Small
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2025
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IF 12.1
Min Zhu,Ting Zhang,Jinlong Wu,Xiuli Wang,Jin Zhang,Feng Li,Jing Li
Lattice strain is widely recognized as an effective strategy for tuning transition metal catalytic activity, yet its direct impact on electrochemical CO₂ reduction (ECO₂RR) remains not fully understood. In this work, a strategy of Cu-doped Ag is employed to construct a series of AgCu nanosheet structures (NS) with varying lattice compression rates (from −1.90% to −2.75%). Density Functional Theory (DFT) calculations, along with in situ infrared spectroscopic analysis, demonstrate that Cu incorporation efficiently modulates the electronic structure of Ag, promoting enhanced charge transfer. Especially, the changed lattice compression rates can alter the charge density at adsorption sites, thereby ameliorating the surface coverage of CO and adsorption energy of the reaction intermediates ( * COOH and * CO). As a result, the AgCu 5% catalyst exhibits a maximum Faradaic efficiency (FE) of 95.5% for CO production in an H-cell and 98% in a flow cell at −0.8 V RHE , respectively. Simultaneously, the AgCu 5% catalyst achieves FE CO of above 86% in the ultrawide current range of 33–215 mA cm −2 . The work affords an effective way to use a strain compression strategy to improve the CO 2 reduction performance.
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Nature Communications
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2024
·Vol. 15
·期 1
·1-11
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IF 14.7
Liu Yan,Wei Jie,Yang Zhengwu,Zheng Lirong,Zhao Jiankang,Song Zhimin,Zhou Yuhan,Cheng Jiajie,Meng Junyang,Geng Zhigang,Zeng Jie
The nitrate (NO 3 − ) electroreduction into ammonia (NH 3 ) represents a promising approach for sustainable NH 3 synthesis. However, the variation of adsorption configurations renders great difficulties in the simultaneous optimization of binding energy for the intermediates. Though the extensively reported Cu-based electrocatalysts benefit NO 3 − adsorption, one of the key issues lies in the accumulation of nitrite (NO 2 − ) due to its weak adsorption, resulting in the rapid deactivation of catalysts and sluggish kinetics of subsequent hydrogenation steps. Here we report a tandem electrocatalyst by combining Cu single atoms catalysts with adjacent Co 3 O 4 nanosheets to boost the electroreduction of NO 3 − to NH 3 . The obtained tandem catalyst exhibits a yield rate for NH 3 of 114.0 mg \({}_{{{{{{\rm{NH}}}}}}_3}\) h −1 cm −2 , which exceeds the previous values for the reported Cu-based catalysts. Mechanism investigations unveil that the combination of Co 3 O 4 regulates the adsorption configuration of NO 2 − and strengthens the binding with NO 2 − , thus accelerating the electroreduction of NO 3 − to NH 3 .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaodan Jiang,Jiabao Guo,Yuhan Zhang,Hubao Zuo,Yuanqi Bao,Nian Liu,Mingna Guo,Ronghai Wu,Qiang Chen
Porous architecture of titanium implants offers significant advantages in promoting osseointegration and mitigating the “stress shielding” effect. However, challenges remain in enhancing vascularization and preventing infection, especially given the complexities of modifying the intricate surface structure of porous titanium (PT). This study introduces a novel surface modification technique of PT using anti-gravity perfusion electrophoretic deposition (EPD) technique to fabricate antibacterial coatings containing silver (Ag) and copper (Cu) co-doped mesoporous silica nanoparticles (Ag-Cu@MSN) and chitosan binder on the surface of PT. The developed coating exhibits rapid and stable photothermal response to 808 nm near-infrared (NIR) light, leading to a localized temperature rise and triggered release of Ag and Cu ions for synergistic bactericidal efficacy against both E. coli and S. aureus . In vitro studies further demonstrated that the coated PT significantly promoted the proliferation of mouse calvaria pre-osteoblast (MC3T3-E1) and human umbilical vein endothelial cells (HUVECs), with a notable increase in HUVECs migration and angiogenesis, attributable to the presence of Cu ions. This innovative EPD-based coating strategy offers a promising avenue for developing uniform, photothermally-activated antibacterial surfaces on PT implants, with substantial implications for advancing clinical bone repair applications.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Dan Liu,Xujia Pan,Zebo Wu,Huibin Yin,Shimin kang,Kezi Yao,Haojie Qian,Yongjun Xu
