CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Yuan Zhong,Nan Zhou,Mao Xia,Yue Zhou,Hongxi Chen,Zhi Zhou
Indoor cultivation has attracted more and more concerns in the last few years. Searching for ideal red-emitting phosphors for this application has been a great challenge. In this paper, a novel red-emitting phosphor SrAl 3 BO 7 :Mn 4+ (SABO:Mn 4+ ) had been synthesized through a modified hydrothermal reaction method for the first time. Three kinds of effect parameters, including hydrothermal reacting time, sintering temperature and Mn 4+ doping concentration, were comprehensively considered to optimize the phase purity and luminescent properties of the SABO:Mn 4+ phosphor. Besides, the luminescent properties of SABO:Mn 4+ was systematically investigated through UV–vis absorption spectra , PLE and PL spectra, CIE chromaticity coordinate and decay times. The excitation band of this phosphor locates in the wavelength range of 250–550 nm, resulting from Mn 4+ → O 2− charge transfer and electron transitions from 4 A 2 – 4 T 1 , 2 T 2 and 4 T 2 energy levels. Meanwhile, a sharp emission band is detected from 600 to 700 nm with two emission peaks located at 648 and 662 nm, which is assigned to 2 E → 4 A 2 characteristic transition of Mn 4+ . In addition, Mg 2+ /Zn 2+ /Ca 2+ are co-doped as charge compensators to improve the luminescent properties of SABO:0.03Mn 4+ . The impacts of doping concentration of Mg 2+ /Zn 2+ /Ca 2+ on the photoluminescent intensity, QE and thermal stability of SABO:0.03Mn 4+ phosphor is investigated carefully. The corresponding mechanism is discussed via decay times, EPR spectra and configurational coordinated diagram. More importantly, the EL spectrum of as-fabricated pc-LED device matches well with the absorption of plant pigments, demonstrating this novel phosphor can regard as a promising red-emitting luminescent material to meet the light requirement in plant growth LED lighting.
研究领域:
材料科学
·
光学工程
·
植物学
✓ 已验证
DOI
高影响因子
JOURNAL OF CELLULAR AND MOLECULAR MEDICINE
·
2021
·Vol. 25
·期 11
·4962-4973
·
IF 5.31
Mingyu He,Gege Yan,Yang Wang,Rui Gong,Hong Lei,Shuting Yu,Xiaoqi He,Guanghui Li,Weijie Du,Tianshuai Ma,Manqi Gao,Meixi Yu,Shenzhen Liu,Zihang Xu,Elina Idiiatullina,Naufal Zagidullin,Valentin Pavlov,Benzhi Cai,Ye Yuan,Lei Yang
Osteosarcoma (OS) is the most common primary malignant bone tumour in adolescence. Lately, light-emitting diodes (LED)-based therapy has emerged as a new promising approach for several diseases. However, it remains unknown in human OS. Here, we found that the blue LED irradiation significantly suppressed the proliferation, migration and invasion of human OS cells, while we observed blue LED irradiation increased ROS production through increased NADPH oxidase enzymes NOX2 and NOX4, as well as decreased Catalase (CAT) expression levels. Furthermore, we revealed blue LED irradiation-induced autophagy characterized by alterations in autophagy protein markers including Beclin-1, LC3-II/LC3-I and P62. Moreover, we demonstrated an enhanced autophagic flux. The blockage of autophagy displayed a remarkable attenuation of anti-tumour activities of blue LED irradiation. Next, ROS scavenger N-acetyl-L-cysteine (NAC) and NOX inhibitor diphenyleneiodonium (DPI) blocked suppression of OS cell growth, indicating that ROS accumulation might play an essential role in blue LED-induced autophagic OS cell death. Additionally, we observed blue LED irradiation decreased EGFR activation (phosphorylation), which in turn led to Beclin-1 release and subsequent autophagy activation in OS cells. Analysis of EGFR colocalization with Beclin-1 and EGFR-immunoprecipitation (IP) assay further revealed the decreased interaction of EGFR and Beclin-1 upon blue LED irradiation in OS cells. In addition, Beclin-1 down-regulation abolished the effects of blue LED irradiation on OS cells. Collectively, we concluded that blue LED irradiation exhibited anti-tumour effects on OS by triggering ROS and EGFR/Beclin-1-mediated autophagy signalling pathway, representing a potential approach for human OS treatment.
