ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Hao-Hua Deng,Bang-Yue Luo,Shao-Bin He,Rui-Ting Chen,Zhen Lin,Hua-Ping Peng,Xing-Hua Xia,Wei Chen
Although it has been demonstrated that rare-earth elements (REEs) disturb and alter the catalytic activity of numerous natural enzymes, their effects on nanomaterial-based artificial enzymes (nanozymes) have been seldom explored. In this work, the influence of REEs on the peroxidase-like activity of bare gold nanoparticles (GNPs) is investigated for the first time, and a new type of Ce3+-activated peroxidase mimetic activity of GNPs is obtained. The introduced Ce3+ can be bound to the bare GNP surface rapidly through electrostatic attraction, after which it donates its electron to the bare GNP. As H2O2 is a good electron scavenger, more •OH radicals are generated on the surfaces of the bare GNPs, which can considerably enhance TMB oxidation. Due to its redox cycling ability, the activation effect of Ce3+ is proved to be more efficient in comparison to those of the other reported metal ion activators (e.g., Bi3+, Hg2+, and Pb2+). In addition, it is determined that Ce3+ should directly contact with the gold core to trigger its activation effect. When the surface states of the bare GNPs are altered, the Ce3+-stimulated effect is strongly inhibited. Furthermore, a novel colorimetric method for Ce3+ is developed, on the basis of its enhancing effect on the peroxidase mimetic activity of bare GNPs. The sensitivity of this newly developed method for Ce3+ is excellent with a limit of detection as low as 2.2 nM. This study not only provides an effective GNP-based peroxidase mimic but also contributes in realizing new applications for nanozymes.
研究领域:
分析化学
·
纳米生物学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Minghao Zha,Hao Yan,Ruiying Li,Yinghao Sun,Ruitong Wang,Yibin Liu,Xiaobo Chen,Xin Zhou,Xiang Feng,Chaohe Yang
Reducing the formation of trans fatty acid in vegetable oil hydrogenation process is of significance to ensure food safety. Herein, Pd 0 -O 2− -Ce 3+ active site was constructed by strong electronic interactions between Pd 0 and CeO 2 -Polyhedrons to promote the formation of cis fatty acid. Results reveal that the abundant oxygen vacancies of CeO 2 (111) facets promote the adsorption and activation of hydrogen, leading to excellent catalytic activity of Pd/CeO 2 -Polyhedrons. Moreover, electronic reconstructed Pd 0 -O 2− -Ce 3+ active site limits the σ-bond rotation of half-hydrogenated intermediates through enhancing π backdonation and weakening the σ-bond, contributing to the reduction of trans products. Under mild conditions (30 °C, 0.3 MPa H 2 , and 2 h), Pd/CeO 2 -Polyhedrons catalyst shows exceptional methyl oleate selectivity of 52.6% with 93.8% conversion for sunflower oil hydrogenation. The catalyst has been further extended to the selective hydrogenation to several other vegetable oils such as sunflower oil, peanut oil, soybean oil, among others, under mild conditions.
研究领域:
催化化学
·
食品安全
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Bingxin Xie,Lei Lei,Enyang Liu,Gongxun Bai,Renguang Ye,Shiqing Xu
Novel blue LED excitable Ce 3+ -doped alkaline-earth sulfide nanocrystals are exploited for selective and sensitive Fe 3+ ions sensing in this work. The detection limit is calculated to be as low as 92.5 nM, which is better than most previous ultra-violet light excited fluorescence probes. The decreased radiative probability of the Ce 3+ : 5d by the NC surface environmental variation activates the sensing capability.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zengsen Sun,Xinhao Wu,Daqin Guan,Xiaoyi Chen,Jie Dai,Yuxing Gu,Sixuan She,Wei Zhou,Zongping Shao
Electrochemical CO2 reduction (ECR) technology is promising to produce value-added chemicals and alleviate the climate deterioration. Interface engineering is demonstrated to improve the ECR performance for metal and oxide composite catalysts. However, the approach to form a substantial interface is still limited. In this work, we report a facile one-pot coprecipitation method to synthetize novel silver and silver-doped ceria (Ag/CeO2) nanocomposites. This catalyst provides a rich 3D interface and high Ce3+ concentration (33.6%), both of which are beneficial for ECR to CO. As a result, Ag/CeO2 exhibits a 99% faradaic efficiency and 10.5 A g–1 mass activity to convert CO2 into CO at an overpotential of 0.83 V. The strong interfacial interaction between Ag and CeO2 may enable the presence of surface Ce3+ and guarantee the improved durability during the electrolysis. We also develop numerical simulation to understand the local pH effect on the ECR performance and propose that the superior ECR performance of Ag/CeO2 is mainly due to the accelerated CO formation rate rather than the suppressed hydrogen evolution reaction.
