INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 8.3
Baker Rhimi,Attiq Ur Rehman,Yuanzhi Hu,Sherif A. El-Khodary,Zhehao Liu,Min Zhou,Karim Harrath,Qiang Ma,Long Zhao,Zhifeng Jiang,Weidong Shi
The development of efficient and stable photocatalysts for hydrogen evolution is crucial for solar-to-fuel conversion. Here, we report Cu-porphyrin (CuTCPP)/oxygen-doped g-C 3 N 4 (O–CN) nanohybrids as high-performance sonophotocatalysts, where strong π–π stacking interactions create robust heterojunctions that promote efficient charge separation and transfer. The optimal 2 % CuTCPP/O–CN2 sample exhibited a 3.3-fold enhancement in H 2 evolution compared to O–CN2 under simulated light coupled with ultrasonication. Experimental results combined with density functional theory (DFT) calculations confirmed the suppression of charge recombination and highlighted the synergistic contribution of ultrasonic excitation with light irradiation. Furthermore, oxygen doping was found to not only reinforce the CuTCPP/O–CN interface but also provides robust anchoring sites for Pt cocatalysts, preventing leaching and aggregation while electronically modulating Pt to optimize its d-band center and H 2 adsorption free energy. These findings provide valuable insights into the rational design of stable and high-active hybrid photocatalysts for solar fuel generation.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Pengchao Ren,Xin Fu,Shihang Meng,Yehao Yu,Yujing Weng,Liang Si,Yulong Zhang,Yi-Fan Han
Ce-modified CuZn-based catalysts show promising performance in CO 2 hydrogenation to methanol. However, probing the nature of their active surface and elucidating the role of Ce in regulating reaction pathways at the molecular level remain challenging. In this study, a series of CuZnCe catalysts were prepared with varying CeO 2 contents. Kinetic tests reveal that CuZnCe catalysts exhibit significantly higher activity and methanol selectivity compared to the unmodified CuZn catalyst. In-situ AP-XPS analysis demonstrates that Ce species preferentially migrate toward the catalyst surface and exist predominantly in the form of Ce 3 + during CO 2 hydrogenation to methanol. In-situ DRIFTS confirms that the CuZn catalyst facilitates the direct hydrogenation of CO 2 to methanol via a formate intermediate. In contrast, the introduction of Ce shifts the reaction mechanism toward the reverse water-gas shift reaction followed by CO-hydrogenation (RWGS + CO-hydro), as Ce 3+ sites display a high propensity to stabilize carboxylate (CO 2 δ- ) intermediates derived from CO 2 . Meanwhile, the Cu-ZnO x interface remains essential for H 2 dissociation and supplying hydrogen species. The enhanced catalytic performance of the CuZnCe catalysts is primarily attributed to the synergistic effects between the Cu-ZnO x and Cu-CeO x interfaces. These findings highlight the pivotal role of metal-oxide interfaces in controlling reaction pathways and methanol selectivity during CO 2 hydrogenation to methanol, providing valuable insights for the rational design of high-performance catalysts.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 3
·126
·
IF 5.4
Zhou Yu,Wu Runqiang,Fan Lingling,Qui Pengtao,Deng Xiaohua,Tan Xiaohong,Dong Shuaikang,Li Canru,Chen Jiejing,Liang Jintao,Li Guiyin
Hepatocellular carcinoma (HCC) is one of the most lethal malignancies worldwide, and early diagnosis is crucial. Golgi protein 73 (GP73) has emerged as a promising serum biomarker for HCC. However, current detection methods often fail to meet routine screening requirements due to limitations in sensitivity and operational simplicity. To address these challenges, we have developed a novel fluorescent aptamer-based sensor for highly sensitive GP73 detection based on the fluorescence resonance energy transfer (FRET) mechanism between graphitic carbon nitride quantum dots (g-CNQDs) and a copper-based metal–organic framework (Cu-TCPP). g-CNQDs were covalently conjugated with a GP73-specific aptamer to serve as the fluorescent donor, while two-dimensional Cu-TCPP nanosheets acted as the efficient acceptors. Fluorescence was quenched upon donor–acceptor interaction via FRET. In the presence of GP73, aptamer–target binding disrupted FRET interaction, separating the donor from the acceptor and restoring fluorescence in a concentration-dependent manner. Under optimal conditions, the sensor exhibited excellent linearity over a concentration range 1.0–225.0 ng mL⁻¹, with a detection limit as low as 0.907 ng mL⁻¹. Recoveries for spiked human serum samples ranged from 95.96% to 103.85%, with relative standard deviations (RSDs) of 0.38%–5.48%. The developed aptamer sensor demonstrated excellent sensitivity, selectivity, and stability, providing a powerful tool for early HCC diagnosis and offering strong potential for real-time analytical applications. Graphical A novel fluorescent aptamer sensor for GP73 detection by leveraging the fluorescence resonance energy transfer (FRET) mechanism between graphite-phase carbon nitride quantum dots (g-CNQDs) and a copper-based organic framework (Cu-TCPP). This platform achieved a good linear relationship with GP73 concentration in the range of 1.0–225.0 ng mL -1 for GP73 concentration, and a detection limit of 0.907 ng mL -1 .
