SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
·
IF 6.3
Le Huy Thai,Le Thi Thanh Nhi,Nguyen Minh Hiep,Dinh Thanh Khan,Trinh Ngoc Dat,Le Vu Truong Son,Truong Quang Trung,Le Hoang Sinh
A novel all-in-one electrochromic device from viologen-based Cu-MOF was demonstrated successfully for the first time. The viologen-based Cu-MOF was dispersed in a photochemical eutectic solvent and directly used as an electrochromic material with the outstanding advantage of good modulation ability in a wide range of visible light. The electrochromic device's (ECD) color changed from transparent and light lime green to blue during the change of potential from 0 V to −3.5 V. The bistability of the ECD was demonstrated by the transmittance degradation of less than 10 % over 1.79 h when the power was turned off. This showed that the ECD could maintain its optical state long without a continuous power supply.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 34
·1-9
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IF 2.8
Gao Dawei,Ma Juncheng,Zhang Jiafen,Shi Qingang,Xiong Zhe,Zhang Xing,Tang Bin
The occurrence of "dark holes" is a common phenomenon in TiO 2 -based ceramics, resulting from the reduction of Ti 4+ under high-temperature and low-oxygen partial pressure sintering conditions. To achieve low dielectric loss, Ca 0.61 Nd 0.26 Ti 1- x Cu x O 3 ceramics were designed and prepared in this work. The results indicate that moderate doping of CuO not only enhances insulation resistivity and Q × f value but also reduces the positive τ f value. The Ca 0.61 Nd 0.26 Ti 0.98 Cu 0.02 O 3 sample exhibited the highest Q × f value of 16,895 GHz, contributing to the miniaturization and insertion loss of microwave devices.
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RSC Advances
·
2017
·Vol. 7
·期 60
·37823-37829
·
IF 3.108
Jinglei Liu,Yiqun Zheng,Shifeng Hou
We report a facile synthesis of copper/nickel (Cu/Ni) alloy nanospheres in high purity and with tunable, well-controlled sizes and elemental ratios. The success of this synthesis relies on the use of one-pot, direct thermal reduction of a Cu and Ni precursor mixture in the presence of trioctylphosphine (TOP) and oleylamine (OAm) at an elevated temperature to form Cu/Ni alloy nanoparticles with a spherical shape and uniform size. Their sizes could be readily tuned in the range of 6.9–27.3 nm by simply varying the volume of TOP added to the reaction solution. The elemental ratio of Cu to Ni in resultant products was found to remain the same as that in the precursor, which offers a simple way to manipulate the composition of Cu/Ni alloy nanospheres. We also tested the catalytic performance of as-prepared Cu/Ni alloy nanospheres and evaluate the effect of size and elemental ratio using the reduction of 4-nitrophenol as the model reaction. The current strategy enables the size and composition controlled synthesis of Cu/Ni alloy nanomaterials and could find important use in the fabrication of other types of bimetallic alloy nanomaterials with desired sizes and compositions for catalytic purposes.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
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IF 8
Longfei Zhang,Ping Wang,Xiqing Wang,Qi Zhang,Yunpu Wang,Yuhuan Liu,Lantian Zhao,Roger Ruan,Xian Cui
Contamination of heavy metals has always been a pressing concern. The dry-wet alternately treated carboxymethylcellulose bentonite (DW-CB) was successfully prepared by intercalating bentonite (BT) with carboxymethyl cellulose (CMC) obtained by solvent processes using enzymatically digested wastepaper as cellulosic raw material, and the adsorption capacity of Cu 2+ on DW-CB in aqueous solution was investigated. A 98.18 ± 2.31 % removal efficiency was achieved by 4 g/L of DW-CB after 8 h in a solution containing 100 mg/L of Cu 2+ , which were 4.1 times and 1.5 times of that of BT and adsorbent prepared without alternating dry-wet process, respectively. The introduction of –COOH groups during the preparation of DW-CB enhanced the electrostatic interaction between DW-CB and Cu 2+ , which was the main driving force for Cu 2+ removal. The pseudo-first-order kinetic model and Langmuir model better described the adsorption process and adsorption capacity of Cu 2+ on DW-CB. DW-CB still showed high removal of Cu 2+ (19.61 ± 0.99 mg/g) in the presence of multiple metal ions , while exhibiting the potential for removal of Zn 2+ , Mg 2+ and K + , especially Mg 2+ (22.69 ± 1.48 mg/g). However, the interactions of organics with Cu 2+ severely affected the removal of Cu 2+ by DW-CB (removal efficiency: 17.90 ± 4.17 % - 95.33 ± 0.27 %). In this study, an adsorbent with high targeted adsorption of Cu 2+ was prepared by utilizing wastepaper and BT, which broadened the way of wastepaper resource utilization and had good economic and social benefits .
