catalytic activity and provided light olefins yield of 55% and selectivity of BTX in liquid phase products of 18%, respectively, at 500 °C. The small crystal size and abundant intergranular mesopores in this specimen resulted in shorter diffusion paths and an increase in the external specific surface area that both inhibited coke deposition and ensured accessible acid sites. Graphical Abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Wei Zhao,Yinan Xu,Yuehui Qiao,Rui Sun,Jie Qian,Yixue Wang,Quan Liu,Zhekun Shi,Fandong Meng,Xiaoli Zhan,Qinghua Zhang
Zeolites have been widely utilized in the adsorption of volatile organic compounds (VOCs) due to their high specific surface area and robust stability. However, the adsorption capacity of zeolites for VOCs is considerably reduced under humid conditions due to the competitive adsorption between water and VOCs, thereby limiting their industrial applicability. Herein, we report a core–shell ZSM-5@NiAl-LDH (Z-L) composites designed specifically for efficient adsorption of VOCs under high humidity conditions. The core–shell architecture is achieved by introducing active sites onto the ZSM-5 framework pretreated with high-alkalinity agents, followed by the growth of NiAl-LDH on its surface, creating a regular, vertically staggered structure. Compared with ZSM-5 zeolite, Z-L composites show a larger specific surface area, wider pore size, and larger mesopore volume, allowing a high adsorption capacity of the VOCs. Contact angle and static adsorption tests of water molecules reveal that the LDH shell effectively increases the hydrophobicity of Z-L composites. The dynamic adsorption behavior for m-xylene demonstrates that Z-L composites exhibit significantly enhanced adsorption capacity, 3.79 times that of ZSM-5 zeolite. Furthermore, Z-L composites exhibit a higher selectivity for m-xylene at 60 % relative humidity, achieving a Q wet /Q dry ratio of 86.7 %, outperforming most porous adsorption materials. Kinetic model analysis reveals that the augmentation of mesopores in Z-L composites enhances the effective diffusion space for synthesized samples, resulting in exceptional adsorption performance. This novel synthetic material is anticipated to be a promising candidate for VOCs pollution control in high-humidity environments.
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JOURNAL OF THE ENERGY INSTITUTE
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2024
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IF 5.6
Shunnian Xu,Zhiguo Sun,Kaijun Hou,Gang Wang,Meijia Liu,Yahong Zhang,Chenwei Zhang,Zhongdong Zhang
Undesirable side reactions often occur during the catalytic pyrolysis of olefins in FCC gasoline to produce light olefins. We proposed a method to maximize light olefin selectivity by suppressing these side reactions. In this study, P-ZSM-5 and Ce–P-ZSM-5 were prepared by the pore volume impregnation method to investigate the regulatory relationship between their acidity/alkalinity and catalytic pyrolysis. The study found that acid sites could promote the olefin conversion and adjust the cracking pathway. Furthermore, the densities of strong B acid sites and base sites could regulate olefin adsorption, affecting hydrogen transfer activity. Acid strength was crucial in controlling the aromatization reaction. It showed that thermal cracking played a minor role in catalytic pyrolysis, with methane generation mainly resulting from acid sites promoting the cracking of terminal C–C bonds. Loading phosphorus strengthens the acidity of ZSM-5, while loading cerium weakens its acidity and enhances its alkalinity. By optimizing the acidity and alkalinity of ZSM-5, side reactions were suppressed, maximizing the selectivity of light olefins. The results showed that the light olefin selectivity of Ce–P-ZSM-5 increased from 33.2% to over 80%, while the side reaction selectivity decreased from over 60% to below 10%. This work will lay a good foundation for developing catalysts for catalytic pyrolysis of olefins to produce light olefins.
