MICROCHIMICA ACTA
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2022
·Vol. 189
·期 3
·1-10
·
IF 6.408
Xu Yaxin,Li Peipei,Zhu Yu,Tang Ying,Chen Haoyu,Zhu Xiaohua,Wu Cuiyan,Zhang Youyu,Liu Meiling,Yao Shouzhuo
A novel nanocomposite of CuO nanoparticle-modified Zr-MOF (CuO/UiO-66) was synthesized and developed as a fluorescence nanoplatform for H 2 O 2 and adenosine triphosphate (ATP) via the “turn-on–off” mode in the presence of terephthalic acid (TA). The structure of CuO/UiO-66 was thoroughly characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and other techniques. The CuO/UiO-66 with enhanced peroxidase-like (POD) activity obtained due to the Zr 4+ in UiO-66 is beneficial to the aggregation of CuO NPs on its surface. As a result, the strengthened fluorescence at 425 nm with the excitation of 300 nm was found due to the highly fluorescent species of TAOH. This is produced by the oxidation of TA by ·OH that came from the catalysis of H 2 O 2 via the peroxidase mimic of CuO/UiO-66. Hence the modification of CuO NPs on porous UiO-66 can provide a friendly and sensitive physiological condition for H 2 O 2 detection. However, upon addition of ATP, the fluorescence intensity of TAOH at 425 nm effectively declined owing to the formation of complexation of Zr 4+ -ATP and the interaction of CuO to ATP which hampers the catalytic reaction of CuO/UiO-66 to H 2 O 2 . The specific interaction induced “inhibition of the peroxide-like activity” endows the sensitive and selective recognition of ATP. The detection limits were 16.87 ± 0.2 nM and 0.82 ± 0.1 nM, and linear analytical ranges were 0.02–100 μM and 0.002–30 μM for H 2 O 2 and ATP, respectively. The novel strategy was successfully applied to H 2 O 2 and ATP determination in serum samples with recoveries of 97.2–103.8% for H 2 O 2 and 97.6–101.7% for ATP, enriching the avenue to design functional MOFs and providing new avenue of multicomponent bioanalysis. Graphical abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Peizhen Yang,Songrong Li,Liang Xiaofu,An Xiaojing,Dongfang Liu,Wenli Huang
The degradation of organic contaminants via traditional radical-dominated advanced oxidation processes (AOPs) under high salinity conditions was limited due to side reactions between coexisting inorganic anions and radicals. Herein, a nonradical oxidation process via peroxymonosulfate (PMS) activation by CuO/MXene for treating high-salinity organic wastewater was developed. Rapid removal efficiency of target pollutant carbamazepine (CBZ) was significantly enhanced to 95.88% within 20 min by CuO/MXene under high salinity conditions (NaCl, 200 mM), compared to the efficiency of 4.30% exhibited by PMS alone. Besides, CBZ maintained a higher removal efficiency of > 81.04% in complex highly saline wastewater composed of eight common inorganic anions. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis confirmed that radical and nonradical oxidation processes were involved in the catalytic process. However, singlet oxygen ( 1 O 2 ) was identified as the primary reactive species, and its contribution rate to CBZ degradation was > 73.58% in a wide pH range (3.0-9.0). The oxygenated functional groups and the interaction between CuO/MXene and PMS facilitated the production of 1 O 2 . The degradation pathway was proposed based on the detection of intermediates. This work provided a new inspiration for the decontamination of organic contaminants under high salinity conditions via a nonradical oxidation process.
