JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Ruiting Zhang,Yahong Jin,Lifang Yuan,Kaiyuan Deng,Chuanlong Wang,Guangting Xiong,Li Chen,Yihua Hu
Photochromic materials usually have different physical and chemical properties when they are in different states. Inorganic photochromic materials are widely used in the fields of information storage, optical switches and sensors due to their long lifetime, good thermal stability and fatigue resistance . However, the current inorganic photochromic materials, possessing a unitary optical property , cannot fulfill the requirement of multimodal high-level security anti-counterfeiting. In this work, we report the multiple optical behaviors integrated inorganic photochromic Er 3+ -doped strontium hafnate ceramics. It integrates multiple optical functions, including photochromism, downshifting photoluminescence , up-conversion luminescence, afterglow, and thermoluminescence . The fluorescence modulation contrast (FMC) maximum of SrHfO 3 : Er 3+ can achieve as high as to 77.21% in the mode of photochromism-driven the quenching of downshifting photoluminescence. The FMC maximum can approach 70.24% in the mode of photochromism-driven the quenching of up-conversion luminescence. By alternating the light stimulation and thermal field effect, both photochromism and fluorescence modulation exhibit excellent stability and robust fatigue resistance. The mechanisms of the observed photochromism, downshifting and up-conversion luminescence, fluorescence modulation, afterglow, and thermoluminescence were studied systematically. The combination of the multiple optical behaviors functionalizes the as-obtained material for versatile applications. As a proof of concept, a flexible film was designed and prepared, demonstrating the practical application of SrHfO 3 : Er 3+ material for multimodal high-level security anti-counterfeiting.
研究领域:
材料科学
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光学
·
光子学
·
安全与防伪
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 84
·80595-80603
·
IF 3.289
Yang Rong,Liang Tang,Yahui Song,Shengnan Wei,Zhaohong Zhang,Jun Wang
A new visible-light-sensitive photocatalyst, Er3+:Y3Al5O12/MoS2–NaTaO3–PdS, was prepared by hydrothermal, liquid boiling and deposition methods. The prepared photocatalysts were all characterized using an X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). The photocatalytic activity of the prepared photocatalysts was evaluated via photocatalytic degradation of amaranth as a refractory pollutant with simultaneous hydrogen evolution under visible-light irradiation. Moreover, the effects of the visible-light irradiation time and molar ratio of Er3+:Y3Al5O12 and NaTaO3 on the photocatalytic capability of Er3+:Y3Al5O12/MoS2–NaTaO3–PdS were studied. The results show that the use of Er3+:Y3Al5O12 can improve the utilization ratio of visible light (solar light) for NaTaO3. The optimum ratio of Er3+:Y3Al5O12 and NaTaO3 is 0.45 : 1.00. In addition, a study of extended reusability shows that the prepared photocatalyst can be effectively recycled for three repetitive cycles without an apparent deactivation of the photocatalytic activity. A visible-light photocatalytic degradation mechanism of amaranth with simultaneous hydrogen evolution is also proposed.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2018
·
IF 6.012
Guowei Wang,Siyi Li,Xue Ma,Jing Qiao,Guanshu Li,Hongbo Zhang,Jun Wang,Youtao Song
A novel Z-scheme coated composite, Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 , was designed for sonocatalytic degradation of sulfanilamide and fabricated by sol-hydrothermal and calcination methods. The prepared sample was characterized by X-ray diffractometer (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), UV–vis diffuse reflectance spectra (DRS), fourier transform infrared (FT-IR) spectra, Raman spectra and photoluminescence (PL) spectra. In Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 , Ni(Fe 0.05 Ga 0.95 ) 2 O 4 and BiVO 4 form a Z-scheme sonocatalytic system, Er 3+ :Y 3 Al 5 O 12 as an up-conversion luminescence agent (from visible-light to ultraviolet-light) provides the ultraviolet-light for satisfying the energy demand of wide band-gap Ni(Fe 0.05 Ga 0.95 ) 2 O 4 and Au nanoparticles as co-catalyst forms more active sites to enrich electrons. Also, Au nanoparticles as conductive channels promotes the electrons (e − ) from conduction band of BiVO 4 to transfer to valence band of Ni(Fe 0.05 Ga 0.95 ) 2 O 4 . Due to the characteristics of valence state diversity, the Fe 3+ and V 5+ constitute a redox reaction recombination system, which can also push electrons (e − ) on conduction band of BiVO 4 to quickly transfer to valence band of Ni(Fe 0.05 Ga 0.95 ) 2 O 4 . The sonocatalytic activity of Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 nanocomposite was detected through degradation of sulfanilamide under ultrasonic irradiation. A high sonocatalytic degradation ratio (95.64%) of sulfanilamide can be obtained when the conditions of 10.00 mg/L sulfanilamide, 1.00 g/L Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 , 300 min ultrasonic irradiation and 100 mL total volume were adopted. Some factors such as ultrasonic irradiation time and cycle number on the sonocatalytic degradation efficiency are also investigated by using TOC and UV–vis spectroscopy. Subsequently, the effects of hydroxyl radicals ( OH) and hole scavengers were investigated to elaborate the mechanism. The researches show that the prepared Z-scheme Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 coated composite displayed an excellent sonocatalytic activity in degradation of sulfanilamide under ultrasonic irradiation.