MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2025
·
IF 7
Zhen Li,Xianhui Wang,Yan Liang,Jituo Liu
To achieve the optimal trade-off among strength, toughness and electrical conductivity, the CNTs-Mo/Cu composites with different architectural structures were fabricated by the combination of wet mixing, ball milling, spark plasma sintering (SPS) and hot rolling. The microstructure, mechanical properties and electrical conductivity of the CNTs-Mo/Cu composites were investigated, and the strengthening and toughening mechanisms were also explored based on the experimental results along with finite element simulation and first-principles. It is found that CNTs-Mo exhibits a dispersed distribution in the Cu matrix for the 0.05 wt%CNTs-Mo/Cu composite, whereas a discontinuous network structure occurs in the 0.10 wt%CNTs-Mo/Cu composite. At 0.15 wt%CNTs-Mo, the complete continuous network architecture presents in the 0.15 wt%CNTs-Mo/Cu composite. Moreover, the Mo 2 C modified on the surface of CNTs forms a semi-coherent interface with Cu, which facilitates the enhancement on the interfacial bonding between CNTs and Cu. The 0.15 wt%CNTs-Mo/Cu composite with continuous network structure displays the maximum tensile strength of 455.1 MPa, the largest elongation of 39.1 % and the optimum fracture toughness of 22.4 MPa m 1/2 , while an excellent electrical conductivity of 93.2 %IACS can also be achieved simultaneously. Furthermore, the finite element simulations reveals that the network structure suppresses stress concentration and hinders crack propagation, thereby promoting load transfer. The first-principles calculation demonstrates that Cu-Mo 2 C and Mo 2 C-CNT heterostructures display the higher absolute value of binding energy and more obvious charge transfer than the CNT-Cu heterostructure, suggesting that the incorporation of Mo 2 C plays a crucial role in improving the interfacial stability and interfacial bonding strength of CNTs-Cu. The simultaneous improvement on strength and toughness of the 0.15 wt%CNTs-Mo/Cu composite can be attributed to strong interfacial bonding, effective load transfer, as well as crack deflection and bridging effects stemmed from the CNTs.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jin Li,Yang Wang,Tianxing Wu,Xiujing Xing,Limin Li,Wei Xiong,Hao Li
Electrocatalytic reduction of nitrate for the synthesis of high-value chemical hydroxylamine (NH 2 OH) represents a sustainable pathway that combines the dual functions of green synthesis and wastewater treatment. However, the selective control of the process is extremely challenging, mainly due to the susceptibility of nitrate to over-reduction during the reaction, leading to uncontrolled conversion of the target product NH 2 OH to the thermodynamically stable product ammonia (NH 3 ). In this paper, the Cu-PDA MOF precursor was synthesized using the emulsion method, and ZIF-8 was introduced to form the structure of Cu-PDA@ZIF-8. Subsequently, the nitrogen-carbon-doped Cu-ZnO/N-C catalysts were formed by calcination under N 2 atmosphere. The synthesized catalyst effective improved NH 2 OH selectivity during nitrate reduction. The NH 2 OH yield and FE efficiency of Cu-ZnO/N-C reached 564.97 μmol h −1 mg cat −1 and 46.64 %, respectively, under neutral electrolyte conditions. Cu, as the main component of the catalyst, plays a dominant role in hydroxylamine by electrocatalytic nitrate reduction to promote the reaction in the stage of NO 3 – →*NH 2 OH. Zn, on the other hand, plays a key role in the phase *NH 2 OH → NH 2 OH, selectively generating the product NH 2 OH and blocking the excessive reduction of NH 2 OH to NH 3 . Additionally, this study achieved tandem catalytic selective generation of NH 2 OH at copper and zinc heterogeneous interfaces and offers a potential approach and reference for applications involving the nitrate reduction reaction.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Feng Tan,Zhiqiang Sun
Hydrogen production from methanol is a promising pathway for clean energy applications, particularly in hydrogen transportation, storage, and in situ supply. This study investigates the chemical looping oxidative steam reforming of methanol using lanthanum copper oxide as the catalytic oxygen carrier. The results indicate that the redox looping promotes the generation of hollow La 2 CuO 4 supported exsolved Cu. This material exhibits excellent redox properties and satisfactory catalytic activity. Specifically, the sol-gel synthesized lanthanum copper oxide achieves a hydrogen yield of 0.22 mmol min −1 at 240 °C under a steam/methanol mole ratio of 1.2 and a gas hourly space velocity of 4000 h −1 . The catalytic oxygen carrier possesses even promoted catalytic activity and outstanding long-term stability after 60th cycles, attributed to the in situ generation of highly dispersed Cu nanoparticles via redox looping on the lanthanum copper oxide substrate. This research demonstrates the potential of lanthanum copper oxide as a next-generation catalytic oxygen carrier, contributing to the advancement of sustainable hydrogen production technologies.