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Acta Metallurgica Sinica-English Letters
·
2020
·Vol. 34
·期 1
·85-97
·
IF 2.09
Liu Tao,Chen Yuejiao,Chen Libao
Developing excellent pseudocapacitive electrodes with long cycle, high areal capacity and large rate has been challenged. 3D printing is an additive manufacture technique that has been explored to construct microelectrodes of arbitrary geometries for high-energy–density supercapacitors. In comparison with conventional electrodes with uncontrollable geometries and architectures, 3D-printed electrodes possess unique advantage in geometrical shape, mechanical properties, surface area, especially in ion transport and charge transfer. Thus, a desirable 3D electrode with ordered porous structures can be elaborately designed by 3D printing technology for improving electrochemical capacitance and rate capability. In this work, a designed, monolithic and ordered multi-porous 3D Cu conductive skeleton was manufactured through 3D direct ink writing technique and coated with CuO nanosheet arrays by an in situ electro-oxidation treatment. Benefiting from the highly ordered multi-porous nature, the 3D-structured skeleton can effectively enlarge the surface area, enhance the penetration of electrolyte and facilitate fast electron and ion transport. As a result, the 3D-printed Cu deposited with electro-oxidation-generated CuO (3DP Cu@CuO) electrodes demonstrates an ultrahigh areal capacitance of 1.690 F cm −2 (38.79 F cm −3 ) at a large current density of 30 mA cm −2 (688.59 mA cm −3 ), excellent lifespan of 88.20% capacitance retention after 10,000 cycles at 30 mA cm −2 and superior rate capability (94.31% retention, 2-30 mA cm −2 ). This design concept of 3D printing multi-porous current collector with hierarchical active materials provides a novel way to build high-performance 3D microelectrodes.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bala Ismail Adamu,Attia Falak,Yi Tian,Xinghua Tan,Xiangmin Meng,Peipei Chen,Hanfu Wang,Weiguo Chu
High sensitivity, low limit of detection (LOD), and short response and recovery times at room temperature (RT) are critical for gas sensors. For NO2, different binary metal oxide-based sensors were developed to achieve superior performance at elevated temperatures instead of RT. Herein, we report on CuO@CuO and Cu3Mo2O9@CuO sensors with CuO and Cu3Mo2O9 micro/nanorods vertically aligned on the CuO layers, which were directly fabricated using a facile, low-cost, and catalyst-free chemical vapor deposition (CVD) technique. Their sensing performance tests revealed that the Cu3Mo2O9@CuO p–p heterojunction sensors exhibited a high response of 160% to 5 ppm NO2, an excellent sensitivity of 50% ppm–1, a low LOD of 2.30 ppb, a short response time of 49 s, and a rapid recovery of 241 s at RT, obviously better than those for CuO@CuO sensors. The superior performance of Cu3Mo2O9@CuO sensors could be attributed to the Schottky heterojunction formed between p-Cu3Mo2O9 micro/nanorods and p-CuO films, the catalytic effect, and the anisotropic nature of Cu3Mo2O9 micro/nanorods. This study not only provides a simple, low-cost, and batchable fabrication method of homo/heterojunction sensors with micro/nanorods vertically aligned on films but also opens an avenue for sensor design by tuning the Schottky barrier height to enhance RT performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Litong Chen,Zeyu Yang,Yuling Yang,Xuxuan Yang,Gang Wang,Lijing Zhu,Zhixiang Zeng
Solar-driven evaporators with vertical channels usually exhibit excellent desalination due to the fast water transportation and excellent salt tolerance, which are often fabricated via a directional liquid nitrogen-assisted ice templating method and freeze-drying process. However, they are reliant on a very limited number of water-soluble polymers and hydrophilic inorganic materials, and the freeze-drying process costs a long time and much energy. A highly efficient and straightforward process for the fabrication of solar-driven evaporators with directional channels from water-insoluble materials is urgent. Here, water-insoluble polyvinylidene fluoride was dissolved in dimethyl sulfoxide (DMSO), and then the solution was engineered to PVDF scaffolds by the combination of directional DMSO crystallization with the commonly porous membrane formation method of non-solvent (water) induced phase separation. The result is the creation of oriented perpendicular pores to the surfaces and framberry-like microparticles on the pore walls. After the in situ deposition of urchin-like CuO particles with high solar adsorption on PVDF scaffolds, PVDF/CuO solar-driven evaporators have been successfully constructed. The evaporate rate depends on the PVDF content and CuO loading. Briefly, PVDF/CuO evaporators fabricated from high PVDF content of more than 3 wt% have low porosity, slow water supply, and poor hydrophilicity, resulting in a low evaporate rate and high evaporation enthalpy. The optimized 3D PVDF/CuO evaporator (V3-9 h) with a PVDF content of 3 wt% and CuO loading of 31.3 ± 1.6 wt% has a high pure water evaporation rate of 3.2 ± 0.2 and 3.5 ± 0.3 kg m -2 h −1 under sun illumination at 1 and 2 kW m −2 , respectively. And the evaporation enthalpy is as low as 1083.8 ± 25.5 J/g, 55 % lower than pure water. Moreover, the sample exhibits a similar evaporation rate in 3.5 wt% NaCl solution because the verticle channels endow the evaporator with excellent salt tolerance. The facile and scalable fabrication process of solar-driven evaporators with directional channels will greatly boost the development of cost-effective desalination.
