JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 18
·9092-9099
·
IF 5.968
Shiguo Chen,Yujuan Guo,Shaojun Chen,Huimin Yu,Zaochuan Ge,Xuan Zhang,Peixin Zhang,Jiaoning Tang
Due to the outbreaks of infectious diseases caused by different pathogenic bacteria and development of antibiotic resistance, researchers are actively searching for new antibacterial agents. Synergistic antibacterial effects provide a new way to prepare antibacterial systems to fight resistant bacteria. In this study, novel copper (Cu)/titanium dioxide (TiO2)/chitosan (CS) (CTC) three-component nanoparticles were facilely prepared via photocatalytic reduction on the basis of the synergistic antibacterial principle. The structure, antibacterial activity and antibacterial mechanism of CTC were investigated systematically. The results showed that this hybrid material exhibits excellent antibacterial ability against Escherichia coli and Staphylococcus aureus due to the synergistic antibacterial effect of the Cu, TiO2 and CS components in the nanoparticles. The minimal inhibition concentrations (MIC) of CTC against E. coli and S. aureus are only 5.22 μg mL−1 and 2.61 μg mL−1, respectively, much lower than the two-component systems. Thus, the encouraging results presented in this study demonstrate great potential applications of CTC as an alternative candidate for an antibacterial agent with high antibacterial activity.
研究领域:
纳米技术
·
抗菌材料
·
材料科学
·
光催化
·
生物医学工程
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DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 49
·34524-34533
·
IF 3.9
Suo Zhao,Qiao Wang,Jin Liu,Xianglong Hao,Xiao Liu,Wenfei Shen,Zhonglin Du,Yao Wang,Mikhail Artemyev,Jianguo Tang
In this study, ZnS capped Cu–In–S (ZCIS) quantum dots doped with Mn ions are synthesized by a thermal injection method, with luminescence covering almost the entire visible area. The large Stokes shift effectively inhibits the self-absorption effect under luminescence, and the quantum yield of ZCIS quantum dots increased from 38% to 50% after ZnS capping and further to 69% after doping with Mn. First, red-, yellow-, and blue-emitting quantum dots were synthesized and then, polychromatic ensembles were obtained by mixing the trichromatic quantum dots in a different ratio. Using the home-built inkjet printer, multilayered and multicolor mixed patterns were obtained for information pattern storage and multilayer pattern recognition and reading.
研究领域:
纳米材料
·
量子点
·
光学材料
·
信息存储技术
·
光子学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL ENGINEERING SCIENCE
·
2016
·
IF 1.481
Qiang Li,Juhong Zhan,Bo Chen,Xiangqi Meng,Xuejun Pan
Long-root Eichhornia crassipes (L.R.E. crassipes), as a new kind of macrophyte, was used in Dianchi Lake in recent years, but its comparison in eliminating metals with traditional Eichhornia crassipes was never conducted. In this article, a comparative study on the removal of toxic metals from aqueous solutions by L.R.E. crassipes and E. crassipes was first studied. In total, the removal percentage of toxic metals followed the order of Pb>Cd>Cu>Zn, and L.R.E. crassipes was better than that with E. crassipes. Meanwhile, L.R.E. crassipes had a higher relative growth rate than E. crassipes, and solutions had a better physicochemical property after dealing with L.R.E. crassipes. Results also showed that maximum removal capacity for Zn, Cu, and Cd with L.R.E. crassipes was reached at pH 5. An orthogonal of L16 (44) in the multimetal system was designed to study the effects of cometals on removal of a single metal. Metal removal from the solution involves two stages: adsorption and absorption. Removal mainly occurred in the roots, and the main removal process was adsorption. Adsorption percentages of Pb, Zn, Cu, and Cd were 75%, 43%, 29%, and 61% in the root surface, respectively. Bioconcentration factors of Pb, Zn, Cu, and Cd were 267, 102, 230, and 173 with L.R.E. crassipes, respectively. Based on these results, L.R.E. crassipes could be used as a biodegradable absorbent to purify polluted water bodies fast and effectively.
