JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Xingyu He,Xiaobo Min,Xubiao Luo
The adsorption performance of the amino modification of zirconium metal–organic framework (UiO-66(NH2)) for the removal of antimony (Sb) from aqueous solution has been investigated. The influence of equilibrium concentration, solution pH, temperature, and contact time on the Sb adsorption were investigated by the batch method. Compared with original UiO-66, the UiO-66(NH2) adsorption capacity for Sb(III) and Sb(V) increased to 61.8 mg/g and 105.4 mg/g for Sb(III) and Sb(V), although the surface area of UiO-66(NH2) decreased from 486.31 m2/g to 113.46 m2/g. The adsorption equilibrium data of Sb on UiO-66(NH2) fitted well with the Langmuir adsorption model, and the kinetics data fitted well with the second-order adsorption model. Thermodynamic parameters indicated that adsorption processes of Sb were feasible, endothermic, and spontaneous. The adsorption isotherm parameters indicated that the Sb adsorption data fitted well with the Langmuir model. The mean adsorption energy obtained from the Dubinin–Radushkevich (D–R) isotherm model further revealed that the Sb adsorption process was chemisorption. Additionally, FTIR analysis and X-ray photoelectron spectroscopy (XPS) study revealed that the Zr–O bond and amino group played a significant role in the Sb removal. Thus, UiO-66(NH2) is a promising candidate for Sb contaminated water remediation on the basis of low-cost, easy availability, high Sb adsorption capacity, nontoxicity, and high stability.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Jinping Mu,Xiaohui Li,Rui He,Lijing Sun,Xue Bai,Lihui Zhang,Peng Liu,Zhenfa Liu,Jing Gao,Aijia Wei
High-voltage lithium-ion batteries (LIBs) with LiNi 0.5 Mn 1.5 O 4 (LNMO) cathode are considered promising energy sources due to their high energy density . However, enhancing the stability of the electrode/electrolyte interface remains critical for the practical application of LIBs. In this work, lithium-containing inorganic phosphates (LiPO 3 , Li 3 PO 4 , and LiH 2 PO 4 ) were used as multifunctional inorganic additives to improve the stability of the electrode/electrolyte interface in 5.0 V, LNMO-based LIBs with carbonate-based electrolytes. Based on theoretical calculations and experimental evaluations of the electrochemical performance , LiPO 3 was selected as the optimal additive for further study in LNMO/Li and LNMO/Li 4 Ti 5 O 12 cells. The LNMO/Li half-cells with LiPO 3 delivered an initial discharge capacity of 108.8 mAh∙g −1 and retained a capacity of 94.9 % after 500 cycles at 5C, compared to 75.1 mAh∙g −1 and 79.4 % for the standard electrolyte. The increased cycling stability was ascribed to the ability of the multifunctional, film-forming LiPO 3 additive to form stable interfacial films on both the cathode and anode , thus, inhibiting side reactions between the electrodes and electrolyte. Moreover, as an HF scavenger, LiPO 3 reduced the HF content in the electrolyte to ensure the structural integrity of LNMO and inhibit the dissolution of transition metal ions . In the LNMO/Li 4 Ti 5 O 12 full cells, the addition of LiPO 3 effectively enhanced the cycling performance, and the capacity retention after 400 cycles at 5C was 79.1 %, compared to only 12.3 % for the standard electrolyte. Considering its simplicity, low cost, and feasibility, the addition of LiPO 3 as a multifunctional electrolyte additive showed excellent prospects for commercial applications.
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Advanced Healthcare Materials
·
2024
·
IF 10
Jianshuai Bao,Zengyin Li,Deliang Wang,Jiefei Wang,Guan Huang,Jianlei Qian,Xiaoyan Yang,Peng-Cheng Duan,Sheng Zhang,Feng Bai,Yong Zhong
Near-infrared second region (NIR-II) fluorescence imaging provides enhanced tissue penetration, achieving efficient NIR-II fluorescence and photoacoustic imaging (PA)-guided photothermal therapy (PTT) all in one material remains a challenging yet promising approach in cancer treatment. Herein, open-shell V═O metalloradical complex (VONc) is self-assembled into VONc nanospheres (VONc NPs). VONc NPs exhibit light absorption from 300 to 1400 nm, fluorescence spectra ranging from 900 to 1400 nm, and a distinct fluorescence signal even at 1550 nm. Moreover, VONc NPs exhibit outstanding photostability and a higher photothermal conversion efficiency of 46.6% than that of closed-shell zinc naphthalocyanine nanorods (ZnNc NRs). V═O centered metalloradical serves as transient electron-withdrawing groups to facilitate charge transfer (CT), introducing additional nonradiative energy dissipation pathways and enhancing efficient heat generation. In vitro experiments of VONc NPs indicate that a highly effective photothermal action causes harm to both mitochondria and lysosomes, resulting in the death of tumor cells, closed-shell ZnNc NPs exhibit almost no cell killing as contrast. In vivo anti-tumor therapy results of VONc NPs demonstrate excellent NIR-II fluorescence imaging-guided PTT against tumors with a favorable biosafety profile. “Centered metalloradical boosting CT” toward open-shell metal complexes provides significant insight for developing single-material integrated nanosystems for diagnostic and therapeutic applications.
