MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Yang Liu,Jia Bao,Xiao-Min Hu,Gui-Lin Lu,Wen-Jing Yu,Zhen-Hao Meng
Water bodies of numerous countries and regions in the world have been contaminated to various extents with the widespread production and usage of perfluoroalkyl substances (PFASs). Both domestic and industrial wastewaters become one of the important sources for the PFAS contaminations in natural water bodies, due to the incomplete treatment. Usually, the artificial wastewaters are complex and have high concentrations of inorganic salts, which could result in the matrix effects during the process of analysis for PFASs, contributing to quantify the target compounds inaccurately. In order to monitor the concentrations of PFAS contaminants precisely, suitable extraction methods were compared focusing on the matrix effects and characters of green analytical chemistry during the detection of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) existing with several common inorganic salts in wastewaters. The results showed that the analytical values of PFOA and PFOS were 2.8–3.6 times and 3.0–5.2 times higher than the theoretical values, respectively. The liquid-liquid extraction (LLE) and solid phase extraction (SPE) methods were used to reduce the matrix effects originated from inorganic salts, consequently the SPE method was confirmed as the optimal extraction method, based upon both the recoveries and green procedures. Combined with the application of the best parameters in real industrial wastewaters, indicating the present study would provide an accurate and green quantitative analysis of PFASs in salty wastewaters.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Essential Oil Bearing Plants
·
2020
·
IF 0.824
Gaoming Lei,Chaoying Song,Erqiang Wang,Senming Zhao,Cheng Yang
The use of a mixed-salt substrate (sodium chloride-choline bromide-1-ethyl-1-methyl-pyrrolidinium bromide; molar ratio: 1:1:1) has been proposed for hydrodistillation of essential oils. Tree peony ‘Taiping Hong’ (Paeoniaceae), a cultivated essential oil-bearing plant, was investigated. After using the salt substrate, distillation time decreased from 140 to 40 min, essential oil yield increased from 0.48 % to 0.69 % and the pseudo-first-order rate constant increased from 0.0233 to 0.123 min-1. Potential mechanisms are (1) osmosis effect and hydrogen-bond interactions, which improve cell wall rupture; (2) the increase in polarity of aqueous distillation media, which prevents emulsification. The essential oil composition was influenced by an increase in oxygenated compound content (32.9 % to 49.0 %) and a decrease in hydrocarbon content (65.3 % to 49.6 %). Furan linalool oxide (cis and trans), linalool and α-terpineol contents increased by 400 %, 250 % and 200 %, respectively. (E,E)-α-farnesene, α-muurolene and octadecane contents decreased by 50 %, 46 % and 38 %, respectively. Possible mechanisms are: (1) improved cell rupture, which significantly facilitates extraction of oxygenated compounds; (2) hydrogen bonding with oxygenated compounds, which enhances their transfer from the inside of cells to bulk solution; (3) salting-out effect, which decreases dissolution of oxygenated compounds and improves their distillation. The essential oil obtained was mainly composed of phloroglucinol trimethyl ether (21.9 %), nerol (10.2%), tricosane (9.1 %), nonadecane (9.0 %), α-muurolene (5.0 %) and furan linalool oxides (3.0 %). Target prediction analysis indicated that it has potential applications in aromatherapy. In conclusion, the use of the mixed-salt substrate combined with hydrodistillation can result in efficient isolation of essential oils.
