JOURNAL OF THE ENERGY INSTITUTE
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2026
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IF 6.5
Bolun Wei,Yuning Ma,Yuxue Zhao,Kaihang Sun,Xin Tu,Chang-jun Liu
Multiple products are typically formed during CO 2 hydrogenation over oxide-supported metal catalysts, making the regulation of product selectivity both practically and fundamentally important. In this work, a silver-promoted In 2 O 3 catalyst (Ag/In 2 O 3 ) was synthesized using a deposition-precipitation method and employed as a model system to elucidate the pressure-dependent reactivity of the catalyst in CO 2 hydrogenation. A strong electronic metal-support interaction (EMSI) between Ag and defective In 2 O 3 (In 2 O 3-x ) is identified, which promotes the formation of catalytically active Ag-In 2 O 3-x interfacial sites. The Ag/In 2 O 3 catalyst exhibits a 100% CO selectivity at 0.1 MPa, while achieving high methanol selectivity at 5 MPa within the temperature range investigated. Kinetic analysis reveals that CO formation and methanol synthesis share the same active sites. Combined in situ catalyst characterization and theoretical calculations demonstrate that elevated pressure enhances CO adsorption and stabilizes surface CO*, thereby promoting the further hydrogenation of CO* to CH 3 O* and ultimately leading to high methanol selectivity. This work provides mechanistic insights into pressure-controlled selectivity in catalytic CO 2 hydrogenation and offers a promising strategy for tuning product distribution via the change in the pressure.
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高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Lin Mei,Zhentan Lu,Xinge Zhang,Chaoxing Li,Yanxia Jia
Herein, a nontoxic nanocomposite is synthesized by reduction of silver nitrate in the presence of a cationic polymer displaying strong antimicrobial activity against bacterial infection. These nanocomposites with a large concentration of positive charge promote their adsorption to bacterial membranes through electrostatic interaction. Moreover, the synthesized nanocomposites with polyvalent and synergistic antimicrobial effects can effectively kill both Gram-positive and Gram-negative bacteria without the emergence of bacterial resistance. Morphological changes obtained by transmission electron microscope observation show that these nanocomposites can cause leakage and chaos of intracellular contents. Analysis of the antimicrobial mechanism confirms that the lethal action of nanocomposites against the bacteria started with disruption of the bacterial membrane, subsequent cellular internalization of the nanoparticles, and inhibition of intracellular enzymatic activity. This novel antimicrobial material with good cytocompatibility promotes healing of infected wounds in diabetic rats, and has a promising future in the treatment of other infectious diseases.
研究领域:
纳米材料
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抗菌治疗
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生物医学工程
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传染病
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伤口愈合
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Nanomaterials
·
2022
·Vol. 12
·期 9
·1389
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IF 5.719
Jiahang Yu,Jun Qi,Zhen Li,Huixin Tian,Xinglian Xu
Monitoring food quality throughout the food supply chain is critical to ensuring global food safety and minimizing food losses. Here we find that simply by mixing an aqueous solution of sugar-stabilized Ag+and amines in an open vessel leads to the generation of Ag NPs and an intelligent evaluation system based on a colorimetric Ag+probe is developed for real-time visual monitoring of food freshness. The self-assembly reaction between methylamine (MA) generated during meat storage and the colorimetric Ag+probe produces different color changes that indicate changes in the quality of the meat. The colorimetric Ag+probe was integrated into food packaging systems for real-time monitoring of chilled broiler meat freshness. The proposed evaluation system provides a versatile approach for detecting biogenic amines and monitoring chilled broiler meat freshness and it has the advantages of high selectivity, real-time and on-site measurements, sensitivity, economy, and safety and holds great public health significance.Keywords:colorimetric Ag+probe;self-assembly;Ag NPs;amines;food detection
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Hang Jia,Zewei Wang,Rui Cai,Zhouli Wang,Yahong Yuan,Tianli Yue
Bacterial drug resistance caused by the abuse of antibiotics poses a serious threat to human health. Thus, the development of alternative strategies for the replacing of antibiotics is necessary. Herein, a hierarchical three-dimensional Bi 2 S 3 (BS) nanoflowers were facile fabricated and employed as supporter for the growth of silver nanoparticles (Ag NPs). Combining the excellent antimicrobial activity of Ag NPs, the as-resulted Ag/BS exhibited broad-spectrum antibacterial activity against pathogenic bacteria. Investigation on antibacterial mechanism revealed the treatment of Ag/BS damages the bacterial cell membrane , leading to the loss of intracellular substances. The compromised membrane caused the reduction of membrane bound enzymes activity , resulting in the arrest of metabolic activity. Simultaneously, Ag/BS broke the bacterial antioxidant defense system by raising the intracellular ROS levels, caused the oxidative damage , resulting in the loss of bacterial viability. Moreover, the satisfactory biocompatibility and effective antibacterial performance of Ag/BS were confirmed by performing in vitro cytotoxicity and in vivo antibacterial assay. Accordingly, this work opens up possibility for the construction of Bi 2 S 3 based multifunctional nanomaterials and its application for pathogenic bacteria control.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Xian Li,Pingying Liu,Jumei Li