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PubMed
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Dajian Li,Alfin Kurniawan,Tania Roy,Jin Wang,Cheng lan Liu,Ze Zhen Wang,Rong Zhen Mu,Chun Hui Zhou
The efficient production of allyl alcohol from glycerol is of great importance due to its significance as a valuable intermediate in chemical industries. While catalytic conversion of glycerol to allyl alcohol by solid acid catalysts, carbon deposition (coking) is prone to occur on the catalyst surface, leading to slow down the conversion process and fast deactivation of the catalyst. In this study, we obtained an efficient catalyst for the preparation of allyl alcohol from gas-phase glycerol by controlling the pore structure and surface acidity of the catalyst. The characterization results showed that hydrochloric acid and citric acid removed the silicon and aluminium elements from montmorillonite, and the acidity, pore volume, and surface area ratio of Na-MMT (SBET=34.5 m2 g-1, VT=0.19 cm3 g-1) of the porous montmorillonite(HA1MMT) catalyst were all improved (SBET=97.9 m2 g-1, VT=0.28 cm3 g-1); After adding MoOx and VOx, the selectivity of Mo/V-HA1MMT catalyst for allyl alcohol was improved. The XPS characterization results indicate that the synergistic effect of Mo and V can promote the transfer of electrons during the reaction process of glycerol conversion. Within 480 minutes of catalyzing glycerol dehydration reaction, Mo0.6V0.4(5)-HA1MMT was almost deactivated (Conv.= 19.5%, Sel.allyl alcohol=31.2%) due to carbon deposition. When the catalyst was doped with calcium and magnesium components, a new active phase CaMo4 was discovered on the catalyst, and the acidity of Ca0.5Mg0.5-Cat. (Cat. is Mo0.6V0.4(5)-HA1MMT) decreased to 214.0 μmol g-1. The coking resistance performance of Ca0.5Mg0.5-Cat. was improved, and after 660 minutes of reaction, the catalyst was deactivated (Conv.= 32.1%, Sel.allyl alcohol=30.1%) due to carbon deposition. During the 3rd catalyst regeneration test, Ca0.5Mg0.5-Cat. still maintained high activity (Conv.= 63.3%, Sel.allyl alcohol=35.2%, Sel.acrolein=31.2%). The results of this study indicate that suitable pore structure and acidity are crucial for designing a catalyst with coking resistance properties.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xin Tang,Ruipeng Mao,Fan Zhang,Yongzhong Jin,Wei Su,Wu Jiang,Junhao Wang
Cemented carbides play a pivotal role in diverse industrial sectors, and controlling abnormal grain growth and regulating the homogeneity of the Co binder phase are the key challenges to improve their properties. In this study, WC-10Co alloy was prepared for the first time by low-pressure sintering technique using (Ti, Cr, V, Nb, Mo)(C, N) high entropy powder as an inhibitor, focusing on the effect of trace additions of (Ti, Cr, V, Nb, Mo)(C, N) on the microstructure and mechanical properties of the alloy as well as friction and wear properties. The results show that under the conditions of sintering at 1420 ℃, a pressure of 3 MPa, and a holding time of 1 hour, the alloy with 0.2 wt.% high-entropy inhibitor exhibited the best comprehensive properties, with a flexural strength of 3752 MPa, a Vickers hardness of 1679 HV 30 , and a fracture toughness of 13.07 MPa·m 1/2 . During the stable stage of tribological testing, the average friction coefficient reached 0.6195, and the wear rate was as low as 1.34×10 -7 mm 3 /(N·m). The toughening and strengthening mechanism of the (Ti, Cr, V, Nb, Mo)(C, N) - modified alloy is mainly attributed to the significant refinement of WC grains, WC lattice contraction, and the formation of Co-based solid solutions by the high-entropy inhibitor. However, excessive addition deteriorates the overall performance. This study provides experimental data and technical insights for the development of a new generation of cemented carbides with high strength, high toughness, and excellent wear resistance.
