Journal of Materials Research and Technology-JMR&T
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2023
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IF 6.4
Jianwei Gao,Xiaoqing Si,Hanyue Ding,Xiaoyang Wang,Mushi Zheng,Chun Li,Junlei Qi,Jian Cao
Glass/Glass-ceramic sealing is always accompanied by issues of high porosity and brittle joints. To migrate these problems, an Ag foam was innovatively induced as an interlayer in the process of glass sealing the yttria-stabilized zirconia (YSZ) ceramic to Mn–Co spinel-coated Crofer 22 H stainless steel. Interlayer-added joints showed a significant reduction in porosity, and the shear strength was improved to 52.3 MPa, with an enhancement of 37.8 %. The influence of interlayer on the microstructure of the joint has been investigated and the formation process of the joint is illustrated. The Ag interlayer expels gases from the sealant material through expansion at high temperatures and promotes finer nucleation grains of crystallites integrating with the interlayer, reducing the porosity and alleviating the brittleness as well.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2026
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IF 3.2
Yuye Li,Tianao Liu,Tingting Du,Congzhi Hu,Youyong Pang,Yongping Liu,Botian Liu,Ling Li,Huidan Lu,Bin Huang
Dyes and antibiotics possess high stability and are resistant to microbial degradation, leading to their persistence in the natural environment. Photocatalysis is an effective and green degradation method. In this work, a novel Ag/AgCl/NH 2 -MIL-53(Fe) (AAF) heterojunction photocatalyst was prepared using a solvothermal method, precipitation method, and photochemical reduction method, which effectively promotes the separation of photogenerated charge carriers. The study shows that the composite consisting of 95 wt% Ag/AgCl/NH 2 -MIL-53(Fe) (AAF-95) can photocatalytically degrade 99.4% of RhB within 15 min and 82.4% of TC within 12 min, achieving higher photocatalytic degradation activity than the individual materials. The main active species involved in the degradation are h + and •O 2 - . Based on Mott-Schottky tests, radical trapping experiments, and UV-vis DRS, a possible photocatalytic degradation mechanism and the advantages are proposed: AAF-95 broadens the light absorption range, and the NH 2 -MIL-53(Fe) increases the specific surface area, thereby enhancing the catalytic reaction activity. The coupling between the heterojunction and the SPR effect promotes the separation of photogenerated charge carriers and lowers the catalytic reaction barrier. These are the reasons for the enhanced photocatalytic degradation capability of the composite.
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SPECTROSCOPY LETTERS
·
2026
·
IF 1.4
Luyao Niu,Shuaibin Wu
In this study, a new method for preparing surface enhanced Raman scattering detection material based on membrane was proposed. First, Zeolitic imidazolate framework-67 was modified on a polypropylene membrane by in-situ growth. Subsequently, Ag nanoparticles were modified on the membrane by in-situ synthesis. After characterization by scanning electron microscopy, energy dispersive spectrometer, infrared spectrometer, x-ray diffractometer, x-ray photoelectron spectrometer and so on, it could be proved that Zeolitic imidazolate framework-67 and Ag nanoparticles were successfully modified on the surface of polypropylene membrane. The polypropylene membrane modified with Ag nanoparticles@Zeolitic imidazolate framework-67 prepared by the in-situ method has the advantages of good uniformity and stability of Zeolitic imidazolate framework-67 and Ag nanoparticles. Based on the polypropylene membrane modified with Ag nanoparticles@Zeolitic imidazolate framework-67, sample loading and surface enhanced Raman scattering detection of methylene blue could be completed within 3 min. As a result, the analysis time, on-line, real-time and practicality of surface enhanced Raman scattering detection was improved. In the analysis of real samples, compared with the polypropylene membrane modified with Ag nanoparticles@methyl-sulfur functionalized Zeolitic imidazolate framework-67 prepared by the covalent method, the polypropylene membrane modified with Ag nanoparticles@Zeolitic imidazolate framework-67 prepared by the in-situ method also showed better surface enhanced Raman scattering detection performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
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IF 9.7
Yanchen Zhu,Kun Liu,Peng Fu,Linli Qin,Lulu Zhu,Wenyang Xu,Hao Ren,Huamin Zhai
The integration of photo-Fenton catalysis couple oxygen reduction reaction (ORR) has shown significant advantages in industrial water-pollution treatment. In this work, a ternary heterojunction catalyst (Ag@FeCo 2 O 4 /Defective-BiOBr, AFB) with rich oxygen vacancies (OVs) was developed by integrating defect engineering, Z-scheme heterojunction, and Ag surface plasmon for light/dark dual-mode pollutants degradation. A unique “three-channel” electron transfer mechanism was designed for the first time, enabling the enhanced electron migration dynamics. The density functional theory (DFT) theoretical calculation revealed that Fe/Co diatomic doping structure and OVs significantly reduced the H 2 O 2 activation energy, facilitating the radical formation. Under light irradiation, AFB exhibited efficient degradation (98.5 %, 40 min, pH = 3.0) of real-industrial pollutants driven by photo-Fenton degradation. Even in dark condition, AFB also showed the dark degradation capability, enabling 89.5 % degradation by Ag-catalyzed oxygen reduction reaction (ORR). Benefiting from this, AFB showed features of efficient degradation capability, wide applicability (light/dark dual-mode, pH = 3.0 ∼ 9.0), and full-day operation ability. Significantly, stability tests collectively indicated excellent stability in structure and environment resistance, as high as stable regeneration (over 90 % efficiency after five recycles), further supporting its potential in real system. This work provided a unique design and mechanistic insights of new material paradigm in sustainable AOP environment remediation, and supported for the self-adaptive response removal of challenging pollutions.
