JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Shutao Gao,Tao Feng,Cheng Feng,Ningzhao Shang,Chun Wang
In this paper, a novel visible-light responsive photocatalyst of Ag/AgCl@MIL-101 was synthesized via vapor diffusion-photoreduction strategy. The as-prepared composite material was characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, ultraviolet–visible diffuse reflection spectra and X-ray photoelectron spectroscopy. Due to the synergistic effect between Ag/AgCl and MIL-101, the composite photocatalyst exhibited an enhanced and stable photoactivity for the degradation of Rhodamine B under visible light irradiation. The relationship between the photocatalytic activity and the structure of Ag/AgCl@MIL-101 hybrid material was discussed and the possible reaction mechanism was proposed.
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2015
·
IF 3.615
Wenrong Cao,Lifang Chen,Zhiwen Qi
Novel Ag/Ag 2 SO 4 /ZnO nanostructures were successfully fabricated by a facile microwave-assisted template-free hydrothermal method. The results reveal that Ag/Ag 2 SO 4 nanoparticles are uniformly dispersed on the surfaces of ZnO plates, which forms the hierarchical Ag/Ag 2 SO 4 /ZnO (AZ) nanostructures. The AZ-2 photocatalyst obtained by adjusting the amounts of thiourea and AgNO 3 with the molar ratio of 1:1 exhibits the highest photocatalytic efficiency, and rhodamine B can be decolorized within 35 min and 20 min under visible-light ( λ > 420 nm) and natural sunlight irradiation, respectively. The enhanced photocatalytic performance of AZ catalysts may result from the synergistic effects of Ag/Ag 2 SO 4 nanoparticles loaded on ZnO surfaces, which can enhance visible-light absorption capability of ZnO and promote photoinduced electron–hole separation. Therefore, the Ag/Ag 2 SO 4 nanoparticles doped on semiconductors can be used as effective visible-light photocatalysts and show a great potential for practical applications in the treatment of dye-containing wastewater.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xiang Ran,Ye Du,Zhenzhen Wang,Huan Wang,Fang Pu,Jinsong Ren,Xiaogang Qu
Developing methods of decreasing the harm to cell and increasing the antibacterial efficiency is becoming a potential topic of medical treatments. We demonstrated a hyaluronidase-triggered photothermal platform for killing bacteria based on silver nanoparticles (AgNPs) and graphene oxide (GO). The property of the hyaluronidase (HAase)-triggered release provided excellent antibacterial activity against Staphylococcus aureus. Upon illumination of NIR light, the GO-based nanomaterials locally raised the temperature, resulting in high mortality of bacteria. The HAase-triggered AgNPs releasing approach for antibacterial allows AgNPs to be protected by hyaluronic acid (HA) template without affecting mammalian cells. The nanocomposites provided antibacterial activity against S. aureus while showing low toxicity to mammal cells. In addition, the GO–HA–AgNPs are prepared for in vivo experiments and show excellent antibacterial property in wound disinfection model.
