MICROCHIMICA ACTA
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2022
·Vol. 189
·期 7
·1-10
·
IF 6.408
Wang Meng,Dong Hui,Zhang Yintang,Zhu Xu,Gu Mengjiao,Zhu Qianqian,Miao Xing,Zhou Yanli,Xu Maotian
As a vital gaseous signal molecule involved in various physiological and pathological processes, nitric oxide (NO) has attracted extensive attention in the last few decades. In this work, a copper and cobalt element-doped, biphenyl-(3, 4′, 5)-tricarboxylic acid (H 3 PTC)–synthesized metal organic framework (CuCo-PTC MOF) composite with catalytic ability was synthesized by solvothermal method. The material can catalyse the oxidation of o-phenylenediamine (OPD) groups by hydrogen peroxide (H 2 O 2 ) to form fluorophores (OPDox) with yellow fluorescence emission and greatly improves its reaction rate. In the presence of NO, OPD will react with NO to produce N-(2-hydrazinophenyl) methylamine, and the group will not react with H 2 O 2 . Therefore, the concentration of NO can be measured indirectly by comparing the changes of fluorescence intensity in the presence and absence of NO. As the concentration of NO changes, the change of solution colour (from bright yellow to colourless) can also be observed under a 365-nm UV lamp. Furthermore, the method represents high selectivity for NO and shows a fast (within 5 min) and specific fluorescence response toward NO with a linear range from 0.25 to 2.0 μM; the strategy has a limit of detection (LOD) of 0.15 μM. More importantly, the probe was successfully used to detect NO in cell lysate. The recovery was between 98.5 and 103.6%, and the relative standard deviation was between 0.4 and 1.8%. The endogenous NO in cells was successfully detected under the stimulation of L-arginine, which proved the possibility of the probe in real-time and rapid sensing in actual samples and cells. The results indicate that this sensing strategy has the potential to detect NO in the internal environment. Graphical abstract Schematic of fluorescence detection of NO
研究领域:
生物化学
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分析化学
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DOI
PubMed
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2022
·
IF 8.129
Xiudong Zhu,Yunshan Shang,Jingyun Chen,Hui Wei,Deping Xu,Xiongchao Lin,Yonggang Wang
A series of lanthanum oxide modified Cu Co based catalysts for the direct conversion of syngas to higher alcohols were synthesized via the coprecipitation method. The influence of lanthanum on the textural properties and catalytic performance was investigated. It was found that lanthanum-modified Cu Co based catalysts possessed a novel nanosheet structure to form more oxygen vacancies . Compared with CuCo catalyst, the dissociative CO adsorption and associative CO adsorption capacities of La x CuCo catalysts were improved markedly, and formate and methoxy intermediates were more easily formed on the surface of La x CuCo catalysts, which is attributed to the proper synergy of the surface active sites (Cu 0 , Co 0 , and oxygen vacancies). In particular, the addition of lanthanum species reduced the thickness of the nanosheets and facilitated the high dispersion of La x CuCo after reaction by acting as isolation islands to restrain the aggregation and growth of crystal grain. The evaluation results showed that optimized La 0.3 CuCo catalyst exhibited the highest CO conversion of 25.4%, superior total alcohols selectivity of 61.4%, and C 2+ alcohols selectivity of 79.03% among the total alcohol products, and excellent stability.