研究领域:
材料科学
·
环境科学
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Weixin Zhou,Chaogang Lou
In recent years, significant efforts have been made to explore the application of Ce 3+ 5d-4f radiation transitions in photovoltaic cells. However, conventional fabrication methods are constrained by prolonged preparation times and high processing temperatures. This study synthesizes traditional rare earth YAG: Ce 3+ phosphors using the spark plasma sintering (SPS) method through multi-field coupling and systematically compares their luminescent performance with phosphors prepared by high-temperature solid-state reactions (HTSSR). The crystal structure, morphology, luminescent properties, and fluorescence lifetime of the synthesized phosphors were thoroughly investigated. The results show that YAG: Ce 3+ phosphors synthesized by SPS possess a cubic garnet structure with an Ia-3d space group, confirming the effective incorporation of Ce 3+ into the YAG host. The average particle diameter of YAG:0.01Ce 3+ @SPS-1400 °C phosphors (1.1289 μm) is smaller than that of HTSSR-prepared samples (1.9326 μm). Under 466 nm blue-light irradiation, YAG:0.01Ce 3+ @SPS-1400 °C phosphors exhibit broad-band yellow emission centered at 534 nm, with a full width at half maximum (FWHM) of 102 nm. Compared to other samples, the YAG:0.01Ce 3+ @SPS-1400 °C phosphors demonstrate a slight red shift and a longer fluorescence decay lifetime (43.6 ns). These enhanced luminescent and fluorescence properties contribute to a 0.90 % improvement in the relative efficiency of silicon heterojunction (SHJ) solar cells incorporating YAG:0.01Ce 3+ @SPS-1400 °C phosphors, compared to a 4 % decrease with YAG:0.01Ce 3+ @HTSSR. The findings highlight the potential of SPS-fabricated YAG:Ce 3+ phosphors to enhance SHJ solar cell efficiency, presenting a novel and efficient preparation method for rare earth phosphors.
研究领域:
材料科学
·
能源科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Dong Yang,Kun Ge,Huiyun Ban,Huiping Yuan,Sen Qian,Zhehao Hua,Hua Cai,Danping Chen,Jifeng Han,Xvsheng Qiao,Jing Ren,Xinyuan Sun,Gao Tang,Shenghua Yin,Minghui Zhang,Jiawen Xiao
A series of Ce 3+ -doped Gd 2 O 3 -GdF 3 -Al 2 O 3 -B 2 O 3 -SiO 2 glass scintillators (GSC x and GLC x ) were successfully synthesized in reducing atmosphere for future imaging application. The transmittance of GSC x glasses exceeds 85 % in range of 500–800 nm, and the cut-off edge red shifts as the Ce 3+ concentration increases. In photoluminescence (PL), GSC x glass scintillators have a 360–600 nm broadband emission with a shoulder peak at around 450 nm. Meanwhile, the PL lifetime of GSC x glasses is close to the CeF 3 crystals, and the PL QY of GSC 3 glass scintillator reaches up 70.2 %. For scintillation application, the integral XEL intensity of GSC 2 and GSC 3 glasses is 31.3 % and 24.4 % of that of BGO crystal. GLC 2 and GLC 3 glasses exhibit similar spatial resolution of approximately 7 lp·mm −1 . Moreover, the light yields of GSC 2 and GSC 3 glass scintillator are 1702 and 1690 ph/MeV excited by γ-ray, respectively. The nonproportionality of GSC x glasses is less than 3 % in the range of 100–1400 keV due to the large density and Z eff . As Ce 3+ concentration increases, both the fast and slow components of the glasses decrease (103.7 ns–89.7 ns, 1454.4 ns–1012.8 ns), and the proportion of fast component also increased from 3.3 % to 4.7 %. For γ-ray imaging, the scintillation light events of the glass can be observed from SiPM array, and the central position (−2, −1) have the highest count rate of the system. The results show that GSCx and GLCx glass scintillators deserve further development for future applications.
