CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Guangtao Lu,Yichao Wang,Kailin Ma,Xizhi Chen,Wanying Geng,Tianshuo Liu,Sai Xu,Jinsu Zhang,Baojiu Chen
The research of narrow band green emitter with excellent luminescent property is regarded as a very significant innovation direction for light-emitting diodes (LED) backlights in liquid crystal displays (LCDs). Herein, a high-efficiency near-ultraviolet (n-UV) excitation Mn 2+ doped green phosphor NaGa 11 O 17 : Mn 2+ phosphor is obtained based on the strong charge transfer absorption located in the n-UV region. The optimal sample exhibits a high color purity green light emission(≈89.7%) centered at 505 nm with a full width at half maximum (FWHM) around 29 nm. The absorption efficiency (AE), internal quantum efficiency (IQE) and external quantum efficiency (EQE) of optimal sample are 69.8%, 80.4% and 56.1%, respectively. In addition, the doping of Al 3+ significantly improves the thermal stability (26.9%–80.1% at 150 °C) by enhancing the electron recombination process. Using NGO: Mn 2+ and commercial β-sialon:Eu 2+ dual green phosphors as green component fabricated with BAM: Eu 2+ , KSF: Mn 4+ and 310 nm LED chips shows a wide color gamut of 125% NTSC. These findings suggest that our material may find use in LED backlights for liquid crystal displays and provide a meaningful reference for the development of new narrowband emitters.
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高影响因子
TALANTA
·
2017
·
IF 4.162
Liping Zhang,Bo Ling,Lun Wang,Hongqi Chen
An upconversion luminescence method was developed for the determination of glutathione (GSH), L -cysteine (Cys) or L -ascorbic acid (AA) based on redox reaction . We synthesized poly(acrylic acid) (PAA)-modified Mn 2+ -doped NaYF 4 :Yb,Tm upconversion nanoparticles (UCNPs), and the luminescence of these UCNPs was effectively quenched due to their carboxyl groups coordinating with Fe 3+ to form a UCNPs/Fe 3+ system. GSH, Cys or AA reduced Fe 3+ to Fe 2+ , which induced the luminescence recovery of the UCNPs. Under the optimized conditions, wide linear concentration ranges from 0.25-300 μM for GSH, 0.5–875 μM for Cys and 0.5–350 μM for AA were found, and the detection limits (3 S/K) were 0.2 μM, 0.5 μM and 0.2 μM, respectively. Thus, the UCNPs/Fe 3+ system was successfully applied for sensing GSH, Cys or AA.
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PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Huangyao Chen,Chonghui Qi,Xiang Guo,Jun Zhang,Chaoyong Deng,Ruirui Cui
In lead-free halide double perovskites, doping and alloying are key strategies for optical performance enhancement. However, achieving stable full-spectrum white emission in single-component phosphors remains challenging. Herein, high-quality single-phase white emission is realized in Cs2NaGdCl6 via Sb3+/Tb3+/Mn2+ codoping. Pristine Cs2NaGdCl6 shows a weak sky-blue emission, while Sb3+ doping significantly enhances the self-trapped exciton (STE) intensity. Density functional theory calculations show that Sb3+ doping creates new sensitizing states, boosting the STE emission. Under Sb3+ sensitization, STE energy transfers to Tb3+ and Mn2+. The incorporation of Tb3+ elevates the photoluminescence quantum yield from 0.66% (pristine) to 68.38% (CNGC: Sb3+, Tb3+), while the broadband red emission from Mn2+ plays a critical role in achieving full-spectrum coverage. Tunable white-light emission is achieved via a dopant ratio optimization. Combining the phosphor with a 340 nm commercial light-emitting diode chip produces a white light-emitting diode with a correlated color temperature of 4658 K and a color rendering index of 91.9. Temperature-dependent photoluminescence spectra confirm ratiometric sensing capability, yielding maximum relative sensitivities (Sr) of 1.06%/K (I463 nm/I608 nm) and 1.12%/K (I548 nm/I608 nm) at 298 K. These results demonstrate that this material exhibits multifunctional application potential in the fields of white-light illumination, optical thermometry, and fluorescent anticounterfeiting.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xintong Li,Xiaoya Li,Xin Ma,Zhanfang Cao,Hong Zhong,Shuai Wang