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INORGANIC CHEMISTRY
·
2018
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IF 4.7
Leyan Nian,Kui Wu,Guijie He,Zhihua Yang,Shilie Pan
In the exploration of new infrared nonlinear optical (IR NLO) materials, element substitution has been developed as an effective way to adjust the structural features and material performances. A series of new IR NLO materials have been discovered in the I–Ba–MIV–Q system (I = Li, Na, Cu, and Ag; MIV = Si, Ge, and Sn; Q = S and Se), and they undergo interesting structural transformation with different element substitution except Li analogues. Herein, we have successfully synthesized three selenides with different space groups (Ag2BaSiSe4: I4̅2m; Ag2BaGeSe4 and Ag2BaSnSe4: I222) in the above system and studied their properties through experimental and theoretical methods. Remarkably, the detailed analysis on the structural changes and properties comparison was also systematically investigated in the I–Ba–MIV–Q system and the results indicate that the distortion degrees of different IQ4 tetrahedra play the critical role to cause the structural transformation with the M or Q elements substitution. More importantly, we have also found that the structural changes have the close relationship with the distance d(I–I) between adjacent I cations in the I2BaSnSe4 system, which makes the four-membered rings formed by edge-sharing BaSe8 units change from the square to rhombus with the increase of d(I–I). The properties comparisons (band gap and NLO effect) in this system have been also systematically studied.
研究领域:
材料科学
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无机化学
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光学材料
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固态化学
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 22
·9382-9393
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IF 4.5
Wang Bingying,Zhang Keke,Gao Yijie,Liu Peng,Liu Bo,Zhang Zhansheng
The trend toward miniaturized and highly integrated chip packaging has created a pressing need for lead-free solders with high strength, toughness, and conductivity. In this paper, we designed a scheme of Al 2 O 3 -modified nanomaterial-reinforced low silver Sn1.0Ag0.5Cu (SAC105) solder matrix. To begin with, a novel amorphous carbon and nickel core–shell structure plating modified on Al 2 O 3 (C/Ni/Al 2 O 3 ) were prepared by the electroless plating method. Then, the nano-C/Ni/Al 2 O 3 particle as reinforcement phase was mixed into the matrix solder alloy by ultrasonic vibration stirring. Finally, the morphology and relationship between coated carbon, deposited nickel and original solder interface were analyzed. The microstructure and main properties of the modified solders were also investigated. The experimental results suggested that amorphous carbon and nickel film were prepared on the surface of Al 2 O 3 by electroless plating method. The outer layer of nano-Al 2 O 3 was coated with non-uniform thickness of nickel and carbon coatings. The mass percentage of amorphous carbon was about 3.50%. Adding C/Ni/Al 2 O 3 (0–0.5%) into the SAC105 solder matrix resulted in a gradual increase in conductivity and wettability. The strength and toughness of the modified solder alloy improved as well with the adjunction of reinforced phase. The tensile fracture surface exhibited from a mixture of ductile and brittle, characterized by dimples and cleavage surface, to a purely ductile mode consisting mainly of dimples.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Xiuling Xue,Xiaoyi Chen,Zongyu Zhang,Guofeng Fan,Tingting Ma
Graphite carbon nitride (g-C 3 N 4 ) has a strong photocatalytic capability to degrade ionic organic compounds due to its unique electrical structure with numerous marginal amino groups. A photocatalyst was fabricated via a facile in-situ sedimentation–calcine–hydrothermal method by anchoring AgBr and Bi 2 WO 6 onto the framework of phosphorus-doped g-C 3 N 4 (PCAB). The photocatalyst has been proven to have good photocatalytic degradation effect on different ionic organic pollutants. The removal rate of tetracycline, the target pollutant, can reach 99.2%, which was 1.83 times higher than that of g-C 3 N 4 within 60 min under visible light. Moreover, the degradation rates of dyes containing azo bonds and -SO 3 H can reach 100% within 20 min, as determined by the electrical relationship between the catalyst and the dye. The excellent performance can be attributed to the synergistic effect of the formation of mid-gap in g-C 3 N 4 after phosphorus doping, improvements in charge carrier transfer and the low recombination rate based on the construction of dual Z-scheme heterojunction and Ag bridge. In addition, cycling experiments and characterizations illustrated the high stability and reusability of PCAB. The main active species during photocatalytic process was·O 2 − , whereas h + and·OH played a minimal role. Ultimately, a dual Z-scheme mechanism was proposed to explain the photocatalytic reaction.