研究领域:
植物化学
·
药用植物学
·
芳香疗法
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Z.H. Xu,C. Wang,X.Z. Xiong,W.B. Dai
Borate-based phosphors, as a critical class of luminescent materials, have garnered significant attention due to their stable crystal structures, wide bandgaps, excellent thermal stability, and robust spectral tunability, making them essential components in white light-emitting diodes ( w LEDs) technologies. In this work, a high-symmetry Ba 3 Y 2 B 6 O 15 (BYB) phosphor co-doped with Bi 3+ , Tb 3+ , Eu 3+ , and Lu 3+ was synthesized via a multi-step sol-gel method. Different photoluminescence (PL) behaviors of Bi 3+ , Tb 3+ and Eu 3+ in BYB were systematically revealed. By modulating the PL spectrum via energy transfer (ET) from Bi → Tb → Eu, ‘cool’ white-light emission was achieved. A strategy of replacing Y 3+ with Lu 3+ was adopted to adjust the crystal field splitting and symmetry. This modification broadens the blue light coverage range in Bi 3+ PL, increases the hypersensitive transition of Eu 3+ ( 5 D 0 → 7 F 2 ), increase the intensity of red emission. They achieved their optimal balance ultimately. The improved structural compactness and rigidity reduced electron-phonon coupling effects, endowing the phosphor with superior chemical/thermal stability. Finally, a high-performance phosphor-converted w LED (pc- w LED) device with chromaticity coordinates of (0.361, 0.358), a luminous efficacy (LE) of 95.2 lm/W, was fabricated by integrating the optimized BYB: Bi/Tb/Eu/Lu phosphor with a UV LED chip using remote ‘cap’ packaging, demonstrating exceptional performance.
研究领域:
材料科学
·
光学工程
·
无机化学
·
固态照明
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
Food & Function
·
2020
·Vol. 11
·期 5
·3811-3822
·
IF 4.171
Xiaolin Yao,Xiaoxue Yao,Kai Xu,Kao Wu,Fatang Jiang,Katsuyoshi Nishinari,Glyn O. Phillips
Iron-deficiency anemia is an important health problem in global public issues, and development of iron fortifiers in diets is essential for the decrease of iron deficiency. However, there are problems for iron fortification in food because the common bioavailable iron compounds would contribute to iron-promoted lipid oxidation and unpleasant iron odor, presenting an adverse food quality. Ferrous fumarate loaded microstructured gel beads were prepared by an emulsification–gelation method using an alginate-caseinate matrix, and the gel network was formed by crosslinking of Ca2+ or Fe2+. Internal gelated beads showed relatively symmetrical and homogeneous spheres with no adhesion due to the simultaneous release of Fe2+ to initiate gelation in situ. External gelated beads displayed an irregular and adhesive structure, probably because the random contact between Na-ALG and Ca2+ occurred on the droplet surface, and the immediately gelated hardening layer provided a delay for further Ca2+ diffusion. The gel beads exhibited a lag phase in the promotion of lipid oxidation of the emulsion and restrained the iron odor release from ferrous fumarate. Ferrous ion release from microstructured gel beads in the simulated gastric juice was obviously delayed before a more progressive high release in the simulated intestinal juice, beneficial for iron absorption in the duodenum. The iron encapsulated microstructured gel beads might be developed as a promising safe iron fortifier by relieving lipid oxidation and iron odor.
研究领域:
食品科学
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营养学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Yaping You,Ya Zheng,Zesheng Pan,Yunluo Wang,Tianrui Zhou,Minghui Wang,Haijie Chen,Wan Jiang,Lianjun Wang
White light-emitting diode (WLED) has been widely used as solid-state lighting in recent years, with the advantages of energy saving, high luminous efficiency , and safety. Red phosphors are crucial to the color rendering index of WLED, and Eu 3+ -activated red phosphors can significantly improve the chromaticity performance of WLED. In this work, a series of new orange-red emitting BaLiZn 3 (PO 4 ) 3 : Eu 3+ phosphors were synthesized through high-temperature solid-state reaction method. The phase composition , crystal structure, morphology and photoluminescence properties of BaLiZn 3 (PO 4 ) 3 : Eu 3+ samples were investigated. The phosphors can be effectively excited by the violet light at 394 nm and emit orange-red lights corresponding to the electric dipole transition (5D 0 →7F 1 ) at 594 nm. The optimal doping concentration of Eu 3+ ions was about 5 mol%. The concentration quenching was caused by the electric dipole-dipole interaction between Eu 3+ ions. Temperature-dependent PL spectra indicate that BaLiZn 3 (PO 4 ) 3 : Eu 3+ has excellent emission and color stability at high temperatures. The color coordinates were calculated and fall in the orange-red luminescent area. The color purity is about 98.3 %, and the correlated color temperature is 1710K. These results indicate that the new orange-red phosphor BaLiZn 3 (PO 4 ) 3 : Eu 3+ has potential application prospects in WLED.
