JOURNAL OF MATERIALS SCIENCE
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2026
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IF 4.4
Zhang Wanying,Dou Feng,Wang Shuhong,Wang Cheng
Multi-level storage is an effective way to increase storage density compared to binary storage. In this study, a D–A copolymer containing two different electron-withdrawing receptors was designed and synthesized, and the polymer was applied to resistive random access memory (RRAM), which exhibited flash-type ternary memory behaviour. In addition, Cu nanoparticles (NPs) were embedded in the polymer to improve the prepared storage performance. In addition, Cu NPs were embedded in the polymer to improve the prepared storage performance. The memory devices based on PCz–BB:Cu nanocomposites also exhibit flash memory performance with a threshold voltage drop from − 1.05/ − 1.95 to − 0.45V/ − 0.90V, an ON2/ON1/OFF current ratio increase from 1905:15:1 to a boost of 8950:50:1, and the three resistive states of the devices being stable for more than 3h and 10 4 cycles. The mechanism of resistive switching is explained in terms of charge trapping and conducting filament theory. This work contributes to the rational design and fabrication of high-density storage materials.
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高影响因子
Green Energy & Environment
·
2026
·
IF 16.7
Xiangyu Guo,Changxue Xie,Xinyao Dong,Han Xiao,Huiye Wei,Kaidi Mao,Tongan Yan,Yunpan Ying,Huina Wang,Chongli Zhong
Highly c-oriented Cu-TCPP ultrathin membrane was prepared through in-situ conversion method. • Green solvents and minimal amount of ligand were used in membrane preparation process. • The membrane can efficiently discriminate linear molecules from non-linear and non-planar molecules. • The shape-based separation mechanism was verified by DFT calculation. Efficient separation of molecules with similar molecular weights is highly demanded in chemical and pharmaceutical industries, yet still hard to achieve with traditional polymer-based membranes. Metal-organic framework (MOF) membranes, especially ultrathin two-dimensional (2D) MOF membranes, offer a good opportunity for realizing these separations. However, current 2D MOF membranes are mainly prepared through the deposition method, which can bring uncertainty to the pore channels, compromising the separation ability. This work reports the preparation of a highly c-oriented ultrathin Cu-TCPP membrane through an electrostatic-assisted in-situ oriented transformation strategy using electrostatically adsorbed copper hydroxide nanostrands as a precursor layer. The resultant membrane has explicit transport channel to be the pores of Cu-TCPP, which enables the efficient discrimination of linear molecules from non-linear and non-planar molecules with similar and even lower molecular weights. Both the experimental work and density functional theory calculations confirm the sieving effect of the Cu-TCPP membrane towards two model molecules (methyl orange and hematoxylin). This work provides a paradigm for fully utilizing the potential of MOF membranes in the precise separation of molecules with similar molecular weights. Effective nanofiltration separation of molecules with similar molecular weights based on steric shape difference is enabled by the ultrathin c-oriented Cu-TCPP membrane prepared through a green and facile electrostatic assisted in-situ conversion strategy Download: Download high-res image (321KB) Download: Download full-size image
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Journal of Cleaner Production
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2019
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IF 6.395
Junwen Qi,Guoping Wei,Yubo Yan,Xiuyun Sun,Lianjun Wang,Jiansheng Li
Protecting the staff on site from exposure risk to toxic industrial chemicals (TICs) in an efficient way is of great significance. However, simultaneous removal of multicomponent TICs with different physical and chemical properties is a challenge for porous carbon materials. In this work, Cu-carbon beads with tailored porous structure and chemical property were synthesized via phase inversion-carbonization (PIC) route. The in-situ introduction of copper species was accomplished via coupling solidification-reduction of copper species and PIC process. The obtained Cu-carbon beads possessed uniform spherical shape (Φ1.3 mm) with good mechanical strength, developed porous structure and abundant chemical groups. Three kinds of TICs with different chemical properties, i.e. benzene (nonpolar), ethanol (polar) and H 2 S (inorganic), were selected as probes to evaluate the simultaneous elimination performance of Cu-carbon beads. The optimized Cu-beads-3 exhibited excellent performance for multicomponent TICs with capacities of 491.9 mg benzene/g, 192.1 mg ethanol/g and 76.2 mg H 2 S/g, representing 74.0, 60.3 and 99.2% capacities compared with monocomponent TICs. The enhanced adsorption of H 2 S were ascribed to chemisorption of copper species and basic groups on Cu-carbon beads. These results indicated that Cu-carbon beads would be a promising candidate for the simultaneous elimination of TICs with different chemical properties.