In this study, a facile and efficient approach was proposed for fabricating magnetically separable core-shell structured nanocomposites consisting of a magnetic Fe 3 O 4 core, a mesoporous ZrO 2 (mZrO 2 ) interlayer and an outer Ag nanoparticles shell using a sol-gel process and a wet chemistry method at ambient condition, and the hydrothermal treatment . The resulting Fe 3 O 4 /mZrO 2 /Ag nanocomposites were analyzed by TEM and SEM images, XPS , EDX and XRD spectra. Their photocatalytic activity was examined for the degradation of methylene blue under UV light . The effect of initial concentration, catalyst dosage and pH value was investigated and the results were discussed. Fe 3 O 4 /mZrO 2 /Ag nanocomposites showed higher photocatalytic activity, compared with Fe 3 O 4 /mZrO 2 composites. The PL analysis revealed Fe 3 O 4 /mZrO 2 composites possessed the enhanced separation efficiency of electron-hole pairs in comparison with Fe 3 O 4 /mZrO 2 . Moreover, the Fe 3 O 4 /mZrO 2 /Ag nanocomposites can be easily separated and recycled with an external magnetic field, and so they present remarkable reusability.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 10
·3209-3218
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IF 6.177
Meng Tian,Jing Qian,Jiawei Hou,Yadi Bai,Hai-Ying Jiang,Jingyun Ren
Free silver ions (Ag+) in the solution exhibit enhanced photocatalytic dechlorination processes of organic chloride, including 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP) and 2,4,6-trichlorophenol (2,4,6-TCP), over copper phenylacetylene (PhC2Cu) under visible light irradiation. The concentration of AgNO3 remarkably affects the dechlorination activity of PhC2Cu. With the optimal concentration of 2 mM AgNO3, PhC2Cu showed the best photocatalytic performance, and the dechlorination rate of PhC2Cu was 2.3-fold enhanced under visible light irradiation for 80 minutes. This deep mechanism study demonstrated that free Ag+ in the solution, but not the deposited Ag particles on the surface of PhC2Cu, plays the most imported role in promoting the photocatalytic dechlorination process by forming the insoluble salt of AgCl.
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高影响因子
Journal of Materials Research and Technology-JMR&T
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2022
·
IF 6.267
Fengjuan Miao,Bingcheng Sun,Bairui Tao,Yanchun Wang,Paul K. Chu
In this paper, we demonstrate the application of a novel ternary nanocomposite MoS 2 /Ag/TiO 2 photoanode in high efficiency plasma dye sensitive solar cell (PDSSC). Ternary nanocomposites MoS 2 /Ag/TiO 2 was successfully synthesized by a simple solvothermal method without any hazardous substances. In order to achieve higher photoelectric conversion efficiency of DSSC, the photoanode’s ability of capturing light and electron transfer rates needs to be improved. Ag provides a power for light capture, while MoS 2 inhibits electron–hole recombination and promotes electron transport in the ternary nano-composite MoS 2 /Ag/TiO 2 . The nanocomposite was characterized by scanning electron microscope and transmission electronmicroscope, which indicated that the MoS 2 /Ag/TiO 2 was synthesized. Due to local surface plasmon resonance (LSPR), silver nanoparticles were doped onto TiO 2 nanoparticles, which greatly improved the optical parameters. The synthesis of Ag nanoparticles and MoS 2 was confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The performance of dye sensitive solar cell (DSSC) composed of ternary nano-composite material MoS 2 /Ag/TiO 2 was tested, the photoelectric conversion efficiency (PCE) reaches 9.3%, which is 26% higher than that of pure TiO 2 nanoparticle photoanode.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Yihan Yun,Wenlong Xie,Zhihua Yang,Guangmao Li,Shilie Pan
Birefringent materials are of great important as opto-electronic functional devices in solid laser system. Investigations on the design of new birefringent materials with large birefringence is meaningful. In this study, structure-birefringence relationship between AgGaS 2 (AGS) and NaGaS 2 (NGS) was systematically investigated. In the structures, the high ionic Na + cations broke the three dimensional (3D) [GaS] network to 2D layers, which results in the regular packing of GaS 4 tetrahedra and further the birefringence (~0.09, nearly twice that of AGS at ~1064 nm). Meanwhile, the blue-shift of the UV cutoff edge to 307 nm and a wide band gap of 3.9 eV has been observed in NGS. The property characterizations were carried out using the as-grown NGS single crystal with a size of 4 × 4 × 0.3 mm 3 by high temperature flux method. The results indicate that NGS may be a promising IR birefringent material and the cation substitution-oriented design strategy could be used to regulate the structure and optical properties of materials.
