ACS Applied Energy Materials
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2025
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IF 5.5
Canwen Liu,Lin Zhou,Wenxue Wang,Yang Zhang,Su Zhan,Feng Zhou
Photocatalytic water splitting for clean energy production holds significant practical potential in addressing the global energy crisis. However, the oxygen evolution reaction (OER) remains the primary bottleneck in overall efficiency due to its kinetically sluggish and complex four-electron transfer process. Bi4Ti3O12 theoretically meets the reaction conditions of OER because of its high valence band value and unique layered structure formed by alternately stacking perovskite layers [Bi2Ti3O10]2– and bismuth oxide layers [Bi2O2]2+. However, its application in OER is limited due to its unsatisfactory charge distribution, poor separation efficiency, and low selectivity for O2. Therefore, the Ag-Bi4Ti3O12 composite photocatalyst was prepared by photodeposition. The Schottky barrier between the n-type semiconductor Bi4Ti3O12 and the noble metal Ag can be used as an effective charge transfer channel. This can alter the surface charge distribution and space charge separation efficiency of Bi4Ti3O12, prevent the selective generation of hydroxyl radicals, further enhance its product selectivity to O2, and raise Bi4Ti3O12’s OER efficiency. The results show that the OER rate of Bi4Ti3O12 after Ag loading is obviously improved, which is about twice that of unmodified Bi4Ti3O12. The research results of this work will provide research ideas for the design of efficient OER catalysts.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
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IF 6.3
Wenjian Chan,Yu Mao,Mengyang Wang,Yuanyuan Huang,Yanmei Deng,Ziyang Ren,Ening Gu,Xianzhong Lin,Guowei Yang
The fabrication of kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells based on fluorine-doped tin oxide (FTO) substrates, as an alternative to conventional molybdenum, is highly attractive for applications in semitransparent, bifacial and tandem photovoltaic devices. Although FTO exhibits phase stability during the high-temperature annealing process required for CZTSSe grain growth, its electrical conductivity decreases significantly, impairing carrier transport and limiting device performance. Addressing this issue necessitates lowering the annealing temperature without compromising the crystallinity of the CZTSSe absorber layer. In this study, we demonstrate the growth of high-crystallinity CZTSSe absorbers on FTO substrates at a reduced temperature of 500 °C, facilitated by silver (Ag) and sodium (Na) doping in the precursor film. The absorbers were fabricated from a 2-methoxyethanol-based molecular ink, and the annealing duration was systematically optimized. We found that the crystallinity and morphology of the CZTSSe layer are strongly influenced by annealing time. An optimal film morphology was achieved with a 15-min anneal, whereas shorter annealing (≤10 min) resulted in incomplete crystallization, and extended annealing (>20 min) promoted void formation within the absorber due to Ostwald ripening. Furthermore, the optimized annealing process reduces the interface defect density and broadens the depletion width of the device, leading to a record power conversion efficiency of 9.4 % for CZTSSe solar cells on bare FTO substrates. These results provide important insights for developing efficient bifacial CZTSSe solar cells.