研究领域:
材料科学
·
发光材料
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固体照明
·
无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2019
·Vol. 34
·期 7
·1374-1379
·
IF 3.646
Wanjing Cui,Hongfang Hou,Jiaojiao Chen,Xiaoping Yu,Yafei Guo,Zhanhui Tao,Tianlong Deng,Yu-Wei Chen,Nelson Belzile
A sensitive and interference-free iodine speciation analysis in high salt matrix is crucial either for the application of iodine ion-exchange adsorption removal or in chlor-alkali industrial of caustic soda. In this study, we investigated the iodine speciation using the high performance liquid chromatography (HPLC) coupled with inductively coupled plasma mass spectrometry (ICP-MS). Peak splitting under high salt matrix was found and solved using the new efficient mobile phase of ammonium carbonate. A high-efficiency separation anion-exchange column (Dionex IonPac AS-14) for iodate and iodide with 100 mM (NH4)2CO3 solution at pH = 10 as mobile phase was confirmed, and the total running time of individual sample was within 8 min. Linear standard calibration plots were obtained in a concentration range of 1.0–100 μg L−1 for both iodate and iodide, and the detection limits were 0.05 μg L−1 for the former and 0.20 μg L−1 for the latter. A precise analytical procedure of HPLC-ICP-MS was developed to rapidly and exactly determine the iodine species of iodide and iodate at trace levels in high salt brine samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2014
·Vol. 26
·期 2
·884-890
·
IF 1.966
Li Rui,Wang Yan-ze,Mao Zhi-yong,Wang Da-Jian
A remote phosphor coating by using Sr 3 (Al,Si)(O, F) 5 :Ce 3+ (SASF:Ce 3+ ) on glass substrate was prepared by a simple and convenient screen printing method. The crystalline phase and the distribution of SASF:Ce 3+ crystals in coating were investigated by XRD and SEM, respectively. The scattering light and absorption light properties of remote phosphor coating with different thicknesses were discussed through Lambert–Beer’s law. The relationship between luminous efficiency and absorption coefficient was demonstrated. White light emitting diode prototype fabricated with blue chip and the prepared patterned SASF:Ce 3+ remote phosphor in this work showed excellent performances, opening a cost-effective process to generate planar white light.
研究领域:
材料科学
·
光学工程
·
发光材料
·
固态照明
·
功能涂层
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Hongshi Zhang,Jiyou Zhong,Xiaoli Zhang,Huanxin Yang,Zhongfei Mu,Weiren Zhao
Spectral coverage and saturability within 700–1100 nm of phosphor-converted near infrared light-emitting-diodes (pc-NIR LEDs) are crucial for the practical applications in bioimaging, food quality analysis and night vision fields, while developing ultra-broadband NIR phosphors are still a challenge. Herein, we reported a broadband NIR phosphor LiInP 2 O 7 : Cr 3+ in phosphate system. The emission spectrum of this phosphor covers 700–1200 nm with a full width at half maximum (FWHM) of 165 nm and an emission peak centering at 860 nm under 460 nm excitation. This broadband emission is verified to be derived from 4 T 2 g → 4 A 2 g transition of Cr 3+ in a single crystal site. To further expand the emission spectrum , Cr 3+ →Yb 3+ energy transfer in LiInP 2 O 7 was designed, and an ultra-broadband emission with a FWHM of 225 nm was obtained through appropriate amount of Yb 3+ codoping. The energy transfer efficiency can reach as high as 81% in this material. Furthermore, the energy transfer mechanism, quantum yield , thermal stability and fabrication performance were investigated in detail, demonstrating the ability of achieving ultra-broadband and efficient NIR emission of LiInP 2 O 7 : Cr 3+ , Yb 3+ phosphor material.