✓ 已验证
产品关联
DOI
高影响因子
Sustainability
·
2025
·Vol. 18
·期 1
·
IF 3.3
Runlai Luo,Nan Zhao,Zhengmiao Jia,Sihan Wu,Xing Chen,Zhongyuan Li,Feng Ju,Yongming Luo,Hui Li
The simultaneous stabilization of Cu, Ni, Pb, and As in sustainable environmental development remains a significant challenge in heavy metal remediation. In this paper, liquid phase equilibrium experiments have evaluated the immobilization efficiency of 20 potential stabilization materials. Soil stabilization experiments, material characterization, and long-term effectiveness assessments have been performed to investigate the efficient composite stabilization agent and its underlying mechanisms. Results demonstrate that seven materials, including calcium oxide (CaO) and hydroxyapatite (HAP), exhibit multi-metal immobilization capabilities. Among single-material stabilization in soil, HAP for Pb, zero-valent iron (ZVI) for As, and blast furnace slag (BFS) for Cu exhibit prominent stabilization efficiency, yet they cannot efficiently stabilize the four heavy metals simultaneously. Subsequently, the ZVI:BFS:CaO composite agent (6:3:1 mass ratio, 10% addition rate) has been proposed by formulation optimization, achieving remarkable stabilization rates: 99.92% for Cu, 96.16% for Ni, 92.06% for Pb, and 99.58% for As. XRD, XPS, and SEM-EDS analyses confirm that the stabilization occurs through synergistic mechanisms including precipitation, complexation, and lattice encapsulation. The composite stabilizing agent withstood 15 wet–dry and 150 freeze–thaw cycles, with four types of heavy metals stabilization rates > 60%, confirming its long-term effectiveness.
✓ 已验证
产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2023
·Vol. 87
·期 5
·1202-1213
·
IF 2.7
Liu Zhenzhong,Wu Yang,Wan Siwen,Wang Boyan,Ji Hongliang,Xiang Xiaofang
View large Download slide View large Download slide Close modal Compared with the common synthesis methods of metal-organic frameworks (MOFs), Co/Cu-based bi-MOFs composite catalyst Co X Cu (10− X ) -MOFs ( X = 2, 4, 6, and 8) was prepared by a facile synthesis method at room temperature. The bi-MOFs composite catalyst was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The removal ability of sulfamethoxazole (SMX) by different Co:Cu rate bi-MOFs composite catalysts, single Co-based MOFs (zeolitic imidazolate framework-67, ZIF-67), and Cu-based MOFs (Hong Kong University of Science and Technology-1, HKUST-1) were investigated and the effects of peracetic acid (PAA) concentration, catalyst dosage, the common interfering substances (Cl − , HCO 3 − , SO 4 2− , HA) in water, and SMX removal were investigated. Through the analysis of different free radical scavengers and the changes of surface elements before and after the reaction, the oxidation mechanism was further explored, and the stability of Co 4 Cu 6 -MOFs was explored through repeated recycling. The experimental results demonstrate that Co 4 Cu 6 -MOFs have a high catalytic activity for PAA. Co 4 Cu 6 -MOFs/PAA show the best removal effect of SMX under neutral conditions and the presence of Cl − and HCO 3 - can promote the removal of SMX. Co 4 Cu 6 -MOF composites were synthesized and used for SMX removal. Application of PAA activation catalyst to generate R–O• for SMX removal. The effects of different environmental factors on the removal of SMX were discussed.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hongjing Wang,Yanan Guo,Chunjie Li,Hongjie Yu,Kai Deng,Ziqiang Wang,Xiaonian Li,You Xu,Liang Wang
The artificial ammonia synthesis via electrochemical nitrate reduction has met increasing research interest, but it is still necessary to develop advanced catalysts with high nitrate-to-ammonia capability. Herein, we propose and demonstrate a one-step method to construct binder-free Cu foam-supported oxygen vacancy-rich Cu/CuOx in-plane heterostructured nanosheet arrays (Cu/CuOx/CF). In addition to exposing ample active sites, the two-dimensional nanosheet morphology greatly facilitates the mass/charge-transfer process during electrocatalysis. Besides, the in-plane heterojunctions and rich oxygen vacancies induced synergistic effect can modulate the electronic structure of active sites and thus tune the adsorption properties of the reactant intermediates and inhibit the formation of undesirable byproducts, which is conducive to the further improvement of nitrate reduction activity. As a result, these advantages endow the Cu/CuOx/CF with superior performance for ammonia synthesis via nitrate electroreduction, achieving high ammonia selectivity (95.00%) and Faradaic efficiency (93.58%).