研究领域:
环境科学
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材料科学
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SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Libo Shi,Xiang Zhu,Tingting Liu,Hongli Zhao,Minbo Lan
In this work, we applied metal-organic frameworks (MOFs) as a porous matrix to encapsulate Cu nanoparticles (NPs) for nonenzymatic glucose sensing in alkaline media . SEM and TEM confirmed that the size of the encapsulated Cu NPs ranges from 2.5 to 5 nm. The hybrid of Cu NPs encapsulated in ZIF-8 (Cu-in-ZIF-8) was further modified onto screen-printed electrodes for nonenzymatic sensing of glucose in alkaline medium. The porous structure of ZIF-8 are beneficial for the unimpeded diffusion of glucose and reaction product. And as a matrix for encapsulating Cu NPs, ZIF-8 also protect the Cu NPs from dissolution and agglomeration during the electrocatalytic process. For comparison, the electrochemical performance of Cu NPs loaded on ZIF-8 (Cu-on-ZIF-8) was also investigated and it is found that Cu-in-ZIF-8 exhibited higher activity and better stability for cyclic test toward the oxidation of glucose in alkaline media. Additionally, Cu-in-ZIF-8 based glucose sensor also shows a favorable sensitivity and selectivity.
研究领域:
材料科学
·
分析化学
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Desalination and Water Treatment
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2024
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IF 1
Fengli Shao,Shaoyu Zhou,Jiaxin Xu,Qiong Du,Jianqiu Chen,Jingge Shang
Nanoscale zero-valent iron (nZVI) has been proven to be more effective for the treatment of hexavalent chromium(Cr(VI)) when modified with the transition metal Cu. In this study, biochar-supported Cu/Fe bimetallic nanoparticles (Cu-nZVI/BC) were prepared and used for Cr(VI) removal from aqueous solution. The effects of the pH value, the initial concentration of Cr(VI), coexisting ions and humic acids (HA) were investigated. The compositional structures of Cu-nZVI/BC were analyzed by transmission electron microscopy, scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The maximum removal efficiency of Cr(VI) was 50.57% (126.41 ± 3.75 mg g –1 ) for Cu-nZVI/BC at pH 2. The adsorption kinetic data were in agreement with the pseudo-second- order model, which confirmed that the adsorption step was a chemical adsorption and reduction process. The presence of Ca 2+ and NO 3 – had an inhibitory effect on Cr(VI) removal, while dHA increased the removal efficiency at high concentrations. This study proves that Cu-nZVI/BC removal of solution Cr(VI) is feasible and shows significant potential in practical applications.
研究领域:
环境科学
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纳米技术
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水处理
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污染物修复
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Journal of Energy Chemistry
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2022
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IF 13.599
Huan Xie,Ruikuan Xie,Zhiyuan Zhang,Yongyu Pang,Yuting Luo,Jiong Li,Bilu Liu,Maria-Magdalena Titirici,Guoliang Chai
The conversion of CO 2 into value-added chemicals coupled with the storage of intermittent renewable electricity is attractive. CuO nanosheets with an average size and thickness of ∼ 30 and ∼ 20 nm have been developed, which are in situ reduced into Cu nanosheets during electrochemical CO 2 reduction reaction (ECO 2 RR). The derived Cu nanosheets demonstrate much higher selectivity for C 2 H 4 production than commercial CuO derived Cu powder, with an optimum Faradaic efficiency of 56.2% and a partial current density of C 2 H 4 as large as 171.0 mA cm −2 in a gas diffusion flow cell. The operando attenuated total reflectance-Fourier transform infrared spectra measurements and density functional theory simulations illustrate that the high activity and selectivity of Cu nanosheets originate from the edge sites on Cu nanosheets with a coordinate number around 5 (4–6), which facilitates the formation of *CHO rather than *COH intermediate, meanwhile boosting the C C coupling reaction of *CO and *CHO intermediates, which are the critical steps for C 2 H 4 formation.
