CHEMICAL PHYSICS
·
2024
·
IF 2
Qian Du,Yu-Guo Yang,Xiao-Na Shen,Yuan-Yuan Zhang,Shen-Ao Hu,Bing Liu,Qing-Gang Li,Xian-Shun Lv,Hua-Jian Yu,Lei Wei,Cheng-Cheng Qiu,Jing-Feng Li,Rui Zhang,Xu-Ping Wang
Sr(La, Y)Ga 3 O 7 : Mn 4+ phosphors were prepared by sintering at 1400 ℃. The structural characteristics of phosphors were analyzed by means of XRD measurements. Surface compositions and chemical state of the elements were gained from XPS measurements. And the vibration and rotation information of the molecular structure was detected in Raman spectra. The phosphors show characteristic excitation spectrum of Mn 4+ , which puts down to the electronic transition of 4 A 2g → 4 T 1g and 4 A 2g → 4 T 2g . Exciting at 380 nm, the phosphors emit deep red light resulting from the 2 E g → 4 A 2g transition. The Y 3+ substitution influences crystal structure and photoluminescence performance obviously. The incorporation of a small amount of Y 3+ reduces the cell volume and induces impurity phase of Y 3 Ga 5 O 12 in all prepared phosphors. The band peaking at 715 nm decreases highly and the band becomes stronger when x ≥ 0.4.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Weiwei Li,Haijun Huang,Bingchu Mei,Jinghong Song,Xiaodong Xu
This study aims to investigate the role of Y 3+ ion on microstructure, optical transmittance, and thermal properties of CaF 2 transparent ceramics. Series of nanosized CaF 2 powders doped with different concentration of Y 3+ ion were synthesized by direct precipitation method. XRD , FSEM and TEM results demonstrated that the CaF 2 nanoparticles could be tuned in size through doping of Y 3+ ion. Corresponding CaF 2 transparent ceramics were fabricated by hot-pressed (HP) method. Compared with the undoped CaF 2 sample, the transmittance of the CaF 2 ceramics improved dramatically after doping with Y 3+ ions and reached above 80% at the wavelength of 1200 nm. The effects of Y 3+ ion on the microstructure and thermal properties of CaF 2 transparent ceramics were also investigated. Overall consideration of the transmittance and thermal properties of the samples, the optimal concentration of Y 3+ ion was about 1 at.%.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
BIOLOGICAL CONTROL
·
2022
·
IF 3.857
Meilin Wei,Solairaj Dhanasekaran,Guillaume Legrand Ngolong Ngea,Esa Abiso Godana,Xiaoyun Zhang,Qiya Yang,Xiangfeng Zheng,Hongyin Zhang
Ochratoxin A (OTA), a widespread mycotoxin contaminant in food and feed, threatens human and animal safety and causes significant economic losses. The aims of the present study were to investigate the elimination properties of Cryptococcus podzolicus Y3 on OTA and its co-degradation efficiency on citrinin (CIT) and OTA. C . podzolicus Y3 eliminated 100% OTA (1 μg/mL) in the PM media within 5 d and in grape juice media within 3 d by intracellular substances. The results of HPLC-FLD and LC-MS showed that OTA was efficiently eliminated into non-toxic ochratoxin α (OTα). The substances responsible for OTA degradation were thermostable and worked effectively at 4 °C and 28 °C, and intracellular proteins were participated in the elimination of OTA. In addition, the results showed that C. podzolicus Y3 degraded OTA and CIT together in NYDB media, although the degradation efficiency was lower than single mycotoxin degradation. Generally, our study highlighted that C. podzolicus Y3 could be a potential strain to eliminate OTA and CIT to secure food products and enhance food safety.
