JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Yanling Shi,Song Ye,Huazhen Liao,Junfang Liu,Deping Wang
Faujasite (FAU) type zeolite is built from sodalite cages that joined by oxygen bridges between the hexagonal faces, and is characteristic of high cation exchange capacity and thermal stability. In this research, the FAU-NaX zeolite with Na/Si/Al molar ratio of 4.08:1.4:1.0 was prepared with template-free hydrothermal method and then confirmed with XRD analysis , based on which a series of Ag + or/and Eu 3+ loaded zeolites were obtained through the ion-exchange procedure. The PL spectra measurement indicated that after heat treatment at optimized temperatures between 400-600 °C, the Ag + loaded zeolites showed strong green visible emission centered around 540–550 nm, which is due to the formation of Ag 3 n+ clusters. Furthermore, efficient energy transfer from silver-clusters to Eu 3+ can be achieved in the Ag + /Eu 3+ loaded zeolites, and the energy transfer efficiency that evaluated with silver-clusters lifetimes are 23.9%, 44.6%, 67.4% and 73.6%, respectively, in ZX-2Eu30Ag, ZX-5Eu30Ag, ZX-10Eu30Ag and ZX-20Eu30Ag. Besides, the XPS measurements implied that the loading of Eu 3+ resulted in a further reduction of silver-clusters, which can also promote the formation of silver-clusters without heat treatment. This new class of metal-clusters and rare earth (RE) ions co-actived phosphors may offer interesting perspective applications in optoelectronics and lighting.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Yunxiang Zhang,Yu Wang,Chenliang Zhou,Hazem Abdelsalam,Wei Chen,Li Huang,Zhichao Mu,Zhili Chen,Diab Khalafallah,Qinfang Zhang
High photogenerated carrier recombination rate and weak spectral response are the two main factors restricting photocatalytic activities of photocatalysts. In this work, a novel Ag/Bi 24 O 31 Cl 10 heterojunction has been developed by the in-situ photoreduction technique to address the preceding issues. Physicochemical properties of as-synthesized 0.7 wt% Ag/Bi 24 O 31 Cl 10 photocatalysts were investigated in detail. The Ag clusters can be seen as surface plasmon polaritons to light absorption capacity and photothermal effect, which was demonstrated via Raman and UV–Vis diffuse reflectance spectra (UV–Vis DRS). Density functional theory (DFT) calculations show that the additional unoccupied crystal orbital by the silver (Ag) will accelerate the charge separation where some of the excited electrons to the conduction band of Bi 24 O 31 Cl 1 0 will drift to these orbitals which in turn prevent charge recombination. Therefore, Ag metal cluster-decorated Bi 24 O 31 Cl 10 photocatalysts can be identified as electron trappers to boost the spatial separation of the photogenerated carrier, and finally, the CH 4 generation rate and the rhodamine b (RhB) degraded efficiency of Ag/Bi 24 O 31 Cl 10 photocatalysts are enhanced about 1.54 and 5.20 times, respectively. The Ag/Bi 24 O 31 Cl 10 composite photocatalyst retained high photocatalytic activities after four cycles indicating the stability and repeatability of the Ag/Bi 24 O 31 Cl 10 composite. This work aims to provide new insight into modifying ideal semiconductor materials for high photocatalytic activity.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Chem
·
2024
·
IF 19.1
Ying-Xue Yuan,Jia-Ni Zhang,Jun-Ru Wang,Kai Li,Shuang-Quan Zang
The construction of effective artificial chiral light-harvesting systems ( C -LHSs) is significantly important as it provides insights into the hierarchical levels of chirality evolution in natural systems. Herein, we devised pairs of chiral blue emitters, S -/ R -binaphthalene dioxygen- N -octadecamidephthalimide ( S -/ R -BPOA), which function as donors of chirality and light absorbers. S -/ R -BPOA co-assembled with enantiomers of atomically precise yellow-emitting subnanometer-scale Ag 6 clusters to fabricate C -LHSs. Within these hybrid C -LHSs, we successfully resolved enantioselective chirality/energy transfer that was dependent on the handedness of the components. This promoted the efficient circularly polarized energy transfer in chirality-compatible ensembles, resulting in a remarkable amplification of circularly polarized luminescence (CPL) in the ultrasmall silver cluster. The achieved dissymmetry factor ( g lum ) reached an impressive value of 1.54 × 10 −2 , and white-light CPL with chromaticity coordinates of (0.32, 0.33) was obtained. Furthermore, the customizable fluorescence and CPL in these C -LHSs bestow them with potential application possibilities in information storage and encryption.
