JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Linyan Bian,Licheng Liang,Yanping Fan,Xianyun Liu,Fei Liang,Qiuming Peng,Shumin Han,Lili Liu,Baozhong Liu
Designing and constructing the active center of Ru-based catalysts is the key to efficient hydrolysis of ammonia borane (NH 3 BH 3 , AB) for hydrogen production. Herein, V-doped Ru/Ti 2.5 V 0.5 C 2 dual-active center catalysts were synthesized, showing excellent catalytic ability for AB hydrolysis. The corresponding turnover frequency value was 1072 min −1 at 298 K, and the hydrolysis rate r B of AB was 235 × 10 3 mL·min −1 ·g Ru –1 . X-ray photoelectron spectroscopy results indicated that the interaction between V-doped Ti 3 C 2 and catalytic metal Ru transfers electrons from Ti to Ru, resulting in electron-rich Ru species. According to density functional theory calculations, the activation energy and reaction dissociation energy of the reactants AB and H 2 O on V-doped catalysts were lower than those of Ru/Ti 3 C 2 , thus optimizing the catalytic kinetics of AB hydrolysis. The modification strategy of V-doped Ti 3 C 2 provides a new pathway for the development of high-performance catalysts for AB hydrolysis.
研究领域:
材料科学
·
催化化学
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xingying Xue,Zhiwen Qi,Zhihong Wang,Ran Tao,Hao Zhou,Hongxia Chen,Jiandu Lei,Chengzhang Wang
In this study, magnetic nanocarriers (DU@Fe, D avg = 281.6 nm, zeta potential −28.0 mV) were fabricated using dextran, urushiol as the shell and superparamagnetic iron oxide nanoparticles (SPIONs) as the core. Subsequently, the specific ligand Lys-D-Ala-D-Ala of vancomycin (Van) was grafted onto the surface of DU@Fe, which generated nanoparticles (Lys-D-Ala-D-Ala@DU@Fe) with an average particle size of 385.5 nm and a zeta potential of −16.8 mV via specific and robust interaction. Ultimately, the immobilization capacity of Van reached up to 294.1 mg·g −1 for efficient antibacterial properties. Moreover, the assembly process adhered to the pseudo-second-order kinetics model ( R 2 = 0.998–0.999) and the Langmuir adsorption isotherm model ( R 2 = 0.999, 30 °C). Notably, V@DU@Fe effectively adhered to the cell envelopes of both Gram-negative and Gram-positive bacteria, achieving rapid bactericidal effects within 1 h. Furthermore, it maintained over 85.0 % of its initial antibacterial efficiency against S. aureus and S. epidermidis even after six recycles. Therefore, this study provides strategies and methods for the development of urushiol-dextran intelligent SPIONs nanomedicines.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Nan Jiang,Boyu Du,Di Gao,Zengbin Chai,Chao Liu,Xing Zhu
Herein, we synthesize the ZnAl-LDHs/NH 2 -MIL-125 composite via in situ growth of Ti-based metal–organic framework (MOFs) using layered double hydroxide (LDHs) as a carrier. The composite exhibits excellent performance for As(V) removal, achieving an adsorption capacity of 1634.0 mg/g in wastewater with an As(V) concentration of 1500 mg/L at pH of 10. The porous flower-like structure of the composite inherits the benefits of both the spatial structure of MOFs and the arsenic-affinity of LDHs. This results in an abundant active surface containing –OH, –NH 2 , M–O–M, and –COO– species, collectively contributing to As(V) adsorption. The adsorption progress governing As(V) removal follows the Langmuir isotherm and pseudo-second-order (PSO) kinetic models, revealing a monolayer and chemisorption mechanism. This study showcases the feasibility of the in situ growth of a MOF on LDHs to synthesize high-capacity adsorbents, offering a potential solution for As(V) removal from wastewater.
