Journal of Biobased Materials and Bioenergy
·
2014
·Vol. 8
·期 6
·610-617
·
IF 0.586
Zhang Min,Ding Cuicui,Chen Lihui,Huang Liulian,Yang Haiyang
Collagen/cellulose bead was prepared by the reconstitution of collagen and cellulose (collagen/cellulose mass ratio = 1/6) from 1-ethyl-3-methylimidazolium acetate. Based on this, a novel bio-adsorbent, bayberry tannin immobilized collagen/cellulose (BT-CC) bead, was obtained via the
reaction of collagen with bayberry tannin. The adsorption properties of BT-CC to Cu(II) in aqueous solution were investigated. Results from SEM and XRD indicated the well preservation of structure after the adsorption of Cu(II). Furthermore, the maximum decomposition temperature of BT-CC after
the adsorption of Cu(II) was even increased for ∼7 °C, confirming the stability of BT-CC. The adsorption of Cu(II) on BT-CC displayed pH-dependence and the maximum adsorption was obtained at pH = 5.0. Based on the mass content of collagen, the maximum adsorption capacity of BT-CC was
0.73, 0.96 and 1.12 mmol/g at 298, 308 and 318 K, respectively, according to the experimental adsorption isotherms. In kinetics studies, the adsorption equilibrium at both of 298 and 318 K reached within ∼300 min, and the experimental data could be well fitted by the pseudo-first-order
rate model. Furthermore, good adsorption properties of BT-CC remained after three cycles of adsorption–desorption. These results indicated that high stability, great adsorption capacity and good reusability of BT-CC as the adsorbent to Cu(II) could be obtained.
研究领域:
环境科学
·
生物材料学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 7
·077510
·
IF 4.386
Tao Zhan,Xiao-Zhen Feng,Yun-Yun Cheng,Guo-Cheng Han,Zhencheng Chen,Heinz-Bernhard Kraatz
Folic acid (FA) plays an indispensable role in human body and sometimes needs to be taken as a drug supplement, especially for pregnant women. Herein, an electrochemical FA sensor was constructed by electrodepositing Cu and ferrocene carboxylic acid (Fc(COOH)) on a glassy carbon electrode (GCE), indicating low cost, simple preparation and short time consumption. Furthermore, the field emission scanning electron microscopy illustrates that Fc(COOH) completely covering Cu nanoparticles (CuNPs) grew to be tufts of loose and porous nanoflowers in situ, which produces a large active surface area to adsorb FA. Results verify that two conjected materials exhibited a good synergistic amplification effect on FA signal. Ultimately, a great linear relationship of FA was established between 100.0 ∼ 1000.0 μM under optimized conditions by differential pulse voltammetry (DPV). The limit of detection was 33.3 μM, and the sensitivity was 0.10149 μA·μM−1·cm−2. The sensor Fc(COOH)/CuNPs/GCE showed satisfactory selectivity and stability and could be used for FA detection in FA tablets samples with an average recovery of 91.43 ∼ 100.68%, and a relative standard deviation less than 3.17%. The consistency and validity were affirmed by comparisons with an ultra-visible spectrophotometer.
研究领域:
分析化学
·
生物医学工程
·
材料科学
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Xiaoying Lu,Fang Deng,Min Liu,Xubiao Luo,Aijie Wang
CuInS 2 semiconductor were synthesized by regulating Cu/In molar ratio via a hot solvent method. Different Cu/In molar ratio in reaction system had significant influence on the BET surface area , charge separation and photocatalytic activity of CuInS 2 . The CuInS 2 with optimal Cu/In ratio of 1:1.5 exhibits the most efficient charge separation and transfer, leading to the highest photocatalytic activity . The mineralization efficiency of pharmaceutical wastewater by CuInS 2 (Cu:In = 1:1.5) was 67.5% in 6 h, and CuInS 2 (Cu:In = 1:1.5) exhibited high stability, indicating that CuInS 2 has a promising prospect in real pharmaceutical wastewater treatment .