研究领域:
催化化学
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材料科学
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zhiqian Yao,Suqiong Xu,Xianke Zhang,Jujun Yuan,Chuicai Rong,Zuzhou Xiong,Xiurong Zhu,Yi Yu,Huajun Yu,Shuying Kang,Fangguang Kuang
Metal–organic frameworks (MOFs) have come into the limelight in the field of microwave absorption since they can be developed into porous carbon-based MOF derivatives with a variety of features, such as controlled defects, tunable structures, and variable compositions. In this paper, Cu3[Co(CN)6]2 Prussian blue analogue (CuCo-PBA) precursors with a regular cubic morphology were synthesized by a simple co-precipitation method and converted into CuCo nanocube/N-doped carbon nanotube (CuCo/NCNT) derivatives by annealing them in argon. It was found that when the annealing temperature was 850 °C, the minimum reflection loss (RLmin) of CuCo/NCNT could reach −54.13 dB with an effective absorption bandwidth of 4.01 GHz. The excellent microwave absorption properties were attributed to the mutual synergy of conduction loss, interfacial polarization, magnetic resonance loss, and eddy current loss. Therefore, this work provides an effective preparation method for the design of lightweight carbon-based microwave-absorbing materials with heterogeneous interfaces using Prussian blue.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xiaodi Jiang,Yaoning Bai,Xu Wang,Weiyao Wang,Yuxian Duan,Yingnan Liu,Xinru Li,Zichen Wang,Jinming Cai,Xiaoming Cai,Honglin Tan
Bimetallic nanostructures are currently a hot pot material among many hydrogen generation co-catalysts. In this study, CuCo bimetallic nanostructures were formed by introducing Co into Cu as the co-catalyst for TiO 2 . Characterization results from XRD , XPS , and TEM indicated the successful preparation of the high-crystallinity, impurity-free CuCo/TiO 2 photocatalyst , with CuCo bimetallic nanoparticles uniformly dispersed on TiO 2 . After the addition of Co, density functional theory (DFT) calculations showed that the free energy of H adsorption on the Cu site was optimized from 0.27 eV to −0.56 eV, which was beneficial for hydrogen production from TiO 2 . Electrochemical characterization, photoluminescence (PL) spectroscopy, infrared (IR) thermography, and finite difference in time domain (FDTD) results showed that the bimetallic CuCo acted as the co-catalyst, which increased the temperature of the reaction system, facilitated the separation of light-generated electron-hole pairs, and accelerated the charge transfer, thus promoting the photocatalytic hydrogen generation. The findings of the photocatalytic performance demonstrate that the photocatalyst exhibits the H 2 generation rate of 1933.8 μmol/g/h, which is approximately 9 times greater than that of pure TiO 2 (213.4 μmol/g/h), when the bimetallic CuCo is loaded in the molar ratio of 5:5 and at the loading amount of 2 wt%. Additionally, the photocatalyst demonstrated excellent catalytic stability, reaching 87.1% of the initial after 16 h of cycling tests. It is foreseen that further study and optimization of various metal couplings may enable the larger widespread application of bimetals as co-catalysts for hydrogen generation.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 9
·2832-2839
·
IF 3.186
Zhang Fengming,Li Ran,Zhang Jiapeng,Dong Hua
Dendritic fibrous KCC-1 supported CuCo bimetal catalysts (CuCo/KCC-1) are fabricated by coprecipitating Cu 2+ and Co 2+ on the surface of KCC-1 nanospheres. The microstructure and composition of the fabricated CuCo/KCC-1 bimetal catalysts are analyzed with ICP-OES, SEM, TEM, and XPS. The CuCo/KCC-1 catalysts demonstrate excellent performance in catalyzing ammonia borane hydrolysis to produce hydrogen in alkaline solutions. As an example, the hydrolysis of ammonia borane catalyzed by Cu 3 Co 1 /KCC-1 (with a Cu/Co molar ratio about 3:1) gives a hydrogen generation rate of 5.43 L/(min g metal ), and an activation energy of 23.96 kJ/mol. The synergic effect between Cu and Co in the CuCo/KCC-1 catalysts maintains the excellent catalytic activity while reducing the usage of Co, making it possible to decrease the cost of the catalyst. Graphical Abstract
研究领域:
催化化学
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材料科学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Xiaoqin Li,Huizi Lin,Xuwei Chen,Fenqiang Luo,Rong Zhang,Xiaoyan Deng,Youxiu Lin,Dianping Tang,Wenqiang Lai
