DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Chenjie Liu,Yijin Wang,Wenlong Xu,Ming Zhou,Fuliang Meng,Xianfeng Meng
In light of electromagnetic pollution caused by the excessive or unregulated use of electromagnetic waves (EMWs), there is an urgent requirement to identify economical EMWs absorption materials. However, the facing challenge lies in the precise design of microstructure and the controlled tuning of electromagnetic parameters. Herein, natural cottonwood fiber was converted into carbon fiber (CF) through optimized pyrolysis, followed by the synthesis of CFs@Co 3 O 4 /Co(OH) 2 composites via in situ hydrothermal method. Ingenious structural design, multi-faceted synergy and heterogeneous interfaces endowed the CFs@Co 3 O 4 /Co(OH) 2 composites with exceptional impedance matching and electromagnetic loss, showing outstanding EMWs absorption ability. The CFs@Co 3 O 4 /Co(OH) 2 sample (CF S @Co-25) with 2.5 mm thickness displayed a maximum reflection loss ( RL max ) of −78.7 dB and an effective absorption bandwidth ( EAB ) of 9.9 GHz. At 3.0 mm matching thickness, the impedance matching value ( Z ) reached 0.99, with an RL max of −105.3 dB. This work offers a scalable and economical approach to developing high-performance carbon-based EMWs absorbers.
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高影响因子
Journal of the American Chemical Society
·
2025
·
IF 15.6
Wenjun He,Yueshuai Wang,Yilong Zhao,Cheng Tang,Linchuan Cong,Changli Wang,Yue Lu,Xin Liu,Juncai Dong,Serhiy Cherevko,Qingsong Hua,Qiang Zhang
Achieving stable and efficient alkaline water electrolysis (AWE) under fluctuating renewable energy inputs is essential for large-scale green hydrogen production. However, frequent shutdown-induced reverse current (RC) effects pose significant challenges to electrode durability. Here, we introduce a gradient interlayer engineering strategy to develop robust AWE electrodes that intrinsically resist both electrochemical reconstruction and mechanical fatigue. By constructing a dense interlayer with Ni(112̅)/Ni3S2(1̅20) heterointerfaces, the electrode demonstrates high catalytic activity (1.79 V @1000 mA cm–2─meeting the U.S. DOE 2026 target), excellent operational stability (>1500 h at 1000 mA cm–2 in 30 wt % KOH at 80 °C), and exceptional RC resistance for 3600 accelerated startup/shutdown cycles. Mechanistic studies through cross-sectional characterizations and theoretical calculations reveal that the seamless interlayer at the catalyst–substrate interface enhances interfacial adhesion, mitigates lattice mismatch, and facilitates charge redistribution, ensuring robust stability and integrity even under operational strains and potential reversals. This work establishes interface crystallography as a design paradigm for durable electrodes, potentially overcoming the stability–activity dilemma toward industrially relevant electrolyzers coupled with fluctuating renewable energy sources.
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PubMed
高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 24
·5274-5281
·
IF 7.804
Lulu Jia,Hao Wan,Xiaohe Liu,Gen Chen,Ning Zhang,Junhui Li,Wei Zhou,Yijun Cao,Renzhi Ma,Guanzhou Qiu
Morphology and composition tuning of layered materials is evaluated to influence their electrochemical performance for energy storage and conversion applications. Layered Co 1− x Ni x hydroxides ( x= 0, 1/2, 1/3, 1/4, 1) of three different morphologies—nanocones, 2 D nanosheets obtained by the rapid exfoliation of nanoconical counterparts, and 2 D superlattice-like nanostructures alternately restacked by the oppositely charged hydroxide and graphene oxide (GO) nanosheets—have been systematically investigated for electrocatalytic oxygen oxidation. High activity is obtained with the 2 D Co 2/3 Ni 1/3 hydroxide nanosheets/GO superlattice (Co 2/3 Ni 1/3 NS–GO), achieving a current density of 10 mA cm −2 at a low overpotential of 259 mV accompanied by a small Tafel slope of 35.7 mV dec −1 , surpassing nanocones and 2 D nanosheets, as well as the congeneric heterostructured Co 1− x Ni x hydroxide nanosheets/GO nanoarchitectures (Co 1− x Ni x NS–GO; x= 0, 1/2, 1/4, 1) and the commercial RuO 2 electrocatalyst. The outstanding activity of Co 2/3 Ni 1/3 NS–GO superlattice uncovers the combined merits of 2 D superlattice-like structure and composition optimization for electrocatalysis, providing a strategy for developing high-performance electrochemical materials by rational morphology and composition design. Graphical A super lattice : Composition and morphology optimization was used to develop a 2 D Co 2/3 Ni 1/3 hydroxide/graphene oxide superlattice with high activity for oxygen evolution, achieving a current density of 10 mA cm −2 at a low overpotential of 259 mV accompanied by a small Tafel slope of 35.7 mV dec −1 . The outstanding activity of the superlattice highlights the importance of morphology and composition optimization for electrocatalysis.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 54
