ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xinyi Zhong,Jinlin Wang,Litao Han,JinJin Chi,Tong Liu,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yuena Meng,Yafang Qi,Qingbo Meng,Sixin Wu
In addition to open-circuit voltage (V OC ) loss, fill factor (FF) loss is considered another major factor restricting the further optimization of Cu 2 ZnSn(S,Se) 4 (CZTSSe) device efficiency. In this work, a comprehensive investigation into the loss mechanisms of FF has been conducted, and implemented a Li&Ag co-doping approach to enhance FF. The results indicate that the FF loss caused by insufficient carrier extraction is higher than that caused by non-radiative recombination. The carrier extraction capability is significantly influenced by the band alignment of the CdS/CZTSSe interface and has little relationship with the carrier concentration of the absorber. Therefore, although Ag doping reduces the hole concentration and conductivity, it reduces the FF loss caused by carrier extraction due to the improvement of band alignment. Ag doping is also superior to Li in passivating harmful defects, which helps reduce FF losses caused by non-radiative recombination. Correspondingly, Li performs better than Ag in increasing the hole carrier concentration and optimizing band alignment, greatly reducing FF losses caused by insufficient carrier transport. Finally, the Li and Ag co-doping strategy enables a 14.91% efficient kesterite solar cell with the highest reported FF to date of 74.30% through collaborative optimization of carrier extraction and suppression of non-radiative recombination.
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MATERIALS LETTERS
·
2025
·
IF 2.7
Yihui Qian,Wenqing Xue,Shuimiao Xia,Zhicheng Shi
The development of advanced electronic equipment provides new opportunities for the application of polymer films. However, polymer films are constrained by their relatively low energy storage density. To overcome this challenge, Au@Ag/BaTiO 3 nanofibers with different sputtering time are designed and prepared by the electrospinning and sputtering method. Experimental results show that the metal nanoparticles improve the charge storage capacity of the polymer and greatly elevate the dielectric constant. The limitation of charge carriers by the minuscule metal nanoparticles considerably increases the breakdown strength. Au@Ag/BaTiO 3 /P(VDF-HFP) composite film achieved the maximum discharge energy density of 13.93 J cm −3 at 655 kV mm −1 , which represents a 124% increase compared to P(VDF-HFP). This contribution provides a new and feasible direction for ceramic nanofibers to optimize the energy storage capacity of composite films in dielectric capacitors.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Yumin Guo,Meiran Chen,Yanjie Wang,Xianglong Lu,Jingjing Wu,Xin Tang
Zinc-air batteries (ZABs) are an emerging energy technology that is environmentally friendly and has a high theoretical energy density, but their commercial application is limited by the oxygen reduction reaction (ORR). Silver-based nanocatalysts can effectively improve the ORR performance. In this paper, a nanoporous Ag–Mn (NP-AM) electrocatalyst with bicontinuous ligaments was prepared by a combination of the melt-spinning technique and dealloying method. Theoretical calculations show that Mn-doped Ag(111) indicates a shift of the d-band center toward the Fermi energy level, which improves the adsorption energy of the OOH and thus reduces the overpotential of the decision step in the ORR process. Among them, the electrocatalyst NP-AM-5 reached a half-wave potential of 0.81 V (vs reversible hydrogen electrode (RHE)) with a limiting current density of −5.63 mA cm–2. Tests showed that its ORR process almost completely undergoes 4e– transfer with higher conversion efficiency and also exhibits better long-term stability in comparison to commercial Pt/C electrocatalysts. When used as the cathode of a zinc-air battery, the maximum power density reaches 140 mW cm–2. The discharge voltage can be maintained at about 1.2 V for a long period of time by discharging at a constant current of 10 mA cm–2, and the specific capacity is calculated to be 724 mAh g–1.
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Catalysis Science & Technology
·
2025
·
IF 4.2
Yuangong Ma,Youlin Huang,Wensheng Zhang,Zhishan Liang,Bo Ding,Dongfang Han,Dongxue Han,Li Niu
In the domain of photocatalysis, harnessing solar energy, particularly the near-infrared (NIR) spectrum, presents formidable challenges. To overcome these, a novel NIR-responsive photocatalyst, denoted as NYT@ZnO@RGO@Ag, was meticulously crafted. This photocatalyst comprises a NaYF4: Yb3+, Tm3+@ZnO structure supported on reduced graphene oxide (RGO) and further composited with silver nanoparticles. It was rigorously evaluated for its performance in photodegrading tetracycline (TC) antibiotics as a model compound. Leveraging the unique properties of upconversion materials, wide bandgap semiconductors, and localized surface plasmon resonance (LSPR), the NYT@ZnO@RGO@Ag catalyst exhibited an impressive photodegradation rate of 93.6% for TC under NIR light exposure. This efficiency surpassed that of NYT@ZnO (38.2%) and NYT@ZnO@RGO (72.3%). The remarkable enhancement in NIR-driven photocatalysis observed in NYT@ZnO@RGO@Ag is primarily attributed to the efficient process of fluorescence resonance energy transfer (FRET) from NYT to its each component. This process enhances photo-induced carrier generation and facilitates efficient transfer and energy utilization under NIR irradiation. The present study offers a promising approach for NIR-driven photocatalytic degradation of pollutants in environments with limited light exposure or even under dark conditions.
