SENSORS AND ACTUATORS B-CHEMICAL
·
2016
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IF 4.758
Juan Yang,Huili Ye,Zhengqiong Zhang,Faqiong Zhao,Baizhao Zeng
A hollow CuCo 2 O 4 polyhedron/porous reduced graphene oxide (PrGO) composite was prepared by simple thermolysis-induced transformation of heterobimetallic zeolitic imidazolate frameworks/porous graphene oxide (Cu-Co-ZIFs/PGO). In this strategy, the PGO was suitable for Cu-Co-ZIFs growing and anchoring, and the framework acted as sacrificial template during the formation of morphology-inherited hollow polyhedrons. In the obtained composite, PrGO sheets not only provided conduction path, but also served as protective agent to prevent the aggregation of crystals. The hollow rhombic dodecahedral CuCo 2 O 4 possessed plentiful active sites and high electrocatalytic activity. When the composite was optimized and used for glucose sensing, it displayed good performance with a wide linear range of 0.5–3354 μM, a low detection limit of 0.15 μM (S/N = 3), a high sensitivity of 2426 μA mM −1 cm −2 and short response time (<3 s). Moreover, it could resist the interference of coexistent substances from serum sample etc. Thus the composite modified glassy carbon electrode was a promising enzyme-free glucose sensor.
研究领域:
材料科学
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电化学
·
生物传感
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Mian Hu,Meiqi Chen,Zhibin Li,Zhiheng Ye,Zhong-Ting Hu,Zhiyan Pan,Dabin Guo,François Nkinahamira,Jinling Wan,Libo Wu,Baihui Cui,Junliang Wang
Catalytic subcritical water oxidation (CSWO) of M−nitroaniline (M−NA) was investigated in a fused quartz tube reactor (FQTR) to determine the effects of reaction parameters on M−NA mineralization rate, total nitrogen (TN) removal rate and nitrogen-containing products distribution. The results indicated that the TN removal rate was only 26.36 % at 200 °C, 200 % excess oxidant and 15 min residence time, while the TN removal rate reached 67.83 % at 360 °C in SWO of M−NA. Compared with SWO of M−NA, the mineralization rate and TN removal rate of CSWO of M−NA increased by about 10 % and 17.83 %, respectively. The main reason is mainly attributed to CuCo 2 O 4 catalyzing the preferential reaction of ·NO 2 with ·NH 4 , hastening N 2 generation. Alternatively, the CuCo 2 O 4 catalyst may induce a direct reaction between the nitro and amino groups on M−NA within the benzene ring to form N 2 . Moreover, degradation pathways and nitrogen migration mechanism of M−NA under SWO/CSWO conditions were proposed. These crucial findings are expected to guide the development of environmentally sustainable catalytic technologies towards addressing significant water pollution challenges.
研究领域:
环境科学
·
催化化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Can Zhao,Nan Li,ALabdulsalam Mohammed Nasser,Yue Li,Shuqian Sun,Jiangquan Ma
The development of robust and cost-effective electrocatalysts is critical for enhancing the catalytic kinetics of the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and urea oxidation reaction (UOR) in alkaline media. Herein, a heterostructured electrocatalyst comprising boronized CuCo 2 O 4 hexagonal nanosheet clusters and Co 9 S 8 three-dimensional nanoparticles supported on nickel foam (B: CCO-CS/NF) was successfully synthesized via a two-step in situ hydrothermal approach. The resulting architecture features abundant electrochemically active sites and improved charge-transfer efficiency. In 1.0 M KOH, the optimized B: CCO-CS/NF electrode delivers superior bifunctional performance, with low overpotentials of 154 mV for the OER and 189 mV for the HER at 10 mA·cm −2 . For the UOR in 1.0 M KOH containing 0.33 M urea, a low working potential of 1.343 V is required to reach 10 mA·cm −2 , confirming a marked energy-saving advantage over conventional OER. Moreover, the catalyst exhibits satisfactory operational stability. The enhanced electrocatalytic activity is mainly attributed to the synergistic interplay between boron-induced lattice defects in CuCo 2 O 4 and the tight heterointerface with Co 9 S 8 , which collectively facilitate rapid electron transport and strong interfacial coupling effects. This work highlights the promising potential of the B: CCO-CS/NF heterostructure for energy-efficient hydrogen production and urea-containing wastewater treatment.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Yu Kong,Chengzhi Sun,Xian Wu,Kening Sun,Xiaoju Yin,Naiqing Zhang