Colorimetric immunoassays are widely used for biomarker detection, offering advantages of simplicity, sensitivity, and cost-effectiveness. Recent advancements focus on improving the catalytic activity of nanozymes for enhancing the sensitivity and accuracy of such assays. Bimetallic CuCo Prussian blue analog (CuCo PBA) has emerged as promising candidates due to their excellent peroxidase-like activity. However, their instant synthesis and integration into immunoassays for the rapid detection of biomarkers like carcinoembryonic antigen (CEA) remain underexplored. This study presents an innovative approach using CuCo PBA nanozymes for colorimetric immunoassays with immediate generation and application. In this study, CuCo PBA nanozymes were synthesized instantly by reacting Cu 2+ with K 3 [Co(CN) 6 ] (<1 min), and their peroxidase-like activity was exploited for a colorimetric immunoassay system targeting CEA. The system demonstrated a clear blue color change upon the reaction of CuCo PBA with H 2 O 2 and 3,3′,5,5′-tetramethylbenzidine (TMB), enabling sensitive detection. The assay was optimized for various parameters, including pH, temperature, and material ratio. A linear response was obtained for CEA detection over a concentration range of 0.05–60 ng/mL with a limit of detection (LOD) of 22 pg/mL. The integration of glucose oxidase (GOx) mediated the generation of H 2 O 2 , triggering the colorimetric reaction. This instantaneous CuCo PBA-based system effectively detected CEA in human serum samples, highlighting its potential for rapid diagnostic applications. This work introduces a novel approach for rapid and sensitive colorimetric immunoassays using CuCo PBA nanozymes that are synthesized on-demand and immediately applied. The system allows for efficient CEA detection with an exceptionally low detection limit, offering great potential for clinical diagnostics. The instant generation and application of CuCo PBA nanozymes in immunoassays represent a significant advancement in point-of-care testing technologies.
研究领域:
生物化学
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医学诊断
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Rongrong Du,Hongyang Zhu,Shuo Wang,Hongyao Zhao,Mengting Liu,Yanyun Wang,Yiyan Song,Fu Yang
Photothermal nanomaterials have showed great potential for development in simultaneous pollutant purification and freshwater recovery. In this study, a novel composite composed of hollow N-doping SiC porous hybrid network with the integration of CoCu bimetal species was constructed by a simple self-assembly and temperature-modulated approach. Such a hollow porous hybrid nanoreactor is endowed with abundant synergetic CuCo bimetallic reactive sites and polar pyrrolic N sites, which improves the enrichment of pollutants and intermetallic redox pairs. Ultrafine nanocrystals corresponding to Co 2 SiO 4 over the hybrid framework can be evidenced by HRTEM technique. The experimental results showed that the optimal CoSiCu-6 degraded norfloxacin (NFX) by 90.7% in 10 min with a pseudo-first-order rate constant of 0.493 min −1 , which was about 6.49 folds enhancement compared to Cu-free CoSi-6 counterparts, achieving a low reaction activation energy (18.02 kJ mol −1 ) during the reaction. Control experiments including anion interference and broad applicability for pollutants degradation were further explored, emphasizing the excellent performance of CoSiCu-6 in the practical contaminant removal. The mechanism study showed that, single linear oxygen ( 1 O 2 ) coupled with electron-transfer process work as the main activation routes dominating the degradation process. In addition, Co 3+ /Co 2+ /Cu 2+ redox pairs and oxygen vacancies (O v ) play a key role in the PMS activation process. The obtained optimal catalyst was further explored for solar-driven photothermal interfacial water evaporation, showing a rational cleanwater recovery efficiency (∼1.3 kg m −2 h −1 ) from the polluted wastewater. In addition, monolith floatable evaporator was constructed by anchoring CoSiCu-6 onto a tailored melamine sponge foam via a calcium ion-triggered sodium alginate cross-linking strategy, affording an excellent evaporation performance (2.16 kg m −2 h −1 ) and coupled norfloxacin degradation efficiency (93.6%, within 5 min). This innovative monolithic evaporator made of CoCu integrated SiC hybrid nanosphere has a powerful dual function of rapidly degrading pollutants and facilitating solar-powered regeneration of contaminated wastewater due to its unique hollow porous structure and the CoCu bimetallic synergistic action that provides a rich set of reaction sites, which is promising for the treatment of complicated wastewater.
