Nanoscale
·
2019
·Vol. 11
·期 21
·10257-10265
·
IF 6.97
Chenbao Lu,Jichao Zhang,Zhenying Chen,Kaiyue Jiang,Mingqiang Li,Fan Zhang,Gangsheng Tong,Xiaoxin Zou,Yuezeng Su,Xiaodong Zhuang
The development of nonprecious and efficient catalysts to boost the oxygen reduction reaction (ORR) is imperative. However, the majority of previously reported approaches suffered from a complicated fabrication procedure, both time consuming and difficult to scale up. Herein, large-scale iron ion embedded polyaniline fibers were successfully fabricated as precursors for preparing iron/nitrogen co-doped fibrous porous carbons (Fe/NPCFs) through an interfacial engineering strategy at room temperature. As ORR electrocatalysts in an alkaline medium (0.1 M KOH), Fe/NPCFs display a positive half-wave potential of 0.827 V (vs. RHE), and high limited current density (up to 5.76 mA cm−2), which are better than those of commercial Pt/C (E1/2 = 0.815 V, JL = 5.47 mA cm−2). Also, Fe/NPCFs exhibit a high ORR catalysis activity (E1/2 = 0.632 V, JL = 5.07 mA cm−2) in acidic medium (0.5 M H2SO4). When used as an air cathode in a primary Zn–air battery, high power density (158.5 mW cm−2) and specific capacity (717.8 mA h g−1) can be easily achieved, outperforming the commercial Pt/C.
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高影响因子
JOURNAL OF POWER SOURCES
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2026
·
IF 7.9
Shaolin Yang,Panpan Fu,Zexi Chen,Shihao Chang,Qianqian Song,Jiandong Wu,Tong Xue,Chunping Hou,Zhilin Sheng
The practical application of manganese dioxide (MnO 2 ) in Zn-ion batteries (ZIBs) is hindered by intrinsic limitations such as low electronic conductivity, slow ion diffusion, and structural instability. To address these challenges, we report a Co-doped δ-MnO 2 /MXene composite (CMM) cathode, fabricated via a facile one-step room-temperature synthesis. This design creates a synergistic coupling effect, where MXene provides a conductive scaffold while cobalt doping modulates the electronic structure of MnO 2 . This dual modification collectively enhances electrical conductivity, expands the active surface area, and significantly accelerates ion diffusion kinetics. As a ZIB cathode, the CMM electrode demonstrates exceptional charge storage performance: delivering a high specific capacity of 480.9 mAh g −1 at 0.1 A g −1 , and exhibiting exceptional long-term durability with over 100 % capacity retention after 2000 cycles at 1 A g −1 . Remarkably, it achieves an outstanding energy density of 651.6 Wh kg −1 at a power density of 135.5 W kg −1 , significantly outperforming both δ-MnO 2 /MXene (MM) and pristine δ-MnO 2 cathodes. This work establishes an effective synergistic regulation strategy and provides profound insights into the design of high-performance cathode materials for advanced energy storage systems.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yan Yang,Xiaohui Li,Jie Li,Yu Xiong,Yang Xiao,Wei Zhou,Zongcheng Su,Junhao Xiong,Jinxin Zhou,Huaiwu Zhang
NiCuZn ferrites with high saturation magnetization and low magnetic loss in the microwave band have attracted significant attention for applications in microwave devices, especially in phased-array systems. However, achieving device miniaturization and integration while simultaneously maintaining low loss and excellent gyromagnetic performance remains a major challenge. In this study, the grain size effect on the gyromagnetic properties and magnetic loss suppression in NiCuZn ferrites was investigated by incorporating Bi 2 O 3 and nano-NiZn ferrite additives. The results show that the addition of Bi 2 O 3 effectively lowers reaction activation energy and reduces the sintering temperature, facilitating easy densification of the ferrite material. Benefiting from the synergistic effect of nano-NiZn ferrite addition and Bi 2 O 3 -assisted liquid-phase sintering, dense NiCuZn ferrites with a uniform grain size (G avg. = 7.62) and a high density ( ρ m = 5.32 g/cm 3 ) are obtained, leading to enhanced gyromagnetic properties and reduced magnetic loss. Consequently, the NiCuZn ferrite ceramic with optimized composition exhibits an ultra-low magnetic loss ( ΔH = 126 Oe), low dielectric loss (tanδ ε = 0.033) and an improved saturation magnetization (4π M s = 4159 G). This study provides a simple and effective strategy for achieving dense and compact grain structures, offering guidance for the design of miniaturized and low-loss microwave devices.