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JOURNAL OF MEDICINAL CHEMISTRY
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2025
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IF 6.8
Zhaoxiang Song,Huaduan Liang,Chu Xue,Shuxian Wang,Younan Ren,Zhuang Zhang,Tifei Xu,Bo Niu,Mengmeng Song,Mengru Liu,Xu Qin,Jie Li,Xianya Zhao,Fang Zhao,Jianhua Shen,Zhengyu Cao,Kai Wang
Transient receptor potential canonical channels 4 and 5 (TRPC4/5) are nonselective cation channels involved in emotional regulation, positioning them to be promising targets for treating mental disorders such as anxiety and depression. HC-070, a potent TRPC4/5 inhibitor, exhibits significant anxiolytic and antidepressant effects in animal models, though its drug-like properties require optimization. In this study, we applied a property-based drug design (PBDD) approach to optimize HC-070, leading to the discovery of compound 32, which shows improved LipE and Fsp3 values, reduced hERG blocking activity, enhanced metabolic stability, increased aqueous solubility, and superior oral bioavailability. Oral administration of compound 32 in mouse models demonstrates anxiolytic and antidepressant efficacy comparable to fluoxetine. This study supports the therapeutic potential of TRPC4/5 inhibitors for mental disorders and identifies compound 32 as a promising candidate for further investigation. Furthermore, our work underscores the value of PBDD in optimizing lead compounds during drug discovery process.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Lei Han,Ruiling Du,Yu Chen,Ling Zhang,Huifang Wang,Haijun Zhang,Shaowei Zhang
Porous high-entropy transition metal compounds, an important type of ultra-high temperature material, have attracted increasing attention in the applications of extreme environments due to their low density, good thermal insulation and stable chemical properties. A robust, flame-retardant and high-temperature resistant high-entropy carbonitride (Ti 1/5 V 1/5 Mo 1/5 Nb 1/5 Ta 1/5 )(C 0.55 N 0.45 ) (HECN) porous ceramic was synthesized and thoroughly characterized. It exhibited a porosity of 93.5 %, a compressive strength of 1.3 MPa and a good high-temperature stability up to 1673 K, which, along with its outstanding fire-retardancy, and low thermal conductivity (as low as 0.150 W m −1 K −1 at 298 K), made it a good candidate material for thermal insulation applications in ultra-high temperature environments. Moreover, the Density functional theory (DFT) calculations predict that the [N]/([C]+[N]) ratio in HECN foam affects its lattice thermal conductivity which is decreased by 67 % upon increasing the ratio from 0 to 1/2.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jiahui Feng,Tao Zhang,Zhen Yang,Kunyan Qian,Xin Wang,Wanqing Song,Panzhe Qiao,Jia Ding,Wenbin Hu
Acidic oxygen evolution reaction (OER) is crucial for developing proton exchange membrane water electrolyzers, which has been hindered by the high overpotential of iridium oxide (IrO x )-based catalysts and the scarcity of iridium. Herein, we introduce a novel strategy to synthesize ultra-thin amorphous IrO x nanosheets with flexible mono/multi-element doping. Benefiting from synergistic W/Mo/Co co-doping effect, WMoCo-IrO x nanosheets (WMC-IrO x NS) sample optimally modulates the Ir electronic structure, maintains the neutral oxygen vacancy concentration and stabilizes Ir sites. Additionally, the nanosheets expose abundant Ir active centers. WMC-IrO x NS exhibits superior OER electrocatalysis performance with a low overpotential of 241 mV, excellent stability of 275 h at 10 mA cm −2 , and a high mass activity of 545.4 A/g Ir. The catalyst follows the lattice oxygen mechanism (LOM) pathway. As observed in in situ attenuated total reflectance Fourier transform infrared spectroscopy, compared to the un-doped sample, WMC-IrO x NS accumulates negligible Ir–O–O* intermediates. Therefore, through the multi-element synergistic co-doping effect, the catalyst weakens the adsorption energy of O–O* intermediates and promotes O 2 release, thereby lowering OER energy barriers in acidic conditions. This work opens an inspiring avenue for designing IrO x -based catalysts with high activity and low Ir usage.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 35
·16486-16500
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IF 3.5
Jiao Chuyu,Jiao Qirui,Zhang Wei,Ji Zhuo,Zheng Jiajun,Dai Weijiong,Wang Yan,Pan Meng,Li Ruifeng
Introduction of mesopore system into zeolite crystals is always deemed to be an effective strategy to improve diffusion and acidic accessibility. In this work, a hierarchically structured ZSM-5 with an ultra-small intracrystalline mesopore structure was prepared by using lysine as a pore-forming agent via a hydrothermal crystallization procedure. The structured and textured properties of the as-synthesized samples were characterized by XRD, SEM, EDS, TEM, NH 3 -TPD, FT-IR and N 2 adsorption–desorption isothermals. The results showed that a purely-phased hierarchical ZSM-5 zeolite with a size of 2–6 nm mesopore can be obtained under the condition of lysine/Al 2 O 3 = 2–8. The addition of lysine in the precursor not only generated an ultra-small mesopore system, but also had a significant effect on the acidity of the synthesized sample: With the increased amount of added lysine, the acid density and acid strength of the as-prepared zeolite catalyst were gradually weakened. The effects of the introduced hierarchical pore structure and the tailored acid sites on the catalytic performance of the catalysts were investigated during methanol dehydration to hydrocarbons reaction. The introduced hierarchical pores and the weakened strong acids significantly improved the stability of the catalyst. Meanwhile, the reduced acid density strongly inhibited hydrogen transfer of light olefins intermediate and then increased the selectivity toward light olefins on the hierarchical zeolite catalysts. Graphical abstract To overcome phase separation resulted from brittle combining forces between template and zeolite precursor, lysine, which is easily soluble in water and has a stable structure in the temperature range of ZSM-5 synthesis, served as a mesoporous template, and then, a hierarchical ZSM-5 zeolite was prepared in a hydrothermal method.
