CATALYSIS LETTERS
·
2019
·Vol. 150
·期 3
·815-825
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IF 2.372
Huang Yan-Feng,Zhang Lu,Ma Li,Li Ying,Zhong Chongli
Abstract Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites were achieved using nanoparticle-encapsulated MOFs Fe 3 O 4 @HKUST-1 as both a precursor and a self-sacrificing template. Fe 3 O 4 @HKUST-1 was thermally converted into magnetic Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites in different atmosphere (N 2 and air). The resulting composites not only kept superparamagnetic characteristics, but also exhibited improved peroxidase-like catalytic activity and high stability when compared to the precursor Fe 3 O 4 @HKUST-1. The morphology, crystal structure, magnetic and porous properties of Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites were characterized, and the kinetics parameters and the influence factors on the peroxidase-mimicking activity such as temperature, pH and H 2 O 2 concentration were evaluated. On account of the excellent peroxidase-like activity, the as-prepared Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites were successfully used for the catalytic removal of methylene blue (MB) dye with H 2 O 2 oxidant. This work provides an effective way to fabricate highly reactive MOFs-derived biomimetic catalysts, which have potential applications in bioassays and pollutant degradation. Graphic Abstract Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites were achieved using Fe 3 O 4 nanoparticle-encapsulated HKUST-1 as self-sacrificial templates and demonstrated excellent peroxidase-like activity.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 14
·11143-11153
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IF 2.779
Zhang Jianjiao,Wang Hongyang,Wang Qizhao,Sun Zhijie,Buhe Bateer,Sun Yuantao,Meng Changhao
It is a great challenge to find the electrode of supercapacitor with a high rate and long cycle life. Based on the excellent electrical conductivity of graphene, spindle-like CuO-graphene nanocomposites were prepared by one-step hydrolysis process and then a self-supporting flexible electrodes were prepared by ultrasonic dispersion combined with filtration technology. Among them, graphene with layered structure not only builds a solid framework but also ensures a fast electron transport path. Ion transport is also facilitated by the linked macroporous structure. In addition, small CuO nanoparticles have short transmission paths and fast pseudo-capacitance storage capacity. Therefore, the CuO-graphene self-supporting electrode has 93.1% capacitor retention after 4000 cycles at 4 A g −1 with ultra-long cycle life, a high mass specific capacity of 170 F g −1 at 0.5 A g −1 , and relative high-rate performance of 153 F g −1 at 5 A g −1 , which show its good prospects for future applications.
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VACUUM
·
2024
·
IF 3.8
Hailin Zheng,Min Zheng,Xianxing Huang,Mingjie Liang,Kang Li
Chemical-looping combustion (CLC) technology is considered a promising combustion method with inherent CO 2 capture. In this study, the sol-gel method and combustion synthesis were employed to produce precursor materials (P) of CuO-based oxygen carriers (OCs). The effects of vacuum drying conditions on both NO x emissions from precursor combustion and oxygen carrier cycle reaction characteristics were investigated. Vacuum-dried precursors emitted less NO x during the precursor calcination process. At a heating rate of 1 °C/min, the vacuum-dried precursors exhibited an average reduction of 24.13 % in NO x emissions compared with those prepared through atmospheric pressure drying. An increased amount of Cu 2 (OH) 3 NO 3 in the precursor results in greater heat release during the self-propagating high-temperature combustion synthesis used to synthesize the oxygen carrier. Furthermore, the complete combustion of the nitrogen-containing precursor leads to a reduction in the emission of NO x . CuO-based OCs exhibited stable redox reactions over 10 cycles. Vacuum drying enhanced CH 4 conversion and CO 2 yield of OC1 by 14.04 % and 13.21 %, respectively, compared to atmospheric pressure drying. The results indicate that the CuO-based OCs obtained through vacuum-dried significantly enhance redox properties. This study shows that vacuum-dried reduces NO x emissions from nitrogen precursors and enhances the cyclic efficiency of OCs from precursor combustion.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Dongsheng Fu,Yuanzheng Ding,Ruijie Guo,Jie Zhang,Huifang Wang,Baolong Niu,Hong Yan
