JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 6
·1-11
·
IF 2.8
Zhang Zhengyu,Yang Yujie,Chen Congliang,Chen Dongyang,Zhang Yingming,Meng Yuting,Li Hao
In this study, Ni–Zn–Co ferrite doped with (Al 3+ ) was synthesized by solid-phase synthesis method and its structure was analyzed. By analyzing the X-ray diffraction (XRD) data, it was explained that the Ni 0.45 Zn 0.40 Co 0.15 Fe 2-x Al x O 4 (0 ≤ x ≤ 0.15) ferrite has a single-spinel structure with FD-3 m space group. Additionally, by analyzing the XRD data, it is found that the lattice constant is the largest when Al 3+ is undoped. The range of lattice constant is (8.3751 ~ 8.3900) Å, the range of saturation magnetization ( M s ) is (68.77 ~ 79.39) emu/g, and the range of coercivity ( H c ) is (9.04 ~ 13.10) Oe. When the content of Al 3+ is 0.09, the permeability reaches the highest. In conclusion, the results obtained indicate that this ferrite is suitable for low-frequency electronic devices and also confirm that Fe 3+ was successfully replaced with Al 3+ . This paper provides a new idea for the study of spinel-structured ferrites by doping Al 3+ .
研究领域:
材料科学
·
固体物理
·
磁学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xinhui Sun,Yanjie Chen,Mengmeng Ji,Weiya Zhang,Zhizhong Sun,Wenyi Chu,Xin Wang
Developing efficient bimetallic Ni/Zn metal organic frameworks (MOFs) derived Ni 3 ZnC 0.7 alloy catalyst for cyclization reactions is highly anticipated. Bimetallic Ni/Zn- PTA MOFs with flower-like microspheres morphology was synthesized by using a facile hydrothermal method and used as a precursor for preparation of the catalyst. Then, a ZnO supported Ni-Ni 3 ZnC 0.7 incorporated carbon catalyst (Ni-Ni 3 ZnC 0.7 /ZnO-C) was obtained by deriving from the Ni/Zn- PTA MOFs through one-step pyrolysis. The developed Ni-Ni 3 ZnC 0.7 /ZnO-C catalyst was used as a recoverable heterogeneous catalyst for synthesis of 2-arylbenzimidazoles by cyclization reaction of phenylmethanamines and 2-nitroanilines in good yields. Various characterizations (e.g. SEM/EDX, XRD, TEM, FT-IR, XPS and Raman) revealed that the catalyst exhibited good performance for cyclization reaction, which are ascribed to particular hierarchical structure, as well as synergistic effect between Ni and Ni 3 ZnC 0.7 . As a result, the Ni-Ni 3 ZnC 0.7 /ZnO-C catalyst showed excellent stability and activity for the condensation cyclization reaction. This bimetallic MOFs-derived Ni-Ni 3 ZnC 0.7 catalyst opens up a potential way for fabricating other Carbon supported alloy catalysts in heterogeneous catalysis reactions.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Zicheng Yang,Jiale Ni,Chengyuan Duan,Yi Feng,Jianfeng Yao
Introducing dual Lewis acidic and basic sites into carbon is a promising way to improve the catalytic efficiency of carbon-based catalysts for CO2 fixation into epoxides to produce cyclic carbonates. Here, a simple and one-step method is proposed to couple atomically dispersed Zn–N4 sites and abundant –OH/–COOH groups as hydrogen bond donor (HBD) sites in porous nitrogen-doped carbon via pyrolysis of a mixture of tea saponin, melamine and Zn(NO3)2. These HBD sites, together with atomically dispersed Zn sites, serve as Lewis acids to activate epoxides, while N-doping provides a Lewis base, favouring CO2 activation. As a result, the resulting carbon (ZNC-800) displayed high yields of >99% at 12 h for CO2 cycloaddition with different epoxides, such as epichlorohydrin, epibromohydrin, benzyl(R)-(−)-glycidyl ether, 1,2-epoxyhexane and glycidyl phenyl ether, at 80 °C and 0.1 MPa CO2. In addition, owing to its good photothermal ability, ZNC-800 can also drive CO2 cycloaddition reactions with high catalytic efficiency under light irradiation, which makes ZNC-800 a promising biomass-derived catalyst for both thermally and photothermally driven CO2 conversion.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·Vol. 44
·期 31
·16348-16358
·
IF 4.084
Dandan Sun,Dechao Chi,Zekang Yang,Zipeng Xing,Junwei Yin,Zhenzi Li,Qi Zhu,Wei Zhou
