CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Mengze Gong,Lingyu Jia,Shanshan Dang,Tianliang Lu,Peng Wang,Weifeng Tu,Zhenzhou Zhang
The catalytic conversion of biomass-derived 5-hydroxymethylfurfural (HMF) into high-value-added products, such as 2,5-bis(hydroxymethyl)furan (BHMF) and 2,5-bis(hydroxymethyl)tetrahydrofuran (BHMTHF) has attracted considerable attention. Among this process, controlling the distribution of the catalytic products plays a vital role. In this paper, NiCe and NiZnCe catalysts were prepared by the sol-gel method. By optimizing the metal loading amount and reaction conditions, a selectivity of 95.3 % to BHMTHF with the NiCe catalyst and a selectivity of 94.1 % to BHMF with the NiZn 0.1 Ce catalyst were achieved. Characterization results demonstrated that the addition of Zn causes electrons to transfer from Zn to Ni and increases the content of oxygen vacancies on the catalyst surface, inhibiting the adsorption of furan ring on the NiZn 0.1 Ce surface, thus precisely controlling hydrogenation sites at the C O rather than the C C of the furan ring. This study provides guides for precise regulation of product selectivity when designing catalysts, and it is expected to be applied to the catalytic conversion of biomass-derived platform molecules.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Siyuan Wang,Jie Li,Yang Xiao,Xinyi Zhu,Jingyu Yuan,Yan Yang,Jinliang Zou,Yichao Yan
This study presents a systematic investigation of the crystalline phases, grain characteristics, dynamic hysteresis loops, and magnetodielectric attributes of Mg 0.9 Zn 0.1 Fe 2- x Co x O 4 ferrites ( x = 0.00–0.10, with a increments of 0.02). The samples were fabricated by a solid-state synthesis route, and formed by sintering at 950 °C for 3 h. XRD analysis shows that all samples possess the standard ferrite phase. Due to the influence of sintering additive Bi 2 O 3 , the trace amounts of Bi 24 Fe 2 O 39 phase are present in the samples, which exert a positive influence on the material’s dielectric performance. Analysis of the grain characteristics indicates that the mean crystallite dimension of the samples gradually increases as Co 2 + ion substitution level rises, and the particle size distribution becomes more uniform. Upon applied magnetic field stimulation, all samples present outstanding soft magnetic properties. When the Co 2+ content is 0.06, the saturation magnetization of the material attains a peak value of 48.8 emu/g. Dynamic magnetic measurements reveal that the permeability decreases significantly (from 20 to 7.5) with the incorporation of Co 2+ ions, while the cutoff frequency correspondingly increases from 0.2 GHz to 1 GHz. At x = 0.08, the sample exhibits excellent magneto-dielectric matching characteristics across the 10–300 MHz frequency band. The normalized impedance value is approximately 1, and the permeability and permittivity are nearly equal in magnitude ( μ' = 10, ε' = 10.1 at 100 MHz). Additionally, the magnetic and dielectric losses are remarkably low at 100 MHz, with tanδ μ = 0.054 and tanδ ε = 0.0048. Consequently, the magneto-dielectric material prepared in this work is a potential option for miniaturized VHF antenna substrate material.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chuanxi Zhao,Zhi Zhu,Kai Chang,Shijie Wang,Jiasheng Huang,Qin Wang,Lan Xia,Chunfei Zhang,He Miao
As one of the most successful aqueous zinc-based batteries, the alkaline Zn-MnO 2 batteries (AZMBs) suffer from the low utilization of MnO 2 . This work proposes a simple approach to address this issue by optimizing the graphite contents and microstructures in the cathode. It is found that the cathode of AZMB containing 9 wt% graphite exhibits the best electrochemical performances, achieving the discharge capacities of 240.6 mAh and 196.25 mAh at 10 and 25 mA, increasing by 7.7 % and 9.0 % compared to that of the commercial AZMBs, respectively. Additionally, by adopting the fully-expanded graphite with large specific surface area and thin thickness, the discharge capacities of AZMB increase by 8.7 % and 8.8 % at 10 and 25 mA, compared to that of the commercial AZMBs, respectively. The improving discharge properties of AZMBs with proper graphite content and microstructure can be ascribed to the high conversion rate of MnO 2 into the discharge product of MnOOH due to the improved conductive network. This work provides a valuable insight for the development of the aqueous Zn-based batteries.
