TALANTA
·
2025
·
IF 6.1
Jiahui Huang,Siyi Wei,Maopu Tu,Weiqi Deng,Le Zhong,Fan Jiang,Zhixin Li,Ray P.S. Han,Xiaoyu Deng,Shaohua Xu,Yingzhou Tao
The measurement of total antioxidant capacity (TAC) is vital for evaluating the nutrient content of foods and beverages. The development of novel mimetic enzyme materials with high catalytic activity has led to the creation of highly sensitive methods for TAC assessment. In this study, we introduce a simple and efficient approach for preparing uniformly distributed Cu 2 O/Cu nanoparticles supported on graphite-phase carbon (g-C@Cu 2 O/Cu NPs). These g-C@Cu 2 O/Cu NPs demonstrate excellent peroxidase-like (POD-like) enzymatic activity and exhibit a strong binding affinity for TMB, with a K m value of 0.24 mM. A colorimetric analytical platform for TAC assessment was developed, utilizing g-C@Cu 2 O/Cu NPs, TMB, and H 2 O 2 as the chromogenic system. The method achieved a limit of detection for ascorbic acid as low as 0.15 μM, with a linear range from 0.5 to 100 μM. Furthermore, this method was successfully applied to evaluate TAC in real samples, highlighting its significant potential for food nutritional analysis.
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MATERIALS LETTERS
·
2025
·
IF 2.7
Xiaojiao Yu,Yi Wang,Long Li,Jin Wang,Dun Zhang
To enhance the bactericidal efficacy of TiO 2 /Cu 2 O composite coatings and mitigate the issue of ongoing oxidation, we introduced different sizes of spherical silica as supporting materials, combined with TiO 2 /Cu 2 O, to develop a novel antibacterial, antioxidant photocatalytic system. The synthesized ST and STC samples underwent comprehensive characterization using transmission electron microscopy. Subsequent analyses employing X-ray diffraction and UV–Vis diffuse reflectance systematically validated the preserved structural integrity and enhanced photochemical stability of the developed materials. The introduction of silica spheres not only significantly increased the specific surface areas of TiO 2 and Cu 2 O, thereby enhancing their interfacial contact, but also promoted efficient charge separation of photogenerated electrons and holes. Furthermore, this approach reduced the required amount of TiO 2 and Cu 2 O, leading to cost savings. These advantages make the developed coating highly suitable for industrial-scale sterilization applications.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 6
·1-9
·
IF 6.232
Li Xiaomeng,Kong Weisu,Qin Xia,Qu Fengli,Lu Limin
A facile and sensitive self-powered cathodic photoelectrochemical (PEC) aptasensor is reported for the detection of prostate-specific antigen (PSA) based on CuO-Cu 2 O nanowire array grown on Cu mesh (CuO-Cu 2 O NWA/CM) as electrode. The mixed narrow band gaps of the CuO-Cu 2 O heterostructure ensured its wide absorption band, effective electron/hole separation, and high photocatalytic activity in the visible region. In addition, nanowires directly grown on the substrate provided high specific surface area and exposed abundant active sites, thus guaranteeing its high photocatalytic efficiency. Therefore, the self-powered sensor exhibited favorable analytical performance with fast response, wide linear ranges of 0.01 to 5 ng/mL and 5 to 100 ng/mL, an acceptable detection limit of 3 pg/mL, and reasonable selectivity and stability. The proposed CuO-Cu 2 O NWA/CM can be considered a promising visible light-responsive photoactive material for fabrication of PEC aptasensor with high performance.
a Schematic illustration of construction process of PEC sensing platform based on the CuO-Cu 2 O composite for PSA detection. b Schematic mechanism of the operating PEC system.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Ling Li,Longcheng Zhang,Lichen Gou,Siqi Wei,Xiandeng Hou,Li Wu
Electrocatalytic methanol oxidation reaction (MOR) is a promising alternative approach to oxygen evolution reaction for efficient hydrogen production. However, developing highly efficient and cost-effective MOR catalysts, coupled with the cathodic hydrogen evolution reaction, is still a challenge. Herein, we used a Ni 2 P nanosheet array with Cu 2 O-Cu dendrites on nickel foam (Cu 2 O-Cu@Ni 2 P/NF) as an efficient and stable electrocatalyst for MOR, which attained a low potential of 1.41 V at 100 mA cm −2 and a small Tafel slope of 44.99 mV dec –1 with excellent stability for at least 24 h in 1.0 M KOH solution with 1.0 M methanol. In situ Raman spectroscopy reveals that Cu 2 O-Cu promotes the generation of the β-NiOOH active phase, and converts to Cu(II)O under the electrolysis conditions. Furthermore, the methanol electrolysis cell utilizing Cu 2 O-Cu@Ni 2 P/NF as both the cathode and anode delivered a current density of 10 mA cm −2 at a low cell voltage of 1.40 V, and the cell voltage decreased by 210 mV at a current density of 100 mA cm −2 compared to water electrolysis. This work provides a new strategy to design the promising Ni-based phosphide as a bifunctional electrocatalyst in methanol electrolysis, enabling energy-saving H 2 production.