Aqueous-phase reforming of methanol (APRM) stands out as a viable approach for providing hydrogen to polymer electrolyte fuel cells, offering advantages over traditional gas-phase methodologies conducted at relatively high temperatures. Nevertheless, the development of an effective and hydrothermally stable non-noble-metal catalyst remains a formidable challenge. This paper presents a series of resilient and efficient Cu/CuOx/C catalysts synthesized by encapsulating Cu/CuOx nanoparticles (NPs) within a carbon matrix, utilizing Cu-BTC as a precursor. The Cu-CuOx/C-700 catalyst, in particular, demonstrates a remarkable hydrogen evolution rate of 33.7 μmol·gcat−1·s−1 at 210 °C, significantly surpassing that of conventional catalysts. The exceptional stability of the Cu/CuOx/C catalysts can be ascribed to the protective carbon coating, which enhances the interaction between the Cu/CuOx NPs and the support and primarily inhibits the aggregation of copper nanoparticles under harsh aqueous reaction conditions. The reused catalysts were explored through XRD and ICP-OES analyses, which indicated that the structural integrity of the Cu-CuOx/C catalysts is largely preserved.
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ACS Applied Nano Materials
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2025
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IF 5.5
Lekang Liu,Mingbo Shao,Luoyuan Guo,Wenjun Wang,Xiuwen Zheng,Xiaolei Jiang
We have developed an innovative Cu-doped and DTX-loaded Cu-MnO2@DTX@FA (MCDF) nanodrug designed to strategically alter tumor microenvironment (TME) by harnessing the synergistic effects of chemodynamic therapy (CDT), chemotherapeutic agents, and the induction of ferroptosis and cuproptosis. The MCDF nanodrug efficiently degrades, releasing abundant Mn4+, Cu2+, and DTX. The conversion of Cu2+ to Cu+ facilitated by FDX1 initiates cuproptosis, while, similar to Mn2+, Cu+ reacts with hydrogen peroxide (H2O2) to generate hydroxyl radicals (·OH). Cu2+ and Mn4+ oxidize glutathione (GSH), significantly depleting GSH levels in tumor cells and inactivating GPX4, which further promotes ferroptosis. The release of Cu2+ and Mn4+ intensifies the cuproptosis. DTX effectively disrupts the cell division cycle, thereby inhibiting the proliferation and spread of tumor cells. The FA-modified MCDF is designed to evade immune detection while selectively targeting tumor tissues, ensuring precision in treatment delivery. This cutting-edge material not only provides a multifunctional therapeutic strategy but also sets the stage for the next generation of tumor-targeting nanomedicines.
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-15
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IF 3.8
Yue Jiayuan,Zheng Qi,Ding Shushu,Yin Yujian,Zhang Xiaodan,Wang Liyun,Gu Yipeng,Li Jiejia,Zhang Yuhan,Shi Yurou,Dong Yuetan,Zhu Qing,Duo Huixiao
In this study, the removal effect of a new MOF-on MOF adsorbent based on Cu–Co bimetallic organic frameworks on tetracycline antibiotics (TCs) in water system was studied. The adsorbent (Cu-MOF@Co-MOF) were synthesized by solvothermal and self-assembly method at different concentrations of Co 2+ /Cu 2+ . The characterization results of SEM, XRD, XPS, FTIR and BET indicated that the MOF-on MOF structure of Cu-MOF@Co-MOF exhibited the best recombination and physicochemical properties when the molar ratio of Co 2+ : Cu 2+ is 5:1. In addition, the Cu-MOF@Co-MOF have a high specific surface area and bimetallic clusters, which can achieve multi-target synergistic adsorption of TCs. Based on above advantages, Cu-MOF@Co-MOF provided a strong affinity and could efficiently adsorb more than 80% of pollutants in just 5 to 15 min using only 10 mg of the adsorbent. The adsorption capacity of tetracycline and doxycycline was 434.78 and 476.19 mg/g, respectively, showing satisfactory adsorption performance. The fitting results of the experimental data were more consistent with the Langmuir isotherm model and pseudo-second-order kinetic model, indicating that the adsorption process of TC and DOX occurred at the homogeneous adsorption site and was mainly controlled by chemisorption. Thermodynamic experiments showed that Cu-MOF@Co-MOF was thermodynamically advantageous for the removal of TCs, and the whole process was spontaneous. The excellent adsorption capacity and rapid adsorption kinetics indicate the prepared MOF-on MOF adsorbent can adsorb TCs economically and quickly, and have satisfactory application prospects for removing TCs in practical environments. The results of the study pave a new way for preparing novel MOFs-based water treatment materials with great potential for efficient removal.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xinrui Han,Geng Li,Weiyan Su,Xusheng Xu,Mengjiao Yu,Guangyu Wu,Weinan Xing