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MATERIALS CHEMISTRY AND PHYSICS
·
2026
·
IF 5.2
Zilong Liang,Zhiwei Luo,Ping Zhang,Qian Zhao,Yuchun Zhang
Carbon monoxide (CO) can rapidly accumulate in confined environments such as tunnel fires, posing an acute poisoning risk and demanding catalysts with low-temperature light-off and fast purification capability. Here, we construct a porous mixed-oxide framework from a Ce–Co metal–organic framework precursor and subsequently load 7 wt% CuO, yielding CuO@Co x Ce 1−x –O composite catalysts. Tricobalt tetraoxide (Co 3 O 4 ), Cerium dioxide (CeO 2 ) and Copper (II) oxide (CuO) are deliberately selected to couple reversible oxygen storage/defect regulation (Ce 4+ /Ce 3+ ), low-temperature redox cycling (Co 3+ /Co 2+ ), and interfacial charge-transfer sites for CO activation (CuO). Meanwhile, the MOF-derived strategy enables homogeneous component dispersion, abundant porosity, and intimate heterointerfaces, thereby maximizing interfacial synergy. Among the series, CuO@ Co 8 Ce 2 –O (Co:Ce = 8:2) exhibits the best performance, decreasing the temperature required for 90% CO conversion by 216 °C relative to the undoped counterpart and maintaining stable activity during prolonged operation. Correlating micromorphology, surface physicochemical properties, and redox/oxygen-mobility behavior reveals that moderate Ce incorporation increases defect-associated reactive oxygen species and accelerates oxygen transport, while strengthened Ce–Co electronic coupling further promotes interfacial synergy at the CuO–oxide junctions. Mechanistic evidence supports a Mars–van Krevelen pathway with dynamically regenerated interfacial oxygen vacancies, enabling rapid CO oxidation. This work provides a rational interface-engineering strategy for efficient CO purification in confined fire-related scenarios.