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Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 35
·18302-18309
·
IF 11.301
Da Li,Tongtong Liu,Linlin Huang,Jing Wu,Jiannan Li,Liang Zhen,Yujie Feng
The electrochemical conversion of CO2 into fuels and chemicals attracts worldwide attention for tackling global warming and energy crises. However, the efficiencies and selectivities for targeted products such as formate are still far from satisfactory. Herein, core–shell structured Cu2O/Cu@C immobilized on nitrogen-doped graphene sheets (Cu2O/Cu@C/NG) is prepared and used for CO2 reduction. Cu2O/Cu@C/NG yields higher activity towards formate in terms of a lower onset potential (−0.38 V versus RHE) and higher faradaic efficiency (82.1 ± 1.2%), as well as stable performance over 30 h. The enhancements in selectivity and activity are attributed to the synergistic effects between Cu sites and N doping, simultaneously improving CO2 adsorption and the interfacial charge transfer process. Additionally, N doping restrains hydrogen evolution on the copper sites, leaving more available sites for CO2 reduction. This study provides an efficient strategy to increase the activities of electrocatalysts for CO2-to-formate electroreduction.
研究领域:
材料科学
·
环境科学
·
化学工程
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Yahui Zhang,Jing Wang,Yongping Dong
In the present work, the nanosheets of iridium complex (Ir NS) were synthesized by surfactant assisted reprecipitation method. Strong anodic ECL signal of Ir NS was obtained under neutral aqueous condition with electrogenerated hydroxyl radical as coreactant, without the need of additional coreactant. Excellent light absorption ability of gold nanoparticles decorated Cu 2 O cubic nanoparticles (Cu 2 O@Au) could apparently inhibit the ECL intensity of Ir NS. When Cu 2 O@Au was assembled onto the electrode surface by base pair complementarity of DNA, the ECL resonance energy transfer (ECL-RET) system could be fabricated with Ir NS ECL as energy donor and Cu 2 O@Au as energy acceptor. The specific interaction of lincomycin (LIN) with the aptamer could release Cu 2 O@Au from the electrode surface, resulting in the recovery of ECL signal. Based on this, an “off-on” mode ECL sensor was designed to detect LIN. Under the optimal condition, the ECL intensity changed linearly with the logarithm of LIN concentration in the range of 1.0 × 10 −11 –1.0 × 10 −6 mol L −1 with a detection limit of 2.88 × 10 −13 mol L −1 . Importantly, the proposed ECL sensor showed outstanding accuracy and specificity in the detection of LIN, and provided a potential strategy for the determination of antibiotic.