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POLYMER DEGRADATION AND STABILITY
·
2026
·
IF 8.1
Yu Sun,Keqing Zhou,Di Li,Yongqian Shi,Bin Yu,Sheng Zhang
The flammability of flexible polyurethane foam (FPUF) and the degradation of mechanical properties caused by traditional flame retardants limit its application in scenarios with high safety requirements. To address this, a P/N/Zn complex-functionalized graphene (PPZ@fGO) nanohybrid was synthesized and incorporated into the FPUF matrix. Structural characterization confirmed its successful synthesis and uniform dispersion. Adding 5% PPZ@fGO increased the mechanical strength to 15.17 kPa, a 400.67% improvement over the control FPUF. This enhancement is attributed to synergistic physical entanglement and chemical crosslinking between PPZ@fGO and the matrix. Concurrently, the composites exhibited significant reductions in peak heat release rate (PHRR, 31.6%), total heat release (THR, 28.7%), and total smoke production (TSP, 30.3%) compared to control FPUF. The fire growth rate index (FIGRA) was lowered by 42.3%, with thermogravimetric analysis revealing a higher char residue (11.9%). This was due to the catalytic carbon formation of metal ions, expansion charring of PPZ, the barrier effect of fGO, and the dilution effect of nonflammable gases. Furthermore, a standard room fire model based on Fire Dynamics Simulator (FDS) was constructed to investigate its practical application in real-world scenarios. Simulation results revealed that the modified foam effectively suppresses rapid fire spread and severe thermal escalation. Specifically, the peak ceiling temperature dropped by 600–700 °C, and the steady-state carbon monoxide (CO) concentration was reduced by nearly 50% within 600 s, substantially prolonging the available safe egress time. This work provides a solution for developing FPUF with outstanding flame retardancy, smoke suppression properties, and mechanical strength.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Xiaoyu Deng,Feng Cao,Yanli Li,Lijun Wang,Xianggui Chen,Jun Li,Zhouyu Wang,Xiaoqi Yu
Organic phosphate esters compounds, especially methyl-paraoxon (MP), pose a serious threat to the environment and human health. The development of robust organophosphorus hydrolases (OPHs)-like nanozymes to mimic natural enzymes is paramount for on-site monitoring MP. Herein, we reported a biomimetic engineering of highly active OPHs-like nanozymes through Zn-doped macrocyclic polyamine carbon dots (DOTA(Zn)-CDs). XPS confirmed Zn N coordination, while FTIR revealed macrocyclic polyamine frameworks with Zn-O/N coordination shifts, together mimicking the histidine‑zinc centers of native OPHs. This design induced a remarkable improvement in OPHs-like activity, demonstrated by a superior catalytic efficiency and a significant enhancement in adsorption affinity for MP hydrolysis, as confirmed by kinetic assays and density functional theory calculations. DOTA(Zn)-CDs nanozymes served as a dual-mode sensing platform, enabling the enhancement of detection performance. This system achieved a low detection limit of 1.55 μM and 2.57 μM for colorimetric and fluorescence detection of MP, alongside exceptional selectivity against interfering species and promising stability for 35 days. Finally, a portable DOTA(Zn)-CDs-based gelatin cube sensor was successfully constructed for practical, on-site detection. This work provides a fundamental strategy for designing efficient OPHs-like nanozymes by biomimetic active site engineering and underscores their significant potential for rapid environmental, agricultural and food detection.