The degradation of recalcitrant antibiotics through the activation of peroxymonosulfate (PMS) is an important branch of advanced oxidation processes (AOPs), with widespread attention given to the application of metal-organic frameworks (MOFs) in this field. The article successfully synthesized Cu x O/N-doped carbon/Cu-MOF (Cu x O/NC/Cu-MOF) nanocomposites by low-temperature thermal treatment of Cu-MOF precursors. Compared with the original MOF, these partially decomposed composite materials exhibit significantly stronger catalytic activity towards PMS, efficiently removing organic pollutants such as tetracycline (TC). After optimization, the sample treated at 400 °C, under visible light with PMS assistance, achieves an impressive degradation rate, almost completely degrading a 50 mL TC solution (10 mg/L) after 80 min. This achievement surpasses the degradation rate observed with the original Cu-MOF by 2.1 times. In the composite system of Cu x O/NC/Cu-MOF+PMS+Vis, the significant enhancement of activity is credited to the effective spatial separation of photogenerated electrons and holes, as well as the utilization of 1 O 2 as the primary active oxygen species. This work provides a simple preparation strategy for the development of Cu-based PMS activators with excellent photocatalytic performance.
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TALANTA
·
2024
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IF 5.6
Xiupei Yang,Xiaoyi Xie,Ling Jiang,Yuxiu Fan,Chenglin Zhang,Ya Wang
Most conventional nanozymes have poor specificity and low activity, and designing high-performance nanozymes remains a challenge. In contrast, single-atom nanozymes have high atom utilization and high reactivity. Here, we prepared Cu single-atom nanozymes (Cu-NC) with excellent peroxidase-like activity by high-temperature pyrolysis using Cu as a transition metal source. The introduction of Cu formed the Cu-N x active site, which accelerated charge transfer between the reactants and the active site and was the key for improving the activity. With Cu-NC as a catalyst, H 2 O 2 rapidly oxidized 3,3′,5,5′-tetramethylbenzidine (TMB) to oxTMB, and the solution turned blue with strong absorption at 652 nm. Because d -penicillamine (D-PA) can reduce oxTMB or react with reactive oxygen species radicals to inhibit the color reaction, we built a colorimetric sensing platform around Cu-NC for the determination of D-PA and successfully used it for the determination of D-PA in urine samples. This work provides new ideas for the design of high-performance nanozymes and the detection of D-PA in real environments.
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Materials Today Chemistry
·
2024
·
IF 6.7
Yiting Jiang,Zhejie Chen,Yating Yuan,Linxin Tian,Chuhuang Dong,Wencheng Shen,Jinchao Wei,Shengpeng Wang,Yu Yang,Jia Ge
Alpha-glucosidase (α-Glu) is a hydrolase that promotes the rise of glucose in the blood during the digestion process, and it plays a crucial role in regulating glucose levels within a normal range. Herein, we developed an ultrasensitive colorimetric platform by preparing a Cu–N–C single-atom nanozyme (Cu–N–C SAzyme) with a potent oxidase-like effect on accurately detection of α-Glu and efficient screening of its potential inhibitors. This artificial nanoenzyme was able to catalyze the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue oxide (oxTMB) without the assistance of H 2 O 2 . In addition, with the participation of α-Glu, l -ascorbic acid-2- O -α- d -glucopyranose (AAG) can be catalyzed to produce ascorbic acid (AA), which significantly reduces the oxidation, resulting in a noticeable fading of the blue color. Therefore, we designed a straightforward colorimetric test for α-Glu activity, achieving detection limits as low as 0.09 U/L and a linear response from 0.25 to 8 U/L. Most importantly, this platform has been effectively applied to measure α-Glu in real samples.