Mesoporous g-C 3 N 4 /Zn–Ti layered double hydroxide (LDH)-laminated van der Waals heterojunction nanosheets were prepared by a facile one-step in situ hydrothermal method . Due to the strong electrostatic interactions between the positively charged Zn–Ti LDH and negatively charged g-C 3 N 4 nanocrystal , a laminated van der Waals heterostructure was successfully formed between Zn–Ti LDH and g-C 3 N 4 . The mesoporous g-C 3 N 4 /Zn–Ti LDH-laminated van der Waals heterojunction, which had a narrow bandgap of 2.41 eV extended the photoresponse to the visible light region. The obtained heterojunctions showed excellent visible-light-driven photocatalytic performance for the complete removal of ceftriaxone sodium (up to ∼97%) and a high hydrogen production rate (∼161.87 μmol h −1 g −1 ). This was mainly attributed to the formation of the laminated van der Waals heterojunctions, which favoured charge separation and the absorption of visible light, and the mesoporous structure, which provided more surface active sites. This facile strategy for preparing mesoporous g-C 3 N 4 /Zn–Ti LDH-laminated van der Waals heterojunctions offers new insights for the fabrication of high-performance van der Waals heterojunction photocatalytic materials.
研究领域:
材料科学
·
光催化
·
纳米材料
·
环境化学
·
能源化学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 14
·2311637
·
IF 27.4
Ziyi Yang,Fayuan Lai,Qianjiang Mao,Chong Liu,Ruoyu Wang,Zhihua Lu,Tianran Zhang,Xiangfeng Liu
Dendrite-free Zn metal anodes with high depth-of-discharge (DoD) and robust cycle performances are highly desired for the practical application of aqueous Zn-ion batteries. Herein, the zincophobic/hydrophilic nature of Metal-N-C through manipulating the electronic interactions between metal and coordination atoms is successfully reversed, thereby fabricating a zincophilic/hydrophobic asymmetric Zn-N 3Py+1Pr -C (consisting of a Zn center coordinated with 3 pyridinic N atoms and 1 pyrrolic N atom) host, which realizes uniformed Zn deposition and a long lifespan with high DoD. The experimental and theoretical investigations demonstrate weakened interaction between pyrrolic N and metal center in the asymmetric Zn-N 3Py+1Pr -C triggers downshift of the Zn 3d-band-center and a new localization nonbonding state in the N and C 2p-band, resulting in preferred Zn adsorption to water adsorption. Consequently, the asymmetric Zn-N 3Py+1Pr -C host delivers small Zn nucleation overpotential and high Coulombic efficiency of 98.3% over 500 cycles. The symmetric cells with Zn-N 3Py+1Pr -C@Zn anode demonstrate 500 h dendrite-free cycles at DoD up to 50%. The Zn-N 3Py+1Pr -C@Zn/S-PANI full cell also shows a robust long-term cycle performance of 1000 cycles at 10 A g −1 . This strategy of constructing zincophilic/hydrophobic Metal-N-C may open up their application for the dendrite-free metal anode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Zhengfeng Wang,Xiaoyun Miao,Xingzhi Zhu,Shihang Guo,Donglin Han,Xiaofeng Ye,Zhaoyin Wen
The Ln 2 NiO 4+δ compound (Ln = La, Pr, Nd) finds extensive use as a cobalt-free oxygen electrode material in protonic ceramic electrolysis cells (PCECs) owing to its unique RP-type structure and remarkable catalytic activity . In this study, Cu and Zn co-substitution is employed to fabricate a series of materials, within the La 1 · 2 Sr 0 · 8 Ni 0.5 Cu x Zn 0.5-x O 4+δ system (x = 0.1, 0.2, 0.3, 0.4, denote as LSNCZ14, LSNCZ23, LSNCZ32, and LSNCZ41), and the crystal structure, conductivity, proton absorption and electrochemical properties are comprehensively investigated. The LSNCZ41 exhibits the lowest polarization resistance of 0.83 Ω cm 2 at 600 °C in the symmetric cell. The PCEC single cell incorporating the LSNCZ41 air electrode demonstrates a high electrolysis current density of 1.5 A cm −2 (1.3 V) at 600 °C under 60 % humidity in air, furthermore, negligible degradation is observed under this high current density during electrolysis for over 250 h. These results indicate that LSNCZ41 possesses a higher concentration of interstitial oxygen ions and superior proton absorption capacity , significantly expediting the oxygen reduction reaction (ORR) and ionic transport processes. This material can be considered as a promising candidate for the PCEC air electrodes due to its superior stability in air with high steam content.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2018
