ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xiangyu Tian,Zixu Zeng,Yi He,Lecheng Lei,Chunlin Yu,Xingwang Zhang
The utilization of TiO 2 for the fabrication of transparent photochromic materials is both cost-effective and environmentally friendly. However, it still poses challenges due to the rapid recombination of electron-hole pairs and poor organic-inorganic compatibility. Oxygen vacancies play a crucial role in sustaining sacrificial electron donors for hole scavenging, demonstrating great potential in enhancing photochromic performance. Herein, Rb doping and lattice strain are applied to synergistically engineer oxygen vacancies, considering lattice oxygen release is influenced by charge neutrality and oxygen atom coordination environment. Furthermore, the particle surface is modified using composite siloxanes to ensure monodispersion and enhance organic-inorganic compatibility. Structural analyses and theoretical calculations indicate that Rb doping and epitaxial strain synergistically reduce the oxygen vacancy formation energy and promote the chemical adsorption of diethylene glycol (DEG) on the TiO 2 surface for hole scavenging. The designed DEG-added Rb-TiO 2 /TB-CS (TB means extra titanium butoxide, CS means composite siloxanes) nanodispersion exhibits a significant optical modulation amplitude exceeding 90% at 650 nm, rapid response within 60 s, and stable reversibility in color-switching (50 cycles). Moreover, utilizing Rb-TiO 2 /TB-CS with DEG ligands as a responsive material enables the fabrication of transparent photochromic polyacrylate-based hybrid films, polyvinyl alcohol-based hydrogels, and hydroxyethyl cellulose-based rewritable papers, showcasing its immense potential for diverse applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Jingyi He,Shimin Liu,Jianmin Gu,Shiqing Xu
All-inorganic lead halide perovskite quantum dots (CsPbX3 QDs, X = Cl, Br, I) glass has elicited extensive attention due to its excellent stability. However, the realization of CsPbX3 QDs glasses with a high photoluminescence quantum yield (PLQY) remains a challenging task. In this study, Eu3+ ions act as nucleating agents to promote the formation and crystallization of CsPbBr3 QDs. Rb+ ions further improve the crystallization quality and reduce the defects between CsPbBr3 QDs and the glass interface. The codoping of Eu3+ and Rb+ ions greatly improved the PLQY of CsPbBr3 QDs. The highest PLQY is achieved in the 0.33Rb-2Eu heat-treated at 500 °C–6 h, reaching 54%. Furthermore, among the light-emitting diodes (LEDs) prepared with 1Cs-0Eu, 1Cs-2Eu, or 0.33Rb-2Eu, 0.33Rb-2Eu has the highest color gamut coverage (108.9% of the National Television Standards Committee color gamut and 92.7% of Rec. 2020 color gamut at 20 mA) and the strongest durable high-power driving capability, making it an ideal material for green LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Quanfang Lu,Hui Luo,Jie Yu,Yuejing Kang,Zhuanhong Lu,Juanlong Li,Wu Yang
A simple sample introduction system has been successfully developed, and then integrated with liquid cathode glow discharge (LCGD) to form atomic emission spectrometry (AES) for the detection of rubidium (Rb), cesium (Cs) and strontium (Sr) in water samples by using a fiber-optic spectrometer, in which a buffer bottle was employed to improve the stability of microplasma, and a six-port valve equipped with sample loop was used to reduce the sample consumption and enhance the analytical precision and speed. The effects of flow rate, discharge voltage, supporting electrolyte and solution pH on signal intensity were examined systemically. The matrix interferences of major cations and anions in aqueous solution were also evaluated. The results indicated that the optimal operating conditions are 2.4 mL min −1 flow rate, 660 V discharge voltage and pH = 1.0 HNO 3 as supporting electrolyte. Only Al 3+ ions interfere with the determination of Rb, Cs and Sr. The limits of detection (LODs) of Rb, Cs and Sr are 0.18, 0.17 and 0.21 mg L −1 , respectively, which are basically inferior to those of the closed-type electrolyte cathode atmospheric discharge (ELCAD). The relative standard deviation (RSD) is 2.7% for Rb, 2.0% for Cs and 2.5% for Sr, the correlation coefficients ( R 2 ) of Rb, Cs and Sr are over 0.999, and the power is below 50 W. The measured results of Rb, Cs and Sr are in agreement well with the spiked values, and the satisfactory recoveries of standard addition are obtained between 97 and 111%. The advantages of small size, low sample and power consumption and high stability suggested that the LCGD-AES is a promising technique for the detection of Rb, Cs and Sr in water samples.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2019
·
IF 2.29
Yanfei Fan,Dongdong Li,Dandan Gao,Dewen Zeng,Wu Li
Specific heat capacity of Rb 2 SO 4 (aq) and Cs 2 SO 4 (aq) solutions was determined using a Calvet-type calorimeter from 288.15 K to 338.15 K and from about 0.25 mol·kg −1 to concentration near room temperature solubility limits. For both Rb 2 SO 4 (aq) and Cs 2 SO 4 (aq) solutions, the specific heat capacity decreases with the increase of molality at constant temperature. Combining the heat capacity data determined in this study and other thermodynamic properties ( i.e. water activity, osmotic coefficient, mean ionic activity coefficient, enthalpy of dilution and solubility) reported in literature, thermodynamic and phase equilibria properties of the binary Rb 2 SO 4 + H 2 O and Cs 2 SO 4 + H 2 O systems were modelled using a comprehensive thermodynamic framework, in which a Pitzer-Simonson-Clegg model was applied to represent the non-ideality of aqueous phases. The models can represent all the properties over wide temperature and concentration ranges. This study forms a basis for solubility prediction in multi-component systems containing Rb and Cs sulfates.
研究领域:
物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Peijun Liu,Guan-Ping Jin,Yibo Fu,Bolin Liu,Xu Zhang,Huaitao Jiang
The development of extraction methods for rare and valuable rubidium (Rb) from the aqueous phase remains a challenge today. In this work, based on the promising physicochemical properties of polysulfone (PSF), the strong binding ability of zeolitic imidazolate framework-8 (ZIF-8) to Cu2+, as well as the excellent adsorption ability of potassium copper hexacyanoferrate (KCuFC) toward Rb+, a novel PSF/ZIF-8@KCuFC composite membrane was developed. The prepared composite membrane was applicable for efficient separation of Rb+ from the aqueous solution. The theoretical maximum adsorption capacity of Rb+ could reach 204.45 mg/g at 45 °C. The composite membrane possessed remarkable desorption and regeneration properties, which were demonstrated by a 0.5 mol/L NH4Cl/HCl solution and six adsorption/desorption cycles, respectively. Furthermore, the PSF/ZIF-8@KCuFC composite membrane could still uptake Rb+ with good effect from actual salt lake brine, and the recovery efficiency was maintained at about 38% during ten adsorption/desorption processes.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Chao Yu,Jian Lu,Zhiqiang Hou,Zhongfei Ma,Xinyu Lin,Zeqing Dong,Wendong Xing,Yongsheng Yan,Yilin Wu
Exposure and distribution of recognition sites are critical for membrane separation materials to enhance adsorption and separation efficiency toward rubidium ion. Herein, we prepared the rubidium (Rb) ion separation membranes (Rb-ISMs) through a delayed phase inversion method taking advantage of the different polarities between ethanol and water. Fabrication process was conducted through immersion of a poly (vinylidene fluoride)/graphene oxide (PVDF/GO) casting solution into coagulating bath containing 18-crown-6 (18C6) grafted mesoporous silica, ethanol and water. After phase inversion process, the as-prepared adsorbent materials were immobilized on membrane surface by strong electrostatic interaction force. The method could effectively avoid the embedding and aggregation recognition sites, and the coagulating bath only required the ethanol and water that was relatively healthy and environmental. The Rb-ISMs prepared at optimal conditions showed enhanced rebinding capacity (49.344 mg g −1 ) towards Rb ± , with a superior rebinding selectivity (11.8, 6.82, 9.08 for Rb ± /Ca 2+ , Rb ± /Cs ± , Rb ± /Mg 2+ , respectively). Importantly, Rb-ISMs showed remarkable perm-selectivity and regeneration performance, which further demonstrated its potentials in the rapid and effective separation field of Rb ions.