NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 37
·16475-16480
·
IF 2.7
Xiaoxu Zhang,Xiangyu Cai,Yanqun Fei,Yuying Jia,Hongyan Shan,Yanfu Huan
In this article, a CRET-based chemiluminescent sensor was developed for ascorbic acid detection. Au/Pt@Cu2O/CuO NPs with peroxidase activity were prepared to catalyse the decomposition of H2O2 to produce free radicals, which led to the enhancement of the chemiluminescence (CL) signal, and the CRET between luminol and MnO2 NSs was able to take place and the CL signal was reduced; the presence of ascorbic acid would reduce MnO2 NSs, which was able to weaken the energy transfer between luminol and MnO2 NSs and restored the CL signal. Under the optimal experimental conditions, the detection range of ascorbic acid was 1–1000 μM, and the LOD was 0.35 μM. The method is sensitive and has a wide linear range, and is expected to be applied to the detection of ascorbic acid in more complex environments.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiuzhen Li,Yuanting Ni,Chenxi Liu,Shaohua Xu,Wei Shu,Hong Liang,Ming Chen
Background Homocysteine (Hcy) has been recognized as an independent risk factor for the development of cardiovascular disease. Many electrochemical detection methods have been developed for analyzing Hcy, however, the specificity of these methods is based on the interaction between the sulfhydryl groups in Hcy and the metallic materials, and thus the specificity of such detection is not satisfactory. Results In this study, an electrochemical sensor based on COFs and Pd@CuO was developed for the specific detection of Hcy. Firstly, COFs material was used as an immobilized carrier for cystathionine β-synthase (CBS), and the immobilized CBS as a recognition unit was able to catalyze the production of H 2 S from the substrates (Hcy and Cys) in a specific manner. Secondly, the Pd@CuO composite material has excellent conductivity and can catalyze H 2 S as a source of electrochemical signal generation. The electrochemical sensor constructed based on the above principles has a good electrochemical response to Hcy within the range of 5 μM to 100 μM, and the limit of detection can reach 0.11 μM (S/N = 3). In addition, the constructed sensor has good reproducibility, stability and specificity, and has good recoveries in the detection of real plasma samples, which provides a potential application for the diagnosis of homocysteinemia. Significance and Novelty The electrochemical sensor significantly increases the specificity of detection by utilizing immobilized Hcy specific catalytic enzymes CBS. In addition, Pd modified CuO@COFs electrode greatly increases the conductivity of the electrode, thereby increasing the sensitivity of detection. These characteristics make the electrochemical sensor have good application prospects for detecting the Hcy in clinic in the future.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2020
·
IF 2.304
Su-Juan Wang,Fahime Bigdeli,Xiao-Wei Yan,Leili Esrafili,Kuan-Guan Liu,Hosein Ghasempour,Xiao-Qing Cai,Mao-Lin Hu,Ali Morsali
A novel binuclear Cu(II) complex based on ferrocene dicarboxylate was synthesized through ultrasonic and solvothermal processes and its structure confirmed by spectroscopy (IR), ultraviolet-visible spectrum (UV–Vis) and powder X-ray diffraction analysis (PXRD). Structural characterization of the complex was performed through single-crystal X-ray diffraction and thermal stability of it was perused via thermogravimetric analysis (TGA). The title Cu(II) complex was used as an effective sensor for H 2 O 2 . The electrochemical method is one of the most effective methods for material sensing. In many electrochemical techniques to increase the efficiency of activity, the electrochemically active agent is supported on a substrate. Instead of using substrate, the chemical active agent can be applied as a part of the complex structure. In this work, ferrocene dicarboxylate as an active agent in the Cu(II) complex has been used for sensing of H 2 O 2 . Due to the effect of particle size on electrochemical activity, the nano-sized complex was synthesized by ultrasonic technique (as an environmentally friendly method) and also, CuO nanoparticles were also obtained by thermal decomposition of ultrasonic treated complex at 500 °C. The size and morphology of the nanoparticles were explored by scanning electron microscopy (SEM). As well as, they were characterized through X-ray diffraction (XRD) and elemental mapping.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xuechen Zhou,Limo He,Chiyu Wang,Yufan Yang,Yanglin Chen,Song Hu,Sam Fong Yau Li,Yifei Sun,Sheng Su,Yi Wang,Jun Xiang
Methanol, as a H 2 storage carrier, is a good option to tackle with the challenges of H 2 storage and transportation. To improve hydrogen production and reduce energy consumption, a new approach of electrified methanol decomposition (MD) by Joule heating was investigated in this work. The conductive metal skeleton catalysts were prepared using nickel foam (NF) as a catalyst support and employing a hydrothermal-impregnation method to load the Cu/Zn active components. The catalyst heats up rapidly upon energizing, and the heating rates reaches over 10 °C/s. The Joule heating method significantly promotes the methanol conversions of CuO-ZnO/NF, CuO/NF, and ZnO/NF. Methanol conversion over CuO-ZnO/NF at 300 °C under Joule heating is over 80 % higher than that of conventional external heating, while its energy consumption is only 29 % of that under external heating. As a result, methanol conversion per unit power in Joule heating condition increases by 5.6 times compared with that in external heating. The in/ex-situ characterizations reveal that the Joule heating of metal skeleton catalyst promotes the lattice oxygen release of NF skeleton and redox of Cu/Zn species, which generates an extra electrochemical effect on the reaction. This study of Joule heating provides a new strategy of converting methanol to H 2 in a more efficient, energy-saving, and flexible way, and has important application potential in hydrogen energy and chemical energy storage (“Power-to-X”).
