COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Rongchuang Geng,Hanxiao Tang,Qiujuan Ma,Luping Liu,Weisheng Feng,Zhijuan Zhang
In this work, a series of bimetallic Ag/Zn-ZIF-8 materials were successfully developed for sensing toward traces of Fe 3+ and Cu 2+ . The bimetallic Ag/Zn-ZIF-8 was synthesized via a one-pot method. Interestingly, this obtained bimetal Ag/Zn-ZIF-8 exhibited high photoluminescence property and excellent fluorescence quenching response to target analytes with high selectivity , sensitivity and detection limits of 3.9 μM for Fe 3+ , 6.7 μM for Cu 2+ ions, respectively, both of which have been confirmed to be very comparable or better than the reported LMOFs sensors. The possible photoluminescence quenching mechanisms were studied in detail, revealing that the competitive absorption of excitation source and resonance energy transfer (RET) resulted from the host (imidazole of the framework, Lewis basic sites)-guest (metal ions of Cu 2+ and Fe 3+ , Lewis acid sites) interaction should be responsible for high efficiency fluorescence quenching. The binding energies of metal ions adsorption on the ZIF-8 obtained by DFT simulation were further performed to explain the higher quenching effect of Fe 3+ than Cu 2+ .
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2013
·Vol. 13
·期 1
·409-416
·
IF 1.149
Zhang Wei-De,Zheng Yun-Min,Xu Yang-Sen,Yu Yu-Xiang,Shi Qing-Shan,Liu Lihong,Peng Hong,Ouyang Yousheng
In this work, a novel environmental-friendly waterborne polyurethane/ZnAl-layered double hydroxides/ZnO nanoparticles composite (WPU/ZnAl-LDHs/ZnO) was synthesized via in-situ polymerization. ZnAl-LDHs and ZnAl-LDHs/ZnO were synthesized by refluxing in an oil bath. In order to
disperse ZnAl-LDHs/ZnO homogeneously into WPU matrix, ZnAl-LDHs/ZnO was firstly functionalized by isophorone diisocyanate. The incorporated content of ZnAl-LDHs/ZnO in the composite has profound effect on such physical properties as mechanical strength, thermal stability and water swelling.
It is demonstrated that appropriate amount of ZnAl-LDHs/ZnO with good dispersion in the WPU matrix significantly improves the physical performance of the composites. Finally, the antibacterial activity of the composite was tested against G(−) Escherichia coli and G(+) Staphylococcus
aureus. The results indicate that WPU incorporated with ZnAl-LDHs/ZnO shows strong antibacterial activity upon contact.
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PubMed
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2022
·
IF 3.752
Biao ZENG,Chao XIONG,Wei WANG,Guo LIN,Song CHENG,Jun CHANG
A novel adsorbent (MTZ-MOFs) was synthesized by a one-step reaction of zinc nitrate hexahydrate and 1-(2-dimethylaminoethyl)-1H-5-mercaptotetrazole to remove mercury from waste water. The results showed that MTZ-MOFs had excellent selectivity and repeatability for Hg(II), the optimum pH was 3.0, the maximum adsorption capacity was 872.8 mg/g, and the process was a spontaneous exothermic reaction. The adsorption behavior was chemisorption, which conformed to the pseudo-second-order kinetic and Freundlich isothermal model. Moreover, the adsorption mechanism showed that the adsorption process mainly depended on ion exchange and chelation, and the synergistic action of S and N atoms played a key role. So, MTZ-MOFs were an efficient adsorbent for mercury ion removal.
