JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Chenxi Guo,Mingxue Deng,Dongxin Shi,Xinyu Gong,Siyi Yu,Mengchao Xue,Keke Han,Boyuan Wang,Jiacheng Wang,Fengfeng Li
Fluorescent materials have been widely used in the field of anti-counterfeiting, but traditional fluorescent patterns are static by design, which only offer a limited level of security for anti-counterfeiting encryption. Herein, we provide a novel dynamic anti-counterfeiting strategy by constructing a flexible, long afterglow film with Bi-activated Sr 3 Y 2 Ge 3 O 12 phosphors. Theoretical calculation indicates that the Sr 3 Y 2 Ge 3 O 12 garnet matrix with suitable energy bands shows high adaptability for Bi ions activator to produce long afterglow emission. Doping of Bi ions into the framework of Sr 3 Y 2 Ge 3 O 12 exhibits a blue luminescence centered around 469 nm. The afterglow intensity and decay time reach the optimal with Bi 3+ doping concentration of 0.75 mol%. Various characterizations show that the electron traps mainly come from oxygen vacancies in the long afterglow process, and a possible afterglow mechanism is also proposed. A flexible, long afterglow film prepared by compositing with Sr 3 Y 2 Ge 3 O 12 :Bi 3+ can be written into the image information by ultraviolet light and present a dynamic image in the form of afterglow. The information decryption could be further performed by thermal excitation. The results illustrate that the Bi-activated Sr 3 Y 2 Ge 3 O 12 flexible film is a potential luminescent material that can be used for dynamic anti-counterfeiting and encryption.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 21
·52224
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IF 3.057
Chuangchuang Sun,Wei Zhang,Yihua Cui,Dongyue Liu
A phosphazene-triazine bi-base sulfonate compound (CPNS) was synthesized using hexachlorocyclotriphosphazene, cyanuric chloride, and sodium p-hydroxybenzene sulfonate as raw materials. The chemical structure was determined by FTIR, 1 H NMR 31 P NMR (NMR stands for nuclear magnetic resonance), and elemental analysis of P, Na. To study the flame retardant properties of CPNS, a series of modified polycarbonate (MPC) with different ratios of CPNS were prepared. The flame retardant performance and thermal stability of CPNS/MPC were characterized by limiting oxygen index (LOI), UL-94 vertical burning test, cone calorimetry test, and TG. Results show that when CPNS is added to 0.3%, the CPNS/MPC can pass the UL94 V-0 level with an LOI value of 35.3% and reduce the peak heat release rate by 16.89% during the combustion. TG results show that adding 0.1% CPNS can decrease the initial decomposition temperature of the MPC by 68°C in nitrogen and 27°C in air. The reduction of the initial decomposition temperature means that the flame retardant promotes the isomerization reaction of polycarbonate accelerates the formation of an intermediate char on the surface. Investigation of intermediate char residue's morphology and chemical structure demonstrates that CPNS promotes the formation of more complete and compact char residue, which acts not only there is increased opportunity for radical recombination reactions in the condensed phase but also as physical barriers to inhibit the transfer of heat and oxygen, resulting in good flame retardant properties.
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高影响因子
ACS Nano
·
2024
·
IF 15.8
Ao Huang,Linglong Kong,Bowen Zhang,Xuefan Liu,Lu Wang,Lifang Li,Jing Xu
Restructuring is an important phenomenon in catalytic reactions. Conversion-type materials with suitable redox potential may undergo in situ electrochemically driven restructurings and induce highly active catalytic sites in a working lithium–sulfur battery. Herein, driven by the electrochemical conversion reaction of BiVO4, a reversible catalytic cycle of Bi/amorphous Li3VO4 (a-Li3VO4) and Bi2S3/a-Li3VO4 heterojunctions is constructed, which targets the oxidation of Li2S and the conversion of polysulfide, respectively. The heterostructures and electrochemically driven size confinement provide abundant sites for shuttle restraining and sulfur conversion. Especially, the p-block Bi and Bi2S3 could dramatically reduce the conversion energy barriers of Li2S and polysulfide by virtue of the p–p orbital hybridization, promoting bidirectional reactions of the sulfur cathode. As a result, the corresponding sulfur cathode possesses a high reversible capacity of 7.5 mAh cm–2 after 120 cycles under a high sulfur loading of 10.3 mg cm–2 with a current density of 0.38 mA cm–2. This study furnishes a feasible scheme to obtain highly effective catalysts for bidirectional sulfur redox by utilizing the electrochemically induced restructuring.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Yanqi Ge,Fumei Yang,Yimiao Chen,Meng Wang,Weicheng Chen,Ye Zhang
