ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 21
·26621-26630
·
IF 3.056
Wan Jun,Chen Lin,Li Qiang,Ye Yuxuan,Feng Xiaonan,Zhou Aijiao,Long Xuejun,Xia Dongsheng,Zhang Tian C.
Among the Cu(II) removal methods, adsorption is a favorable technique and has attracted large attention because of its effectiveness and low cost. In quest of seeking for a favorable adsorbent with a high Cu(II) adsorption capacity and excellent reusability, researchers have paid much attention to hydrogels with three-dimensional networks. In this study, a novel hydrogel (P(AMPS-co-VDT) hydrogel) based on free-radical polymerization was synthesized with ionic monomer sodium 2-acrylamido-2-methylpropane sulfate (AMPS-Na + ) and 2-vinyl-4, 6-diamino-1, 3, 5-triazine (VDT) and applied for Cu(II) adsorption in aqueous solutions. The hydrogel was characterized for swelling performance, surface morphology, functional groups, thermal gravimetric behavior, and elements. The maximum Cu(II) adsorption capacity (175.75 mg/g) was relatively high compared with other hydrogels. The P(AMPS-co-VDT) hydrogel also was found to have a relatively good Cu(II) desorption and reuse behavior. The adsorption mechanism could be chelation and ion exchange. This work provides a new hydrogel for effective Cu(II) removal in the future.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
Frontiers of Environmental Science & Engineering
·
2021
·Vol. 15
·期 6
·1-12
·
IF 4.357
Meng Fanling,Xia Yunxue,Zhang Jianshuai,Qiu Dong,Chu Yaozhu,Tang Yuanyuan
Chromium slag usually contains various heavy metals, making its safe treatment difficult. Glass-ceramic sintering has been applied to resolve this issue and emerged as an effective method for metal immobilization by incorporating heavy metals into stable crystal structures. Currently, there is limited knowledge about the reaction pathways adopted by multiple heavy metals and the co-stabilization functions of the crystal structure. To study the Cu/Cr co-stabilization mechanisms during thermal treatment, a simulated system was prepared using a mixture with a molar ratio of Al 2 O 3 :Fe 2 O 3 :Cr 2 O 3 : CuO = 1:1:1:3. The samples were sintered at temperatures 600–1300°C followed by intensive analysis of phase constitutions and microstructure development. A spinel phase (CuFe x Al y Cr 2− x − y O 4 ) started to generate at 700°C and the incorporation of Cu/Cr into the spinel largely complete at 900°C, although the spinel peak intensity continued increasing slightly at temperatures above 900°C. Fe 2 O 3 /Cr 2 O 3 was more easily incorporated into the spinel at lower temperatures, while more Al 2 O 3 was gradually incorporated into the spinel at higher temperatures. Additionally, sintered sample microstructures became more condensed and smoother with increased sintering temperature. Cu / Cr leachability substantially decreased after Cu/Cr incorporation into the spinel phase at elevated temperatures. At 600°C, the leached ratios for Cu and Cr were 6.28% and 0.65%, respectively. When sintering temperature was increased to 1300°C, the leached ratios for all metal components in the system were below 0.2%. This study proposes a sustainable method for managing Cu/Cr co-exist slag at reasonable temperatures.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2019
·Vol. 30
·期 5
·988-996
·
IF 1.335
Wang Cheng-ya,Shang Shanzhai,Zheng Xudong,Lei Ping,Han Jingmei,Yuan Linda,Li Zhiqiang,Wang Ru,Gong Weimin,Tang Jianguo,Yang Yaling
In this paper, Cu-doped carbon quantum dots (Cu-CQDs) were prepared by carrying out thermolysis of Na2[Cu(EDTA)] and hydroxylamine hydrochloride at 300 ºC for 2 h. The as-prepared Cu-CQDs were characterized by UV-Vis, Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The Cu-CQDs exhibited good fluorescence property, high stability, excitation-dependent emission behavior and a quantum yield of 9.8%. More significantly, the synthesized Cu-CQDs were developed for sensing rutin (RT) based on the fluorescence quenching of the prepared Cu-CQDs. A good linear relationship between the fluorescence quenching of Cu-CQDs and different concentrations of RT was obtained in the range of 0.1-15 µg mL-1 with a correlation coefficient of 0.9959. The detection limit was as low as 0.05 µg mL-1 (signal-to-noise ratio, S/N = 3). The possible mechanism of fluorescence quenching was explored, which was proved to be inner filter effect. Importantly, the proposed method was successfully applied in the detection of RT tablet samples and with satisfactory results, showing the practical applications.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