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Jianli Liang,Qianqian Song,Jing Lin,Gen Li,Yi Fang,Zhonglu Guo,Yang Huang,Chun-Sing Lee,Chengchun Tang
Porous boron nitride (BN) materials have been considered as a promising material for CO2 capture and storage. It was found that the Cu2+ ion can modify the nucleation mechanism during the synthetic reaction between boric acid and melamine leading to the formation of Cu-loaded BN nanofibers with uniform and smaller diameter. Interestingly, the introduction of Cu was found to dramatically enhance the CO2 adsorption capacity of the BN nanofibers from 1.34 to 2.77 mmol g–1 (at 1 bar, 273 K). The Cu-loaded BN nanofiber not only shows a CO2 adsorption capacity comparable to those of state-of-the-art BN-based CO2 absorbents but also shows unprecedented high recyclability for repeated uses. The mechanisms of the copper-induced CO2 adsorption capacity enhancement were investigated with density-functional theory calculations. It was found that the incorporation of Cu can change the electron transfer between porous BN and CO2 to promote the affinity and adsorption capacity of CO2.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Surface Topography-Metrology and Properties
·
2020
·Vol. 8
·期 3
·035014
·
IF 1.613
Weiwei Zhang,Cuicui Ji,Qiang Fu,Zhongquan Shi
In this work, the structure and properties of ZrO2 nanoparticle reinforced Ni–W, Ni–B and Ni–Cu matrix nanocomposite coatings were comparatively studied. Their surface morphology, composition, microstructure, topography, hardness, wear and corrosion resistance were examined by various methods . The nanocomposites exhibit dense, nodular-like morphology with nanocrystalline structure. The results show that the ZrO2 particles have homogeneously dispersed in the nanocomposites. The formation of the protrusion structure was partly attributed to the heterogeneous distribution of the electric field. The presence of ZrO2 nanoparticles could refine the crystallite size of the Ni–W, Ni–B and Ni–Cu alloy matrix to 12.5 ± 1, 10.5 ± 0.5 and 15 ± 0.1 nm, respectively. The corrosion resistance of these nanocomposites can be improved by the incorporation of ZrO2 nanoparticles into the alloy matrix. The Ra of Ni–W/ZrO2, Ni–B/ZrO2 and Ni–Cu/ZrO2 nanocomposites are about 53 ± 3, 69 ± 2, 18 ± 1 nm, respectively, expressing the rougher surface of Ni–B/ZrO2 compared to the others. It indicated that the composition of these alloy matrix have different crystallite size, which could affect the surface roughness of the electrodeposits. The inclusion of ZrO2 particles in Ni-based alloys could enhance its properties. The reinforcement effect of the anti-wear properties of the nanocomposites was proposed. The Rct value of the Ni–W–ZrO2, Ni–B–ZrO2, Ni–Cu–ZrO2 were 50.93, 105.18, 44.67 kΩ · cm2, respectively, indicating that the Ni–B–ZrO2 nanocomposite coating has the highest corrosion resistance. The Rct values depends on not only the composition of the coatings, but also the electrodeposition conditions, which influence the crystallize size and compactness of the electrodeposits. The order of the microhardness and anti-wear properties is Ni–W–ZrO2 > Ni–B–ZrO2 > Ni–Cu–ZrO2.