研究领域:
肿瘤学
·
细胞生物学
·
分子生物学
·
光生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Sustainability
·
2022
·
IF 7.244
S. Wei,S. Fan,M. Zhang,J. Ren,B. Jia,Y. Wang,R. Wu,Z. Fang,Q. Liang
Different from traditional dye sensitization by chemisorption in the dark, this work uses electron trapping sites and positively charged rhodamine B dye molecules to achieve electrostatic interaction under irradiation. As the irradiation time increases, the surface oxygen vacancies of Bi 2 MoO 6 as the electron trapping sites gather a large number of electrons forming negative surface, which are tightly bound to the positive rhodamine B dye molecules. In the dye-sensitized Bi 2 MoO 6 system, the electrons located on the oxygen vacancies can reduce the oxidized dyes to ground state. The newly formed ground-state dyes are photoexcited again and inject electrons into the conduction band of the Bi 2 MoO 6 to participate in photodegradation levofloxacin. Then the newly aggregated electrons on the oxygen vacancies repeat the above cycle. The formation of the cyclic path greatly reduces the recombination of electrons and holes in Bi 2 MoO 6 , which increases the efficiency of photocatalytic degradation of levofloxacin from ∼43.5% to ∼98.3% under LED irradiation for 2 h. In addition, the photodegradation pathway of levofloxacin is investigated.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Muhammad Amin Padhiar,Shaolin Zhang,Fangrong Qin,Minqiang Wang,Yongqiang Ji,Noor Zamin Khan,Nisar Muhammad,Sayed Ali Khan,Jahangeer Ahmed,Shusheng Pan
Lead-free double perovskites (DPs) in the form of two-dimensional (2D) nanosheets (NSs) have emerged as exceptional candidates compared to zero-dimensional (0D) nanocrystals (NCs). This preference is attributed to their intriguing fundamental properties and promising applications in optoelectronics. Notably, NSs offer superior performance due to their enhanced surface passivation capabilities, facilitating more efficient treatment of surface defects and thereby enhancing optoelectronic properties. However, the realization of Cs 2 NaInCl 6 as lead-free DPs NSs is yet to be achieved. In this study, we successfully synthesized Cs 2 NaInCl 6 co-doped with Bi 3+ /Mn 2+ NSs. The two-step solution process synthesis enables us to achieve dimensionality control, progressing from 0D NCs to 2D NSs. Comprehensive optical spectroscopy analyses reveal that the NSs exhibit a suppressed non-radiative decay rate ( Knr ) of 5.03 × 10 −3 ns −1 in contrast to NCs with a Knr of 3.21 × 10 −2 ns −1 . This observation is indicative of a well-passivated surface in NSs. In contrast, NSs with identical composition and surface morphology significantly enhance the photoluminescence quantum yields (PLQYs) up to 73%, which represents the highest PLQYs recorded in Cs 2 NaInCl 6 DPs to the best of our knowledge. Beyond fundamental investigations, the study explores the practical applications of these NSs as anti-counterfeit marks created on a flexible substrate, demonstrating robust emission under UV light. Additionally, the fabrication and testing of a light-emitting diode (LED) showcase the versatility of these NSs in optoelectronic devices. This comprehensive exploration of the optical, morphological, and application aspects of Cs₂NaInCl₆ doped with Bi³⁺/Mn 2 ⁺ NSs contributes valuable insights to the evolving landscape of lead-free perovskite materials, highlighting their potential for diverse technological applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 47
·34606-34610
·
IF 3.9
Jianfeng Qiu,Yanping Liu,Minxian Cao,Luqi Xie,Yongkun Liu,Hongwen Li,Junqiang Lu,Qifeng Liang,Jiaqi Pan,Chaorong Li