研究领域:
环境科学
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材料科学
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Tao Wang,Junling Yu,Jianmin Liu,Feng Jiang,Guo Feng,Jian Liang,Lifeng Miao,Quan Zhang,Qian Wu,Xinbin Lao
A fluorine-free route has been developed to fabricate V/Pr co-doped zircon (ZrSiO 4 ) ceramic pigments with Na 3 VO 4 and Pr(NO 3 ) 3 ·6H 2 O as colourants . The as-prepared pigments were characterized by XRD , Raman, XPS , UV–vis, FE-SEM, TEM and automatic colourimeters . The results show that Na 3 VO 4 can not only act as colourant to produce blue hue, but as mineralizer to accelerate the formation of V/Pr co-doped ZrSiO 4 pigment. A colour tuning between blue, green and yellow can be achieved by increasing the mole ratio of Pr/V, and the most intense yellow hue (L* = 74.55, a* = −0.38, b* = 46.82) is obtained at a mole ratio of Pr/V = 0.5. Both Pr 4+ and Pr 3+ cations are co-existed in the pigments, where Pr 4+ contributes to the generation of yellow hue while Pr 3+ undermines the yellow hue. The good chromatic ability in glaze at high temperature suggest its potential application in ceramic decoration.
研究领域:
材料科学
·
陶瓷工程
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BIOMACROMOLECULES
·
2017
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IF 5.246
Yang Pan,Xiaoting Ren,Shuang Wang,Xin Li,Xianglin Luo,Zongning Yin
To alleviate the hemorrhagic side effect of thrombolysis therapy, a thrombus targeted drug delivery system based on the specific affinity of Annexin V to phosphatidylserine exposed on the membrane surface of activated platelet was developed. The amphiphilic and biodegradable biomaterial, polycaprolactone-block-poly(2-(dimethylamino)ethyl methacrylate)-block-poly(2-hydroxyethyl methacrylate) (PCL-b-PDMAEMA-b-PHEMA (PCDH)) triblock polymer, was synthesized via ring opening polymerization (ROP) and atom transfer radical polymerization (ATRP) to use as the nanocarriers of thrombolytic drug. In order to conjugate Annexin V to the polymer, PCDH was modified by succinic anhydride via ring-opening reaction to introduce the carboxyl group (PCDH-COOH). After preparation of PCDH/PCDH-COOH (9/1, m/m) mixed micelles, Annexin V was coupled with the micelles using carbodiimide chemistry. The blood clot lysis assay in vitro confirmed that lumbrokinase-loaded targeted micelles (LKTM) had stronger thrombolysis potency than free lumbrokinase (LK) and LK-loaded nontargeted micelles (LKM, P < 0.05). In vivo thrombolytic assay, multispectral, optoacoustic tomography (MSOT) was used to assess the target ability of LKTM. The results of MSOT images indicated the fluorescence intensity of the LKTM group located in the blood clot position were significantly stronger than the LKM group. A 5 mm of carotid artery containing blood clot was cut out 24 h later after administration to assess the degree of thrombolysis. The results of thrombolytic assay in vivo were consistent with the assay in vitro, which the differences between LK, LKM, and LKTM groups were both statistically significant. All the results of thrombolysis assays above proved that the capacity of thrombolysis in the LKTM group was optimal. It suggested that Annexin V-conjugated micelles will be a potential drug delivery system for targeted thrombolysis.