研究领域:
光学材料
·
生物医学成像
·
分子探针
·
光电子学
·
无机功能材料
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 17
·6908-6917
·
IF 4.569
Xuexia Chen,Ran Pang,Shangwei Wang,Jiangyue Su,Weihong Yuan,Shengjian Jiao,Haiyan Wu,Da Li,Chengyu Li,Hongjie Zhang
Bi3+ has gained increasing attention due to its abundant reserves, adjustable luminous colour and high chemical stability, therefore, Bi3+-activated luminescent materials have already been extensively applied in various fields. Herein, a novel blue-emitting CaNaSb2O6F:Bi3+ (CNSOF:Bi3+) phosphor with a pyrochlore-type structure with the space group Fdm (277) was successfully synthesized. It exhibits a broad absorption band in the n-UV region (290–390 nm) and an ideal blue emission band centered at 441 nm. Interestingly, the wide emission peak of CNSOF:Bi3+ shows strongly temperature-dependent fluorescence properties and good thermal degradation resistance in the cycle temperature range from 298 K to 473 K, and the relative sensitivity is calculated to reach the maximum value of 2.34% K−1 at 423 K. Besides, the phosphor is different from a traditional optical temperature sensing material which shows the emission peak of trivalent rare earth ions. The wide emission peak makes the instrument insensitive to the peak shift, which dramatically reduces the requirement of the instrument, and the emission peak does not shift with the temperature to enhance the measurement stability, thus saving the cost. These results indicate that the CNSOF:Bi3+ blue emitting phosphor has potential applications in temperature sensing.
研究领域:
材料科学
·
无机化学
·
光电子学
·
功能材料
·
传感器技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 43
·16740-16747
·
IF 4.569
Liwei Zeng,Jiyou Zhong,Wenbin Lin,Weiren Zhao
Near-infrared (NIR) spectroscopy (700–1100 nm) based on a phosphor-converted light-emitting diode (pc-LED) has multi-functional applications in bio-imaging, night-vision, and food quality analysis, simulating the development of efficient and ultra-broadband NIR phosphors. Herein, a series of tunable and ultra-broadband NIR phosphor Ga2−2xZnxGexO3:Cr3+ was successfully produced by a [Zn2+–Ge4+] unit co-substituting a [Ga3+–Ga3+] unit in Ga2O3:Cr3+. With the increasing amount of [Zn2+–Ge4+] incorporation, the emission peak can be tuned from 726 to 808 nm, and the maximum FWHM can be extended from 126 to 190 nm. However, the excitation peak position remained nearly unchanged in the blue light region, enabling this material to perfectly match the InGaN blue LED chip. Although the gradually enhanced electron–lattice coupling and low energy barrier for thermal quenching caused by this co-substitution lead to a decrease in the photoluminescence quantum yield (PLQY) and thermal stability, respectively, the absolute values of these two criteria can be well maintained. Finally, to evaluate the practical applications, prototype NIR pc-LEDs were fabricated using these materials combined with 450 nm LED chips. Under the same conditions, the NIR output power and photoelectronic conversion efficiency of these devices are superior to those fabricated using the well-known ScBO3:Cr3+ phosphor. These results demonstrate that this series of materials with tunable and ultra-broadband NIR emissions has great potential for NIR pc-LED applications.
研究领域:
材料科学
·
光学工程
·
生物医学成像
·
半导体器件
·
光电子学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Qiuyue Mu,Huimin Li,Ran Pang,Da Li,Su Zhang,Xiaodong Li,Lihong Jiang
A series of Pr3+ doped Sr2NaMg2V3O12 (SNMV) garnet phosphors were successfully synthesized by high temperature solid state method. The crystal structure, luminescent properties and temperature sensing properties of the phosphors were systematically studied. Under the excitation of 339nm, SNMV:Pr3+ phosphors exhibit strong blue-green broadband emission in the wavelength range of 400-700nm and typical red emission of Pr3+ at 612nm and 624nm, which correspond to the energy level transition of [VO4]3- group and 1D2→3H4,5 transition of Pr3+, respectively. Furthermore, in the temperature range of 98K-298K, high sensitivity optical temperature sensing is realized based on fluorescence intensity ratio (FIR) and fluorescence lifetime (FL). In FIR mode, the maximum absolute sensitivity (Sa) and relative sensitivity (Sr) of the phosphor are 0.01782K-1 (298K) and 1.13543%K-1 (298K), respectively. In FL mode, the maximum Sa value and Sr value are 0.0889K-1 (198K) and 0.62752%K-1 (223K), respectively. The results show that SNMV:Pr3+ phosphors have great potential in the field of optical temperature measurement.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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