The MoS2/MoO3 nano-heterojunction photocatalyst was synthesized via the in situ oxidation sintering method. The properties of the samples were characterized by XRD, SEM, EDX, TEM, UV-vis, PL, FT-IR, BET and electrochemical techniques. The MoS2/MoO3 nano-heterojunction (MS-400) exhibited significantly better photocatalytic activity toward Rhodamine B degradation (0.42634 h−1) than monomer MoS2 (∼8.0-folds) and MoO3 (∼25.6-folds). This is mainly attributed to the MoS2/MoO3 heterojunction interface having an appropriate potential gradient that can promote the interface carrier transportation/separation to optimize the carrier efficiency and increase the solar absorption and specific surface areas/active sites via microstructures.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 5
·1-10
·
IF 2.8
Ye Huihua,Lin Jinfeng,Wang Xusheng
Three types of CaAl 2 O 4 :Li + phosphors singly doped with Eu 3+ , Sm 3+ , and Ho 3+ ions were synthesized using high temperature solid-state reaction method, and the effects of rare-earth ions and doping concentration on the crystal structure, thermal stability and luminescence properties were systematically studied. The XRD patterns show that all Ca 1 − x Al 2 O 4 :0.01Li + , x Re 3+ (Re = Eu, Sm, Ho) phosphors are pure monoclinic CaAl 2 O 4 phase. And these phosphors can be effectively excited by the characteristic excitation wavelength of the corresponding rare earth ions. Notably, when the doping concentration is less than 15 mol%, the corresponding luminous intensity increases monotonically with the increase of Ho 3+ , while the optimal doping amounts for Eu 3+ and Sm 3+ are 9 mol% and 1 mol%, respectively. Additionally, comparative analysis revealed superior energy transfer efficiency from the matrix to the luminescent center in the CaAl 2 O 4 :0.01Li + , Eu 3+ relative to Sm 3+ and Ho 3+ counterparts. More importantly, the Ca 0.91 Al 2 O 4 :0.01Li + , 0.09Eu 3+ phosphors also exhibit excellent thermal and ageing stability. Its luminous intensity exhibited minimal deviation (< 16%) across an extended temperature range (208 ~ 448 K). Furthermore, after 320 h of thermal aging at 100 °C, the sample retained over 98% of its initial fluorescence intensity. This study provides theoretical and experimental basis for the development of CaAl 2 O 4 -based phosphors for solid-state lighting devices.
研究领域:
材料科学
·
光电子学
·
固态照明
·
无机化学
·
应用物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 8
·2873-2881
·
IF 7.393
Dan Li,Yixuan Liu,Shuangshuang Shi,Yanjun Li,Chong Geng,Shu Xu
Lead halide perovskite nanocrystals (PNCs) are emerging as promising light-conversion materials for light-emitting diode (LED) display applications. However, the practical application of PNCs is hindered by their labile surface and dynamic ionic ligand binding. Here, we report a post-synthetic surface passivation strategy to stabilize the CsPbBr3 PNCs by zinc methacrylate (ZnMA) and trioctylphosphine oxide (TOPO) co-passivation. Surface analyses reveal that the ZnMA stabilizes the PNCs by replacing the surface ammonium ligands, and TOPO further coordinates to the ZnMA to provide a high photoluminescence quantum yield (PLQY) of the PNCs. Moreover, the ZnMA capping on the PNC surface could participate in the polymerization of MMA to form a crosslinked polymer shell around the PNCs. The resultant PNCs–PMMA film presents a PLQY of 74% and maintains a constant PL intensity under continuous UV irradiation in air, while the PNCs–PMMA film made of classical PNCs quickly degrades. The prepared PNCs–PMMA film was tested as the light down-conversion layer in LED backlighting and presented photostability comparable to classical CdSe/ZnS NCs–PMMA under continuous illumination. This surface passivation strategy avoids the use of ionic ligands for the surface passivation of PNCs in polymer matrices, and we expect related surface chemistry to promote the performance enhancement of diverse PNCs–polymer composites for LEDs and other optoelectronic applications.
