COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Jingyue Wang,Xueqing Li,Xinqiang Zhao,Yuelong Xu,Tifeng Jiao
Hard carbon (HC) are prepared through a one-step carbonized method to obtain Zn/S co-doping. • The spacing of layers of HC is regulated through the crosslinking degrees of phenolic resins. • The prepared HC has a high performance for sodium-ion batteries. • The heteroaton co-doping and the regulation of layers spacing play a synergistic effect to improve the performance of HC. The abundance and low cost of sodium make sodium-ion batteries a promising candidate for large-scale energy storage applications. However, the development of high-performance anode materials remains a critical challenge. Herein, a series of Zn/S co-doped hard carbon materials are synthesized by high-temperature pyrolysis using phenolic resins with different crosslinking degrees as precursors, zinc chloride as zinc source, and trithiocyanuric acid as sulfur source. The synergistic effect between precursor crosslinking density and heteroatom co-doping on the microstructure and sodium storage performance of hard carbon is systematically investigated. Electrochemical tests demonstrate that the Zn/S-HC 7.5:10-HMTA delivers high reversible capacity, excellent Coulombic efficiency, and stable long-term cycling. Kinetic analysis reveals a dominant capacitive contribution and the highest Na⁺ diffusion coefficient among all samples. This work reveals that an effective approach to achieving high-performance hard carbon anodes for sodium-ion batteries is to optimize precursor crosslinking together with Zn/S co-doping. Download: Download high-res image (139KB) Download: Download full-size image
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高影响因子
Journal of Energy Chemistry
·
2019
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IF 5.162
Bo Lv,Sha Zeng,Wei Yang,Jian Qiao,Chao Zhang,Chengfeng Zhu,Minghai Chen,Jiangtao Di,Qingwen Li
Recently, the development of high-performance bifunctional oxygen catalysts integrated with flexible conductive scaffolds for rechargeable metal-air batteries has attracted considerable interest, driving by fast-growing wearable electronics . Herein, we report a flexible bifunctional oxygen catalyst thin film consisting of Co–N–C bifunctional catalysts embedding in carbon nanotube (CNT) networks. The catalyst is readily prepared by pyrolysis of cobalt-based zeolitic imidazolate frameworks (ZIF-67) that are in-situ synthesized in CNT networks. Such catalyst film demonstrates very high catalytic activities for oxygen reduction (onset potential: 0.91 V, and half-wave potential: 0.87 V vs. RHE) and oxygen evolution (10 mA cm −2 at 1.58 V) reactions, high methanol tolerance property, and long-term stability (97% current retention). Moreover, our integrated catalyst film shows very good structure flexibility and robustness. Based on the obtained film air electrodes, flexible Zn–air batteries demonstrate low charging and discharging overpotentials (0.82 V at 1 mA cm −1 ) and excellent structure stability in the bending tests . These results indicate that presently reported catalyst films are potential air electrodes for flexible metal–air batteries.
研究领域:
材料科学
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电化学
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纳米能源
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先进功能材料
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可再生能源
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Wenlu Yang,Jianing Guo,Jingyuan Ma,Na Wu,Jun Xiao,Mingxing Wu
Developing low-cost, high-efficiency and durable trifunctional electrocatalysts for enhancing the speed of oxygen reduction, oxygen evolution and hydrogen evolution reactions (ORR, OER and HER) is critical for expanding the industrial production and the commercial application of rechargeable Zn-air batteries and water electrolysis, but it still exists as a tremendous challenge. Herein, FeCo nanoalloys embedded into N-doped carbon nanofibers was prepared as a superior trifunctional catalyst for ORR, OER and HER by a universal and facile method. Under the synergistic effect of FeCo nanoalloys and N-doped carbon nanofibers , the Fe, Co/N-C catalyst exhibits half-wave potential of 0.86 V for ORR, and overpotentials of 388 mV and 249 mV at 10 mA·cm −2 for OER and HER, respectively. What’s more, the Zn-air battery based on Fe, Co/N-C catalyst displayed a considerable open-circuit voltage of 1.5 V and a continuous cycle life span of 210 h. Moreover, this catalyst was also used as the sole catalyst in overall water splitting to show excellent performance. This work provides an effective way to design efficient and durable multifunctional electrocatalysts, which will facilitate the development of high-performance multifunctional catalysts and their application in renewable energy applications.