✓ 已验证
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2014
·Vol. 30
·期 9
·1667-1673
·
IF 0.886
XUE Qing-Rui,LI Jian-Ling,XU Guo-Feng,HOU Peng-Fei,YAN Gang,DAI Yu,WANG Xin-Dong,GAO Fei
A lithium-rich solid-solution layered cathode material, Li[Li0.2Mn0.54Ni0.13Co0.13]O2, was synthesized using a fast co-precipitation method, and surface modified withAg/C via chemical deposition. The electrochemical properties,
structures, and morphologies of the prepared samples were investigated using X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), galvanostatic charge-discharge cycling, cyclic voltammetry (CV), electrochemical impedance
spectra (EIS), and energy dispersive X-ray spectroscopy (EDS). The XRD results showed that the pristine and Ag/Ccoated cathode materials both have hexagonal α-NaFeO2 layered structures with the R3m
space group. Microscopic morphological observations and EDS elemental mapping showed that a uniform Ag/C coating layer of thickness 25 nm was deposited on the surfaces of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 particles. The Ag/C-coated Li[Li0.2Mn0.54Ni0.13Co0.13]O2
material gave an excellent electrochemical performance. The initial discharge capacity (0.05C) of the Ag/C- coated sample was 272.4 mAh ·g-1, with an initial coulombic efficiency of 77.4%, corresponding to 242.6 mAh·g-1 for the pristine sample, with an initial
coulombic efficiency of 67.6%, in the potential range 2.0-4.8 V (vs Li/Li+). After 30 cycles (0.2C), the Ag/C-coated Li[Li0.2Mn0.54Ni0.13Co0.13]O2 retained a capacity of 222.6 mAh·g-1, which was 14.45%
higher than that of Li[Li0.2Mn0.54Ni0.13Co0.13]O2. We also found that the Ag/C coating improved the rate capability of the solid-solution material Li[Li0.2Mn0.54Ni0.13Co0.13]O2. The
capacity retention (1C) of the Ag/C-coated sample was 81.3%, compared with the capacity at 0.05C. CV and EIS results showed that the Ag/C coating layer suppressed the oxygen release in the initial charge progress and lowered the surface film resistance and electrochemical reaction resistance
of the pristine sample.
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2022
·
IF 6.044
Peibo Li,Jianian Hu,Tao Fang,Youlin Zhu,Yi Sun,Xiao Wang,Xuebin Yang,Qiang Shen,Guoqiang Luo
The objective of this study is to modulate the size of intermetallic compounds to increase the strength of Al–Ag composites. In this study, we prepared Al–Ag composites using plasma-activated sintering (PAS). The effect of the applied current on the nucleation barrier of the Al/Ag alloy phase was investigated. The strengthening mechanism of Ag-reinforced Al matrix composites was explored. We found that two alloy phases, Ag 2 Al and Ag 3 Al, were generated in the Al–Ag composites. The alloy phases distributed at the grain boundaries strengthened the Al–Ag composites by enhancing the dislocation density in the matrix and by impeding dislocation motion . The ultimate tensile strength and yield strength of the Al–7Ag composite increased by 60.1% and 166%, respectively, compared with those of pure Al. Moreover, we calculated the contribution of each strengthening mechanism to the overall yield strength. The applied current lowered the nucleation barrier of the alloy phase and facilitated the nucleation process.
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 3
·426
·
IF 4.324
Chen Hou,Dongyan Zhao,Wenqiang Chen,Hao Li,Sufeng Zhang,Chen Liang
In this work, magnetic CuFe2O4/Ag nanoparticles activated by porous covalent organic frameworks (COF) was fabricated to evaluate the heterogenous reduction of 4-nitrophenol (4-NP). The core-shell CuFe2O4/Ag@COF was successfully prepared by polydopamine reduction of silver ions on CuFe2O4nanoparticles, followed by COF layer condensation. By integrating the intrinsic characteristics of the magnetic CuFe2O4/Ag core and COF layer, the obtained nanocomposite exhibited features of high specific surface area (464.21 m2g−1), ordered mesoporous structure, strong environment stability, as well as fast magnetic response. Accordingly, the CuFe2O4/Ag@COF catalyst showed good affinity towards 4-NP via π-π stacking interactions and possessed enhanced catalytic activity compared with CuFe2O4/Ag and CuFe2O4@COF. The pseudo-first-order rate constant of CuFe2O4/Ag@COF (0.77 min−1) is 3 and 5 times higher than CuFe2O4/Ag and CuFe2O4@COF, respectively. The characteristics of bi-catalytic CuFe2O4/Ag and the porous COF shell of CuFe2O4/Ag@COF made a contribution to improve the activity of 4-NP reduction. The present work demonstrated a facile strategy to fabricate COF-activated nano-catalysts with enhanced performance in the fields of nitrophenolic wastewater treatment.Keywords:magnetic covalent organic frameworks;nanocomposite;core-shell;p-nitrophenol;reduction