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Linghui Shen,Tong Wei,Yongchao Shi,Hanyu Hao,Si Chen,Jiaguang Chen,Hao Guan,Qingjun Zhou,Zepeng Li
The various applications of luminescence materials were generally based on the effective modulation of luminescence spectra. However, the research on reversible spectral regulation of up-conversion (UC) luminescence materials was still in its infancy stage. In this work, a class of smart phosphor, Er 3+ and Yb 3+ -codoped SrBi 8 Ti 7 O 27 (SBYT: xEr 3+ ) intergrowth bismuth layer-structured ferroelectric , possessing fast sensitivity to visible light irradiation, was reported based on visible light driven photochromic effect. Through the alternate stimuli of light irradiation and heating treatment, the reversible regulation of UC luminescence was achieved accompanying with the switching of coloration and decoloration processes. The luminescence modulation degree tightly relied on the irradiation time and thermal treatment modes. The reversibility and stability properties were also revealed. Moreover, it is found that polarization treatment was an effective approach which can be adopted to improve the UC luminescence contrast. The maximum luminescence modulation ability of SBYT: xEr 3+ reached up to 81.3% which was 131% of that un-polarized sample. It is believed that SBYT: xEr 3+ ceramics can act as a promising candidate for optical data storage and anti-counterfeiting applications.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Zhiyu Liu,Liang Chen,Congcong Piao,Jianhe Tang,Yu Liu,Yitong Lin,Dawei Fang,Jun Wang
A novel Z-scheme WO 3 :Yb 3+ ,Er 3+ /Ag/Ag 3 VO 4 /Ag photocatalyst is prepared via hydrothermal and calcination methods. In this system, WO 3 :Yb 3+ ,Er 3+ is used as an excellent up-conversion luminescent agent and highly active photocatalyst to broaden the light response range. Ag with SPR effect is regarded as electronic channel and cocatalyst to accelerate electron transfer and increase hydrogen production. The photocatalytic performance of Z-scheme WO 3 :Yb 3+ ,Er 3+ /Ag/Ag 3 VO 4 /Ag photocatalyst is assessed by levofloxacin degradation with synchronous hydrogen production. Some influence factors, sunlight irradiation time, sacrificial agent concentration and catalyst cycle number, are discussed. The emission light spectrum and energy conversion mechanism of WO 3 :Yb 3+ ,Er 3+ are studied. The photocatalyst gives prominent degradation ratio (90.44 %) and hydrogen production amount (489.02 μmol/g) under sunlight irradiation for 180 min. It shows a high stability and reusability in levofloxacin degradation with synchronous hydrogen production within five cycles. The possible mechanism of levofloxacin degradation with synchronous hydrogen production caused by Z-scheme WO 3 :Yb 3+ ,Er 3+ /Ag/Ag 3 VO 4 /Ag photocatalyst is proposed.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Jinsheng Liao,Zhuo Han,Junxiang Huang,Biao Fu,Yijian Sun,Huali Yuan,Herui Wen
This paper reports a new type of PbTiO 3 :Yb 3+ /Er 3+ (PTO:Yb 3+ /Er 3+ ) phosphor synthesized by sol-gel method. Under 980 nm excitation, PTO:Yb 3+ /Er 3+ phosphors exhibited green emission bands centered at 524/549 nm ( 2 H 11/2 / 4 S 3/2 → 4 I 15/2 ) and red emissions 661 nm ( 4 F 9/2 → 4 I 15/2 ). Concentration-dependent upconversion (UC) luminescence spectra showed that the optimal luminescence was observed at 6at%Yb 3+ /2at%Er 3+ -codoping concentration. A possible UC mechanism for PTO:Yb 3+ /Er 3+ phosphor is discussed by the pump power-dependent UC luminescence spectra. The temperature-dependence (298–548 K) of the fluorescence intensity ratios (FIR) for the two green UC emission bands peaked at 524 and 549 nm was studied under a 980 nm laser excitation and the maximum relative sensitivity was approximately 12.25 × 10 −3 K −1 at 298 K. The thermal quenching activation energy of near-infrared (NIR) luminescence was studied. It can be found that the phosphor has a small thermal quenching possibility and excellent thermal stability. The value of repeatability (R) more than 98% has obtained via four cycles of cooling and heating, which prove that the phosphor has a good cycling stability. These results indicate that PTO:Yb 3+ /Er 3+ phosphor is a promising candidate for optical temperature sensors with high sensitivity and good repeatability.
