SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Waseem Abbas,Naeem Akhtar,Qinglei Liu,Tengfei Li,Imran Zada,Lulu Yao,Raheela Naz,Wang Zhang,Muhammad Ehsan Mazhar,Di Zhang,Dongling Ma,Jiajun Gu
Excessive usage of phenolic compounds such as catechol (Cat-), cresol (Cre-) and p- nitrophenol (PNP) in food processing and pharmaceutical industry may lead to severe health issues including nerve cells disruption and even infertility. Thus, designing sensitive nanoscale electrochemical sensors to boost single screen signalling of these phenolic compounds from environmental samples is highly demanded. However, control monitoring and quantification of these phenolic compounds from real samples such as commercially available pesticides and insecticides is quite challenging because of their low concentration along with excess of co-existing interfering species. Herein, for the simultaneous electrochemical monitoring of these phenolic pollutants, we fabricate C-encapsulated three-dimensional Cu nano-pyramids (C@3DCu-PY) through a simple, scalable freeze-drying and carbonization process . The resulting hybrid contains 3D arrangement of controlled Cu nano-pyramids with atomic arrangement along all four lateral faces with sharp apex which result in exposition of greater fraction of Cu {111} catalytic active sites, large number of sp 2 carbon atoms, and maximum surface defects along with dipolar/quadrupolar radiative plasmons, thus offering highly sensitive and selective behaviour toward simultaneous monitoring of Cat-, cresol and PNP. The designed C@3DCu-PY electrode also shows fast diffusion and kinetics of ions compared to C@almond (AL)-like Cu nanoparticles (NPs) sample, thus indicating shape dependent efficacy of the designed electrode. Because of high sensitivity, the developed novel C@3DCu-PY electrode was successfully applied to monitor PNP from commercially available insecticide. The results demonstrated the potential of the designed electrode to be used in preventing serious health issue associated with phenolic pollutants.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Yang Chen,Chengyin Yang,Xiaoqing Wang,Jiangfeng Yang,Jinping Li
Solvent-evaporated conversion (SEC) and steam-assisted conversion (SAC) have been developed to prepare the typical metal-organic frameworks (MOFs) Cu-BTC (HKUST-1) and ZIF-8 using a unique solvent recovery strategy using zeolite. As a green circulation medium, zeolite Na-4A loading and removal of solvent (H 2 O and EtOH) can transport solvent in the vapor phase and avoid solvent condensation, which was the defect in previous SAC syntheses of MOFs, and achieves efficient solvent recovery as well as being an economical and green synthetic process. Moreover, SEC and SAC processes exhibited different mechanisms during the multi-stage reaction and solid diffusion reaction, respectively and both can synthesize the desired products in 12 h. These two methods for MOFs preparation were characterized in detail using XRD, SEM and N 2 adsorption during the different growing stages. According to polar molecules (H 2 O and EtOH) steam-assisted in those synthesis, polar destruction molecules (H 2 O, NH 3 ) adsorption and stability of Cu-BTC and ZIF-8 was investigated.
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2017
·Vol. 58
·期 1
·103-111
·
IF 1.449
Bing Zhou,Zhubo Liu,Bin Xu,A.V. Rogachev,M.A. Yarmolenko,A.A. Rogachev
Polytetrafluoroethylene (PTFE) composite coatings doped with copper acetate and polyethylene (PE) were fabricated on rubber substrate by electron beam dispersion technique. The effects of dopant nature and glow discharge treatment on morphology, structural and tribological properties of the coatings were investigated. The results showed that Cu and PE doping change the surface structure of PTFE-based composite coatings due to the chemical reactions between the dispersion products. Cu-PE-PTFE coatings show the columnar and layered growth models without and with discharge treatment. Cu adding decreases the crystallinity, branched degree and unsaturated degree of PE coatings, but increases the branched degree and unsaturated bonds in the PE-PTFE coatings. Glow discharge enhances the crystallinity and ordering degree of composite coatings. Friction experiments indicated the significant difference of composite coatings in the nature of their destruction during friction. PE-PTFE coating is characterized of the brittle fracture with clear failure boundaries but Cu-PE-PTFE coating shows a rough surface without cracking and delaminating after friction. Cu doping increases the dynamic coefficient of friction of PE and PE-PTFE composite coatings, but discharge plasma decreases the dynamic coefficient of friction. Cu-PE-PTFE composite coating after discharge treatment has the decreased dynamic coefficient of friction and improved wear resistance. POLYM. ENG. SCI., 58:103–111, 2018. © 2017 Society of Plastics Engineers