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 33
·期 2
·025501
·
IF 3.874
Ruyan Xie,Nannan Zhang,Yaoyao Qu,Mingyu Tang,Fang Zhang,Fang Chai,Zhongmin Su
Herein, we have reported a facile one-pot strategy to synthesize fluorescent Cu nanclusters (Cu NCs) by using ʟ-histidine as stabilizer, and ascorbic acid as reducing agent. Cu NCs are stable, water-dispersible, and emit bright cyan emission with a quantum yield 26.08%. The Cu NCs can be employed as colorimetric and fluorimetric dual-mode detector, exhibiting excellent selectivity and sensitivity for detecting 2,4-dinitrophenol (DNP) specifically. Notably, Cu NCs were a sensitive sensor, which had speciality to detect DNP in range of linearity from 0.01 to 0.15 mM with a discernable limit as low as 3.96 μM. The mechanism of efficiently selective detection of DNP by Cu NCs was analyzed by UV absorption, fluorescence decay spectrum, and the performance of 'turn off' towards DNP was determined as the inner filter effect and static quenching effect. Further, the environmental tolerance of the Cu NCs probe was estimated by using the different natural water samples, demonstrating its great promise in the field of DNP monitoring and water sample analysis.
✓ 已验证
DOI
高影响因子
Progress in Natural Science-Materials International
·
2021
·
IF 3.607
Jiaojiao Zheng,Bing Bai,Qiumei Di,Zhuoli Jiang,Meng Xu,Jiatao Zhang
In II-VI group, the doping in CdTe nanocrystals (NCs) is more difficult than other chalcogenides. In this communication, CdTe nanocrystals containing Cu impurities were carefully synthesized based on controlled reverse cation exchange process between as-prepared Cu 7 Te 5 nanocubes and Cd 2+ ions. By well-defined Cu 7 Te 5 nanocubes, the obtained CdTe NCs kept the original morphology. The concentration of Cu impurities in CdTe NCs was controlled by the regulation such reverse cation exchange. Additionally, the regulation from band gap (BG) photoluminescence (PL) to the coexistence of the bandgap emission, dopant emission, and surface-state emission was realized. This tailoring from undoped to doped emission in the case of Cu impurities is helpful to study the Cu related doping in telluride NCs.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Jinpeng Wang,Ming Zhang,Runjuan Zhou,Jiyuan Li,Wei Zhao,Wenyuan Chen
This paper explored the effect of trace Cu(Ⅱ) (5 μM) on the degradation of Orange Ⅱ by Fe(Ⅱ)/Hydroxylamine (HA)/Persulfate (PS) system. The results showed that the addition of trace Cu(Ⅱ) not only improved the degradation efficiency of Fe(Ⅱ)/HA/PS system, but also broadened the pH range of Fe(Ⅱ)/HA/PS degradation Orange Ⅱ (2–10). Increasing the dosage of Fe(Ⅱ), Cu(Ⅱ) and PS will promote the degradation of Orange Ⅱ by the Cu(Ⅱ)/Fe(Ⅱ)/HA/PS system. However, the optimal dosage of HA is 0.03 mM. Lower or excessive HA dosage is not conducive to the degradation of Orange Ⅱ by the Cu(Ⅱ)/Fe(Ⅱ)/HA/PS system. Scavenger experiments show that SO 4 ·- is the main reactive oxygen species (ROS) in the Cu(Ⅱ)/Fe(Ⅱ)/HA/PS system. In both acidic and alkaline environments, Cu(Ⅰ) reduced by hydroxylamine can promote the conversion of Fe(Ⅲ) to Fe(Ⅱ). In acidic environment, Fe(Ⅱ) reduced by Cu(Ⅰ) is the reason why trace Cu(Ⅱ) can enhance the efficiency of Fe(Ⅱ)/HA/PS system to degrade Orange Ⅱ. However, in alkaline environment, Cu(I) reduced by hydroxylamine is the main participant in the production of SO 4 ·- by activating persulfate, which is also the main reason for broadening the applicable pH of Fe(Ⅱ)/HA/PS for Orange Ⅱ degradation to alkaline environment.
