Science China-Materials
·
2020
·Vol. 64
·期 4
·931-941
·
IF 6.098
Chen Wenwei,Zhuang Yixi,Chen Changjian,Lv Ying,Wang Ming-Sheng,Xie Rong-Jun
Metal-organic frameworks (MOFs) and mechanoluminescent (ML) materials have been considered as two types of promising materials that have their own application fields. It would be amazing to endow one material with the advantages of ML and MOFs, thus broadening their applications. However, there are quite few investigations on this topic, and the ML mechanism in ML-MOFs remains unclear. In this study, we proposed a strategy for developing ML-MOFs by doping lanthanide ions into the non-centrosymmetric SBD ([Sr(μ-BDC)(DMF)] ∞ ) MOF, and successfully synthesized a series of lanthanide-doped MOFs Ln-SBD (Ln = Tb, Dy, Sm, Eu) and Tb 1− x Eu x -SBD ( x = 0.2, 0.4, 0.6, 0.8) with multicolor ML. The lanthanide ions were uniformly distributed in the matrix of the SBD-MOF, and occupied the Sr site. The MLMOFs exhibited intense multicolor ML emissions varying from green to yellow to red by changing the co-doping ratios and species of lanthanide ions. The similar ML and photoluminescence (PL) spectra indicated that the ML emission was assigned to the radiative transition from the excited states to the ground states of lanthanide ions. The radiative transition was induced by the electron bombardment process that originated from the piezoelectric effect of the non-centrosymmetric SBD host. In addition, a pioneering temperature sensing research based on ML was carried out, which is promising for realizing dual-functional detection of stress and temperature without excitation light sources. This study gives a unique insight for developing more versatile and interesting smart materials by combining the versatility of MOF with the ML emission, imparting additional values to both MOF and ML materials. Moreover, this study provides a general rule for selecting MOFs with an acentric structure as the host for ML materials.
研究领域:
材料科学
·
无机化学
·
功能材料
·
传感器
·
纳米科技
✓ 已验证
DOI
高影响因子
Advanced Powder Materials
·
2021
·
IF 0
Shaoju Jian,Zhiwei Tian,Jiapeng Hu,Kaiyin Zhang,Lin Zhang,Gaigai Duan,Weisen Yang,Shaohua Jiang
A series of La-doped ZnO (La/ZnO) nanofibers were prepared by electrospinning-calcination technology and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), ultraviolet–visible (UV–Vis) absorption spectroscopy and specific surface area analysis. The effect of numerous operational parameters involving calcination temperature, La doping amount, La-doped ZnO concentration and initial Rhodamine B (Rh B) concentration on photocatalytic efficiency of the composite has been analyzed by using Rh B for degradation under the illumination of visible light. Under optimum conditions, ZnO doped with 1.5 at.% La achieved 94.31% Rh B degradation after 510 min of visible light illumination. The kinetic data of La/ZnO catalyst for Rh B photodegradation fitted the Langmuir-Hinshelwood first-order (LHFO) kinetic model well.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Zhenhua Li,Yi Shui,Zhengli Liang,Lehui Liu,Jiahao Wan,Xingxing Jiang,Zheshuai Lin,Hongming Liu
For nonlinear optical crystals, the existence of atomic disorder within the structure may lead to deterioration or instability in optical performances. Herein, the lanthanide contraction effect was implemented to modulate the structure, atomic disorder, and optical properties of a series of novel lanthanide-based polyiodates, namely, REI5O14 (RE = Eu, Er, Tm, Yb). Among them, EuI5O14 crystallizes to an acentric space group (Cm) and exhibits a strong second harmonic generation (SHG) response (15 × KH2PO4@1064 nm) but contains severe atomic disorder. When the central lanthanide comes into contact with Er3+, Tm3+, and Yb3+, the smaller ionic radius changes the space group into Pmn21 and eliminates the atomic disorder. For the first time, it is discovered that the lanthanide contraction effect possesses the function of eliminating atomic disorder. Simultaneously, REI5O14 (RE = Er, Tm, Yb) preserve the privileged layered framework and the large nonlinear coefficient of EuI5O14, with an SHG response of 15 × KH2PO4@1064 nm for TmI5O14 and 9.5 × KH2PO4@1064 nm for YbI5O14. Systematical property comparison reveals that their stability in air and water is inextricably linked to their structural evolution. Our work provides a feasible route to gain new nonlinear optical materials with great application potential without atomic disorder.