研究领域:
材料科学
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光学
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化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
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IF 9.5
Yunxiang Zhang,Zhichao Mu,Chenliang Zhou,Hazem Abdelsalam,Xingmeng Zhou,Lin Shi,Zhili Chen,Yiran Liang,Zhongjie Wang,Qinfang Zhang
Bi-based Sillén–Aurivillius oxyhalides have attracted extensive attention from researchers owning to their wide range of light absorption, appropriate band structure, and excellent stability; however, their practical application is still limited by their rapid charge recombination. Herein, silver (Ag)-cluster-decorated novel Sillén–Aurivillius oxyhalides (bismuth iron titanium oxyhalide (Bi7Fe2Ti2O17Cl)) with abundant oxygen vacancies (OVs), were successfully synthesized to achieve efficient light absorption and interfacial charge separation. The optimal Ag/Bi7Fe2Ti2O17Cl composites showed excellent tetracycline hydrochloride (TCH) degradation and CO2 reduction efficiencies. The theoretical and experimental results demonstrate that the superior activity is primarily due to the increased magnetic moment of Bi7Fe2Ti2O17Cl induced by the interactions between Ag and O atoms, which strengthens the built-in electric field at the Schottky junction interface and promotes the transfer of photogenerated electrons from Ag clusters to oxyhalides, thus enhancing the generation of charge carriers in the semiconductor and inhibiting bulk recombination. Simultaneously, the synergistic effects of the thermodynamics and kinetics of photocatalytic CO2 reaction along with a lower Gibbs free energy are also responsible for the outstanding CO generation process. This work emphasizes the promising role of metal clusters as co-catalysts in the field of photocatalysis.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 18
·3215
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IF 5.719
Jianzhong Yu,Song Ye,Xinling Xv,Ling Pan,Peixuan Lin,Huazhen Liao,Deping Wang
In this research, the LiY zeolite was firstly synthesized by using NaY as the parent zeolite; thereafter, the LiYAg and NaYAg zeolites created for formaldehyde gas detection were prepared with further Ag+-Li+/Na+exchange and a mild thermal treatment at 300 °C to promote the formation of luminescent Ag CLs. The spectra experimental results indicated that Ag CLs showed stronger and blue-shifted emissions in LiYAg compared with in NaYAg, and the emission intensity of Ag CLs in both zeolites monotonously decreased when exposed to increasing formaldehyde gas content. Moreover, the linear dependence of the Ag CLs’ emission intensity variation on formaldehyde content indicated a reliable method for fast and sensitive formaldehyde detection. According to the XPS, UV–vis absorption, and N2adsorption–desorption isotherm studies, the formaldehyde-gas-induced luminescence quenching of Ag CLs is due to the formation of Ag2O and Ag NPs, in which the higher content of Ag+/Ag0redox couples in LiYAg and larger surface area of NaYAg benefit the precise detection of formaldehyde gas in low- and high-content ranges, respectively. Furthermore, the blue-shifted peak position and widened FWHM of Ag CLs can also be used for the indication of formaldehyde gas and the detection limit of NaYAg and LiYAg, which both meet with the standards of the WHO and OSHA.Keywords:FAUY zeolite;silver clusters;luminescence property;formaldehyde detection;auger parameter
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
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IF 4.3
Ling Pan,Song Ye,Ruihao Huang,Meiyan Wang,Tianning Zheng,Haoran Zhang,Deping Wang
Luminescent silver clusters that are confined inside porous zeolites have attracted great research interest due to the combined advantages of high quantum yield, tunable emission, excellent chemical stability, and desirable adoption ability of this micronano-composite. In this research, a series of Ag-exchanged R-LTA/Ag (R = Li, Na, K) zeolites were synthesized, in which the silver clusters showed blue-shifted excitation in the UV region, red-shifted emission in the visible region, and decreased emission intensity when taking Li+, Na+, and K+ as the extra-framework cations, respectively. The [Ag4(H2O)xR4-sod]6– (x = 2, 4; R = Li, Na, K) structures were constructed, and the TD-DFT method was further carried out to study the influence of extra-framework cations on the luminescence performance of [Ag4]2+ clusters, in which the substitution of Al for Si and the reasonable hydrate levels were both taken into consideration. It is estimated that the S1 and S3 levels for the [Ag4(H2O)4Li4-sod]6– cluster, the S4 level for the [Ag4(H2O)4Na4-sod]6– cluster, and the S5 level for the [Ag4(H2O)2K4-sod]6– cluster can be effectively populated through direct excitation, and the S1 → S0 transition is assumed to be responsible for the radiative emission in the visible region for the [Ag4]2+ pseudo-tetrahedrons. This calculated energy level diagram and simulated absorption spectra of [Ag4(H2O)xR4-sod]6– (x = 2, 4; R = Li, Na, K) clusters explained the modified luminescence property of silver clusters in R-LTA/Ag (R = Li, Na, K) zeolites studied in this research and reported literature.
