CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Yanting Liu,Qiumei Li,Lili Meng,Qi Pang,Yanzhu Wang,Hua Yao,Qian Chen
Currently, lanthanide (Ln 3+ ) doped double perovskites (DPs) suffer from poor controllability of doping and the high concentration quenching phenomenon. Herein, a novel efficient energy transfer (ET) host of Cs 2 NaLuCl 6 Rare-earth-based (RE-based) DPs via Ag + /Bi 3+ co-doping for further Ho 3+ doping is developed. Benefiting from Ag + /Bi 3+ - manipulated the parity of the wavefunction of the self-trapped exciton, intense self-trapped excitons (STEs) broadband warm white visible emission is boosted. Specifically, photoluminescence quantum yield (PLQY) of co-doping with Bi 3+ and Ag + ions in Cs 2 NaLuCl 6 under 350 nm excitation is dramatically promoted to 86.19 % with half maximum (FWHM) of 224 nm. Although the pristine crystal Cs 2 NaLuCl 6 exhibits intrinsic blue emission with FWHM of 75 nm. Furthermore, the ET channel from STEs to Ho 3+ was constructed by tri-doping Ho 3+ , and the effective red and near-infrared (NIR) emission of Ho 3+ was obtained. Finally, NIR light-emitting diodes (LEDs) and white LED based on Ho 3+ doped/undoped Cs 2 Na 0.8 Ag 0.2 Lu 0.98 Bi 0.02 Cl 6 DPs were prepared with different application features. Specifically, white LEDs showed higher color rendering index and lower associated color temperature, while NIR LEDs showed good night vision imaging. This work provides a new strategy for the design of an ET host suitable for Ln 3+ doping, avoiding the effects of the concentration quenching phenomenon that always occurs in heavily doped hosts and realizing controllable doping.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Lan Yang,Junyu Zhao,Chengyang Wang,Ruotong Pang,Daming Wang,Xiaogang Zhao,Chunhai Chen
In recent years, polymer-based composites with high thermal conductivity have become important for the effective removal of accumulated heat in thermal management devices, though enhancing the thermal conductivity of poly(ether imide) materials remains challenging. Herein, to prepare high-thermal-conductivity materials, silver nanoparticles are chemically reduced onto the surface of graphite nanoplates as hybrid fillers. Consequently, inspired by “cellular structures”, segregated thermally conductive networks in composites are designed by mixing hybrid fillers and poly(ether imide) microspheres, followed by a hot-pressing process. Benefiting from the three-dimensional heat-transfer network and the bridging effect of silver nanoparticles, thermal conduction pathways are easily constructed, reducing interfacial heat resistance in the polymer matrix. At a hybrid filler loading of 40 wt %, the through-plane and in-plane thermal conductivities reach 4.7 and 11.3 W/m K, respectively. Moreover, the finite-element simulation reveals that the composites have high thermally conductive ability owing to the hybrid fillers, which offer highly effective pathways for phonon transmission. Besides, polymer composites exhibit a great electrical magnetic shielding performance (30.5 dB). In summary, this study provides a strategy for fabricating thermally conductive polymer-based composite materials for use in industrial heat dissipation devices.