IF 16.8
Jiaxin Jiang,Huicai Xie,Zhiwen Shen,Zhixing Ye,Junfeng Wang,Lei Zhang,Jianjian Gong,Zhaojun Mo,Jun Shen
EuTiO 3 -based materials (ETO) exhibit impressive magnetocaloric performance, but the low thermal conductivity restricts their practical applications. Therefore, enhancing the thermal conductivity of these materials is crucial to advance their applications in magnetic refrigeration technology. Herein, we present a novel approach to enhance the thermal conductivity of EuTiO 3 -based magnetocaloric materials by constructing continuous Cu networks. For this purpose, copper plating layers were deposited on the surface of EuTi 0.75 Al 0.125 Zr 0.125 O 3 (ETAZO) powders via electroless plating. The influences of plating temperature, pH value, and plating duration on the structure and morphology of the plated copper layer were investigated, obtaining the optimal process for electroless copper plating on ETAZO microspheres. The formation process of copper plating layers was investigated, revealing the mechanism of electroless copper plating. On this basis, continuous Cu networks were successfully constructed in a cold-pressed ETAZO/Cu composite. The high thermal conductivity of copper enables rapid heat conduction through Cu networks, thereby significantly enhancing the thermal conductivity of the composite. Encouragingly, the thermal conductivity of the composite reaches 2.18 W m −1 K −1 at 4.2 K, indicating an increase of 35 times compared to ETAZO (0.06 W m −1 K −1 ). Meanwhile, the maximum magnetic entropy change of the composite under the magnetic field change of 0‒1 T remains 15.6 J kg −1 K −1 , exhibiting impressive magnetocaloric performance. The combination of outstanding magnetocaloric effect and high thermal conductivity enables ETAZO/Cu composite to be a practical cryogenic magnetic refrigerant.
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产品关联
DOI
高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 3
·e01581
·
IF 3.9
Wuyang Xiao,Fuhe Le,Rui Sheng,Xue Yang,Xueying Cao,Wei Jia
Perovskites with tunable compositions and structures are desirable electrocatalysts for water electrolysis. However, achieving efficient hydrogen evolution reaction (HER) in alkaline media using perovskite-based catalysts remains a significant challenge. Herein, a Cu-doped La 0.5 Ba 0.5 CoO 3–δ perovskite was synthesized via a sol-gel method, which exhibits enhanced HER electrocatalytic activity through the construction of dual active sites. X-ray photoelectron spectroscopy (XPS) and x-ray absorption fine structure (XAFS) analyses reveal that Cu doping simultaneously induces the oxidation of Co and the formation of oxygen vacancies, establishing a synergistic charge compensation between the dual active sites. Specifically, oxygen vacancies promote water dissociation by enhancing adsorption, while high-valence Co species reduce charge transfer resistance, thereby facilitating electron transfer during HER. As a result, the optimized La 0.5 Ba 0.5 Co 0.8 Cu 0.2 O 3–δ (LBCC 0.2 ) achieves low overpotentials of 160 mV and 228 mV at current densities of 10 and 100 mA·cm −2 , respectively. Moreover, the catalyst demonstrates outstanding stability, maintaining 200 h for HER operation, outperforming commercial Pt/C. This study highlights the advantage of dual active sites in boosting the intrinsic electrochemical activity and underscores the potential of Cu-doped perovskites for efficient hydrogen production. Graphical A Cu-doped La 0.5 Ba 0.5 CoO 3-δ perovskite (LBCC 0.2 ) was synthesized using a sol–gel method for alkaline hydrogen evolution reaction (HER). The resulting dual active sites, comprising Co species and oxygen vacancies, collectively enhance the electrical conductivity and accelerate HER kinetics of LBCC 0.2 . This leads to a low overpotential of 160 mV at a current density of 10 mA·cm −2 and an excellent stability over 200 h.