ZIF-8, a subclass of metal organic frameworks (MOFs), was employed as the CuO carriers because of its high surface areas and good dispersibility. A novel antibacterial agent CuO@ZIF-8 was synthesized by environmentally-friendly direct calcination strategy, and introduced into the composite double-layer films for packing materials. The double-layer films were prepared via solution casting method with polylactic acid (PLA) and polyvinyl alcohol (PVA)-quaternary ammonium chitosan as the matrix of outer layer and inner layer, respectively; and CuO@ZIF-8 nanoparticles were introduced into the PVA-quaternary ammonium chitosan layer. The double-layer films exhibited superior antibacterial activity resulted from the uniform dispersion of CuO by ZIF-8 carriers. The elongation at break was enhanced and up to 17.13%, about 2.4-fold that of PLA films. Meanwhile, the films provided low water vapor permeability and strong UV-barrier ability which were attributed to the lay-by-layer casting, CuO@ZIF-8 doping and TiO 2 addition. Cherry tomato preservation experiment revealed that the composite films retarded the growth of harmful microorganisms on the fruit surface. MTT assay confirmed the cytocompatibility of the films. The easily fabricated double-layer films presented potential possibility in the field of biodegradable food packaging.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2024
·
IF 6.2
Yang Liu,Xia Wang,Bo Pan,Zhuo Wei,Jing Zhao,Hao Qiu,Christian E.W. Steinberg,Willie J.G.M. Peijnenburg,Martina G. Vijver
A suspension of copper oxide nanoparticles (CuO NPs) is a mixture of dissolved and particulate Cu, the relative proportions of which highly depend on the water chemistry. However, the relationship between different proportions of particulate and dissolved Cu and the overall toxicity of CuO NPs is still unknown. This study investigated the response of Chlorella vulgaris to CuO NPs at varying solution pH and at different tannic acid (TA) additions, with a focus on exploring whether and how dissolved and particulate Cu contribute to the overall toxicity of CuO NPs. The results of the exposure experiments demonstrated the involvement of both dissolved and particulate Cu in inducing toxicity of CuO NPs, and the inhibition of CuO NPs on cell density of Chlorella vulgaris was found to be significantly ( p < 0.05) alleviated with increased levels of TA and pH (< 8). Using the independent action model, the contribution to toxicity of particulate Cu was found to be enhanced with increasing pH values and TA concentrations. The toxic unit indicator better ( R 2 = 0.86, p < 0.001) explained impacts of CuO NPs on micro-algae cells than commonly used mass concentrations ( R 2 = 0.27–0.77, p < 0.05) across different levels of pH and TA. Overall, our study provides an additivity-based method to improve the accuracy of toxicity prediction through including contributions to toxicity of both dissolved and particulate Cu and through eliminating the uneven distribution of data due to large variations in total Cu, particulate Cu, dissolved Cu, Cu 2+ activities, Cu-TA complexes and other Cu-complexes concentrations with varying water chemistry conditions.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Zilong Liang,Ping Zhang,Zhiwei Luo,Haijun Zhang,Qian Zhao,Yuchun Zhang
Driven by the urgent demand for efficient CO elimination from fire-derived toxic smoke, CuO coupled with a redox-active CeO₂ support and La promoter has attracted attention as a robust and low-cost composite-oxide catalyst for CO oxidation under harsh conditions. In this study , the effect of La/Ce molar ratios and doping strategies on the structure and catalytic properties of metal-organic framework (MOF)-derived catalysts were systematically investigated, aiming to construct dual-metal synergistic systems with boosted CO oxidation efficiency. By precisely regulating synthesis parameters (temperature, solvent, and precursor concentration), MOF-derived catalysts