Journal of Physical Chemistry C
·
2022
·
IF 4.177
Yun Ling,Ya-ru Chu,Feng Gao,Qing-yun Feng,Hui-qi Xie,Yong Shao,Qing-xiang Wang
The unique chemical and physical properties of metal–organic frameworks (MOFs) endow them with promising applications in the electrochemical sensing field. Herein, a novel label-free electrochemical sensing strategy for cardiac troponin I (cTnI) has been constructed on the basis of immunoaffinity-induced depression of the electrochemical signal of Cu-MOF-74. The electrochemical assay shows that the immunoaffinity reaction between cTnI and anti-cTnI on the electrode surface can effectively inhibit the electrochemical signal of electrode-confined Cu-MOF-74, suggesting that the Cu-MOF-74-based interface may find application in the label-free analysis of cTnI. Thus, Cu-MOF-74 acts as a bifunctional material in this strategy, namely, the immobilization matrix of probe molecules and the signal source of the sensing analysis. In addition, the reason for the electrochemical signal depression of Cu-MOF-74 induced by immunoaffinity reaction is attributed to the increase in the insulation layer and the blocking of the electrolyte diffusion from the bulk solution to the electrode surface. In this strategy, the analytical range of cTnI is from 0.01 pg mL–1 to 1.0 ng mL–1 and the detection limit is 4.5 fg mL–1. The Cu-MOF-74-based sensing interface is also reliable for cTnI analysis in real serum samples, showing that the biosensor has promising application in point-of-care testing (POCT) of myocardial injury-related diseases.
✓ 已验证
产品关联
DOI
高影响因子
Water
·
2022
·Vol. 14
·期 7
·1007
·
IF 3.53
Xudong Cheng,Xiaoping Zhang,Shaoqi Zhou,Lin Shi
For the treatment of 2-naphthol wastewater, the homogeneous electro-Fenton process was considered as an effective method but some disadvantages greatly restrict its application. The three-dimensional electro-Fenton (3D-EF) system using a nano zero-valent iron-supported biochar (NZVIs-BC) particle electrode and a Cu-supported stainless steel electrode (Cu-SSE) was proposed to avoid the disadvantages of the homogeneous electro-Fenton. In this work, the 3D-EF system was developed, which consisted of a Cu-SSE (cathode), a graphite rod (anode) and a NZVIs-BC particle electrode. The effect of the ratio of ferrous sulfate heptahydrate (FS) to rice straw (RS), CuSO4•5H2O amount, initial pH of 2-naphthol wastewater and current intensity (the output current of the power supply) on the removal rate of 2-naphthol were investigated. It is noteworthy that more than 98.36% of the 2-naphthol in aqueous solution was removed by the 3D-EF system, and only about 60.09% of 2-naphthol was removed by the homogeneous electro-Fenton system. Furthermore, naphthalene, benzoic acid, β-naphthoquinone, 1, 2-naphthalenedione, phenol and aromatic hydrocarbon were the main degradation products of 2-naphthol by the 3D-EF system; the toxicity of 2-naphthol wastewater was also greatly reduced.Keywords:electro-Fenton;Cu-supported stainless steel electrode;nano zero-valent iron-supported biochar;2-naphthol wastewater
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
·
2022
·
IF 11.446
Xiangchen Kong,Chao Liu,Xing Wang,Yuyang Fan,Weicong Xu,Rui Xiao
Practical, economical, and high-selectivity methods of lignin bio-oil upgrading could greatly increase biorefinery productivity and profitability. Herein, we report the efficient production of oxygen-containing fuel via supercritical methanol hydrodeoxygenation (SCM-HDO) of lignin bio-oil with a well-defined Cu/CuZnAlO x catalyst. The fuel range cyclic alcohols were majorly produced from guaiacol and corncob lignin pyrolysis bio-oil with selectivity of 66.67 and 15.90% at 300 °C in 8 h, respectively, via Cu species induced hydrogenation of aromatics rings and inhibited over-deoxygenation of alcoholic hydroxyl groups. The catalyst activity decreased by 28% after five runs of bio-oil HDO due to the oxidation of Cu species and carbon deposit, where the oxidation of Cu species played the dominant role as the carbon deposit was restrained to as low as 3.64 wt% with the mild catalyst acidity. Meanwhile, the catalyst activity could be easily recovered through a calcination-reduction process to remove the carbon deposit and reactivate the Cu species. The results offered appealing opportunities for tailoring more efficient approaches for the upgrading of lignin bio-oil to alternative biofuels.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 4