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PubMed
高影响因子
Catalysts
·
2026
·Vol. 16
·期 3
·227
·
IF 4.5
Yuanding Hu,Yuanyuan Gao,Jiawen Zhang,Zhongyi Liu,Qiaoyun Liu
3-Acetyl-1-propanol (3-AP) is a key intermediate in the pharmaceutical and pesticide industries, which can be synthesized from the biomass derivative 2-methylfuran (2-MF) through a one-step hydrogenation process with significant economic and environmental benefits. Zeolite-supported metal catalysts showed feasible application, but simply regulating the acidic sites was difficult to break the activity–selectivity balance. Traditional single-metal Pd-based catalysts still suffer from low dispersion. This study constructed the PdZn/TS-1 catalyst for the efficient conversion of 2-MF into 3-AP. The low electronegativity of Zn facilitates the electron transfer from Zn to Pd, forming an electron-rich Pd active center. A small amount of Zn embedded in the Pd lattice causes lattice contraction, optimizing the spatial configuration of active sites. The synergy between the electronic and structural effects significantly improves catalytic performance. Under optimized conditions, the conversion rate of 2-MF reached 80.6%, and the yield of 3-AP reached 69.1%, providing a new paradigm for the design of catalysts for the directed hydrogenation of furan derivatives.
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JOURNAL OF COORDINATION CHEMISTRY
·
2023
·
IF 1.9
Xiao-Tong Song,Ying Zhou,Gui-Bao Liu,Hui-Chao Guan,Shu-Mei Yue
By single-crystal X-ray diffraction (XRD) analysis, five complexes, catena-[(µ-2,2-bis(4-carboxyphenyl)hexafluoropropane)-(2-(pyidin-2-yl)-1,3-benzothiazole)-aqua-zinc(II)] (1), catena-[(µ-2,2-bis(4-carboxyphenyl)hexafluoropropane)-(2-(pyidin-2-yl)1,3-benzothiazole)-aqua-cadmium(II)] (2), catena-[hepta(µ-2,2-bis(4carboxyphenyl)hexafluoropropane)-diaqua-bis(2-(pyidin-2-yl)-1,3-benzothiazole)-tri-manganes(II)] (3), catena-[(µ-benzene-1,2,4,5-tetracarboxylato)-(2-(pyidin-2-yl)-1,3benzothiazole)copper(II)] (4) and catena-[(µ-3-nitrobenzene-1,2-dicarboxylato)-(2-(pyidin-2-yl)1,3-benzothiazole)-aqua-zinc(II)] (5), were characterized in this research. In these five complexes, H2hfipbb = 2,2-bis(4-carboxyphenyl)hexafluoropropane, H4btec = 1,2,4,5-benzenetetracarboxylic acid, H2NPTA = 3-nitrophthalic acid and bpt = 2-(pyridin-2-yl)benzo[d]thiazole). Complexes 1 and 2 occur in the monoclinic system with space group C2/c, 4 and 5 occur in the monoclinic system with space group P21/c, and 3 occurs in the triclinic system with space group P-1. The interaction between CT-DNA (calf thymus DNA) and those complexes was examined using UV spectroscopic analysis, fluorescent spectroscopic analysis, circular dichroism spectroscopy (CD) and viscosity analysis. This research reveals that those complexes have strong ability to interact with DNA, and they all bind to DNA in an intercalation mode, thus affecting the structure of DNA. This binding mode can arise from the interaction between the benzothiazole metal complexes and DNA. Hence, we hope to provide some scientific research bases for studying benzothiazole complexes and designing new thiazole anticancer drugs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuying Yang,Mengmeng Sun,Zhuoyuan Chen,Hengyue Xu,Xiaohui Wang,Jizhou Duan,Baorong Hou
Solar energy-driven photoinduced cathodic protection (PICP) technology utilizes solar energy to protect marine metallic structures against severe marine corrosion. To enhance the solar energy utilization and strengthen dark-state application for realizing long-term protection, herein, a 3D nanothorn cluster-like WO 3 /ZnO/Zn-Bi 2 S 3 multijunction with electron-storage characteristic and adjustable energy band was constructed. It exhibited an enhanced continuous release of photogenerated electron and sustained cathodic protection in dark conditions. Exposed to only 100 s of simulated sunlight irradiation, the WO 3 /ZnO/Zn-Bi 2 S 3 could