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BIOSENSORS & BIOELECTRONICS
·
2021
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IF 10.618
Zhenxing Wang,Hongli Zhao,Qianmei Gao,Kaicha Chen,Minbo Lan
Here we presented a new facile strategy to fabricate ultrathin two-dimensional (2D) metal oxide nanosheets , by using polydopamine-coated graphene (rGO@PDA) as a template under simply wet-chemical conditions. Based on the strategy, graphene-like CeO 2 –TiO 2 mesoporous nanosheet ( MNS-CeO 2 -TiO 2 ) was prepared and was loaded with dispersive Ag nanoparticles (AgNPs) to obtain effective electrocatalysts (denoted as Ag/MNS-CeO 2 -TiO 2 ) for electrochemical detection of superoxide anion (O 2 •− ). Characterizations demonstrated that MNS-CeO 2 -TiO 2 exhibited ultrathin thickness, larger specific surface area, and pore volume in comparison with its bulk counterpart. The above properties of MNS-CeO 2 -TiO 2 shorten electron transmission distance, promotes mass transfer, and is conducive to the dispersion of post-modified AgNPs. Therefore, the recommended Ag/MNS-CeO 2 -TiO 2 sensors (denoted as Ag/MNS-CeO 2 -TiO 2 /SPCE ) exhibited satisfactory properties, including the sensitivity of 737.1 μA cm −2 mM −1 , the detection limit of 0.0879 μM (S/N = 3), and good selectivity. Meanwhile, the sensors also successfully realized in the online monitoring of O 2 •− released from HepG2 cells, meaning the prepared sensors had practical application potential towards the analysis of O 2 •− in biological samples.
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Polymers
·
2020
·Vol. 12
·期 12
·3008
·
IF 3.426
Menghui Wan,Haodong Zhao,Lichao Peng,Xueyan Zou,Yanbao Zhao,Lei Sun
In this paper, we propose a facile and cost-effective electrospinning technique to fabricate surface-enhanced Raman scattering (SERS) substrates, which is appropriate for multiple analytes detection. First of all, HAuCl4∙3H2O was added into the TEOS/PVP precursor solution, and flexible SiO2nanofibers incorporated with gold nanoparticles (SiO2@Au) were prepared by electrospinning and calcination. Subsequently, the nanofibrous membranes were immersed in the tannic acid and 3-aminopropyltriethoxysilane solution for surface modification through Michael addition reaction. Finally, the composite nanofibers (Ag@T-A@SiO2@Au) were obtained by the in-situ growth of Ag nanoparticles on the surfaces of nanofibers with tannic acid as a reducing agent. Due to the synergistic enhancement of Au and Ag nanoparticles, the flexible and self-supporting composite nanofibrous membranes have excellent SERS properties. Serving as SERS substrates, they are extremely sensitive to the detection of 4-mercaptophenol and 4-mercaptobenzoic acid, with an enhancement factor of 108. Moreover, they could be utilized to detect analytes such as pesticide thiram at a low concentration of 10−8mol/L, and the substrates retain excellent Raman signals stability during the durability test of 60 days. Furthermore, the as-fabricated substrates, as a versatile SERS platform, could be used to detect bacteria ofStaphylococcus aureuswithout a specific and complicated bacteria-aptamer conjugation procedure, and the detection limit is up to 103colony forming units/mL. Meanwhile, the substrates also show an excellent repeatability of SERS response forS. aureusorganelles. Briefly, the prime novelty of this work is the fabrication of Au/Ag bimetallic synergetic enhancement substrates as SERS platform for versatile detection with high sensitivity and stability.Keywords:Ag/Au nanoparticles;synergetic enhancement;electrospun nanofibers;SERS substrates;versatile detection
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Bowen Zhao,Shuai Zeng,Xindong Qin,Zhengkun Li,Shiming Zhang,Haifeng Zhang,Zhengwang Zhu