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OPTICAL MATERIALS
·
2022
·
IF 3.754
Cheng Zuo,Xishi Tai,Qian Su
S-scheme heterojunction can accelerate the separation of photogenerated electron-hole pairs and retain strong redox ability, so it has outstanding advantages and application prospects in the field of photocatalysis . The Ce 3+ self-doping CeO 2-x @CuO nanowires arrays on copper mesh were synthesized with the strategy of surface hydrogenation and hydrothermal calcination method. The morphology, composition and properties of the catalysts were determined by SEM, TEM, EDS , UV-VIS, PL , CO 2 -TPD and other characterization methods. Ce 3+ self-doping introduces O vacancies on the surface of CeO 2 without introducing heteroatoms. The O vacancies of CeO 2-x could enhance the adsorption, activation and reduction of CO 2 . The existence of coaxial S-scheme heterojunctions could effectively enhance the light absorption range and the separation of photo-generated charges. The photocatalytic activity of the composite catalyst was much higher than that of pure CuO/copper mesh (CM) and CeO 2 , and the difference in activity of catalysts composed of different proportions was studied. When the Ce 3+ self-doping CeO 2-x loading was moderate, the methanol yield reached 6.73 μmol·g cat −1 after 4 h reaction under visible light , which is 5.26 times of CuO/CM and 9.35 times of CeO 2 . The reduction mechanism of the composite catalyst at the gas-liquid interface was studied. This work demonstrates a feasible strategy to create efficient S-scheme heterojunction photocatalysts with rich active surface O vacancies for photocatalytic CO 2 reduction.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Xun Zhou,Yongxiang Wu,Yao Jiang,Chen Li,Longping Xu,Peng Cui,Xinsong She
Integrated one–dimensional CuO–nanowire arrays/Cu–foam (CuO–NWAs/Cu–foam) nanostructure, which was fabricated by oxidation and calcination, has been newly utilized as non–enzymatic electrocatalytic electrode for exploring histamine level. Under optimal condition of pH at 13 and potential at 0.55 V ( vs Ag/Ag/Cl), the sensitivity of CuO–NWAs/Cu–foam electrode towards non–enzymatic electrochemical histamine determination presented as high as 12.94 mA mM −1 cm −2 , linear range spanned between 0.5 and 1046 μM, a detection limit (S/N = 3) was about 44 nM. The unprecedented causes of ultrahigh sensitivity were physically contributed to enhancing active surface area and declining charge transfer resistance. More crucially, the outstanding selectivity, stability and reproducibility facilitated its practical capacity on evaluating histamine levels in different–bacteria fermented mandarin fish, which triggered the potential feasibility for commercializing non–enzymatic electrochemical determination of histamine with high sensitivity, reliable precision and low expenditure.
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ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Jieyu Hu,Xingxing Yu,Xiumei Zhuang,Yan Sun,Junjie Wang,Haiting Ren,Shenghao Zhang,Yueshou Zhang,Hongxing Qiu,Yongjun Hu
The p53 gene is a known cancer marker. We report a novel protocol for the SERS tandem strategy to detect the p53 gene with high sensitivity. Herein, the click reaction between azide and alkyne was catalyzed by utilizing copper oxide nanoparticles (CuONPs), which were enriched by a T-DNA-triggered hybridization chain reaction (HCR). The T-DNA signal was amplified by establishing the correlation between the T-DNA signal and the concentration of CuONPs in a nonenzymatic isothermal environment. In contrast to other Raman reporters, we used alkynyl compounds as Raman reporters, which showed excellent characteristics in the Raman-silent region (1800–2800 cm −1 ). Therefore, the highly sensitive and highly selective SERS signals could be obtained in complex biological matrices. Due to utilizing multistep amplification strategies, including the nanoparticle-modified HCR polymer and “click” reaction, the limit of detection (LOD) and the limit of quantification (LOQ) of this sensor could be as low as 0.0174 pM and 0.0583 pM, respectively. The accuracy of the strategy expressed as the RSD was in the range of 3.14%–6.21%. The results indicated that the constructed sensor has excellent performance for the detection of the p53 gene in serum samples in a low concentration range, which suggests that the proposed enzyme-free SERS analytical sensor has good clinical application prospects.