Manganese is a critical metal with widespread applications. The increasing demand for manganese, driven by the rapid growth of the electric vehicle and new energy sectors, has underscored the need for efficient separation and purification technologies, particularly from low-grade ores with high content of impurities. This study applies machine learning (ML) −driven quantitative structure–activity relationship (QSAR) modeling to investigate the Mn 2+ and Mg 2+ separation performance of 14 extractants. Key molecular descriptors were identified through principal component analysis and clustering heatmap method, and QSAR models were developed using ordinary least squares, nonlinear model, artificial neural network, random forest, and extreme gradient boosting (XGBoost) tree. The XGBoost model exhibited superior predictive accuracy for Mn 2+ and Mg 2+ extraction efficiencies and Mn 2+ /Mg 2+ separation selectivity. Feature importance analysis revealed that molecular properties related to hydrophilicity, electronic characteristics, and steric hindrance, as reflected by descriptors such as Clog P, OAV, Nonpolar S, VIP, Max P, and EI, play decisive roles in governing extraction efficiency and separation performance. Further NCI analysis demonstrated that the C–OH group of one α -hydroxyalkyl phosphinic acid ( α -HA) molecule forms a hydrogen bond with the C–OH group of another α -HA molecule, which likely accounts for the tendency of α -HA molecules to form dimers during solvent extraction. This interaction modulates the spatial arrangement of P–OH and P=O groups, enhancing both Mn 2+ extraction efficiency and Mn 2+ /Mg 2+ separation selectivity. These findings underscore the value of ML-driven QSAR modeling in predicting extractant performance, offering new mechanistic insights into Mn 2+ /Mg 2+ separation, and informing the development of novel extractants.
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Advanced Healthcare Materials
·
2022
·Vol. 11
·期 14
·2200665
·
IF 11.092
Bin Liu,Lili Feng,Yulong Bian,Meng Yuan,Yanlin Zhu,Piaoping Yang,Ziyong Cheng,Jun Lin
Enriching the application of multifunctional dendritic mesoporous organosilica (DMOS) is still challenging in anti-cancer research. Herein, manganese ions, iron ions, or cobalt ions and tetrasulfide bonds are co-incorporated into the framework of DMOS to yield multifunctional nanoparticles denoted as Mn-DMOS, Fe-DMOS, or Co-DMOS by directly doping metal ions during the synthetic process. Due to co-incorporation of metal ions and tetrasulfide bonds, these designed nanocarriers have more functions rather than only for cargo delivery. As proof of concept, the nanocomposite is established based on Mn-DMOS as an efficient nanocarrier for indocyanine green (ICG) delivery and modification with polyethylene glycol. In the tumor microenvironment, the generated hydrogen sulfide (H 2 S) arising from the reaction between tetrasulfide bond and over-expressed glutathione (GSH) causes mitochondrial injury to reduce cellular respiration. The released Mn 2+ from the rapidly decomposed nanocomposite catalyzes the endogenous hydrogen peroxide to produce oxygen (O 2 ). The photothermal effect from the released ICG initiated by the near-infrared light induces cancer cells apoptosis and simultaneously enhances the content of blood O 2 at tumor sites. Therefore, due to the GSH depletion and trimodal O 2 compensation, the photodynamic therapy efficiency of ICG has significantly improved. In brief, these designed nanocarriers will play advanced roles in cancer therapy.
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PubMed
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 26
·14037-14046
·
IF 6.895
Shenghui Zheng,Junpeng Shi,Xiaoyan Fu,Chengcheng Wang,Xia Sun,Changjian Chen,Yixi Zhuang,Xiaoyan Zou,Yuechan Li,Hongwu Zhang
In this paper, we have designed long afterglow luminescent MgGeO3:Mn2+,Yb3+,Li+ (MGO) nanoparticles in the first (NIR-I) and second (NIR-II) biological windows. Yb3+ ions served not only as the trap center to enhance the NIR-I long afterglow emission of Mn2+ at 680 nm, but also as an emitting center to produce a NIR-II long afterglow emission at ∼1000 nm. Furthermore, we have found the addition of Li+ can greatly increase the NIR-II afterglow emission of Yb3+ and the optimal amount of Mn2+, Yb3+ and Li+ was found to be 0.1, 0.5 and 0.5 mol%, respectively. The MGO nanoparticles synthesized using sol–gel methods showed a uniform morphology with a diameter of 50–100 nm, which were suitable for applications in bioimaging. More importantly, we have found MGO nanoparticles can be effectively excited to produce long persistent NIR-I and II luminescence using soft X-rays, suggesting that low dosage soft X-rays can also serve as a more powerful and deep tissue excitation source to recharge MGO nanoparticles. Furthermore, the MGO nanoparticles can also be re-excited to produce photo-stimulated emission under the irradiation of 650 and 808 nm NIR lasers. The in vivo imaging results have shown that MGO nanoparticles modified with folic acid (FA) can effectively realize super long-term targeted in vivo imaging of inflammation with a high sensitivity via recharging using soft X-rays and NIR lasers, which can provide not only an accurate diagnosis of inflammation, but also long-term monitoring of possible changes in the focus of inflammation in real time.