·e202201687
·
IF 5.02
Jiaqi Ke,Yufei Zhang,Yibo Zhang,Minghui Ye,Zicheng Zhang,Yongchao Tang,Xiaoqing Liu,Cheng Chao Li
Rechargeable zinc-ion batteries (ZIBs) are potential for grid-scale applications owing to their safety, low price, and available sources. The development of ZIBs cathode with high specific capacity, wide operating voltage window and stable cyclability is urgently needed in next-generation commercial batteries. Herein, we report a structurally crystalline-stable Mn(VO 3 ) 2 nanobelts cathode for ZIBs prepared via a facile hydrothermal method. The as-synthesized Mn(VO 3 ) 2 exhibited high specific capacity of 350 mAh g −1 at 0.1 A g −1 , and maintained a capacity retention of 92 % after 10,000 cycles at 2 A g −1 . It also showed good rate performance and obtained a reversible capacity of up to 200 mAh g −1 after 600 cycles at 0.2 A g −1 under −20 °C. The electrochemical tests suggest that Mn(VO 3 ) 2 nanobelts impart fast Zn 2+ ions migration, and the introduction of manganese atoms help make the structures more indestructible, leading to a good rate performance and prolonged cycle lifespan. Graphical The crystalline-stable Mn(VO 3 ) 2 nanobelts cathode presents the specific capacity of 350 mAh g −1 at 0.1 A g −1 and maintain a capacity retention rate of 92 % for 10,000 cycles at a current density of 2 A g −1 . It also rendered good rate performance and obtained a reversible capacity of up to 200 mAh g −1 after 600 cycles at 0.2 A g −1 even under −20 °C. Benefiting from the unique tunnel type nanobelts structure, the Mn(VO 3 ) 2 nanobelts show high Zn 2+ migration kinetics and stable framework for reversible ions de-/insertion.
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高影响因子
ChemElectroChem
·
2023
·Vol. 10
·期 16
·e202300184
·
IF 4
Yang Su,Hai-Lin Ren,Shuai Zhao,Ping-Ping Sun,Jia-Qi Li,Xiao-Min Wang
In this paper, [Ni 0.9 Co 0.1 ](OH) 2 precursor is used to dope H 3 BO 3 to synthesize positive electrode material when mixing lithium in wet method, and to explore the best doping by testing the microscopic morphology and electrochemical performance of the positive electrode material amount and calcination temperature. After doping with B, the microstructure of the material is improved, and the primary crystal grains are oriented and agglomerated into a needle shape. This good crystal structure can slow down the generation of grain microcracks and mechanical fracture, and improve the cycle stability of the positive electrode material. After doping B, the discharge specific capacity was slightly improved. When the calcination temperature is 750 °C and the doping amount of B is 1.0 mol%, the first discharge specific capacity reaches 223 mAh g −1 . More importantly, the capacity retention rate of the battery after 100 cycles has been greatly improved, from 74 % without doping B to 87 %. Graphical Li-ion Batteries : The B-doping improves the microstructure of the material, and the primary grains are oriented and agglomerated into a long needle shape. This good crystal structure can slow down the generation of grain microcracks and mechanical breakage, and improve the cycling stability of the cathode material.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2014
·
IF 2.129
Ke Zhang,Zheng-yin Yang,Bao-dui Wang,Shao-Bo Sun,Ying-Dong Li,Tian-rong Li,Zeng-chen Liu,Jun-mei An
A new Schiff-base ligand ( 1 ) with good fluorescence response to Al 3+ , derived from 2-oxo-quinoline-3-carbaldehyde and nicotinic hydrazide, had been synthesized and investigated in this paper. Spectroscopic investigation revealed that the compound 1 exhibited a high selectivity and sensitivity toward Al(III) ions over other commonly coexisting metal ions in ethanol, and the detection limit of Al 3+ ions is at the parts per billion level. The mass spectra and Job’s plot confirmed the 1:1 stoichiometry between 1 and Al 3+ . Potential utilization of 1 as intracellular sensors of Al 3+ ions in human cancer (HeLa) cells was also examined by confocal fluorescence microscopy.