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junkai Hao,Hanning Song,Shuo Sun,Jing Feng,Hongben Zhang,Xuewan Zhang,Xuejiao Ren,Zhengquan Yan,Lei Hu
To improve the sensitivity and selectivity for S 2− and Fe 2+ detection in complex agricultural products, ultra-small nano CeO 2 /CuO doped carboxylated chitosan fibers (CeO 2 /CuO CCF) was constructed under microwave-assisted conditions. Not only did CeO 2 /CuO CCF possess suitable BET specific surface area, superior stability and synergistic-enhancement oxidase-like activity, trace S 2− or Fe 2+ could selectively change its oxidase-like activity accompanying with visible color changes. Under the optimized conditions, there express specific double ratiometric colorimetric linear relationships between lg( A 729 / A 343 )/lg( A 415/ A 343 ) and c S 2− or c Fe 2+ with large linear ranges. When applied for visual monitoring of S 2− and Fe 2+ in real agricultural products, the detection limits were low to 3.5 × 10 −9 mol·L −1 and 9.4 × 10 −8 mol·L −1 respectively, far below the permitted values in drinking water by World Health Organization. The mechanisms for synergistic-enhancement oxidase-like activity for CeO 2 /CuO CCF to selectively recognize S 2− and Fe 2+ were proposed. This work will provide an efficient way for visual monitoring of multiple analytes in complex agricultural products.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yue Shen,Jielian Yang,Bing Chen,Chunyan Zhou,Liya Zhou,Binbin Luo,Qi Pang,Peican Chen,Xuetang Xu,Anxiang Guan
Developing efficient electrocatalysts capable of achieving effective electrochemical CO 2 -to-CH 4 conversion over a broad potential window remains a significant challenge in the field. Herein, we present a facile strategy for the synthesis of inverse CeO 2 /CuO catalysts through a hydrothermal approach, wherein CeO 2 nanodomains are supported on the surface of CuO. This catalyst exhibits exceptionally high CH 4 selectivity across the investigated voltage range, with a peak Faradaic efficiency of 63.6% and a corresponding partial current density of −472.9 mA cm −2 at −1.6 V vs. RHE, while the pure CuO catalyst without CeO 2 component was found to be active for electroreducing CO 2 to C 2+ products (C 2 H 4 ), as the adjacent Cu sites were beneficial for adsorbing multiple *CO intermediates and subsequent C C coupling. The incorporation of CeO 2 into Cu 1 Ce 9 -O x exerts a dual regulatory effect, synergistically suppressing C C coupling by reducing *CO coverage and optimizing *CO protonation kinetics for enhanced CH 4 selectivity. The presence of CeO 2 not only blocks the active sites of CuO for CO 2 -to-*CO intermediate conversion (thus lowering *CO coverage) but also facilitates water dissociation to generate abundant *H species, which subsequently migrate to Cu sites in Cu 1 Ce 9 -O x catalyst through the coherent interface between CuO and CeO 2 . These *H species subsequently facilitate the hydrogenation of *CO intermediates, ultimately resulting in CH 4 formation. Density functional theory (DFT) calculations demonstrate that CuCe-O x catalyst with strong H 2 O dissociation capability decreases the energy barrier for *CHO formation and favors *CO → *CHO conversion, thereby promoting CO 2 RR-to-CH 4 conversion. This work provides an effective strategy to enhance *H generation and the hydrogenation of *CO intermediates, thereby offering a feasible approach to improve CH 4 production efficiency in electrochemical CO 2 conversion. Compared with pristine CuO, CeO 2 nanodomains anchored on CuO surfaces redirect CO 2 electroreduction selectivity from C 2 H 4 to CH 4 . The presence of CeO 2 not only modulate *CO intermediate coverage but also accelerate H 2 O dissociation to produce abundant *H species, thereby promoting *CO protonation and boosting CH 4 formation with enhanced Faradaic efficiency. Download: Download high-res image (170KB) Download: Download full-size image
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Muhammad Khalid Hussain,N.R. Khalid,M.B. Tahir,Muhammad Tanveer,Tahir Iqbal,Maira Liaqat