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TALANTA
·
2024
·
IF 5.6
Lekai Chang,Shuli Bai,Ping Wei,Xingyue Gao,Jinfeng Dong,Bingpu Zhou,Chao Peng,Jianbo Jia,Tiangang Luan
In this study, the plasmonic Ag nanoparticles (Ag NPs) were uniformly anchored on the high conductivity Nb 2 C T x (MXene) nanosheets to construct an Ag/Nb 2 C T x substrate for surface-enhanced Raman spectroscopy (SERS) detection of polystyrene (PS) nanoplastics. The KI addition (0.15 mol/L), the volume ratio between substrate colloid and nanoplastic suspension (2:1), and the mass ratio of Nb 2 C T x in substrate (14%) on SERS performance were optimized. The EM hot spots of Ag/Nb 2 C T x are significantly enlarged and enhanced, elucidated by FDFD simulation. Then, the linear relationship between the PS nanoplastics concentration with three different sizes (50, 300, and 500 nm) and the SERS intensity was obtained (R 2 > 0.976), wherein, the detection limit was as low as 10 −4 mg/mL for PS nanoplastic. Owing to the fingerprint feature, the Ag/Nb 2 C T x -14% substrate successfully discerns the mixtures from two-component nanoplastics. Meanwhile, it exhibits excellent stability of PS nanoplastics on different detection sites. The recovery rates of PS nanoplastics with different sizes in lake water ranged from 94.74% to 107.29%, with the relative standard deviation (RSD) ranging from 2.88% to 8.30%. Based on this method, the expanded polystyrene (EPS) decomposition behavior was evaluated, and the PS concentrations in four water environments were analyzed. This work will pave the way for the accurate quantitative detection of low concentration of nanoplastics in aquatic environments.
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PubMed
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Benlong Wei,Zhuannian Liu
Hybrid capacitive deionization (HCDI) is an innovative CDI technology that outperforms conventional CDI concerning desalination capability and charge efficiency. However, underutilized cathodes or anodes and mismatched kinetic behavior remain unsatisfactory given the imbalanced device architecture consisting of the capacitor and Faraday electrodes. Herein, we proposed a pseudo-capacitive behaviors induced dual-ion selective deionization (Di-CDI) strategy where molybdenum disulfide/polypyrrole (MoS 2 /PPy) acted as Na + intercalation cathode, and Ag-coated polyaniline-modified activated carbon (Ag@PANI/AC) served as Cl − trapping anode. In this system, the hollow PPy nanotube as the core is anchored by ultrathin MoS 2 nanoflakes, connecting loose MoS 2 nanoflowers to form a 3D flower-chain network, which holds convenient electron transfer routes and fast charge transport channels, facilitating accelerated ion diffusion process. Besides, Ag@PANI/AC was synthesized by modifying Ag particles on a 3D electron conduction substrate constructed by coupling PANI and AC, where Ag is responsible for the conversion reaction with Cl − to create AgCl. The conduction matrix compensates for the low conductivity of AgCl, enabling fast adsorption kinetics. As expected, the assembled Di-CDI system MoS 2 /PPy//Ag@PANI/AC delivers an excellent adsorption capacity of 25.1 mg g -1 , outstanding desalination rate (5.88 mg g -1 min -1 ), superior cycle stability (91.5% retention rate), and promoted charge efficiency of 56.2%, validating that this strategy supplies a viable way to achieve more energy-efficient CDI.