van der Waals heterojunctions (vdWHs) have emerged as a promising strategy to improve the optoelectronic properties of materials for use in optoelectronic devices. In this study, independent tellurium nanotube (Te NT) structures with diameters of approximately 80 ± 10 nm were first synthesized. Subsequently, zero-dimensional (0D) bismuth quantum dots (Bi QDs) were uniformly deposited on the surface of one-dimensional (1D) Te NTs via a hydrothermal bottom-up assembly process, successfully constructing a mixed-dimensional Bi/Te van der Waals heterojunction (vdWH) with Bi QDs densely distributed around the Te NTs. The nonlinear optical properties of the heterojunction were systematically investigated. Due to the built-in electric field at the tellurium/bismuth interface, these vdWHs show significantly enhanced nonlinear absorption, lower saturation intensity, and improved carrier transport. These properties make Bi/Te vdWHs promising candidates for advanced optical applications. Furthermore, stable ultrashort pulses and bound-state solitons at a 1.5 μm wavelength were generated by incorporating Bi/Te vdWHs as saturable absorbers within an erbium-doped fiber laser cavity. Such findings highlight the potential of Bi/Te vdWHs as a versatile platform for developing high-performance optical devices with enhanced optoelectronic and nonlinear optical properties.
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Qun Lu,Aimin Sha,Wenxiu Jiao,Ke Shi,Zhuosen Li,Yujing Chen,Peidong Du,Ze Peng,Ruimeng Song
In the realm of sustainable road construction, bio-oil has emerged as a promising and eco-friendly alternative for rejuvenating aged asphalt. Nevertheless, challenges arise due to poor stability, diminished performance at elevated temperatures, and limited anti-aging properties. This study introduces an innovative approach by blending biochar, obtained from the pyrolysis of waste coffee grounds, into bio-oil to create a composite modified regenerator. Initially, the study conducts a microscopic characterization of the biochar using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). Subsequently, the rheological properties of this composite rejuvenated asphalt are evaluated across low, moderate, and high-temperature ranges using bending beam rheometer (BBR), linear amplitude sweep (LAS), and multiple stress creep and recovery (MSCR) tests. Departing from the traditional emphasis on initial property restoration, it further delves into performance alterations after re-aging of rejuvenated asphalt through temperature sweep (TS) and Fourier transform infrared spectroscopy (FTIR) tests, providing a comprehensive assessment of the anti-aging characteristics of rejuvenated asphalt. Additionally, gel permeation chromatography (GPC) is employed to quantitatively analyze the changes in asphalt molecular weight distribution. The microscopic characterization reveals the development of a rough and porous structure within the biochar, facilitating enhanced adhesion and interaction between the rejuvenator and the asphalt binder. Moreover, bio-oil rejuvenated asphalt exhibits excellent low-temperature crack resistance and moderate-temperature fatigue resistance. Following the incorporation of biochar, notable enhancements in high-temperature rutting resistance and anti-aging properties are observed, validating the efficacy of the biochar with bio-oil composite modified regenerator. To achieve optimal performance outcomes, a biochar content of 6 % (as a proportion of aged asphalt), corresponding to a 1:1 ratio of biochar to bio-oil, is recommended. Under this condition, the properties of the composite modified rejuvenated asphalt demonstrate comparability to those of the original asphalt. In summary, this research underscores the potential for integrating waste coffee biochar material into infrastructure development, thereby promoting circular economy principles and advancing more sustainable construction practices.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zeyu Wang,Yaling Jia,Shangqing Zhao,Huiling Zheng,Antony Rajendran,Wen-Ying Li
SnO 2 -based materials are promising electrocatalysts for the conversion of CO 2 to formate however increasing their activity further is challenging due to the suboptimal CO 2 adsorption and activation capacity. The interfacial engineering has proven effective in modulating the electronic structure and adsorption behavior of electrocatalysts. Herein, a heterostructure Bi/SnO 2 was constructed for the CO 2 electroreduction to formate in which a formate Faraday efficiency of 94.9 % and single-pass carbon efficiency of 40.3 % were achieved at −1.0 V versus reversible hydrogen electrode in 1.0 M KOH. During a 30-hour stability test, the current density was nearly constant without a significant decrease while the formate Faraday efficiency was maintained around 90 %. This remarkable activity is attributed to the strong electronic interaction arising from p–p orbital coupling at the Bi/SnO 2 interface, according to the experimental and theoretical investigations. The computational insights suggest that the p–p orbital coupling promotes the electron transfer from Bi to SnO 2 and optimizes the adsorption strength of the intermediate (*OCHO) to enhance the catalytic activity. The formation of *OCHO during formate generation was confirmed by the i n situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy. This work might contribute key insights into the mechanisms underlying activity enhancement via strong electronic interaction between dual p- block metal catalysts.