研究领域:
材料科学
·
表面工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Liang Yan,Weiwei Men,Yujing Zhang,Yanqi Wu,Xuan Yang,Yilin Zhang,Chuyang Liu,Jun Liu,Feng Xu
To address the challenges of impedance mismatch and limited absorption bandwidth in ferrite-based microwave absorbers, a one-step oxygen-deficient sintering process was employed to fabricate Zn 0.35 Ni 0.65 Fe 2 O 4 /Ni-Cu multiphase composites. This approach effectively regulates Cu 2+ substitution for Ni 2+ /Zn 2+ in the ferrite lattice while modifying the Ostwald ripening process, synergistically enhancing dielectric and magnetic losses. The pure Zn 0.35 Ni 0.65 Fe 2 O 4 exhibits a broad low-frequency absorption of 5.6 GHz (3.4–9.0 GHz, covering the entire C-band). Notably, the Zn 0.35 Ni 0.65 Fe 2 O 4 /Ni-Cu composite achieves a remarkable minimum reflection loss (RL min ) of −35 dB along with an effective absorption bandwidth (EAB) of 4.7 GHz. Consequently, this work provides both a facile synthesis methodology and mechanistic insights for designing high-performance electromagnetic materials with multiband operability.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yan Liu,Yamin Zheng,Panpan Dong,Wenzhuang Zhang,Wenjie Wu,Junjie Mao
Development of high-performance heterogeneous catalytic materials is important for the rapid upgrade of chemicals, which remains a challenge. Here, the benzene oxidation reaction was used to demonstrate the effectiveness of the atomic interface strategy to improve catalytic performance. The developed B,N-cocoordinated Cu single atoms anchored on carbon nanosheets (Cu1/B–N) with the Cu–N2B1 atomic interface was prepared by the pyrolysis of a precoordinated Cu precursor. Benefiting from the unique atomic Cu–N2B1 interfacial structure, the designed Cu1/B–N exhibited considerable activity in the oxidation of benzene, which was much higher than Cu1/N–C, Cu NPs/N–C, and N–C catalysts. A theoretical study showed that the enhanced catalytic performance resulted from the optimized adsorption of intermediates, which originated from the manipulation of the electronic structure of Cu single atoms induced by B atom coordination in the Cu–N2B1 atomic interface. This study provides an innovative approach for the rational design of high-performance heterogeneous catalytic materials at the atomic level.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiangfu Meng,Guoxing Pan,Hongji Liu,Yong Qian,Xingyu Wang,Changlai Wang,Lin Hu,Hui Wang,Qianwang Chen
The electroreduction of carbon dioxide (CO2) to a liquid product is a viable method for establishing an artificial carbon cycle. Unfortunately, most electrocatalysts’ low efficiency and instability prevent them from being used in practical applications. In the current study, we developed ultrasmall Cu nanocrystals embedded in nitrogen-doped carbon nanosheets (Cu/NC-NSs) for selective CO2 electroreduction by adjusting the potential. Cu/NC-NSs had 43.7 and 63.5% Faradaic efficiencies for the synthesis of ethanol and formate with applied potentials of −0.37 and −0.77 V vs reversible hydrogen electrode (RHE) using a flow cell architecture, respectively. Moreover, these Cu/NC-NSs show a steady catalytic performance up to 16 h. Density functional theory (DFT) calculations were performed to investigate the reaction mechanism. Furthermore, the synergistic effect formed by nitrogen-doped carbon and highly dispersed copper atoms led to their excellent performance in CO2 electroreduction.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Qixia Dong,Haoran Dong,Yangju Li,Junyang Xiao,Shuxue Xiang,Xiuzhen Hou,Dongdong Chu
In this work, zero-valent Fe-Cu bimetallic nanoparticles were synthesized using a facile method, and applied to activate sulfite for the degradation of sulfamethazine (SMT) from the aqueous solution. The key factors influencing SMT degradation were investigated, namely the theoretical loading of Cu, Fe-Cu catalyst dosage, sulfite concentration and initial solution pH. The experimental results showed that the Fe-Cu/sulfite system exhibited a much better performance in SMT degradation than the bare Fe 0 /sulfite system. The mechanism and possible degradation pathway of SMT in Fe-Cu/sulfite system were revealed. The reactive radicals that played a dominant role in the SMT degradation process were •OH and SO 4 •- , while the loading of Cu induced the synergistic effect between Fe and Cu. The redox cycle between Cu(I)/Cu(II) remarkably contributed to the conversion of Fe(III) to Fe(II), greatly enhancing the catalytic performance of Fe-Cu bimetal. In real groundwater applications, the Fe-Cu/sulfite system also exhibited satisfactory SMT degradation. The 30-day aging tests of Fe-Cu particles demonstrated that the aging of catalyst was not obviously affecting the removal of SMT. Furthermore, the reusability of catalyst was evidenced by the recycling experiments. This study provides a promising application of bimetal activated sulfite for enhanced contaminant degradation in groundwater.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