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PubMed
高影响因子
Solar RRL
·
2026
·Vol. 10
·期 1
·e202500927
·
IF 4.7
Yu Li,Guo Lu,Jieyu Zheng,Jie Chen,Shuaibing Wang,Mengmeng Ma,Zhijie Wang,Aiwei Tang
Ensuring broad-spectrum visible-light absorption and efficient electron extraction is essential for enhancing the efficiency of photocatalytic hydrogen production. To achieve this, manipulating carrier dynamics through cocatalyst heterojunction engineering has attracted considerable concern. However, conventional narrow-bandgap Cu–In–Zn–S (CIZS) nanocrystals (NCs) typically exhibit limited photocatalytic activity due to severe exciton annihilation. Herein, two-dimensional (2D) CIZS nanobelts (NBs) were coupled with Ni 9 S 8 cocatalyst to construct a library of CIZS/Ni 9 S 8 Schottky heterojunctions synthesized via a combined colloidal one-pot and hot-injection strategy. As anticipated, the CIZS/2.0%Ni 9 S 8 heterojunction displayed the optimal photocatalytic hydrogen evolution activity of 2.75 mmol g −1 h −1 , ≈3.31 times higher than that of pristine CIZS NBs (0.83 mmol g −1 h −1 ). Experimental results uncovered that the enhanced photocatalytic performance originated from the formation of the CIZS/2.0%Ni 9 S 8 Schottky heterojunction, which facilitated efficient charge transfer from CIZS NBs to Ni 9 S 8 and hindered the return of electrons. Moreover, Ni 9 S 8 serves as active catalytic sites, significantly accelerating surface proton reduction reactions. This study provides valuable insights into the rational design and precise synthesis of colloidal multinary Cu-based chalcogenide heterojunctions for efficient photocatalytic energy conversion.
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HYDROGEOLOGY JOURNAL
·
2026
·
IF 2.3
Wang Huan,Zhang Zhenfei,Liang Haozhi,Liu Yongyi,Du Xinqiang
Clogging of porous media during artificial recharge is a technical bottleneck that limits the application of this technology. Sand column experiments were used to simulate the clogging of porous media to explore the effect of Cu(II) alone and in combination with suspended solids on hydraulic conductivity ( K ). The results indicate that at the end of experiments, the normalized hydraulic conductivity ( K ’) in experimental groups with Cu(II) concentrations of 1, 3, and 5 mg/L decreased to 0.634, 0.323, and 0.242, respectively. The degree of clogging increases with increasing Cu(II) concentration. At the end of recharge, the K ’ of the porous media in the 1 mg/L Cu(II), 100 NTU kaolin, and 100 NTU kaolin + 1 mg/L Cu(II) experimental groups decreased to 0.634, 0.233, and 0.016, respectively. The presence of Cu(II) and kaolin can individually cause clogging of porous media, but when Cu(II) coexists with kaolin, the degree of clogging significantly intensifies. The impact of Cu(II) and kaolin on porous media is not simply additive, but synergistic. The presence of Cu(II) changes the surface charge of suspended solids, increases particle size, and enhances migration, thereby significantly exacerbating clogging. This study systematically elucidates the clogging mechanism of suspended solids under the influence of Cu(II), thus providing a scientific basis for the design and management of artificial recharge systems.