·919-927
·
IF 2.726
Zhu Junlun,Cui Qian,Wen Wei,Zhang Xiuhua,Wang Shengfu
Although great progress has been made in the advancement of nanozymes, most of the studies focus on mimicking peroxidase, oxidase, and catalase, while relatively few studies are used to mimic laccase. However, the use of nanomaterials to mimic laccase activity will have great potential in environmental and industrial catalysis. Herein, Cu/CuO-graphene foam with laccase-like activity was designed for the identification of phenolic compounds and the detection of epinephrine. In a typical experiment, the formation mechanism of Cu/CuO-graphene foam was investigated during the pyrolysis process by thermogravimetric-mass spectrometry. As a laccase mimic, Cu/CuO-graphene foam exhibited excellent catalytic activity with a Michaelis-Menten constant and a maximum initial velocity of 0.17 mmol/L and 0.012 µmol·L −1 ·s −1 , respectively. Based on this principle, Cu/CuO-graphene foam nanozyme could differentially catalyze phenolic compounds and 4-aminoantipyrine for simultaneous identification of phenolic compounds. Furthermore, a colorimetric sensing platform was fabricated for the quantitative determination of epinephrine, showing linear responses to epinephrine in the range of 3 µg/mL to 20 µg/mL with the detection limit of 0.2 µg/mL. The proposed Cu/CuO-graphene foam nanozyme could be applied for the identification of phenolic compounds and the detection of epinephrine, showing great potential applications for environmental monitoring, biomedical sensing, and food detection fields.
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2022
·
IF 5.76
Axin Liang,Shanshan Tang,Miao Liu,Yue Yi,Bingteng Xie,Huipeng Hou,Aiqin Luo
Human IgG is one of the most important immunoglobulins in the human body. The present study described the fabrication of four kinds of layer-by-layer structures of copper metal-organic frameworks (Cu-MOFs) on the working electrode by electrodeposition, which were then applied as an electrochemical sensor for the sensitive determination of IgG in serum. First, MOFs synthesized using different deposition potentials are expected to have varied morphology and properties. Herein, four copper MOFs (Cu-MOFs) were electrosynthesized by a simple and direct reduction approach. The as-synthesized Cu-MOFs exhibit varied morphology and electrocatalytic behavior. Then, IgG was employed as a template in the electropolymerization of pyrrole-imprinted films on the surface of glassy carbon electrodes. Finally, the template protein was removed to form a molecularly imprinted film with the capability to qualitatively and quantitatively signaling of IgG. Under optimized conditions, the sensor for IgG exhibits a wide detection range of 0.01–10 ng mL −1 with a limit of detection (LOD) of 3 pg mL −1 (S/N = 3). Besides, other parameters including the selectivity, reproducibility (RSD 3.6%), and recovery rate (95.2–102.0%) are all satisfactory. The practicability of the sensor was verified by detecting IgG in human serum samples, which indicated that the sensor was suitable for potential clinical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2022
·Vol. 12
·期 5
·534
·
IF 4.501
Zhaohui Teng,Shan Huang,Na Li,Qulan Zhou
Rice husk ash (RHA) has potential as a supporter of catalysts. In this research, we studied the activity and SO2tolerance of RHA-based Fe-Cu oxide in the reduction of NO by CO. Characterization methods were employed to study the properties of the catalysts and their SO2tolerance. Activity and SO2resistance were also tested at different temperatures. We recommend two catalysts with SO2resistance ability: Fe0.67Cu0.33/RHA (the highest catalytic activity) and Fe0.8Cu0.2/RHA. The NO removal rate hardly changed with the addition of SO2and was kept at about 100%. However, the CO conversion rate decreased with increasing SO2at the lower reaction temperatures, which may be due to the formation of sulfites. Fortunately, the deactivation was reversible and can be reduced with an increase in the reaction temperature. The results of our research may help promote the application of CO-SCR.Keywords:rice husk ash;Fe-Cu catalysts;NO reduction;SO2resistance;CO-SCR
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Qing Wang,Jiaxin Liu,Zhenyu Lei,Yun Mou,Mingxiang Chen