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SEPARATION SCIENCE AND TECHNOLOGY
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2015
·
IF 1.171
Yuanyuan Xu,Jinming Sun,Hou Chen,Liangjiu Bai,Yating Wang,Lili Yu
Poly(n-butyl methacrylate-co-pentaerythritolriacrylate) (poly(n-BMA-co-PETA)) gel was first synthesized via reversible-deactivation radical polymerization (RDRP) technique with Cu(0)/N,N,N’,N’-tetramethylethylenediamine (TEMED) as catalyst system, 2-cyanoprop-2-yl-1-dithionaphthalate (CPDN) as chain transfer agent, and N,N-dimethylformamide (DMF) as solvent. The results exhibited well-controlled characters of the new RDRP technique. The poly(n-BMA-co-PETA) gel exhibited preferable three-dimensional network cross-linked structure. It possessed high oil absorption capacity and perfect reusability. The maximum oil absorption capacity was 52.6 g/g. The gel may have a number of potential applications in controlling oil pollution. The influence factors on oil absorbency were discussed in detail as well.
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高影响因子
ENVIRONMENTAL ENGINEERING SCIENCE
·
2015
·
IF 0.991
Jianming Liu,Chao Wang,Zhenhu Xiong
A magnetic multiwalled carbon nanotubes (MWCNTs) nanocomposite was synthesized and was used as an adsorbent for removal of furazolidone (FZD) and Cu(II) from aqueous solutions. Influence of parameters on the adsorption capacity, including initial pH, contact time, and temperature, were investigated. Langmuir and Freundlich adsorption models were used for the mathematical description of adsorption equilibrium. Experimental data were analyzed by pseudo first order, pseudo second, and intraparticle diffusion order kinetic models. Thermodynamic parameters such as ΔH0, ΔS0, and ΔG0 calculated from adsorption process revealed that the adsorption process was spontaneous, exothermic, and a physical process in the experimental temperature range. Cu(II) had a strong suppression effect on FZD binding in the simultaneous adsorption and FZD preloading experiment. As for Cu(II) simultaneous adsorption and preloading, the impact of FZD on Cu(II) desorption was almost negligible. The practical application of magnetic MWCNTs and regeneration of magnetic MWCNTs for several cycles using hydrochloric acid and N,N-dimethylformamide were also investigated. Results of the study showed that the carbon nanotubes have good regeneration property and can be used as potential adsorbent for FZD and Cu(II) in water/wastewater.
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高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Lining Fan,Huishun Shao,Wei Chen,Zhiwen Ding,Hui Zheng,Xiaoxiao Guo,Peng Zheng,Liang Zheng,Yang Zhang
Graphene/Cu composites have attracted significant research attention due to their exceptional electrical conductivity and ampacity. However, the growth of high-quality graphene on curved copper surfaces remains challenging due to the poor wettability between Cu and C. This study presents a novel approach for the in-situ growth of nitrogen-doped graphene/Cu composite wire utilizing copper wire surface oxidation and microwave plasma heating. Nitrogen defects and CuO nanoparticles enhance the Cu-C interface, promoting uniform graphene growth, efficient electron transfer and Joule heat dissipation. Consequently, the composite wire demonstrates a 10.4 % improvement in electrical conductivity and a 48.6 % increase in ampacity. The finite element simulation was employed to investigate the primary mechanisms underlying ampacity enhancement and thermal failure in nitrogen-doped graphene/Cu wire. This work offers a promising strategy for improving the graphene-Cu interface, paving the way for advanced composite wires with superior electrical properties.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Guiming Xie,Xingyang Bai,Yanrui Niu,Zhangjun Bai,Qingyuan Yang,Jian Liu,Zhou-jun Wang
ZIF-8 was employed as partial Zn source to prepare high-performance Cu/ZnO/Al 2 O 3 catalysts for methanol synthesis via carbon dioxide (CO 2 ) hydrogenation. Among the CuZnAl-x catalysts (x = 1, 0.75, 0.5, 0.25 and 0, denoting molar ratio of ZIF-8/(ZIF-8 + Zn(NO 3 ) 2 ·6H 2 O), the CuZnAl-0.5 catalyst possessed the highest space time yield of methanol ( STY MeOH ), which recorded 416.4 g MeOH kg cat −1 h −1 at 250 °C and 3.0 MPa. Using ZIF-8 as partial Zn source was found to increase the specific surface area, induce oxygen vacancies, intensify metal-oxide interactions and enrich medium basic sites, which may rationalize the excellent methanol synthesis activity of the CuZnAl-0.5 catalyst. Besides, the CuZnAl-0.5 catalyst showed good stability for 30 h of reaction. This work offers a unique route to fabricate catalysts with the aid of MOFs precursors and highlights the significance of oxygen vacancies in methanol synthesis catalysts.