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RARE METALS
·
2021
·Vol. 41
·期 1
·86-95
·
IF 4.003
Tian Bang-Zhou,Jiang Xu-Ping,Chen Jie,Gao Han,Wang Ze-Gao,Tang Jun,Zhou Da-Li,Yang Lei,Chen Zhi-Gang
Abstract Interface engineering has been regarded as an effective strategy to manipulate the thermoelectric performance of materials. Here, we use a facile chemical electroless plating and a spark plasma sintering process to fabricate Ag-plated SnTe bulk. After sintering, a small amount of plated Ag can be doped into SnTe to suppress the Sn vacancies and the others form Ag precipitates with a size distribution from nanoscale to microscale, which introduces Ag/SnTe interfaces to enhance the Seebeck coefficient via energy filtering effect. Simultaneously, these structures result in strong scattering to reach a low lattice thermal conductivity of ~ 0.62 W·m –1 ·K –1 . Consequently, a maximum figure of merit ( zT ) of ~ 0.67 at 823 K is achieved in 2 wt% Ag-plated SnTe, which is ~ 60% higher than that of pristine SnTe. Moreover, the microhardness indentation test results show that the mean microhardness of 2 wt% Ag-plated SnTe is HV 64.26, which is much higher than that of pristine SnTe, indicating that Ag electroless plating can improve the mechanical properties of SnTe. This work has provided a facile and eco-friendly method to realize the interface engineering for manipulating the thermoelectric and mechanical properties of SnTe. Graphical abstract
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CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Feng Gao,Yifang Mi,Xinlei Wu,Jun Yao,Qi Qi,Wei Chen,Zhihai Cao
It is an urgent task to exploit effective antimicrobial agents due to the rise of drug-resistant pathogens. Herein, antimicrobial quaternized chitosan/Ag composite nanogels (QCS/Ag CNGs) with tunable properties were fabricated through inverse miniemulsion technique with a high encapsulation efficiency of NH 2 -Ag nanoparticles (NPs). The QCS/Ag CNGs possess superior broad-spectrum antimicrobial activity and low biotoxicity, via synergistic sterilization of Ag NPs and QCS. Furthermore, the NH 2 -Ag NPs were chemically linked to the QCS matrix through Schiff base reactions, and the QCS/Ag CNGs have reactive groups, making it possible to obtain durable antibacterial cotton fabrics. Thus, QCS/Ag CNGs modified cotton fabrics exhibited laundering durability of antimicrobial effect after 100 washing cycles without sacrificing other inherent properties of cotton fabrics. Our study provides a facile and controllable method to construct polymer/inorganic CNGs to address the urgent need for antibacterial agents/fabrics.
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高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Qinlei Liu,Yao Lin,Jing Xiong,Li Wu,Xiandeng Hou,Kailai Xu,Chengbin Zheng
A disposable, instrument-free, height readout paper-based analytical device (HR-PAD) based on a paper strip inkjet-printed with CdTe quantum dots (QDs) was developed for the sensitive speciation analysis of Ag+ and silver nanoparticles (AgNPs). When the paper strip is immersed into a sample solution, capillary action draws it through the surface and any Ag+ in the solution quenches the fluorescence of CdTe QDs via a cation exchange reaction between Ag+ and the CdTe QDs, with the height of the quenched band being proportional to the concentration of Ag+. In contrast, fluorescence quenching cannot be observed when only AgNPs are present in solution. Thus, the concentration of AgNPs can be obtained by subtracting the Ag+ content from the total silver determined by the HR-PAD after digestion with HNO3. Under optimized conditions, the methodology provides high selectivity, sensitivity, and accuracy for the detection of Ag+ or AgNPs in various samples, even at concentrations as low as 0.05 mg L–1. Precisions of 4.5% and 2.2% RSDs were achieved at concentrations of 1 mg L–1 and 7 mg L–1 of Ag+, respectively. Compared to conventional methods, this approach is inexpensive and user-friendly and eliminates the need for expensive and sophisticated detection instruments. The practicality of the method was demonstrated via the speciation analysis of AgNPs and Ag+ in river water and 12 commercial products with satisfactory results.
