CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shuangyin Zhu,Shilin Jin,Jiamin Chen,Tao Pang,Lingwei Zeng,Lei Lei,Fengluan You,Daqin Chen
Greenlight is a sensitive band of the human eye, improving the luminous quality of the green part is crucial to the performance improvement of LED. However, the application prospects for Tb 3+ are greatly limited by its 4f-4f forbidden transition. In this study, we successfully synthesized Ba 2 MgY 2 (BO 3 ) 3 :Ce 3+ blue phosphor which effectively enhances its luminous properties through energy transfer. By introducing both Ce 3+ and Tb 3+ into the Ba 2 MgY 2 (BO 3 ) 3 matrix, an energy transfer efficiency of 50.6 % is achieved between these two ions, resulting in a remarkable 13.1-fold increase in Tb 3+ luminous intensity. The internal quantum efficiency (IQE) of the sample is measured at 63 %, while the external quantum efficiency (EQE) reaches 30 %. Furthermore, it exhibits good thermal stability and promising applications in temperature sensing due to the sensitivity and coordinated luminescence of Ce 3+ and Tb 3+ ions at different temperatures. Finally, when combined with a 365 nm chip, this sample produces a white LED (WLED) with a color rendering index (CRI) of 81.6 and a correlation color temperature (CCT) of 4330 K.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
Insects
·
2020
·Vol. 11
·期 2
·94
·
IF 2.22
Jihong Zhang,Huyin Li,Maorong Liu,Huan Zhang,Hai Sun,Hongtuo Wang,Lin Miao,Miaomiao Li,Ruihao Shu,Qilian Qin
Population control of small sucking insects has been challenging, and alternative control methods are constantly being sought. Visual traps have long been used to monitor and control pests. Colored sticky cards are widely used for diurnal pests, but their effects are influenced by environmental light conditions. Artificial light traps are mostly used for nocturnal pests. Here, we explored and evaluated light-emitting diode (LED) traps for the monitoring and control of small diurnal sucking insects using greenhouse tests targeting the greenhouse whiteflyTrialeurodes vaporariorum. We tested the trapping efficacy of the LED water pan trap, assessed the most attractive LED light and analyzed its efficacy under different weather conditions. The results showed that the LED water pan trap was too inefficient to be useful. Green LEDs were more attractive than yellow LEDs, UV LEDs and green-UV combinations. Regardless of sunny or cloudy conditions, the green LED trap caught more than twice the number of whiteflies than the yellow sticky card alone under summer shading conditions. Our study suggests that LED traps have a significant field application value in whitefly mass trapping and may also be efficient for other diurnal insects. The design of LED traps specific for diurnal insects is discussed.
研究领域:
昆虫学
·
农业科学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Jinze Lan,Liang Luo,Maomao Wang,Fan Li,Xiaoxia Wu,Fu Wang
CsPbX 3 (X = Cl, Br, I) perovskite colloids have attracted considerable attention because of their excellent optical properties , low-threshold lasing, and multicolor electroluminescence . Much work on synthesis and application of CsPbX 3 have been performed in the past several years. In this study, a novel robust one-pot synthesis method of CsPbBr 3 nanocrystals (NCs) was developed, in which all the precursors are heated together in a flask. Gram-scale CsPbBX 3 NCs with a fluorescence quantum yield of around 77% was achieved in a few minutes. A green light-emitting diode (LED) was fabricated by coasting CsPbBr 3 NCs on the surface of an industrially available blue chip. The fabricated LED emitted bright-green light with high color purity. This method provides a simple and efficient method for the large-scale preparation of high-quality CsPbBr 3 NCs, and might pave the way for their practical applications in green LEDs.
研究领域:
材料科学
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纳米技术
·
光电
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Denan Mu,Jinfeng Xing
Double network hydrogel with excellent mechanical properties is a polymer material composed of interpenetrating polymer network structure. In this study, poly(acrylamide-co-acrylic acid)/sodium alginate (P(AAM-co-AAC)/SA) hydrogels were rapidly prepared by photopolymerization under green LED irradiation. Subsequently, poly(acrylamide-co-acrylic acid)/sodium alginate/tannic acid (P(AAM-co-AAC)/SA/TA) hydrogels were prepared by immersion method. The morphology, mechanical properties, the wet adhension ability and swelling behaviour morphology of P(AAM-co-AAC)/SA/TA hydrogels were studied in detail. The double network hydrogel has excellent mechanical properties, with the elongation at break and tensile strength reaching 862% and 0.77 MPa respectively. The hydrogel with tannic acid showed excellent adhesion, wet adhesion and anti-swelling capability. Our research provides a more efficient and environmentally friendly preparation method for hydrogels used in wet environment.