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Materials
·
2021
·Vol. 14
·期 17
·4895
·
IF 3.623
Linqing Zuo,Haodong Sun,Xinhai Yuan,Juan Wen,Xi Chen,Shiyu Zhou,Yuping Wu,Teunis van Ree
The Zn/MnO2battery is a promising energy storage system, owing to its high energy density and low cost, but due to the dissolution of the cathode material, its cycle life is limited, which hinders its further development. Therefore, we introduced agar as a microskin for a MnO2electrode to improve its cycle life and optimize other electrochemical properties. The results showed that the agar-coating layer improved the wettability of the electrode material, thereby promoting the diffusion rate of Zn2+and reducing the interface impedance of the MnO2electrode material. Therefore, the Zn/MnO2battery exhibited outstanding rate performance. In addition, the agar-coating layer promoted the reversibility of the MnO2/Mn2+reaction and acted as a colloidal physical barrier to prevent the dissolution of Mn2+, so that the Zn/MnO2battery had a high specific capacity and exhibited excellent cycle stability.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Aihua Xiang,Yifan Li,Lidong Qiao,Kun Liu
The remediation of heavy metals (HMs) contaminated soils is crucial for safeguarding environmental health and ensuring agricultural safety. This study presents a novel strategy for the co-remediation of HMs contaminated soils and the simultaneous enhancement of soil fertility through the use of a tailing-derived composite material. A silica-supported hydrotalcite material (SHM) was synthesized from solid waste through a coprecipitation method followed by atmospheric hydrothermal treatment. SHM was functionalized as a carrier for nitrogen (N), phosphorus (P), and potassium (K) nutrients to fabricate a slow-release fertilizer (SRF). SHM exhibited a typical hydrotalcite-like layered structure, a high specific surface area (199.03 m 2 /g), and a mesoporous architecture that facilitates nutrient retention and HMs uptake. Pot experiments demonstrated that 1 % and 2 % SRF significantly enhance plant growth while effectively reducing the uptake of Pb by 71.51 %-85.29 % and that of Zn by 14.54 %-53.36 %. Moreover, SRF application markedly reduced the bioavailability and leaching potential of Pb and Zn, promoting their transition from soluble and exchangeable fractions to more stable iron-manganese oxide-bound and residual forms. The formation of phosphate precipitation serving as the primary adsorption mechanism after SRF application. SHM derives from tailings exhibit significant potential as efficient dual-functional amendments for sustainable soil remediation and nutrient management.
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JOURNAL OF ELECTRONIC MATERIALS
·
2026
·
IF 2.8
Wang Chujun,Wang Youyi,Qian Shiyi,Qin Jiayu,Liu Yizhi,Feng Yongzhen,Wu Feimei,Wu Zhongcai,Zheng Hui
The development of high-performance microwave absorbers is essential for mitigating electromagnetic pollution. M-type barium ferrite (BaFe 12 O 19 ) exhibits excellent chemical stability and strong magnetic anisotropy; however, its application is hindered by poor impedance matching and low dielectric loss. Here we show that co-doping with Zn and Zr in BaZn x Zr x Fe 12−2x O 19 , combined with coupled strain and defect engineering, effectively addresses these limitations. Co-doping induces lattice expansion, grain refinement, and the formation of point defects such as oxygen vacancies and Fe 2+ /Fe 3+ redox pairs, which enhance interfacial polarization and ferromagnetic resonance. At x = 0.3, the material achieves optimal impedance matching and a high attenuation constant, with a minimum reflection loss of − 29.26 dB at 12.16 GHz and an effective absorption bandwidth of 3.64 GHz. This remarkable performance surpasses that of conventional single-dopant systems, resulting from the synergistic enhancement of defect-induced dipole polarization, grain-boundary-mediated interfacial polarization, and ferromagnetic resonance, collectively optimizing attenuation while preserving near-unity impedance matching. These findings establish Zn–Zr co-doping as a promising strategy for developing next-generation microwave absorbers with environmental stability.