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ping Zhang,Qing Sui,Zhiqiang Liu,Chengyv Hu,Chunjing Li,Xiaodan Guo,Jinhui Wang,Guofa Cai
The stretchable electrochromic modulator is one of the most promising energy-saving optoelectronic devices that can be integrated into smart portable and wearable electronics. A lot of focus has been on developing transparent conductive electrodes of stretchable electrochromic modulators, but they generally suffer from poor chemical stability, low photoelectric balance, and unsatisfactory deformability. To address this challenge, we first develop Ag@Au nanowires (NWs) micromesh-based stretchable transparent conductive electrodes (STCEs) using a self-assembled approach, which displays superior photoelectric performance (8.5 Ω sq -1 with a transmittance of 81.5 %), good chemical stability in harsh electrolyte environment (acidic and alkaline) as well as robust mechanical stability (bending, folding, stretching and twisting). As a demonstration, the grown WO 3 on Ag@Au NWs-based STCEs can deliver good electrochromic stability even after bending over 1000 cycles and stretching to 50 %. Moreover, highly soft Zn//WO 3 and polyaniline (PANI)//WO 3 electrochromic modulators were assembled using flexible Ag@Au micromesh STCEs, which still retain uniform electrochromism in neutral and acidic electrolytes respectively. Definitionally, the strategy of in-situ grown Au shell on the surface of AgNWs micromesh provides an innovative solution to fabricate high-performance STCEs for the related portable smart wearable electronic devices.
✓ 已验证
DOI
高影响因子
Chemosensors
·
2024
·Vol. 12
·期 8
·166
·
IF 3.7
Xiangfang Lin,Qinhui Dong,Yalin Chang,Shusheng Zhang,Pengfei Shi
Luminescent Ag nanoclusters (Ag NCs) are a promising probe material for sensing and bioimaging applications. However, the intrinsic obstacle of poor water stability and photostability greatly restrict their practical application in biological systems. Herein, we report the intracellular hypochlorite (ClO−) detection with amphiphilic copolymer-modified luminescent Ag NCs with good biocompatibility and photostability. The Ag NCs were synthesized by using chemically inert hydrophobic ligands and then modified with an amphiphilic (1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(poly(ethylene glycol))-2000]) (DSPE-PEG-2000) and sodium dodecyl sulfonate (SDS) for phase transfer. It was found that the approach of the removal of organic solvents during the phase transfer has remarkable influences on the properties of the Ag NCs, including their size, luminescence property, and aqueous stability. Furthermore, the silver core of Ag NCs could be oxidatively damaged by ClO−, thereby causing photoluminescence (PL) quenching. The ClO−-induced PL quenching was specific over the other common reactive oxygen species (ROS) as well as some common interferences. Finally, they have been successfully applied as a fluorescent nanoprobe for detecting exogenous and endogenous ClO−in living cells.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Khak Ho Lim,Yuxuan Xia,Lixiang Xu,Mingjun Zhao,Mingquan Li,Ye Cheng,Jiale Mao,Shuang Wang,Lei Chen,Sai Wing Tsang,Pingwei Liu,Qingyue Wang,Xuan Yang,Wen-Jun Wang,Andreu Cabot,Min Hong,Yu Zhang,Yu Liu
Ag 2 Se has emerged as a promising thermoelectric (TE) material for room-temperature applications. However, its TE performance is limited by the low carrier effective mass ( m* ) of only 0.1 m 0 , where m 0 represents the free electron mass. In this study, we employ a microwave-assisted method to synthesize nanostructured Ag 2-x Se with Pb doping that is found to increase m* to 0.4 m 0 . Accordingly, the Seebeck coefficient is significantly enhanced, which together with the high electrical conductivity, leads to enhanced electronic transport. The increase in m* is systematically investigated by density functional theory calculations and linked to the enhanced electronic by modeling simulations. The