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Advanced Science
·
2025
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IF 14.1
Sibo Wang,Chen Li,Wanlong Wu,Guoli Zhang,Razium Ali Soomro,Wenchao Fu,Xiaoqi Sun,Bin Xu
Aqueous Zn–S batteries are promising candidates for large-scale energy storage applications due to their high specific capacity and energy density. However, their performance is extremely plagued by the sluggish redox kinetics. Here, an interface chemistry regulator is proposed for both electrodes to facilitate reaction kinetics and promote stability. The tetramethylurea (TTMU) is selected as the electrolyte additive. It first preferentially adsorbs on the sulfur cathode surface and coordinates to Zn 2+ , thereby altering their reaction pathway. This reduces the energy barrier and promotes uniform ZnS nucleation, which accelerates reaction kinetics. At the same time, the additive induces an effective solid-electrolyte interphase on the anode and enhances the reversibility and stability of Zn plating/stripping. With the help of 10% TTMU additive, the Zn–S battery delivers a high capacity of 1620 mAh g −1 with a low overpotential of 0.37 V at 0.1 A g −1 , which is superior to 1138 mAh g −1 /0.65 V in the benchmark Zn(OAc) 2 /ZnI 2 electrolyte. With the increase of current density to 5 A g −1 , the additive also significantly enhances the capacity from 48 to 913 mAh g −1 . Promoted cycling stabilities are further achieved for both Zn electrode and Zn–S cells in the TTMU containing electrolyte.
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DYES AND PIGMENTS
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2025
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IF 4.2
Yuqing Yang,Shicong Pei,Mingdi Yang,Kehua Zhang,Jie Jin,Yunsheng Ding,Xianhai Hu
Full-color fluorescent tunable materials have attracted much attention due to their broad application prospects in fields such as lighting, display devices, and biological imaging. However, it remains challenging to prepare environmentally friendly full-color fluorescent tunable materials through simple and efficient methods. Herein, a series of amino-functionalized complexes were synthesized, and, via covalent bonding, a color-tunable waterborne polyurethane system (WPU-Eu 1-x-y Tb x Zn y ) was developed, exhibiting both full-color and white fluorescence. In addition, due to the inherent differences in the ultraviolet absorption properties of each complex, the emission color can be further adjusted by changing the excitation wavelength. This dual mechanism enables both preset and dynamic color adjustments, providing various possibilities for applications such as anti-counterfeiting and display technologies. More importantly, WPU-Eu 1-x-y Tb x Zn y uses water as a dispersant, has a low VOC content, and is particularly safe and environmentally friendly.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Kaixuan Kuang,Jiahui Wang,Xiuzhen Zheng,Jingbiao Ge,Huihui Xue,Sujuan Zhang,Sugang Meng,Shifu Chen
To improve the efficiency of photocatalytic H 2 production, many researches are widely studied on the microstructure regulation of cocatalysts, including morphology design, atomic doping, and heterostructures composite. Derived from Ni-Co MOF materials, hollow NiCoP (NCP) microspheres as electron acceptor can effectively promote the separation of photogenerated charge carriers (PCCs). With Zn 0.3 Cd 0.7 S (ZCS) nanoparticles supporting on the surface of NCP, a series of NiCoP/Zn 0.3 Cd 0.7 S (NCP/ZCS) composites were successfully prepared by electrostatic self-assembly and characterized by many tests. Under visible light illumination, 10 % NCP/ZCS catalyst had the best H 2 production rate (21.50 mmol g −1 h −1 ) with benzyl alcohol (PhCH 2 OH) as the sacrificial agent, about 45.74 times that of pure ZCS. Its apparent quantum yield (AQY) reached highest at 400 nm, which was about 18.94 %. Through a combination of photoelectric, PL and UPS experiments, a Z-scheme transfer model was proposed in the NCP/ZCS composite for highly efficient photocatalytic H 2 generation. For ZCS, the hollow structure of the NCP cocatalyst can improve the light utilization rate, increase the reaction active site and accelerate the electron transmission rate. This structural design of cocatalyst not only provides a new idea to understand the reaction process of photocatalysis, but also opens up new directions for the development of simple, efficient and low-cost cocatalysts.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
