CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Tianyi Sun,Zhiwei Zhao,Zhijie Liang,Jie Liu,Wenxin Shi,Fuyi Cui
A bifunctional CuO-Fe 3 O 4 material was synthesized and employed for the photocatalytic degradation of p-arsanilic acid (p-ASA) under visible light irradiation and simultaneous removal of the released inorganic arsenic by adsorption from solution. The effects of major factors, including solution pH, bicarbonate ion, halide ion and humic acid , on the p-ASA degradation were investigated. Under various water quality conditions, an excellent removal of p-ASA could always be achieved by the CuO-Fe 3 O 4 photocatalytic process and p-ASA could be completely converted to As(V) within 36 min. Simultaneously, the released As(V) could be adsorbed onto the surface of CuO-Fe 3 O 4 nanoparticles with high efficiency above 95% at initial pH range from 4 to 7. The presence of humic acid significantly weakened the degradation of p-ASA by scavenging OH, and slightly inhibited the As(V) removal. On the basis of the UV–vis, FTIR, XPS analysis and the major degradation products detected, the mechanism of the p-ASA photocatalytic degradation and the released As(V) adsorption by CuO-Fe 3 O 4 nanoparticles was given, and the degradation pathway of p-ASA during the photocatalytic process was also taken into consideration. Combined with the photocatalytic property and the high adsorption capacity of As(V), the synthesized magnetic CuO-Fe 3 O 4 nanoparticles have significant potential applications for controlling the risk of p-ASA in 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
Materials Science & Engineering C-Materials for Biological Applications
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2017
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IF 4.164
Jing Yang,Wensheng Tan,Chuanxiang Chen,Yongxin Tao,Yong Qin,Yong Kong
CuO nanoparticles decorated N-doped graphene aerogel (NGA-CuO) was facilely synthesized via a mild hydrothermal method followed by freeze-drying and calcination, which was characterized by TEM, FT-IR, XPS, XRD and electrochemical impedance spectroscopy (EIS). The obtained NGA-CuO was used for the construction of a nonenzymatic sensing platform for glucose, exhibiting wide linear range, low detection limit, high sensitivity, reproducibility, selectivity and stability. The excellent analytical performances of the NGA-CuO based glucose sensor might be attributed to the synergistic effect of CuO nanoparticles and N-doped graphene aerogel (NGA). The practical applications of the proposed sensor was verified by determining glucose concentrations in five human serum samples, and the obtained results were quite comparable to those measured on the standard clinical instrument.
研究领域:
材料科学
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分析化学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Yongjun Shen,Yunli Wang,Kaixia Fan
ABSTRACT Acid turquoise blue A (ATBA) is treated by the combined dielectric barrier discharge (DBD) plasma and AC supported CuO (CuO/AC). CuO/AC is prepared by incipient wetness impregnation method. X-ray diffraction, N 2 adsorption/desorption isotherm, and scanning electron microscope are used to characterize the CuO/AC. Interactive effects of initial pH, conductivity value, input power, and CuO/AC dosage on the decolorization rate of ATBA are investigated. The predicted decolorization rate of ATBA reaches to 97.12% under the optimal condition, only have 1.95% error compared with the experimental value (95.87%). The possible coupling mechanisms of combined DBD plasma and CuO/AC are proposed.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
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2018
·Vol. 186
·期 1
·1-9
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IF 5.705
Huang Yanli,Tan Yi,Feng Chuanqi,Wang Shiquan,Wu Huimin,Zhang Guangxue
The preparation of 3 kinds of carbonaceous nanocomposites by hydrothermal treatment and subsequent calcination described. The first comprises a nanomaterial of type CuO/g-C 3 N 4 , with g-C 3 N 4 in mass fractions of 2, 5 and 7 wt%, respectively. The second comprises CuO/porous carbon (5 wt%), and the third comprises CuO/carbon spheres (5 wt%). All of them were employed to modify a glassy carbon electrode (GCE) to obtain electrochemical sensors for glucose and dopamine. The GCE modified with CuO/g-C 3 N 4 (5 wt%) displays the highest electrocatalytic activity towards glucose and dopamine. Figures of merit for sensing glucose (in 0.1 M NaOH solution) include a wide linear range (0.5 μM to 8.5 mM), a detection limit of 0.150 μM, and a sensitivity of 0.274 μA·μM −1 ·cm −2 (at a working potential of 0.60 V vs. Ag/AgCl). The respective data for dopamine (in pH 7.0 solution) are linear ranges from 0.2-16.0 μM and 16.0-78.7 μM, a lower detection limit of 60 nM, and an electrochemical sensitivity of 0.834 and 0.331 μA·μM −1 ·cm −2 (at a working potential of 0.22 V vs. Ag/AgCl). The good performance of the modified GCE is attributed to the synergetic interactions between CuO and the appropriate fraction of g-C 3 N 4 , and the improvement of conductivity.
Schematic presentation of a electrochemical sensor based on CuO/g-C 3 N 4 for the determination of glucose and dopamine.