In this work, we combined the computational simulation and experiments to explore the convection on filling characteristics of the micro through-holes (THs) with multiple aspect ratio (ARs). The micro THs with ARs 6.25:1∼1.67:1 (thickness 500 μm) were chosen as research targets. The computational model was established based on the actual state of Haring-Cell, and attention was fixed on the convection distribution in the micro THs. The interaction mechanism of additives with the changing ARs systematically explored by electrochemical measurements. The simulation results show that the convection in the micro THs center declines with the increasing AR. The convection-dependent additives formed diverse adsorption states around the micro THs with different ARs, providing two kinds of Cu filling processes, including defect-free filling and insufficient filling. The weak convection is conducive to the adsorption of the accelerator and detrimental to the adsorption of the suppressor, which accelerates the Cu electrodeposition and elevates the throwing power (TP) value to over 100% to form the defect-free filling. Strong convection is instrumental in the adsorption of the leveler so that a uniform Cu film thickness can be obtained but to create the insufficient filling. Simulation and electroplating experiments show that the AR of 3.33:1 is the cut-off point of the flow field distribution and the electroplating processes. The micro THs with AR higher than 3.33:1 can be fully filled with a uniform bright Cu surface.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Ayesha Idrees,Ali Shan,Waqas Qamar Zaman,Ali Mohsin,Zain Abbas,Tanvir Shahzad,Atif Shakeel,Shuguang Lyu
M-metal (Ca and Cu) doped Ca-Fe 2 O 3 and Cu-Fe 2 O 3 catalysts were synthesized using solvothermal method. The Ca-Fe 2 O 3 and Cu-Fe 2 O 3 catalysts were characterized by XRD, Raman spectroscopy , SEM , TEM and XPS spectroscopy. The catalytic performance of 6%Ca-Fe 2 O 3 and 5%Cu-Fe 2 O 3 catalysts for trichloroethylene (TCE) removal were improved by M-metal doping leading to TCE removal at 99.8% in 1 h, which were three folds greater than by simple a- Fe 2 O 3 in the presence of persulfate (PS). Ca and Cu doping formed defective structure and created more oxygen vacancies thereby generating abundant active species during PS activation process. Further, the influence of catalysts’ dosage, oxidant dosage, solution pH, inorganic anions, and dissolved oxygen were evaluated. Complete removal of TCE was also obtained at weak alkaline pH condition. The greater specific surface area and the improved electrical conductivity was attributed to the huge generation of O 2 •– and 1 O 2 species which played major part in TCE removal. Scavenging tests and ESR spectroscopy confirmed the dominant role of O 2 •– and 1 O 2 in TCE degradation. The stability and viability of 6%Ca-Fe 2 O 3 and 5%Cu-Fe 2 O 3 catalysts were evaluated by repetition tests and in the presence of surfactants, TCE removal in real water matrix, and in the degradation of multi-pollutants.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Jun-xia Yu,Hong-xia Li,Ru-yi Zhou,Xiao-di Li,Han-jun Wu,Chun-qiao Xiao,Ru-An Chi
Electroplating sludge containing heavy metal of copper is not only a toxic and harmful solid waste, but also a valuable resource that could be recycled. In this study, a novel Cu (II) ion imprinted bagasse was prepared and used as a sorbent to selectively recycle copper from the leaching solution of electroplating sludge. The adsorption performances of the imprinted bagasse for Cu (II) were studied and compared with that of the non-imprinted bagasse. Results showed that the adsorption capacity of the imprinted bagasse was 32.0 mg g -1 , which was higher than that of the non-imprinted bagasse (22.9 mg g -1 ). Adsorption of Cu (II) on the imprinted bagasse could be finished within 70 min and the high adsorption amount could be achieved in a wide pH range from 4.0 to 7.0. Regeneration experiment verified that the imprinted bagasse could be used repeatedly without obvious ability loss. Competitive adsorption results showed that the imprinted bagasse had much higher adsorption capacity and selectivity toward Cu (II) than the non-imprinted bagasse. Due to the spatial and complex effect, the imprinted bagasse showed stronger adsorption affinity toward Cu (II) than the co-ions of Ca (II), Zn (II), Mg (II), Cd (II), and Pb (II), and thus could selectively adsorb Cu (II) from the complex leaching solution of electroplating sludge. Therefore, the imprinted biosorbent had excellent application prospect in recycling metal ions from the electroplating sludge.
