ACS Applied Nano Materials
·
2024
·
IF 5.3
Qiuping Yang,Haixia Kong,Liwei Tang,Yanyun Ma,Feng Liu,Maochang Liu,Yi Wang,Pu Zhang,Yiqun Zheng
Metal nanoparticles have been found to exhibit a broad spectrum of antibacterial activities, yet not all metals possess the captivating plasmonic properties necessary for effective interaction with incident light. In this study, we demonstrate the feasibility of synergistically enhancing the Cu-induced antibacterial activity through the incorporation of plasmonic photothermal therapy by hybridlike anchoring the Cu component on a gold (Au) nanoplate that can effectively absorb near-infrared light. To fabricate the Janus structure, plate-like Au seeds were mixed with copper(ii) nitrate, cetyltrimethylammonium bromide, ascorbic acid, and hexamethylenetetramine, resulting in the formation of Au–Cu Janus nanostructures (JNSs). Notably, the plasmonic absorption of Au was preserved without being hindered by the Cu coating. Photothermal measurements revealed that the temperature rise of Au–Cu JNSs aqueous suspensions could reach up to 28.3 °C in just 10 min when exposed to 1064 nm laser light at a power density of 1 W·cm–2, with a photothermal conversion efficiency of 42.14%. Additionally, they show broad-spectrum antibacterial properties, making them potential contenders for addressing a wide range of bacterial infections. Our findings demonstrate that the antibacterial performance of metal nanoparticles composed of less plasmon-active components but with exceptional antibacterial properties can be significantly enhanced by coupling them with a plasmon-active nano-antenna through a Janus architecture. The Au–Cu JNSs possess potential application prospects in photothermal therapy, broad-spectrum antibacterial treatments, biomedical imaging, targeted drug delivery, sensitive diagnostics, and the development of advanced materials.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2017
·
IF 2.446
Yijun Zhang,Yu Jin,Meiling He,Lei Zhou,Tao Xu,Rongrong Yuan,Sai Lin,Weidong Xiang,Xiaojuan Liang
Bimetallic gold-copper and gold-copper solid solutions nanocrystals (NCs) with orthorhombic morphologies were successfully embedded in sodium borosilicate glass; these materials were fabricated via a facile and synthetic sol-gel technique. Microstructural investigations demonstrate that the Au-Cu intermetallic nanostructure is generated in the glass host. Z-scan technique was applied to reveal the third-order nonlinear optical properties of the as-obtained glasses at the wavelength of 800 nm. The as-synthesized glasses exhibit similar nonlinear behaviors with reverse saturation absorption effects and self-focusing performances. The third-order nonlinear susceptibility χ (3) values were optimized by tuning the sizes of the Au-Cu NCs. The χ (3) of Au-Cu(1), Au-Cu(2) and Au-Cu(3) measured to be 3.1 × 10 −12 , 5.4 × 10 −12 , and 4.4 × 10 −12 esu for the single-pulse energy of 1 μJ. We have discussed the nonlinear optical mechanism of Au-Cu sodium borosilicate glass that may be due to the quantum confinement effects and surface plasmon resonance effects.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Panting Zheng,Pengfei Zhao,Jijun Ding,Haixia Chen,Yongfeng Qu
Flexible pressure sensors have wide range of applications in fields such as electronic skin, medical detection and wearable devices. In this paper, a flexible piezoresistive pressure sensor based on Cu mesh/ZnO nanorod/graphene pressure-active layer is designed. Cu mesh is used as the conductive substrate, which not only enhances sensor performance but also expands the detection range of the sensor with its interlaced grid structure. To enhance the stability of the sensor, the graphene-functionalized polyvinylidene fluoride (PVDF) film is inserted between this active layer and the bottom electrodes, which prevents the direct contact between the Cu mesh and the electrodes, increases the electron transport channel and enhances the responsiveness of the sensor. The sensor shows sensitivity of 0.4 kPa -1 over pressure range of 0-0.5 kPa, as well as response time of 413 ms. Based on the excellent characteristics, a 4×4 pressure sensor array is constructed for the application of pressure sensors in daily life and human activity detection, which enables high-resolution detection and provides a reliable idea for the design of flexible sensors in the future.
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高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yinlu Fan,Yuxin Li,Jiu Shi,Yanwei Sun
A hierarchical Cu-gallate-based mesh membrane was synthesized on macroporous copper mesh substrate via mesoporous copper hydroxide transition layer. The resulting hierarchical pore structure and enhanced hydrophilicity enabled exceptional water flux alongside high separation efficiency for oil-water mixtures. These results significantly surpassed the performance limits of current state-of-the-art MOF membranes. Our findings highlight the promise of this hierarchical membrane for the efficient treatment of industrial oily wastewater.