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PubMed
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengchen Wu,Yang Yang,Jing Zhao,Rui Liu
In CO 2 electroreduction, mutative intermediates and the challenging C C coupling necessitate the spatial interplay between active sites and through dynamically optimizing configurations. Herein, we anchor ethylenediaminetetraacetic acid (EDTA)-bonded Cu x+ /Bi 3+ pair within UiO-66 for a spontaneous spatial-optimizing CO 2 -to-C 2 H 4 electroreduction. Ab initio molecular dynamic (AIMD) simulation visualizes that such metal pair adaptively interacts with intermediates. Density functional theory (DFT) elicits the componential synergy, in which an upshift d-band of Cu activates CO 2 being protonated into *COOH while Bi site stabilizes oxygenated dimers for deep hydrogenation. The dynamic feature of such pair affords large freedom for sorption and migration of various intermediates, which consequently bestows UiO-66-EDTA/CuBi a maximal FE C 2 H 4 of 47 % and a total current density over 100 mA cm −2 in the flow cell.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yuanzheng Zhang,Chao Liang,Kaihang Zhang,Yuxin Zeng,Yufei Zhou,Xiaoxia Zhang,Lifeng Yin,John Crittenden,Junfeng Niu
The persistent challenge of nitrate (NO 3 – ) pollution in water systems, profoundly impacting ecosystems and human health, demands effective remediation strategies. Here, we present an innovative S-scheme Cu@CN/TiO x heterojunction for high-efficiency photocatalytic denitrification (PCDN). Evaluation of its performance demonstrates exceptional NO 3 – removal efficiency (99.5%) and remarkable N 2 selectivity (95.5%), with 13.7 and 4.1 times higher rate constants of NO 3 – removal than the individual Cu@CN and TiO x components. Notably, this catalyst exhibits impressive stability across multiple cycles, maintaining consistent high conversion rates and selectivity. Mechanistic insights unveiled a tandem reaction pathway where Cu@CN selectively reduced NO 3 – to NO 2 – , followed by the TiO x -mediated CO 2 • – generation, enabling highly selective NO 2 – to N 2 conversion. This unique catalytic system, featuring spatially separated redox-active sites, presents a promising avenue for efficient, selective, and stable denitrification processes, offering significant potential in addressing water pollution challenges and advancing tandem catalytic systems.
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ACS Sensors
·
2025
·
IF 9.1
Lingli Ji,Jie Sun,Baijing Li,Shuo Cheng,Zhao Zhang,Feng Gao,Jianbo Sun
Accurately detecting hydrogen sulfide in the environment and monitoring its pollution sources are crucial for pollution assessment and personal safety. However, rapid detection is a challenge due to the influence of carrier behavior and surface adsorption states. In this paper, Cu-doped W18O49 nanowires were synthesized by the solvothermal method. The surface field effect phenomenon resulting from doping and H2S adsorption enables a rapid response to H2S with significantly improved responsivity. We characterized the material’s structure and properties by SEM, TEM, and XRD techniques, verified the surface microelectric field effect by combining XPS and field effect device in situ gas sensing characterization, and discussed the sensitive mechanism of hydrogen sulfide.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Zhengshuai Cao,Mu Li,Li Shan,Mingshang Liu,Wenming Li
SnTe is an environmentally friendly and promising alternative thermoelectric material in contrast to harmful PbTe. However, the long-lasting high lattice thermal conductivity significantly inhibits the further enhancement of the thermoelectric figure of merit ZT. Herein, this study proposed a strategy of solvothermal copper doping to considerably reduce the lattice thermal conductivity by introducing multiscale hierarchical structures. The structural and morphological characterizations indicate that Cu was doped as interstitial atoms and secondary-phase Cu1.80Te. Simultaneously, this study reveals that Cu1.80Te and the SnTe matrix stem from nanoparticles and octahedral structures, respectively. In the sintered bulks, phonon scattering was significantly increased owing to the abundant micro/nanopores, Cu1.80Te nanoprecipitates, grain boundaries of SnTe, and phase boundaries between Cu1.80Te and SnTe. The increased phonon scattering leads to a lattice thermal conductivity of ∼0.36 W m–1 K–1 at 773 K, which is lower than that of pristine SnTe. Benefiting from this substantially decreased thermal conductivity, a ZT value of ∼0.91 was achieved in Sn0.98Cu0.02Te. The enhancement is ∼300% over pristine SnTe. This work provides an effective method to fabricate high-performance energy-effective SnTe-based thermoelectric materials.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 9
·1-12
·
IF 5.3
Chen Rui,Pang Chaohai,Ma Xionghui,Wu Xuejin,Liu Chunhua,Yin Guihao,Zhang Zhenshan,Li Shuhuai
