APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Liming Zhao,Carl Redshaw,Kuixing Ding,Pengyue Zhang,Bin Chen,Zhirong Chen,Jiugang Hu,Haohong Li
Metal organic frameworks (MOFs) contain ordered pores capable of encapsulating varied types of guests and provide a platform to expand the flexibility and versatility of the host-guest composites. Herein, by encapsulating CH 3 NH 3 PbBr 3 NP S into Ln-MOFs (Ln = La, Nd, Pr, Sm), four CH 3 NH 3 PbBr 3 @Ln-MOFs host-guest composites were fabricated and served as a bifunctional platform. The temperature-dependent luminescence properties of the CH 3 NH 3 PbBr 3 @Ln-MOFs were explored and the results revealed their tuneable green luminescence performance. In particular, the CH 3 NH 3 PbBr 3 @Sm-MOF exhibits a variety of colours from green to blue to purple and an excellent quantum yield of 0.98. The photocurrent responses and theoretical calculations reveal the enhancement mechanism of CH 3 NH 3 PbBr 3 on charge-hole separation owing to its unique host-guest synergy. Moreover, the CH 3 NH 3 PbBr 3 @Sm-MOF exhibits the excellent electrical bi-stability with a high ON/OFF ratio of 10 4 . Hence, the CH 3 NH 3 PbBr 3 @Ln-MOFs host-guest composites are promising candidates for a new generation of photovoltaic, light-emitting, and switching memories devices.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2022
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IF 3.428
Baoqin Mu,Bin Li,Bin Qi
Lanthanide metal–organic framework Ln-MOFs(Ln = Sm, Dy, Dy/Sm) were synthesized by hydrothermal method at 100 °C for 12 h using lanthanide metals (Ln = Sm, Dy, Dy/Sm) as metal ion centers and 1,3,5-benzotrioic acid (H 3 BTC) as ligands. The structural characteristics of Ln(BTC)(H 2 O)·(DMF) were characterized by X-ray Diffraction(XRD), Fourier Transform Infrared Spectroscopy(FT-IR) and Thermogravimetric Analysis(TGA). Scanning electron microscopy showed that the samples showed rod-like morphology, and the fluorescence spectra showed 478 nm and 573 nm corresponding to the characteristic transitions of 4 F 9/2 → 6 H 15/2 (blue light) and 4 F 9/2 → 6 H 13/2 (yellow light) of Dy 3+ , respectively, while orange light at 600 nm and red light at 646 nm corresponded to the characteristic transitions of 4 G 5/2 → 6 H 7/2 and 4 G 5/2 → 6 H 9/2 of Sm 3+ , demonstrating that the double-doped lanthanide metal ions MOF were successfully synthesized. H 7 (P(Mo 2 O 7 ) 6 )/(Dy/Sm-MOF) was used as a sensor for the determination of H 2 PO 4 − , the results of performance evaluation showed that the electrochemical sensor showed a linear relationship between 0.01 and 0.17 mM for H 2 PO 4 − , with a detection limit of 0.005 mM/L, good stability and reproducibility, which opened up a new way for the detection of orthophosphate dihydrogen.
研究领域:
分析化学
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材料科学
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电化学
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无机化学
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传感器技术
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2026
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IF 3.8
Jianwei Guo,Rong Shan,Hongjun Li,Hai Guo
X-ray imaging demonstrates tremendous application potential in medical diagnosis, security screening and other relevant fields. As core functional materials for X-ray imaging, recent scintillators generally suffer from complicated fabrication processes, environmentally unfriendly or energy-intensive experimental procedures, and insufficient environmental stability. Herein, we used a facile, green, and low-cost synthetic method to construct water-stable lanthanide MOFs based scintillators (named Ln-BTC) toward underwater X-ray imaging. Tunable photoluminescence and X-ray excited luminescence can be realized in Ln-BTC by regulating the doping ratios of Tb 3+ and Eu 3+ ions. Tb-BTC preserves identical crystal structure and optical properties after 20-times and 50-times raw-material scale-up. It shows good radio-luminescent properties, including high relative light yield (max ∼ 18,400 photons MeV −1 ) and excellent linear X-ray response ( R 2 = 0.99). Besides, it presents good underwater irradiation stability (intensity > 84% after X-ray irradiation with total dose up to 215 Gy air ) and no significant structural degradation occurs after 20 days of storage in air and municipal water. MOFs-based mixed matrix membranes display good spatial resolution for underwater radio-imaging (max ∼16 lp mm −1 ). This work provides effective methods for the development of underwater X-ray imaging.
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
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2014
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IF 1.342
Xiang LIU,Jingyan WANG,Qingyuan LI,Sai JIANG,Tianhao ZHANG,Shengfu JI
The rare earth metal-organic frameworks (Ln-MOFs) materials, Ln(BTC)(H 2 O)·(DMF), were synthesized using the rare earth metal (Ln=Sm, Eu, Tb, Y) and 1,3,5-trimesic acid (BTC) as a metal ion center and ligand, respectively. X-ray diffraction (XRD) and infrared spectroscopy (FT-IR) were employed to characterize the Ln-MOFs structural features. The property of adsorption desulfurization of Ln-MOFs materials was evaluated with thiophene/n-octane as model oil. The results showed that Ln-MOFs with rare earth metals Sm, Eu, Tb and Y had perfect crystalline and good adsorption desulfurization ability. Y(BTC)(H 2 O)·(DMF) material had a comparatively better activity for the adsorption desulfurization with desulfurization rate up to 80.7% and the sulfur adsorption capacity was found 30.7 mgS/g(Y-MOFs). The Ln-MOFs materials had excellent reusability.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）