研究领域:
材料科学
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高分子化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Yang Tang,Qingyu Xie,Xuanming Zhang,Jiwei Ma,Hao Xie,Yongfeng Liu,Liang Zhao,Dongdong Yan,Xiaoyu Wang,Weixiang Ye
Cs 3 Cu 2 Cl 5 nanocrystals (NCs) have emerged as promising optoelectronic materials owing to their efficient self-trapped exciton (STE) emission. However, their limited environmental stability has significantly constrained their application in light-emitting diodes (LEDs). In this work, a facile ambient-air synthesis strategy is developed for Mg 2 ⁺-doped Cs 3 Cu 2 Cl 5 NCs that simultaneously addresses both stability and emission efficiency challenges. Remarkably, optimal Mg 2 ⁺ doping (20%) enhances the photoluminescence quantum yield (PLQY) from 28.69% to 59.3%. Comprehensive theoretical investigations through density of states (DOS) calculations and ab initio molecular dynamics (AIMD) simulations demonstrate that Mg 2 ⁺ doping induces bandgap narrowing for enhanced radiative recombination while reinforcing the crystal lattice stability. When integrated with a UV LED chip, the optimized NCs enable the fabrication of high-performance green LEDs exhibiting outstanding luminance (17 281 cd m − 2 ) and excellent color stability (CIE coordinates: 0.354, 0.518). This study provides not only a practical synthetic approach for stable copper halide NCs but also valuable insights for designing efficient STE emitters for optoelectronic applications.
研究领域:
材料科学
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光学工程
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2023
·
IF 5.1
Siyuan Yu,Yanting Zhou,Chunyue Zhao,Han Liu,Zhiyun Xue,Jinfeng Xing
Dispersion photopolymerization was carried out under green LED irradiation to rapidly prepare monodisperse poly(methyl methacrylate) (PMMA) microspheres with small size by using a high-efficient three-component initiating system. The polymerization parameters including exposure time, MMA content, stirring speed, water ratio and PVP content were systematically investigated. Crucial parameters were further optimized by response surface method (RSM), and a corresponding polymerization mechanism was proposed. Finally, PMMA microspheres with 375.6 nm of size and 0.101 of PDI were prepared. This study provides a facile method for the rapid fabrication of PMMA microspheres.
研究领域:
材料科学
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高分子化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Shujie Liu,Zhen Wang,Jinfeng Xing
Hydrogels have been widely used in wound dressings due to their excellent moisture retention and biocompatibility. In this study, a poly(N-[tris(hydroxymethyl)methyl]acrylamide-co-acrylamide) (P(THMA-co-AAM)) hydrogel was rapidly prepared by photopolymerization under green LED irradiation within 5 s. The P(THMA-co-AAM) hydrogel exhibits excellent mechanical properties, self-healing properties, adhesion ability and prominent biocompatibility. Moreover, the tunable multifunctional hydrogel (P-QCS) prepared by adding quaternary chitosan to the P(THMA-co-AAM) hydrogel exhibits attractive antibacterial properties. Notably, our strategy provides a universal platform to combine various functional substances to generate multifunctional hydrogels for the application of hydrogels in wound dressing.
研究领域:
材料科学
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生物医学工程
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伤口愈合
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qingyun Liu,Boxuan Peng,Jiahui Li,Fangzheng Zhao,Enchang Liu,Huizhen Han,Tong Wu,Jinfeng Xing
To overcome the inherent mechanical limitations of polysaccharide hydrogels for dye adsorption, we developed dual-network hydrogel microspheres via efficient one-step droplet photopolymerization initiated by green LED. The primary network was photopolymerized from sodium acrylate monomers and ethylene glycol dimethacrylate cross-linker, while the secondary network formed through Schiff base conjugation between oxidized chondroitin sulfate and carboxymethyl chitosan. Systematic characterization (FTIR, TGA, SEM, XPS) confirmed the hydrogels' structural and thermal properties. Key operational parameters including contact time, temperature, initial MG concentration, pH, and ionic strength were optimized. At room temperature, adsorption equilibrium was achieved within 3 h, following pseudo-second-order kinetics. The adsorption capacity is 806.51 mg/g and fitted the Langmuir isotherm model. Electrostatic interactions dominated the adsorption mechanism, as verified by pH and ionic strength experiments. After five adsorption-desorption cycles, MG removal efficiency remained more than 80 %.
研究领域:
高分子科学
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环境工程
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材料科学
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化学工程
·
吸附技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 44
·15967-15976
·
IF 7.393
Xiankan Zeng,Wen Li,Cheng Yan,Jingjing Cao,Xuehai Fu,Weiqing Yang
Controllable crystallization growth of perovskite films with excellent morphology and outstanding properties is a key and intractable problem for efficient and stable perovskite optoelectronic devices. However, the inhomogeneous inherent defects at the grain boundaries and interfaces make it difficult to uniformly release the residual stress during the growth process of perovskite films. Here, a molecular needle knitting strategy with dimethyl sulfoxide solvent as needles and polyoxyethylene molecular chains as threads was proposed to reveal the growth mechanism of perovskite–polymer composite films. Owing to the knitted net-structured cages synergistically constructed by the molecular needles and threads, the perovskite precursors can be uniformly assigned to each cage and nucleated evenly for the effective residual stress release under the formed spatial confinement effect. Compared with no confined cages, this obtained CsPbBr3 film via the molecular needle knitting strategy showed 50% enhanced photoluminescence quantum yield together with 40% improved stabilities. Based on this CsPbBr3 film and an UV LED chip (365 nm), we fabricated a high-stability and pure green LED lamp (528 nm). This work may open a way to achieve high quality fluorescent perovskite films and further extend their practical application in lighting and display fields.