·
IF 0
Fuhai Li,Dairong Hu,Yahui Yuan,Binbin Luo,Yibing Song,Songtao Xiao,Guanghui Chen,Yiwen Fang,Fushen Lu
To mimic biological enzyme in catalysis, metal-imidazole-salen complexes were proposed (via DFT calculation) and synthesized in situ within the cavities of Y zeolite. Among the synthesized zeozymes, the Cu-salenIIY exhibited a prominent catalytic efficiency for the selective oxidation of benzyl alcohol. Specifically, the activity and selectivity of the encapsulated catalyst were comparable to those of the free Cu-salenII complex in solution. Furthermore, the high activity and selectivity were preserved during the repeated cycles. The similarity in the initial activity implies that the Cu-salenII complex just resides in the cavity of the zeolite Y, and its intrinsic properties responsible for the catalytic activity keep intact after encapsulation. The confinement of zeolite nanocavities effectively inhibited the dimerization or aggregation of the Cu-salenII complex and prevented the active species from escaping into reaction solution, thus resulting in a remarkably improved in the catalytic reusability and durability.
研究领域:
催化
·
材料科学
·
化学工程
·
无机化学
✓ 已验证
产品关联
DOI
RSC Advances
·
2016
·Vol. 6
·期 51
·45475-45481
·
IF 3.289
Yi Yang,Kang Shen,Jun-zhong Lin,Yong Zhou,Qiao-yun Liu,Cheng Hang,Hani Nasser Abdelhamid,Zhen-qin Zhang,Hong Chen
A novel zinc-based luminescent metal–organic framework (Zn-MOF) has been successfully constructed based on a designed flexible and electron-rich N-involved linker (HL = 4-(bis(4-(pyridin-4-yl)phenyl)amino)benzoic acid). The framework of this Zn-MOF exhibits a 2-fold interpenetrated network which is composed of (3,3)-c sheets. The Zn-MOF has a strong solid state emission at 512 nm. The luminescence signal of the Zn-MOF can be quenched efficiently by trace amounts of electron-deficient nitroaromatics, especially 2,4,6-trinitrophenol (TNP). The quenching constant (Ksv) for TNP is 2.11 × 104 M−1, indicating that this framework can be employed as an excellent chemical sensor for identifying and quantifying TNP. This work highlights a strategy for designing a N-involved π-electron-rich enhanced ligand with nucleophilic properties for MOF-based materials as sensors. It also paves the way toward exploring other more efficient MOF materials as sensors for determining electron-deficient nitroaromatics.
研究领域:
材料科学
·
化学传感
·
分子设计
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
·
IF 14.7
Zhang Minghao,Sun Chenxi,Chen Guanhong,Kang Yuanhong,Lv Zeheng,Yang Jin,Li Siyang,Lin Pengxiang,Tang Rong,Wen Zhipeng,Li Cheng Chao,Zhao Jinbao,Yang Yang
Rechargeable aqueous zinc-metal batteries, considered as the possible post-lithium-ion battery technology for large-scale energy storage, face severe challenges such as dendrite growth and hydrogen evolution side reaction (HER) on Zn negative electrode. Herein, a three-dimensional Cu-In alloy interface is developed through a facile potential co-replacement route to realize uniform Zn nucleation and HER anticatalytic effect simultaneously. Both theoretical calculations and experimental results demonstrate that this bifunctional Cu-In alloy interface inherits the merits of low Zn-nucleation overpotential and high HER overpotential from individual copper and indium constituents, respectively. Moreover, the dynamical self-reconstruction during cycling leads to an HER-anticatalytic and zincophilic gradient hierarchical structure, enabling highly reversible Zn chemistry with dendrite-free Zn (002) deposition and inhibited HER. Moreover, the improved interface stability featured by negligible pH fluctuations in the diffusion layer and suppressed by-product formation is evidenced by in-situ scanning probe technology, Raman spectroscopy, and electrochemical gas chromatography. Consequently, the lifespan of the CuIn@Zn symmetric cell is extended to more than one year with a voltage hysteresis of 6 mV. Importantly, the CuIn@Zn negative electrode is also successfully coupled with high-loading iodine positive electrode to fabricate Ah-level (1.1 Ah) laminated pouch cell, which exhibits a capacity retention of 67.9% after 1700 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2025