研究领域:
材料科学
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光物理学
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理论化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Na Liu,Xiangyu Li,Jiakai Li,Yingze Cao,Lin Feng
The synthesis of high-performance materials for purifying oily wastewater, especially stable oil-in-water emulsions that aromatic pollutants present in water, is of growing scientific and technological significance. Novel hierarchical architectures of Ag clusters deposited biomimetic membrane have been synthesized by ingeniously selecting the mussel-inspired polydopamine coatings as an intermedium layer followed by a facile wet chemical reduction method. The target micro-scaled Ag clusters which are composed of innumerable nanoparticles, firmly load on the surface of sub-micrometer polydopamine spheres (PDSs) benefiting from the chelating capacity and benign reduction ability of PDSs. The resultant Ag@PDSs deposited membrane with enormous specific surface area exhibits superhydrophilicity and underwater superoleophobicity, making it highly promising for efficient separation of various surfactant-stabilized oil-in-water emulsions and synchronously excellent catalytic reduction of water-soluble aromatic dyes. Moreover, such a construction mode can effectively prevent the aggregation and possible leaching of Ag particles, which greatly contributes to the outstanding cyclic performance and good antibacterial activity. All these features demonstrate that the two-step strategy is a facile approach to design and exploit the deposited Ag@PDSs composites for diverse actual applications in oil/water emulsion separation, catalysis and antibacterial agent.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Research
·
2022
·
IF 11.036
Zhaoxian Qin,Zhiwen Li,Sachil Sharma,Yongwu Peng,Rongchao Jin,Gao Li
The development of new materials for the design of sensitive and responsive sensors has become a crucial research direction. Here, two silver cluster-based polymers (Ag-CBPs), including one-dimensional {[Ag22(L1)8(CF3CO2)14](CH3OH)2}n chain and two-dimensional {[Ag12(L2)2(CO2CF3)14(H2O)4(AgCO2CF3)4](HNEt3)2}n film, are designed and used to simulate the human nose, an elegant sensor to smells, to distinguish organic solvents. We study the relationship between the atomic structures of Ag-CBPs determined by x-ray diffraction and the electrical properties in the presence of organic solvents (e.g., methanol and ethanol). The ligands, cations, and the ligated solvent molecules not only play an important role in the self-assembly process of Ag-CBP materials but also determine their physiochemical properties such as the sensing functionality.
研究领域:
材料科学
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化学传感器
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结构化学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 13
·134004
·
IF 3.551
Xiaoyu Wang,Jinjin Guo,Qian Zhang,Shuxian Zhu,Lu Liu,Xiaofeng Jiang,Da-Hua Wei,Ru-Shi Liu,Lidong Li
Pathogenic bacterial infection, especially in the wound, may threaten human health. Developing new antibacterial materials for wound healing is still urgent. Metal nanoclusters have been explored as a novel antibacterial agent. Herein, biomolecule gelatin was chosen as a substrate and functionalized with gold/silver clusters for bacterial killing. Through a simple amidation reaction, gold/silver clusters were successfully conjugated in a gelatin substrate to obtain a Au/Ag@gelatin sponge. The presence of gold/silver clusters modified the porous structure of the gelatin. Thus, the water absorption and water retention of the Au/Ag@gelatin sponge were enhanced. More importantly, the gold/silver clusters show aggregation-enhanced emission and strong reactive oxygen generation, that endow the Au/Ag@gelatin sponge with a good antibacterial property. The good physical performance and favorable bactericidal activity of the Au/Ag@gelatin sponge suggest its potential for application as a wound dressing.