store 5.27×10 −2 C electrons and provide up to 5460 s of sustained CP for the coupled metal after light stops, which was 10.8 and 3.5 times higher than those of WO 3 /ZnO (4.89×10 −3 C) and WO 3 /Zn-Bi 2 S 3 (1.51×10 −2 C), respectively. The WO 3 nanothorn cluster-like substrate with reversible valence transformation of W 6+ /W 5+ together with the large surface area and one-dimensional transmission path can store photogenerated electrons under illumination and release photogenerated electrons after light stops efficiently. Notably, the tri-phase heterojunction with introduction of intermediate “Carrier Springboard” ZnO between WO 3 and Zn-Bi 2 S 3 contributed to the building of well-matched energy band gradient to strengthen the directional backward transfer of photogenerated electrons and holes. The energy band of Bi 2 S 3 sensitizer was adjusted towards negative direction by doping with zinc element to boost PICP application performance. The reversible valence transformation of Bi 3+ /Bi 5+ could promote the consumption of photogenerated holes. These synergistically enhanced the sustained PICP performance of the WO 3 /ZnO/Zn-Bi 2 S 3 photoelectrode both in dark and light conditions. This design shed light on energy-storage photoelectrodes for long-term PICP of metallic materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Heming Huang,Yangjun Luo,Li Zhang,Huijuan Zhang,Yu Wang
Transition metal catalysts for replacing noble metals have been extensively studied, but the deficiencies in intrinsic activity and stability limit their application in electrocatalysis . Here, we present CoNi alloy nanoparticles loaded on Ti 4 O 7 supports and embedded in N, S doped carbon nanofibers by electrospinning method. The prepared CoNi/Ti 4 O 7 @NS-CNFs exhibits satisfactory ORR and OER activities with a low potential gap of 0.664 V and shows a high stability over long periods of testing, which are superior to most of the transition metal catalysts reported so far. Accordingly, the Zn-air battery constructed with the prepared catalyst demonstrates a maximum power density of 165.7 mW cm −2 and a specific capacity of 788.4 mA h g Z n - 1 (1.61 and 1.14 times higher than that of Pt/C + IrO 2 , respectively). The addition of S element and corrosion-resistant Ti 4 O 7 plays a significant part in the morphology and activity of the prepared catalyst, which optimizes the distribution and electronic structure of active centers, and improves the stability of the catalyst. This effort provides a possible approach to exploring the efficient performance of the other transition metals.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wenwen Wang,Yutang Kang,Canyu Cui,Xinyan Lv,Zisheng Wang,Boran Wang,Yumei Tan,Shihui Jiao,Guangsheng Pang
A hierarchical micro/nanostructure has been successfully fabricated, which is constructed by anchoring polyethersulfone (PES) nanoparticles on Zn-Ni-Co layered double hydroxide (LDH) nanowires with stainless steel mesh as supporter (PES/PDA@ZNCNW-SSM). The PES/PDA@ZNCNW-SSM shows excellent underliquid dual superlyophobicity with underwater tetrachloroethylene contact angle and under n-hexane water contact angle of 166.7° and 166.8°, respectively. The underliquid dual lyophobic PES and microporous structure formed by Zn-Ni-Co LDH nanowires synergistically contribute to the underliquid dual superlyophobic surface, which is beneficial for effective and controllable organic liquid/water separation. After 10 cycles of alternate separation, the separation efficiencies of PES/PDA@ZNCNW-SSM are above 99.9% and 99.4% for water-in-tetrachloroethylene and tetrachloroethylene-in-water emulsions, respectively. The underliquid dual superlyophobicity can also be obtained with carbon cloth, non-woven fabric, Ni foam and filter paper as supporter and the corresponding membranes can be used to efficiently separate organic liquid/water mixtures on-demand. These results confirm that the hierarchical micro/nanostructure anchored with underliquid dual lyophobic PES nanoparticles is an effective route for the preparation of underliquid dual superlyophobic materials.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Yuewen Shao,Kai Sun,Mengjiao Fan,Guoming Gao,Junzhe Wang,Lijun Zhang,Shu Zhang,Xun Hu