研究领域:
材料科学
·
晶体学
·
光学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Keyi Sun,Yuxuan Liu,Wenbin Fei,Yian Wang,Huazhang Guo,Kexin Rao,Mengting Deng,Yulei Sui,Ling Wu
Na 4 MnCr(PO 4 ) 3 , a manganese-based NASICON-type phosphate cathode material, is attracted considerable attention due to its high voltage and energy density. However, its practical application is hindered by poor electronic conductivity and inferior sodium ion diffusion kinetics. In this study, trace La 3+ is utilized to optimize the lattice structure of Na 4 MnCr(PO 4 ) 3 due to its unique energy level structure. La 3+ doping significantly enhances the local environment of the Mn-O bond and stabilizes the lattice structure by improving covalency, thereby mitigating Mn dissolution during charge–discharge cycles. Additionally, the large ionic radius of La 3+ promotes the sodium ion transport kinetics by expanding the cell volume and facilitating rapid sodium storage. As a result, the optimal Na 4 MnCr 0.995 La 0.005 (PO 4 ) 3 /C sample demonstrates an impressive initial discharge specific capacity of 124.5 mAh g −1 at 0.1C and superior cycling stability with a capacity retention of 70.2 % after 500 cycles at 5C. Furthermore, density functional theory calculations indicate that La 3+ doping can enhance conductivity and reduce the energy barrier for sodium ion diffusion. This study presents an effective and cost-efficient doping strategy for modifying high-energy density NASICON-type phosphate cathode materials, showing promising potential in the field of sodium ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机固体化学
·
计算材料学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2012
·Vol. 41
·期 28
·8567-8574
·
IF 3.838
Qiu-Ping Li,Bing Yan
Luminescent mesoporous materials were prepared by performing an anion metathesis reaction on ionic liquid modified SBA15, which has imidazolium chloride bridging units. The lanthanide β-diketonate complex anion was successfully anchored onto the SBA15 framework after the anion metathesis reaction. The resulting materials were characterized by FTIR, TEM, TGA, small-angle X-ray powder diffraction (SAXRD) and nitrogen adsorption–desorption isotherms. The photoluminescent properties of these materials were investigated in detail, and the results reveal that these hybrid mesoporous SBA15, prepared through this preparation approach, present favorable photoluminescent behavior such as high luminescent quantum efficiencies and long luminescent lifetimes.
研究领域:
材料化学
·
无机化学
·
光功能材料
·
纳米材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 51
·期 12
·16749-16757
·
IF 5.1
Yihan Liu,Yingjie Mao,Zhichao Zhang,Kai Liu,Denghui Xu,Jun Zhou
Lead-free double perovskites (DPs), characterized by their low toxicity, broad emission spectra and excellent stability, have emerged as highly promising doped hosts with significant potential for visible light applications. However, achieving rich and distinctive multiple photoluminescent (PL) emission through doping with various lanthanide (Ln 3+ ) ions remains a formidable challenge. In this work, we explored the luminescent properties of Cs 2 KInCl 6 , which exhibits intrinsic broad self-trapped excitons (STEs) emission centered at 500 nm. By doping Ln 3+ ions (Dy 3+ , Sm 3+ , and Tb 3+ ) into Cs 2 KInCl 6 , multiple emission could be realized, along with energy transfer (ET) from the intrinsic STEs to Tb 3+ and Sm 3+ ions. Notably, the incorporation of Tb 3+ ions enhanced exciton-phonon coupling and lattice vibrations , resulting in strengthened STEs emission. Furthermore, tunable emission from green to yellow was achieved through multiple ET processes in Cs 2 KInCl 6 :Tb 3+ ,Sm 3+ by co-doping Tb 3+ and Sm 3+ . This work not only offers new insights into enhancing STEs emission in DPs, but also imparts Cs 2 KInCl 6 with tunable PL properties, which makes it a promising candidate for multicolor light-emitting devices.