研究领域:
药学
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纳米技术
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生物医学工程
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药物递送
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IONICS
·
2026
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IF 3.4
Wu Keying,Tang Haiwen,Liu Yao,Wang Dan,Jiang Jinjin,Yu Liusi,Wang Sujun,Chen Lei,Tang Kai
LiCoO₂ (LCO) cathodes suffer from severe interfacial degradation, including cobalt dissolution, oxygen loss, and structural collapse, when cycled at high voltages (> 4.6 V), which limits their practical application. To address this issue, we propose a heterojunction engineering strategy via surface coating with lithium zirconium phosphate (Li₂Zr(PO₄)₂, LZP). The optimized LCO@LZP cathode delivers an ultrahigh initial discharge capacity of 178.1 mAh·g − 1 at 1 C (3.0–4.6 V) and retains 86.3% of its capacity after 200 cycles, significantly outperforming bare LCO (76.0%). It also exhibits enhanced rate capability (108.7 mAh·g − 1 at 10 C) and near-complete capacity recovery (99.7%) upon returning to 0.1 C. Mechanistic studies reveal that the LZP coating stabilizes lattice oxygen through robust Zr–O and P–O bonds, suppresses electrolyte decomposition to form a thin and inorganic-rich cathode electrolyte interphase (CEI), and enhances Li + diffusion kinetics (DLi + = 8.51 × 10 − 12 cm 2 ·s − 1 , 2.4 times higher than bare LCO). DFT calculations further confirm that the LCO/LZP heterojunction reduces oxygen charge compensation and creates an internal electric field that facilitates ion transport while inhibiting electron leakage. This work provides a scalable surface-modification strategy for developing high-energy-density LCO cathodes for next-generation lithium-ion batteries.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 45
·16963-16973
·
IF 4
Qingxiang Kong,Junli Wang,Zhenwei Liu,Song Wu,Xiaoning Tong,Naixuan Zong,Bangfu Huang,Ruidong Xu,Linjing Yang
As a non-noble metal electrocatalyst for the oxygen evolution reaction (OER), the binary NiFe layer double hydroxide (LDH) is expected to replace Ru-based and Ir-based anode materials for water decomposition. To attain threshold current density, nevertheless, a somewhat significant overpotential is still needed. In this work, layered double hydroxides of NiFe LDH are doped with V to form the terpolymer NiFeV LDH, which greatly increases the intrinsic activity of NiFe LDH and improves OER performance. This process is a straightforward and quick one-step electrodeposition process. Notably, NiFeV/NF has a low overpotential (218 mV at 10 mA cm−2) and faster kinetics (Tafel slope of 31 mV dec−1) as well as excellent durability and stability in 1 M KOH solution. In addition, the OER performance of the catalyst prepared in this work is better than that of a non-valuable metal catalyst that was recently reported. The V-doped NiFe LDH layered double hydroxides and the investigation of electrodeposition electrocatalytic methods in this work offer a fresh opportunity for the advancement of electrochemical technology.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yutong Duan,Xianjia Peng,Xingyun Hu
Vanadium is a kind of heavy metal pollutant listed as priority control by various countries, but it is also a strategic valuable metal. The current treatment of vanadium-containing wastewater suffers from the waste of vanadium resources and produces large volumes of hazardous wastes . An innovative approach was proposed to address these problems. The method involved selectively recovering vanadium from wastewater using Bi 2 O 3 and preparing Bi-V photocatalyst in situ. By optimizing the conditions, the recovery efficiency of pentavalent vanadium (V(V)) was 99.6%. The recovered product was determined to be 1.14*Bi 2 O 3 @BiVO 4 , and it was proved to be a heterojunction structure by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The band gap was calculated to be 2.32 eV by UV–vis analysis. Under visible light, the degradation rate and efficiency of AO7 by 1.14*Bi 2 O 3 @BiVO 4 was 0.906 h −1 and 84.86%, respectively. The degradation pathway of AO7 was also revealed. The improved photocatalytic performance of the Bi 2 O 3 @BiVO 4 could be attributed to the p-n heterojunction, excitating ·O 2 − and ·OH under visible light. Thus, this method solved the problem of both vanadium discharge in wastewater and the difficulty of vanadium resource utilization, and had practical utilization value.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yezi He,Jerosha Ifthikar,Lie Yang,Zhuqi Chen
A cross-linked chitosan-modified birch sawdust biochar (CS@BSBC) was prepared and applied for the simultaneous elimination of vanadium (Ⅴ) and sulfamethoxazole (SMX) from livestock wastewater. The adsorption capacity of V(V) reached 110 mg/g alone while this value was promoted to 150 mg/g for the simultaneous removal of SMX and V(V), and the adsorption effect is optimal at pH 3. The adsorption capacity of SMX reached about 30 mg/g alone, while the SMX’s adsorption capacity droped to 25 mg/g for the simultaneous removal of SMX and V(V). The mechanism studies disclosed that redox reactions occur on the surface of CS@BSBC. As revealed by the XPS spectra, 63 % of V(V) was reduced to V(IV) concurrently pyrolic nitrogen and C−O terminals were oxidized to nitrogen oxide and C O. The treatment mechanism of CS@BSBC described above can provide a reference for the subsequent treatment of livestock wastewater with complex composition and high vanadium content.