研究领域:
分析化学
·
生物传感器
·
纳米技术
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Ze-Peng Bai,Ruoxi Zhang,Zi-Ying Xu,Hua Zou,Jie-Xin Wang
Heterogeneous catalyst-mediated photocatalysis is widely acknowledged as a highly promising approach for the efficient degradation of persistent antibiotics in water. In this study, a hydrophilic Cu2O/polyacrylonitrile (PAN) porous nanofiber membrane was synthesized by the electrospinning technique combined with a convenient poly(ethylene glycol) (PEG)-assisted template-removal method for photocatalytic degradation of tetracycline (TC). The Cu2O/PAN porous nanofibers (NFs) exhibited excellent photocatalytic degradation activity under visible-light irradiation, with degradation efficiencies and kinetic constants that were approximately 1.55-fold and 2.35-fold higher than those of nonporous Cu2O/PAN NFs, respectively. This enhancement resulted from a greater exposure of active components and a more hydrophilic fiber structure. Moreover, this composite fiber demonstrated exceptional stability, still maintaining a TC degradation rate of over 95% even after eight cycles, effectively addressing the instability and poor recyclability issues of Cu2O nanoparticles (NPs). In addition, this multifunctional nanofiber exhibited outstanding antibacterial activity against S. aureus and E. coli, achieving over 99% bacterial inhibition with a minimal nanofiber dosage under dark conditions. This work provides profound insights into the rational design and scalable fabrication of the porous multifunctional nanofiber membranes, thereby laying a solid foundation for the practical applications in water purification and antimicrobial materials.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 5
·e70581
·
IF 4.3
Wenjing Song,Zhenhao Xiao,Shuo Yan,Jie Li,Weizuo Li,Haiqun Chen
The chemical fixation of carbon dioxide (CO 2 ) into value-added cyclic carbonates is a promising pathway for carbon utilization; however, developing heterogeneous catalysts with high activity and stability remains a challenge. In this study, a Cu–Mg-MOF-74 precursor was synthesized via a solvothermal method and subsequently transformed into a Cu–Cu 2 O–MgO/C nanocomposite catalyst through a one-step pyrolysis process under N 2 atmosphere at 550°C. The pyrolysis process leads to the collapse of the MOF crystal structure and the formation of highly dispersed Cu–Cu 2 O–MgO nanoparticles embedded in a carbon matrix, while the overall morphology inherited from the MOF precursor remains largely preserved. Detailed characterization (XRD, XPS, TEM, BET, and in situ DRIFTS) reveals that the catalyst possesses a high specific surface area (296.7 m 2 ·g −1 ), abundant Lewis acid sites (Cu, Cu 2 O, and MgO), and surface oxygen-containing groups, which synergistically enhance catalytic performance. Under relatively moderate conditions (90°C, 0.7 MPa, CO 2 , 7 h), the Cu–Cu 2 O–MgO/C catalyst achieved a styrene oxide conversion of 94% with 99% selectivity, significantly outperforming its monometallic and physical mixture counterparts. Furthermore, the catalyst demonstrated excellent substrate versatility and robust recyclability over five consecutive runs without structural collapse. This work provides a facile strategy for fabricating robust MOF-derived carbon-based catalysts for sustainable CO 2 conversion.
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TALANTA
·
2025
·
IF 6.1
Boya Ma,Wenshi Zhao,Yu Wu,Xiangyue Wan,Hang Zhao,Yongdan Wang,Jihui Lang,Jinying Li,Yang Liu
Tetracycline (TC), a widely used broad-spectrum antibiotic for treating bacterial infections, poses significant risks to human health and ecological environments caused by extensive abuse. Hence, sensitive detection and efficient degradation of TC are crucial for protecting both human health and ecological environment. In this work, a multifunctional Z-scheme Cu 2 O@Ag/g-C 3 N 4 heterojunction was designed and constructed in order to achieve both ultrasensitive surface-enhanced Raman scattering (SERS) detection and efficient photocatalytic degradation of TC. The influence of the Ag content on the SERS performance was investigated using the finite-difference time-domain (FDTD) method. The charge transfer (CT) mechanism was deduced by band gap and Fermi level calculations. The results showed that the synergistic effect of electromagnetic enhancement (EM) and chemical enhancement (CE) contributed to the excellent SERS sensitivity of Cu 2 O@Ag/g-C 3 N 4 nanocomposites (NCs). The limit of detection (LOD) for TC using Cu 2 O@Ag/g-C 3 N 4 NCs as SERS substrate was as low as 10 −12 M, and the SERS substrate could also be used to TC detection in real milk samples. In addition, Cu 2 O@Ag/g-C 3 N 4 NCs could also act as the efficient photocatalyst to achieve the removal of TC with degradation rate of 94 % under visible light irradiation. Especially, the Cu 2 O@Ag/g-C 3 N 4 NCs maintained excellent photocatalytic performance even after six cycles. Possible degradation pathways and photocatalytic degradation mechanism of TC catalyzed by Cu 2 O@Ag/g-C 3 N 4 NCs were also proposed. This multifunctional Z-scheme Cu 2 O@Ag/g-C 3 N 4 NCs should thus have great potential for the integration of ultrasensitive SERS detection and efficient degradation of antibiotics.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Yaoting Wang,Kezhen Tian,Hao Yu,Wenjing Jiang,Zhaoquan Wen,Fujun Yin,Hong Zhao
A novel Cu-Cu 2 O/MnPtPd composite with enhanced peroxidase-like activity was synthesized and evaluated for colorimetric ampicillin (AMP) detection. The composite was prepared through in situ growth of Cu 2 O on a Mn-based substrate, followed by Pt and Pd nanoparticle incorporation to synergistically modulate its structural and electronic properties. This design markedly improved the catalytic decomposition of H 2 O 2 and the subsequent oxidation of 3,3′,5,5′-tetramethylbenzidine. The Cu + /Cu 2+ redox cycle dominates the catalytic process, while the synergistic interactions among Cu, Mn, Pt, and Pd promote H 2 O 2 activation to generate •O 2 − , identified as the primary reactive species driving the colorimetric reaction. Steady-state kinetics demonstrated high affinity and catalytic efficiency toward both H 2 O 2 and TMB, surpassing natural horseradish peroxidase. Based on this nanozyme, an enzyme-free colorimetric sensing platform for AMP was established, which exhibits a dual linear response in both low concentration range (0.05–100 μg/mL) and high concentration range (100–300 μg/mL), with a low detection limit of 14.5 ng/mL. The sensor showed excellent selectivity and anti-interference capability. Recoveries for AMP in real water samples ranged from 96.34% to 103.3% with RSD below 4.31%. These results demonstrate that the Cu-Cu 2 O/MnPtPd nanozyme provides a stable, low-cost, and high-performance alternative for non-enzymatic AMP detection in environmental and food monitoring.