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Feifei Guo,Wanling Rong,Lijuan Chen,Fuai Hu,Shanpeng Wang,Xutang Tao,Zeliang Gao
The orthogonal polarized dual-wavelength laser has attracted increasing attention due to its unique applications in spectral analysis, differential radar, terahertz, etc. In this paper, the Nd-doped LiY(MoO4)2 (LYMO) crystal with a disordered structure is selected as a laser gain medium to obtain the dual-wavelength laser. The fluorescence spectra of the Nd:LYMO crystal show obvious polarization anisotropy, which is caused by the anisotropic lattice field. The π- and σ-polarized stimulated emission cross-sections at 1061 and 1068 nm are calculated to be 17.5 × 10–20, 8.7 × 10–20, 9.1 × 10–20, and 20.6 × 10–20 cm2, respectively. The lasers operating at 1061 and 1068 nm are obtained using c- and a-cut Nd:LYMO crystals, respectively. More importantly, a 1061 and 1068 nm orthogonally polarized dual-wavelength laser is also successfully designed and achieved using a 45°-cut Nd:LYMO crystal; the corresponding optical-to-optical conversion efficiency and slope efficiency are 27.9 and 31.7%, respectively. Our research confirms that the Nd:LYMO crystal can achieve efficient orthogonally polarized dual-wavelength laser output, which would have potential applications in differential frequency and terahertz fields.
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高影响因子
POWDER TECHNOLOGY
·
2019
·
IF 3.413
Cheng Liu,Wencai Zhang,Shaoxian Song,Hongqiang Li,Yong Liu
The effect of depressant 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) on the flotation separation of smithsonite from calcite was studied by micro-flotation and electro-kinetic tests. The micro-flotation results showed that good floatability of both smithsonite and calcite were achieved in the presence of sodium oleate. The depressant PBTCA selectively depressed calcite without interfering the floatability of smithsonite. The mixed minerals flotation results showed that efficiency separation of smithsonite from calcite was achieved using PBTCA as the depressant. Zeta potential measurements indicated that NaOl was able to adsorb on the PBTCA pre-treated smithsonite surface, but failed to adsorb on the PBTCA pre-treated calcite surface.
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高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Xueyang Song,Li Huang,Wenxue He,Chengyong Liu,Fengchun Hu,Yong Jiang,Zhihu Sun,Shiqiang Wei
Electronic metal–support interactions (EMSIs) have opened a new way to tailor the electronic and catalytic properties of supported catalysts. Herein, we demonstrate the EMSIs between Pt nanoparticles and Co(OH)2 flakes grown on SiO2 and show its beneficial effect on enhancing the CO oxidation activity. The EMSI characteristics of the Pt–Co(OH)2/SiO2 catalyst are identified by in situ X-ray absorption fine structure (XAFS) spectroscopy, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and transmission electron microscopy. Quantitative XAFS analysis reveals the presence of metallic-like Pt–Co bonds. The formation of Pt–Co intermetallic bonds allows for electron donation form Co to Pt, leading to the negative charging of the Pt atoms as evidenced by reduced Pt 2p-to-5d electron-transition intensity detected by XAFS spectroscopy and the emergence of a CO adsorption band at 2063 cm–1 in DRIFTS. The significance of EMSIs is manifested by comparing the CO oxidation activity over the Pt–Co(OH)2/SiO2 and Pt/SiO2 catalysts with similar Pt loadings. Pt–Co(OH)2/SiO2 is superior to Pt/SiO2 in both the apparent activation energy (19 vs 64 kJ/mol) and the turnover frequency (0.03 vs 0.003 s–1 at 37 °C). The enhanced activity is attributed to the negative charging of Pt, which downshifts the d-band center and reduces the CO adsorption strength.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2014
·
IF 3.242
Ting-Ting Xu,Jun Zhu,Cong Yuan,Qian-Li Yang,Kun Cui,Chun-Hui Li,Liu-He Wei,Zhi Ma