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LANGMUIR
·
2024
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IF 3.7
Xiaozhi Zhang,Yi Wang,Tiantian Wang,Shenghua Xue,Shujuan Liu,Qian Ye,Feng Zhou
In previous reports, covalent organic frameworks (COFs) have demonstrated significant potential as lubricant additives. Herein, we embedded Ag nanoparticles in the DT-COF (polycondensation polymer of 2,5-dihydroxyterephthalaldehyde and 4,4′,4″-(1,3,5-triazine-2,4,6-triyl) trianiline) matrix via the ball milling method and utilized this composite (Ag@DT-COF) as an additive for supermolecule oil gel. The low molecular weight gelator effectively mitigates the dispersion challenges of COFs in lubricant oil, while the embedded Ag nanoparticles enhance the repairing effect and antipressure performance of the lubricant. The resulting Ag@DT-COF gel exhibits a reduction in the average friction coefficient and wear volume of base oil by 46.0% and 87.5%, respectively, and increases the load-carrying capacity to 750 N. The remarkable tribological properties are attributed to the easy adsorption of DT-COF, antiwear characteristic of Ag nanoparticles, and the gelator that ensures the long-term stability of oil gel.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
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IF 4.3
Jin-Yu Zhou,Jian Zhu,Guo-Jun Weng,Jian-Jun Li,Jun-Wu Zhao
A novel surface-enhanced Raman scattering (SERS) composite substrates on the basis of Ag triangular nanoplates(Ag TNPs)-modified SiO 2 photonic crystals (PC) is fabricated and applied to the SERS detection of malachite green (MG). It consists of uniformly arranged Ag TNP@SiO 2 , a new PC. Notably, Ag TNP are uniformly aligned on the SiO 2 surface, forming a three-dimensional high-density hotspot nanostructure. With the tip “hot spots” of Ag TNPs, Bragg diffraction of SiO 2 and coupling enhancement between Ag TNPs and SiO 2 , the SERS enhancement of this composite substrates was multiplied. The effect on the SERS of Ag TNP@SiO 2 composite substrate was systematically optimized by tuning Ag TNP size, size of SiO 2 microspheres, coverage of Ag TNPs on SiO 2 and fabrication method of Ag TNPs and PC. Moreover, the uniform of SERS composite substrates and Raman signal was dramatically increased by the method of vertical deposition. Eventually, the SERS composite substrates were employed in MG detection. Its broad detection range of 1 pM–1 μM and low limit of detection (LOD) of 0.49 pM indicated acceptable sensitivity and repeatability. This work illustrates the promising applicability in food safety analysis based on SERS composite substrates composed by Ag TNP@SiO 2 with numerous SERS enhancements and excellent stability.
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Polymers
·
2024
·Vol. 16
·期 16
·2317
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IF 4.7
Peng Jiang,Kun Wang,Wenrui Liu,Yuhang Song,Runtian Zheng,Lihua Chen,Baolian Su
Converting carbon dioxide (CO2) into high-value-added chemicals using solar energy is a promising approach to reducing carbon dioxide emissions; however, single photocatalysts suffer from quick the recombination of photogenerated electron–hole pairs and poor photoredox ability. Herein, silver (Ag) nanoparticles featuring with localized surface plasmon resonance (LSPR) are combined with g-C3N4to form a Schottky junction for photothermal catalytic CO2reduction. The Ag/g-C3N4exhibits higher photocatalytic CO2reduction activity under UV-vis light; the CH4and CO evolution rates are 10.44 and 88.79 µmol·h−1·g−1, respectively. Enhanced photocatalytic CO2reduction performances are attributed to efficient hot electron transfer in the Ag/g-C3N4Schottky junction. LSPR-induced hot electrons from Ag nanoparticles improve the local reaction temperature and promote the separation and transfer of photogenerated electron–hole pairs. The charge carrier transfer route was investigated by in situ irradiated X-ray photoelectron spectroscopy (XPS). The three-dimensional finite-difference time-domain (3D-FDTD) method verified the strong electromagnetic field at the interface between Ag and g-C3N4. The photothermal catalytic CO2reduction pathway of Ag/g-C3N4was investigated using in situ diffuse reflectance infrared Fourier transform spectra (DRIFTS). This study examines hot electron transfer in the Ag/g-C3N4Schottky junction and provides a feasible way to design a plasmonic metal/polymer semiconductor Schottky junction for photothermal catalytic CO2reduction.
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PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Ao Cui,Jiale Yao,Jiang Xu,Rui Wang,Longyun Hao
In this research, PEDOT: PSS/Ag composite was successfully prepared by in-situ oxidation method, and the preparation conditions were optimized by adjusting the amount of APS and PSS . By utilizing FT-IR, XPS, TEM and ζ potential tests, the structure of PEDOT: PSS/Ag composite was characterized. Subsequently, the composite was coated on cotton fabric substrates through ink-jet printing to fabricate conductive coatings. To enhance the adhesion durability of conductive coatings, different dopamine (DA) solutions were further sprayed onto the surface of conductive coatings, and UV irradiation was used to initiate DA polymerization into polydopamine (PDA). For demonstrating the binding performance of PDA, The effects of solution pH, DA concentration and UV irradiation time on the coating durability to wash, friction and light exposure were measured and compared. The results indicated that the good polymerization of PDA on cotton fabric could significantly enhance the durability of conductive coatings to various external stimuli.