研究领域:
食品科学
·
毒理学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2018
·
IF 0
Canzheng Liu,Jinhuan Yao,Zhengguang Zou,Yanwei Li,Guozhong Cao
Hydrated V 2 O 5 has attracted considerable attention for sodium ion batteries (SIBs) due to its high theoretical capacity. However, the poor cycling performance caused by structural instability during sodiaton/desodiation greatly hampers its application. Herein, Y 3+ pre-intercalated hydrated V 2 O 5 samples (Y x V 2 O 5 , x = 0.0, 0.02 and 0.06) are synthesized by a facile sol-gel and freeze-drying routes followed by heat treatment in air at 200 °C. It is found that the morphology, oxidation state of vanadium, and sodium storage performance of hydrated V 2 O 5 could be largely modulated by Y 3+ pre-intercalation. As cathode material for SIBs, the Y 0·02 V 2 O 5 sample exhibits much enhanced cycling stability, higher Na + diffusion coefficient , lower electrochemical reaction resistance, and improved rate capability compared to the pure V 2 O 5 counterpart. First-principle calculations reveals that the pre-intercalated Y 3+ forms [YO 6 ] pillar with two oxygen atoms from the VO 5 pyramids and four oxygen atoms from the intercalated water molecules, which firmly binds the V 2 O 5 double layers together. Ex-situ XRD , SEM, and TEM analysis demonstrate that Y 3+ pre-intercalation effectively strengthens the structural integrity, stabilizes the layered structure, and suppress the irreversible phase transition of hydrated V 2 O 5 during repeated discharge/charge cycling, and therefore leading to enhanced cycling stability and improved rate capability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Junshan Hu,Daobin Zhu,Keyu Guo,Bin Duan,Yuxiang Wu,Yongqiang Li,Fengyi Wang,Wei Jin,Changchun Ding
The KYb(MoO 4 ) 2 : Er 3+ , Y 3+ phosphors were synthesized by high temperature solid state reaction method. By further doping Y 3+ ions, the near-infrared (NIR, 804 nm, 4 I 9/2 → 4 I 15/2 ) luminescence of KYb(MoO 4 ) 2 : 0.1 % Er 3+ phosphor is greatly enhanced. Based on the upconversion luminescence (UCL) spectra, the optimal doping concentration of Y 3+ ions were 7.5 %. Its near-infrared UCL intensity is about 26.9 times that of undoped Y 3+ ions. Through a series of characterization methods, we find that the enhancement of NIR upconversion emission is due to the generation of defect bands. It plays a crucial role in facilitating the transfer of energy from green light level ( 2 H 11/2 , 4 S 3/2 ) to red light level ( 4 F 9/2 ) and near-infrared level. To explain the luminescence mechanism, the power dependence, UV-VI-NIR absorption spectra , excitation spectra at 804 nm and emission spectra at 380 nm were studied. In addition, the 804 nm single near-infrared UCL intensity of KYb (MoO 4 ) 2 : Er 3+ , Y 3+ shows a linear variation with temperature in the temperature range of 298 K–673 K. The maximum sensitivity is 0.13 % K −1 . This study provides a new method and theoretical support for the application of near-infrared UCL in optical temperature measurement.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Xingxing Peng,Tianyu Li,Qihang Zheng,Yingyuan Lu,Yuzhe He,Yetao Tang,Rongliang Qiu
Hexabromocyclododecane (HBCD) is a typical persistent organic pollutant that is widely detected in the environment. Despite the significant efforts put into its mineralisation , there is still a lack of microorganism resources that can completely mineralise HBCD. Stable isotope analysis revealed that the Citrobacter sp . Y3 can use [ 13 C]HBCD as its sole carbon source and degrade or even mineralise it into 13 CO 2 , with a maximum conversion rate of 100% in approximately 14 days. Strain Y3 could completely mineralise HBCD, which it used as its only carbon source, and six debromination enzymes related to HBCD degradation were found in Y3, including haloalkane dehalogenase (DhaA), haloacid dehalogenase (HAD), etc. A functional gene named HBCD-hd-1 , encoding a HAD, was found to be upregulated during HBCD degradation and heterologously expressed in Escherichia coli . Recombinant E. coli with the HBCD-hd-1 gene transformed the typical intermediate 4-bromobutyric acid to 4-hydroxybutanoic acid and showed excellent degradation performance on HBCD, accompanied by nearly 100% bromine (Br) ion generation. The expression of HBCD-hd-1 in Y3 rapidly accelerated the biodegradation of HBCD. With HBCD as its sole carbon source, strain Y3 could potentially degrade HBCD, especially in a low-nutrient environment.
研究领域:
环境科学
·
微生物学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Feihong Yang,Weiwei Li,Peng Luo,Jing Cheng,Laiming Chen
Transparent Yb:CaF 2 ceramics have recently emerged as a promising ultra-fast laser medium with broad emission bandwidth, long lifetime and suitable thermal properties. However, Yb 3+ clustering in the CaF 2 host strongly influences the performance of these materials as solid-state laser gain media, and mitigating this clustering remains a challenge. Herein, we introduced Y 3+ and Gd 3+ buffer ions simultaneously for the first time to modulate the fluorescence properties of transparent Yb:CaF 2 ceramics and explore the effect of Y 3+ and Gd 3+ ions co-doping on the optical quality and microstructure of the ceramics. It was found that transmittance in the short wavelength was improved and fluorescence properties could be modulated to a larger extent compared to single buffer ion doping. This finding establishes the correlation between the double buffer ions doping and the fluorescence properties in transparent Yb:CaF 2 ceramics, and may lead to innovative techniques of transmitting enhancement, as well as its ultrafast laser applications.