The reduced operating temperature is requisite for the wide application of the solid oxide fuel cells owing to the lower cost and longer lifetime. Nevertheless, in the intermediate temperature range, the significantly increased polarization loss appears in the solid oxide fuel cells, reducing the final performance. In order to solve this issue, here we report the one-dimensional CuCo2O4–Er0.4Bi1.6O3 composite fibers, which are synthesized via electrospun method and utilized as cathodes of intermediate-temperature solid oxide fuel cells. The optimal Er0.4Bi1.6O3 mass ratio of 35 wt % has been ascertained, possessing the lowest cathode polarization resistance of 0.021 Ω cm2 at 800 °C, which is 3.3 times lower than those of the CuCo2O4–Er0.4Bi1.6O3 nanoparticle-structured composite cathode. All of the results demonstrate the potential of the CuCo2O4–Er0.4Bi1.6O3 composite nanofiber serving as an efficient cathode for the intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
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能源工程
·
电化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Hairui Li,Chang Liu,Zhonghua Mou,Peng Yu,Shiqi Wu,Wei Wang,Zhaohui Wang,Ruixia Yuan
The modulation of bimetallic oxide structures and development of efficient, easily recoverable catalysts are expected to effectively overcome the limitations associated with powdered catalysts in activating peroxymonosulfate (PMS). In this study, CuCo 2 O 4 was successfully immobilized on the surface of nickel foam (NF) via an electrodeposition-calcination procedure, with highly efficient activation of PMS for tetracycline (TC) degradation (0.55 min −1 ). Besides acting as a support carrier and providing ample active sites, NF mediated electron transport, prevented the leaching of metal ions and enhanced the efficiency of recycling. Density functional theory (DFT) calculations and experimental tests illustrated that Cu/Co dual-sites can efficiently adsorb PMS, enabling simultaneous reduction and oxidation reactions. The dual-site synergy substantially decreased the adsorption barrier and increased the electron transfer rate. Especially, the Cu + /Cu 2+ redox couple acted as an electron donor and facilitated rapid charge transfer, leading to the conversion of Co 3+ to Co 2+ . Moreover, the CuCo 2 O 4 @NF + PMS system effectively eliminated TC by employing radical pathways (SO 4 •− , • OH) and nonradical processes ( 1 O 2 , e − ). Therefore, this study introduces a new approach to overcome the limitations of powdered bimetallic oxides, providing a promising solution for practical applications.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengmeng Tian,Baiyang Hui,Tengyu Jia,Xinying Chen,Lanlan Li,Xiaofei Yu,Xinghua Zhang,Zunming Lu,Xiaojing Yang
Ammonia borane (NH 3 BH 3 , AB) is considered a promising chemical hydrogen storage material. The development of efficient, stable, and economical catalysts for AB hydrolysis is essential for realizing the hydrogen energy economy. In this study, a series of p-p heterojunction catalysts, labeled M (P/S/Cl)-CuCo 2 O 4 , were fabricated using the high-temperature vapor phase method to achieve anionic interface gradient doping. Due to the differences in electronegativity among the anions P/S/Cl–O, electron-rich and electron-deficient regions are generated at the interface, inducing the formation of local p-p heterojunctions with built-in electric fields (BIEF). The difference in work function (ΔW f ) at the interface enhances the strength of the BIEF. Because of the positive influence of the BIEF on the adsorption of intermediates and interfacial behavior, the catalytic performance of P-CuCo 2 O 4 , characterized by a hydrogen evolution rate (HER) of 1125 mL H2 (g cat ·min) −1 , is significantly higher than that of intrinsic CuCo 2 O 4 , which has an HER of 705 mL H2 (g cat ·min) −1 . Its apparent activation energy of only 32.25 kJ/mol is superior to that of previous non-precious metal catalysts. Density functional theory (DFT) further confirms that the construction and enhancement of the BIEF can reduce the band gap, accelerate electron transfer, regulate the metal d-band center, and enhance the adsorption of AB and H 2 O molecules. This process facilitates the elongation and breakage of the O–H bond length in H 2 O and the B–H bond length in AB, thereby promoting the release of H 2 .