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CHEMICAL PHYSICS LETTERS
·
2025
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IF 3.1
Ye Zhang,Xiaobing Yang
Recently, the overuse of tetracycline (TC) has caused persistent adverse effects on both ecological environment and human health. It needs to develop effective methods for removing TC from water. Herein, Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon was successfully synthesized and used as catalyst for degradation of TC. The influence of Ag 2 S and ZnIn 2 S 4 on the photocatalytic activity of TiO 2 @carbon were investigated. The results show that the Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon achieved a photocatalytic degradation efficiency of 98.73 %. Moreover, the photocatalytic activity of Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon remained nearly unchanged after four consecutive cycles, with only a 3.2 % decrease in degradation efficiency. Finally, the degradation mechanism of TC over Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon was elucidated.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Cunwei Wang,Man Peng,Xishun Peng,Haili Zhang,Caizhen Zu,Zhangwei Tan,Yuxue He,Zhongchen Bai
This study presents a surface-enhanced Raman scattering (SERS) sensing platform based on a MoS 2 /Au@Ag heterojunction for specifically detecting the residues of thiram pesticide. A Nano-MoS 2 film was firstly prepared by depositing MoS 2 nanosheets on the surface of a stainless steel sheet. Subsequently, Au nanoparticles and Ag nanoparticles were deposited on the surface of MoS 2 film to form a MoS 2 /Au@Ag heterojunction for SERS application. This well-performing SERS substrate was originated from the synergistic effect of electromagnetic (EM) enhancement and chemical (CM) enhancement to boost its SERS signal. Here, the CM contribution could be up to 41.8 % in the process of optimizing interfacial charge transfer (CT) pathways in MoS 2 /Au@Ag heterojunction. Thus, the SERS sensor based on MoS 2 /Au@Ag film showed an excellent signal homogeneity (RSD = 4.36 %) and an ultrahigh sensitivity to thiram molecules with a limit of detection (LOD) as low as 0.32 nM. Moreover, it could also recognize the thiram residues at 10 nM level in citrus peels, with a recovery rate of 91.0–109.0 %. The SERS sensor we developed in this study has a high sensitivity, excellent reproducibility, and long-term stability, which could be widely applied for the food safety monitoring
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PubMed
高影响因子
International Journal of Nanomedicine
·
2025
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IF 6.5
Jing Zhang,Min Zha,Shanghua Xiao,Nina Filipczak,Satya Siva Kishan Yalamarty,Xiangping Wu,Chenkai Gong,Xiang Li
Objective Nanoparticles constructed with silver/manganese dioxide (Ag@MnO2) as the core, in conjunction with survivin siRNA (sis) and cyclo(RGD-DPhe-K) (Ag@MnO2-sis-c-L), were prepared for integrated tumor diagnosis and therapy.Methods Ag@MnO2-sis-c-L particles were prepared and characterized. The silver and manganese content were determined by inductively coupled plasma optical emission spectroscopy (ICP-OES). The stability of sis in the system was evaluated by incubation with 50% FBS before the agarose gel electrophoresis experiment. The in vitro photothermal conversion ability, cytotoxicity to 4T1 cells, and cellular uptake of preparations were evaluated. The dialysis technique was employed to determine the in vitro release profile of Ag and Mn from Ag@MnO2-sis-c-L under various pH conditions. The pharmacokinetic behavior and tissue distribution of silver in vivo were detected by ICP-OES. Animal model experiments were conducted to further evaluate the anti-tumor efficacy of Ag@MnO2-sis-c-L against breast cancer in combination with infrared irradiation.Results Our newly synthesized Ag@MnO2-sis-c-L nanoparticles displayed superior physicochemical properties. The combined application of these nanoparticles with photothermal therapy (PTT) exerted the strongest synergistic inhibitory effects on tumor growth. Survivin protein expression in tumor tissues were markedly suppressed following delivery of nanoparticles loaded with sis. Additionally, magnetic resonance imaging revealed the high imaging capability of hybrid nanoparticles.Conclusion This study supports the potential utility of Ag@MnO2-sis-c-L coupled with PTT in therapeutic and diagnostic imaging applications.
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PubMed
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-8
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IF 4.259
Chen Xu,Zhou Donglei,Xu Wen,Zhu Jinyang,Pan Gencai,Yin Ze,Wang He,Zhu Yongsheng,Shaobo Cui,Song Hongwei
Localized electric filed enhancement by surface plasmon resonance (SPR) of noble metal nanoparticles is an effective method to amplify the upconversion luminescence (UCL) strength of upconversion nanoparticles (UCNPs), whereas the highly effective UCL enhancement of UCNPs in colloids has not been realized until now. Here, we designed and fabricated the colloidal Au-Ag nanocage@NaYF 4 @NaYF 4 :Yb,Er core-shell hybrid with different intermediate thickness (NaYF 4 ) and tunable SPR peaks from visible wavelength region to NIR region. After the optimization of the intermediate spacer thickness (~7.5 nm) of NaYF 4 NPs and the SPR peak (~950 nm) of noble metal nanoparticles, an optimum enhancement as high as ~25 folds was obtained. Systematic investigation indicates that UCL enhancement mainly originates from the influence of the intermediate spacer and the coupling of Au-Ag nanocages with the excitation electromagnetic field of the UCNPs. Our findings may provide a new thinking on designing highly effective metal@UCNPs core-shell hybrid in colloids.