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高影响因子
Crystals
·
2021
·Vol. 11
·期 12
·1521
·
IF 2.589
Jiabin Hao,Zeming Wang,Huiying Hao,Guanlei Wang,Hongcheng Gao,Jianyu Wang,Bing Pan,Qiang Qi
So far, it is still a great challenge to prepare high efficiency organic–inorganic perovskite solar cells in ambient air. Specifically, moisture is easily combined with the perovskite material during the spin-coating process, which result in porous perovskite films with poor surface morphology. In this study, we investigated crystalline Ag-doped perovskite films by a one-step spin-coating method in air with 30–40% relative humidity (RH), in which ethyl acetate (EA) was used as antisolvent can absorb moisture in air to reduced nucleation density. More significantly, EA is a feasible and environmentally friendly solvent to replace highly toxic solvent. Moreover, 1.0% Ag-doped device shows a highest power conversion efficiency (PCE) of 14.36%. The improved performance is not only ascribed to the superior CH3NH3PbI3film with high crystallinity but to the versatile tunability of energy band structure.Keywords:perovskite solar cells;Ag-doped;30–40% RH;ethyl acetate (EA)
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高影响因子
Journal of Industrial Textiles
·
2021
·
IF 3.732
Xueyan Bian,Jiangtao Xu,Yi Pu,Jing Yang,Ka-lam Chiu,Shouxiang Jiang
Surface enhanced Raman scattering (SERS) has proven to be increasingly valuable as an analytical tool since this phenomenon was first observed in 1973. However, challenges still exist to ensure their ability to access targeted analytes and adequate levels of sensitivity to them on irregular surfaces. Herein, silver (Ag) nanoparticles are deposited onto cotton fabric through magnetron sputtering to develop a flexible and ultrasensitive SERS-active substrate. To obtain a better enhancement effect, Ag nanoparticles of different sizes are produced by controlling the argon flow rate and the sputtering time. The finite-difference time-domain (FDTD) method and Raman mapping are used to explain the process behind Raman signal enhancement. The cotton fabric sample with Ag nanoparticles deposited at an argon flow rate of 200 sccm (labelled as AC-200) shows a high enhancement factor (EF) of 104 with a Methylene blue (MB) solution of 10−3 M, stability with a related standard deviation (RSD) of 1.03%, excellent reproducibility with an RSD of 1.92% and high sensitivity with 10−9 M of MB solution. Therefore, AC-200 demonstrates exceptional SERS signal reproducibility and stability for different types of chemical analytes and has the potential to be used in future practical applications.
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MATERIALS LETTERS
·
2021
·
IF 3.423
Qi Han,Yan Li,Xiaopeng Lu,Di Mei,Qianqian Chen,Tao Zhang,Fuhui Wang
Antibacterial plasma electrolytic oxidation (PEO) coatings have been fabricated by in-situ incorporation of Ag particles on pure Mg. It was found that the Ag particles have been partly oxidized and incorporated into the layer during coating formation process. Ag containing PEO coatings can strongly inhibit the growth of S. aureus and the antibacterial efficiency of the coatings is mainly associated with the Ag concentration in the layer. The antibacterial rate of the coating reaches 99% and is maintained to be stable when sufficient Ag particles (above 1 wt%) are incorporated into the layer.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 16
·21297-21307
·
IF 2.478
Cao Yong,Luo Penghui,Xu Yang,Zhang Cong,Tian Chang,You Yuanqi,Tian Meiling,Wang Liqiong,Zhou Shenggang
In this paper, a hydrothermal synthesis method synthesized a foamed nickel (NF)-supported Ag-doped Ag 2 S@MoS 2 hydrogen evolution catalyst. Silver doping can improve the conductivity of MoS 2 , thereby improving the hydrogen evolution activity of MoS 2 . Compared with a single MoS 2 , the Ag 2 S@MoS 2 electrode has a larger specific surface area and has many highly catalytic S edges. In 1 M KOH, the overpotential of Ag 2 S@Ag 0.33 MoS 2 /NF electrode at 10 mA cm −2 is approximately 188 mV. Comparing with the overpotential of NF (391 mV) and MoS 2 /NF (290 mV), it is much lower. Further changing the amount of silver added, the overpotential of Ag 2 S@Ag 0.5 MoS 2 /NF is further reduced to 165 mV at a current density of 10 mA cm −2 . When the voltage is 0.35 V, the current densities of Ag 2 S@Ag 0.33 MoS 2 /NF (42.45 mA cm −2 ) and Ag 2 S@Ag 0.5 MoS 2 /NF (55.5 mA cm −2 ) are higher than those of NF (4.91 mA cm −2 ) and MoS 2 /NF (20.51 mA cm −2 ).
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