研究领域:
生物材料学
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医学
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纳米生物学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Kuan-Guan Liu,Xue-Wen Wei,Fahime Bigdeli,Xue-Mei Gao,Jing-Zhe Li,Xiao-Wei Yan,Mao-Lin Hu,Ali Morsali
Advancement of the synthesis and control of the self-assembly process of new high-nucleus silver clusters with desired structures is important for both the material sciences and the many applications. Herein, three new silver clusters, 20-, 22-, and 8-nucleus, based on alkynyl ligands were constructed and their structures were confirmed by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analyses, and Fourier-transform infrared spectroscopy (FT-IR). For the first time, the trivalent tetrahedron anion of AsO43–, as a template, and the surface ligand of Ph2PO2H, with new coordination modes, were employed in preparation of the silver clusters. The role of surface ligands and template anions in the size and structure of the clusters was investigated. The presence of the template in the structure of the clusters led to the formation of the high-nucleus clusters. Also, in this report, it was shown that the participation of the template in the assembly of a cluster can be controlled by the surface ligands. UV–vis absorption and luminescent properties of the clusters and the thermal stability of the 8-nucleus cluster were also studied.
研究领域:
材料科学
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化学合成
·
配位化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 37
·16486-16493
·
IF 4.197
Aixiang Tian,Yali Ning,Yang Yang,Xue Hou,Jun Ying,Guocheng Liu,Juwen Zhang,Xiuli Wang
By using mixed rigid and flexible organic ligands, three Keggin based compounds, [Ag6(tbz)4(bmz)2(H3PW12O40)]·4H2O (1), [Ag(H2bdpm)2(H2PMo12O40)]·7.5H2O (2), and [Ag4(tbz)2(H2bdpm)2(HPMo12O40)]·2H2O (3) (Htbz = thiabendazole, Hbmz = benzimidazole, H2bdpm = 1,1′-bis(3,5-dimethyl-1H-pyrazolate)methane), were hydrothermally synthesized and structurally characterized. Through adopting rigid Htbz ligands, compound 1 with hexa-nuclear AgI clusters has been obtained. These hexa-nuclear clusters are linked by Keggin anions alternately to form a one dimensional (1D) chain. In compound 2, the organic moiety is the flexible H2bdpm ligand. The Keggin anions are fused by [Ag(H2bdpm)2]+ subunits to form a 1D chain. In compound 3, the rigid Htbz and the flexible H2bdpm cooperate to modify the anions. Two tbz and two H2bdpm are fused by four AgI ions to construct a tetra-nuclear AgI cycle. The anions connect these cycles through Ag–O bonds alternately to form a 1D chain. Adjacent chains arrange parallel to build a 2D layer. The chains in the adjacent layers are vertically packed and linked by Ag–O bonds to construct a 3D framework. The electrochemical and photocatalytic properties of the title compounds have been studied. Furthermore, we have also studied the Hg2+ recognition properties in a suspension of compounds 1 and 3.
研究领域:
无机化学
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材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Matter
·
2024
·
IF 17.3
Huizhen Ma,Ling Liu,Hua He,Si Sun,Shuyu Yang,You Huang,Yuan Li,Kexin Tan,Haile Liu,Shuhu Liu,Yonghui Li,Changlong Liu,Pengfei Liu,Hao Wang,Xiao-Dong Zhang
Ligand-protected metal clusters are essential in optics, catalysis, and biomedicine due to their unique electronic transfers and rapid renal clearance, but their stability and photostability are still highly challenged. Here, we develop atomically precise Ag 29 clusters with 900–1,200 nm emissions that exhibit ultrahigh structural stability for 2 months and distinct photostability for 140 min via Pt single-atom engineering. The density functional theory shows that Ag 29 behaves as a molecular-like semiconductor with a direct band gap of 1.3 eV. Meanwhile, the Pt single atom introduces rich 5 d states in the highest occupied molecular orbital, leading to a continuous electron supply that ensures high photostability. We acquire numerous images of blood vessels, which enables machine learning to predict high-resolution near-infrared II (NIR-II) images. The NIR-II light sheet microscopy achieves a large field of view and deep-tissue imaging without photobleaching and accurately surveils the pathological progression of intestinal injury at the depth of 2.4 μm.
研究领域:
生物医学工程
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材料科学
·
光学成像
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）