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PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Siyuan Cheng,Song Hu,Wenjie Wu,Jianghuai Yang,Pingsun Qiu,Xiyun He
A series of Bi-doped gadolinium iron garnet (Bi:GdIG) infrared-transparent ceramics were fabricated by a hot-press sintering process. The effects of Bi doping on the phase structure, microstructure and optical transmittance of GdIG ceramics were analyzed systematically. The grain size of Bi x Gd 3- x Fe 5 O 12 ( x = 0, 0.3, 0.6, 0.9) ceramic samples gradually decreased with the increase of Bi doping, and their optical transmittance gradually decreased, reaching about 70.7%, 62.9%, 56.9%, and 29.8% at 1550 nm, respectively. Meanwhile, the effects of Bi doping on the magnetic and magneto-optical properties of GdIG ceramics were investigated systematically. The saturation specific Faraday rotation angles ( θ F ) of the Bi x Gd 3- x Fe 5 O 12 ceramic samples reached about 51, −266, −595, and −968 deg./cm, respectively, which increased linearly with the increase of the Bi doping amount. The θ F increased by about 34 deg./cm for each 1 at% increase in the Bi doping amount, achieving comparable magneto-optical properties with Bi:GdIG single crystals produced by liquid phase epitaxy. It shows the bright prospects of Bi:GdIG ceramic materials in the field of magneto-optical applications.
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高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2021
·Vol. 40
·期 2
·247-255
·
IF 6
Qian Wang,Huanshun Yin,Yunlei Zhou,Lulu Cao,Zhengkun Yu,Yamin Xu,Shiyun Ai
Comprehensive Summary As a key epigenetic modification, 5-formylcytosine (5fC) controls many important cell functions, such as gene expression and cell differentiation. However, 5fC exists in mammalian tissues and cells with low content, and its structure is highly similar to 5-methylcytosine (5mC), 5-hydroxymethylcytosine (5hmC) and 5-carboxycytosine (5caC), which requires the detection method for detecting 5fC with high sensitivity and specificity. In this experiment, WS 2 /Bi/Bi 2 O 2 CO 3 was used as the photoactive material, 5fC antibody was used as the target molecule recognition reagent, and rolling amplification (RCA) was employed as the signal amplification strategy to construct a novel photoelectrochemical biosensor for detecting 5-formylcytosine deoxynucleotide (5fdCTP). Firstly, WS 2 /Bi/Bi 2 O 2 CO 3 nanocomposite was prepared and characterized, and then modified on the ITO electrode. Then, polyacrylic acid (PAA) was immobilized by electrostatic adsorption, which was employed as the antibody capture reagent based on the covalent reaction of –COOH on PAA with –NH 2 on Ab. Subsequently, 5fdCTP was recognized through immunoreaction, triggering the subsequent rolling circle amplification reaction with the aid of the crosslinker of Zr 4+ . Finally, positive methylene blue (MB) was adsorbed by negative ssDNA, resulting in an increased photoelectric conversion efficiency of WS 2 /Bi/Bi 2 O 2 CO 3 and improved detection sensitivity. The linear range of the PEC biosensor for detecting 5fdCTP was 0.05—100 nmol/L, and the minimum detection concentration was 12.4 pmol/L (S/N = 3). The applicability of this method has been evaluated by studying the influence of Cd 2+ and antibiotic concentration on the 5fC content in the genomic DNA of maize seedlings.