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jingxuan Zheng,Dapeng Meng,Junxin Guo,Zhao Wang
Transition metal sulfide (TMS) are considered promising alternatives to noble metals for high-efficiency oxygen reduction and oxygen evolution (ORR/OER). However, traditional preparation methods or post-treatment processes can lead to the formation of oxide overlayers on the TMS catalysts, which can hinder their electrochemical performance. Herein, a sulfur-vacancy enriched CuCo 2 O 4 /CuCo 2 S 4 heterostructure was prepared using cold plasma. Plasma also achieved the in-situ etching of oxide overlayers on the surface of catalysts. There is a strong correlation between the oxide overlayers and ORR/OER activity. Specifically, the number of ORR electrons transferred increased (n: from 2.8 to 3.7), while the OER overpotential decreased ( η : from 417 to 330 mV) in 0.1 M KOH with the decrease of the oxide overlayer concentration ( SO 4 2 − / S M − S : from 1.795 to 0.798). The theoretical calculation reveals the influence of oxide overlayers and S vacancy on the binding energy of the intermediate. The findings suggest that this work provides a new idea for designing metal sulfide electrochemical catalyst.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2026
·
IF 5.9
Yadong He,Changsheng Tang,Zhangyong Li,Shu Zhao,Yixin Kang,Yangxin Zhang,Xinzhan Wang,Ling Li
A hierarchical CCO@ZWO core-shell architecture was fabricated on nickel foam. • Binder-free CCO@ZWO/NF electrode delivers 3670 mF cm −2 at 1 mA cm −2 . • The CCO@ZWO/NF//AC/NF ASC retains 87.75% capacitance after 7800 cycles. • The ASC device achieves 0.198 mWh cm −2 at 0.75 mW cm −2 . One heavily relied-upon strategy for achieving advanced electrode materials with superior properties for asymmetric supercapacitors (ASCs) is the rational design of hierarchical core-shell heterostructures on conductive substrates. In this work, a well-defined urchin-like CuCo 2 O 4 @ZnWO 4 (CCO@ZWO) core-shell heterostructure was successfully fabricated on porous nickel foam (NF) via a simple two-step solvothermal process, followed by thermal annealing. The hierarchical structure is composed of CuCo 2 O 4 nanoneedles serving as the conductive core, with ZnWO 4 nanosheets uniformly anchored as the shell layer, which collectively provides an extensive specific surface area with a high density of electroactive centers and favorable ion/electron transport kinetics. With a binder-free architecture, the CCO@ZWO/NF composite delivers a high areal capacitance of 3670 mF cm −2 at a current density of 1 mA cm −2 , enabling the assembly of an asymmetric supercapacitor with CCO@ZWO/NF as the positive electrode and NF-supported activated carbon as the negative electrode. The device exhibited a cycling stability that was evaluated over 7800 cycles at 4 mA cm −2 , showing a capacitance preservation of 87.75%, while a capacitance per unit area of 633.7 mF cm −2 was obtained at 1 mA cm −2 . The remarkably improved electrochemical performance stems from the cooperation between the two components and the robust core-shell architecture, which effectively mitigates volume expansion and structural collapse during repeated cycling. These findings underscore the considerable promise of the designed CCO@ZWO core-shell heterostructure in serving as an advanced electrode material, offering a viable pathway for exceptional energy storage applications. A biomimetic urchin-like CuCo 2 O 4 @ZnWO 4 core-shell heterostructure was grown on nickel foam via a two-step solvothermal method with subsequent annealing. The hierarchical architecture provides a large specific surface area, abundant active sites, and fast ion/electron transport. The CCO@ZWO/NF electrode delivers a high areal capacity of 3670 mF cm −2 at 1 mA cm −2 , and the ASC device achieves an energy density of 0.198 mWh cm −2 with 87.75% retention after 7800 cycles. This superior performance stems from the synergistic interplay between the core-shell morphology and the multi-metal oxide composition. Download: Download high-res image (352KB) Download: Download full-size image
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DOI
高影响因子
VACUUM
·
2025
·
IF 3.9
Peng Zhang,Caijing Zhang,Fengjuan Miao,Bairui Tao
This study presents a nickel-foam supported TiO 2 /CuO/CuCo 2 O 4 composite electrode for dual-functional applications in non-enzymatic glucose sensing and supercapacitors. In glucose sensing performance tests, the TiO 2 /CuO/CuCo 2 O 4 electrode demonstrated a broad linear detection range (0.23–3.8 mM) and a high sensitivity of (715.2 ± 5) μA·mM −1 cm −2 , with a detection limit as low as 0.58 μM (signal-to-noise ratio, SNR = 3). Furthermore, the material exhibited outstanding performance in supercapacitor applications. Even at a high current density of 2 A g −1 , it maintained a specific capacity of up to (620 ± 15) C·g −1 , after 5000 cycles, the capacitance retention remained at (91.8 ± 0.3)%. The material's hierarchical porous structure and strong interfacial bonding contribute to its excellent performance, demonstrating great potential for multifunctional, high-efficiency energy storage and sensing materials.
