TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Xingtao Cheng,Kaijun Wei,Hongjie Li,Na Teng,Shijun Xu,Quangang Chen,Xianmin Gong,Yi He,Siming Yan
At the present time, the subject of seawater scouring and corrosion phenomena is attracting considerable attention. Accordingly, the present study involved the synthesis of CuPP materials and the preparation of Ni-Cu/CuPP coatings for deployment in marine environments characterised by elevated stress and corrosion. The results show that CuPP can effectively enhance the wear resistance and long-term corrosion resistance of Ni-Cu coatings, which is attributed to ‘fine grain strengthening’ and ‘diffusion strengthening’. Furthermore, the formation of a friction transfer film and the transformation of the wear mechanism are the primary factors contributing to the exceptional wear resistance of the Ni-Cu/CuPP composite coatings.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Yu Su,Xinjie Yin,Xiaofeng Wei,Rui Xu,Liwen Wei,Yanhua Chen,Lan Ding,Daqian Song
A facile and efficient detection method is required to address the potential health risks of ketoprofen (KP) in animal-derived foods. Herein, we integrated molecularly imprinted polymers (MIPs) with Cu-doped Fe 3 O 4 nanozymes (Fe 3 O 4 –Cu) to develop a selective colorimetric sensor for KP detection. Chitosan and glutaraldehyde were used as functional monomers and cross-linkers to fabricate proposed the MIPs@Fe 3 O 4 –Cu. On KP addition, it was specifically captured by the imprinted cavities, thereby blocking the channels between chromogenic substrates and Fe 3 O 4 –Cu. Based on this rationale, a selective colorimetric sensor utilizing MIPs@Fe 3 O 4 –Cu was established, exhibiting a linear range of 0.25–100 μM and a detection limit of 0.073 μM. The developed method was validated through its application in milk samples, yielding satisfactory recoveries with low relative standard deviations. This efficient and selective colorimetric sensor holds immense significance for KP detection in complex samples.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yanhu Han,Zhaowei Jia,Wenxue Gong,Xuechun Wei,Yu Zhang,Mengying Tao,Yaofei Ren,Zuyi Lu,Yutong Wu,Jianhua Chen,Zhongfeng Shi,Zhenxia Zhao,Zhongxing Zhao
Developing photocatalysts with high activity and selectivity remains a significant challenge in the field of CO 2 photoreduction for producing valuable chemical or fuel products under mild conditions. Herein, photonic crystal (PC) GDY-Cu/ZnO was constructed through the in-situ induced growth of graphdiyne (GDY) on PC Cu/ZnO surface via H 2 -reduction for efficient photoreduction of CO 2 to CH 4 . With the aid of photonic crystal structure, PC GDY-Cu/ZnO exhibits a distinctive red-edge slow light region which can significantly improve the utilization efficiency of visible light and intensify photo-catalysis. Additionally, the formed all-solid-state Z-scheme system efficiently accelerates photoelectron migration, facilitating e - /h + separation. Thirdly, the surface GDY, along with the enrich oxygen vacancies generated during H 2 reduction, enhances the adsorption and activation toward CO 2 and H 2 O on PC GDY-Cu/ZnO interface. In consequence, PC GDY-Cu/ZnO demonstrates highly photocatalytic conversion of CO 2 to CH 4 , achieving a CH 4 yield of 33.67 μmol·g −1 ·h −1 with 93.3 % selectivity via slow-light-driven photocatalysis CO 2 reduction. This work provides an efficient strategy to modify ZnO for the efficient photoreduction of CO 2 to CH 4 .