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RSC Advances
·
2014
·Vol. 4
·期 58
·30610-30616
·
IF 3.708
Jingchao Zhu,Yang Shang,Xiaobo Sun,Lin Guo
In this work, one-dimensional, monodispersed prism-like Cu2O nanorods with a significantly high aspect ratio (∼100) have been successfully prepared by a simple hydrothermal synthesis with the assistance of ethylene glycol (EG). The obtained nanorods expose {100} faces and have a rectangular cross section. Their length, thickness and width are in the range of 50–100 μm, 0.5–1 μm and 0.5–1.5 μm, respectively. Pyrrole (Py) and EG play important roles in the formation of the prism-like nanorods. Py acts as a structure-directing reagent that makes the Cu2O crystal grow along the [100] direction. EG acts as a “bridge” that controls the “hand-in-hand” growth of the intermediate Cu2O nanowires and transforms them into prism-like nanorods. The products are first employed as thermal conductive nanofillers to improve the thermal conductivity of poly(vinylidene fluoride) (PVDF)-based polymer composites. The original thermal conductivity studies indicate that the rod-type structural nanomaterials are very efficient fillers for polymer composites. When they were embedded in the PVDF matrix at 30 wt%, the Cu2O nanorods show a thermal conductivity enhancement (TCE) of 275% when compared with the pristine PVDF, which is 1.4 times higher than commercial Cu2O (cubes) used as fillers in PVDF composites.
研究领域:
材料科学
·
纳米技术
·
热工工程
·
聚合物复合材料
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POLYHEDRON
·
2026
·
IF 2.8
Nan Wang,Lei Chen,Wanhe Du,Keying Zhu,Bingyu Zhang,Shengwen Chen,Zhiguo Sun,Jifen Wang
A novel Z -scheme CuWO 4 /Cu/Cu 2 O ternary heterojunction photocatalyst was successfully synthesized via a solvothermal approach, featuring the low-cost metallic copper (Cu) as an efficient electron mediator. This unique structure was designed to enhance Cu 2 O visible light capture capability and accelerate photogenerated charge separation, thereby efficiently degrading the recalcitrant antibiotic Rifampicin (RFP). Comprehensive characterizations (XRD, XPS, SEM, EDS) confirmed the successful construction of the heterojunction, where CuWO 4 and Cu particles are integrated onto the surface of the Cu 2 O. Compared to individual components and binary composites, the optimized CuWO 4 /Cu/Cu 2 O sample demonstrated significantly superior photocatalytic activity, achieving an impressive 88.0% RFP degradation rate within 80 min under visible light. The enhanced performance is primarily ascribed to the successful formation of a Z -scheme charge transfer pathway, where the localized surface plasmon resonance (LSPR) effect of the metallic Cu mediator promotes carrier migration, thereby improving both carrier separation efficiency and redox capacity. Kinetic analysis confirmed a degradation rate constant ( k ) of 0.02743 min −1 , approximately 2.8 times higher than that of pure Cu 2 O. Furthermore, the composite exhibited excellent stability, maintaining a degradation rate above 80% after five recycling runs and demonstrating robust performance across a broad pH range (3.0–7.0). Based on active species trapping and band structure analysis, a Z -scheme mechanism was proposed, highlighting O 2 − as the dominant active species. This study provides a facile and low-cost strategy for constructing highly efficient LSPR-enhanced Z -scheme photocatalysts for environmental remediation.
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