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Nanoscale
·
2025
·
IF 5.1
Jiasheng Wang,Tianyu Zhang,Jiliang Song,Fengxin Zhang,Hong Liu,Wan-Hui Wang,Ming Bao
Unsaturated alcohols (UOLs) are important fine chemical intermediates. Thus, it is of great significance to design and prepare catalysts for highly selective hydrogenation of CO of α,β-unsaturated aldehydes (UALs). In this paper, a fluffy mesoporous Al2O3-supported Ag–In2O3 catalyst (Ag-In2O3/f-m-Al2O3) was synthesized by employing a two-solvent method, in which Ag and In2O3 form a Mott–Schottky junction and lead to electron transfer from In2O3 to Ag. Electron-rich Ag repels the CC bond owing to “four-electron repulsion”, and electron-deficient In2O3 acts as the electrophilic site to adsorb the O atom of the CO bond, thus improving the selectivity towards UOLs. In addition to a larger specific surface area and smaller mass transfer resistance, the fluffy mesopore Al2O3 exhibits a large number of Lewis acid sites, which can further improve UOL selectivity. With the help of Ag–In2O3/f-m-Al2O3, high UOL selectivity can be obtained from UALs containing aliphatic, aromatic and heterocyclic groups. This elaborate design of the catalyst could contribute to the highly selective hydrogenation of UALs to UOLs.
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ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Pan Tao,Yang Luo,Kai Zheng,Jing Cao,Li Zhu,Xunsi Wang,Wei Zhang,Shixun Dai,Qiushun Zou,Peiqing Zhang
Background Permethrin is a pesticide used to kill insects, and once used in excess, it poses a great threat to the environment and human health, therefore, it is necessary to realize the rapid and accurate detection of permethrin. Fiber optic surface enhanced Raman scattering (SERS) probes have the advantages of small volume and can be used for remote monitoring, which have great potential for application in achieving in-situ detection of pesticide residues. Results Fiber taper waist (FTW) SERS probes modified by silver nanocubes-graphene oxide (Ag NCs-GO) composite structures were prepared for in situ detection of permethrin in lake water. Evanescent wave was used to excite SERS signals from Ag NCs-GO composite substrates, which was designed to enhance signals through expanded excitation light-analyte contact area. Ag NCs can provide stronger hot spots, and GO further enhances the sensitivity of SERS through electron transfer and improves the stability of the detection. The detection limit of prepared FTW SERS probe for Rhodamine 6G (R6G) was calculated to be 8.5×10 -9 M and RSD were all below 5% using the drop-casting method. The in-situ detection limit of R6G and permethrin in water was tested to be 10 -6 M and 10 -5 M, respectively. Significance This work utilizes fiber optic evanescent waves to excite SERS signals, and adopts a special FTW structure and SERS substrates to achieve good performance. The synergistic enhancement of electromagnetism and chemistry is realized while increasing the contact area, which improves the sensitivity of in situ detection of the pesticide residue permethrin. It Promotes the application of fiber optic SERS sensors in pesticide residue detection.
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Molecular Catalysis
·
2024
·
IF 3.9
Yinan Ren,Wei Li
Solar-driven CO 2 reduction into hydrocarbon fuels has a great potential for mitigating the issues of greenhouse effect and fossil energy crisis we are currently facing. It is a great challenge for visible-light-driven photocatalytic CO 2 reduction into CH 4 with high selectivity and conversion efficiency. Herein, we report a synthesis of N/K-doped TiO 2 nanospheres with Ag nanoparticles decoration (N/K-TiO 2 -Ag) by a solvothermal method and study its photocatalytic CO 2 reduction performance. It is found that the N/K-TiO 2 -Ag composite exhibits superior photocatalytic CO 2 reduction into CH 4 yield and selectivity than K-TiO 2 and N/K-TiO 2 . Indeed, the N/K-TiO 2 -Ag-0.5 sample shows the highest CH 4 yield with rate of 113.84 μmol g −1 h −1 and selectivity of CH 4 (93.71%) under light irradiation. The enhancement might be attributed to the synergy of N/K doping and silver loading. In particular, the N/K doping and the Ag cocatalysts introducing triggered improvement of solar energy utilization and charge separation as well as Ag-induced SPR effect and the K + -induced redistribution of photogenerated charge carriers cooperatively promotes photocatalytic CO 2 conversion into CH 4 . It is expected this work would offer a guide for rational design of K/TiO 2 -based photocatalyst for selectively converting CO 2 into fuels.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jie Ding,Jirong Mou,Sisi Lin,Yunlong Deng,Hongxi Liu,Xiangdong Ma,Jujun Yuan,Xiaokang Li