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产品关联
DOI
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Xianglong Meng,Yanjiao Wang,Ruiping Deng,Soryong Chae,Chunzheng Wang,Girolamo Giordano,Zifeng Yan,Hailing Guo,Svetlana Mintova
A strategy for synthesizing bimetallic catalysts confined within zeolite frameworks, offering a promising approach for stabilizing metal species under harsh reaction conditions, is disclosed. A dual-stage synthesis strategy including alkali etching to open the channels of Silicalite-1 (S-1) zeolite, exposing internal hydroxyl defects that serve as anchoring sites for Cu and Zn species, is presented. This was followed by a dry-gel conversion encapsulation step to yield Cu-ZnO@S-1 catalyst. The competitive occupation of these sites by Cu and Zn facilitates the formation of high-density Cu-ZnO interfaces. Under reaction conditions of 3 MPa and 250 °C, the catalyst achieves a methanol selectivity above 99.2% and a space-time yield (STY) of 2.1 g gCu–1 h–1, nearly four times higher than that of copper-containing catalyst (Cu@S-1, 0.54 g gCu–1 h–1) and significantly outperforming the sample prepared by conventional impregnation (Cu-ZnO/S-1, 1.6 g gCu–1 h–1). The oxygen-deficient Cu-ZnO1–x sites at the Cu-ZnO interface are further demonstrated to serve as genuine active centers for methanol synthesis. The methanol formation reaction proceeds via the formate pathway, and the high density of Cu-ZnO1–x sites effectively lowers the activation barrier for the hydrogenation of *HCOO to *H2COO.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Dengji Zhu,Xinmeng Wu,Haiwei Han,Yiming Zhang,Jiawei Wu,Yi Ding,Lihua Yu,Junhua Xu,Bin Zuo
The investigation of friction response behavior and underlying mechanisms of modified implants in a simulated human tissue fluid environment is critical for assessing their in vivo service life. This study presents an in vitro evaluation of implant coatings through integrated experimental and simulation approaches. A series of ZrBN-Cu composite films were fabricated using non-equilibrium magnetron sputtering, and the composition, microstructure, mechanical properties, chemical stability, and tribological behavior in bovine serum albumin (BSA) solution were systematically characterized. The results reveal that the ZrBN-Cu films comprise fcc-ZrN, hcp-ZrB 2 , and fcc-Cu. With increasing Cu content, the hardness and elastic modulus initially increase and subsequently decrease, reaching peak values of 25.45 GPa and 274.99 GPa, respectively, at a Cu concentration of 1.1 at.%. Moreover, the ZrBN-Cu film with 1.1 at.% Cu demonstrates optimal electrochemical stability, exhibiting a corrosion current density of 1.6×10 -6 A/cm 2 and a corrosion potential of -0.04 V, indicative of superior chemical resistance. In BSA solution, the coefficient of friction gradually decreases and stabilizes at 0.11. The wear rate initially declines and then slightly increases with Cu content, reaching a minimum value of 2.1×10 -8 mm 3 N -1 m -1 at 1.1 at.% Cu. The lubrication and wear mechanisms of the ZrBN-Cu/BSA system were analyzed from lubrication state, adsorption behavior, and tribochemical reactions. The findings suggest that: (1)The ZrBN-Cu/BSA system operates under boundary lubrication conditions. (2)Cu incorporation facilitates the formation of a stable physical and chemical adsorption layer on the surface, while B enhances the structural integrity of this layer. (3)Cu exerts a catalytic effect, promoting the degradation of BSA molecules during friction and resulting in the formation of high-molecular-weight carbon-based compounds with lubricating properties.
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产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2021
·Vol. 29
·期 6
·1727-1741
·
IF 3.667
Peng Xilong,Li Yue,Liu Shuang,Jiang Tian,Chen Wenjin,Li Dan,Yuan Jiren,Xu Feigao
In this experiment, chitosan (CS), waste limestone and diammonium hydrogen phosphate were used as raw materials to synthesize HAp-coated-stone composites/CS by one-step blending method. Then, the prepared HAp-coated-stone composites/CS composite material was used to remove Cu (II) in the solution. The structure and microstructure of the composite were characterized by Fourier transform infrared spectroscopy, X-ray diffraction analysis, Scanning Electron Microscopy, Brunauer–Emmett–Teller and Thermogravimetric Analysis. The results showed that with the addition of CS, the overall thermal stability of the composite improved, while its specific surface area decreased. Moreover, the composite was a mesoporous material. HAp-coated-stone/CS composites with small amounts of CS (0.5%) can remarkably increase Cu (II) removal. The HAp-coated-limestone/CS-0.5% had better resistance to pH changes compared with HAp-coated-limestone. Under the initial concentration of 20 mg/L, the maximum adsorption capacity for Cu (II) adsorption by HAp-coated-limestone/CS-0.5% was about 130.75 mg/g at 40 °C. The equilibrium data and kinetic were well described by Freundlich models and pseudo-second-order, respectively. The possible mechanisms for Cu (II) adsorption onto HAp-coated-stone/CS composites surface have been proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Mingxuan Fu,Guyang Ning,Jiaxian Liu,Qi Zhang,Yuena Sun,Xinyu Fan,Haiyang Wang,Haijun Lu,Yufan Zhang,Huan Wang