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Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 4
·286
·
IF 21.8
Mao Gaoqiang,Lu Jingfan,Cai Haiyan,Yu Wanjing,Tong Hui,Guo Xueyi,Zeng Leiying,Jiang Long
Increasing the operating voltage can significantly increase the energy density of LiCoO 2 , but it is accompanied by severe structural damage and interface degradation. Especially at a high voltage above 4.5 V, LiCoO 2 faces severe challenges, such as irreversible phase transition, lattice oxygen loss, and electrode–electrolyte interface evolution. Herein, a high-voltage LiCoO 2 cathode material with bulk doping and surface coating synergistic modification was designed and prepared. The doped Mg 2+ ions entered the lithium layers as pillars, stabilizing the layered framework. Meanwhile, Li 1.3 La 0.3 Ti 1.7 (PO 4 ) 3 was uniformly coated on the surface of LiCoO 2 , which is beneficial for suppressing Co 3+/2+ ion leaching and interface side reactions during cycling. Furthermore, Li 1.3 La 0.3 Ti 1.7 (PO 4 ) 3 is a fast ion conductor, which facilitates the rapid transport of lithium ions on the surface of the cathode material. Owing to the synergistic effect of Mg 2+ ion doping and Li 1.3 La 0.3 Ti 1.7 (PO 4 ) 3 coating, the orbitals of Co 3d and O 2p in LiCoO 2 crystal are changed, and the irreversible phase transition and oxygen loss are inhibited. The modified material exhibited an excellent electrochemical performance. A discharge capacity of 175.5 mAh·g −1 at 10 C rate, as well as a capacity retention of 90.14% after 200 cycles at 1 C rate, was achieved in the modified material. This work supplies a new method for developing high-voltage oxide cathodes through bulk and interfacial modification.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2025
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IF 6.2
Yingna Li,Muhammad Sajjad Ahmad,Pei Gao,Yu Zhang,Mingtao Yang,Xiaolan Zhao,Boxiong Shen
This study examined the catalytic pyrolysis of melon seed shell (MSS) using vanadium tungsten modified ZSM-5 (V/W-ZSM-5) through combined experimental and theoretical methods. Thermogravimetric analysis (TGA) with model-free kinetics revealed that the catalyst lowered the activation energy by about 10 % (184–194 kJ mol⁻¹) compared with non-catalytic pyrolysis. Thermodynamic assessment showed reduced entropy (ΔS) values for conversion fractions below 0.7, indicating a more ordered and energy-efficient pathway. Product distribution from Py-GC/MS confirmed enhanced selectivity, with levoglucosan and furfural yields increasing nearly 5-folds and 3-folds, respectively. Density functional theory (DFT) clarified the mechanistic pathways: levoglucosan formed primarily via glucose dehydration, while furfural production followed xylose ring-opening and nucleophilic conversion. Collectively, these findings demonstrate that V/W-ZSM-5 not only improves selectivity toward high-value products but also reduces both kinetic and thermodynamic barriers, highlighting its potential for sustainable biomass valorization.
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-13
·
IF 3.8
Bu Daolu,Yang Hu,Zhang Haibo,Wang Liang,Wang Jiao,Liao Jie
The present study investigates the efficacy of newly developed Zr-based metal–organic frameworks, specifically MIP-206, and its amine-modified counterpart, MIP-206-NH 2 , for the re-covery of antimony (Sb) from both synthetic and actual mining wastewater. Batch method studies were employed to examine the effect of waste media pH, Sb concentration, process kinetics, and the performance of the regeneration solution. MIP-206-NH 2 exhibited impressive separation capabilities, achieving 102.18 mg/g and 63.23 mg/g for Sb (V) and Sb (III), respectively. In contrast, the pristine MIP-206 reached maximum values of 26.26 mg/g for Sb (V) and 16.95 mg/g for Sb (III). The separation process was well-described by the Langmuir equation, and the kinetics followed the pseudo-second-order model. Although the amine modification resulted in a decrease in the surface area of MIP-206 from 1345.21 to 1169.86 m 2 /g, SEM and XRD analyses confirmed that the structural integrity of MIP-206-NH 2 remained unchanged. In terms of reusability, MIP-206-NH 2 maintained up to 90% of its separation performance over 9 cycles, while MIP-206 demonstrated effectiveness for 7 cycles. The regeneration solution exhibited a capacity of approximately 0.63 mol/L for Sb (V) and 0.71 mol/L for Sb (III). Furthermore, MIP-206 and MIP-206-NH 2 demonstrated successful application in selectively separating Sb from real mining wastewater.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huan Su,Chao Shan,Xiaolin Zhang,Bingcai Pan