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THERMOCHIMICA ACTA
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2024
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IF 3.1
Zhen-Li Yang,Ya-Dong Yao,Jian-Guo Zhang,Qiang Xie,Feng Liu,Zhi-Wei He,Zu-Jia Lu
The construction and comprehensive characterization of energetic ionic salts 5-amino-3-hydrazinyl-1 H -1,2,4-triazolium diperchlorate (2) and 5-amino-3-hydrazinyl-1 H -1,2,4-triazolium 3-nitro-1,2,4-triazolate-5-one (3), which are based on 5-amino-3-hydrazinyl-1 H -1,2,4-triazole, were conducted. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were employed to explore the thermal and kinetic behaviors of the novel energetic ionic salts. An isoconversional approach and non-linear regression analysis were employed to propose accurate kinetic models for characterizing the decomposition of the energetic ionic salts based on the data from DSC and the most possible mechanism functions governing the decomposition of 2 and 3 was determined. Furthermore, experimental measurements and theoretical calculations were employed to examine diverse physicochemical characteristics, including densities, mechanical sensitivities, heat of formation as well as detonation parameters. The findings suggest that salt 2 exhibits a good detonation pressure of 37.4 GP and a satisfactory detonation velocity of 9031 m/s, exceeding RDX in terms of energy content and suggesting its potential as a viable high-energy explosive substitute for RDX. While salt 2 exhibits a slightly lower level of detonation performance than HMX, it possesses better sensitivity, which mean that salt 2 retains a considerable potential for valuable applications.
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RENEWABLE ENERGY
·
2025
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IF 9.1
Dongqi Liu,Wanni Liu,Xian Shi,Yuxin Wang,Xinyi Xing,Kai Huang,Siquan Xu
The catalytic conversion of cellulose into 5-hydroxymethylfurfural (HMF) is a viable way to achieve high-value utilization of renewable biomass energy. Herein, cheap, non-synthetic natural layered montmorillonite (MMT) was employed as a porous catalytic carrier. Through saturated hafnium ion exchange and subsequent sulfonation treatment, a bifunctional modified Hf/MMT-S solid acid catalyst was obtained, and its morphology, crystal, texture, acidity, elemental state and thermal stability were studied in detail. In a water (NaCl) /tetrahydrofuran biphasic system, Hf/MMT-S catalyzed the cellulose to achieve a 50 % HMF yield. The specific catalytic pathway was also depicted by the captured intermediates, namely the ring-opening isomerization of glucose into fructose, followed by the ring-closing dehydration of fructose, accompanied by C 3 -C 24 by-product molecules. Furthermore, the modified solid acid Hf/MMT-S catalyst still exhibited certain catalytic performance after being consecutively recycled for five times. More importantly, the entire catalytic system was capable of achieving full recovery of all components (catalyst, solvent, additive, product) through simple filtration, distillation and extraction methods without reagent waste. This study provided a reference for the active site regulation strategy of clay-based catalysts and also contributed to the high-value utilization prospects of renewable cellulosic energy.