研究领域:
材料科学
·
光学材料
·
固体激光器
·
陶瓷材料
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Chao Hu,Lan Luo,Rui Guo,Ziying Ma,Ye Liu
Mn 4+ -active far-red emitting garnet phosphors are attractive in plant cultivation for chemical/physical stability and emission band well matching with the phytochrome absorption. (La 1-x Y x ) 3 Li 5 Sb 2 O 12 : Mn 4+ (x = 0∼0.4) garnet phosphors were fabricated by solid-state reaction in this work. The powder could exhibit far-red emission centered around 717 nm (related to Mn 4+ 2 E g → 4 A 2g transition), with the highest luminescence quantum efficiency ( QE ) and thermal quenching temperature ( T 0 . 5 ) reaching 38.03 % and 520 K, respectively. Comparing with La 3 Li 5 Sb 2 O 12 :Mn 4+ , the properties have been improved significantly, with double in QE and 20 K higher in T 0.5 . Y 3+ cation substitution would lead a stronger crystal field (verified by D q /B calculation) and a less spin-orbit coupling (verified by EPR spectra), and result in a smaller energy splitting and centroid shifting in 2 E g level. Then the luminescent efficiency and thermal stability would be improved a lot. The work not only provides a new far-red-emitting phosphor but also offers a strategy for Mn 4+ -active luminescence material improvement.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 26
·14180-14187
·
IF 6.895
Luyan Wu,Jie Hu,Qilin Zou,Yaling Lin,Decai Huang,Dejian Chen,Hongyu Lu,Haomiao Zhu
Persistent luminescence nanophosphors (PLNPs) emitting in the second near-infrared window (1000–1700 nm, NIR-II) are emerging as one promising class of in vivo bio-imaging agents due to their unique advantages including non-autofluorescence and low optical scattering in tissues. Currently, it remains a great challenge to synthesize nanosized lanthanide-doped inorganic NIR-II phosphors with a good persistent luminescence performance. Herein, we present a salt microemulsion method for synthesizing Ce3+, Cr3+, Nd3+ codoped Y3(Al/Ga)5O12 nanocrystals, which generate multi-wavelength persistent luminescence in the visible (∼508 nm, 5d1 → 4f of Ce3+), the first near-infrared window (∼890 nm, 4F3/2 → 4I9/2 of Nd3+) and NIR-II (∼1063 nm, 4F3/2 → 4I11/2 of Nd3+) regions. Under illumination of a 410 nm diode (3 W) for 10 min, the observed duration time of NIR-II persistent luminescence is as long as 60 min at room temperature. Moreover, the persistent luminescence can be excited efficiently by multiple excitation sources including a blue diode, white LEDs and an X-ray generator, which is crucial for deep tissue imaging applications. By comparing the penetration depth between NIR-I and NIR-II persistent luminescence through chicken breast, we prove that NIR-II photons exhibit a deeper optical penetration length (3.9 mm) than that of the NIR-I ones (2.5 mm). In addition, the NIR signals can still be detected 3 min after ceasing the excitation source by a small animal imaging system (InGaAs detector) when the thickness of the covering chicken breast is 20 mm. These results show great promise for Y3(Al/Ga)5O12:Ce3+,Cr3+,Nd3+ nanocrystals as a PLNP for bio-imaging applications with deep penetration depth and a high signal-to-noise ratio.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
·
2022
·
IF 6.652
Meilin Wei,Solairaj Dhanasekaran,Esa Abiso Godana,Qiya Yang,Yuan Sui,Xiaoyun Zhang,Guillaume Legrand Ngolong Ngea,Hongyin Zhang
Cryptococcus podzolicus Y3 is an antagonistic yeast that can control postharvest diseases of crops and mycotoxins , which is potentially valuable for ensuring food safety. Our previous study showed that C. podzolicus Y3 can efficiently degrade ochratoxin A (OTA), one of the harmful mycotoxins in the environment and food. However, the genomic information of C. podzolicus Y3 and its protein expression profile during OTA degradation are not available. In this study, whole-genome sequencing of C. podzolicus Y3 was analyzed. Protein expression during OTA degradation was investigated by the data-independent acquisition (DIA) technique. The genome size of C. podzolicus Y3 was about 29,181,249 bp length with 58.79% GC content and identified with 17 scaffolds, 9090 coding regions and 127 non-coding regions. The DIA identified 4315 proteins during OTA degradation, among which 101 proteins were significantly up-regulated and 116 were down-regulated. The differentially expressed proteins were mainly involved in reduced glutathione metabolism, phosphatidylinositol signaling system and mitogen-activated protein kinase signaling pathway, calcium ion homeostasis, endoplasmic reticulum protein processing and fatty acid metabolism. Our results provide the genome information of C. podzolicus Y3 for further functional researches. In addition, this study has revealed the toxicity and stress response mechanism of C. podzolicus Y3 during OTA degradation at the protein level.