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RARE METALS
·
2024
·
IF 9.6
Zhang Wen-Jing,Jin Li-Guo,Wu Shui-Lin,Wang Chao-Feng,Zheng Yu-Feng,Li Zhao-Yang,Cui Zhen-Duo,Jiang Hui,Zhu Sheng-Li,Liu Xiang-Mei
Deep tissue infections caused by pathogenic bacteria seriously threat the lives of patients. In this study, a smart heterostructured Au/Cu–BTA (BTA = 1,2,4,5-benzenetetramine) with microwave (MW) response is synthesized via NaBH 4 reduction of HAuCl 4 on the Cu–BTA. Au/Cu–BTA exhibits excellent hyperthermy and dynamics under MW irradiation. The MW thermal mechanism of Au/Cu–BTA is attributed to the excellent dielectric loss and polarization of the heterogeneous interface. Meanwhile, the surface energy levels of the Cu–BTA interface alleviate the difficulty of electron hopping through multistage transition. Therefore, MW can excite Cu–BTA to produce free electrons. Subsequently, Au nanoparticles rapidly increase electron transfer and inhibit electron–hole recombination. Hence, the yields of reactive oxygen species can be enhanced for MW dynamic therapy. Consequently, under 10 min of MW irradiation, Au/Cu–BTA killed 99.998% ± 0.001% of Gram-positive Staphylococcus aureus , 99.966% ± 0.014% of methicillin-resistant Staphylococcus aureus , and 96.871% ± 0.831% of Gram-negative Pseudomonas aeruginosa . The effective MW bacteria-killing strategy designed in this study shows significant potential for application in the MW-responsive treatment of deep tissue infections without antibiotics. Graphical Abstract
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LANGMUIR
·
2025
·
IF 3.9
Guoping Wang,Tian Tang,Ruichen Liu,Jingwen Li,Yi Xu,Sen Liao
By utilizing carboxylated multiwalled carbon nanotubes (MWCNT-COOH) to strengthen the interaction between the electrode and the analytes and improve the conductivity of the composite material and in conjunction with the superior catalytic properties of copper-based metal–organic framework (MOFs), a novel electrochemical sensor was fabricated from a Cu-MOF/MWCNT-COOH composite, specifically designed for the simultaneous and distinct detection of ascorbic acid (AA) and dopamine (DA). Electrochemical analyses were conducted on the innovative Cu-MOF/MWCNT-COOH electrode through both CV and DPV, revealing unique electrochemical behaviors for AA and DA. The sensor not only showed exceptional electrocatalytic properties but also distinguished itself by its broad dynamic response ranges, covering concentrations from 3 to 1800 μM for AA and from 2 to 180 μM for DA, with detection limits (S/N = 3) of 3.00 μM for AA and 0.32 μM for DA. Furthermore, this electrochemical detection platform exhibited robust reproducibility and selectivity. Examinations of serum samples yielded the recovery rates of AA and DA which were 101.9% and 102.1%, respectively, confirming the sensor’s capability to perform reliably under varied biological conditions. The findings confirm the sensor’s potential of the proposed method for the simultaneous, sensitive, and reliable detection of AA and DA. In conclusion, the electrochemical sensor has a promising potential for practical applications.
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Catalysis Science & Technology
·
2024
·
IF 4.4
Kai Cui,Jiaming Yang,Yuli Jing,Junwen Chen,Chen Zhao,Peng Wu,Xiaohong Li
Sustainability issues have led to a gradual market expansion for the 1,4-butanediol (BDO) monomer of the biodegradable plastics to replace conventional plastics. Maleic anhydride (MA) can be derived from the oxidation of bio-based furfural or fructose. Although the hydrogenation of MA can produce a series of products, including succinic anhydride (SA), γ-butyrolactone (GBL), BDO and tetrahydrofuran (THF), the one-pot deep hydrogenation of MA to BDO or THF under mild conditions has been rarely reported in the literature until now. Herein, we report the production of BDO from the one-pot deep hydrogenation of MA over a Cu–0.03Mo/SiO2 catalyst, achieving 100% MA conversion and 88.3% BDO yield. The Cu–0.03Mo/SiO2 catalyst also showed good long-term stability without obvious loss in activity or BDO selectivity during a 160 h time-on-stream test. Doping Mo to Cu/SiO2 catalysts in an optimal amount adjusted the distribution of Cu0/Cu+ species and modulated the interaction of Cu–SiO2 and surface acidity, so that the activation of hydrogen, MA and relevant intermediates can become balanced, in addition to the restriction of side-reactions. This study provides potential for the green synthesis of BDO with non-precious Cu-based catalysts.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Wei Wei,Zhenyao Li,Jitao Shang,Chenxi Xia,Xuli Hu,Yangshun Hu,Junchen Xu,Yan Zhao,Mingyue Ding