calculated band structures reveal that the hybridization of heavy Pb-6p orbitals flattens the conduction band edges, and thereby enhances m* . Furthermore, Pb doping significantly reduces the lattice thermal conductivity due to the high-density point defects, dislocations, and grain boundaries, as revealed by detailed electron microscopy characterizations. The synergy from both enhanced electronic transport and reduced phonon propagation yielded a maximum figure of merit of 1.04 at 376 K, and an average figure of merit of 1.0 for Pb-doped Ag 1.9 Se. The optimized TE performance is further validated in a flexible TE generator, which produced a maximum output power of 0.6 μW at a temperature difference of 45 K. These findings demonstrate that enhancing m* and increasing phonon-scattering using vacancy tuning and aliovalent doping effectively boosts the TE performance of Ag 2 Se, a strategy that can be extended to other TE materials to maximize their potentials for power generation and thermoelectric cooling applications.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Na Xiao,Jiang Xue Dong,Shi Gang Liu,Na Li,Yu Zhu Fan,Yan Jun Ju,Nian Bing Li,Hong Qun Luo
Selective and sensitive detection of multiple metal ions is significant for biological researches and environmental monitoring, because the abnormal metal ions levels have potential damage to the human body and environment. In this study, a fluorescent sensing platform based on Ag nanoclusters has been established for independent detection of Hg 2+ , Cu 2+ , and Fe 3+ ions in a solution. The interference of the fluorescence induced by coexistent metal ions was removed by altering buffers with different pH and using different masking agents. Moreover, the detection mechanism is discussed in detail, which provides a valuable reference for the detection of heavy metal ions with metal nanomaterials. This sensor exhibits a high selectivity and sensitivity, and the linear ranges for Hg 2+ , Cu 2+ , and Fe 3+ detection are 0.05-9, 0.05-18, and 0.1–18 μM with the corresponding detection limits of 12, 27, and 50 nM, respectively. Furthermore, this method was successfully used for analyzing the three metal ions in environmental and biological samples.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yan Wang,Shengzhe Zhao,Yi Yang,Raul D. Rodriguez,Anya Lipovka,Yun Lu,Honglan Huang,Jinju Chen
Ag nanoparticle-decorated Bi 2 O 3 -TiO 2 heterogeneous photocatalysts were successfully obtained by combining facile sacrificial templates and photoreduction . The as-synthesized Ag@Bi 2 O 3 -TiO 2 photocatalysts with a narrow band gap of 2.40 eV exhibited considerable photocatalytic activity to degrade rhodamine B (RhB) and tetracycline hydrochloride (TCH), and the removal efficiency reached 100% and 92%, respectively. Ag@Bi 2 O 3 -TiO 2 photocatalysts also exhibited stable recyclability for the degradation of RhB and TCH. Trapping experiments helped determine the major reactive oxidative species for TCH photodegradation . The desirable photodegradation performance is mainly attributed to improved light absorption , enhanced charge separation, and strong redox capacity of Ag@Bi 2 O 3 -TiO 2 nanostructures with S-scheme heterojunction . This work provides a facile avenue to construct heterogeneous tubular nanostructures with intensive photoabsorbance and effective photocatalysis to degrade organic contaminants.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2013
·
IF 2.112
Yongqian Lei,Guanhua Wang,Pengran Guo,Huacan Song
A series of Ag-loaded photocatalysts of Ag–BiOBr x I 1− x have been synthesized by a solution method and characterized by variety methods. The degradation of rhodamine B (RhB) showed that these samples exhibited excellent and composition-dependent performance in the visible light region. The Ag–BiOBr 0.75 I 0.25 composite photocatalyst shows the highest photocatalytic activity in the degradation of RhB and 4-CP pollution. The load of metal Ag has remarkably improved the photocatalytic activity. The significant enhancement in the Ag–BiOXs photoactivity could be both the effect of Ag deposits as electron traps and the surface plasma resonance absorption effect of Ag. A possible mechanism of enhanced activity of Ag–BiOXs was proposed based on the analysis of the band gap structure.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）