研究领域:
微生物学
·
基因组学
·
蛋白质组学
·
食品安全
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 24
·17155-17170
·
IF 2.9
Dongsheng Chen,Keqian Gong,Xiangyang Xu,Chenyu Huang,Pengtao Lei
Metal-ion doping and halogen substitution have been largely applied to tune the bandgap of bismuth oxybromide (BiOBr) to upgrade its photodegradation capacity. In this work, the adsorption capacity and photocatalytic behavior of solvothermally synthesized BiOBr photocatalysts can be optimized via the synergistic effect of Y3+- and I−-doping. After an adsorption reaction in the dark and exposure for another 80 min to visible light, pure BiOBr can remove 46.5% of Congo red (CR) from water with an initial CR concentration of 50 mg L−1. Meanwhile, Bi0.8Y0.20OBr0.97I0.03, the co-doped catalyst, displays total degradation rates exceeding 98% and 92% with CR dosages of 50 and 100 mg L−1, respectively, demonstrating a doubled degradation capacity. With the co-doping solution, the negative charges on the catalysts reduce, more oxygen vacancies are generated, the bandgap remarkably narrows, and the photoabsorption range broadens for derivation of photoinduced electron–hole pairs. The mechanism for optimized photodegradation behavior and dramatically increased adsorption capacity are discussed based on analyses of the structural evolution, surface properties including the chemical state and surface charge, electrochemical performance and the yield/type of photogenerated species. Density functional theory (DFT) simulations were conducted to investigate the structural state, density of states (DOS) and electrostatic potential.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qinghai Sun,Zhibo Zheng,Xiaolu Yang,Yanxia Zhao,Zhou Luo,Chao Wang,Yanhua Song,Haifeng Zou,Shihou Sheng
Herein, a variety of single-phase full-spectrum emission phosphors doped with Eu 2+ were synthesized. Under the 350 nm excitation, as K + and Y 3+ were introduced into Ca 10 Na(PO 4 ) 7 (CNP):1.5%Eu 2+ , respectively, the emission color of Ca 9.85 K y Na (1- y ) ( PO 4 ) 7 :1.5%Eu 2+ (0 ≤ y ≤ 1.0) was tuned from yellow to cyan, while that of Ca (9.85- z ) NaY 0.667 z (PO 4 ) 7 :1.5%Eu 2+ (0 ≤ z ≤ 1.0) was tuned from yellow to green. The internal quantum yield (QY) of Ca 9·85 K 0·4 Na 0·6 (PO 4 ) 7 (CKNP):1.5%Eu 2+ and Ca 9·45 NaY 0·267 (PO 4 ) 7 (CNYP):1.5%Eu 2+ reached 47.47 % and 27.11 %, respectively. The introduction of K + or Y 3+ made Eu 2+ selectively occupy the Ca sites and led to changes in the local environment of Eu 2+ , allowing for spectral tuning emission. In addition, the luminescence intensity of the samples retained 54.59 % and 31.34 % of their room temperature values. Eventually, two white light emitting diode (WLED) devices were fabricated, combining the synthesized white emitting phosphors with 365 nm ultraviolet (UV) chips. They exhibited high color rendering indices of 84.7 and 77.0, along with low correlated color temperatures of 5435 K and 5023 K. The Commission Internationale de L'Eclairage (CIE) color coordinates were (0.3349, 0.3975) and (0.3517, 0.4366), respectively. The results pointed to the phosphors' potential suitability for use in the WLED sector.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）