FOOD RESEARCH INTERNATIONAL
·
2021
·
IF 6.475
Qiandai Shi,Jing Jing Wang,Lu Chen,Zhiyun Peng,Qiao-Hui Zeng,Yongheng Zhu,Yong Zhao
Photodynamic inactivation (PDI) is an effective alternative to traditional antibiotics to broadly kill bacteria. This study aimed to develop a potent PDI system by coupling calcinated melamine sponges (CMSs) with the Fenton reaction. The results showed that CMS calcined at 350 ℃ was successfully carbonized with intact and porous structures, and it possessed excellent hydrophilicity and photothermal conversion performance. When Fe 2+ was added and internalized, the Fenton reaction in which Fe 2+ reacted with H 2 O 2 in cells occurred to produce reactive oxygen species (ROS) ( OH, OOH, etc.) and O 2 , and notably, the O 2 molecules could serve as a raw material to absorb the photothermal energy of CMS to generate highly reactive 1 O 2 . Under synergistic effects, CMS-350 coupled with Fe 2+ potently inactivated > 6 Log CFU/mL (>99.9999%) of Salmonella under 201.6 J/cm 2 blue LED illumination by destroying Na + /K + -ATPase and Ca 2+ /Mg 2+ -ATPase, DNA synthesis-related enzymes, cell membranes, etc. Meanwhile, the composite photocatalyst was proven to be nontoxic and could inactivate Salmonella in various foods, including vegetables ( Brassica chinensis L), eggs and fresh cucumber juice. As a result, CMS coupled with the Fenton reaction greatly improves the inactivation potency of PDI against harmful bacteria.
研究领域:
生物技术
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微生物学
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 14
·期 1
·46
·
IF 5.3
Xiangyan Yun,Jingheng Nie,Hanlin Hu,Haizhe Zhong,Denghui Xu,Yumeng Shi,Henan Li
Organic–inorganic hybrid halides and their analogs that exhibit efficient broadband emission from self-trapped excitons (STEs) offers an unique pathway towards realization of highly efficient white light sources for lighting applications. An appropriate dilution of ns2ions into a halide host is essential to produce auxiliary emissions. However, the realization of ns2cation-based halides phosphor that can be excited by blue light-emitting diode (LED) is still rarely reported. In this study, a zero-dimensional Te-based single crystal (C8H20N)2TeCl6was synthesized, which exhibits a yellow-orange emission centered at 600 nm with a full width at half maximum of 130 nm upon excitation under 437 nm. Intense electron–phonon coupling was confirmed in the (C8H20N)2TeCl6single crystal and the light emitting mechanism is comprehensively discussed. The results of this study are pertinent to the emissive mechanism of Te-based hybrid halides and can facilitate discovery of unidentified metal halides with broadband excitation features.
研究领域:
材料科学
·
光电
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xin Xie,Wanyin Ge,Ye Tian,Qian Zhang,Maohao Yang,Chenge Wu,Peng He,Honglei Yin
To develop continuous broadband emission near-infrared (NIR) phosphors compatible with blue LED chips, numerous Cr 3+ -Yb 3+ co-doped phosphors have been synthesized. However, the emission spectra of Cr 3+ vary significantly across different matrix materials, while Yb 3+ maintains a relatively stable emission spectrum. This variation leads to notable luminescence depressions between 850 and 900 nm in many Cr 3+ -Yb 3+ co-doped phosphors. To address this emission spectrum gap, we utilized Cr 3+ as a sensitizer and introduced Nd 3+ as the luminescence center within the La 3 Sc 2 Ga 3 O 12 matrix material, establishing a Cr 3+ -Nd 3+ energy transfer channel. Under 480 nm excitation, we tuned emission peaks at 800 nm (Cr 3+ ) and 881 nm (Nd 3+ ). The stable NIR emission of Nd 3+ effectively compensates for the missing spectrum in Cr 3+ -Yb 3+ co-doping. The Cr 3+ -Nd 3+ energy transfer process was thoroughly analyzed using diffuse reflection spectrum, excitation spectrum, and fluorescence decay curves. The LSGO:0.125Cr 3+ , 0.03Nd 3+ compound with the best optical performance was packaged with a 480 nm LED chip to create a NIR light source. At a working current of 10 mA, it achieved a photoelectric conversion efficiency of 9.45 %, demonstrating its potential for applications in non-destructive detection and luminescence thermometry. This work presents a novel strategy for tuning NIR spectral distribution and developing continuous broadband NIR phosphors.