研究领域:
材料科学
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光电技术
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纳米技术
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Fangzheng Zhao,Junxia Deng,Tong Wu,Jia Liu,Rijie Wang,Jinfeng Xing
Multifunctional materials with hemostasis, adhesive, and antibacterial properties must be developed to meet the demand for wound hemostasis. In this work, a hybrid hydrogel (ATD-HAp hydrogel) based on a terpolymer and hydroxyapatite (HAp) was prepared by photopolymerization within 1 min under green LED irradiation. The polymer chains of ATD-HAp hydrogel with adjustable tensile and adhesion properties and antibacterial properties were formed by copolymerization of acrylamide, N-[tris(hydroxymethyl)methyl] acrylamide, and dimethyldiallylammonium chloride and methacrylated carboxymethyl chitosan as a cross-linking agent. HAp was added to the hydrogel to release Ca2+ to promote coagulation. The results showed that ATD-HAp hydrogel had good tensile (196.7 kPa), wet-adhesive (10.3 kPa), self-healing, antibacterial properties, and coagulation. And the ATD-HAp hydrogel had excellent blood compatibility and biocompatibility. Furthermore, the experimental results of the hemostasis model in mice proved that the ATD-HAp hydrogel can significantly shorten the hemostasis time and reduce blood loss. Therefore, the ATD-HAp hydrogel has great potential in the field of wound hemostasis.
研究领域:
材料科学
·
生物材料
·
生物医学工程
·
伤口愈合
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Siyuan Yu,Tianyong Zhang,Jinfeng Xing
Herein, a facile method combining in-situ generation of potassium oleate (KOA) and miniemulsion photopolymerization under green LED irradiation was proposed to prepare poly(methylmethacrylate) (PMMA) nanospheres . A miniemulsion containing methyl methacrylate (MMA) was prepared in situ, in which KOA as a surfactant was synthesized by the neutralization reaction of oleic acid (OA) and potassium hydroxide (KOH), and then miniemulsion photopolymerization occurred to obtain PMMA nanospheres under green LED irradiation. Emulsion stability test proved that the in-situ surfactant miniemulsion has higher stability than the preformed surfactant miniemulsion. The effect of surfactant amount and exposure time on photopolymerization was investigated. Furthermore, hexadecane (HD) and polyvinylpyrrolidone (PVP) were introduced into the polymerization system to avoid the adverse effect of Ostwald ripening and particle agglomeration respectively, and PMMA nanospheres with uniform sizes of ∼100 nm were finally prepared.
研究领域:
高分子科学
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材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiahui Li,Boxuan Peng,Siyuan Yu,Fangzheng Zhao,Qiqi Han,Shuaibing Huang,Fengmin Jin,Jinfeng Xing
With the rapid development of industry, water pollution has become one of the important problems that harm the ecological environment and human health. The extensive use and random discharge of dyes have caused serious damage to water resources. Hydrogel bead is a promising material for dye adsorption due to its advantages of rich functional groups and high specific surface area. Here, acrylic acid sodium salt (AAS) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) as monomers, N,N’-Methylene-bis-acrylamide (MBA) as crosslinking agent, sodium alginate (SA) as semi-interpenetrating network component, laponite as nano-clay additive, and single 2′,4′,5′,7′ −tetrabromofluorescein disodium salt (EY)/ Triethanolamine (TEOA)/ diphenyl iodonium hexafluorophosphate (DPI) as green light polymerization initiating system were combined to prepare composite hydrogel beads within 10 s under green LED irradiation. The composite hydrogels were characterized by infrared spectroscopy (FTIR), thermogravimetric analyzer (TG), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The addition of sodium alginate and laponite can improve the mechanical properties of hydrogel beads. In the adsorption study of malachite green, the influence of time, temperature, dye concentration, pH, ionic strength, and other factors on the adsorption effect were investigated. The adsorption process was consistent with the second-order kinetic process and Langmuir adsorption. At room temperature, the highest adsorption capacity of the hydrogel beads for malachite green reached 829.63 mg/g. The PAAS-SL hydrogel beads maintained a high adsorption effect in the pH range (3–10), and the capacity reached 575.0 mg /g at pH 3, which had a good ability to resist low pH. In the adsorption–desorption experiments, the removal rate of PAAS-SL hydrogel beads for MG is still more than 80 % after 5 cycles. Our research provides a promising strategy for the efficient and rapid preparation of hydrogel beads with excellent properties.
研究领域:
环境科学
·
材料科学
·
水处理
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）