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IF 15.7
Ling Wei,Mo Funian,Wu Xiongwei,Zeng Xianxiang,Xiong Jian,Huang Yan
Solid-state electrolytes have the great potential to achieve high-voltage and durable zinc-based batteries, but their effectiveness is limited by inferior ionic conductivity and large interfacial voltage polarization. Here, a nonflammable solid-state eutectic electrolyte is prepared in situ by cross-linking polymerization of ternary eutectic electrolyte with ethoxylated trimethylpropane triacrylate. Thanks to the intermolecular interaction among the deep eutectic solvents and polymer skeleton, the solid-state eutectic electrolyte possesses satisfactory room-temperature ionic conductivity of 3.94 × 10 -3 S cm -1 . It enables the symmetric batteries with 80% Zn utilization operating stably at high current density of 8.0 mA cm -2 for 1700 h, exceeding all non-aqueous and most aqueous zinc batteries. More importantly, due to solvation structure regulation, the solid-state eutectic electrolyte is found to elevate discharge voltage plateau to 2.1 V in Zn full batteries, and presents favorable rate performance and cyclic stability at 25 \(\pm\) 1 °C.
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ELECTROCHIMICA ACTA
·
2022
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IF 7.336
Pengfei Sun,Wenxiu Liu,Daiwen Yang,Yan Zhang,Weiming Xiong,Sha Li,Jiajia Chen,Jinghua Tian,Li Zhang
In aqueous electrolyte, the hydration of solvated zinc ions and the unstable deposition interface exacerbate the accumulation of Zn dendrites and the generation of by-products, making it difficult to achieve highly reversible and long-life Zn-ion batteries (ZIBs). Herein, a high-modulus agarose gel electrolyte (AGE) with greatly suppressed H 2 O molecule mobility, is designed to overcome the above challenges. The ample hydroxyl (-OH) functional groups on the double helix chain of the AGE can capture and anchor H 2 O molecules via hydrogen bonding, thus fundamentally regulating the coordination environment of Zn 2+ and enhancing the stability of deposition interface. Moreover, the -OH functional groups can also effectively immobilize sulfate ions and largely confine their free diffusion, thereby greatly inhibiting the formation of zinc hydroxysulfate by-product. As such, the dendrite issue and side reactions can be significantly mitigated using our designed AGEs, holding great promise for ZIBs with extended cycling durability and high safety.
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Small
·
2025
·
IF 12.1
Mingmin Liao,Hao Wu,Huanhuan Fan,Binchun Liu,Peng Xiao,Qi Yang,Guangming Cai
The uncontrolled Zn 2+ deposition on the surface of Zn metal anode remains a critical challenge in the development of zinc-ion batteries (ZIBs). Here, a novel separator featuring negatively charged sulfonic acid groups (─SO 3 H) and strong hydrophilicity is reported to promote ion conduction and solvation stability. Through systematic experimental investigations and density functional theory, it is demonstrated that the water-retaining effect of the ─SO 3 H group effectively suppresses side reactions and reduces the desolvation energy barrier, thereby establishing a hydrogen-bond-mediated ion transport channel. As a result, the Zn/Zn symmetric cells with sulfonated polyethersulfone (SPES) nanofiber separator demonstrate a long-term stability over 4400 h under stepwise current densities of 0.5/2.5/4 mA cm −2 . Meanwhile, the Zn/V 2 O 5 cells exhibit excellent long-cycle life, maintaining 96.2% capacity retention after 2250 cycles at 1 A g −1 . This work offers a new way to further reduce the cost and promote the industrial application of ZIBs.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Ting Yu,Jiahao Wan,Jingye Yang,Xiaokang Luo,Man Xie,Lehui Liu,Hongming Liu