An ECL signal amplification strategy is introduced leveraging a multimetallic catalytic amplification effect. Nickel–iron bimetallic oxide compounds were synthesised and loaded with Cu SAs catalysts on their surface to create nickel–iron layered double hydroxides/copper single atoms (NiFe-LDHs/Cu-SAs) with robust catalytic properties. These NiFe-LDHs/Cu-SAs were employed as signal amplification elements to modify gold electrodes. C-dots labelled with thiacloprid DNA aptamers were used as the signal and molecular recognition elements to construct an electrochemiluminescence (ECL) immunosensor. The NiFe-LDHs/Cu-SAs significantly amplified the ECL signal of the C-dots, enhancing the sensitivity of the sensor. Upon capturing thiamethoxam via the aptamer, the ECL signal was effectively quenched, demonstrating the potential of this approach as a highly sensitive method for thiamethoxam detection. The excellent catalytic performance of NiFe-LDHs/Cu-SAs amplified the detection signal over 20-fold, while the aptamer improved the specificity of the sensor for thiamethoxam recognition. The method demonstrates a linear range of 2–6000 × 10 −12 mol/L and a detection limit of 6.52 × 10 −13 mol/L, with recoveries of 90%–110% for real sample analysis. This study demonstrates a highly sensitive and specific method for thiamethoxam detection, with real-world applicability, while highlighting an innovative multimetallic catalytic strategy that can facilitate advancements in sensor design across various fields. Graphical
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ACS Catalysis
·
2025
·
IF 13.1
Xiaodong Wen,Qizhi Min,Xiaodong Liu,Gang Zhao,Junyao Wang,Qinshang Xu,Guoshuai Shi,Liming Zhang,Wenhua Zhang,Yude Su
Structural reconstruction─an uncontrollable process that compromises the stability of Cu-based catalysts in electrochemical CO2 reduction (CO2R)─presents a major scientific challenge that has yet to be overcome. In this work, we develop a well-controlled SiO2 encapsulation approach to stabilize Cu-based CO2R electrocatalysts against reconstruction. Using Cu nanowires (CuNWs) as a model platform, we demonstrate that SiO2 encapsulation can significantly suppress Cu reconstruction while retaining ∼95% of the initial CO2R performance over 24-h stability tests at −1.15 V vs reversible hydrogen electrode (VRHE). In contrast, unencapsulated CuNWs exhibit severe structural deterioration with attenuated CO2R activity under identical testing conditions. In situ Raman studies and density functional theory (DFT) calculations reveal that the antireconstruction effect results from the formation of a robust Cu–O–Si interface that can not only serve as a structural anchor but also contribute to strengthening the Cu–Cu bonding at the exposed Cu active sites during CO2R operation. These results decipher the stabilizing mechanism of SiO2 encapsulation, and provide key insights for designing durable Cu-based CO2R electrocatalysts toward practical applications.
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Energy Storage Materials
·
2025
·
IF 20.2
Siyu Fang,Tiansheng Bai,Jialin Liao,Shuai Zhang,Jiaxian Wang,Funian Mo,Wei Zhai,Zhenglin Hu,Jingyu Lu,Kwun Nam Hui,Lijie Ci,Deping Li
Lithium metal anodes hold the potential for high-energy-density batteries due to their substantial theoretical capacity, but their practical application is hindered by issues such as dendrite growth, poor cycling stability, and safety concerns. This study presents the development of a three-dimensional Li-Si composite alloy anode (Ag@Cu@Li-Si), combining a porous copper scaffold with a lithiophilic silver (Ag) layer and a lithium-silicon (Li-Si) alloy. The Ag@Cu@Li-Si composite demonstrates significant improvements in dendrite suppression, cycling stability, and electrochemical performance. The composite anode exhibits a critical current density of 15 mA cm −2 and over 900 hours of stable operation at 1.0 mA cm −2 in symmetric cells. When integrated into a full cell with a commercial LiFePO 4 cathode, it maintains excellent cycling stability, delivering over 600 cycles with a rate capability of 1.0 C. This study provides valuable insights into the design of lithium metal anodes, highlighting the importance of lithiophilic materials and 3D frameworks for high-performance lithium-metal batteries.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Liangyuan Chen,Jiangfeng Liu,Jitao Shang,Jin-Xiu Liu,Zhaofu Zhang,Xiaolin Liu,Du Wang,Yan Zhao
The instability of Zn anodes arising from uncontrolled deposition remains a critical bottleneck for zinc-metal batteries. Here, a sustainable Zn/Cu co-deposition strategy is reported via a cost-effective ethanol-based hybrid electrolyte (EtZCL-Cu) containing ZnCl 2 and insoluble Cu(OH) 2 additives. The high Cl − concentration enables continuous Cu 2+ release via complexation-driven Cu(OH) 2 dissolution, facilitating spontaneous Zn/Cu displacement-alloying reactions during cycling. This dynamic reconstruction mechanism ensures long-term exposure of zincophilic Cu sites on the electrodeposited Zn surface, thereby effectively preventing the defunctionalization of zincophilic alloy interfaces. The reconfigurable alloy interface maintains zero nucleation overpotential and enables dendrite-inhibited Zn electrodeposition, achieving exceptional cycling stability (>6000 h) in Zn symmetric cells. The ethanol solvent and Cl − complexed Cu + /Cu 2+ redox couple cooperatively increase the capacity of the activated carbon cathode full cells, delivering >90 mAh g −1 over 10,000 cycles at 0.5 A g −1 , with 95.9% capacity retention. This work establishes a sustainable interfacial engineering paradigm through electrolyte-mediated in situ alloying, effectively addressing the critical challenge of zincophilic interface defunctionalization in Zn-metal battery systems.
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