The selective electrochemical reduction of CO to valuable multi-carbon (C 2 + ) products is a key strategy for mitigating global warming and addressing the energy crisis. Nevertheless, the activity and selectivity of CO-to-C 2+ products conversion remain low due to the lack of effective catalysts. In this study, bimetallic CuPd was grown in situ on Cu nanoparticles via a seed-mediated approach, constructing a stable CuPd/Cu interface for the CO reduction reaction (CORR). The CuPd alloy promotes CO adsorption and hydrogenation, resulting in abundant and stable *COH intermediates over catalytic sites. Consequently, a stable asymmetric coupling is established at the CuPd/Cu interface, lowering the reaction energy barrier and facilitating C-C coupling. A high acetate selectivity of 49 % was achieved at –1.0 V versus the reversible hydrogen electrode (RHE) with a current density of 349 mA/cm². This study highlights the critical role of constructing CuPd/Cu asymmetric sites for C–C coupling, paving the way for designing highly selective catalysts that enhance C 2+ product formation and acetate production.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Jun Zhang,Yimeng Cao,Fang Chen,Mengdie Cai,Jia-qi Bai,Jiawei Xue,Jingshuai Chen,Chang-Jie Mao,Song Sun
Cocatalysts play a pivotal role in enhancing the efficiency of photocatalytic water splitting. In this study, we introduced a novel and straightforward pre-impregnation strategy to anchor a CuNi dual cocatalyst onto the surface of Al-doped SrTiO 3 (Al-STO), coupled with photodeposition. This approach led to a remarkable 11.07-fold (77.5 µmol/h) increase in hydrogen evolution performance compared to the conventional photodeposition method for decorating with CuNi dual cocatalysts. Not only that, after the 18 h cycle experiment, the catalyst still maintains high activity and high stability similar to that of precious metals, which overcomes the defects of poor stability and short life of non-precious metals. This strategy capitalizes on the pre-adsorption of cocatalyst precursor ions on the Al-STO support via impregnation, enhancing both the adsorption energy and capacity between the precursor ions and the active sites. Detailed characterizations have revealed a strong electronic interaction within the Cu-Ni structure and improved interfacial coupling between CuNi and Al-STO. This not only significantly promotes charge separation and transfer but also provides a plethora of active sites for the photocatalytic generation of H 2 . Moreover, extensive theoretical calculations have provided deep insights into the reaction mechanism of the CuNi system and elucidated the reasons behind the varying degrees of activity enhancement across different cocatalyst architectural systems.
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Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 25
·15082-15089
·
IF 10.7
Zongmiao Li,Zhu Liu,Shiju Li,Yuhou Pei,Di Li,Jiale Mao,Rong Zhou,Chuntian Qiu,Yingying Lu,Bing Zhang
Electrochemical conversion of carbon dioxide (CO2RR) into high-value multi-carbon (C2+) chemicals and fuels is of great significance for carbon neutrality, and so far Cu-based materials are still the dominant electrocatalysts with practical application potential for C2+ products during the CO2RR. However, Cu-based catalysts usually face problems such as an unstable valence state and lattice structure, low efficiency, and a narrow potential window for C2+ products which affect the comprehensive performance of the catalysts. Herein, we develop a simple co-precipitation-hydrothermal method for introducing zirconium dioxide (ZrO2) into copper oxide (CuO) to improve the selectivity of C2+ products via in situ reconstruction. The optimized CuO–ZrO2-1.0 catalyst exhibits a high faradaic efficiency of 82.3% for C2+ products with an industrial partial current density over 200 mA cm−2, which presents a more than 1.7-fold improvement compared to that of CuO, also exceeding that of lots of Cu-based catalysts previously reported. DFT and in situ characterization studies reveal that the introduction of ZrO2 can induce the electronic distribution and stabilize the Cu+ species during the in situ reconstruction process which contributes to moderate adsorption and enhanced coupling of *CO intermediates to obtain C2+ products.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Haorui Wang,Haodan Xu,Wei Cheng,Yinwen Luo,Tao Zhang,Jun Ma