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SENSORS
·
2023
·Vol. 23
·期 2
·695
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IF 3.9
Zhipeng Yu,Huan Wu,Zhongshuang Xu,Zhimao Yang,Jian Lv,Chuncai Kong
Designing highly active material to fabricate a high-performance noninvasive wearable glucose sensor was of great importance for diabetes monitoring. In this work, we developed CuxO nanoflakes (NFs)/Cu nanoparticles (NPs) nanocomposites to serve as the sensing materials for noninvasive sweat-based wearable glucose sensors. We involve CuCl2to enhance the oxidation of Cu NPs to generate Cu2O/CuO NFs on the surface. Due to more active sites endowed by the CuxO NFs, the as-prepared sample exhibited high sensitivity (779 μA mM−1cm−2) for noninvasive wearable sweat sensing. Combined with a low detection limit (79.1 nM), high selectivity and the durability of bending and twisting, the CuxO NFs/Cu NPs-based sensor can detect the glucose level change of sweat in daily life. Such a high-performance wearable sensor fabricated by a convenient method provides a facile way to design copper oxide nanomaterials for noninvasive wearable glucose sensors.Keywords:noninvasive wearable sensing;metal oxide;sweat glucose detection
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高影响因子
Journal of Physical Chemistry C
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2023
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IF 3.7
Minglu Li,Siyu Kuang,Hai Liu,Qun Fan,Sheng Zhang,Xinbin Ma
Significant efforts have been devoted to the investigation of catalysts for converting CO2 into C2+ products. Cu catalysts are attractive for their initial selectivities but limited by the low stability over time. Herein we investigated the stability of Cu catalysts in an operating CO2RR environment. Hydroxides in electrolytes were found to play a key role in morphology evolution of Cu catalysts and thus result in decreasing Faradaic efficiencies of C2+ products. To this end, we deposited a porous carbon overlay on Cu catalysts through a thermal annealing method. Physical characterizations and electrochemical measurements showed that the morphology of Cu catalysts and Faradaic efficiencies of products were well maintained during the reaction. As evidenced by Fourier transform infrared spectroscopy with phenolphthalein as a probe, the added carbon overlay could effectively resist the influence of hydroxide corrosion on Cu catalysts. This study provides an efficient strategy to improve the stability of copper catalysts toward electrochemical CO2 reduction.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
Erjian Huang,Yueyang Xu,Yachun Ren,Peng Zhang,Yongping Zeng
Faujasite (FAU)-type zeolites are promising adsorbents for the removal of sulfides from fuels, but their micropores are not capable to accommodate the large-sized thiophenic compounds. FAU zeolites (NaX and NaY with the low and high Si:Al ratios, respectively) with hierarchical micro/mesoporous structures were synthesized by sequential acid-base treatment to enhance the adsorption capacity and reduce the limitations of diffusion for the sulfides. To further to improve the desulfurization performance, the hierarchical structure of FAU zeolites containing Cu + were prepared by ion-exchange and methanol vapor-induced reduction methods at a relatively low temperature (473 K). For the large-sized benzothiophene , both the HP-Cu(I)Y and HP-Cu(I)X zeolites with mesopores have a very high adsorption capacity, reaching 51.8 mg S/g and 56.1 mg S/g, respectively. In addition, the results show that HP-Cu(I)X has a higher adsorption capacity than that of some other FAU-type adsorbents reported.