研究领域:
材料科学
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电化学
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能源存储与转换
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纳米技术
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高影响因子
Catalysts
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2023
·Vol. 13
·期 3
·539
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IF 3.9
Yuhao Chen,Mengli Li,Zhuang Xu,Guowang Shen,Xugeng Wang,Bin Dai
In this study, novel Zn catalysts were prepared by the wet impregnation method using printing and dyeing wastewater (PDW)-modified petroleum coke (petcoke) as a carrier, and they were applied to the acetylene acetoxylation. The pretreated petroleum coke has a high specific surface area which provides sufficient space for the loading of Zn. Calcination further increases catalyst activity, but when calcination temperatures exceed 1000 °C, a significant loss of Zn occurs, resulting in a dramatic decrease in catalyst activity. This enables the conversion of acetic acid up to 85%. X-ray photoelectron spectroscopy confirmed that a large amount of N is introduced into PC from PDW, which changes the electron transfer around Zn. Temperature-programmed desorption (TPD) analysis revealed that the nitrogen-doped Zn(OAc)2catalyst enhanced the catalytic activity by modulating the intensity of the catalyzed adsorption of acetic acid and acetylene. This study provides a new way to reuse petroleum coke and printing and dyeing wastewater to support the sustainable development of the vinyl acetate industry.Keywords:wastewater;petroleum coke;vinyl acetate
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高影响因子
FOOD CHEMISTRY
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2023
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IF 8.8
Yan Wu,Yue Zhou,Hongchen Long,Xiangyu Chen,Yuanyuan Jiang,Lei Zhang,Tao Le
The study investigates a bimetallic organic framework (Zn/Eu-MOF) based fluorescent probe for visual detection of ofloxacin (OFL) in pork, beef and fish. The developed sensing probe recognizes OFL through internal filtration and cation-π interaction between OFL and Zn/Eu-MOF, resulting in a distinct color change from orange-red to light green. The content of OFL can be determined through RGB analysis by a mobile-phone. The developed sensing probe offers several advantages such as broad linear range (0.1 ∼ 80 μM), rapid response time (30 s), low detection line (0.44 μM). The effectiveness of the sensing probe can last for five rounds with good recovery. Moreover, the application of the sensing probe on pork, beef and fish samples are reliable, with recoveries ranging from 93.4 to 112.1%, and the relative standard deviations (RSD) within 1.17% to 2.06%. These results suggest that the developed sensing probe could have significant potential for practical on-site test in food.
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Jiongxin Wu,Ying Chen,Li Zhang,Xinxin Sheng
In this study, MXene was functionalized with poly (tannic acid) to prepare MXene@PTA nanosheets . Subsequently, zinc ions (Zn(II)) was introduced into the MXene@PTA to obtain MXene@PTA-Zn(II) hybrids. The successful preparation of the hybrids was confirmed by FTIR, XPS , and SPM analysis. The composite coatings containing MXene@PTA-Zn(II) were then prepared and subjected to tribology and electrochemical tests. The results of the tribology test showed that 4-PMZ/WEP coating (with 0.4 wt% MXene@PTA-Zn(II)) has a uniform and shallow wear trace after 30 min of friction, and its wear rate decreased by 85.29 % in comparison to the blank WEP coating. The electrochemical tests demonstrated 4-PMZ/WEP coating has excellent corrosion resistance , which maintains a high |Z 0.01 Hz |(9.0 × 10 8 Ω·cm 2 ) after 42 days of immersion in the 3.5 wt% NaCl solution. These findings indicate that MXene@PTA-Zn(II) can effectively enhance the anti-corrosion properties and tribological properties of WEP coatings. As a result, this work provides new ideas for applications of MXene in the domain of metal protection.