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高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 5
·1-8
·
IF 5.705
Chen Wanlu,Yao Xun,Zhou Xinchun,Zhao Kang,Deng Anping,Li Jianguo
A flower-like Au/Cu alloy nanocomposite (Au/Cu NFs) was synthesized and used in an electrochemiluminescence (ECL) based method for sensitive determination of the dye Sudan I. The Au-g-C 3 N 4 nanosheets as an ECL emitter were prepared by electrostatic adsorption between gold nanoparticles and g-C 3 N 4 . They form a film on a glassy carbon electrode (GCE) and then can be connected with Sudan I antigen via gold-nitrogen bond and amidation reactions. The Au/Cu NFs combined with Sudan I antibody also via the Au-N bond and was introduced into the modified GCE by specific recognition between the antibody and the antigen. The overlap between emission spectra of the Au-g-C 3 N 4 nanosheets and absorption spectra of Au/Cu NFs enabled the appearance of ECL resonance energy transfer process. That is, when the Sudan I analyte not present, the ECL was weakened due to absorption by the gray Au/Cu NFs on applying voltages from −1.7 V to 0 V. Conversely, the Au/Cu NFs on the GCE are reduced due to the competition for the antibody between the analyte and the antigen. A strong green ECL emission was obtained. The ECL response is linear in the 0.5 pg mL −1 to 100 ng mL −1 Sudan I concentration range, and the detection limit is 0.17 pg mL −1 .
An Au/Cu alloy flower-like nanocomposite (Au/Cu NFs) is firstly synthesized as an acceptor to constitute an electrochemiluminescence-resonance energy transfer (ECL-RET) system for sensitive measurement of Sudan I, while Au nanoparticles (Au NPs) functionalized graphitic carbon nitride (g-C 3 N 4 ) acted as a donor.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shengyong Lu,Xuanhao Guo,Manting Chen,Guanjie Wang,Juan Qiu,Jiaming Ding,Minghui Tang,Zhengdong Han,Yaqi Peng,Jianhua Yan
The synergistic removal of multiple pollutants from flue gas has attracted growing interest in recent years. In this study, Cu-doped MnCeO x catalysts were synthesized via an impregnation method and integrated into PTFE fibers using a split-film process to enable the simultaneous removal of chlorobenzene (CB) and nitrogen oxide (NO). Among the catalysts tested, Mn 2 Ce 1 Cu 0.6 O x exhibited the highest performance, achieving 90 % CB degradation and 100 % NO conversion at 180 °C. The PTFE-based catalytic fibers also demonstrated excellent removal efficiency, reaching 83.7 % for dioxins at the same temperature. A possible reaction mechanism is proposed in which the NH 3 -SCR process facilitates CB oxidation by generating reactive intermediates. Cu doping was found to enhance the density of acid sites and promote the ring-opening of CB, thereby suppressing chlorine accumulation and improving catalyst stability. These findings provide valuable insights for the development and optimization of catalytic bag filters for the efficient, synergistic removal of multiple pollutants from industrial emissions.