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Catalysis Science & Technology
·
2019
·Vol. 10
·期 3
·835-843
·
IF 5.726
Yan Zhang,Shide Wu,Xia Xu,Heqing Jiang
Rapid deactivation by coke deposition is the main obstacle of ethane aromatization over Zn/ZSM-5. In this work, using the prepared nanosized Zn/HZSM-5, an almost threefold product yield and significantly improved stability were achieved in comparison with those of the microsized catalyst. XRD and XPS analyses indicated that a higher percentage of reactive [ZnOZn]2+ species was maintained during ethane aromatization over nano-Zn/HZSM-5 than micro-Zn/HZSM-5. In addition, the evolution of carbon deposits over nanosized and microsized Zn/ZSM-5 was investigated during prolonged ethane aromatization reaction using Raman spectroscopy and thermogravimetry measurements. Compared to the microsized catalyst, the nanosized zeolite facilitated the faster escape of light aromatics and the precursors of carbon deposits from the zeolite pores, thus suppressing the accumulation of coke deposits and improving the catalyst stability. Based on the nanosized Zn/HZSM-5, a protocol of isothermal reaction followed by regeneration was developed by periodically removing carbonaceous deposits, and an ∼25–35% product yield was achieved after 10 reaction–regeneration cycles.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Hongrui Huang,Qianqian Liang,Guangchao Li,Huajun Guo,Zhixing Wang,Guochun Yan,Xinhai Li,Hui Duan,Jiexi Wang
Rechargeable Zn–air batteries (RZABs) are poised for industrial application, yet they require low-cost, high-performance catalysts that efficiently facilitate both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). The pivotal challenge lies in designing multimetal active sites and optimizing the carbon skeleton structure to modulate catalyst activity. In this study, we introduce a novel hierarchical porous carbon-supported FeCoNi bifunctional catalyst, synthesized via a spray combustion method. The carbon, derived from sucrose, was tailored into a hierarchical porous morphology through etching with NO3– ions and NaCl, thereby significantly increasing the surface area for the interaction of the O2 and electrolyte interaction. The in situ formation of FeCoNi alloy nanoparticles ensures their uniform dispersion and anchoring, facilitating electron transport. The strong interaction and charge transfer at the heterogeneous FeCoNi alloy interfaces, along with nitrogen doping, which enhances the OER/ORR activity, endow the FeCoNi/N-PC catalyst with exceptional bifunctional catalytic properties, characterized by an activity parameter of 0.73 V. Furthermore, the RZAB assembled with this catalyst demonstrates outstanding cycling stability and reversibility, with a minimal round-trip efficiency decay of 7.6% over 1380 cycles (460 h) at 10 mA cm–2.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Diantao Li,Tianjiang Sun,Tao Ma,Weijia Zhang,Qiong Sun,Min Cheng,Zhengtai Zha,Weiwei Xie,Zhanliang Tao
The plating/stripping efficiency of zinc (Zn) is directly related to the efficiency of zinc utilization and cycle stability of the battery, which is affected by factors such as the solvated water-related hydrogen evolution reaction (HER), Zn corrosion, and dendrite formation. Therefore, creating a weak solvate shell for Zn 2+ with reduced solvated water molecules can promote stable deposition and stripping of the zinc anode. In this work, a novel approach using the concentrated charge effect of anions is proposed to remove the solvated water and improve the efficiency of Zn plating/stripping. 3 mol kg −1 (3 m ) ZnCl 2 , Zn(ClO 4 ) 2 , and Zn(BF 4 ) 2 electrolytes are used as the representatives to investigate how anions regulate the solvent shell of zinc ion to achieve high Zn plating/stripping Coulombic efficiency (CE). Computational results show that Cl − has a more concentrated charge compared to ClO 4 − and BF 4 − , indicating a stronger interaction with Zn 2+ . This concentrated charge effect reduces the number of water molecules in Zn 2+ solvation structures. Benefiting from weak solvent structure, the average coulomb efficiency, and cycling stability of the Zn─Cu asymmetric cell using ZnCl 2 electrolyte is better. Additionally, the Zn-NaV 3 O 8 full cell of the ZnCl 2 electrolyte exhibits good electrochemical performance.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yuwei Wang,Xiaoyan Yuan,Zhuoying Ping,Dan Wei
