CHEMOSPHERE
·
2020
·
IF 5.778
Ruihan Xiong,Zhuojun Lu,Qian Tang,Xueling Huang,Huazhen Ruan,Wei Jiang,Yiqun Chen,Zizheng Liu,Jianxiong Kang,Dongqi Liu
This study reports on the propranolol (PRO) degradation performance and product toxicity of an ultraviolet light-emitting diode (UV-LED)/chlorine process. The effects of experimental parameters including solution pH, chlorine dosage, and water matrix constituents on PRO removal were evaluated. Up to 94.5% of PRO could be eliminated within 15 min at a PRO-to-chlorine molar ratio of 1:4. The overall removal efficiency of PRO was non-pH dependent in the range of 5–9, while the initial rate was accelerated under alkaline conditions. The presence of Cl − /HCO 3 − had little influence on the PRO degradation, whereas either humic acid or NO 3 − had an obvious inhibitory effect. Radical scavenger experiments showed that both HO and Cl primarily contributed to the PRO degradation, and electron paramagnetic resonance data demonstrated the generation of 1 O 2 . The transformation of PRO during this process led to five detected products, which exhibited a higher acute toxicity than the parent compound according to the bright luminescent bacillus T3 method. It is worth mentioning that under the same ultraviolet illumination intensity, the degradation of PRO under UV-LED/chlorine gave a better performance than UV 254 /chlorine, but the EEO of the former is obviously higher than the latter. So further research is required on improving the electric current to photon conversion efficiency for UV-LED. Additionally, the UV-LED/chlorine system was effective in the degradation of other drugs including sulfamethoxazole, oxytetracycline hydrochloride, and gatifloxacin, suggesting the possible application of the UV-LED/chlorine process for the removal of pharmaceuticals during wastewater treatment .
研究领域:
环境科学
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毒理学
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水处理工程
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DOI
PubMed
高影响因子
TALANTA
·
2019
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IF 4.916
Wanchao Chen,Yinran Xiong,Wenming Wang,Ting Wu,Long Li,Qidi Kang,Yiping Du
A simple and sensitive fluorescence method has been developed for the determination of amiloride (AMI) in pharmaceutical tablet and human serum with a portable, cost-effective, and easy-to-operate fluorescence system. The fluorescence system was assembled with some optical and electronic devices mainly including a 370 nm light-emitting-diode (LED) as light source, a fiber spectrometer and a Raspberry Pi computer. With the system, AMI produced a strong fluorescence emission at 413 nm, and the emitted intensity can maintain good stability with in a wide pH range from 2 to 8. The proposed method was successfully applied to the determinations of AMI in pharmaceutical tablet and human serum. Their detection limits were 1.67 ng mL −1 and 1.43 ng mL −1 respectively, and the recovery was in the range of 94.06–114.0%. Those obtained results proved that the proposed methods combined with the developed fluorescence system could be employed for the routine analysis of amiloride in pharmaceutical tablet and human serum, especially for the fast analysis of them under field conditions.
研究领域:
分析化学
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药物分析
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 102
·期 5
·2718-2726
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IF 2.956
Hong Chen,Yao Wang,Jianhui Lin,Minmin Shuai,Haidi Zhu,Wengong Zhang,Qidan Ling
Herein, a novel transparent phenyl vinyl silicone resin nanocomposite containing exfoliated fluorescent Eu-containing hydrotalcite-like compound (EFHSN) is developed to serve as a dual role of color conversion and encapsulation material. Excited by near-NUV light, the EFHSN emits a strong characteristic red light (614 nm). Meanwhile, the EFHSN shows not only excellent transparency ( T > 95%) in the UV-Vis region and high refractive index (1.46) but also superior thermal stability, which could meet the need of commercial encapsulation materials and optical application. Therefore, the EFHSN is expected to be used in InGaN-based NUV light-emitting diodes and flexible optoelectronic device.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2023