with tailored crystal frameworks, hierarchical pore structures, and optimized surface chemistry were successfully fabricated. The physicochemical properties and catalytic behaviors were correlated via complementary characterizations, including X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations were combined to reveal the intrinsic catalytic mechanisms. This integrated strategy clarified how dual-metal synergy governs CO adsorption, activation, and conversion over a broad temperature range. Ultimately, this work provides a rational design strategy for high-performance CO oxidation catalysts and highlights the potential of La-doped MOF-derived CeO₂/CuO catalysts for fire-smoke purification.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2026
·
IF 4.1
Liu Jianhui,Han Zhongxuan,Yang Zhanjun,Zhao Shuna,Li Mi,Xu Qiang
Nanocomposite thermite materials show great application potential in high-energy-consuming applications. However, significant challenges remain in precisely controlling their nanoscale microstructure and synergistically optimizing their combustion performance. Building upon the high oxidative potential of metal fluorides, using electrostatic spray technology, composite thermite particles were prepared with metal fluoride (CuF 2 ) and metal oxide (CuO) as oxidizers and polyvinylidene fluoride (PVDF) as a binder. Comparative samples were prepared by physical mixing. With the help of transmission electron microscope (TEM), scanning electron microscope (SEM), energy-dispersive spectrometer (EDS), X-ray diffractometer (XRD), simultaneous thermogravimetry–differential scanning calorimeter (TG-DSC), and combustion performance test system, the microstructure, thermal reaction kinetic traits, combustion performance parameters, energy release law, as well as the morphological traits and component structure of combustion products of the prepared composite materials were systematically characterized and analyzed. The research results show that, compared with physically mixed samples, the composite materials prepared by electrostatic spray form submicron-scale (nano-aluminum powder) and micron-scale structures (micron-aluminum powder) with uniformly dispersed reactants in a nearly spherical shape. This structure enhances interfacial contact, suppresses nanoparticle agglomeration, and promotes more efficient energy release and combustion heat utilization. These samples exhibit larger flame height and area, higher combustion temperature and produce condensed-phase products with a fragmented, porous morphology and fewer metallic residues, indicating more complete reactions. Notably, CuF 2 -containing thermites demonstrate significantly higher combustion intensity than conventional thermite formulations. In conclusion, developing high-performance fluorine-containing thermite materials holds considerable academic and practical value for advancing thermite technology.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Ying Chen,Kun Ge,Xing Liang Cheng,Yuling Hu
Cu@CuO@TCPP-Cu heterojunction with electronic bridge was fabricated. • Cu 2+ bridge boosts charge transfer and strengthens interfacial coupling in Cu@CuO@TCPP-Cu. • The heterojunction shows enhanced SERS performance and POD-like catalytic activity. • Dual-target strategies enable sensitive PAT and H 2 O 2 detection for food safety monitoring. Engineering heterojunctions with efficient carrier separation and interfacial charge transfer is crucial for high performance surface-enhanced Raman spectroscopy (SERS) and enzymatic catalytic activity. However, conventional asynchronous synthesized heterostructures suffer from insufficient interfacial contact, which severely restricts charge transfer kinetics and SERS/catalytic response. Here, we rationally engineer a novel flower-layered Cu@CuO@TCPP-Cu heterojunction mediated by an in situ formed “electron bridge” for high sensitivity sensing applications. A facile surface oxidation technique was employed to grow flower-like CuO in situ on a Cu foil, followed by surface-initiated encapsulation of two-dimensional MOF of TCPP-Cu through coordination between TCPP and Cu 2+ ions released from CuO. The dissociated Cu 2+ ions at the interface serve as an “electronic bridge” between CuO and TCPP-Cu, which drastically