·
IF 2
Sun Lili,Sun Xudong,Wang Yong,Li Yongcun,Luo Anyu
Zinc anodes degrade rapidly under high-temperature operating conditions, significantly impeding the development and commercial application of Zn–air batteries. In this study, zirconia-coated zinc (ZrO 2 @Zn) was synthesized using a facile sol–gel method. The composition, structure, and electrochemical properties of the ZrO 2 @Zn anode were characterized. The results show that ZrO 2 @Zn has a core–shell structure contributing to regulating the cycle life of the battery. The passivation current of ZrO 2 @Zn is lower than that of Zn. This indicates that ZrO 2 @Zn exhibits enhanced passivation stability performance. The cycle life of ZrO 2 @Zn can be extended to 72 h at extreme operating temperatures of 60 °C, nearly double that of bare Zn. The coating ZrO 2 applied on the surface of Zn can effectively avoid the direct contact between Zn and electrolyte and reduces the self-corrosion of Zn anode. The increased adsorption of H + ions by ZrO 2 at elevated temperatures without affecting the deposition of Zn 2+ prolongs the lifetime of the ZrO 2 @Zn anode. The core–shell structure of ZrO 2 @Zn effectively mitigates the occurrence of anodic side reactions and inhibits the growth of Zn dendrites, thereby safeguarding the active material and extending the battery’s cycle life.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Chunhua Li,Zhehang Tian,Guanqun Luan,Luqian Bao,Mengyao Cui,Yixin Ji,Xieyang Zhang
The extensive use of tetracyclines in livestock poses health risks due to their residues in animal-derived food; therefore, developing simple detection methods to replace complex traditional approaches is of paramount importance. Here, we developed a dual-ligand zinc-based metal–organic framework material, Zn-BTC-BDC-NH2 (denoted as ZTD), for the detection of tetracyclines. The intrinsic blue fluorescence of ZTD was quenched upon the introduction of tetracyclines due to electron transfer from −NH2 of ZTD to −CO– and −OH groups of tetracycline molecules; meanwhile, the new green fluorescence emission was generated through π–π stacking between aromatic rings and the formation of complexes between Zn2+ and C–O/C═O groups. In real food samples, ZTD exhibited recovery rates ranging from 93.62 to 110.66%, with detection limits as low as 0.011 μmol·L–1. Additionally, a ZTD fluorescence test paper was developed for portable detection. This study presents a novel tetracycline detection method, offering insights into multiligand metal–organic framework preparation and future sensing method design.
研究领域:
材料科学
·
食品安全
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Li Luo,Zhen Fan,Zhaobin Zhang,Danyang Liu,Guofa Li,Lishuang Wang,Bingsuo Zou
SnO2 nanoparticles (NPs) have been used as an electron transport layer (ETL) in quantum dot light-emitting diodes (QLEDs) to achieve stable and high-performance devices. However, SnO2 NPs with high electron mobility cause the problem of imbalanced charge injection and transport in QLEDs. Meanwhile, the SnO2 NPs synthesized at low temperature have hydroxyl (−OH) groups, which could damage the performance of QLEDs. Here, Zn doping was applied to modulate the properties of SnO2 NPs and achieve better carrier balance in green CdSe/ZnS QLED. The maximum current efficiency (CE) of QLED with 5 wt % Zn-doped SnO2 NPs is 2.3-fold higher than that of SnO2-based QLED. In addition, a small-molecule 4,4′-bis(carbazole-9-yl)-1,1′-biphenyl (CBP)-mixed poly(9-vinylcarbazole) (PVK) layer was used as a hole transport layer to facilitate the hole injection and charge balance. As a result, a maximum external quantum efficiency (EQE) of 5.03% is obtained for the best performance device. The T50 lifetime at a luminance of 100 cd/m2, for a device based on 5 wt % Zn-doped SnO2 ETL, is 9141 h, which is 2.29-fold longer than the reference one. This work provides a new strategy to obtain high-performance and stable display arrays.
研究领域:
材料科学
·
光电子学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）