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ACS Sensors
·
2024
·
IF 8.2
Huan Wang,Chonghui Zhu,Xiaohui Yan,Zhaorui Zhang,Huashuai Hu,Mengmeng Xu,Yu Liang,Minghui Yang
Fuel cell gas sensors have emerged as promising advanced sensing devices owing to their advantageous features of low power consumption and cost-effectiveness. However, commercially available Pt/C electrodes pose significant challenges in terms of stability and accurate detection of low concentrations of target gases. Here, we introduce an efficient Cu–Pt/CrN-based fuel cell gas sensor, designed specifically for the ultrasensitive detection of hydrogen sulfide (H2S) at room temperature. Compared to the commercial Pt/C sensor, the Cu–Pt/CrN sensor exhibits excellent sensitivity (0.26 μA/ppm), with an increase in the selectivity by a factor of 2.5, and demonstrates good stability over a 2 month period. The enhanced sensing performance can be attributed to the modulation of the electronic arrangement of Pt by Cu, resulting in an augmentation of H2S adsorption. The Cu–Pt/CrN fuel cell gas sensor provides an opportunity for detecting parts per billion-level H2S in various applications.
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ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Min Zhang,Jin Wang,Xinyuan Zhan,Wusong Xu,Maolin He,Ding Ma,Zhengbo Yue
Thiocyanate (SCN − ), a non-volatile inorganic pollutant, is commonly found in various types of industrial wastewater, which is resistant to hydrolysis and has the potential to be toxic to organisms. Premagnetized iron-copper-carbon ternary micro-electrolytic filler (pre-Fe/Cu/C) was prepared to degrade SCN − . Pre-Fe/Cu/C exhibited the most significant enhancement effect on SCN − removal when magnetized for 5 min with an intensity of 100 mT, and the SCN − removal rate was the highest at an initial pH of 3.0 and an aeration rate of 1.6 L/min. The electrochemical corrosion and electron transfer in the pre-Fe/Cu/C system were confirmed through SEM, XPS , FTIR , XRD , and electrochemical tests. This resulted in the formation of more corrosion products and multiple cycles of Fe 2+ /Fe 3+ and Cu 0 /Cu + /Cu 2+ . Additionally, density functional theory (DFT) calculations and electron paramagnetic resonance (EPR) were utilized to illustrate the oxygen adsorption properties of the materials and the participation of reactive oxygen species ( 1 O 2 , ·O 2 − , and ·OH) in SCN − removal. The degradation products of SCN − were identified as SO 4 2− , HCO 3 − , NH 4 + , and N 2 . This study introduced the use of permanent magnets for the first time to enhance Fe/Cu/C ternary micro-electrolytic fillers, offering a cost-effective, versatile, and stable approach that effectively effectively enhanced the degradation of SCN − .
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yang Liu,Guiliang Li,Qiu Han,Haibo Lin,Qiang Li,Gang Deng,Fu Liu
The removal of urea poses a significant challenge in reclaiming waste dialysate, especially for portable dialysis. Here, we developed a novel Cu (II)-phenolic complex incorporated hemodialysis membrane through an adsorption-diffusion mechanism for efficient urea removal. The synergistic effect between the hemodialysis membrane and the adsorbent composed of tannic acid (TA), polyethyleneimine (PEI), and Fe (II)/Cu (II) bimetal ions exhibited enhanced coordination towards amine groups present in urea, resulting in rapid adsorption kinetics and high adsorption capacity via chemical interactions. Additionally, uniformly distributed Cu (II) sites on the membrane surface promoted the hemocompatibility by converting S-nitrosothiol to nitric oxide (NO), thereby inhibiting platelet activation. In simulated hemodialysis experiments, our adsorptive-diffusive membrane demonstrated high removal efficiency (∼90 %) for urea using 1 L dialysate compared to ∼10 % of pristine membrane. The incorporation of Cu (II)-phenolic complex into the hemodialysis membrane presents a novel approach for enhancing urea removal, thereby reducing dialysate consumption and simultaneously improving the hemocompatibility of the membrane.
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