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Materials Advances
·
2021
·Vol. 3
·期 1
·672-681
·
IF 0
Ziyang Zhu,Chuanying Wei,Di Jiang,Xinru Wu,Min Lu
In this study, two-component composites consisting of transition metal copper oxide (CuO) and graphite carbon nitride (g-C3N4) were successfully synthesized. Firstly, a typical metal–organic framework (MOF) material, namely CuBTC, was prepared by the hydrothermal method. Then, the hollow porous CuO/g-C3N4 composite with an octahedron structure was obtained by introducing a certain amount of g-C3N4 into the system using ultrasonic treatment and rapid thermal annealing. The synthesized CuO/g-C3N4 not only retains the unique octahedral morphology of the CuBTC template, but also is coated by a uniform carbon layer. This CuO/g-C3N4 displays a high reversible specific capacity (1530.4 F g−1, 2 A g−1) as an anode material. In addition, an asymmetric supercapacitor assembled with self-made NiCoMOF as the cathode and CuO/g-C3N4 as the anode achieves an excellent energy density of 50.8 W h kg−1 at a power density of 800 W kg−1 and stable cycling performance (70.1% capacity retention over 3000 cycles). These outstanding electrochemical properties are attributed to the synergistic effect between transition metal oxides and carbon-based materials as well as the unique structure of the composites, which also provides a facile design and synthesis idea to construct high-performance transition metal compounds with a unique hollow structure and C-coating for developing asymmetric supercapacitors with high energy and power densities.
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ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Shen-Gen Gong,Yan-Hong Shi,Yang Su,Yan-Fei Li,Lei Ding,Jian Lin,Guo-Duo Yang,Bing Li,Xing-Long Wu,Jing-Ping Zhang,Hai-Ming Xie,Hai-Zhu Sun
Flexible asymmetric supercapacitor (FASC) systems are expected to exhibit not only excellent energy storage properties and safety but also satisfactory flexibility and robust integration. However, tremendous issues such as low capacitance, narrow voltage window, and poor mechanical properties still exist. In this paper, a novel kind of 3D lamellar Mn(OH)2 nanosheets on Cu-plated carbon cloth with a core-shell integrated framework (CPCC@CuO@Mn(OH)2) is fabricated to obtain the flexible material in the FASC. In this unique CPCC@CuO@Mn(OH)2 electrode material, the high theoretical specific capacity of CuO and Mn(OH)2 brings superior energy storage properties. Meanwhile, as the shell part, the deposited Mn(OH)2 layer and coated CuO layer work as both capacity contributors and substrate protectors, simultaneously maintaining the high capacitance and satisfactory flexibility of the electrodes. Therefore, the capacitance successfully achieves around 8140 mF cm–2 under 0.5 mA cm–2. Significantly, the assembled FASC (named as CPCC@CuO@Mn(OH)2//CC@AC) achieves a working voltage of up to 2.4 V. In the case of a high-power density close to 34.31 mW cm–3, its energy density reaches around 6.29 mW h cm–3. Moreover, the capacity holds 88.9% even after 10,000 cycles, showing its great application potential in the field of wearable electronics.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Yangyang Li,Yongqi Wang,Dumei Ma,Chuan-Fan Ding,Yinghua Yan
Enhancing the ionization efficiency of saccharides remains a significant challenge in matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Herein, novel MOF-derived erythrocyte-like CuO/Cu2O@ZnO–CN nanomaterials were designed as a MALDI matrix for various saccharides’ detection. The ZIF-8-derived ZnO framework maintained its intrinsic porosity while gaining uniformly distributed C/N-doped catalytic sites. Copper oxides integration further induced an erythrocyte-like morphology with a substantially larger surface area. The CuO/Cu2O@ZnO–CN matrix demonstrated superior performance over conventional CHCA and DHB in LDI-MS analysis of saccharides (Xyl, Glc, and Malt), featuring the advantages of excellent conductivity and stability, minimum background interference, excellent ionization efficiency, high salt and protein tolerance, and remarkable specificity. The developed method enabled accurate glucose quantification in human serum (0.5–9 mM linear range, R2 = 0.998) with a low limit of detection (LOD) of 0.28 mM via internal standardization. Good reproducibility and reliability of the method were verified by intraday (1.7–5.6%) and interday precision (2.2–8.2%) and accuracy (93.8 to 101.6%). Analysis of glucose of human serum from healthy people and diabetes patients indicated the matrix’s potential application in clinical analysis.
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