研究领域:
材料科学
·
核医学
·
生物医学工程
·
辐射探测
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yong Tang,Jianwei Zhao,Yi Li,Yujing Wang,Guangqiu Zhang,Yihang Zhao,Lirong Qin
In this study, we synthesized Co 3 O 4 :Ce 3+ /Mn 2+ granular nanowires on nickel foam as an electrode for supercapacitors using a hydrothermal method. The introduction of Mn 2+ ions into the Co 3 O 4 :Ce 3+ electrode material increased the oxygen vacancy and Co 2+ /Co 3+ ratio of the material, resulting in an increase in electrical conductivity and electrochemical performance. In the three-electrode system, the Co 3 O 4 :Ce 3+ /Mn 2+ electrode achieved a specific capacitance of 2527.8 F/g at 1 A/g, which is 65 % higher than that without Mn 2+ ions. A symmetric supercapacitor (SSC) device was prepared by assembling two electrode components. At a current density of 1 A/g, the SSC device achieved a specific capacitance of 467.0 F/g, delivering a maximum energy density of 233.5 Wh/kg (1 A/g) and a maximum power density of 36,600 W/kg (20 A/g), coupled with outstanding cycling stability. These results indicate that the Co 3 O 4 :Ce 3+ /Mn 2+ nanowires coated nickel foam electrode holds considerable promise for applications in energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
·
电化学储能
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 13
·21560-21568
·
IF 3.83
Mingcai Li,Xuejie Zhang,Yinjian Zheng,Yaliang Xu,Haoran Zhang,Yingliang Liu,Bingfu Lei
The discovery of light converter excited by near-ultraviolet (UV) superior broadband blue-emitting lighting source is a main challenge in plant growth LEDs. In this study, SrLu 2 O 4 :Ce 3+ , Li + , F − blue phosphor has been synthesized via a solid-state reaction. Benefitting from doping of F − ions, SrLu 2 O 4 :Ce 3+ , Li + , F − phosphor (λ ex = 405 nm, λ em = 460 nm) shows a strong broadband (FWHM = 90 nm) blue-emitting with lower critical concentration of Ce 3+ ions and an increasing 6.9% thermal quenching performance (92.1% @ 423 K of the peak intensity at room temperature). Moreover, a blue light converter composed of SrLu 2 O 4 :Ce 3+ , Li + , F − phosphor and glass matrix is obtained based on phosphor-in-glass (PiG) technology, exhibiting excellent thermal stability and outstanding moisture resistance . A red light converter with commercial red phosphor is obtained by the same method. Furthermore, by combining of two light converters with near-UV chip, a proof-of-concept plant growth high power LED is achieved and applied in indoor Italian lettuce growing in comparison with commercial plant lamps.
研究领域:
材料科学
·
光学工程
·
农业光电子学
·
固体发光
·
无机非金属材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Haidong Ju,Jiaqin He,Hongguang Guo,Yanmei Dao,Chengning Jiang,Xiujun Deng,Baoling Wang
Recently, low-cost, blue-light-excited, and cyan-emitting phosphors have become increasingly important for commercial white light-emitting diode (LED). In this study, a new garnet-type phosphor, Ca 2 LuAl 3 Si 2 O 12 : Ce 3+ (CLASO: Ce 3+ ) with a small Stokes shift and a broad cyan-emitting band, was successfully developed through an ion-replacement technique. Rietveld refinement results confirmed its garnet structure with small crystallographic parameters of a = 11.8850(4) Å and V = 1678.81(18) Å 3 . The CLASO: Ce 3+ phosphor featured two wide absorption bands in the 280–500 nm range, with a maximal peak at 445 nm, matching well with the emission wavelengths of commercial blue LED chips. Upon 445 nm excitation, the optimal CLASO: 0.04Ce 3+ phosphor exhibited a broad cyan-emitting band peaking at 504 nm, with a full width at half maximum of 103 nm. This made it an ideal candidate for filling the cyan gap of blue-pumped white LEDs, thereby enhancing the color rendering index. The excitation and emission spectra of CLASO: Ce 3+ phosphor revealed an ultra-small Stokes shift of 2631 cm −1 , which was attributed to its exceptionally strong structural rigidity – an important factor for energy conversion and luminescent stability. Moreover, the internal quantum efficiency of CLASO: 0.06Ce 3+ was found to be 88 %. Finally, a phosphor converted LED device was assembled using a 445 nm blue LED chip and CLASO: 0.06Ce 3+ cyan phosphors. The device exhibited a high luminous efficacy of 119 lm/W and an excellent stability. The exploration of the relationship between the Stokes shift and photoluminescence properties provides a novel approach to improving phosphors for high performance white LED.