研究领域:
环境科学
·
植物修复
·
水生植物学
·
污染控制
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DOI
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 18
·3960-3966
·
IF 5.686
Peng Ren,Qinglin Li,Tao Song,Zhaozhan Wang,Ken Motokura,Yong Yang
In this study, we report a highly stable and efficient single-atom Cu dispersed on N-doped porous carbon as a superior catalyst for azide-alkyne cycloaddition reaction. A broad set of 1,4-disubstituted 1,2,3-triazoles was synthesized in high to excellent yields with good tolerance of various functional groups in a cost-effective, environment-friendly manner. Parallel studies show that the single-atom Cu with unique coordination structure exhibits superior catalytic activity to the metallic Cu nanoparticles analogue. Remarkably, the single-atom Cu catalyst demonstrates robust stability and can be reused several times without variations in activity and regioselectivity. Graphical Single-atom catalysis : A single-atom Cu dispersed on N-doped carbon exhibits superior catalytic activity for efficient and selective AAC reaction to access a broad set of 1,4-disubstituted 1,2,3-triazoles in a facile and environmentally-benign manner. Single-atom Cu catalyst demonstrates both higher reactivity and stronger stability than the supported Cu nanoparticles under the same reaction conditions.
研究领域:
催化化学
·
材料化学
·
有机合成
·
纳米技术
·
绿色化学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2013
·Vol. 68
·期 6
·1251-1257
·
IF 1.102
Yan Qishe,Zhang Luyun,Jiang Meiling,Zhang Ruiqin,Sun Hongwen
The sorption of chloramphenicol on four types of sediment and the effect of coexistence Cu(II) on the sorption were studied. Sorption isotherms and thermodynamic analysis were employed to dispose the experimental sorption data. Experimental results showed that organic matter was the dominant parameter and the coexistence of heavy metal Cu(II) could promote the sorption of chloramphenicol on four tested sediments. The adsorption parameter analysis showed sorption of chloramphenicol on the sediment was not pure distributional effects, not a strong interaction between molecule and surface, but other weak interactions. Thermodynamic parameters values such as Δ G , Δ H and Δ S were all below zero, which indicated that the sorption was a spontaneous and exothermal process.
研究领域:
环境科学
·
环境化学
·
土壤与沉积物污染
·
污染物吸附
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 5
·2746-2751
·
IF 1.491
Xie Dewen,Xu Jingtao,Liu Zhu,Liu Guoqiang,Shao Hezhu,Tan Xiaojian,Jiang Haochuan,Jiang Jun
Bi 2 Te 3 thermoelectric materials have been developed for refrigeration around room temperature. But the ZT values decrease quickly above 400 K, which need to be improved for applications in power generation. In the present work, P -type Cu/BiSbTe alloys have been prepared via a zone melting method followed by spark plasma sintering. Due to the effects of Cu powders, the as-prepared materials exhibit a shift of the peak Seebeck coefficient value towards higher temperature and suppressed lattice thermal conductivity with increasing Cu powders. A peak ZT value as high as 0.87 has been obtained around 500 K in the BiSbTe alloy with 1 wt.% Cu powder addition, and the ZT values stabilize above 0.8 from 375 K to 550 K. This high and stable value for BiSbTe alloys at such a high temperature is very attractive for its application in power generation devices.