研究领域:
材料科学
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光学
·
光子学
·
光谱学
✓ 已验证
DOI
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2023
·
IF 7
Ruiyu Zhu,Weilun Wang,Zisheng Luo,Haiyan Lin,Yong Li,Weiqiang Lu,Zimu Xu,Chenggang Cai,Shuheng Hu
Blue light-emitting diode (LED) light has been considered to influence the growth, quality, and preservation of certain fruit and vegetable. However, the blue LED light impact on apple postharvest blue mold remains elusive. In this study, the influence of blue LED light on Penicillium expansum virulence and patulin secretion was investigated in vitro and in vivo, as well as on the apple quality. The growth of P. expansum was inhibited by blue LED light via changes in mycelium morphology changes, cell membrane integrity, and potential mitochondrial membrane destruction, thereby causing reactive oxygen species accumulation, oxidative stress , and mitochondrial dysfunction. Furthermore, the expression level of LaeA relevant to the pathogenicity of P. expansum , was down-regulated. Specifically, the patulin production of P. expansum was inhibited via expression down-regulation of the patulin biosynthesis-related genes PatA , PatE , and PatN rather than direct degradation by the blue LED light treatment. Additionally, no significant effects on the fruit quality were observed when the light intensity was lower than 120 μmol m -2 s -1 . In summary, blue LED light treatment has the potential for a low-cost, safe, and non-chemical approach to control apple postharvest decay.
研究领域:
食品科学
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微生物学
·
植物病理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Bufan Yu,Xingxing Duan,Zhaohui Xing,Jiacheng Liu,Yutong Pan,Lei Wang,Jiangshan Chen,Dongge Ma
Quasi-2D perovskites are emerging as promising materials for light-emitting applications due to their pronounced quantum confinement effects. Blue perovskite light-emitting diodes (PeLEDs) remain fundamentally challenging yet critically demanded for display applications. Current strategies employing quasi-2D perovskites face inherent trade-offs: 1) increased spacer cation content enhances quantum confinement for blueshift but deteriorates charge transport through insulating organic layers; 2) multiphase quantum well formation broadens emission spectra (fwhm >25 nm), compromising color purity; 3) chloride incorporation for bandgap widening induces deep-level traps and accelerates halide segregation under operational voltage. Herein, we address these intertwined challenges through multifunctional additive engineering using phenylbiguanide (PBG). The conjugated molecular structure with dual −NH2/═NH groups enables 3-fold functionality: First, strong Pb–PBG coordination effectively passivates uncoordinated halide vacancies, suppressing nonradiative recombination and achieving a high photoluminescence quantum yield (PLQY) of 76.6%. Second, hydrogen-bonding networks between PBG and [PbX6]4– frameworks immobilize halide ions, inhibiting electric-field-driven Cl/Br phase segregation. Third, PBG modulates crystallization kinetics to produce a narrow quantum well distribution for narrow emission (fwhm = 21 nm) at 472 nm and efficient Förster resonance energy transfer. The synergistic effects yield pure-blue PeLEDs with an impressive EQE of 9.32% at 472 nm, with stable emission and a 10-fold enhancement of lifetime compared to the pristine device without PBG. This work offers a promising approach to the development of high-performance blue PeLEDs using quasi-2D perovskites.
研究领域:
材料科学
·
光电子学
·
半导体器件
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发光二极管
·
钙钛矿材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Huajian Ou,Lu Chen,Qiaohui Zeng,Zhiyun Peng,Zihao Lin,Ping Qi,Konglong Feng,Jing Jing Wang
A 5-aminolevulinic acid (ALA)-grafted chitin film (O-CT/ALA film) with a photodynamic inactivation (PDI) against bacteria was previously fabricated, and its preservation efficiency and mechanisms against salmon were explored. Results showed that the PDI-mediated O-CT/ALA film exhibited sustained generation capability of ROS, which had potent antibacterial activity in vitro under blue LED irradiation. Moreover, this film significantly inactivated the native bacteria and suppressed their growth in salmon fillets during storage at 4 °C and 25 °C, extending the shelf-life by >2 days compared to commercial polyethylene film. Consequently, the O-CT/ALA film retained the textural integrity of salmon muscle, stabilized the physicochemical properties of pH value, electrical conductivity, color appearance, and reduced the level of protein and lipid oxidation. Notably, it obviously reduced the accumulation of microbial metabolites and oxidation-related volatile compounds in salmon. Therefore, the PDI-mediated film shows a valid ability in preserving the storage quality of aquatic products.
研究领域:
食品保鲜
·
食品科学
·
抗菌技术
·
高分子科学
·
光动力疗法
·
水产品贮藏
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Jinning Wang,Qiufeng Shi,Konstantin V. Ivanovskikh,Lei Wang,Jianwei Qiao,Haijie Guo,Ping Huang
A series of Mn 4+ -doped NaSr 10 Y 5 W 4 O 30 (NSYWO) phosphors have been successfully synthesized and further characterized to estimate their potentials for application as a far-red emitting component of pc-LED. An XRD analysis and crystal structure refinement have been carried out to characterize its quality. The doping concentration and temperature (80–500 K) dependent luminescence properties as well as decay kinetics have been studied and analyzed. It has been found that Mn 4+ substitutes for W 6+ sites resulting in far-red emission at 688 nm. The temperature quenching is attributed to thermal activation of an electron from Mn 4+ 2 E g to 4 A 2g state via crossover, yielding an activation energy of 0.35 eV. Furthermore, to assess practical application of the novel phosphor, a blue-emitting LED chip combined with NSYWO: 0.8 mol% Mn 4+ has been packaged. The light from both the blue-emitting LED chip and NSYWO: Mn 4+ phosphor was shown to be effectively utilized, revealing a good promise for application of the phosphor in the field of plant growth lighting.