研究领域:
分析化学
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材料科学
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生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Dongyu Pei,Hanbo Wang,Sheng Wan,Ziming Wang,Mingrui Yu,Zhenlu Wang,Haiyan Lu
Despite its high theoretical specific capacitance and low cost, copper oxide still suffers from insufficient utilization of active sites and poor cyclic stability when applied in asymmetric capacitors. In this work, micron-sized CuO electrode has been successfully obtained using nickel foam as substrate through an electrodeposition method. By optimizing the electrodeposition potential and designing structure, the CuO microsphere electrode delivers a high specific capacitance of 985 F g −1 at 1 A g −1 . Furthermore, the asymmetric capacitor assembled with CuO electrode and activated carbon electrode exhibits a maximum energy density of 44.5 Wh kg −1 at 1600 W kg −1 and a long lifespan of 93.4% capacitance retention after 10000 cycles at 5 A g −1 . These results demonstrate that the microsphere structure contributes to maintaining excellent structural stability during long cycles and then facilitate their electrochemical kinetics and capacitive performances. This work presents a novel strategy for designing and enhancing micron-sized positive electrodes for high-performance asymmetric capacitors.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2021
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IF 7.963
Ziyu Zhao,Meixuan Wu,Dandan Zhou,Quan Chen,Hao Li,Di Lang,Bo Pan,Baoshan Xing
Environmentally persistent free radicals (EFPRs) have recently attracted a great deal of research attention because of their significant toxicity and ubiquitous occurrence in the environment. The information is still very limited on how to estimate the intensity of EPFRs under ambient circumstances. This study is designed to specifically compare EPFRs generation during catechol degradation in dark and UV light irradiation. CuO and TiO 2 were selected as model metal oxides to coat on silica at 1% CuO has a large electron exchange capacity, which may mediate catechol degradation in dark, while TiO 2 possesses strong photocatalytic property and could accelerate catechol degradation under UV light. Under UV light irradiation, EPFRs were generated very quickly and reached the maximum value in 4 d, which was related to the photocatalytic property of the particle. However, these EPFRs dissipated quickly in 14 d. On the contrary, the intensities of EPFRs generated in dark were 2 times higher, and stabled for over 2 months. Therefore, the environmental impacts of EPFRs in dark may be widespread and long-lasting, which should be monitored more carefully. It should be noted that for CuO-coated silica, a significant amount of EPFRs (20% of the maximum) survived the UV-light irradiation and stabled during the experimental period (45 d). Stronger EPFRs were associated with more abundant dimer structures, suggesting the dimer structures were related to EPFRs formation during catechol degradation. Monitoring the generation of dimer structures in the degradation of organic chemicals may provide useful information to estimate EPFRs generation and risks.
研究领域:
环境科学
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2021
·
IF 3.739
Yuejiao Jiao,Song Han,Weidong Zhang,Min Guo,Fangqin Cheng,Mei Zhang
In this study, adsorbents were self-assembled using CuO-loaded hollow microspheres. Adsorption tests for H 2 S in biogas were performed at room temperature under dry atmosphere. The specific surface area of the adsorbent is 270 m 2 /g, with an adsorption capacity as high as 51.87 mg H 2 S/g, attributed to the well-developed adsorbent pore volume of 0.932 cm 3 /g, wherein mesopores and macropores accounted for 99.14%. In addition, nano-CuO, with a particle size of 5.34 nm, is evenly dispersed on the whiskers of the hollow spheres. These factors provide a good environment for H 2 S adsorption from biogas. The regeneration rate of the adsorbent after the third and fifth regenerations was approximately 80% and 60%, respectively, suitable for the removal of H 2 S from biogas at room temperature under dry atmosphere.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Yanhong Zhang,Hu Bai,Jiaming Chu,Haiyang Lan,Qi Zhou,Zixian Wang,Weitao Jin,Juan Zhou
A catalyst layer is coated on the fuel electrode in a proton-conducting solid oxide electrolysis cell reactor, which can optimize electrochemical performance and expand the application range of the reactor. In this work, CuO–ZnO catalyst is prepared by oxalate co-precipitation method and combined with a single cell to obtain a reactor with the structure of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) ǀ BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb) ǀ NiO-BZCYYb (active layer) ǀ NiO-BZCYYb (support layer) | CuO–ZnO (catalyst layer). The electrolysis current density of this reactor with humid air as oxidant and 20%CO 2 –80%H 2 as fuel is 2751 mA cm −2 under 1.3 V at 750 °C. It operates steadily for 138 h under 1.3 V electrolysis at 650 °C, which is better than the reactor without a catalyst layer under this condition. Additionally, CO and CH 4 are detected in the exhaust gas on the fuel electrode side, and the CO selectivity reaches over 90% at 750-550 °C.