shortens the charge transfer distance and enhances interfacial coupling. This unique heterojunciton exhibits remarkable synergy in SERS signal enhancement and peroxidase (POD)-like catalytic activity, as confirmed by density functional theory (DFT) calculations. A robust solid-state SERS sensing chip was thereby constructed. Two distinct analytical strategies were subsequently established, including aptamer-mediated specific detection of patulin (PAT) and enzyme mimicking - amplified turn-on SERS assay for quantitative analysis of H 2 O 2 . The as-constructed sensing chip exhibits excellent analytical sensitivity and selectivity, achieving low limits of detection of 0.640 μg/L for PAT and 13.8 μg/L for H 2 O 2 , respectively. Furthermore, the chip successfully identified both analytes in complex food samples with high accuracy. This work provides a versatile engineering strategy for constructing high performance heterojunction toward advanced analytical and food safety applications. Herein, a novel flower-layered Cu@CuO@Cu-TCPP heterojunction is constructed via an electronic bridge strategy. The bridge-mediated interfacial electron transfer synergistically boots peroxidase-like catalytic activity and SERS performance. Integrating aptamer recognition with nanozyme amplified turn-on SERS sensing enables highly sensitive detection of PAT and H 2 O 2 , offering a universal heterojunction design paradigm and broadening applications in food safety monitoring. Download: Download high-res image (166KB) Download: Download full-size image
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Energetic Materials Frontiers
·
2025
·
IF 3.9
Xing-yang Cui,Jin-chao Ma,Shu-yue Xu,Ji-zhou Dong,Feng-li Bei,Chuan Xiao,Hua Qian
There is a growing interest in the development of metal-doped carbon nitrides due to their extensive applications in photocatalysis, organocatalysis, electrocatalysis, nanozymes, and biosensing technologies. Here a series of transition metal-doped carbon nitride nanocomposite has been developed utilizing a rapid combustion synthesis method. Comprehensive characterization of the samples was conducted utilizing techniques such as X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy-energy dispersion X-ray spectrometry, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller specific surface area measurement analysis. The catalytic effects of the composites were evaluated through TG and DSC analyses. Among the composite materials studied, PCN-0.50Cu with the unique bivalent state structure of copper (Cu(0) and CuO(II)) demonstrated the highest catalytic activity, resulting in a reduction of the peak decomposition temperature of ammonium perchlorate (AP) by 101.5°C, a decrease in the duration of thermal decomposition by 54.7%, and a reduction in activation energy by 141.5 kJ·mol -1 . Moreover, the incorporation of PCN-1.00Cu at a concentration of 2 wt.% resulted in a 45.47% enhancement in the combustion rate of HTPB-based solid propellant. The combustion synthesis of transition metal-doped carbon nitride nanocomposites constitutes an effective approach for the development of solid propellants catalysts and advances the potential applications of nanocomposites in high-energy solid propellant technologies.
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Journal of Energy Chemistry
·
2026
·
IF 15.6
Xingyang Wu,Yucui Xiang,Liyong Gan,Shuaijun Wang,Zhongkai Hao,Guo Qin Xu,John Hon Kay Yip
Selective solar-driven conversion of CO 2 into C 2 hydrocarbons under aqueous conditions is a promising route toward carbon neutrality. However, C 2 selectivity in water is severely constrained because the intrinsically slow C–C coupling requires sustained electron flux to build up coupling-relevant intermediates. This flux is readily depleted by the competing hydrogen evolution reaction and rapid carrier recombination. Here, we construct an in situ S-scheme heterojunction of CuO islands on two-dimensional (2D) N-TiO 2 (CuO/N-TiO 2 ) via a one-pot solvothermal strategy. The chemically anchored CuO islands on 2D N-TiO 2 nanosheets create a compact, coherent interface that facilitates interfacial charge transfer. Compared with an ex situ assembled counterpart, the in situ heterojunction shows more efficient S-scheme charge