研究领域:
材料科学
·
光电
·
植物生物学
·
光子学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Xiaoya Li,Shirong Sun,Qian Zhang,Weidong Wu,Yingchun Liu,Liheng Chen,Xueqing Qiu
This work explores the potential of porphyrin-grafted lignin nanoparticles (TCPP- g -AL-NPs) as a novel, effective, and biocompatible photosensitizer for antibacterial applications. Lignin acted as a sustainable framework, enhancing water-compatibility and single oxygen ( 1 O 2 ) generation of porphyrin. The mechanism study revealed the successful formation of a p-n heterojunction between lignin and porphyrin, which promoted the charge separation and the photocatalytic process of O 2 to 1 O 2 . In vitro antibacterial assessments demonstrated the efficacy of TCPP- g -AL-NPs in eradicating both Gram-negative ( E. coli ) and Gram-positive ( S. aureus ) bacteria under blue LED light irradiation. The observed lower antibacterial effectiveness against E. coli compared to S. aureus could be attributed to the thicker cell membrane of Gram-negative bacteria. Additionally, TCPP- g -AL-NPs exhibited no cytotoxicity towards mouse fibroblast cells (L929). This study presents a straightforward and promising approach for developing lignin-based photosensitizers for photodynamic therapy.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
光催化
·
抗菌研究
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2020
·Vol. 11
·期 47
·7497-7505
·
IF 5.342
Jiannan Cheng,Kai Tu,Enjie He,Jinying Wang,Lifen Zhang,Zhenping Cheng,Xiulin Zhu
A new photocontrolled iodine-mediated reversible-deactivation radical polymerization (RDRP) strategy to facilely prepare main-chain-type semifluorinated alternating block copolymers was successfully established under irradiation with blue LED light at room temperature, by using a semifluorinated alternating copolymer ((AB)n, where A represents α,ω-diiodoperfluoroalkane and B represents α,ω-unconjugated diene) as a macroinitiator and chain-transfer agent, and methacrylates, acrylates and styrene as the monomers. The end group of (AB)n terminated with perfluoroalkyl iodide –(CF2)n–I can be activated by Ru(bpy)3Cl2/AsAc-Na reducing quenching catalytic cycle which generates initial carbon centered radicals (–(CF2)n˙) to initiate the polymerization under blue LED light irradiation. The polymerization can reach a reversible equilibrium through effective oxygen–iodine halogen bonding in acetone and undergo a photocontrolled iodine-mediated RDRP process. In addition, the “living” features of this photocontrolled iodine-mediated RDRP system were confirmed by polymerization kinetics and controlled “on–off” light switching cycle regulation. What's more, different types of fluoropolymers can be introduced on the copolymer chains due to the powerful designability of (AB)n. Therefore, this strategy can provide a facile and highly efficient approach to the precision synthesis of main-chain-type semifluorinated alternating di/triblock polymers under visible light irradiation.
研究领域:
高分子化学
·
材料科学
·
光化学
·
有机化学
✓ 已验证
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2013
·
IF 1.687
Yan-Jing Gu,Bing Yan
The synthesis of organics 9-hydroxyphenalenone (HPO), 2-methyl-9-hydroxyphenalenone (MHPO), 6-hydroxybenz[de]anthracen-7-one (HBAO), 5-amino-1,10-phenanthroline (phen-NH 2 ) and its functionalized mesoporous MCM-41 by covalent band are reported, as well as those of Europium (III) hybrid mesoporous materials, EuL 3 phen-MCM-41 (L = HPO, MHPO, HBAO). The photoluminescence and microstructural properties are characterized, and the XRD and BET results revealed that all of these hybrid materials have uniformity in the mesostructure. It is worth noting that the excitation spectra of these hybrid materials have a broad absorption, which occupies from UV to visible region (250–475 nm). Upon ligand-mediated excitation with the visible light, the low efficient energy transfer exhibit between the organic ligands and europium(III) ion under visible excitation, but the maximum wavelength (456 nm/457 nm/451 nm) located at blue light region, which is in consistent with the blue LED light, then might be a feasible alternative in producing time-resolved luminescence under LED-excitation.
研究领域:
材料科学
·
化学
·
光电技术
✓ 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）