Solid polymer electrolytes (SPEs) are regarded as promising candidates for developing high energy–density Li metal batteries because of their flexible processability and low cost. However, the application of SPEs is still inherently impeded by the mediocre ionic conductivity and unstable Li/electrolyte interface. In this work, the silver fluoride (AgF) additive is introduced to optimize the ionic conductivity of PEO and induce the formation of stable solid electrolyte interphase (SEI) layer between Li metal and SPEs interface, thereby inhibiting the growth of lithium dendrites. AgF can be complex with anions to promote the dissociation of Li + -TFSI − ion pairs, improving the mobility of Li + ions, as confirmed by experimental and computational studies. Moreover, the AgF converses to LiF and Li-Ag alloys via in-situ electrochemical reaction with Li anode, which can not only prevent the Li metal from parasitic reactions, but also reduce the concentration gradient of Li + ions. Hence, the Li|Li symmetric cell containing PEO-3 % AgF electrolyte demonstrates stable cyclability for 1800 h at 0.2 mA cm −2 (60 °C). When paired with a commercial LiFePO 4 cathode, the resulting all-solid-state Li-metal battery delivers remarkable cyclic performance of 126.9 mAh g −1 after 400 cycles (0.5 C). This work provides a new approach for the development of composite solid-state electrolyte films and lithium metal anodes in all-solid-state batteries.
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TALANTA
·
2024
·
IF 5.6
Junhui Xiao,Wen Yao,Dongxu Yan,Jie Yang,Ziyin Qiu,Lishi Wang,Xinrong Guo
In this study, a core-shell structural nano-composite material, namely CdTeS@SiO 2 , is synthesized by a simple silanization of Te-doped CdS quantum dots (CdTeS QDs). Through SiO 2 capping, CdTeS QDs not only improve the fluorescence performance effectively, but also greatly enhance the anti-interference ability in the environment. Based on its excellent optical properties , a novel fluorescence sensor is constructed for the ultramicro detection of Ag + . The fluorescence of CdTeS@SiO 2 is strongly quenched in the presence of Ag + and shows good linearity in the range of 0.005–5.0 μmol L −1 with a detection limit as low as 1.6 nmol L −1 . This is mainly due to its unique quenching mechanism: Ag + destroys the spherical structure of SiO 2 and promotes the formation of non-radiative electron-hole pairs through electron transfer , leading to fluorescence quenching . At the same time, it competes with Cd for Te, S and MPA on the CdTeS surface, forming Ag–Te, Ag–S and Ag–MPA complexes attached to the CdTeS surface leading to wavelength red-shift. The feasibility of the proposed sensor is demonstrated through spiking experiments, which confirmed the potential value of the constructed fluorescence probe for real-world applications in detecting Ag + in environmental water.
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REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Xiangliang Meng,Jie Zhang,Honghui Guo,Jian Gao,Wei Li,Yuling Wu,Hong Yan,BaoLong Niu
MgO/Ag nanoparticles (NPs) have been surface modified with the silane coupling agent KH-570. The modified NPs (KMA) were added to poly (butylene succinate- co -terephthalate) (PBST) to prepare the K-PMA composite films. The modification improved the compatibility between MgO/Ag NPs and PBST matrix. The study comprehensively investigated the effects of modified MgO/Ag NPs on the mechanical, antibacterial, and preservation properties of bio-nanocomposite films. The incorporation of NPs substantially improved the mechanical and barrier properties of the PBST matrix. The composite films exhibited the best overall performance when the nanoparticle content is 3 %. In particular, the elongation at break, tensile strength, and water vapor permeability ( WVP ) were 794.67 %, 32.20 MPa, and 1.53 × 10 −11 g·m/m 2 ·s·Pa, respectively. Furthermore, the K-PMA-3 composite film exhibited excellent antibacterial properties and food preservation performance. The inhibition rates against Staphylococcus aureus ( S. aureus ), Escherichia coli ( E. coli ), and Salmonella paratyphi B ( S. paratyphi B ) were all over 98 %. After 6 days of preservation experiments, the mass loss of cherry tomatoes wrapped with K-PMA-3 film was only 5.9 %, which was only 45 % of the mass loss of cherry tomatoes wrapped with PMA-3 film. The results showed that the prepared biofilms have a great potential to be used as food packaging films.
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