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COMPOSITE INTERFACES
·
2022
·
IF 2.839
Han He,Yehua Jiang,Juanjian Ru,Rong Zhou,Yixin Hua
The surface metallization of zirconia-toughened alumina (ZTA) particles with Ni–Cu bimetallic coatings is performed by electroless plating assisted with choline chloride–ethylene glycol (ChCl-EG) ionic liquid. The possible reactions and deposition sequences of the plating process have been analyzed based on the micro-morphologies of the Ni–Cu coated ZTA (ZTA@Ni–Cu) particles obtained at different reaction stages. The roles of ChCl-EG additive, reaction temperature, and ZTA concentration on the surface morphology, coating thickness, and element content of the ZTA@Ni–Cu particles are also investigated. Results show that uniform cauliflower-characteristic Ni–Cu coatings are formed on ZTA surfaces with 35 g·L−1 ChCl-EG at 65°C. The coating thickness is about 26.9 μm, and the element contents of Cu and Ni are 38.1 at% and 61.9 at%, respectively. Besides, a schematic illustration about the fabrication of ZTA@Ni–Cu particles is proposed to elaborate the formation process of Ni–Cu coatings and the function mechanism of ChCl-EG additive.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hongwei Yang,Fang Xu,Yulong Liao,Yong Ren,Guixiang Liu,Yan Yang,Xueying Wang,Bo Dai
In this work, we prepared a type of LiZnTiCu ferrite with a large grain size and enhanced magnetic properties at ∼900 °C by substituting Cu 2+ ions and doping LBSCA glass. Rietveld refinement of XRD patterns indicates that the Fe 3+ ions in B sites are partially replaced by the Cu 2+ ions, which causes the monotone increase of lattice constant . SEM results show that the interaction of CuO nanoparticles and LBSCA glass causes two changes in the grain growth of the LiZnTiCu ferrites. The grain growth is suppressed when the amount of CuO nanoparticles is less than a threshold value (x = 0.05 for 900 °C; x = 0.20 for 875 °C). However, when enough CuO nanoparticles are added, the ferrites possess a large and compact microstructure. The variation of magnetic hysteresis ( M - H ) loops confirms that M s follows the Néel's collinear spinel model with the increasing number of CuO nanoparticles (x ≤ 0.25). Finally, a type of LiZnTiCu ferrite (x = 0.15) with uniform large grains (average size >10 μm) and good magnetic parameters (4π M s = 3457.59 G, H c = 224.4 A/m and B s = 236.4 mT) is obtained at ∼900 °C.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jian Zhang,Zhipeng Liu,Hongshan Guo,Haoran Lin,Hao Wang,Xiao Liang,Hanlin Hu,Qibin Xia,Xiaoxin Zou,Xiaoxi Huang
Ethylene (C2H4) is an important product in carbon dioxide electroreduction (CO2RR) because of the essential role it plays in chemical industry. While several strategies have been proposed to tune the selectivity of Cu-based catalysts in order to achieve high C2H4 faradaic efficiency, maintaining high selectivity toward C2H4 in CO2RR remains an unresolved problem hampering the deployment of CO2 conversion technology due to the lack of stable electrocatalysts. Here, we develop a facile method to deposit a layer of Cu2O on Cu foil by an electrochemical pulsed potential treatment. This method is capable to easily scale up and synthesize multiple electrodes in one step. After the synthesis, the pulsed copper foil, denoted as P-Cu, exhibits good C2H4 faradaic efficiency of ∼50% in CO2RR at a potential around −1.0 V vs. RHE. The C2H4 selectivity is also found to be quantitatively correlated with the roughness factor (RF) of Cu-based catalysts. More importantly, for the first time, we demonstrate that the P-Cu electrode is quite durable in CO2RR to produce C2H4 for more than 6 months.
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高影响因子
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