The discovery of novel organic–inorganic hybrid nonlinear optical (NLO) crystal materials holds great potential in advancing laser science and technology as they offer a wide range of benefits including easy synthesis, structural versatility, and high hyperpolarizability. Herein, the integration of l-tartaric acid (L-C4H6O6) and ZnSO4 gave rise to two acentric Zn-based organic–inorganic hybrid crystals, namely, Zn2(H2O)2(C4H4O6)2·3H2O (Zn-LT) and Zn2(H2O)(C4H4O6)(C4H6O6)(SO4)·4H2O (Zn-LTS). They both feature layered structures constructed by [ZnO6] octahedron, l-C4H6O6/l-C4H4O62–, water molecule, or [SO4] tetrahedron. Interestingly, they possess moderate second-order NLO effects of 0.28 × KH2PO4 (Zn-LT) and 0.57 × KH2PO4 (Zn-LTS), large birefringence of 0.075 (Zn-LT) and 0.069 (Zn-LTS), suggesting that the introduction of [SO4] groups with intrinsically weak polarizability and weak optical anisotropy induces the enhancement of the NLO effect while without reducing birefringence much. In addition, both of them display UV cutoff edges near 210 nm, indicating their potential as NLO crystals applied in the UV and solar-blind region.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zihan Qi,Murong Xi,Zhenjie Liu,Rui Sheng,Wei Wang,Tianlong Wu,Yudai Huang
The Zn/electrolyte interface stability is related to HER, passivation, dendrites, corrosion and Zn 2+ deposition orientation. Reducing the occupation of H 2 O dipoles in the inner layer of electrical double layer (EDL) is conducive to the inhibition of interfacial side reactions and directing the deposition of Zn 2+ along the (002) crystalline surface, which are beneficial to the reduction of dendrites and the improvement of plating/stripping reversibility. A mechanism is elucidated by which Acetyl-L-carnitine Hydrochloride (A-L-CN) reconfigures the EDL structure and guides the selective deposition of Zn 2+ in this paper. Theoretical calculations show that A-L-CN can cover the high-energy active sites on the Zn (101) crystal plane and control the specific crystal orientation of the deposits along the (002) crystal plane to produce faceted epitaxial growth. The electrochemical test results show that the Zn anode has excellent plating/stripping reversibility as well as good cumulative capacity (10 mA cm −2 , 1 mA h cm −2 , ACE of 99.80 %, CPC of 7,753 mA h cm −2 ). The assembled Zn 2+ hybrid supercapacitor (ZHS) and Zn//PANI full cell show excellent performance (ZHS up to 60,000 cycles; the capacity retention ratio of Zn//PANI full cell is 76.7 % after 1,000 cycles). The work offers the possibility of achieving stabilized Zn/electrolyte interface performance.
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PROGRESS IN REACTION KINETICS AND MECHANISM
·
2017
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IF 0.682
Hua Song,Shengnan Li,Hualin Song,Feng Li,Huapeng Cui
A number of Zn–S2O82–/ZrO2–Al2O3 (Zn(x)–SZA) catalysts with different Zn mass fractions were synthesised and characterised by using X-ray diffraction, the Brunauer–Emmett–Teller method, and H2 temperature-programmed reduction. The structure and isomerisation performance of Zn(x)–SZA catalysts were studied using n-pentane as a probe reaction. The results showed that a pure tetragonal ZrO2 phase was formed on Zn(x)–SZA, and the ZrO2 crystallite sizes of the tetragonal phase increased in the order: Zn(0.5)–SZA < Zn(1.0)–SZA < Zn(1.5)–SZA < Zn(2.0)–SZA < SZA. Zn can strengthen the interaction between persulfate ions and the support, promote the formation of stronger acidity, lead to a better dispersion of sulfate ions on the surface, and improve the redox performance of the catalysts. The Zn(1.0)–SZA catalyst exhibited the best catalytic activity for n-pentane isomerisation. At a temperature of 170 °C, a reaction pressure of 2.0 MPa, a molar H2/n-pentane ratio of 4:1, and a weight hourly space velocity of 1.0 h−1, the isopentane yield reached 58.0%.
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