研究领域:
生物医学工程
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电化学传感
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能源材料
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纳米材料
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分析化学
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生物传感器
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 4
·1-10
·
IF 5.3
Liu Yan,Xin Yuying,Wang Xin,Zhang Xianfa,Xu Yingming,Cheng Xiaoli,Gao Shan,Huo Lihua
An electrochemical sensor for detecting ketoprofen was constructed by in-situ grown copper cobaltate (CuCo 2 O 4 ) nanoneedle arrays on a carbon cloth (CC) substrate. The resulting porous nanoneedle arrays not only expose numerous electrochemically active sites but also significantly enhance the electrochemical apparent active area and current transmission efficiency. By leveraging its electrochemical properties, the sensor achieves an impressive detection limit for ketoprofen of 0.7 pM, with a linear range spanning from 2 pM ~ 2 µM. Furthermore, the sensor exhibits remarkable reproducibility, anti-interference capabilities, and stability. Notably, the developed sensor also performed ketoprofen detection on real samples (including drug formulations and wastewater) and demonstrated excellent recognition ability. These exceptional performances can be attributed to the direct growth of CuCo 2 O 4 nanoneedle arrays on the CC substrate, which facilitates a robust electrical connection, provides abundant electrocatalytic active sites, and expands the apparent active area. Consequently, these improvements contribute to the efficient trace detection capabilities of the ketoprofen sensor. Graphical Abstract
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
RARE METALS
·
2026
·Vol. 45
·期 7
·e70444
·
IF 12.1
Bingran Qi,Chang Zheng,Shifeng Jin,Kezhu Li
en This link goes to a English section zh This link goes to a Chinese section Deep skin infections and dense biofilm barriers caused by Propionibacterium acnes ( P. acnes ) remain significant challenges in recurrent acne vulgaris, exacerbated by the poor stratum corneum penetration of conventional therapies and rising antibiotic resistance. Herein, we report a microwave (MW)-responsive microneedle (MN) patch integrated with CuS/CuCo 2 O 4 heterojunction nanoparticles for targeted acne therapy. The MN array mechanically breaches the stratum corneum for precise localized delivery, whereas MW irradiation—leveraging its excellent deep-tissue penetration—induces efficient interfacial charge transfer within the heterojunction to generate abundant reactive oxygen species (ROS) in situ. This system achieves over 99% antibacterial efficiency against both Staphylococcus aureus ( S. aureus ) and P. acnes , effectively eradicating mature biofilms through synergistic physical and biochemical mechanisms. Furthermore, the localized release of Cu 2+ and Co 2+ ions demonstrates enzyme-like ROS-scavenging capabilities, which activate the NRF2 antioxidant and autophagy-lysosomal pathways while suppressing the NLRP3/ASC/Caspase-1 inflammasome. Transcriptomic analysis confirms the downregulation of the NF-κB signaling pathway, promoting a microenvironmental transition from a pro-inflammatory to a pro-repair state. Consequently, this transition facilitates fibroblast migration, angiogenesis, and subsequent tissue remodeling. Ultimately, this MW-driven interfacial engineering strategy overcomes the penetration limitations of traditional treatments, presenting a highly promising platform for deep-tissue infection management. 摘要 en This link goes to a English section zh This link goes to a Chinese section 由痤疮丙酸杆菌( Propionibacterium acnes , P. acnes )引起的深层皮肤感染及致密生物膜屏障仍然是复发性寻常痤疮治疗中的重大挑战,这一问题因传统疗法对角质层穿透性差及抗生素耐药性上升而更加严重。本文报道了一种微波(MW)响应型微针(MN)贴片,其整合了CuS/CuCo 2 O 4 异质结纳米颗粒,用于靶向痤疮治疗。微针阵列可机械性破坏角质层,实现精准局部递送,而微波照射利用其优异的深层组织穿透能力,在异质结界面诱导高效电荷转移,原位生成丰富的活性氧(ROS)。该系统对金黄色葡萄球菌( S. aureus )和 P. acnes 的杀菌效率均超过99%,通过物理与生化机制协同作用,有效清除成熟生物膜。此外,局部释放的Cu 2+ 和Co 2+ 离子表现出类酶的ROS清除能力,可激活NRF2抗氧化通路及自噬-溶酶体途径,同时抑制NLRP3/ASC/Caspase-1炎症小体。转录组分析显示NF-κB信号通路下调,促进微环境由促炎向促修复状态转变,从而有利于成纤维细胞迁移、血管生成及后续组织重塑。最终,这一微波驱动的界面工程策略克服了传统疗法的穿透限制,为深层组织感染管理提供了极具前景的平台。
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Youpeng Li,Miao Liu,Shuang Hou,Pu Wang,Xuexue Pan,Meixiang Xie,Yongxin Chen,Lingzhi Zhao
In this work, a novel urchin-like CuCo 2 O 4 directly grown on three-dimenstional (3D) Ni foam as a binder-free anode materials of lithium-ion batteries via one-step solvothermal method followed by subsequent annealing. The microstructure and phase composition were characterized systematically. The result indicated that the product at a calcination temperature of 550 °C yielded the most outstanding electrochemical properties with incredible reversible specific capacity of 1700 mAh/g after 100 cycles at 200 mA/g and extraordinary rate performance of 1250 mAh/g at 1000 mA/g. The likely contributing factors to the glorious electrochemical performance of the product were related to the unique urchin-like structure containing one-dimenstional (1D) nano-needles, which could tolerate the volume effect during the Li + insertion/extraction process and provide more channels for the transmission of electron and ions, as well as the introduction of Ni foam accelerating the transmission rate of electron.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）