研究领域:
材料科学
·
光物理学
·
无机化学
·
发光材料
·
半导体材料
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Xindong Wang,Yiying Yang,Jing Dong,Feng Bei,Shiyun Ai
A novel and sensitive colorimetric sensor for determination of methyl parathion (MP) was developed based on a lanthanum (La 3+ ) functionalized gold nanoparticles (Au NPs-La) probe. In this assay, a new type of crosslinking molecule-La 3+ , possessing strong coordination effect on oxygen-containing functional groups, was first applied in the Au NPs-based colorimetric assay. On account of the oxygen-containing thiophosphate, MP could combine with La 3+ and induce the aggregation of Au NPs-La probes through coordination–bonding interactions, resulting in a variation of the solution color from red to blue. Further, the color change was in situ monitored with ultraviolet visible (UV–vis) spectrophotometer for the quantitative detection of MP. In contrast with the commonly designed Au NPs-based colorimetric assays, a novel Au NPs-La probe, which equipped with the same type of binding sites with Au NPs and analyte molecules, was explored and used for optical detection of MP. Under optimized conditions, the colorimetric assay exhibited a linear correlation to the concentration of MP in the range from 0.5 nM to 0.5 μM with a detection limit of 0.1 nM (S/N = 3). The developed sensor is simple, without using complicated instruments, and has enormous potential applications in rapid and on-site monitoring for MP in real samples.
研究领域:
分析化学
·
纳米生物技术
·
环境监测
·
食品安全
·
分子识别
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Peng Zhao,Nengjie Feng,Bangjie Tan,Zhuobin Huo,Geng Liu,Hui Wan,Guofeng Guan
The exposed crystal facets are crucial to heterogeneous catalysis . Herein, the facet controlled Ce 1−x La x O δ (0 ≤ x ≤ 0.30) nanocomposites have been constructed elaborately via a hydrothermal route and used for soot abatement. The catalysts were characterized by XRD , TEM, Raman, FT-IR, XPS , H 2 -TPR, and so forth. With the increasing content of La 3+ , part of CeO 2 crystals transformed from nanocubes to nanorods , inducing distinct effects on the catalytic activity . When the concentration of La 3+ was lower than 10 %, the exposed facet in the catalyst was (200). After La 3+ were further introduced, the facet degraded to (111). La 3+ at low concentration would enhance activity by facilitating lattice oxygen delivery and inducing abundant surface oxygen species, especially O - , which were vital to surface sensitive soot oxidation . Nevertheless, excessive La 3+ ions would inhibit CO 2 desorption due to the generation of La 2 O 2 CO 3 , a strong alkali as a result of phase separation. Among all the catalysts, Ce 0.95 La 0.05 O δ showed the best catalytic performances for soot combustion, with T 50 of 375 °C.
研究领域:
材料化学
·
环境催化
·
纳米材料
·
能源化学
·
表面科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Erbing Hua,Shu Jin,Xiaorong Wang,Shuang Ni,Gang Liu,Xiaoxiang Xu
In this work, novel 2D type-II p-n heterojunctions La 2 Ti 2 O 7 /In 2 S 3 have been fabricated. The heterojunctions exhibit much improved photocatalytic activity over individual moieties and their physical mixtures in which 18-fold increment in hydrogen production has been achieved under visible light illumination (λ ≥ 400 nm). Their superior activities stem from intimate face-to-face contact between La 2 Ti 2 O 7 and In 2 S 3 in the heterojunctions which guarantee facile charge interchange. Photoelectrochemical analysis suggests that efficient charge separations occur at the interfaces of the heterojunctions and contributes to a prolonged charge lifetime as well as the much enhanced photocatalytic activities. Such a simple strategy by fabricating ultrathin type-II p-n heterojunctions also warrant promising applications in other areas such as optoelectronics, sensors etc. whereby efficient charge separations are needed.