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高影响因子
JOURNAL OF CATALYSIS
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2023
·
IF 7.3
Yayu Guan,Jiaying Yan,Yuyu Liu,Fanghua Ning,Jin Yi,Jiujun Zhang
Electrochemical CO 2 reduction reaction (eCO 2 RR) is considered an efficient approach to produce value-added chemicals and fuels. In this paper, a series of MOF-derived composite catalysts with coexisting In 2 O 3 and ZnO are fabricated using a simple process for eCO 2 RR to produce formate. The Zn-In-O/800 catalyst achieves a formate Faradaic efficiency (FE HCOO− ) of 94.25 % at −1.16 V vs. RHE, which can maintain over 89 % after 30 h in a stability test. The electrochemical evidence and density functional theory analysis show that the strong interface effect between In 2 O 3 and ZnO can enhance the CO 2 adsorption and activation, and promote the conversion of CO 2 to formate. In addition, the ZnO phase can protect In 2 O 3 , as the main active site, from being reduced to a certain extent for a long time under negative potential, which ensures the high stability of the composite catalyst.
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高影响因子
Journal of Materials Chemistry B
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2023
·Vol. 11
·期 18
·4020-4027
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IF 7
Min Feng,Xiaofang Chen,Yuhang Liu,Yan Zhao,Pran Gopal Karmaker,Jia Liu,Ya Wang,Xiupei Yang
Single-atom catalysts with atomically dispersed sites have been widely used as nanozymes for colorimetric sensing because their tunable M–Nx active centers are similar to those of natural enzymes. However, their low metal atom loading leads to insufficient catalytic activity and affects the sensitivity of colorimetric sensing, which limits their further applications. Herein, multi-walled carbon nanotubes (MWCNs) are selected as carriers to reduce the aggregation of ZIF-8 and improve the electron transfer efficiency of nanomaterials. Meanwhile, MWCN/FeZn-NC single-atom nanozymes with excellent peroxidase-like activity were prepared by pyrolysis on ZIF-8 doped with a second metal Fe. Based on the excellent peroxidase activity of MWCN/FeZn-NCs, a dual-functional colorimetric sensing platform for Cr(VI) and 8-hydroxyquinoline was established. The detection limits of the dual-function platform are 40 nM for Cr(VI) and 55 nM for 8-hydroxyquinoline. This work provides a highly sensitive and selective strategy for the detection of Cr(VI) and 8-hydroxyquinoline in hair care products, which has great application prospects in the field of pollutant detection and control.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Zhenglu Shi,Xing Zhao,Xiaobo Chen,Wenfeng Fu,Lin Lan,Jun Zhang,Francis Chi-Chun Ling,Li Wei,Qiang Ru
Zinc dendrites have a serious impact on the long-cycle performance of zinc storage equipment. Seeking efficient dendrite-inhibiting techniques for zinc anode is a pressing matter and research hotspot. Here, a metal protection strategy is reported, where the Ti 3 C 2 T x MXene film is uniformly coated on zinc anode (MXene@Zn) in parallel alignment under self-traction by an in-situ Langmuir Blodgett Scooping method (LBS). The close contact of the conductive MXene film with the zinc surface facilitates the regulation of zinc stripping/plating to achieve uniform zinc deposition. Meanwhile, the Ti 3 C 2 T x MXene with robust mechanical strength and superior flexibility can suppress the crisscross growth of zinc dendrites. The MXene@Zn electrode shows satisfying dendrite-free morphology and ultralong cycle stability with 1000 h (3 mA cm −2 /0.5 mAh cm −2 ) and 500 h (3 mA cm −2 /0.5 mAh cm −2 ). In addition, according to its additive-free and spontaneous formation of Ti 3 C 2 T x MXene protective structure, the zinc ion batteries have a high-capacity retention of 98.3 %, and the zinc ion capacitors can persist for long periods of 20,000 times stably. This result provides a valid strategy for suppressing zinc dendrites to upgrade the cycling capability of zinc storage.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tianyan Lan,Hongmei Du,Yunwu Li,Konggang Qu,Jinsheng Zhao,Xianxi Zhang,Yunyun Dong,Yan Zhang,Xueyue Zhang,Danyang Zhang