·
2019
·Vol. 50
·期 10
·4827-4838
·
IF 1.985
Liu Jun-Kai,Zhang Guo-Hua,Sun Guo-Dong
We propose a process to produce ultrafine W-10 wt pct Cu composite powders by reducing the mixtures of copper tungstate (CuWO 4 ) and tungsten trioxide (WO 3 ) (from the calcination of a mixture of ammonium paratungstate and copper nitrate trihydrate) with carbon black and hydrogen. First, ultrafine pre-reduced tungsten-copper (W-Cu) powders containing a small amount of WO 2 were produced by reducing mixtures of CuWO 4 and WO 3 with insufficient carbon black; then the obtained products were further reduced by hydrogen to remove the residual oxygen. This method provides a simple and low-cost route to prepare ultrafine W-10 wt pct Cu composite powders. The composite powders were sintered at different temperatures [1323 K (1050 °C), 1373 K (1100 °C), 1423 K (1150 °C), 1473 K (1200 °C), and 1523 K (1250 °C)] for 3 hours. A maximum densification of the obtained compact was achieved at a sintering temperature of 1523 K (1250 °C), with a relative density, Vickers hardness and thermal conductivity of the W-10 wt pct Cu composites of 97.8 pct, 365 HV and 165 W/m K, respectively.
研究领域:
材料科学
·
冶金工程
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DOI
高影响因子
Journal of Central South University
·
2024
·Vol. 30
·期 12
·3881-3896
·
IF 3.7
Ma Xin,Duan Guang-yu,Huang Jia-qi,Yang Jia,Cao Zhan-fang,Wang Shuai
Heavy metal-contaminated water has become a great challenge for aquatic ecosystems. Herein, a versatile composite (IRC 748-GO) adsorbent was prepared by modifying graphene oxide (GO) with Amberlite IRC 748 resin. The batch and dynamic adsorption experiments of Cu 2+ on the IRC 748-GO composite were conducted, and the results showed that the novel adsorbents have a high adsorption capacity compared to the pristine GO. The adsorption process was consistent with the pseudo-second-order kinetic model and the equilibrium data were well fitted to the Langmuir isotherm model, and the maximum uptake of Cu 2+ was 127.22 mg/g. The adsorption mechanism was investigated using FT-IR, SEM, XPS, and adsorption isotherms, which revealed that the carboxyl groups in IRC 748-GO composite could effectively chelate Cu 2+ . Overall, the IRC 748-GO composite exhibited important advantages such as great specific surface area and stability, as well as high adsorption capacity, which provides broad application prospects for efficiently remediating wastewater containing heavy metals.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yu Cao,Luona Wang,Chengyin Wang,Xiaoya Hu,Yunling Liu,Guoxiu Wang
A photoelectrochemical (PEC) sensor based on hierarchically porous Cu-BTC/g-C 3 N 4 nanosheet (Cu-BTC/CN-NS, BTC = benzene-1,3,5-tricarboxylic acid) material was constructed for the first time. As a composite material, the hierarchically porous Cu-BTC can help to efficiently capture suitable pesticide molecules and accelerate signal transmission, while CN-NS possesses good optical performance. Under the irradiation of visible light, the Cu metal center can coordinate with the added glyphosate to form Cu-glyphosate complexes, leading to the increased steric hindrance of electron transfer and consequently resulted in an obvious decrease in photocurrent . Through this strategy, the constructed sensor can realize the detection of glyphosate from non-electroactive to electroactive. The results indicate that this photoelectrochemical sensor has a low detection limit of 1.3 × 10 −13 mol L −1 and a wide detection range (1.0 × 10 −12 –1.0 × 10 −8 mol L −1 and 1.0 × 10 −8 ∼ 1.0 × 10 −3 mol L −1 ). Furthermore, this Cu-BTC/CN-NS based sensor has the characteristics of short detection time and easy operation. It has great potential applications in photoelectrochemical analysis.
研究领域:
分析化学
·
环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）