Minor element addition will be considered to modulate the atomic structures of materials to achieve surface activation for enhancing catalytic capability. Herein, Ag minor alloying enhances the catalytic behaviors of Cu-Zr-Al MGs in degrading dye molecules due to in situ formed Cu-Ag nanocomposites as highly efficient and stable catalysts. The higher degradation efficiency and faster reaction rate for Cu 46 Zr 44.5 Al 7.5 Ag 2 ribbons than those of Cu 47.5 Zr 46 Al 6.5 ribbons are accurately achieved more than 99% efficiency and 0.32 min −1 reaction rate within 20 min after 30th run. The thermal activation energy barrier (ΔE) of 5.97 kJ mol −1 for Cu 46 Zr 44.5 Al 7.5 Ag 2 ribbons is lower than that of 8.47 kJ mol −1 for Cu 47.5 Zr 46 Al 6.5 ribbons. The enhanced capability can be attributed to the corrosion engineering and electrochemical principle, the inclusion of Ag as a cathode contributes to forming a micro-electric couple with Cu as an anode to generate a variety of active copper-based nanocomposites due to surface modification. More importantly, introducing Ag atom can promote the enrichment of Cu-Ag nanocomplexes on the surface of ribbons in order to provide stronger surface activity and faster electron transfer to further improve catalytic performance. These findings are expected to help open up new functional applications of CuZr-based MGs in environment field.
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ANALYST
·
2021
·Vol. 146
·期 15
·4858-4864
·
IF 4.616
Shuling Xu,Hefu Li,Meng Guo,Lei Wang,Xia Li,Qingwang Xue
DBP, one of the phthalic acid esters (PAEs), is known as an endocrine disruptor and is toxic to humans in abnormal concentrations. Here, a high-density and ordered SERS substrate based on the self-assembly of triangular Ag nanoplate (TAgNP) arrays is developed for DBP detection. Benefiting from the ordered arrangement and sharp corners of TAgNPS, the arrays can provide sufficient and uniform hotspots for reproducible and highly active SERS effects. Using Rhodamine 6G (R6G) as a reporter molecule, the SERS enhancement factor (EF) of the TAgNP arrays was found to be as high as 1.2 × 107 and the relative standard deviation was 6.56%. As a trial for practical applications, the TAgNP array substrates were used for the detection of dibutyl phthalate (DBP) in edible oils. In this assay, edible oil samples were added to hexane as an organic phase for the formation of the TAgNP arrays, which caused DBP to be loaded at hotspots. DBP in edible oils could be identified at concentrations as low as 10−7 M. This SERS substrate based on the TAgNP arrays has great potential applications in the high sensitivity and reproducible detection of contaminants in food.
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CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Chao Duan,Chaoran Liu,Xin Meng,Kun Gao,Wanli Lu,Yanling Zhang,Lei Dai,Wei Zhao,Chuanyin Xiong,Wenliang Wang,Yishan Liu,Yonghao Ni
3D Hydrogel is one of the most popular adsorbents for water remediation due to its excellent concentration/ adsorption capacity. However, it remains a challenge to use the hydrogel alone for treating complex wastewater. In this work, we designed and fabricated a versatile bio-based hybrid hydrogel consisting of Ag NPs@ MIL-100(Fe) photocatalysts and guar gum (GG) via facile blending and self-crosslinking. The hybrid hydrogel integrated with multifunctions of dye adsorption and degradation, oil/water separation and antibacterial properties, thus enabling its applications in complex wastewater remediation process. The presence of Ag nanoparticles (Ag NPs) not only enhanced the photocatalytic activity of MIL-100(Fe), but also imparted the antibacterial activity of Ag NPs@MIL-100(Fe)/ GG hydrogel. Particularly, the bio-based GG hydrogel scaffold showed excellent injectable, remodeling, and self-healing properties, which enabled an effective oil/water separation ability (silicone oil, cyclohexane and canola oil) and facilitated the recyclability/sustainability of the nano-photocatalyst powders. This novel multifunctional 3D hybrid hydrogel provides new opportunities for wastewater remediation purpose.
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