The development of bifunctional electrocatalysts to reduce the polarization loss is essential to enhance the performance of Zn-air batteries. The combination of metal-organic frameworks (MOFs) with metal or metallic compounds provides a way to integrate their merits and effectively improve their electrocatalytic performances. However, previous synthesis of MOFs/metal oxides usually involves high-temperature calcination , which makes it difficult to control their morphologies. In this work, through a ligand-insufficient and high temperature controlled solvothermal reaction, innovative NiFe-MOF/NiFe 2 O 4 hollow nanospheres were one-pot prepared without using any shape-controlled agent or calcination process. The as-obtained NiFe-MOF/NiFe 2 O 4 shows better ORR and OER performance than pure NiFe-MOF and NiFe 2 O 4 , suggesting a synergetic effect between NiFe-MOF and NiFe 2 O 4 . The maximum power density of the liquid Zn-air battery assembled using NiFe-MOF/NiFe 2 O 4 as the air electrode catalyst is 158.4 mW cm −2 at 246.1 mA cm −2 . This work offers fresh thoughts into designing highly efficient MOF-derived electrocatalysts.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Yichuan Wang,Xiaojin Zhang,Yu Dai,Fan Xia
Organometallic nanozymes, organometallics of which mimic the cofactor of natural enzymes, have the advantages of tunable catalytic activity, high stability, and material variety. By assembling organometallics (catalytic site) on inorganic nanoparticles (support), organometallic nanozymes have been rationally designed, but modulating their assembly and activity remains a tough challenge. Here, we construct a photo-modulated organometallic nanozyme by anchoring azobenzene-modified triethylenetetramine (Azo-N4) to the surface of β-cyclodextrin-capped gold nanoparticles (AuNP@CDs) through host–guest interaction, followed by Zn(II) coordination to form organometallics. The catalytic site derives from the outer organometallic layer. The nanozyme catalyzes the hydrolysis of 4-nitrophenyl acetate to 4-nitrophenol and the catalytic signal is used to detect Zn(II). Due to the photoisomerization of azobenzene, the supramolecular assembly of host–guest interaction is modulated by light. The disassembly leads to cascade catalysis of AuNP@CDs-Azo-N4-Zn and the recovery of AuNP@CDs. Our study provides a new idea and reference for the rational design and activity modulation of organometallic nanozymes.
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高影响因子
Journal of Superconductivity and Novel Magnetism
·
2023
·Vol. 36
·期 2
·711-719
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IF 1.8
Huang Danqiang,Wen Xinchao,Dai Jianfeng,Wang Qing,Liu Hui,Li Zengpeng
In this study, SrFe 12 O 19 @MFe 2 O 4 (M = Co, Ni, Zn) core–shell nanofibers were fabricated by coaxial electrostatic spinning. The composites obtained at an annealing temperature of 900 °C are composed of SrFe 12 O 19 in pure phase and MFe 2 O 4 (M = Co, Ni, Zn) in different spinels. X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and transmission electron microscope (TEM) were used to describe the structure and morphology of nanofibers. Magnetic Property Measurement Systems (MPMS) are used to characterize the magnetic properties of nanofibers. Sr@Ni and Sr@Zn fibers all exhibit a unique core–shell structure, while Sr@Co fibers are connected by a lamellar structure. The single-phase hysteresis lines for each composite indicate the presence of exchange coupling effects between the hard/soft magnetic composite phases. The magnetic properties of the composites change as the soft magnetic material in the shell layer changes. Sr@Co has the highest M s (69.43 emu/g) and M r (33.82 emu/g), whereas Sr@Zn has the highest H c (2927 Oe). The switching plant curves indicate that the best exchange coupling of the three groups of samples is for Sr@Co. The magnetic properties of the composites are explained in terms of the nanofiber diameter, the exchange coupling between the two phases, and the nature of the soft magnetic phase itself. It is shown that the exchange coupling of composites is closely related to the type of composite.
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高影响因子
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