研究领域:
材料科学
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能源科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CULTURAL HERITAGE
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2023
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IF 3.1
Lina Xie,Lan Yao,Bingjian Zhang,Yulan Hu
The moss colonization on the surface of historic buildings could result not only in a biodeterioration but also in an aesthetical damage. In this study, some mixtures of consolidant (MMH) and GO@CuO hybrids were developed to control moss growth on the surface of weathered sandstone. An innovative aspect of the study was that, by using GO as the intermediate, the CuO nanoparticles were anchored to the MMH consolidant. This method could effectively improve the binding force between CuO nanoparticles and the stone substrate and make it not be washed away by rainfall. Several formulations have been prepared, applied on weathered sandstone specimens, and tested in laboratory to investigate the impact of GO@CuO hybrids addition on consolidation performance. The complex consolidants were subjected to an antibiological activity assay to assess their capability to inactivate moss spores. The complex consolidants were also applied to the specimens covered with mosses. The obtained results demonstrated that the consolidant loaded with GO@CuO hybrids were effective in consolidating the weathered substrate and preventing moss growth on its surface. Additionally, the complex consolidant also had the function of controlling re-colonization of moss after conservation treatment.
研究领域:
文物保护
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材料科学
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微生物学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Liu Yang,Jing Li,Guoqiang Cao,Yiyan Yang,Wen Luo,Zhiqi Zhang,Lizhi Feng,Xinglai Zhang,Baodan Liu
This study reports on the development of highly-efficient Pt/CuO-Fe 2 O 3 /TiO 2 monolithic catalysts for the low-temperature conversion of NO to N 2 via CO-SCR. In this case, ultrathin TiO 2 nanosheet arrays are designed to in situ grow on flexible Ti mesh to provide more spaces/areas for the loading of highly-dispersed Fe 2 O 3 and CuO active components. Furthermore, Pt nanoparticles with an average size of 1.30 nm are effectively decorated on the surface of CuO-Fe 2 O 3 /TiO 2 . The H 2 -TPR and NO-TPD results demonstrate that the excellent synergistic effect between TiO 2 , CuO, Fe 2 O 3 and trace amounts of Pt is conducive to enhance the adsorption of NO and finally promote the CO-SCR. The obtained Pt/CuO-Fe 2 O 3 /TiO 2 catalysts exhibit excellent CO-SCR performance with 100 % NO conversion, and 100 % N 2 selectivity at 250 °C, showing great potential of de-NO x application by using toxic CO as reductant in industry.
研究领域:
环境科学
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催化材料
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
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IF 5.4
Runze Jin,Donghui Guo,Lijie Qu,Baosheng Xu
Toughening of epoxy resin (EP) is a common topic in the research of high-performance matrix for advanced composite materials. When the material is at extreme temperatures, the toughening requirements of EP will become more prominent. To this end, we designed a multi-scale interface to improve the strength and toughness of an EP at extreme temperatures simultaneously. A multi-scale interface layer was fabricated within the EP system using CuO nanorods (NRs) and epoxy-based cage-type polysiloxane (EP-POSS) as the toughening phase. By changing the content of CuO NRs and EP-POSS, regulating the multi-scale interface structure between the two, thereby further regulating the mechanical properties of the system. When the relative contents of the CuO NRs and EP-POSS were 1:1, the mechanical properties of EP/NP-CuO were optimised at room temperature(RT) and 77 K. The tensile strength increased by 75.9 % and 97.3 %, respectively, compared to the pure EP. The fracture toughnesses increased by 83.1 % and 58.9 %, respectively, compared to the pure EP. The improvement in mechanical performance is mainly attributed to the multi-scale interface structure between NP-CuO and EP, which effectively consumes the energy and stress required during deformation.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Junkai Hao,Jing Feng,Shuo Sun,Zhongxiang Cao,Wenjing Xu,Lei Hu,Wenli Yao,Zhengquan Yan
To reliably monitor dopamine (DA), a common neurotransmitter, a kind of nano CeO 2 /CuO modified carboxylated chitosan nanozyme (CeO 2 /CuO@CC) was constructed under microwave-assisted conditions. The proposed CeO 2 /CuO@CC exhibited superior synergistic- enhancement oxidase-like activity, with high specific surface area and superior stability. It could accelerate the oxidization of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue oxTMB in the air. What’s more, the presence of trace DA could exclusively change the enzyme-like activity of CeO 2 /CuO@CC, accompanied with visual color changes from blue to colorless. Under the optimized conditions, there expressed double ratiometric linear relationships between lg( A 652 / A 285 )/lg( A 370/ A 285 ) and c DA , with a large linear range between 6.0 × 10 −9 and 1.0 × 10 −5 M of DA. When applied for visual detection of DA in real samples, the detection limit was low to 2.0 × 10 −9 M with RSD % less than 4.14 %. The mechanisms for enhanced oxidase-mimic activity of CeO 2 /CuO@CC and its selective detection of DA were proposed. This work will offer an insight to design efficient nanozyme for visual detection of bio-analytes in practice.
研究领域:
生物化学
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材料科学
·
分析化学
✓ 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）