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高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Chaoyi Zhu,Hanwen Duan,Ying Yuan,Jinxi Li,Haixiang Li,Yingjun Li
The contamination of water sources by heavy metals poses significant risks to human health and the environment, driving the need for effective remediation strategies. Adsorption is considered one of the most efficient methods for removing metal ions from wastewater. While graphene oxide (GO) has shown promise as an adsorbent, its ability to adsorb metal cations is still limited. In this study, we enhanced the adsorption performance of GO through carboxylation, leveraging the ability of ionized carboxyl groups (-COO−) to form electrostatic and coordination complexes with Bi³+ ions. The influence of carboxylation degree on Bi³+ adsorption was systematically investigated, along with the role of reaction temperature in modulating the extent of carboxyl functionalization. Successful grafting of chloroacetic acid onto GO via nucleophilic substitution was confirmed through material characterization. XPS and ICP analyses demonstrated that higher carboxylation degrees, achieved at elevated temperatures, correlate strongly with improved Bi³+ adsorption. The carboxylated GO synthesized at 80 °C exhibited a maximum adsorption capacity of 12.18 mg/L. These results underscore that increasing the carboxyl group content significantly enhances Bi³+ uptake. This work offers a feasible strategy for designing functionalized GO-based adsorbents for the efficient removal of heavy metals.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Imtiaz Haider,Haoming Xu,Mianqi Xue,Jiechao Ge,Bao Wang,Serge Zhuiykov,Yanbin Cui
As Ni-based electrochromic (EC) materials have a wider band gap, low electron conductivity, and limited reactive sites, it is challenging for Ni-based EC materials to obtain high optical modulation with a realistic colored state and high coloration efficiency. This study presents Ni-Bi hydroxide (Ni-Bi-40, Ni-Bi-60, and Ni-Bi-80) for dual-functional EC and energy storage films, aiming to address challenges in Ni-based EC materials. By introducing Bi³⁺, which have a larger ionic radius than Ni²⁺, the films experience lattice strain, inducing crystalline distortions that expand interlayer spacing and enhance ion mobility. This leads to significant improvements in EC performance, with optical modulation values of 77 %, 80 %, and 60 % and transmissive colored states of 20 %, 2 %, and 0 % for Ni-Bi-40, Ni-Bi-60, and Ni-Bi-80 films, respectively. These films demonstrate high cyclic stability up to 7000 seconds and coloration efficiency of 49, 52, and 41 cm²/C. In terms of energy storage, the films achieve specific capacitance of 32.1, 58.3, and 65.4 F/cm² at 5 mV/s for Ni-Bi-40, Ni-Bi-60, and Ni-Bi-80 films, with GCD tests yielding 83.0, 153.0, and 365.0 mF/cm² at 8 mA/cm², respectively. These findings highlight the potential of Ni-Bi films for advanced multifunctional applications in energy-efficient technologies.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Rizwan Ahmed Malik,Muhammad Habib,Hussain Alrobei
Lead-free dielectric ceramic capacitors have attracted substantial attention for high pulsed power technologies, but achieving a large recoverable energy storage density ( W rec ) with high efficiency ( η ) and good thermal stability remains a bottleneck. In this work, we address this challenge in (Bi,Na)TiO 3 -based relaxor ferroelectric through a composition design strategy that induces local structure heterogeneity. This heterogeneity is created from the local random field/stress of the chemical modifiers due to different valence states and ionic sizes, which promotes the formation of polar nano-regions (PNRs). These PNRs minimize the energy barrier, resulting in an excellent energy storage performance, W rec of 8.53 J/cm 3 and η of 80.7 %. Moreover, the material exhibits breakthrough thermal stability, maintaining a W rec ≈ 3.41 ± 0.40 J/cm 3 and η ≈ 82.2 ± 8.2 % over a wide temperature range up to 240 °C. This study provides a path for designing advanced relaxor ferroelectric dielectric ceramic capacitors for energy storage applications.
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高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Qikai Wang,Cheng Ye,Yuhang Zhao,Wenwen Shi,Can Zhou,Jun Yan,Qiuhong Cui
Core-shell photonic microcapsules (PhMCs) have the advantage of rich structural color compared with homogeneous photonic crystal microspheres, and thus have higher application value. How to prepare structurally color controllable PhMCs with responsive functions is increasingly urgent, which is related to the possibility of further expanding their applications. In this report, we integrate microfluidic and controlled etching techniques to conveniently prepare structurally color controllable responsive PhMCs and successfully apply them in the fields of metal ion detection and optical anti-counterfeiting. Microfluidics endows PhMCs with controllable and homogeneous dimensions. Meanwhile, controlled etching gives PhMCs shells a controllable ratio of opal/inverse-opal structures. The fully-etched PhMCs were designed as metal ion detectors to identify the existence of metal ions in the solution through the change of structural color. Notably, the partially etched PhMCs have three structural colors of red/green/yellow, which is the first time that triple stop band gaps PhMCs have been prepared based on two materials. The triple information has been switched by adjusting the transmission/reflection modes and the temperature to explore the function of an optical anti-counterfeiting model. Our study provides a new path for the construction of functionalized PhMCs, and further expands its potential application value.
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高影响因子
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