·
IF 3.6
Jiawen Li,Jiawen Wang,Feifei Huang,Youjie Hua,Shiqing Xu,Ruoshan Lei
In pursuit of healthy lighting, the exploitation of high-quality Eu 2+ -activated phosphors available for near-ultraviolet light-emitting diode (NUV-LED) chip-based white LED (WLED) has fetched growing interest. Herein, a novel NUV-light excitable Rb 3 GdSi 2 O 7 : Eu 2+ phosphor is successfully synthesized via a high-temperature solid-state reaction method. The crystal structure of Rb 3 GdSi 2 O 7 is found to be hexagonal, belonging to space group P6 3 /mmc. The Rb 3 GdSi 2 O 7 : Eu 2+ phosphor exhibits a broad excitation band in the 300–450 nm wavelength range, and it emits strong yellow-green light with peak at 543 nm upon 365 nm excitation. Benefitting from the high structure rigidity of host matrix, Rb 3 GdSi 2 O 7 : Eu 2+ also possesses a desired luminescence thermal stability (423 K, 85.6%). The WLED device fabricated using a 365 nm chip and a blend of the as-prepared Rb 3 GdSi 2 O 7 : Eu 2+ yellow-green phosphor and commercial BaMgAl 10 O 17 : Eu 2+ blue phosphor displays an excellent color-rendering index of 95.9 at a low correlated color temperature of 4373 K. This work confirms the applicative potential of Rb 3 GdSi 2 O 7 : Eu 2+ in NUV-converted warm WLEDs, which may promote the development of high-color-quality healthy lighting.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Minghao Zhou,Yanlai Wang
CuGaS2 quantum dots (QDs) with uniform size distribution and monodispersion were successfully synthesized by using the hot injection method. Their microstructure, energy band structure, optical properties, and photocatalytic degradation activity were systematically studied. When the reaction temperature was between 180 and 260 °C, the prepared CuGaS2 QDs exhibited a single chalcopyrite structure. The diameter increased from 5 to 18 nm, while the optical band gap decreased from 3.11 to 2.64 eV. Notably, CuGaS2 QDs synthesized at an optimal temperature of 220 °C, with a mean particle size of 8 nm, demonstrated remarkable photocatalytic activity. Under 60 min of UV-LED irradiation at 365 nm, degradation rates of 93.76% for tetracycline hydrochloride (TCH) and 22.45% for methyl orange (MO) were achieved. These results indicate the tremendous potential of CuGaS2 for water pollution remediation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Dongmei Liu,Yu Xiong,Hui Zeng,Jin Xu,Biyu Tang,Yan Li,Min Zhang
Background Capillary electrophoresis (CE) with capacitively coupled contactless conductivity detection (C 4 D) is widely used for water quality monitoring. However, there is currently no reported CE method for detecting total dissolved nitrogen (TDN), a crucial parameter for assessing water eutrophication . One challenge is the high sulfate concentration (100 mM) introduced during persulfate digestion, leading to overlap of nitrate (from TDN) and poor electrical stacking of nitrate in CE-C 4 D analysis. Results We introduced an in-capillary UV-LED induced photoreaction to convert nitrate to nitrite, which can be baseline-separated from sulfate via the CE method, enabling accurate quantification of nitrate concentration derived from nitrite. A 2 nL post-persulfate digested sample solution within a fused silica capillary was exposed to UV-LED irradiation at the capillary tip. Subsequently, photoreduction-produced nitrite was electrophoretically separated from sulfate in an acidic buffer (pH = 3.7) within the same capillary, followed by contactless conductivity detection. The nitrate-to-nitrite conversion efficiency was influenced by irradiation wavelength, power, and duration, reaching a maximum efficiency of 77.4% when employing two 230 nm LEDs for 5 min. For more general applications, two 255 nm LEDs were used, providing a conversion efficiency of (66.4 ± 3.3)% ( n = 11) for 5 min of irradiation. The proposed CE-C 4 D method exhibits a detection limit of 13 μM (0.18 mg N/L) and has been successfully employed for TDN determination in lake water samples. Significance This innovative approach not only enhances the attractiveness of the CE-C4D method for the determination of water quality indicators but also highlights the potential for integrating deep-UV LEDs into environmental analysis .