研究领域:
材料化学
·
光催化
·
纳米材料
·
能源科学
·
半导体物理
·
环境催化
·
可持续能源
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 20
·8314-8320
·
IF 1.938
Zhuo Guo,Yin Lu,Jian Li,Xian-feng Xu,Guo-qing Huang,Ze-yu Wang
A nano-complex of graphene and La(OH)3 nanowires (GR–La(OH)3) was prepared for the fabrication of a voltammetric sensor, which was used to simultaneously determine the two isomers of dihydroxybenzene, hydroquinone (HQ) and catechol (CC). The modified electrode exhibited excellent sensitivity and selectivity in the determination of HQ and CC mixed in a 0.1 M Na2HPO4–C4H2O7 buffer solution (pH 4.0). Both HQ and CC appear to be a pair of quasi-reversible redox peaks and the potential difference between oxidation peaks of HQ and CC was 112 mV. Under the optimized conditions, the oxidation peak current of both HQ and CC was linear in the range of 5 to 300 μM in the presence of 50 μM of the other one in the solution. The detection limit was found to be 0.015 μM for HQ and 0.01 μM for CC (S/N = 3). The proposed method was further successfully applied to the simultaneous determination of HQ and CC in artificial wastewater samples, and the results showed good stability and high reproducibility.
研究领域:
分析化学
·
环境监测
·
电化学
·
纳米材料
·
传感器技术
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2024
·
IF 1.2
Mengmei Yin,Kangrui Yuan,Zhengqi Lv,Yiwen Yuan,Xichen Feng,Qinghua Wu
Lanthanide luminescent materials have rapidly emerged as potential candidates in the fields of drug delivery and bioimaging. In this study a spherical composite material theory with uniform particle size, good biocompatibility, fluorescence emission performance and an efficient targeted drug delivery system was proposed. To achieve this, a facile ultrasonic atomization approach to synthesize sodium alginate-lanthanum (SA-La) cross-linked microspheres at room temperature was developed, and then they were loaded with doxorubicin (DOX), yielding DOX@SA-La for targeted liver cancer cell treatment. Fluorescence studies indicated that the SA-La microspheres exhibited excellent fluorescence properties with intense blue fluorescence emitted. Moreover, the ability of drug release in-vitro of the SA-La and Calcium alginate (SA-Ca) microspheres were proved by UV-visible spectrophotometry, and the drug release values of these two drug carriers were considerable. In addition, cytotoxicity tests via the CCK-8 assay revealed that the DOX@SA-La delivery system considerably inhibited hepatocellular carcinoma cells growth. Conclusively, the SA-La fluorescent microsphere drug carriers enables real-time anti-cancer efficacy observations and analyses, having promise as a potent therapeutic and diagnostic tool for liver cancer treatments and drug tracing in the tumors.
研究领域:
药学
·
材料科学
·
生物医学工程
·
肿瘤学
·
生物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Xuewen Zheng,Ting Yang,Jianghai Wei,Chengyang Wang,Mingming Chen
Solid electrolytes have been actively researched for rechargeable lithium batteries , but low ion conductivity ( σ ) and the growth of lithium dendrites hinder their practical applications. This study synthesizes a composite solid electrolyte combining polyethylene oxide (PEO) with Li 7 La 3 Zr 2 O 12 nanofibers (LLZO NFs) and quenching in liquid nitrogen . The LLZO NFs efficiently increase the σ and mechanical strength of composite polymer electrolytes (CPEs), thereby promoting the uniform deposition of lithium metal and inhibiting the growth of lithium dendrites. More importantly, the quenching markedly reduces the crystallinity of the electrolyte, which further enhances the ionic conductivity even at 30 °C. The CPEs exhibit high σ (1.09 × 10 −4 S cm −1 at 30 °C) and enlarged electrochemical window (up to 5 V vs . Li/Li + ). An integrated all-solid-state lithium metal battery (ASSLMBs) (labeled as LiFePO 4 |PEO/LLZO NFs/LiTFSI- q |Li) delivers high initial discharge capacity (138.8 mAh g −1 ) and excellent cycling stability (74.8% at 0.5C after 300 cycles) with remarkable capacity retention (84.0% at 1C after 200 cycles) at 45 °C. This strategy enables the promotion and application of ASSLMBs at room temperature.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）