Chemical oxidation is essential in treating P(I)/P(III)-bearing wastewater, while conventional oxidation processes suffer from low selectivity and high cost induced by oxidant reagents. Herein, a low-cost catalyst PdNi 10 was developed to rival the noble metal Pd, which had been known as the only catalyst enabling chemical-free oxidation of P(I)/P(III) into P(V) by ambient O 2 . The PdNi 10 fabricated via optimized method even outperformed Pd in catalytic activity at identical dosage (0.10 g L −1 ), achieving efficient conversion of 1.00 mM of P(I) into P(V) (>94% in 30 min) with wide applicable pH range from 3.0 to 9.0. The aerobic oxidation of P(I) and P(III) over PdNi 10 was confirmed via scavenging experiments to be both dominated by non-radical pathways with apparent activation energies of 44.5 and 21.3 kJ mol −1 , respectively. Interestingly, the individual roles of Ni components of PdNi 10 in the catalytic oxidation were found negligible. The H 2 O-methanol binary solvent experiment suggested that H 2 O mediated the catalytic reaction and the interfacial OH groups as a result of H 2 O dissociation served as the main reactive oxidant species for P(I)/P(III) oxidation. Furthermore, synergistic mechanism was proposed for the Ni and Pd sites with favorable roles in the essential reaction steps of dehydrogenation and hydroxylation, respectively. This study is believed to advance the treatment strategy of P(I)/P(III)-rich wastewater and to shed new light on the development of low-cost catalysts enabling chemical-free aerobic oxidation processes under facile condition.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jingli Zhao,Xuesong Liu,Peng Liu,Kuan Deng,Xingbin Lv,Wen Tian,Caihong Wang,Shuai Tan,Junyi Ji
Oxygen vacancies occupation and coordination environment modulation of the transition-metal based electrodes are effective strategies to improve the structural stability and electrochemical performance. In this work, the 2-methylimidazole (2-MI) doped manganese dioxide (MnO 2 ) anchored on carbon cloth (CC) is fabricated via a simple method (MI-MnO 2-x /CC), where the oxygen defects on/inside the K + doped δ-MnO 2 nanosheets are in-situ created by reductive ethanol/Mn 2+ and occupied by 2-MI ligands. With the pre-embedded K + ions and abundant ligand-refilled defects, the electronic coordination structure, structural stability and electron/ion diffusion efficiency can be effectively enhanced. Therefore, the MI-MnO 2-x /CC reveals a remarkable specific capacitance of 721.2 mF cm −2 with excellent cycle durability (capacitance retention of 93.4% after 10,000 cycles) under 1.3 V operation potential window. In addition, an asymmetric supercapacitor assembled by MI-MnO 2-x /CC and activated mechanical exfoliated graphene oxide yields a maximum energy density of 57.0 Wh kg −1 and a highest power density of 23.0 kW kg −1 under 2.3 V. This effective oxygen defect stabilization strategy by ligands refilling can be extended to various metal oxide-based electrodes for energy storage and conversion.
研究领域:
材料科学
·
能源存储与转换
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PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Baitong Niu,Meihua Zhu,Hongxu Guo,Shaoming Ying,Xuguang Huang
A hexagonal prisms with hexagonal pyramid tips metal–organic frameworks (MOFs) modified V 2 O 5 nanoparticles , V 2 O 5 @MOF(V, Co) has been fabricated through a simple one-pot hydrothermal reaction and then characterized by XRD, FT-IR, FE-SEM, TEM, XPS and BET. The as-prepared V 2 O 5 @MOF(V, Co) composites were found to be an excellent electrode modification material for electrochemical detection of Pb 2+ in aqueous solution. Operational parameters such as pH, deposition potential, and deposition time, were also optimized to detect trace amounts of Pb 2+ . This study provides a feasible research method and practical strategy for sensitive and sensitive on-line detection of lead ions using novel MOFs composites.
研究领域:
材料科学
·
分析化学
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高影响因子
OPTICS COMMUNICATIONS
·
2026
·
IF 2.7
Xiangxu Wei,Jiamei Gu,Mingyu Li,Yuxia Song,Sai Jiang,Tuo Chen,Jian-Jun He
In modern biosensing systems, traditional sensing approaches face limitations such as high cost and bulky size. A V-cavity tunable laser (VCTL) with a quasi-continuous tuning range of 23 nm was realized by synchronously tuning the currents of two cavities. By connecting a Fabry-Perot Etalon (FPE) with four micro-ring resonators (MRRs) through a 1×4 coupler, an FPE cascaded MRR (FMRR) array was formed to generate the Vernier effect and enhance the sensing sensitivity. An optical switch is used to sequentially select the output signals from different sensing channels, enabling four-channel MRRs with only a single light source and a single detector. Experimental results show that, by monitoring the envelope peak shift in the transmission spectrum of the sensor array, a bulk refractive index (RI) sensitivity of 2881.48 nm/RIU is achieved, while the FMRR array exhibits human serum albumin (HSA) detection sensitivity of 2417.07 p.m./(μg·mL −1 ), confirming the potential of VCTL as low-cost interrogation sources for integrated optical sensing systems.
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危险品化学品经营许可证（带存储）