separation. In situ characterizations and theoretical calculations reveal that dynamically redox-cycling Cu 2+ /Cu + sites are beneficial for C 2 H 4 formation, with Cu + sites favoring *CO retention and Cu 2+ sites being more favorable for the subsequent asymmetric *CO–*CHO coupling step. Consequently, the as-prepared catalyst delivers 17.5 μmol g −1 ethylene in 4 h with 94.6% selectivity and robust cycling stability. This work establishes an in situ S-scheme heterojunction with oxide islands anchored on 2D nanosheets that integrates charge management with dynamic active sites for selective aqueous CO 2 -to-C 2 H 4 photoreduction. An in situ grown CuO-islands/2D N-TiO 2 S-scheme heterojunction promotes charge separation for aqueous CO 2 -to-C 2 H 4 photoreduction without sacrificial agents. The dynamic Cu 2+ /Cu + active sites favor *CO formation, asymmetric *CO–*CHO coupling, and ethylene selectivity. Download: Download high-res image (161KB) Download: Download full-size image
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ACS Sensors
·
2026
·
IF 10.9
Zhao Kuo,Shi Yunbo,Niu Haodong,Liu Jinzhou,Yang Xiaohui,Tang Bolun
Real-time detection of hydrogen sulfide (H 2 S) and ammonia (NH 3 ) is important for occupational safety in humid, mixed-gas environments, yet conventional chemiresistive sensors remain limited by cross-sensitivity, humidity dependence, and poor portability at room temperature. Here, we report a flexible dual-channel sensor array coupled with a gated recurrent unit-convolutional neural network (GRU-CNN). A polythiophene/Cu-MOF-derived CuO composite (PTh/CuO) targets H 2 S through sulfur-affinitive CuO surface sites, whereas a polyaniline/Ti 3 C 2 T x MXene composite (PANI/MXene) targets NH 3 through PANI deprotonation and interfacial charge modulation. At 25 ± 1 ° C, the optimized PTh/CuO and PANI/MXene channels exhibited responses of 87.5% to 100 ppm H 2 S and 189% to 100 ppm NH 3 , respectively, together with linear responses over 1−10 ppm ( R 2 = 0.997 and 0.998) and theoretical limits of detection of 73.3 and 40.4 ppb. Distinct responses were retained at 300 ppb H 2 S and 200 ppb NH 3 , with response/recovery times of 15/22 and 25/43 s, respectively. A GRU-CNN model trained using dynamic four-channel signals supported gas classification and concentration estimation across 0−10 ppm and 30%−80% relative humidity within the tested dataset; the maximum concentration-prediction mean squared errors were 0.020 for H 2 S and 0.015 for NH 3 . The channels retained 98.4% and 98.1% of their initial responses under 30 ° bending. Integration with a wireless wristband enabled remote signal acquisition and a wearable monitoring demonstration. This work combines chemically differentiated sensing channels, humidity-inclusive data analysis, and flexible wireless readout within a single room-temperature platform.
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PubMed
高影响因子
ChemNanoMat
·
2025
·
IF 2.6
Keqiang Ding,Ying Bai,Xiaoxuan Liang,Yiqing Chen,Jiawen Bao,Qian Zhao,Mingxing Wu,Hui Wang
For the first time, a copper oxide (CuO)-containing lithium titanate (Li 4 Ti 5 O 12 , LTO) is prepared via an air annealing approach in which copper oxalate (CuC 2 O 4 ) and the commercial LTO are employed as the starting materials. As demonstrated by the X-ray diffractometer and X-ray photoelectron spectroscopy characterization results, CuO and LTO are indicated to be the main components of all prepared samples. Above all, all prepared samples, especially sample b, exhibit much better electrochemical performance than the commercial LTO. Particularly, the high-rate performances delivered by all synthesized samples, especially sample b, are significantly superior to that of the commercial LTO. For instance, the discharge capacity of sample b at 40 C after 500 cycles is about 40 mAh g −1 , which is about 14.8 times higher than that of the commercial LTO (2.7 mAh g −1 ). In the full-cell test, the discharge capacity of the cell assembled by sample b and the modified lithium iron phosphate (LiFePO 4 , LFP) at 10 C after 500 cycles (40.3 mAh g −1 ) is significantly larger than that of the full-cell assembled by the commercial LTO and the modified LFP (0.1 mAh g −1 ).
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