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JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Borong Wu,Yonghuan Ren,Daobin Mu,Xiaojiang Liu,Feng Wu
LiNi 0.5 Mn 1.5 O 4 electrode modification is achieved in this work through adding inorganic lithium carbonate (Li 2 CO 3 ) into carbonate electrolyte. Superior cyclic stability of the cathode in the range of 5–2 V is attained, a capacity of 0.3698 mAh g −1 is lost per cycle, which is half of the value in the Li 2 CO 3 -free condition. The capacity loss above and below 3.5 V are both alleviated in the presence of Li 2 CO 3 . Its effect on both the electrolyte bulk and the cathode surface is analyzed with SEM , TEM and XPS measurements. The density functional theory (DFT) calculation is carried out to discuss the modification mechanism. It is speculated that Ni 4+ ⋯CO 3 2− coordination may be formed through the interaction between Ni and O, weakening the oxidizability of Ni 4+ on the electrode surface . In addition, Li 2 CO 3 can consume PF 5 in the electrolyte. The interphase film can also maintain thin and steady during the cycling within 5–2 V.
研究领域:
材料科学
·
电化学
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 19
·2212150
·
IF 19
Zhongsheng Wang,Chunlei Zhu,Jiandong Liu,Xinhong Hu,Yulu Yang,Shihan Qi,Huaping Wang,Daxiong Wu,Junda Huang,Pengbin He,Jianmin Ma
Tailoring inorganic components of cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI) is critical to improving the cycling performance of lithium metal batteries. However, it is challenging due to complicated electrolyte reactions on cathode/anode surfaces. Herein, the species and inorganic component content of the CEI/SEI is enriched with an objectively gradient distribution through employing pentafluorophenyl 4-nitrobenzenesulfonate (PFBNBS) as electrolyte additive guided by engineering bond order with functional groups. In addition, a catalytic effect of LiNi 0.6 Mn 0.2 Co 0.2 O 2 (NCM622) cathode is proposed on the decomposition of PFBNBS. PFBNBS with lower highest occupied molecular orbital can be preferentially oxidized on the NCM622 surface with the help of the catalytic effect to induce an inorganic-rich CEI for superior electrochemical performance at high voltage. Moreover, PFBNBS can be reduced on the Li surface due to its lower lowest unoccupied molecular orbital , increasing inorganic moieties in SEI for inhibiting Li dendrite generation. Thus, 4.5 V Li||NCM622 batteries with such electrolyte can retain 70.4% of initial capacity after 500 cycles at 0.2 C, which is attributed to the protective effect of the excellent CEI on NCM622 and the inhibitory effect of its derived CEI/SEI on continuous electrolyte decomposition.
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Materials
·
2022
·Vol. 15
·期 24
·8936
·
IF 3.748
Zhi Deng,Zhenhua Huang,Jun Liu,Yongkui Huang,Peili Lu
Advanced oxidation processes (AOPs) based on peroxymonosulfate (PMS) activation have been developed as an ideal pathway for completely eradication of recalcitrant organic pollutants from water environment. Herein, the V-doped graphitic carbon nitride (g-C3N4) is rationally fabricated by one-step thermal polymerization method to activate PMS for contamination decontamination. The results demonstrate the V atoms are successfully integrated into the framework of g-C3N4, which can effectively improve light absorption intensity and enhance charge separation. The V-doped g-C3N4displays superior catalytic performance for PMS activation. Moreover, the doping content has a great influence on the activation performances. The radical quenching experiments confirm •O2−, SO4•−, andh+are the significant species in the catalytic reaction. This work would provide a feasible strategy to exploit efficient g-C3N4-based material for PMS activation.Keywords:g-C3N4;advanced oxidation processes;photocatalysis;peroxymonosulfate;organic contamination
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