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2022
·
IF 6.206
Yinping Wu,Changxiang Dai,Jiasheng Ke,Rui Tang,Chenguang Huang,Jiuwu Wang,Yue Situ,Hong Huang
Three type I radical photoinitiators (BTPO-1–BTPO-3) containing two acylphosphine oxide structures were designed and synthesized for UV-LED photopolymerization . Three kinds of substituents with different lengths of ethoxy chains were introduced into the molecular structure to form a bisacylphosphine oxide photoinitiator. The effects of different lengths of glycols on the performance of bisacylphosphine oxide photoinitiators were explained by UV–vis absorption spectra , photopolymerization properties, steady-state photolysis, solubility in monomers , and mobility. All of the three new photoinitiators BTPO-1/BTPO-2/BTPO-3 not only possess good solubility in acrylate monomers and excellent photopolymerization properties, but also their mobility in cured films is undetectable by extraction method and UV–Vis spectrum technology. Compared with the mobility of conventional commercial photoinitiator TPO-L (0.98 %), the high molecular weight bisacylphosphine oxides show higher migration stability and environmental friendliness. The results show that the novel bisacylphenylphosphine oxide BTPO-1/BTPO-2/BTPO-3 have great potentials as type I free radical photoinitiator for LED light-curing technology in food packaging and biomedical materials fields.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
DALTON TRANSACTIONS
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2023
·Vol. 53
·期 3
·996-1003
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IF 4
Qiang Zhang,Xin Ding,Bin Liu,Yuhua Wang
The development of novel phosphors with excellent luminescence properties for white light-emitting diodes (WLEDs) is always a formidable task. Compared with the traditional laborious and aimless “trial and error” experiments, a mineral-inspired prototype strategy can provide an efficient and accurate method. Herein, for the first time, a novel yellow-emitting phosphor NaBaY2(PO4)3:Eu2+ was discovered using the mineral-inspired prototype strategy and cation substitution method. The phosphor was prepared via the high-temperature solid-state reaction method, and its crystal structure, luminescence properties and potential application for WLEDs were systematically investigated. The NaBaY2(PO4)3 phase was derived from the K2Mg2(SO4)3-type mineral structure and a photoluminescence study revealed that the phosphor can emit bright yellow light with a maximum at 545 nm upon excitation at 351 nm. A WLED lamp was fabricated by the use of a blend of commercial blue-emitting BaMgAl10O17:Eu2+, yellow-emitting NaBaY2(PO4)3:Eu2+ and red-emitting (Ca, Sr)AlSiN3:Eu2+ phosphors with a 380 nm LED chip. The CIE, CCT, Ra and efficiency of the as-fabricated LEDs were measured to be equal to (0.366, 0.365), 4327 K, 91.2 and 40.8 lm W−1, respectively. These results suggest that NaBaY2(PO4)3:Eu2+ could be a promising candidate for n-UV WLEDs.
研究领域:
材料科学
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无机化学
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光电子学
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半导体照明
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发光材料
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 9
·711
·
IF 1.81
Liu Dong,Jin Yahong,Xiong Guangting,Lv Yang,Wu Haoyi,Ju Guifang,Chen Li,Hu Zhengfa,Hu Yihua
A series of broadband blue-green phosphors Rb 0.5+ y Na 1.5− y (Li 3 SiO 4 ) 2 : x Eu 2+ (0 ≤ y ≤ 0.4, 0.01 ≤ x ≤ 0.08) were synthesized by the high-temperature solid-state reaction. The powder X-ray diffraction was employed to explore the crystal structural evolution from RbNa 3 (Li 3 SiO 4 ) 4 to RbNa(Li 3 SiO 4 ) 2 with the increasing of Rb + . The spectra show the optimized composition was determined as y = 0.4. The luminescence, lifetime decay curves and thermal steadily spectra of Rb 0.9 Na 1.1 (Li 3 SiO 4 ) 2 : x Eu 2+ phosphors were investigated in detail. The phosphor of Rb 0.9 Na 1.1 (Li 3 SiO 4 ) 2 :Eu 2+ shows suitable visible spectra (450–550 nm, cover the blue and green regions), excellent thermal quenching (104%@150 °C of the initial integrated intensity at room temperature under 396 nm excitation) and broad excitation spectrum (320–450 nm). Finally, a commercial near-UV LED devices (395 nm) were fabricated with the Rb 0.9 Na 1.1 (Li 3 SiO 4 ) 2 :Eu 2+ phosphor as blue-green and commercial red phosphor CaAlSiN 3 :Eu 2+ with a warm color temperature of 3104 K and a color rendering index of 91.8. This result indicated that Rb 0.9 Na 1.1 (Li 3 SiO 4 ) 2 :Eu 2+ may be a promising blue-green phosphor for indoor lighting.