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高影响因子
Nanomaterials
·
2025
·Vol. 16
·期 1
·
IF 4.3
Ying Xie,Qitong Sun,Yuanyuan Li,Wanwan Li,Zhiwei Hou,Lihui Wei,Sujun Guan
We report a galvanic replacement-driven strategy for the in situ growth of highly uniform one-dimensional (1D) Cu@CuO-X (X = Ag, Bi) nanobelts directly on aluminum foils. Unlike conventional multi-step coating or hard-template replication strategies, the formation of these heterostructured nanobelts is governed by a spontaneous interfacial galvanic replacement process between Cu and the introduced metal species, ensuring in situ growth and intimate interfacial integration. Comprehensive SEM, TEM, XRD, and XPS characterizations confirm the successful formation of Cu@CuO-Ag and Cu@CuO-Bi architectures, where Bi predominantly exists in the oxidized Bi3+state, forming Bi2O3-like surface species. Benefiting from their 1D anisotropic framework and controllable heterointerfaces, this work underscores the distinctiveness and versatility of the self-templated galvanic replacement strategy for the design of multifunctional nanomaterials.
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PubMed
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-10
·
IF 14.919
Yu Jiafeng,Sun Xingtao,Tong Xin,Zhang Jixin,Li Jie,Li Shiyan,Liu Yuefeng,Tsubaki Noritatsu,Abe Takayuki,Sun Jian
The rational design of high-temperature endurable Cu-based catalysts is a long-sought goal since they are suffering from significant sintering. Establishing a barrier on the metal surface by the classical strong metal-support interaction (SMSI) is supposed to be an efficient way for immobilizing nanoparticles. However, Cu particles were regarded as impossible to form classical SMSI before irreversible sintering. Herein, we fabricate the SMSI between sputtering reconstructed Cu and flame-made LaTiO 2 support at a mild reduction temperature, exhibiting an ultra-stable performance for more than 500 h at 600 °C. The sintering of Cu nanoparticles is effectively suppressed even at as high as 800 °C. The critical factors to success are reconstructing the electronic structure of Cu atoms in parallel with enhancing the support reducibility, which makes them adjustable by sputtering power or decorated supports. This strategy will extremely broaden the applications of Cu-based catalysts at more severe conditions and shed light on establishing SMSI on other metals.
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高影响因子
Materials Reports: Energy
·
2022
·
IF 0
Zhanyou Xu,Yi Xie,Ying Wang
Electrochemical CO 2 reduction reaction (CO 2 RR) exhibits remarkable potential in producing valuable chemicals with renewable energy. Operating CO 2 RR in acidic media is beneficial to solve the issue of low carbon utilization brought by (bi)carbonate formation at the cathode. Suppressing the competing hydrogen evolution reaction and achieving stable CO 2 RR performance remains challenging. Herein, we constructed a 3-dimensional Cu (3D-Cu) gas diffusion electrode (GDE) to achieve efficient C 2 H 4 production with a partial current density ( j C2H4 ) of over 470 mA cm −2 and a Faradaic efficiency (FE C2H4 ) of 40%. With pause electrolysis, the decay rate of the j C2H4 is only half that of the traditional constant electrolysis. The GDE after constant electrolysis was found to suffer from severe salt formation, leading to the decreased activity and poor stability.
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CRYSTENGCOMM
·
2019
·Vol. 22
·期 4
·678-685
·
IF 3.382
Xiao Shao,Tianyong Zhang,Bin Li,Yue Wu,Xiaoyuan Ma,Jingchao Wang,Shuang Jiang
Copper sulfide (Cu2−xS) is a kind of cation deficient transition metal sulfide, which has attracted great interest due to its unique properties that arise from degenerate vacancy-doping, particularly its tunable localized surface plasmon resonance (LSPR) properties. In this work, a range of vacancy-doped Cu2−xS nanocrystals (NCs) (Cu1.2S, Cu1.4S, Cu1.75S, and Cu1.94S NCs) with a size of around 10 nm was prepared with tunable LSPR through a hot injection method. The doping level was manipulated effectively by varying the injection volume of sulfur powder–oleic acid (S–OA) to finely tune the LSPR wavelength. Cu2−xS NCs with four different doping levels were investigated as photocatalysts for degradation of dyes. The Cu1.94S NCs with the highest LSPR energy exhibited the best photocatalytic activity due to the highest free carrier density, presumably influenced by Cu vacancies and the volume of the S–OA solution. Theoretical calculations of the free carrier density of Cu2−xS NCs are consistent with the order of the photocatalytic activity. The results demonstrate that the correlation of the photocatalytic activity with the corresponding concentration of free holes and the LSPR wavelength is of interest, which will provide inspiration for the design of non-noble metal catalysts by regulating the free hole concentration in degenerate p-doped Cu2−xS caused by cation vacancies.