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
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2024
·
IF 15.7
Yanru Zhu,Zhijun Zhang,Jian Zhang,Shuangjiang Jiang,Zhe An,Hongyan Song,Xin Shu,Wei Xi,Lirong Zheng,Jing He
ABSTRACT Photosynthesis is a potential strategy to enable endergonic process that usually needs high-temperature in thermochemistry to supply the energy for inert-bond activation and/or strong endothermic reaction . The conversion of CO 2 into value-added C 2 -oxygenates is a promising process to realize artificial photosynthesis , but suffers from relatively lower efficiency due to complex multi-electron (≥ 10) transfer processes and sluggish kinetics of C–C coupling. This work proposes an all-new H 2 O-promoted strategy for efficient production of C 2 oxygenates from the concurrent activation and subsequent co-conversion of CO 2 with CH 4 under photo-thermal cooperation, in which photocatalytic H 2 O-splitting derived active hydrogen species for CO 2 activation, and concomitant active oxygen species for CH 4 activation. A formation rate of as high as 2.05 mmol g −1 h −1 for C 2 -oxygenates (CH 3 CHO and CH 3 CH 2 OH) in a selectivity of > 86% has been afforded over SrTiO x supported CuCo under 200 °C and ultraviolet-visible illumination. It has been revealed that SrTiO x drives photocatalytic H 2 O-splitting under the excitation primary from ultraviolet light, paired Cu I /Cu 0 sites promote the formation of *CH x O intermediate from CO 2 , Co sites conduct CH 4 -to-*CH 3 , and C–C coupling of *CH x O and *CH 3 on adjacent Cu-Co facilitates the generation of C 2 -oxygenates.
研究领域:
化学工程
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催化科学
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能源转换
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Lianfang Wang,Ang Cao,Guilong Liu,Lihong Zhang,Yuan Liu
Higher alcohols synthesis (HAS) is a strong exothermal reaction which leads to the formation of hotspots on the catalysts and the hotspots result in poor selectivity, and Cu–Co based catalysts are one of the most promising to which the formation of Cu–Co alloy is critical. Therefore a new scheme was proposed, based on the excellent thermal conductivity of carbon fibers (CFs) and the uniform mixing of metal ions in layered double hydroxides (LDHs), the latter favors the formation of metallic alloy. Nanocomposites of LDHs and CFs were prepared by using co-precipitation method and used for HAS, and characterized by using FTIR, N 2 adsorption–desorption, XRD, TPR, SEM and TEM techniques. In the composites, nanosheets with the typical LDHs morphology are perpendicularly grown on the surface of CFs while intersecting each other, creating a highly open and porous structure. After reduction, Cu–Co-alloy nanoparticles are formed from the LDHs. The resultant catalysts showed high activity and much high selectivity to higher alcohols. The reported methods can be expanded to prepare other LDHs/CFs composites.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Huanhuan Dong,Xiaoyu Ji,Zhao Li,Junxiang Guo,Shan Peng
Viscous oil spills (e.g., petroleum and diesel) in marine environments and domestic oily wastewater pose seriously ecological and public health risks owing to their high viscosity and poor fluidity, making the remediation a very urgent challenge. To address these issues, we designed an inherently hydrophobic MXene/hollow CuCo-MOF (H-CuCo-MOF)@PDMS sponge featuring an instantly photothermal response and a multiscale wrinkled structure. The confined effects of H-CuCo-MOF and MXene synergistically generate an efficient electron transport network, where interfacial charge transfer enhances carrier lifetime, thereby prolonging photothermal conversion efficiency. In Addition, the high specific surface area of H-CuCo-MOF and the layered structure of MXene increase confined adsorption sites while preventing MOF aggregation. Stress mismatch between flexible PDMS and rigid MXene form a highly wrinkled architecture, effectively mitigating MXene stacking. Under 1-sun irradiation, the sponge’s surface temperature quickly reaches ∼80 °C within 20 s, altering surface tension and inducing the Marangoni effect to accelerate oil absorption. Moreover, taking advantages of high match between the coated sponge and the viscous oil, the separation efficiencies are exceeding 95 % for diesel oil and rapeseed oil, and 82.7 % for crude oil. The material also proves superior durability, maintaining stable hydrophobicity after 150 friction cycles, exceptional mechanical recovery (99.2 % after 10 compressions), and notable salt resistance and antibacterial properties.