研究领域:
材料科学
·
纳米技术
·
光电
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Zhuangzhuang Chu,Yechang Feng,Bingqing Xie,Yu Yang,Yang Hu,Xiaohua Zhou,Teng Yuan,Zhuohong Yang
Materials with high bio-content have gradually replaced petroleum-based materials due to their sustainability, low cost, low toxicity and excellent performance in the field of UV-LED curable coatings. A novel tung oil-based methacrylate (TDMM) with low viscosity and multiple photopolymerizable methacrylates was designed and synthesized through three steps containing amidation, thiol-ene click reaction and esterification. The reaction conditions for thiol-ene click reaction were optimized by calculating double bond conversion and degree of functionalization of polyols. The chemical structures of the as-prepared TDMM were characterized by 1 H NMR and FTIR. The rheological behavior analysis indicated that TDMM exhibited lower viscosity than petrochemical-based reactive diluent pentaerythritol triacrylate (PETA). Subsequently, TDMM showed good copolymerization ability with soybean oil-based reactive monomer (AESO) under the “green + green” UV-LED curable systems with high bio-content (61–81% in theory). The TDMM/AESO systems showed higher T g but lower thermal stability, better modulus and tensile strength than the neat AESO. Besides, the UV-LED cured coatings exhibited excellent physical and chemical properties. This bio-renewable tung oil-based monomer is shown to be an effective reactive diluent and considered to have good potential in the development of the UV-LED curable coatings.
研究领域:
材料科学
·
绿色化学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Feifei Li,Lin Zhou,Ziqi Zhang,Mengmeng Li,Lin Lei
A facial white light-emitting diode (LED) induced reversible deactivation radical polymerization (RDRP) of methacrylate monomers was successfully conducted by using sub-ppm-level organic dyes as organocatalysts. The organic dyes contained Eosin B (EB), Rose bengal (RB), Eosin Y (EY) and 3,3,5,5-Tetraiodophenolsulfonphthalein (TIPS) with the merits of metal free, non-toxic and inexpensive. The resulted poly (methacrylate) with controlled molecular weights and polydispersity indices were obtained either under white LED irradiation or green and blue LED. The polymerization of various functional methacrylates demonstrated that this polymerization system with dyes as organocatalysts had high monomer versatility. Chain extensions copolymerization verified the living features of reversible deactivation radical polymerization.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ting Fan,Jian-tao Lü,Wen-qiang Deng,Jun-xian Mai,Jie Liang,Ting-ting Deng,Wen Fan,Qin-song Zhou,Qi-feng Lin
Water-soluble Mn 2+ doped CsPbCl 3 nanocrystals coating by 6-aminocaproic acid (ACA) ligand were prepared by a simple ligand assisted reprecipitation method at room temperature. The CsPbCl 3 :Mn 2+ /ACA nanocrystals were almost cubic phase and had mean size of about 10 nm. Due to the coating and passivation of ACA, the CsPbCl 3 :Mn 2+ /ACA nanocrystals retained the initial fluorescence intensity of 20% after being dispersed in deionized water for 20 days. The orange LED device based on CsPbCl 3 :Mn 2+ /ACA nanocrystals were prepared with excellent luminescence properties. In the cytotoxicity test, even if the MCF-7 cells were cultured for 24 h at the concentration of CsPbCl 3 :Mn 2+ /ACA nanocrystals as high as 160 μg·ml −1 , the cell survival rate was still 70%. Confocal fluorescent cell imaging results showed that the nanocrystals had remarkable fluorescent cell imaging effect even after 24 h. The synthesized CsPbCl 3 :Mn 2+ /ACA nanocrystals have nice water solubility, good water stability, low cytotoxicity and highly luminescence properties, and have great application potential in the field of orange LED and fluorescent probes .