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Desalination and Water Treatment
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2024
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IF 1
Xingtao Zuo,Jiajie He,Cong Ma,Juan Xiong
A novel polyvinylidene difluoride (PVDF) membrane containing Ag nanoparticles (nAg) was fabricated via a phase inversion method. The effect of the content of nAg on the performance of these membranes was extensively characterized. Antibacterial tests were also performed to examine the ability of the PVDF-Ag membranes to overcome biofouling. Scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction results confirmed the presence of nAg in the polymer matrix. The hydrophilic nature and antibacterial capacity of the membranes both depended on the nAg content of the membrane matrix (i.e., these parameters increased with the nAg content). On the other hand, the fouling mechanism of the prepared membranes was not modified upon incorporation of nAg. The PVDF membrane containing 0.2 wt% of nAg exhibited optimum transport properties, thereby showing great potential for developing high-performance antifouling membranes for separation processes.
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 18
·5451-5460
·
IF 6.641
Wubin Wu,Jingchao Wang,Tianyong Zhang,Shuang Jiang,Xiaoyuan Ma,Guanghui Zhang,Xia Zhang,Xingwei Chen,Bin Li
Different fusiform-shaped MIL-88A materials were successfully prepared by adjusting the mole ratio of the central metal ion and the organic ligand and using different polar solvents. With differently shaped MIL-88A supports, several Ag/AgCl@MIL-88A (ACML) were prepared successfully using the in situ growth method. These ACML composites showed a good photocatalytic activity under the simulated sunlight and visible light. The employment of Cl− ions, anchored on the surface of MIL-88A, could improve the dispersion and stability of the loaded Ag/AgCl nanoparticles. The s-ACML composite showed excellent photocatalytic stability during the cycle tests. The in situ growth strategy provided a facile method to design and synthesize MOF composite photocatalysts for wastewater treatment. In addition, based on the related optical and electrical characterization analysis, a possible mechanism of the ACML composite photocatalytic activity was proposed.
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ACS Applied Materials & Interfaces
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2012
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IF 4.525
Tianru Wu,Honglie Shen,Lei Sun,Bin Cheng,Bin Liu,Jiancang Shen
Graphene was synthesized by chemical vapor deposition using polystyrene as the solid carbon source. The number of graphene layers could be controlled by regulating the weight of polystyrene under atmospheric pressure at 1000 °C. Silver nanoparticles were then deposited on the graphene by a citrate reduction method. The interaction between graphene and silver was investigated by suface-enhanced Raman scattering spectra and X-ray photoelectron spectroscopy. The change in the G band position indicates n-type doping of the graphene due to an interaction between the silver and the graphene. Silver interlayer doped four-layer graphene shows a sheet resistance of 63 Ω/sq and a light transmittance of 85.4% at 550 nm. The optical and electrical quality of graphene exceeds the minimum industry standard for indium tin oxide replacement materials. It is clearly understood that the environmental sheet resistance stability of the interlayer doped graphene film is better than that of surface doped graphene sheets. The presence of graphene at the surface also acts as a protective layer for the inner silver ions and clusters
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Journal of Physical Chemistry C
·
2014
·
IF 4.835
Jing Wang,Weiqing Xu,Junjie Zhang,Shuping Xu
A kind of functional noble metal nanoparticles and metal/organic semiconductor composite nanomaterials, Ag nanoparticles (AgNPs, 6–10 nm in diameter) decorated small-sized Ag-tetracyano-p-tetrafluoroquinodimethane (AgTCNQF4) nanorods (150–400 nm in length and 60–100 nm in diameter), have been successfully synthesized through a rapid microemulsion reaction between TCNQF4 molecules and an AgNP colloid under a soft template of poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol). The morphology, chemical structure, and elemental composition of the prepared AgNPs–AgTCNQF4 composite nanorods were studied by transmission electron microscopy, selected-area electron diffraction, and X-ray photoelectron spectroscopy. The real-time ultraviolet–visible spectroscopy assisted with two-dimensional correlation spectroscopic analysis was employed to explore the growth of AgNPs–AgTCNQF4 composite nanorods in microemulsion. These composite nanorods display the photoinduced charge transfer (CT) property from the monoanion (TCNQF4–) to dianion (TCNQF42–) selectively under 532 nm light irradiation. The larger content of AgNPs on the surface of AgTCNQF4 led to the higher conversion of dianion due to the plasmon-assisted photocatalysis. This photoelectric composite material is promising for the applications of light-writing data storage and photocatalysis.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zhanbo Wang,Depeng Gong,Zezhen Zhang,Shilong Gao,Chaocan Zhang