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Green Energy & Environment
·
2026
·
IF 14.6
Chunxia Wang,Yanxin Sun,Zhuo Wang,Yifeng Zeng,Qin-Yi Li,Xinchen Kang,Guoyong Huang
Copper (Cu) doping modifies the band structure of TiO 2 by slightly narrowing the bandgap and shifting the Fermi level, while creating localized states that serve as temporary electron reservoirs to suppress carriers rapid recombination. On this basis, a ternary heterojunction Cu-TiO 2 /g-C 3 N 4 (Cu-CT) was constructed by anchoring Cu-TiO 2 onto g-C 3 N 4 nanosheets. The synergistic interaction between Cu-doping and the S-scheme interfacial configuration generates an internal electric field that promotes vectorial carrier migration, enabling electrons in the conduction band of Cu-TiO 2 and holes in the valence band of g-C 3 N 4 . This spatial separation preserves strong redox potentials and markedly suppresses recombination. Consequently, Cu-CT achieves a hydrogen evolution rate of 10.21 mmol g -1 h -1 , more than twenty times higher than pristine TiO 2 . In-situ XPS, KPFM, and DFT analyses collectively validate the S-scheme charge-transfer pathway and highlight the synergistic role of Cu doping with heterojunction engineering, providing mechanistic insights to the rational design of advanced ternary photocatalysts for efficient solar-driven hydrogen production.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Jinquan Liu,Siru Liu,Jiao Shi,Dongyun Xu,Guoqing Qin,Yuxiang Duan,Ruoxuan Chen,Xuan Wang,Yan Tan,Shengyuan Yang,Le Li
The development of reliable sensing platforms for the simultaneous detection of multiple heavy metal ions has remained challenging in environmental monitoring. Herein, a novel ratiometric electrochemical sensor was developed using a Cu-MOFs@MnO 2 NSs composite for the simultaneous quantification of Pb 2+ and Hg 2+ . The composite was synthesized through a facile approach and functionalized onto a screen-printed carbon electrode (SPCE) to establish an efficient sensing interface. This design capitalized on the synergistic properties of both components: MnO 2 nanosheets provided abundant surface hydroxyl groups and enhanced electrical conductivity, while Cu-MOFs contributed a large specific surface area with multiple binding sites for metal ion enrichment. Significantly, the incorporated Cu-MOFs functioned as an internal reference, delivering a stable built-in signal for ratiometric analysis. The developed sensor achieved impressive detection limits of 22.69 nmol/L for Pb 2+ and 30.07 nmol/L for Hg 2+ , while maintaining high selectivity and reproducibility in complex matrices. This study not only established a reliable platform for the accurate detection of Pb 2+ and Hg 2+ but also promoted the adoption of ratiometric strategies in electrochemical sensing to support environmental protection and public health security.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
·
IF 3.807
Wanqi Zheng,Yanyan Liu,Peipei Yang,Yuyu Chen,Jia Tao,Jianqiang Hu,Peng Zhao
Diabetes is a metabolic disease characterized by hyperglycemia, which can only be controlled by treatment at present. In order to monitor the course of diabetes, it is significantly important to develop a sensor with superior sensitivity, which can detect the glucose accurately and rapidly. In this paper, the copper-based metal organic framework (Cu-MOF) was found to have a significant electrocatalytic effect on glucose, and the synergistic effect of nanocomposite of Cu-MOF and carbon nanohorns (CNHs) was utilized to construct an effective biosensing interface for the glucose. Under the optimal conditions, Cu-MOF/CNHs modified glass carbon electrode (GCE) showed favorable electrochemical properties toward glucose in the wide range from 250 nM to 1.2 mM with a limit of detection of 78 nM (S/N = 3). Meanwhile, the Cu-MOF/CNHs/GCE was applied for the blood glucose analysis and achieved comparable results with clinical method (hexokinase method). The determination of glucose in commercial pear juice also indicated its reliability and accuracy. The proposed strategy not only provided a sensitive detection method for glucose but also paved a new way for the application of metal organic framework .