研究领域:
材料科学
·
热电学
·
能量转换
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 9.8
Yunling Shao,Miao Wang,Jianpeng Zhang,Yongxin She,Zhen Cao,Guohua Zhang,Fen Jin,Jing Wang,A.M. Abd El-Aty
In this study, we constructed a peptide‑copper (peptide-Cu) mimetic enzyme for thiram detection. The enzyme mimics peroxidase-like activity (POD), which allows it to catalyze the oxidation of o -phenylenediamine (OPD) substrates in the presence of hydrogen peroxide (H₂O₂). Thiram can prevent the catalytic activity of peptide-Cu mimetic enzymes by surface blocking, inhibiting chromogenic substrate oxidation and facilitating the rapid detection of thiram. The inhibitory mechanism was elucidated through molecular dynamics (MD) simulations and density functional theory (DFT) calculations, revealing that thiram synergistically reduces the catalytic activity of the peptide-Cu mimetic enzyme by disrupting its structural stability and electronic properties. Thiram exhibited good linearity in the concentration range from 0.01 to 5 μg/mL, with a lowest limit of detection (LOD) of 0.048 μg/mL, and showed a good recovery range from 79.71% to 108.13% in real samples. This approach, based on peptide-metal complexes, offers a straightforward and affordable method for pesticide monitoring.
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产品关联
DOI
PubMed
高影响因子
Micromachines
·
2018
·Vol. 9
·期 12
·678
·
IF 2.222
Pinhua Zhang,Haoming Sun,Wenhui Guan,Jinjin Liang,Xiaomeng Zhu,Junkai Zhang,Min Chen,Meng Cao,Wenbing Qian,Kefu Gao,Guangliang Cui
The nanostructures with uniform long-range ordered structure are of crucial importance for performance standardization of high-quality surface-enhanced Raman scattering (SERS) spectra. In this paper, we described the fabrication and SERS properties of Au decorated Cu (Au@Cu) nanoarrays. The Cu nanoarrays with uniform long-range ordered structure were first synthesized by in-situ electrochemistry assembly on insulated substrate. The Cu nanoarrays can reach a size of centimeters with strictly periodic nano-microstructure, which is beneficial for the production and performance standardization of SERS substrates. Then Au nanoparticals were decorated on the Cu nanoarrays by galvanic reaction without any capping agent. The obtained Au@Cu nanoarrays exhibit excellent SERS activity for 4-Mercaptopyridine, and the sensitivity limit is as low as 10−8M. Therefore, this facile route provides a useful platform for the fabrication of SERS substrates based on nano ordered arrays.
研究领域:
纳米材料
·
表面科学
·
分析化学
·
等离激元学
·
传感器
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2011
·
IF 2.141
Qiang Chen,Dun-qiang Tan,Rui Liu,Wen-xian Li
Electrodepositing Al coatings on W 90 Cu 10 foils in AlCl 3 + LiAlH 4 Tetrahydrofuran–benzene electrolyte was reported in this work. Effects of variations in molar ratios of AlCl 3 /LiAlH 4 , current density and plating time on surface morphology and crystal orientations were studied, and the optimal values of three parameters were preliminarily gained. Results showed that Al coatings displayed dense and cone-shaped micro-crystallites, and the particle size of coatings increased obviously with increasing current density or decreasing the proportion of AlCl 3 . It was indicated that all of the electrodeposits exhibited a strong preferred (111), (220) crystal orientation, and the (220) crystal orientation became strong along with electroplating time and current density, but weak with the proportion of AlCl 3 in baths. On the contrary, the changes of the (111) orientation exhibited an opposite trend.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
DOI
高影响因子
Science China-Physics Mechanics & Astronomy
·
2018
·Vol. 61
·期 9
·1-4
·
IF 2.754
Zhang Yue,Liu Wenhao,Si Jin,Zhu Xiyu,He Chengping,Zhao Haonan,Wen Hai-Hu
Superconductivity is observed in a new nontoxic cuprate system Ga-Ba-Ca-Cu-O, with T c = 82 K for GaBa 2 Ca 5 Cu 6 O 14 + δ ( 5 (Ga-1256) and T c = 116 K probably for GaBa 2 Ca 3 Cu 4 O 10+δ (Ga-1234) or GaBa 2 Ca 2 Cu 3 O 8+δ (Ga-1223), respectively. All compounds are fabricated by solid state reaction method under high pressure and high temperature. Samples are characterized by resistivity, magnetization and X-ray diffraction (XRD) measurements. The temperature dependence of magnetization measured in both zero-field-cooled and field-cooled processes on one sample (S1) shows two superconducting transitions at about 82 K and 113 K. The estimated shielding fraction for the phase with T c of 82 K is about 67%, while the fraction for another phase with T c of 113 K is quite small. The XRD Rietveld refinement for S1 indicates two main phases existing in the sample, Ga-1256 with fraction of about 58% and non-superconducting Ca 0.85 CuO 2 with fraction of about 42% respectively. Thus, we can conclude the superconducting phase with transition temperature of 82 K is due to Ga-1256. The resistivity measurement also confirms the superconductivity for S1, and the resistivity reaches zero at about 82 K. The temperature dependence of magnetization for another sample (S2) shows much higher superconducting shielding fraction for the phase with T c of 116 K, which may be a promising prospective for the synthesis of Ga-1234 or Ga-1223 phase.
