Journal of Environmental Sciences
·
2018
·
IF 3.12
Can Wu,Yunyun Xu,Si Xu,Jingwei Tu,Chen Tian,Zhang Lin
In this work, zinc ferrite spinel with different zinc contents (Zn x Fe 3- x O 4 ) was synthesized by a hydrothermal method and used for removing As(V) in aqueous solution. X-ray diffraction (XRD) results indicated that in the crystal structure of Zn x Fe 3- x O 4 , the zinc atoms tended to occupy the octahedral sites for x < 0.6 and diffused into the tetrahedral sites gradually with x > 0.6. The size of Zn x Fe 3- x O 4 crystallites increased with the increasing zinc content. Batch adsorption experiments showed that the adsorption isotherms could be well described by the Langmuir model, while the adsorption kinetics followed the pseudo-second-order kinetic model. Zinc ferrite exhibited the highest adsorption capacity towards As(V) when x = 0.6. Study of the mechanism indicated that doping with zinc increased the number of surface hydroxyl groups on ferrite spinel, and thus enhanced the adsorption capacity when x = 0.6. This work revealed the effects of doping site and content of metal atoms on the adsorption ability of ferrite spinel towards As(V).
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Horizons
·
2025
·
IF 10.7
xuesong wang,Yao Xiao,Puxian Xiong,pan zheng,Sheng Wu,Zhiyao Zhou,Binli Xiao,Peishan Shao,meihui zhang,jianhui liu,Jiulin Gan,yan qang,Qi Qian
Near infrared mechanoluminescence (NIR-ML) materials have attracted the attention of researchers due to their unique advantages, such as high resistance to bright-field interference and higher penetration depth into biological tissues. However, the reported NIR-ML materials are mainly focused on rare ion activated narrow-band emission ones. In this work, we report a NIR-ML material of BaGa12O19:Cr3+ by solid state rection method. The bright broad NIR ML (650-1000 nm) is observed at lower force loads (12N), which is based on the Cr3+ ion’s multi-lattice site occupation. After heat treatment at 573 K for 20 min, BaGa12O19:Cr3+ still maintains 84.4% of its ML intensity. Furthermore, the ML intensity of BaGa12O19:Cr3+ is also significantly improved after UV pre-irradiation. Due to the defective piezoelectric photonic effect, BaGa12O19:Cr3+ has great self-recoverable properties even in the absence of UV and sunlight irradiation. Finally, the ML penetration rate of BaGa12O19:Cr3+ has reached as high as 66.97% in biological tissues, which suggests a potential prospect for biostress detection towards bio-imaging applications.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 6
·2375-2388
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IF 6.4
Shaoshan Su,Wei Song,Hongli Wen,Zhurong Mo,Tonghua Wan,Lin Yu,Weiren Zhao,Deshmukh Abdul Hakeem
KYb2F7 nanocrystals have stimulated extensive research interest due to their unique structure and tunable upconversion (UC) properties for the development of different technological applications. Herein, the controlled synthesis of KYb2F7:Er3+ nanocrystals for precise control over the crystal phases and morphologies was realized by varying the KF dose and reaction time via a facile hydrothermal method. Upon 365 nm excitation, the downconverted red emission of the KYb2F7:Er3+ nanocrystals pre-excited with the 980 nm laser was significantly enhanced. By manipulating the KYb2F7:Er3+ host structure via substitution of cations such as Ca2+, Ti4+, Si4+, Ge4+, Y3+, and Nd3+ for Yb3+ with optimized concentrations, the thermometric properties of KYb2F7:Er3+ were greatly improved. The substitution of Ti4+, Ge4+, and Y3+ has significantly improved the SR (for Ti4+ both SA and SR are improved). The highest SA (0.0028 K−1) and SR (1158/T2 K−1) were obtained for KYb1.8Ti0.15F7:Er3+ and KYb1.8Ge0.15F7:Er3+, respectively. The mechanistic investigations revealed that the green and red UC emissions resulted from the three- and two-photon process, respectively. We believe that the substitution strategy could be a powerful tool for enhancing the thermometric properties of luminescent materials.
研究领域:
材料科学
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纳米技术
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光学材料
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温度测量
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 35
·期 2
·2412480
·
IF 18.5
Ming Zhao,Yeping Ge,Yurong Li,Xiaoyan Song,Xinping Zhang
The advancement of Eu 2+ -activated luminescent materials tailored to exhibit a range of properties is crucial for addressing the specific demands of various application fields. However, the lack of suitable lattice sites in numerous compounds for stable Eu 2+ incorporation restricts their potential for diverse optical properties. Herein, a facile strategy of carbon and hydrogen coreduction utilizing graphite crucibles is proposed to effectively achieve the impressive luminescence of Eu 2+ at trivalent Y sites in Rb 3 Y(PO 4 ) 2 :Eu phosphors. Rb 3 Y(PO 4 ) 2 :Eu exhibits blue-violet emission when Eu 2+ predominantly occupies the Rb1 and Rb2 sites. Inspiringly, by facilitating the reduction of more Eu 3+ to Eu 2+ , a yellow emission band at 550 nm arising from Eu 2+ at Y sites emerges, enabling the realization of single-component white-emitting and yellow-emitting Rb 3 Y(PO 4 ) 2 :Eu phosphors. The diverse luminescent properties of Rb 3 Y(PO 4 ) 2 :Eu expand its potential applications in different white light source devices and optical thermometry. This work presents an innovative synthetic strategy to develop remarkable Eu 2+ luminescence at trivalent cation sites, thereby broadening the optical properties of the material and enabling multifunctional applications.
研究领域:
材料科学
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发光材料
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固态化学
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光学性质
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荧光粉技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）