A novel ternary ZnO/CuO/MoO 3 (ZnO/CuO/M) heterojunction photocatalysts with the nanorods morphology was synthesized by facile hydrothermal treatment . The surface morphology as nanorods, optical properties , photogenerated separation/transfer of charge carriers and photocatalytic properties were characterized for all developed photocatalysts. The photodegradation of organic pollutants including rhodamine B (RhB) and alizarin yellow (AY) dyes was studied under the visible light irradiance. The ternary ZnO/CuO/M nanorods revealed improved photocatalytic performance than pristine ZnO, CuO, MoO 3 and binary CuO/M composite. Amongst all ternary ZnO/CuO/M photocatalysts displayed the best photocatalytic activity for RhB (97%) and AY (79%) dyes within 120 min, which is 57 times and 64 times higher than that of pristine MoO 3 . Reactive trapping experiments were also executed qualitatively to perceive the characters of different active species for both dyes degradation. The improved photocatalytic presentation could be credited to the development of the ZnO/CuO/M heterojunction photocatalysts, which is advantageous for efficient fast transfer and separation of the photoexcited charge carriers.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Qing He,Meiling Guo,Juan Shu,Hua Hu,Hongwei Su,Guilong Yan,Zhenyu Li,Li Wang,Dong Xiang,Chunxia Zhao,Yuanpeng Wu,Wei Wang,Jingyu Chen
High mechanical filtration membranes, which can continuously and durably separate surfactant-stabilized viscous and light/heavy-mixed oily emulsions with high separation efficiency, are highly desirable for existing oily wastewater remedy. Herein, an all inorganic FM, by decorating CuO microrods standing on stainless steel mesh (SSM), has been designed to fulfill this challenge. Our FM exhibits both superwetting surface and high mechanical performance (tensile strength: ∼250 MPa). Furthermore, driven by the robust thermal stability of our FM (≥ 800 °C at oxygen atmosphere), combustion ( <10 s ) via alcohol flame, can be used to solve the oil fouling issue without deteriorating their original filtration performance. Prompted by these advantages aforementioned, our FM displays high oil rejection efficiency (>99 %) towards diverse surfactant free/−stabilized oil-in-water emulsions with good flux (> 10,500 L m −2 h −1 bar −1 ) via dead-end setup in millilitre-scale. Besides, continuous and durable separation of surfactant stabilized viscous (soybean oil) and light (hexane)/heavy (dichloroethane)-mixed oil/water emulsions in liter-scale with good cycling stability and same separation efficiency compared to these of emulsions via dead-end setup in millilitre-scale aforementioned, has been also achieved. These outstanding functions make our FM hold excellent potential for practical complex oily wastewater purification.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Chuanqiang Li,Xiang Liu,Xinyu Yang,Tao Peng,Yuqin Li,Maowen Chen,Chuanchuan Lin,Jing Jiang,Ziyu Su,Weijian Kong,Yang Wang
Tetragonal multilayered ZnO/CuO composites prepared by the annealing of a Zn- and Cu-containing pillar-layered metal-organic framework were characterized by using instrumental techniques and investigated as catalysts for the degradation of 4-nitrophenol (4-NP) under irradiation with UV–vis light. The as synthesized samples contained p-n junctions, amorphous-crystalline heterojunctions , which benefitted light absorption and charge separation. The calcination temperature significantly influenced both the physicochemical properties and photocatalytic activities of these composites. The sample obtained at 400 °C (TL-ZC-400) exhibited the best photocatalytic performance, achieving a 4-NP degradation efficiency of 93.93% after 40 min of illumination. The TL-ZC-400 still showed high photodegradation ability (97.2%) after four times recycling. Furthermore, the recombination of ZnO and CuO adjusted the band gap structure of TL-ZC-400. Radical trapping experiments showed that the degradation of 4-NP was mainly mediated by hydroxyl radicals and holes. A possible photocatalytic mechanism was also proposed in this study.