What is essential to solving energy scarcity problems is that develop the high activity, durable and non-noble metal-based dual-functional electrocatalysts for hydrogen evolution reactions (HER) and oxygen evolution reactions (OER). In this work, a series of core-shell structure M@Fe–Cu-GR nanocubes (NCs) are prepared. In the prepared process, the bimetallic FeCu prussian blue analogues (PBA) is used as precursor, transition metals ions Co 2+ and Ni 2+ are introduced into the FeCu-PBA using the exchange of potassium ions with other metal ions , and then the FeCu-PBA are successfully loaded on the graphene oxide (GO) employed the attraction of opposite charges between polydiallyldimethylammonium chloride (PDDA) and GO. Electrochemical tests show that the Tafel slope of Co–Ni@Fe–Cu–GR NCs for HER and OER are 60 and 82 mV dec −1 , respectively, and Co–Ni@Fe–Cu–GR NCs shows excellent performance in long-term stability test.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 23
·11149-11157
·
IF 3.925
Haoran Pan,Yue Wang,Zhenjie Lu,Xinning Huang,Xingxing Chen
High-performance bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are arousing great interest aiming at efficient electrochemical splitting of water. Herein, we report a facile strategy to fabricate Co/Zn sulfide supported on Cu-foam (CoZn-S/Cu-F) as a free-standing electrode with high-performance for overall water splitting. In half-cell electrochemical systems, the overpotentials required to reach the current densities of ±10 mA cm−2 for the OER and HER are only 170 and 130 mV, respectively. After a long-term stability test running 20 000 cyclic voltammograms, the respective potential losses for the OER and HER are only 82 and 41 mV at ±50 mA cm−2. The constructed overall water splitting system driven by simulated solar energy also exhibits prominent performance with gas bubbles continuously generated at both electrodes. A cell voltage of only 1.58 V is required to reach the current densities of ±10 mA cm−2, surpassing the commercialized noble metal and state-of-the-art non-noble metal electrodes. The excellent performance for the overall water splitting is ascribed to the CoS nanoparticles covered with ZnS nanoflocs on the highly conductive Cu-foam, which allows close interfacial contact with the electrolyte, promotes mass and charge transfer, and facilitates desorption of the generated gas from the catalyst surface.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2013
·
IF 0.917
Hui LI,De-li XIAO,Hua HE,Rui LIN,Peng-li ZUO
Amino-functionalized magnetic nanoparticle (NH 2 -MNP) were prepared by a sol-gel approach. The adsorption behavior of Cu(II) ions on NH 2 -MNP was discussed systematically by batch experiments. The effects of initial Cu(II) ions concentration, time, pH and temperature were investigated. In kinetic studies, the pseudo-second-order model was successfully employed, and the pseudo-first-order model substantiated that Cu(II) adsorption on NH 2 -MNP was a diffusion-based process. Langmuir model and Dubinin-Radushkevich model ( R 2 >0.99) were more corresponded with the adsorption isotherm data of Cu(II) ions than Freundlich model. The adsorption capacity was increased with the increment of temperature and pH. NH 2 -MNP remains excellent Cu(II) recoveries after reusing five adsorption and desorption cycles, making NH 2 -MNP a promising candidate for repetitively removing heavy metal ions from environmental water samples. According to the results obtained from adsorption activation energy and thermodynamic studies, it can be inferred that the main adsorption mechanism between absorbent and Cu(II) ions is ion exchange-surface complexation.
研究领域:
环境化学
·
纳米材料
·
重金属去除
·
吸附科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Huilin Hou,Minghui Shang,Fengmei Gao,Lin Wang,Qiao Liu,Jinju Zheng,Zuobao Yang,Weiyou Yang
Development of novel hybrid photocatalysts with high efficiency and durability for photocatalytic hydrogen generation is highly desired but still remains a grand challenge currently. In the present work, we reported the exploration of ternary hybrid TiO2/CuO/Cu thoroughly mesoporous nanofibers via a foaming-assisted electrospinning technique. It is found that by adjusting the Cu contents in the solutions, the unitary (TiO2), binary (TiO2/CuO, TiO2/Cu), and ternary (TiO2/CuO/Cu) mesoporous products can be obtained, enabling the growth of TiO2/CuO/Cu ternary hybrids in a tailored manner. The photocatalytic behavior of the as-synthesized products as well as P25 was evaluated in terms of their hydrogen evolution efficiency for the photodecomposition water under Xe lamp irradiation. The results showed that the ternary TiO2/CuO/Cu thoroughly mesoporous nanofibers exhibit a robust stability and the most efficient photocatalytic H2 evolution with the highest release rate of ∼851.3 μmol g–1 h–1, which was profoundly enhanced for more than 3.5 times with respect to those of the pristine TiO2 counterparts and commercial P25, suggesting their promising applications in clean energy production.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
光催化
·
清洁能源
·
多孔材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）