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PubMed
高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Ying Hu,Mingjun Li,Xun Xu,Nan Ma,Jiahao Luo,Xiaoxuan Wu,Qixiang Ping,Xiao Lin,Tingbin Zhang,Chunyong Liang,Lei Yang
Prosthetic joint infection (PJI) remains a significant challenge in clinical applications. It not only impedes the recovery of bone tissue at the site of bone defect but also leads to multiple debridements, long-lasting antibiotic treatment and even secondary replacement. Titanium alloy Ti6Al4V (TC4) is widely used in orthopedic implants due to its excellent mechanical properties and biocompatibility; however, it lacks inherent antibacterial and osteoinductive functions. In this study, a composite coating based on polyvinyl alcohol (PVA) with tissue repair and antibacterial properties was applied on the surface of TC4. A PVA gel coating functionalized with terpyridine and catechol groups (PVA–TP–CA) was synthesized and subsequently complexed with copper (Cu) ions. The differential binding affinities of TP and CA groups to Cu enabled a sustained and controlled release of metal ions. Furthermore, a micro–nano surface structure was fabricated on TC4 using femtosecond laser technology to achieve a micro–nano structure interface and enhanced bonding strength. Biological evaluations demonstrated that the modified surface significantly improved the antibacterial, angiogenic, and osteogenic properties of TC4. These findings indicate that this multifunctional composite coating holds great promise for surface modification of orthopedic implants, offering an effective strategy for preventing PJI while promoting bone regeneration.
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Ling Li,Longcheng Zhang,Lichen Gou,Siqi Wei,Xiandeng Hou,Li Wu
Electrocatalytic methanol oxidation reaction (MOR) is a promising alternative approach to oxygen evolution reaction for efficient hydrogen production. However, developing highly efficient and cost-effective MOR catalysts, coupled with the cathodic hydrogen evolution reaction, is still a challenge. Herein, we used a Ni 2 P nanosheet array with Cu 2 O-Cu dendrites on nickel foam (Cu 2 O-Cu@Ni 2 P/NF) as an efficient and stable electrocatalyst for MOR, which attained a low potential of 1.41 V at 100 mA cm −2 and a small Tafel slope of 44.99 mV dec –1 with excellent stability for at least 24 h in 1.0 M KOH solution with 1.0 M methanol. In situ Raman spectroscopy reveals that Cu 2 O-Cu promotes the generation of the β-NiOOH active phase, and converts to Cu(II)O under the electrolysis conditions. Furthermore, the methanol electrolysis cell utilizing Cu 2 O-Cu@Ni 2 P/NF as both the cathode and anode delivered a current density of 10 mA cm −2 at a low cell voltage of 1.40 V, and the cell voltage decreased by 210 mV at a current density of 100 mA cm −2 compared to water electrolysis. This work provides a new strategy to design the promising Ni-based phosphide as a bifunctional electrocatalyst in methanol electrolysis, enabling energy-saving H 2 production.
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高影响因子
ENERGY & FUELS
·
2018
·
IF 3.024
Shaobo Liu,Bo Zhang,Zhanqi Bai,Feifan Chen,Fang Xie,Jinbing Zhou,Yongkang Lu,Guangwu Miao,Jiamin Jin,Zekai Zhang
Cu2O-SiO2 composite aerogel-like adsorbents with different n(Si/Cu) were synthesized by a sol–gel method, followed by drying under atmospheric pressure, and characterized by BET, XRD, SEM, H2-TPR, XRF, and FTIR means. Their adsorption performance for thiophene and benzothiophene in model fuels was investigated with equilibrium and breakthrough adsorption experiments, respectively. The results showed that Cu2O-SiO2 composite aerogel-like adsorbents exhibited an excellent desulfurization performance based on π-complexation between Cu(I) and thiophenics. The n(Si/Cu) of Cu2O-SiO2 had an obvious effect on their physical properties and consequently desulfurization performance. The BET surface area, pore size, and pore volume decreased with the decrease of n(Si/Cu) (increase of Cu content). Only a part of Cu was incorporated into the materials. The more the Cu(I) and the higher the specific surface area, the larger the adsorption capacity was. Cu2O-SiO2-50 performed the best, and breakthrough adsorption capacities for benzothiophene and thiophene were 5.78 mg S/gads (0.90 mmol-S/mmol-Cu) and 4.76 mg S/gads (0.74 mmol-S/mmol-Cu), respectively. The adsorption data can be well fitted by both the Langmuir and Freundlich adsorption isotherms. The effect of competitive adsorption of olefins or aromatics on the desulfurization performance of adsorbents was obviously weaker compared with the result in the literature. The spent Cu2O-SiO2 adsorbents can be well regenerated by benzene–n-heptane washing. The breakthrough adsorption capacity of thiophene on the first regenerated Cu2O-SiO2-50 was 71% of that on fresh adsorbent.
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高影响因子
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