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
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Yuqi Huang,Tiange Li,Mengmeng Lei,Xianqing Huang,Tianlin Wang
In the present investigation, we demonstrated a simple approach for the reproducible synthesis of cerium(III)-based blue phosphor, which provides versatile applications in the construction of warm white-light-emitting diodes (WLEDs) and anticounterfeiting patterns. It is found that the mixture of dipicolinic acid (DPA) with Ce3+ in ethanol (DPA-Ce) emits blue fluorescence under the assistance of ultraviolet (UV) induction. The quantum yield of the DPA-Ce phosphor reaches 44% and is improved to 52% by combining with guanosine 5′-monophosphate (GMP). The obtained DPA-Ce-GMP emits blue fluorescence in both a solid powder and aqueous solution, having advantages of long luminescence lifetimes, ultralong stability, and outstanding antitemperature bleaching. With DPA as a universal ligand, DPA-Tb with green fluorescence and DPA-Eu with red fluorescence are integrated with the blue fluorescence of DPA-Ce-GMP to construct full-color and white-light-emitting devices. The as-prepared warm WLED with a quantum yield of 64% presents an excellent stability and high quality with a color rending index of up to 90, CIE color coordinates of (0.37, 0.36), a correlated color temperature of 3950 K, and a luminous efficiency of 37.8 lm W–1. Multiple anticounterfeiting patterns are further encoded with the as-prepared lanthanide-based phosphors. The investigation offers a simple assay for the cost-effective, large-scale synthesis of phosphors, with great promise in diverse applications including the lighting industry and anticounterfeiting technology.
研究领域:
材料科学
·
光学工程
·
应用化学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE COMMUNICATIONS
·
2017
·
IF 1.554
Jingjing Chen,Yang Zhao,Guanghao Li,Zhiyong Mao,Dajian Wang,Lijian Bie
In this paper, facile synthesis of CaAlSiN 3 :Ce 3+ yellow-emitting phosphors under atmospheric pressure at a moderate temperature and their photoluminescent properties are reported. The prepared CaAlSiN 3 :Ce 3+ phosphors exhibit a broad yellow emission band positioned at 580 nm and covering a bandwidth of 150 nm. The thermal stability of CaAlSiN 3 :Ce 3+ phosphors shows obvious superiority than the commercial YAG: Ce 3+ phosphor, indicating its promising application prospect in power LEDs . In addition, the enhancement of red-light component for CaAlSiN 3 :Ce 3+ phosphor is demonstrated by co-doping Eu 2+ ions. This study offers a facile route to prepare CaAlSiN 3 :Ce 3+ yellow-emitting phosphors, which may be used as a promising candidate for high performance white LEDs .
研究领域:
材料科学
·
发光材料
·
无机化学
·
固态照明
·
光电功能材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 11
·期 2
·488-496
·
IF 8.067
Min-Hang Huang,Qiang-Qiang Zhu,Shuxing Li,Yue Zhai,Hong Zhang,Le Wang,Rong-Jun Xie
The key to developing laser-driven solid-state lighting lies in high-performance color converters, which must be thermally robust under the high-power density excitation of a laser. Phosphor-in-glass (PiG) films are considered as a kind of promising color converter for laser lighting, but the poor thermal dissipation of the glass matrix will cause large thermal quenching of the PiG films and hence low luminous flux of lighting sources. In this work, Al2O3 particles, acting as a heat transfer medium, are introduced into the La3Si6N11:Ce3+ (LSN:Ce3+) PiG film to form a composite color converter for realizing high-brightness laser lighting. By optimizing the ratio of glass frits to Al2O3 as well as the film thickness, the Al2O3–LSN:Ce3+ composite PiG film shows a luminance saturation threshold of 23.08 W mm−2, which is 26.3% higher than that of the Al2O3-free LSN:Ce3+ PiG film (18.27 W mm−2). The luminous flux of the composite PiG film under blue laser excitation is improved by 51.4% and reaches 3120 lm, and the luminous flux of the laser-driven white light can reach up to 2886 lm. It indicates that the Al2O3–LSN:Ce3+ composite PiG film would be an interesting color converter for producing high-brightness laser-driven white light.
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
危险品化学品经营许可证（带存储）