研究领域:
材料科学
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光学
·
温度传感
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DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2019
·Vol. 645
·期 21
·1240-1246
·
IF 1.337
Lu Yuan,Ming Kang,Guanjun Chang,Xiangmeng Lv,Simin Shen,Rong Sun
Due to the unique size effects, nanomaterials in infrared absorption have attracted much attention for their strong absorption in the infrared region. To achieve the infrared multi-band absorption, we propose to synthesize a core-shell structure nanomaterial consisting of NaYF 4 :Yb 3+ , Er 3+ core and a layer of SiO 2 as shell. A series of NaYF 4 :Yb 3+ , Er 3+ nanocrystals were synthesized through hydrothermal method by adjusting the ratio of citric acid(CA)-to-NaOH, and the effects of CA concentration, and NaOH concentration were studied in detail. NaYF 4 :Yb 3+ , Er 3+ @SiO 2 nanoparticles were synthesized by sol-gel method using TEOS as silica source. The results show that the core-shell NaYF 4 :Yb 3+ , Er 3+ @SiO 2 nanoparticles were successfully synthesized. Up-conversion spectra of these nanoparticles were recorded with 980 nm laser excitation under room temperature. There are no changes of the emission centers of nanoparticles before or after silica coating, but the emission intensities of nanoparticles after silica coating are weakened. Furthermore, the property of infrared multi-band absorption was tested through ultraviolet-visible-near infrared spectrophotometer and infrared absorption spectra. The results illustrate that the multi-band infrared absorption nanomaterial was successfully synthesized.
研究领域:
材料科学
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纳米技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Lingyu Song,Yongbao Zhu,Jinfeng Wang,Tingxia Wu,Shuo Zhou,Xianbo Zhang,Junping Tang,Jikui Wang,Donghai Lin,Guosong Chen
The iron ion in industrial circulating cooling water is an important indicator for early warning of equipment corrosion and control level. It is interesting to construct an upconversion luminescence iron ion nanoprobe with a common inorganic phosphate water treatment agent. Herein, inorganic phosphate sodium hexametaphosphate (SHMP) was used to regulate the morphology and functionalization of NaYF 4 :Yb 3+ , Er 3+ upconversion luminescent nanoprobe (UCNPs) and applied to fluorometric detection of trace Fe(III) in water based on the fluorescence quenching which is caused by the selective coordination between hexametaphosphate on the surface of UCNPs and Fe(III). The structure, morphology, and luminous intensity of UCNPs were regulated by disodium hydrogen phosphate (ADSP), sodium tripolyphosphate (STPP) and sodium hexametaphosphate(SHMP). The UCNPs functionalized with SHMP has high sensitivity and selectivity for Fe(III) detection. The linear range and detection limit are 1.0–50 μM and 0.2 μM, respectively. The method has satisfactory results for the detection of trace Fe(III) in industrial circulating cooling water.