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高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Jian Zhang,Yazhe Zhang,Jieqiong Zhao,Zhe An,Yanru Zhu,Xin Shu,Hongyan Song,Xu Xiang,Xiaodan Ma,Jing He
Oxidative carbonylation has attracted broad interest from both academia and industry in recent years. Oxycarbonylation of ethanol to diethyl carbonate (DEC) has been of great challenge due to the difficulty in the simultaneous activation of ethanol and CO. This work reports a heterogeneous Cu-Pd pair catalysis for simultaneous activation of ethanol and CO, affording a selectivity of 85.4% to DEC and a space–time yield (STY) of up to 207 mg∙g −1 ∙h −1 . Well distributed Cu-Pd pair affords more Cu (I) sites, promoting CO activation and the followed insertion to adsorbed ethanol. Further increasing ratio of Cu (I) species via the pre-treatment of catalyst with CO and ethanol promotes simultaneously the activation of ethanol and CO, affording a STY of 325 mg∙g −1 ∙h −1 of DEC.
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高影响因子
Nanomaterials
·
2021
·Vol. 12
·期 1
·127
·
IF 5.076
Qining Wang,Quanwang Yan,Yu Zhao,Jie Ren,Ning Ai
Cu-Mg-Al layered double hydroxides (LDHs) with amine modification were prepared by an organic combination of an anionic surfactant-mediated method and an ultrasonic spalling method usingN-aminoethyl-γ-aminopropyltrimethoxysilane as a grafting agent. The materials were characterized by elemental analysis, XRD, SEM, FTIR, TGA, and XPS. The effects of the Cu2+content on the surface morphology and the CO2adsorption of Cu-Mg-Al LDHs were investigated, and the kinetics of the CO2adsorption and the photocatalytic reduction of CO2were further analyzed. The results indicated that the amine-modified method and appropriate Cu2+contents can improve the surface morphology, the increase amine loading and the free-amino functional groups of the materials, which were beneficial to CO2capture and adsorption. The CO2adsorption capacity of Cu-Mg-Al N was 1.82 mmol·g−1at 30 °C and a 0.1 MPa pure CO2atmosphere. The kinetic model confirmed that CO2adsorption was governed by both the physical and chemical adsorption, which could be enhanced with the increase of the Cu2+content. The chemical adsorption was suppressed, when the Cu2+content was too high. Cu-Mg-Al N can photocatalytically reduce CO2to methanol with Cu2+as an active site, which can significantly improve the CO2adsorption and photocatalytic conversion.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
M.Z. Chu,C. Zhang,X.H. Liang,C.H. Hu,G.T. Ma,R.Y. Fang,Chengying Tang
The Au-Cu nanoalloys (NPs) were produced by NaBH 4 co-reduction from the mixture precursor solution of component Au and Cu, under the protection of sodium citrate stabilizer . The Au-Cu NPs encapsulated in SiO 2 , Au 5 Cu 5 @SiO 2 NPs, were then synthesized by the Stöber method based on the obtained Au-Cu NPs. The microstructure and particle sizes were characterized by TEM observation. The phase transition temperature of Au-Cu@SiO 2 was determined by DSC measurement. The surface tension, surface segregation and surface energy of Au-Cu NPs as a function of particle size and temperature were calculated by the theoretical model based on the thermodynamic properties of pure component of Au and Cu NPs, respectively. The thermodynamic parameters of Au-Cu system at various nanoscales were optimized on the basis of experimental and theoretical results in this work and previous results in literature. Based on the obtained the thermodynamic data set, the nano phase diagrams of the Au-Cu system at nanoscale were calculated, and the thermodynamic properties of Au-Cu nanometer system were obtained. The results show that the calculated results agree well with experimental work.
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高影响因子
Results in Chemistry
·
2025
·
IF 4.2
JianGuo Huang,Rashid Khan,Chunhui Zhai,Xianting Ding,Li-Sha Zhang,Jin-Ming Wu,Zhizhen Ye
The development of efficient disinfection techniques that can persistently eradicate viruses or disrupt their transmission is of paramount significance for curbing the spread of pandemics. Existing disinfection techniques commonly suffer from secondary pollution and difficulty in achieving continuous disinfection while ensuring safety and effectiveness, particularly in crowded environments. In this study, we adopted ozone synergistic catalytic oxidation (OSCO) technology for the highly efficient disinfection of bacteria and viruses. The OSCO route is based on the catalytic decomposition of ozone into active radicals in the presence of an optimized rod-like Cu/MnO 2 catalyst. The high catalytic activity of the Cu-doped MnO 2 catalyst can be attributed to the presence of numerous oxygen vacancies, which facilitate the catalytic decomposition of ozone into active radicals. This method serves multiple purposes, including the eradication of bacteria and viruses as well as the prompt decomposition of ozone to prevent any potential leakage. A disinfection rate of 99.9 % for both Staphylococcus albicans and H1N1 viruses was achieved within 20 min. The catalyst also demonstrated exceptional efficiency in degrading residual ozone, achieving a high removal rate of 99.99 % within 25 min, thus assuring safe disinfection. Density functional theory (DFT) calculations further supported that Cu doping induced lattice defects in MnO 2 , promoting the formation of interfacial oxygen vacancies and in turn favoring the catalytic oxidation process. The current OSCO technology offers a highly efficient and secure disinfection method with a wide range of potential applications in various fields.
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