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chi Zhang,Yi Li,Jie Li
Waterborne human viruses, with ubiquitous prevalence in aquatic environments, extremely low infectious doses, and high resistance to common disinfection processes, pose a substantial threat to human health. Herein, for the first time, a photocatalytic membrane reactor (PMR) driven by visible light emitting diodes (Vis-LEDs) was applied for effective water disinfection of human adenoviruses. The photocatalyst used in the PMR was selected to be a metal-free heterojunction (named as CNO) with the advantages of visible-light-response, efficient virucidal effects, green properties and easy recovery via microfiltration. The disinfection performance of the Vis-LED PMR towards human adenoviruses was improved by adjusting operation with response surface methodology (RSM). Based on twenty sets of operating data, a semi-empirical model was established with a high accuracy of R 2 = 0.9622 for predicting the final adenovirus inactivation after 300-min operation. The optimal operating solution was found to be 5.00-log MPN/mL, 320.30 mg/L and 502.65 min for initial virus concentration (IVC), photocatalyst loading (PL) and hydraulic retention time (HRT), respectively. Under the optimized operation, all human adenoviruses were completely inactivated without regrowth, accompanied by severe damage to capsids, within 600 min in the Vis-LED PMR. In addition, the CNO photocatalyst could be retained inside the reactor via low-energy microfiltration with excellent recovery (99.9 wt%) but without obvious chemical or structural changes. Our work can offer a simple, effective, economical and eco-friendly water disinfection device against resistant pathogenic microbes, with controllable efficiency by facilely varying operating solutions.
研究领域:
环境科学
·
公共卫生
·
生物工程
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Nan Zhou,Peixing Gao,Yimei Yang,Yuan Zhong,Mao Xia,Ye Zhang,Yun Tian,Xiangyang Lu,Zhi Zhou
In this paper, a series of novel orange-red emission phosphors Sr 8 ZnY(PO 4 ) 7 :Sm 3+ (SZYP:Sm 3+ ) were synthesized by high-temperature solid-state reaction. The photoluminescence and concentration-dependent properties of this phosphor were investigated carefully through diffuse reflection spectra, excitation and emission spectra, Commission Internationale de l'Éclairage (CIE) chromaticity coordinate and decay times. SZYP:Sm 3+ could be efficiently excited by n-UV and blue lights which center at 318, 345, 363, 376, 401, 410, 440 and 475 nm, respectively. The characteristic orange-red emission peaking at 563, 601 and 647 nm had been detected, which should be attributed to the characteristic f – f forbidden transition of Sm 3+ . The internal quantum efficiency (IQE) of ideal phosphor of SZYP:0.09Sm 3+ reached as high as 47%. In addition, The concentration quenching mechanism and thermal stability of SZYP:Sm 3+ were further investigated. It was found SZYP:Sm 3+ can maintain 93% of initial emission intensity at 150 °C and the corresponding activation energy was calculated to be 0.26 eV based on Arrhenius formula. The emission intensity of 1.0Mg 2+ and 0.02Al 3+ incorporated SZYP:0.09Sm 3+ reached up to 134% and 117% of the initial value, respectively. Moreover, (light-emitting diodes) LED devices were fabricated by employing the optimized samples as orange-red component with 365 nm n-UV chips. The desired emission in plant absorption region and extremely high thermal stability imply that SZYP:Sm 3+ is suitable for the application in plant growth LED lighting.
研究领域:
材料科学
·
光学工程
·
固体化学
·
光电子学
·
农业照明技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）