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Ying Liu,Lijun Qiu,Qingwei Nan,Jie Wang,Joe R. Zhao,Tingzhen Li,Chuanbo Hu,Lei Hu,Jianting Tang,Xiao Liu
Peroxymonosulfate activated heterogeneous Fenton-like catalytic reactions are promising in degradation of recalcitrant pollutants. Mesoporous silicas supported high-dispersion Cu species, as a kind of conventional heterogeneous catalysts for extensive applications, are rarely studied for their degradation efficiency in peroxymonosulfate-triggered reactions. In this work, one-pot incorporation method was employed to generate simultaneously Cu single-atom, Cu nanoparticles in mesoporous silicas (like the sample of Cu/Si-3 with 0.68 wt% of Cu) using sodium copper chlorophyllin as Cu source by calcining directly in air atmosphere. Several characterizations confirm the coexistence of Cu single-atom, Cu nanoparticles and mesopore with uniform size distribution. Activated by peroxymonosulfate, Cu/Si-3 was found to be efficient in degradation of tetracycline throughout a wide pH range of 2–11. The radicals of S O 4 g − , ⋅ O H and O 1 2 played their role in the degradation reaction. The underlying catalytic mechanism of the Fenton-like reaction was speculated on the basis of analysis of reactive oxygen species. This work has important implication in reasonable design and fabrication of catalysts with high-dispersion metal and controllable synthesis of functional mesoporous materials , as well as in proper disposal of recalcitrant pollutants including tetracycline.
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2019
·Vol. 9
·期 9
·724
·
IF 3.444
Yan Cui,Leilei Xu,Mindong Chen,Chufei Lv,Xinbo Lian,Cai-e Wu,Bo Yang,Zhichao Miao,Fagen Wang,Xun Hu
CuO-based catalysts are usually used for CO oxidation owing to their low cost and excellent catalytic activities. In this study, a series of metal oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2)-doped CuO-based catalysts with mesoporous Ce0.8Zr0.2O2support were simply prepared by the incipient impregnation method and used directly as catalysts for CO catalytic oxidation. These mesoporous catalysts were systematically characterized by X-ray powder diffraction (XRD), N2physisorption, transmission electron microscopy (TEM), energy-dispersed spectroscopy (EDS) mapping, X-ray photoelectron spectroscopy (XPS), and H2temperature programmed reduction (H2-TPR). It was found that the CuO and the dopants were highly dispersed among the mesoporous framework via the incipient impregnation method, and the strong metal framework interaction had been formed. The effects of the types of the dopants and the loading amounts of the dopants on the low-temperature catalytic performances were carefully studied. It was concluded that doped transition metal oxides could regulate the oxygen mobility and reduction ability of catalysts, further improving the catalytic activity. It was also found that the high dispersion of rare earth metal oxides (PrO2, Sm2O3) was able to prevent the thermal sintering and aggregation of CuO-based catalysts during the process of calcination. In addition, their presence also evidently improved the reducibility and significantly reduced the particle size of the CuO active sites for CO oxidation. The results demonstrated that the 15CuO-3Fe2O3/M-Ce80Zr20 catalyst with 3 wt. % of Fe2O3showed the best low-temperature catalytic activity toward CO oxidation. Overall, the present Fe2O3-doped CuO-based catalysts with mesoporous nanocrystalline Ce0.8Zr0.2O2solid solution as support were considered a promising series of catalysts for low-temperature CO oxidation.Keywords:CuO-based catalyst;Fe2O3dopant;mesoporous Ce0.8Zr0.2O2solid solution;low-temperature catalytic activity;CO oxidation
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Kang Zou,Yamin Fu,Ruiying Yang,Xiaohua Zhang,Cuicui Du,Jinhua Chen
By direct calcination of Cu 2+ -doped ZIF-8 in oxygen atmosphere, a new photoelectric material, CuO–ZnO heterojunction , was prepared. The morphology and structure were investigated in detail by several methods, such as scanning electron microscopy, transmission electron microscopy , nitrogen adsorption-desorption method and X-ray diffraction. Under visible light irradiation , CuO–ZnO heterojunction exhibits excellent PEC behavior in aqueous media with the presence of ascorbic acid (AA) and dissolved oxygen at −0.3 V. Taking the CA125-antibody functionalized CuO–ZnO heterojunction (CuO–ZnO-Ab 2 ) as a signal source, a novel photoelectrochemical (PEC) immunosensing platform was developed for ultrasensitive assay of CA125. Because of the target-induced introduction of photoelectric material to the sensing platform, the proposed PEC immunosensor has excellent performance for CA125 assay: near-zero background noise, wide linear response range (1 × 10 −5 U/mL to 100 U/mL) and low detection limit (3.16 × 10 −6 U/mL). The developed CuO–ZnO heterojunction and the related PEC sensing platform may have promising applications in ultrasensitive and highly accurate monitoring of various proteins in bioanalysis and disease diagnosis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）