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 1
·015602
·
IF 1.151
Hu Wang,Zhao-Hui Zhang,Zheng-Yang Hu,Qi Song,Shi-Pan Yin
In this paper, we fabricated a novel copper matrix composites reinforced by carbon nanotubes (CNTs) using electroless deposition (ED) and spark plasma sintering technique. Microstructure, mechanical, electric conductivity, and thermal properties of the CNTs/Cu composites were investigated. The results show that a favorable interface containing C–O and O–Cu bond was formed between CNTs and matrix when the CNTs were coated with nano-Cu by ED method. Thus, we accomplished the uniformly dispersed CNTs in the CNTs/Cu powders and compacted composites, which eventually leads to the enhancement of the mechanical properties of the CNTs/Cu composites in the macro-scale environment. However, the interface structure can hinder the movement of carriers and free electrons and increase the interface thermal resistance, which leads to modest decrease of electrical and thermal conductivity of the CNTs/Cu composites.
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Bin Guan,Junyan Chen,Zhongqi Zhuang,Lei Zhu,Zeren Ma,Xuehan Hu,Chenyu Zhu,Sikai Zhao,Kaiyou Shu,Hongtao Dang,Zhen Huang
As a significant technology of CO2 utilization, artificial CO2 photoreduction has received more and more attention. Herein, g-C3N4 catalysts modified with Bi and/or Cu for CO2 photothermal reduction were prepared by solvothermal synthesis and impregnation methods. Performance evaluation and physicochemical and photo- and thermochemical characterization indicated that Bi and Cu modification effectively enhanced the photo-absorption properties of g-C3N4 catalysts, improving charge transfer efficiency and catalytic performance. Compared with single-metal modification, Bi and Cu co-modification showed a narrower bandgap and more excellent light and CO2 absorption capacity, suggesting a certain synergistic effect of Bi and Cu co-modification. The alteration of the light absorption properties may be related to the surface plasmon effect of Bi and Cu, and the co-loading of Bi and Cu can exacerbate the effect, which can effectively enhance the photoresponsivity of the catalysts, leading to higher catalytic performance.
✓ 已验证
DOI
高影响因子
Carbon Letters
·
2023
·Vol. 33
·期 5
·1395-1406
·
IF 4.5
Chen Zhangjing,Li Liangliang,Cheng Gang
Photocatalytic CO 2 reduction is a promising approach for reducing CO 2 emissions and achieving the goal of carbon neutrality. In this work, selectively coupling Cu(OH) 2 and CuO with amine-modified brookite TiO 2 (NH 2 –B–TiO 2 ) has been achieved by a simple precipitation method. The results show that CuO is better than Cu(OH) 2 as a co-catalyst to enhance the CO 2 photoreduction capability of NH 2 –B–TiO 2 . The highest rates of CO 2 conversion to CH 4 and CO of NH 2 –B–TiO 2 –CuO composite reach 6.05 and 3.25 μmol h −1 g −1 , respectively, which is higher than 8 times the yield of CH 4 of NH 2 –B–TiO 2 . It is proposed that the NH 2 –B–TiO 2 –CuO composite offers an effective charge transfer through the formation of a p–n junction between NH 2 –B–TiO 2 and CuO interfaces, while in the NH 2 –B–TiO 2 –Cu(OH) 2 composite, the Cu(OH) 2 dominantly serves as an electron sink to capture photo-induced electrons, promoting photo-induced carrier separation. This work provides an ingenious synthetic method for selectively anchoring Cu(OH) 2 and CuO on semiconductors with different charge transfer routes for an efficient CO 2 photoreduction. Graphical abstract
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）