研究领域:
材料科学
·
分析化学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zhenlong Cheng,Mingzhou Meng,Xin Qiao,Yuanli Liu,Ute Resch-Genger,Jun Ou
Optical Thermometry is popular among researchers because of its non-contact, high sensitivity, and fast measurement properties. In the present experiment, Er 3+ /Yb 3+ /K + co-doped NaYF 4 nanoparticles with different K + concentrations were synthesized by solvothermal method , and the samples showed bright upconversion green emission under the excitation of a 980 nm laser. The powder X-ray diffractometer and transmission electron microscope were used to characterize the crystal structure and its surface morphology , respectively. The spectral characteristics of nanoparticles with K + doping concentration from 10% to 30% (Molar ratio) were investigated by fluorescence spectroscopy , and it was observed that the fluorescence intensity reached the maximum at the K + concentration of 20%, after which the intensity weakened when the K + content continued to increase. According to the dependence between the luminescence intensity of the sample and the laser power density and fluorescence lifetime , the intrinsic mechanism was carefully investigated. Temperature-dependent spectra of the samples were recorded in the temperature range of 315–495 K， and the maximum values of absolute sensitivity (S a ) and relative sensitivity (S r ) were measured at 0.0041 K −1 (455 K) and 0.9220%K −1 (315 K). The experimental results show that K + /Er 3+ /Yb 3+ triple-doped NaYF 4 green fluorescent nanoparticles (GFNs) have good prospects for applications in display devices, temperature sensing, and other fields.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
INFRARED PHYSICS & TECHNOLOGY
·
2024
·
IF 3.1
Yin Liu,Jie Wan,Yongbao Xiao,Dechao Yu
Glass forming regions of Al 2 O 3 -CaO-SrO (AlCaSr) system were systematically studied and clearly depicted by a combination of thermodynamic calculation method and traditional melt-quenching experiments. The glass forming region was first found with a composition range of Al 2 O 3 : 12–32 mol%, CaO: 43–68 mol%, and SrO: 20–36 mol%. Moreover, two representative glass compositions, 26.6Al 2 O 3 -49.4CaO-24SrO (AlCaSr-1) and 17.48Al 2 O 3 -58.52CaO-24SrO (AlCaSr-2), in central part of the experimental glass forming region and the corresponding glass doped with 1 mol% Er 2 O 3 , i.e., AlCaSr-1-Er and AlCaSr-2-Er, were selected and carefully prepared in our lab. Detailed investigations proved that the AlCaSr glasses had excellent comprehensive properties with high T g temperature (∼ 800 °C), wide transparency wavelength range (0.3–6 μm), and low maximum phonon energy (∼ 770 cm −1 ), and good 2.7 μm mid-infrared emitting properties via doping Er 3+ activators. These results highlight the potential application of AlCaSr glasses as infrared materials, and could benefit the development of high-performance infrared glasses.
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
·
2024
·
IF 5.8
Maohao Yang,Wanyin Ge,Peng He,Qian Zhang,Xin Xie
A simple and rapid grinding method for preparing Er 3+ -doped and Er 3+ /Yb 3+ co-doped Cs 3 Bi 2 Cl 9 upconversion phosphors was developed. We avoid to employ strong acids as reaction solvents, aligning with the principles of green chemistry. By controlling the thermal treatment temperature and adding BiCl 3 , a reversible phase transformation process between Cs 3 Bi 2 Cl 9 and Cs 3 BiCl 6 perovskite phosphors was achieved. The Er 3+ /Yb 3+ co-doped Cs 3 Bi 2 Cl 9 phosphors emit green light under 980 nm excitation, whereas Cs 3 BiCl 6 phosphors emit red light. Their temperature sensing performance was tested through variable-temperature processes. Compared to Er 3+ -doped Cs 3 Bi 2 Cl 9 phosphors, the co-doped Er 3+ /Yb 3+ phosphors have a higher relative sensitivity of 1.60 % K −1 . Compared to previously reported materials, Cs 3 Bi 2 Cl 9 phosphors show enhanced sensitivity in temperature sensing. The study demonstrates that lead-free halide perovskites’ unique color-tunability not only underscores the innovativeness of this synthetic strategy but also provides a significant technological foundation for temperature sensing applications. Given their environmental friendliness and facile preparation process, these phosphors possess notable advantages for industrial production and hold promise as potential candidates for next-generation high-performance phosphor materials.
研究领域:
材料科学
·
光学
·
化学
·
纳米技术
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产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 107
·62802-62808
·
IF 3.708
Yan Song,Guixia Liu,Xiangting Dong,Jinxian Wang,Wensheng Yu,Jingmei Li
Bifunctional hybrid nanocomposites based on upconversion luminescence and photothermal properties have a wide range of application, especially biomedical diagnosis and therapy. Herein, the hybrid nanocomposites were prepared via combining NaYF4:Yb3+,Er3+/Ho3+ nanocrystals as shell layer materials and Au nanoparticles as the cores. The as-prepared nanocomposites can simultaneously take advantage of both the upconversion luminescence of NaYF4:Yb3+,Er3+/Ho3+ nanocrystals and the photothermal transduction property of Au nanoparticles. The structure, morphology and composition of the nanocomposites were confirmed by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). In addition, the upconversion luminescence and photothermal transduction were evaluated. We observed an overlap between the absorption band of Au nanoparticles and the upconversion emission peaks of the Er3+/Ho3+ ions, and the luminescence resonance energy transfer (LRET) was studied and demonstrated. Under 980 nm laser irradiation, upconversion luminescence and efficient photothermal transduction of the hybrid nanocomposites were found. Moreover, the bifunctional nanocomposites also have shown excellent biocompatibility.
研究领域:
生物医学
·
材料科学
✓ 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）