One-dimensional materials are broadly applied in electromagnetic wave (EMW) absorption due to their fast electron transport paths. Herein, SiC/C nanofibers (SiC/C NFs) with rough surface and fluffy structure were prepared by electrospinning, using zinc acetylacetone as a structural modifier. The morphology and microstructure of the as-prepared fibers were changed by Zn sublimation during heat treatment process, leading to significantly improve their dielectric parameters and EMW absorption performance. The minimum reflection loss (RL, dB) of the SiC/C NFs/paraffin with a filling ratio of 15 wt% was −46.77 dB, and effective absorption bandwidth (EAB, RL < −10 dB) reached 5.84 GHz at 1.96 mm. The delightful performance was mainly attributed to the fluffy microstructure caused by the Zn sublimation, the fast electron transport paths established by the fibers, and the enhanced polarization loss brought by effective heterogeneous interfaces. Therefore, a referable strategy was put forward structural engineering for the absorber of SiC/C NFs.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2024
·
IF 2.3
Ge Linheng,Zhang Hong,Wang Zirui,Gao Qingli,Ren Manman,Cai Xiaoxia,Liu Qinze,Liu Weiliang,Yao Jinshui
Due to its abundant zinc resources, high safety and low cost, aqueous zinc-ion batteries (AZIBs) are considered one of the most interesting lithium-ion battery replacement technologies. Herein, a novel Zn-doped cathode material is achieved via pre-intercalation of Zn 2+ into the prepared manganese tetroxide (Mn 3 O 4 )/graphene oxide (GO). The pre-intercalation of Zn 2+ effectively increases the lattice spacing of Mn 3 O 4 and reduces the barrier of insertion/extraction of Zn 2+ , thus improving the kinetic properties of the material. Meanwhile, the conductive carbon skeleton GO successfully combines with polyethyleneimine and Mn 3 O 4 , which can expand electron and ion conductivity and avoid chemical bulk change. This unique structure enables the Zn-doped cathode a reversible specific capacity with excellent performance (170 mAh g −1 at 200 mA g −1 ). Furthermore, the diffusion coefficient of the Zn-doped cathode is 10 −9 –10 −10 cm −2 s −1 . Therefore, this study introduces a viable approach for the practical implementation of advanced electrode materials in AZIBs applications. Graphical Abstract
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Ziwei Gan,Lei Hu,Mengxuan Sun,Nengze Wang,Xiaohe Ren,Chunyang Jia,Zhijie Li,Xiaojun Yao
Aqueous zinc-ion capacitors (ZICs) have been regarded as an emerging energy storage device due to their excellent safety, low cost, environmental friendliness, and high energy density. However, poor cycling stability due to fatal defects of the zinc anode such as dendrite growth, corrosion, and passivation limits the better development of ZICs. Here, we propose a dual strategy of 3D host design and surface chemical modification. Zn foam is chosen as the anode skeleton to expand the 2D zinc metal into a 3D porous structure, providing abundant active sites and enhancing the electrical conductivity. Meanwhile, the flamed reduced graphene oxide (FRGO) coating is used as a protective and modulating layer for the 3D skeleton to enhance zinc deposition and effectively inhibit interfacial side reactions. As a verification, the prepared FRGO coated Zn foam (FRGO@Zn foam) in a symmetrical cell shows a stable cycle life of 1600 h at 1 mA cm–2 and 1 mAh cm–2. Furthermore, when FRGO@Zn foam was used as the anode and dense rGO/FRGO graphene film used as the cathode, the energy density of the ZICs is as high as 118.4 Wh L–1 (124.6 Wh kg–1), and the capacitance retention rate is still 93.6% after 30,000 cycles, indicating that the anode has good application prospects in the ZIC field.
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