First reported liquid-phase synthesis of copper nanorods from a highly concentrated copper precursor under low-alkalinity and low structure-directing agent conditions. • A highly oxidation-resistant conductive ink was prepared by electroless plating and by using an organosilane-modified polyurethane as the continuous phase. • The resulting conductive ink enables stable performance in flexible electronics applications, including motion sensing, physiological monitoring, human-machine interfaces, wireless communication, and electromagnetic interference shielding. Functional conductive inks are foundational to flexible electronics and demand tight control over the oxidation resistance and conductivity of the metallic phase, together with the rheology, mechanical compliance and thermal stability of the continuous phase, to optimise printability and device performance. Morphology control of the conductive phase is also essential; however, scalable, low-cost and environmentally benign syntheses remain challenging. Here reporting a strategy that addresses these barriers. Polyether diamine (ED-2003) serves as a structure-directing agent under low-alkalinity, ice-bath conditions, enabling, for the first time, large-scale copper nanorod production from a high-concentration precursor system. A facile, contamination-free electroless silver-plating step forms Cu@Ag core-shell nanorods with excellent oxidative stability, while functional-group incorporation into the polymer backbone of the continuous phase concurrently improves flexibility, thermal robustness and nanorod dispersibility. The resulting ink delivers ultrahigh conductivity (386,093.33 S cm −1 at 19 wt% solids) and retains 383,192.56 S cm −1 after one year in air. It prints high-resolution, uniform conductive patterns on latex, (polyurethane) PU, cellulose and PET, and the printed films maintain nearly constant conductivity after 10,000 bending cycles, and printed traces are stretchable to 1000%. Collectively, these results highlight the broad applicability of the ink in flexible printed electronic products and establish a new paradigm for the scalable manufacture of high-performance, low-cost printed conductive inks for flexible electronics. Download: Download high-res image (270KB) Download: Download full-size image
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Alexandria Engineering Journal
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2025
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IF 6.8
Yingming Mu,Haiya Zhang,Tao Ya,Liang Duan
Electrospun nanofiber membranes incorporating ZnO and Ag nanoparticles were developed using a coaxial electrospinning technique to address microbial contamination in urban water bodies. Polycaprolactone (PCL) served as the polymer matrix, and five formulations (S0–S4) with increasing nanoparticle concentrations were synthesized. Morphological analyses revealed uniform fiber formation with optimal distribution of ZnO and Ag at moderate loadings. S3 (3 wt% ZnO, 0.3 wt% AgNO₃) exhibited a mean fiber diameter of 487 nm, pore size of 2.0 µm, and porosity of 82.8 %. ATR-FTIR and XRD analyses confirmed the presence and dispersion of the incorporated nanoparticles without altering PCL’s structural integrity. Wettability improved significantly, with water contact angle decreasing from 114.3° (S0) to 93.4° (S4). Mechanical testing showed that S3 retained tensile strength (4.3 MPa) and ductility (180 % elongation). Antibacterial assays demonstrated a peak inhibition zone of 11.2 mm against Staphylococcus aureus and 10.4 mm against Escherichia coli . Filtration trials using simulated urban wastewater revealed that S3 achieved a log reduction value of 4.4 (corresponding to 99.996 % bacterial removal), reduced turbidity by 91.8 %, and lowered conductivity by 12.3 %. Despite reduced flux with increasing nanoparticle content, S3 maintained a satisfactory water flux of 112.6 L/m 2 ·h. These multifunctional membranes offer a promising route for enhancing microbial safety and improving physical water quality without the drawbacks of traditional disinfection. This study provides insights into nanoparticle–polymer interactions and offers design guidelines for practical, high-performance water purification systems in urban environments.
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