研究领域:
凝聚态物理
·
超导物理
·
材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Jihong Liang,Yifan Zheng,Zongjian Liu
Cu electrodes are prepared by thermal annealing of Cu nanowires under Ar atmosphere at 600–800 °C for 30 min. Investigation of as-prepared electrodes by both X-ray diffractometry and scanning electron microscopy indicates that after annealing a rise in the size of Cu nanowires occurs due to the melting of some small-sized Cu nanowires. When the annealing temperature is not too high (e.g. 600 °C), the melting of small-sized nanowires may create many tightly-connected junctions among big-sized nanowires, leading to the formation of a stable, porous nanowire network. The measurements of both electrochemical active surface areas and electrocatalytic activity of these Cu electrodes demonstrate that their active surface areas decrease with increasing the annealing temperature and the electrode prepared at 600 °C shows the highest activity for reduction of nitrate in acidic medium. Examination of the electrode prepared at 600 °C as nitrate sensor via differential pulse voltammetry reveals that this sensor exhibits excellent performance: a linear response ranging from 8 to 5860 μM (R 2 = 0.999), a sensitivity of 1.375 μA/μM, and a detection limit of 1.35 μM at a signal-to-noise ratio of 3. Compared with the Cu-based sensors reported in the literature, this nanowire-based sensor not only possesses the broadest linear range but also has a very low detection limit. Its stability, anti-interference ability, and application to nitrate detection in real samples are also investigated.
研究领域:
分析化学
·
环境监测
·
电化学传感
·
材料科学
·
水处理
·
生物医学工程
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2018
·
IF 3.886
Yunfeng Bao,Chunlei Huang,Limin Chen,Yu dong Zhang,Long Liang,Jinjun Wen,Mingli Fu,Junliang Wu,Daiqi Ye
Anatase TiO 2 nanosheets (-ns-) with dominant exposed {001} facets were used as support to load copper, and the synthesized Cu/TiO 2 -ns catalysts were evaluated for CO 2 hydrogenation to methanol. Under the reaction conditions, P = 3.0 MPa, T = 260 °C, V (N 2 ): V (H 2 ): V (CO 2 ) = 8:69:23 and gas hourly space velocity (GHSV) = 3600 mL g −1 h −1 , the methanol yield reached an appealing high value, 5.6%. Copper-loading amount, calcination temperature and reduction atmosphere have been investigated in this work, which significantly influence the particle sizes of copper and/or the defect concentration in TiO 2 , then leading to different catalytic performance. Characterizations of XRD, EPR, CO 2 -TPD and FTIR demonstrate that higher specific surface area of Cu is good for the hydrogenation of CO 2 and adequate amount of Ti 3+ plays important roles in CO 2 activation. Both of them facilitate high turnover frequency (TOF) of methanol formation.
研究领域:
催化化学
·
能源化学
·
材料科学
·
环境科学
·
工业催化
·
表面科学
·
纳米材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）