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高影响因子
Advanced Photonics Research
·
2022
·Vol. 3
·期 9
·2200069
·
IF 0
Congcong Huang,Decai Huang,Shouliang Xu,Jingrong Zhang,Sisi Liang,Jie Hu,Kunyuan Xu,Dejian Chen,Haomiao Zhu
The discovery of Eu 2+ -activated narrowband green phosphor is pivotal for wide gamut liquid crystal displays (LCDs) but facing a great challenge due to the broadband emitting nature of Eu 2+ ions. Alternatively, Mn 2+ ions can generate extremely narrow green emission band but suffering from their weak absorption. Herein, Eu 2+ ions with strong absorption are used to sensitize Mn 2+ ions in the Ba 0.75 Al 11 O 17.25 host. The Mn 2+ ions exhibit a green emission band peaked at 515 nm with an extremely narrow bandwidth of 27 nm. More importantly, the Eu 2+ ions show strong absorption at 340–380 nm and a blue emission band peaked at 450 nm with a relatively narrow bandwidth of 51 nm. Thus, the Ba 0.75 Al 11 O 17.25 : Eu 2+ , Mn 2+ phosphor can be used as a dual narrowband blue and green emitting phosphor with commercial ultraviolet diode chips excitation. Moreover, this phosphor exhibits impressive overall performance that fulfills the key standards of commercial phosphors, including high emission efficiency, excellent photoluminescence thermal stability, and outstanding chemical stability. The packaged light-emitting diode (LED) using 365 nm chips, Ba 0.75 Al 11 O 17.25 : Eu 2+ , Mn 2+ and K 2 TiF 6 :Mn 4+ phosphor generates a ultrawide color gamut of 121% National Television Systems Committee (NTSC) in Commission Internationale de l'Eclairage 1931 (CIE 1931).
研究领域:
材料科学
·
光电子学
·
荧光粉化学
·
显示技术
·
固态照明
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DOI
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Alimujiang Yalikun,Yanhong Wang,Yun Lv,Yaling Dou,Hyun-Joo Koo,Jiaojiao Cao,Wei Qi,Keke Huang,Myung-Hwan Whangbo,Zhongwen Ouyang,Hongcheng Lu
A series of analogous chain selenite chlorides Ba2M(SeO3)2Cl2 (M = Cu 1, Ni 2, Co 3, Mn 4) and Pb2Cu(SeO3)2Cl2 5 with tunable spin S from S = 1/2 to S = 5/2 have been hydrothermally synthesized and characterized. These analogues crystallized in the orthorhombic Pnnm space group (monoclinic P21/n space group for 5) all containing M2+–SeO3–M2+ spin chains, which are further separated by the Ba2+ ions (Pb2+ for 5). The magnetic susceptibility results of 1, 2, and 5 show broad maxima around 80.0, 18.9, and 78.0 K, respectively, indicating good one-dimensional (1D) magnetism. Meanwhile, no long-range order (LRO) is observed down to 2 K for both 1 and 5, while the isostructural compounds 2, 3, and 4 exhibit LRO at 3.4 K, 10.8 K, and 5.7 K, respectively, which are further confirmed by the heat capacity and electron spin resonance results, as well as the observed spin-flop transitions in the M–H curves measured at 2 K below TN. The magnetizations of 1–5 at 7 T are still far from saturation. In addition, thermal stability and FT-IR and UV–vis–NIR spectroscopy of 1–5 are reported.