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Biomaterials Science
·
2022
·Vol. 10
·期 7
·1812-1820
·
IF 7.59
Yanping Xu,Dinghu Zhang,Jie Lin,Xiaoxia Wu,Xiawei Xu,Ozioma Udochukwu Akakuru,Hao Zhang,Zhewei Zhang,Yujiao Xie,Aiguo Wu,Guoliang Shao
Circulating tumor cells (CTCs) usually shed from primary and metastatic tumors serve as an important tumor marker, and easily cause fatal distant metastasis in cancer patients. Accurately and effectively detecting CTCs in a peripheral blood sample is of great significance in early tumor diagnosis, efficacy evaluation, and postoperative condition monitoring. In this work, a TiO2@Ag nanostructure is structured as a SERS substrate, rhodamine 6G (R6G) is used as a Raman signal molecule, the reduced bovine serum protein (rBSA) acts as a protective agent, and folic acid (FA) acts as a target molecule to specifically recognize cancer cells. A TiO2@Ag-based SERS bioprobe is successfully prepared with the feature of ultrahigh sensitivity, good specificity, low toxicity, and high accuracy in CTC detection. The remarkable SERS activity of the TiO2@Ag nanostructure is synergistically contributed by surface plasmon resonance and photon-induced charge transfer mechanism. The limit of detection for rhodamine 6G (R6G) molecules adsorbed on the TiO2@Ag SERS substrate is 5 × 10−14 M, and the corresponding SERS enhancement factor can reach 7.61 × 107. The designed TiO2@Ag–R6G–rBSA–FA SERS bioprobe is effectively utilized in detecting various cancer cells in rabbit blood, and the limit of detection (LOD) for the target cancer cell is 1 cell per mL. Notably, CTCs in peripheral blood of six clinical liver cancer patients are successfully recognized via the TiO2@Ag-based SERS bioprobe. Accurately recognizing CTCs in peripheral blood based on the TiO2@Ag–R6G–rBSA–FA SERS bioprobe is also carefully verified by in situ immunofluorescence staining experiments, which directly supports the CTC detection accuracy of the SERS strategy. These results demonstrate that the TiO2@Ag-based SERS bioprobe has great application potential in early screening and diagnosis of tumors.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2020
·Vol. 22
·期 1
·105
·
IF 4.556
Wanting Li,Zixuan Huang,Rui Cai,Wan Yang,Huawei He,Yejing Wang
Silver-based hybrid nanomaterials are receiving increasing attention as potential alternatives for traditional antimicrobial agents. Here, we proposed a simple and eco-friendly strategy to efficiently assemble zinc oxide nanoparticles (ZnO) and silver nanoparticles (AgNPs) on sericin-agarose composite film to impart superior antimicrobial activity. Based on a layer-by-layer self-assembly strategy, AgNPs and ZnO were immobilized on sericin-agarose films using the adhesion property of polydopamine. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray powder diffraction spectroscopy were used to show the morphology of AgNPs and ZnO on the surface of the composite film and analyze the composition and structure of AgNPs and ZnO, respectively. Water contact angle, swelling ratio, and mechanical property were determined to characterize the hydrophilicity, water absorption ability, and mechanical properties of the composite films. In addition, the antibacterial activity of the composite film was evaluated against Gram-positive and Gram-negative bacteria. The results showed that the composite film not only has desirable hydrophilicity, high water absorption ability, and favorable mechanical properties but also exhibits excellent antimicrobial activity against both Gram-positive and Gram-negative bacteria. It has shown great potential as a novel antimicrobial biomaterial for wound dressing, artificial skin, and tissue engineering.Keywords:sericin;AgNPs;ZnO;antimicrobial activity;green synthesis
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Mengting Liu,Wanyu Zhang,Ping Xu,Wenlong Tu,Edison Huixiang Ang,Yue Zhang,Jie Cheng,Miao Wang,Rongrong Du,Xia Yang,Fu Yang,Dawei Yu,Aihua Yuan,Yiyan Song
The complexity of environmental pollution poses a severe threat to public health, attracting considerable interest in the search for functional nanomaterials for dye removal and direct disinfection together in wastewater. Herein, we present a deft synthetic strategy for constructing Ag functionalized hierarchically structured nanosilica (Ag modified mesoporous silica/Ag-ms) using micelle termination incorporating Ag ions as a functional metallomicelle template. The results showed that multiple active Ag cores were decorated into silica nanospheres . The resulting silica has ultrahigh porous properties (1370 m 2 g −1 , 1.583 m 3 g −1 ) which are much superior to those of reports, thereby could make it a superior catalyst and disinfector. The obtained nanocomposites were carefully characterized using various advanced techniques to identify their special configuration and status of silver nanospecies in the silica. In addition, the cell viability test via cell counting kit-8 (CCK-8) assay displayed good biocompatibility of obtained Ag-ms, suggesting its promising candidate possibility for biomedical applications. Furthermore, the rapid catalytic reduction of methylene blue (MB) was easily enabled by the optimized Ag ms (0.15 Ag ms) within 5 min, which exhibited great catalytic kinetic properties (4.059 min −1 mg −1 ). Our results also showed that 0.15 Ag-ms had superior antibacterial properties against gram-negative Pseudomonas aeruginosa , gram-positive Staphylococcus aureus , and even multidrug-resistant (MDR) strain of Mycobacterium tuberculosis compared to other counterparts (0.05 Ag-ms and 0.1 Ag ms), which affords great value for reducing antibiotic-resistant bacteria and nosocomial infections.
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