研究领域:
环境科学
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材料工程
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纳米技术
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化学工程
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 12
·1-11
·
IF 5.833
Wang Xiao,Liao Xiaochen,Zhang Bingjian,Zhang Mengmeng,Mei Lisha,Wang Fangwai,Chen Siyu,Qiao Xiuwen,Hong Chenglin
Abstract Carcinoembryonic antigen levels in the human body reflect the conditions associated with a variety of tumors and can be used for the identification, development, monitoring, and prognosis of lung cancer, colorectal cancer, and breast cancer. In this study, an amperometric immunosensor with CuCo/carbon nanocubes (CuCo/CNC) as the signal label is constructed. The bimetal-doped carbon skeleton structure has a high specific surface area and exhibits good electrocatalytic activity. In addition, Au/g-C 3 N 4 nanosheets (Au/g-C 3 N 4 NSs) are used to modify the substrate platform, facilitating the loading of more capture antibodies. The reaction mechanism was explored through electrochemical methods, X-ray powder diffraction, X-ray photoelectron spectroscopy, and other methods. Kinetic studies have shown that CuCo/CNC have good peroxidase-like activity. In addition, the electrocatalytic reduction ability of CuCo/CNC on hydrogen peroxide can be monitored using amperometric i – t curve (− 0.2 V, vs. SCE), and the response current value is positively correlated with the CEA antigen concentration. The prepared electrochemical immunosensor has good selectivity, precision, and stability. The dynamic range of the sensor was 0.0001–80 ng/mL, and the detection limit was 0.031 pg/mL. In addition, the recovery and relative standard deviation in real serum samples were 97.7–103 % and 3.25–4.13 %, respectively. The results show that the sensor has good analytical capabilities and can provide a new method for the clinical monitoring of CEA. Graphic abstract
研究领域:
生物医学工程
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肿瘤学
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分析化学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2024
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IF 3.7
Antai Kang,Jiangtao Li,Yubin Li,Min Cao,Li Qiu,Bo Qin,Yanze Du,Feng Yu,Sha Li,Ruifeng Li,Xiaoliang Yan
Bimetallic CuCo catalysts with different Cu to Co ratios on N-doped porous carbon materials (N-C) were achieved using impregnation method and applied in the hydrogenation of furfural (FAL) to furfuryl alcohol (FOL). The high hydrogenation activity of FAL over Cu 1 Co 1 /N-C was originated from the synergistic interactions of Cu and Co species, where Co 0 and Cu 0 simultaneously adsorb and activate H 2 , and Cu + served as Lewis acid sites to activate C═O. Meanwhile, electrons transfer from Cu to Co promoted the formation of Cu + . In situ Fourier transform infrared spectroscopy analysis indicated that Cu 1 Co 1 /N-C adsorbed FAL with a tilted η 1 -(O) configuration. The superior Cu 1 Co 1 /N-C showed excellent adsorbed ability towards H 2 and FAL, but weak adsorption for FOL. Therefore, Cu 1 Co 1 /N-C possessed 93.1% FAL conversion and 99.0% FOL selectivity after 5 h reaction, which also exhibited satisfactory reusability in FAL hydrogenation for five cycles.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）