A series of new polymethylene- b -poly(styrene- co -2-hydroxyethyl methacrylate) (PM- b -P(St- co -HEMA)) and polymethylene- b -poly(styrene- co -2-hydroxyethyl methacrylate- g -poly(ε-caprolactone)) (PM- b -P(St- co -HEMA- g -PCL)) copolymers were successfully synthesized via a strategy combined polyhomologation of ylides, reversible addition–fragmentation chain transfer (RAFT) polymerization and ring-opening polymerization (ROP). Firstly, a hydroxyl terminated polymethylene (PM-OH) was obtained via polyhomologation of ylides followed by oxidation. Then, PM-OH was transformed to a macromolecular chain transfer agent (PM-CTA). Subsequently, RAFT copolymerizations of styrene (St) and 2-hydroxyethyl methacrylate (HEMA) were performed using PM-CTA as chain transfer agent, targeting the well-defined PM- b -P(St- co -HEMA) copolymers with controllable molecular weight and narrow molecular weight distribution. Finally, the ring-opening polymerization of ε-caprolactone was carried out using PM- b -P(St- co -HEMA) copolymer as initiator to achieve PM- b -P(St- co -HEMA- g -PCL) copolymer. The molecular weight and chain structure of the obtained copolymers were characterized by gel permeation chromatography (GPC), proton nuclear magnetic resonance ( 1 H NMR) and Fourier Transform Infrared spectroscopy (FTIR). Moreover, the fabrication of highly ordered porous films using the amphiphilic PM- b -P(St- co -HEMA) copolymers via a static breath-figure process was investigated.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xiao-Liang Yuan,Shu-Chen Yu,Lu Xiao,Ting-Ting Qiu,Xiu-Juan Chen,Xi-Ru Wang,Fang-Qi Cao,Wen-Bin Liu
1-(5-Fluoropentyl)-N-(2-phenylpropan-2-yl)-1 H -pyrrolo[2,3- b ]pyridine-3-carboxamide (5F-CUMYL-P7AICA) represents a novel class of synthetic cannabinoids (SCs), constituting one of the most rapidly evolving groups of new psychoactive substances (NPS) that have been widely abused in recent years. However, precise qualitative analysis and accurate quantification pose significant challenges due to the lack of reference materials (RM) available for forensic drug prohibition and sentencing judges. Consequently, RM or certified reference materials (CRM) are essential for ensuring exact measurements and traceability of results in chemical analyses. The pure 5F-CUMYL-P7AICA candidate was autonomously synthesized through a two-step reaction process and subsequently purified via two-column chromatography. Two quantitative analytical methods were employed during the assessment of the pure 5F-CUMYL-P7AICA: quantitative nuclear magnetic resonance spectroscopy of hydrogen ( 1 H qNMR) method and mass balance (MB) method. For the 1 H qNMR, the mass fraction value reached 99.86% which could be traced back to the internal standard (benzoic acid). For the MB methods, the mass fraction value was 99.90% while the structurally related impurities of the candidate (0.05%), inorganic impurities (0.000006%), water (0.05%), and volatile organic solvent (0, or not detected) have been subtracted. Finally, the certified value was assigned to 99.9%, with an expanded uncertainty of 0.3% ( k = 2). Furthermore, the application of CRM would be finished in our subsequent work, and we anticipate that this high-purity CRM could play an essential role in the field of forensic science and sentencing judgement.
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高影响因子
ANALYTICAL LETTERS
·
2022
·
IF 2.267
Lanying Xu,Yingying Huang,Bingshan Zhao,Limin Ren,Tao Long
β-Cyclodextrin modified magnetic microspheres were synthesized and used as an effective adsorbent for the solid-phase extraction of three phenols from water samples. Scanning electron microscopy and Fourier transform infrared spectrometry were used to characterize the adsorbents. The major parameters affecting the extraction and desorption efficiencies, such as adsorbent dosage, extraction time, pH, ionic strength, and eluent type were systematically optimized. Under these conditions, three phenols in water samples were extracted and determined by high performance liquid chromatography (HPLC) with diode array detection (DAD). Limits of detection (LODs) of 0.04–0.34 ng mL−1 and limits of quantification (LOQs) from 0.13 to 1.14 ng mL−1 were achieved with good repeatability (relative standard deviation <7.5%). The developed method was applied for the determination of 2,4-dichlorophenol, 2,4-dinitrophenol and bisphenol A in spiked Yangtze River water, and the recoveries were from 81.0% to 94.9%. The results demonstrated that the combination of magnetic solid-phase extraction (MSPE) with HPLC-DAD is suitable for the determination of trace phenolics in environmental water.
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高影响因子
危险品化学品经营许可证（带存储）