研究领域:
无机化学
·
材料科学
·
固体物理
·
磁学
·
晶体学
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高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Diandi Li,Haijun He,Zhongxuan Xu,Hong Deng
Coexistence of chromium and iron, manganese and copper in industries is common, which may affect the microbial treating efficiency and toxicity to microorganisms, thus restricting the application of microbial treatment technology. In this research, Cu 2+ promoted the reduction of Cr(VI) and the fixation of total chromium in bimetallic systems for both Shewanella oneidensis MR-1 and Bacillus subtilis , while Mn 2+ and Fe 3+ exhibited inhibition effects. Generally, groups with coexisting heavy metal of 0.1 mM were most affected, no matter promotive or inhibitive. Toxicity analysis revealed that high concentration of heavy metal ions led to damage to the cell membranes and reduction of their survival rate. To clarify the optimal condition for microbial treatment, response surface methodology was used to investigate the influencing factors of Cr(VI) reduction by S. oneidensis . The total chromium concentration in the supernatant was correlated with three factors, and the significant order of influence was: culture time > culture temperature > pH.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 25
·11535-11544
·
IF 3.553
Zeng Tianbiao,Zhang Chuhong
An oxalate-based hydrothermal approach has been applied to synthesize Ni 0.8 Mn 0.1 Co 0.1 ·C 2 O 4 ·2H 2 O “mixed oxalate,” and “mixed oxalate” has been lithiated to LiNi 0.8 Mn 0.1 Co 0.1 O 2 for Li-ion batteries cathode. Ni 2+ , Mn 2+ and Co 2+ can be precipitated quickly and effectively at 100 °C within 20 min without inert gas protection, and it was not needed to control the pH of the solution deliberately. After the “mixed oxalate” was lithiated to LiNi 0.8 Mn 0.1 Co 0.1 O 2 , as-synthesized LiNi 0.8 Mn 0.1 Co 0.1 O 2 can deliver 160–180 mAh g −1 at 1C during long-term cycling and showed one of the best electrochemical performances compared to some Ni-rich or Ni/Mn/Co-contained cathodes synthesized by similar procedures, i.e., higher reversible capacity in rate charge/discharge cycles. Considering the facile synthesis of “mixed oxalate,” this work may give rise to an inspiration for LiNi x Mn y Co 1− x − y O 2 cathodes research.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Anqi Huang,Dan Zhi,Hongmei Tang,Li Jiang,Shuang Luo,Yaoyu Zhou
In this work, the removal of ciprofloxacin (CIP) was studied by electro-Fenton (EF) technique using different molar ratio of Mn 2+ /Fe 2+ based on a chemically modified graphite felt (MGF) cathode. The CIP removal efficiency reached 95.62% in 30 min and the removal efficiency of total organic carbon (TOC) reached 94.00% in 8 h under optimal conditions (50 mg/L initial CIP concentration, 400 mA applied current, 2:1 M ratio of Mn 2+ /Fe 2+ , and 3 initial pH value). A possible pathway of CIP degradation was supposed according to the analysis of the by-products detected during the EF process. An expanding experiment for CIP removal was also conducted by using acid mine drainage (AMD) rich in iron and manganese to replace the homogeneous solution in EF, and the CIP removal efficiency of 89.00% in 60 min under the optimal conditions may assign new perspectives for organic pollutants removals by utilizing AMD.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 86
·70238-70243
·
IF 3.84
Yu Chen,Jinhui Wang,Jing Li,Xinxin Li,Shuo Wei
The II–VI group/monoamine hybrid was a novel inorganic/organic (I/O) layered structure and it exhibited a strong quantum confinement effect and well-defined Mn2+-doped luminescence, which was imperative and valuable academically for its application. In this work, the pure and well-crystalline (ZnS:Mn)2·oa (oa = octylamine) hybrid was prepared by solvothermal synthesis and its thin films were fabricated by the drop-casting method. The 5 at% Mn2+-doped hybrid exhibited a strong Mn2+ luminescence at 597 nm with a 300 nm excitation. The inner filter effect (IFE) for this luminescence was investigated and verified by detecting three selected environmental contaminant species: n-butyl xanthate (BX), crystal violet (CV), and reaction black 5 (RB5), which indicated that this hybrid thin film had a good luminescence IFE-based linear response for the μM species solution. Furthermore, the 597 nm luminescence remained intact for the solution with a pH from 4 to 10 and the hydrophobicity of the hybrid thin film was favorable for its rapid and multiple IFE-based detection. Therefore, this hybrid thin film is a competitive candidate for the new-generational fluorescence sensors to probe the occurrence of these environmental contaminants.
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