✓ 已验证
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 7
·2103724
·
IF 17.521
Xingwen Cheng,Zhi Xie,Wei Zheng,Renfu Li,Zhonghua Deng,Datao Tu,Xiaoying Shang,Jin Xu,Zhongliang Gong,Xingjun Li,Xueyuan Chen
Fundamental understanding of the effect of doping on the optical properties of 3D double perovskites (DPs) especially the dynamics of self-trapped excitons (STEs) is of vital importance for their optoelectronic applications. Herein, a unique strategy via Cu + doping to achieve efficient STE emission in the alloyed lead-free Cs 2 (Ag/Na)InCl 6 DPs is reported. A small amount (1.0 mol%) of Cu + doping results in boosted STE emission in the crystals, with photoluminescence (PL) quantum yield increasing from 19.0% to 62.6% and excitation band shifting from 310 to 365 nm. Temperature-dependent PL and femtosecond transient absorption spectroscopies reveal that the remarkable PL enhancement originates from the increased radiative recombination rate and density of STEs, as a result of symmetry breakdown of the STE wavefunction at the octahedral Ag + site. These findings provide deep insights into the STE dynamics in Cu + -doped Cs 2 (Ag/Na)InCl 6 , thereby laying a foundation for the future design of new lead-free DPs with efficient STE emission.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yulong Bian,Bin Liu,Shuang Liang,Binbin Ding,Yajie Zhao,Fan Jiang,Ziyong Cheng,Abdulaziz A. Al Kheraif,Ping'an Ma,Jun Lin
Nowadays, the therapeutic efficiency of tumor can be significantly influenced by the limitation of endogenous tumor microenvironment (TME). An ideal solution for improving therapeutic efficiency is constructing TME-responsive and multifunctional nanoreactor. Herein, a TME-responsive nanoreactor has been constructed using novel dendritic mesoporous silica nanoparticles (DMSNs) as the cornerstone, followed by anchoring platinum-(IV) prodrugs, loading photosensitizer indocyanine green (ICG), and decorating Cu 2+ carboxylate MOFs. The prepared nanoreactor provides a high loading efficiency for Pt prodrugs and ICG, while the externally decorated MOFs can prevent premature leakage in neutral physiological environment at the same time. However, after accumulation at the tumor site, the outer MOFs can be rapidly decomposed in the TME to release Cu 2+ , which achieves efficient chemodynamic therapy (CDT) through Cu 2+ -triggered Fenton-like reaction and GSH depletion ability. At the same time, the released Pt drugs can achieve efficient chemotherapy. Moreover, the near-infrared (NIR) can activate the photodynamic and photothermal therapy (PDT&PTT) ability of ICG, resulting in PTT-enhanced CDT. Meanwhile, the nanoreactor can exhibit photothermal and magnetic resonance imaging (MRI) ability for highly specific diagnosis of tumor. Overall, this study provides a paradigm of TME-responsive nanoreactor for collaboratively multimodal enhanced tumor therapy.
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 3
·914
·
IF 3.748
Jintao Wang,Xinjie Wang,Lin Zhang,Luobin Zhang,Fangcheng Duan,Fengyi Wang,Weiwei Zhang,Jianqiang Wang,Zheng Zhang,Chunjin Hang,Hongtao Chen
A 3–5 μm Cu@Sn core-shell powder was prepared by chemical plating. Based on the mixture of this Cu@Sn and Ag NPs (nanoparticles), a soldering material for third-generation semiconductors was prepared. The joints prepared with this soldering material had a shear strength of over 40 MPa at 25 °C. This joint did not fail after more than 600 thermal cycles from −40 °C to 140 °C. The special feature of this joint is that the energy potential difference between nanoparticles and micron particles generated in the surface force field during reflow promoted the surface pre-melting of the particles by releasing the excess energy. By this mechanism, it was possible to reduce the porosity of the sintered layer. At the same time, due to the high surface activity energy of nano-silver, the diffusion of the Sn atoms was promoted, further enhancing the bond strength.Keywords:TLP;Cu@Sn;integrated packaging;soldering
✓ 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）