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Inorganics
·
2025
·Vol. 13
·期 8
·272
·
IF 3
Juan Du,Xiang Wan,Caixiong Song,Kangsheng Wu,Wenbing Yang,Beiye Liu,Qi Yang,Jingjing Fang,Ayesha Razzaq
Crystal twinning, a common growth phenomenon, can substantially affect material performance in fields such as semiconductors, nonlinear optics, and drug development, yet its elimination during crystallization is challenging. This study presents a method for the controlled synthesis of ZSM-5 zeolite as either single crystals or twinned crystals using kaolin as the primary raw material. The method leverages the etching effect of ammonium fluoride (NH4F) on the aluminosilicate structure derived from pre-treated kaolin. By adjusting the concentrations of NH4F and the structure-directing agent tetrapropylammonium bromide (TPABr), pure ZSM-5 single crystals and twinned crystals were selectively synthesized. Conventionally, NH4F is employed to introduce defects into zeolite structures. In contrast, this work demonstrates its utility in controlling crystal habit. The synthesis utilizes kaolin, an abundant and low-cost aluminosilicate mineral, to provide the entire aluminum source and a portion of the silicon source, offering an economical alternative to expensive precursors like aluminum isopropoxide. The resulting single and twinned crystals exhibited high crystallinity, demonstrating the viability of using natural minerals to produce high-quality zeolites. The physical and chemical properties of the kaolin-derived ZSM-5 were characterized and compared to those of ZSM-5 synthesized from conventional chemical reagents. A growth mechanism for the formation of single and twinned crystals is also proposed.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Chengzhi Zhang,Taofeng Li,Xuhui Wang,Ying Chen,Junfeng Liu,Yong Wang
Critical challenges associate with zinc anodes, including dendritic growth and uncontrollable side reactions, severely hinder the long-term cycling stability of aqueous zinc-ion batteries (AZIBs). To address these issues, we propose an interfacial engineering strategy by constructing functional coating layers on Zn anode surfaces. Building upon the hydrophobic metal-organic framework-5 ( MOF-5) coating, we further introduce zincophilic -NH 2 groups to develop amino-modified MOF-5 (NMOF-5) coatings, which synergistically combine the hydrophobic protection of MOF-5 with accelerated Zn 2+ transport. Experimental results demonstrate that the NMOF-5 interlayer offers high interfacial ion transport capability, promotes uniform Zn deposition, and effectively suppresses hydrogen evolution reaction and corrosion. Remarkably, even with an ultra-thin Zn foil (20 μm), the NMOF-5@Zn symmetric cell achieve exceptional cycling stability, delivering a lifespan exceeding 2000 h at 1 mA cm −2 /1 mAh cm −2 , while the NMOF-5@Zn//Cu half-cell maintained a high Coulombic efficiency of 99.8 % over 1000 cycles. Furthermore, the NMOF-5@Zn//VOH full cell retain substantial capacity retention after 1000 cycles at 5 A g −1 . These findings highlight the superiority of functional interlayer strategy, providing critical insights for developing high-performance and long-cycling AZIBs.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2025
·
IF 2.4
Huimin Li,Yucheng Lin,Liutao Hou,Yuli Wang,Huijuan Tian,Shiqiang Zhao,Chun Chang
BACKGROUND 5-Hydroxymethylfurfural (HMF), as an important biomass platform compound, can be transformed into biofuels and numerous high value-added chemicals, and occupies an extremely important position in biorefining. Herein, a novel catalytic system has been developed for the direct conversion of glucose to HMF using inexpensive Na 2 SO 4 /NH 4 HSO 4 as the catalyst. RESULTS The maximum glucose conversion of 90.77% with 45.05% yield of HMF was obtained at 190 °C, catalyst Na 2 SO 4 /NH 4 HSO 4 80 wt%, water and methyl isobutyl ketone volume ratio 1/5, and residence time 20 min. A kinetics model was developed to predict the yield of HMF and glucose conversion, which was consistent with the experimental results. CONCLUSION The continuous production of HMF from glucose can be efficiently performed with Na 2 SO 4 /NH 4 HSO 4 with a mass ratio of 3/2 as the catalyst. This catalytic system for the continuous production of HMF has great practical significance and potential economic value for promoting the industrial production of HMF and its derivatives. © 2025 Society of Chemical Industry.
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