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Yonghua Wang,Ruilin Wang,Yucheng Hu,Lin Zheng,Ganhua Fu,Gang Wang,Yufeng Zhou,Qiaomu Xie,Jingong Pan,Shou Peng
In recent years, the study of Cu (Ӏ) precursors in high-performance CdTe thin-film solar cell devices has received increasing attention. However, few studies have been reported on nanoscale Cu (I) precursors in large-area CdTe devices (≥1 cm 2 ). Here, three different Cu (Ӏ) nano precursors have been rapidly prepared by solution method (CuCl ethanol solution, CuI acetonitrile solution, and CuSCN aqueous ammonia solution) and their effects on the performance of commercial large-area CdTe thin-film solar cells have been investigated. The results show that the distribution amount and uniformity of the nano precursor particles on the CdTe back surface have a large impact on the device performance. The CuCl nanoparticles are more uniformly distributed and the device performance is more excellent. CuI nanoparticles easily formed clusters at grain boundaries. Denser distribution of CuSCN nanoparticles . The thermal diffusion conditions (temperature, time and precursor concentration) have a significant effect on the device performance, but the most reasonable thermal diffusion conditions tend to be the same for all devices. This suggests that the thermal diffusion conditions are determined by the nature of the CdTe absorber layer itself and are not interfered by different nano precursors.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Yu Xin,Haoyi Mou,Chang Miao,Shuqing Nie,Minyue Wen,Guowen He,Wei Xiao
The SnCu-SiO 2 @CNFs composite nanofibers are successfully fabricated by electrospinning and subsequent heat treatments, in which the Sn-Cu alloy particles are uniformly confined in carbon nanofibers (CNFs) in the presence of SiO 2 . The characterization results show that incorporating SiO 2 into the CNFs matrix can mitigate the problem of the phase separation between Sn-Cu alloy particles and CNFs and increase the fibrous structural integrity of the composite electrodes. Importantly, the SnCu-SiO 2 @CNFs-1.0 composite electrode displays the improved electrochemical performance when the amount of Cu(Ac) 2 is controlled at 1.0 mmol, in which the discharge specific capacity of the electrode not only delivers 501.8 mAh/g after 100 cycles at 100 mA/g, but also retains 467.4 mAh/g after rate cycles when the current density is abruptly recovered to 100 mA/g. Moreover, the SnCu-SiO 2 @CNFs-1.0 electrode can possess an enhanced Li + diffusion coefficient of approximately 1.58 × 10 −16 cm 2 s −1 and a high Warburg coefficient of 568.9 Ω cm 2 s −0.5 at room temperature. The enhanced electrochemical performance can be partly ascribed to the complete encapsulation of Sn-Cu alloy particles by the CNFs matrix, and partly to the promotion of the over-all electronic conductivity. Furthermore, the flexible and conductive CNFs matrix and the stable Cu 6 Sn 5 phase can conjoinedly accommodate the volume change of the electrodes during charge/discharge processes. Therefore, the facile strategy for encapsulating Sn-Cu alloy particles into CNFs may offer some a prospective instruction for the alloy anodes in the field of energy storage.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Ruxia Song,Shihong Zhang,Yi He,Teng He,Hongjie Li,Bo Liu,Zhifei Zhang,Yahui He
A new type of Ni-Cu/Si 3 N 4 nanocomposites was prepared by pulse electrodeposition technology, which can be used for corrosion protection in seawater environment. XRD , SEM, AFM, EDS and XPS were used to study the structure, morphology, and surface composition of the deposited layers. The hardness and anti-corrosion performance of the deposits were evaluated using a microhardness tester and an electrochemical workstation. Meanwhile, the samples were characterized by EIS , SEM, EDS and XPS after immersion in simulated seawater for 7 days, 14 days, and 28 days. The results show that the average crystallite size of the nanocomposite with face-centered cubic structure is 13.2 nm, and has a dense granular nodular structure without obvious defects. EDS and XPS demonstrated the successful embedding of Si 3 N 4 nanoparticles with uniform distribution in the coating. Besides, it was found that embedding Si 3 N 4 particles in Ni-Cu alloy coatings can significantly strengthen the microhardness and anti-corrosion performance of the material. Furthermore, the Ni-Cu-Si 3 N 4 (0.7 g·L −1 ) nanocomposite exhibited excellent corrosion resistance even after immersion in simulated seawater medium for 28 days.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Fei Xu,Yexiang Cui,Di Bao,Dan Lin,Sicheng Yuan,Xiao Wang,Huaiyuan Wang,Yongli Sun
Effective heat removal through polymer composites has become a crucial issue in thermal management. Constructing a 3D interconnected filler network in polymer matrix is generally considered to be one of the most effective strategies for enhancing thermal conductivity of polymer-based composites. Herein, a unique 3D interconnected Cu network was successfully fabricated to enhance the thermal transfer properties of epoxy composites. We used Carbon felt (CFelt) as 3D skeleton to electroplate Cu on the CFelt surface for constructing the 3D Cu film network, which can serve as continuous heat conductive highways. The highly thermally conductive epoxy composites were then prepared by impregnating epoxy resin into the 3D Cu-plated CFelt (Cu-CFelt) network. Taking advantage of the 3D interconnected Cu heat transfer channel, an ultrahigh thermal conductivity of 30.69 W m −1 K −1 was achieved, which exhibited nearly 140 times higher than that of pure epoxy (0.22 W m −1 K −1 ) and 110 times higher than that of CFelt/epoxy composite (0.28 W m −1 K −1 ). And our composite exhibited outstanding thermal behaviors during heating and cooling processes. Additionally, the obtained composite maintained good mechanical properties and presented superior electrical conductivity of 7.49 × 10 4 S cm −1 . Our work reveals that the novel 3D Cu-CFelt/epoxy composites have strong application prospects in thermal management materials.
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