Iodinated contrast media compounds (ICMs) are intensively applied in medical diagnostic radiology and have received wide environmental concerns due to formation potential of iodinated disinfection byproducts. Conventional water/wastewater treatment processes cannot effectively remove ICMs; reducing their total organic iodine concentration is even more difficult. The source control or elimination of ICMs thus becomes necessary. We report here that the refractory ICMs (5 μM) can be efficiently deiodinated by ascorbate/ascorbic acid (AA) (200 μM) coupled with a trace amount of Cu(II) (5 μM) through catalytic reduction but not oxidation, contrary to the conventional concept of AA/Cu(II) coupling, which produces reactive oxygen species. Taking diatrizoate (DTZ, a refractory ICM) as an example, the coupling completely deiodinated DTZ without destroying its molecular structure. High-performance liquid chromatography inductively coupled plasma mass spectrometry analysis revealed that ternary complexes form between Cu(II), ascorbate, and the anilide moiety of DTZ. Cu(II) in the ternary complex works as an efficient electron-transfer shuttle to convey electrons from ascorbate to the target compound, inducing sequential and complete deiodination. Both DTZ and the nonionic ICMs can be effectively deiodinated even in human urine. Thus, AA coupled with trace Cu(II) could be potentially useful for the source elimination of organic iodine of ICMs.
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ACS Nano
·
2025
·
IF 16
Shikang Jiang,Yuqiu Wang,Hao Ge,Binkai Yu,Ting Wang,Tong Wang,Hanlin Wang,Xianlin Qu,Huatong Zuo,Zhengwei Zhao,Limin Zhou,Weibo Hua,Mingzhe Chen,Hui Xia
Na4Fe3(PO4)2(P2O7) (NFPP) is currently receiving a lot of attention, as it combines the advantages of NaFePO4 and Na2FeP2O7 in terms of cost, energy density, and cycle stability. However, the issues of intrinsic poor electronic conductivity and difficult high-purity preparation may impede its practical application. Herein, the pivotal role of Cu doping in strengthening the polyanion structure and improving its electrochemical properties is comprehensively investigated. It is found that trace Cu doping not only expands the lattice volume of NFPP but also suppresses the formation of the inactive NaFePO4 impurity phase. In addition, Cu doping can effectively reduce the structural variations of NFPP during sodiation/desodiation processes (2.02%) while decreasing the band gap and lowering the ion mobility energy barrier (from 0.46 to 0.426 eV). Consequently, the Cu-doped NFPP electrode exhibits superior rate capability and long-term cycling performance. The computational simulations reveal a strong electronic interaction between Fe and Cu that tunes the electron localization and distribution, and additional Na+ transport channels can be created in NFPP by distorting the [PO4] units adjacent to the doping site, which provides a reference to enhance the performance of NFPP and reveals the great application potential of NFPP materials.
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Nano Today
·
2024
·
IF 13.2
Xue Wang,Lili Xia,Hui Cheng,Kexing Li,Wei Feng,Xinyue Dai,Yu Chen
Reactive oxygen species (ROS) can induce oxidative damage to biomolecules within tumor cells, making them suitable for tumor therapy. However, the effectiveness of these ROS in treating tumor cells is restricted due to their short half-life or short diffusion distance. Sulfate radicals (SO 4 • – ), with a longer half-life and higher oxidation potential , provide a compelling alternative. Herein, we propose an efficient strategy to activate peroxymonosulfate (PMS) and produce SO 4 • – and •OH by using ultrasound-mediated Cu 2+ /Cu + redox cycling, enabling oxygen-independent synergistic tumor therapy. Notably, this redox cycle ensures the continuity of effective Cu + catalytic sites and prevents adverse effects on healthy tissues. The density functional theory results demonstrate that the decisive copper valence-conversion step is derived from the ultrasound-induced excitations of electrons in spin-down bands of Cu 2 (OH)PO 4 . This ultrasound-controlled transition metal valence alteration enables in-situ activation of a nontoxic drug to produce toxic reactive X (X = O/S) species in an O 2 -independent manner, offering an efficient, adaptable and universal methodology for treating hypoxic tumors in living systems.
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