Copper-based catalysts are active for hydrogenation, while they are prone to sintering in hydrothermal conditions. In this study, alloying Cu with Ni and Zn was adopted to suppress sintering of copper species in the catalyzed conversion of furfural to cyclopentanone (CPO) and cyclopentanol (CPL) in the aqueous phase. The results indicated that Zn acted as a “glue” for aiding the formation of CuZn or CuNiZn alloy. The formation of the ternary CuNiZn alloy in CuNiZn/Al2O3 catalyst created the developed porous structure, induced the formation of abundant Lewis acidic sites and Brønsted acidic sites, and enhanced the dispersion and the total surface area of Cu species. These together rendered CuNiZn/Al2O3 with superior activity to monometallic or bimetallic Cu-based catalysts for the production of CPO and CPL (sum yield of 86% over Cu1.0Ni1.0Zn1.0/Al2O3), which was attributed to the synergy between CuNiZn alloy and Brønsted acidic sites. Alloying Ni with Cu and Zn weakened the adsorption of the C═C bond in the furan ring of furfural, while enhancing the activation of C═O and C–O–C bonds in furfural, avoiding the deep hydrogenation of the furan ring, facilitating the rearrangement of furfuryl alcohol to CPO, and improving the turnover frequency for the production of CPO from furfural remarkably (1011.3 h–1 over Cu1.0Ni1.0Zn1.0/Al2O3 vs 23.9 h–1 over Cu1.0/Al2O3). The formation of ternary CuNiZn alloy could not only suppress the sintering of metallic Cu species during the reduction in hydrogen but also effectively prevent the aggregation of Cu species in the aqueous phase, enhancing the catalytic stability under hydrothermal conditions.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Longlong Liu,Zunpeng Hu,Minghui Wang,Jinliang Ma,Zihao Chen,Xin Ning,Ding Yuan
The construction of a hybrid hierarchical architecture is a promising strategy for optimizing the electrocatalytic activity and the performance of flexible Zn-air battery. However, it still remains a challenging task. This study reports on the use of a simple approach in the preparation of a flexible 3D self-supporting bifunctional catalyst. Ultrathin NiFe-based layered double hydroxide nanosheets (NiFe-LDH) have in this approach been strongly coupled to a metal-organic framework (MOF)-derived carbon nanoflake array, to be used in flexible Zn-air batteries. Importantly, the introduction of Co nanoparticles that were anchored onto the nitrogen-doped porous carbon (Co-NC) nanoflakes provided an abundance of active sites for the oxygen reduction reaction (ORR). Moreover, the catalytic oxygen evolution reaction (OER) process was improved by altering the local electronic structure of the Ni and Fe species in NiFe-LDH. The 3D interconnected conductive network structure, in addition to the strong coupling between NiFe-LDH and Co-NC, was found to give a catalyst with superior electrocatalytic OER performances. The overpotential was only 284 mV at 50 mA cm −2 in an alkaline medium, which is a result that outperforms the commercial RuO 2 catalyst. This bifunctional catalyst did also exhibit a good catalytic performance that is comparable to that of commercial Pt/C towards ORR. Interestingly, when this catalyst was used as binder-free air cathode, the assembled flexible solid-state Zn-air battery demonstrated a favorable power density, cycling stability, and mechanical flexibility. The present work offers a facile and efficient strategy for the development and construction of self-supporting bifunctional OER/ORR electrocatalysts , to be used in wearable and flexible electronic devices.
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