研究领域:
材料科学
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发光材料
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固体化学
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照明技术
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无机化学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Zhiqin Zheng,Peizhang Xie,Panpan Yi,Jun Zhao,Lihong Liu,Facheng Yi
Nowadays, ultraviolet (UV) and blue converted phosphors have played a key role in the solid-state lighting field, and the white light is usually produced by mixing multiple phosphors. In this work, we report a type of UV converted single white phosphor, i.e. , Ba 9 La 2 Si 6 O 24 :Eu 3+ ,Bi 3+ .Various techniques, such as powder X-ray diffraction (XRD), scanning electron microscopic (SEM), photoluminescence (PL) spectra, and quantum efficiency (QE), have been used to characterize the samples. In Bi 3+ doped samples, upon excitation within the wavelength range of 250–380 nm can lead to three Bi 3+ emission bands ( i.e. , 358 nm, 415 nm, and 516 nm), but only one emission band peaking at 415 nm appears when the excitation wavelength exceeds 380 nm. Structural analysis and discussion on the PL intensity variation reveal there are three Bi 3+ luminescent centers at two different La 3+ sites and one Ba 2+ site. The Bi 3+ concentration-induced luminescent quenching is dominated by the d-d interaction. In view of the spectral overlap between the Bi 3+ emissions and the Eu 3+ excitation spectra , the energy transfer from Bi 3+ to Eu 3+ of the Ba 9 La 2 Si 6 O 24 :Eu 3+ ,Bi 3+ is studied, and it is dominated by a dipole-quadrupole ( d - q ) interaction. Moreover, upon excitation at 365 nm, the emissions broadly tuning from blue, white and to red are achieved by varying the Eu 3+ content. For the white Ba 9 La 2 Si 6 O 24 :Eu 3+ ,Bi 3+ sample, high temperature PL results show that it does not have severe degradation of emission intensity after increasing the temperature from 25 to 300 °C, exhibiting a good thermal stability . To show the potential application in the lighting fields, we fabricate a white light LEDs device by depositing this white phosphor on a 365 nm UV LED chip. As a result, the values, i.e. , a color rendering index (CRI) of 95, luminous efficiency of 80 lm/W, and color temperature (CT) of ~4215 K at chromaticity (0.382, 0.398), are achieved.
研究领域:
材料科学
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发光材料
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固态照明
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无机化学
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光电子学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 10
·1-12
·
IF 2.8
Zhao Jiaqi,Hu Chen,Fang Jiapeng,Sun Ruyi,Lu Jingyao,Su Shikun,Lei Zonghao,Fang Pengfei,Feng He,Degao Zhong,Teng Bing
In this work, a series of iso-structural eulyite-type Ba 3 Yb(PO 4 ) 3 :Tb 3+ solid solution phosphors were synthesized via high-temperature solid-phase method. The corresponding unit cell structure, luminescence properties, thermal stability, and chromaticity coordinates of the as-obtained phosphors were systematically investigated. The crystal structure of Ba 3 Yb(PO 4 ) 3 :Tb 3+ was refined by GSAS program, which indicates the oxygen ions in Ba 3 Yb(PO 4 ) 3 are disordered at one C3 site, and the oxygen atoms are distributed at two sites. Under 378 nm ultraviolet excitation, the emission peak of Ba 3 Yb(PO 4 ) 3 :Tb 3+ appears in the range of 450–650 nm, and a characteristic green emission peak appears at 542 nm. Moreover, the luminous intensity of the Ba 3 Yb(PO 4 ) 3 :14 at.% Tb 3+ sample at 160 °C is 87.7% at room temperature, and the quantum yield is 55.8%, which reveals good thermal stability. Our results suggest that the Ba 3 Yb(PO 4 ) 3 :Tb 3+ phosphors are promising high-efficiency green light conversion materials for UV-LED applications.
研究领域:
材料科学
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光电技术
·
固体化学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Zhao Zhenfu,Wu Zhihai,Cheng Jiong,Jing Liang,Hou Yafei
Organometal halide perovskite quantum dots (PQDs) have recently received much attention as a very promising family of materials with excellent performance in electronic and optoelectronic fields, but these perspectives are being restrained by the severe stability, such as chemical and optical degradations. Herein, we propose and demonstrate a facile solution synthesis of nanocomposites of CH3NH3PbX3 (X = Cl, Br, I) PQDs embedded in magnesium silicate hollow spheres. The resultant nanocomposites preserved the strong photoluminescence of the CH3NH3PbX3 PQDs, and the emission peak can be tunable from blue to red region. Photostability tests demonstrated that the nanocomposite samples were obviously more stable than the bare CH3NH3PbX3 PQDs. The photoluminescence (PL) of the nanocomposite sample still remained at 80% after 72 h UV LED illumination, which was much higher than the remnant PL (30%) of the pure CH3NH3PbX3 PQDs. With their high thermal stability and photostability, we demonstrated that these nanocomposites can be used as phosphors in an on-chip UV LED for multicolor display. It offers a facile method to protect perovskite quantum dots and may have great potential applications in solid-state lighting systems with demand of high-color quality such as lasers, displays, and light-emitting diodes.
研究领域:
材料科学
·
光电技术
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纳米技术
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显示技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）