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2019
·Vol. 33
·期 3
·e4778
·
IF 3.259
Jicheng Xu,Zhilong Pu,Xuechao Xu,Yuanyuan Wang,Dongya Yang,Tao Zhang,Fengxian Qiu
With the gradual exhaustion of land mineral resources, oceans and lakes have attracted world attention because they are abundant in inorganic mineral resources including lithium, potassium, rubidium and cesium. Lithium is becoming the key material in manufacturing of primary and secondary batteries used in various portable devices and hybrid/electric vehicles. Rubidium has been widely applied inglobal positioning satellites, magneto-optic modulators, solid-state lasers, phosphors, and glass manufacturing. In this work, a novel dual-functional magnetic ion imprinting polymer (Fe 3 O 4 @SiO 2 @IIPs) powder was prepared using 12-crown-4 (12C4) and 18-crown-6 (18C6) as functional monomer, and characterized by FT-IR, elemental analysis, XRD, TGA, SEM and TEM. The adsorption performance of Fe 3 O 4 @SiO 2 @IIPs for simultaneous adsorption of lithium and rubidium from simulative salt lakes was evaluated by batches of experiments at various pH values, contact time, and initial concentrations. Kinetic experiments show that the adsorption process followed the pseudo second order kinetic model. Langmuir adsorption isotherm model and Freundlich adsorption equilibrium data were fitted; the results show that Langmuir isotherm model is more suitable for the adsorption process. Additionally, Fe 3 O 4 @SiO 2 @IIPs exhibit specificity towards Li(I) and Rb(I) and low competitive behavior with Na(I), K(I) and Mg (II). Additionally, the selectivity properties, reusability and adsorption thermodynamic were also investigated. The obtained results show that the prepared Fe 3 O 4 @SiO 2 @IIPs material remains high adsorption capacities after five cycles, exhibits excellent abilities to simultaneously and selectively recover Li + and Rb + and have a promising application in the simultaneous adsorption of lithium and rubidium ions.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Hua-Kai Li,Li-Ping Wang,Zong-Ze Cui,Qi Xu,Liang-Liang Zou,Na Wang,Le-Ping Miao,Heng-Yun Ye,Chao Shi
A series of RbEu bimetallic ammonium metal nitrate hybrid analogues, [(CH3)3NCH2X]2[RbEu(NO3)6] (X = Cl, 1; Br, 2; I, 3), have been synthesized via solvent evaporation. This series shows similar cage-like perovskite frameworks, in which the cations are confined in the spaces enclosed by the hydrogen-bonding interactions. They display structural phase transitions and dielectric switchings between 243−303 K. Detailed single-crystal structural analysis of 1−3 reveals the change of the dynamics of the cation and the distortion of the [Rb4Eu4(NO3)12] anionic framework is the driving force for the structural phase transition. Meanwhile, the thermal and dielectric anomalies is verified by differential scanning calorimetry and dielectric measurements, respectively. Interestingly, the subtle change of cation significantly affects the switching temperature and dielectric behaviors, showing the typical ‘butterfly effect’ in these RbEu bimetallic hybrids. Notably, they also display excellent optical properties, that is, the Eu3+ ion plays as the activator of the photoluminescence property. Meanwhile, compounds 1−3 have phosphorescent characteristics and 1 has the highest fluorescence quantum yield (FQY) of 57.82 %. This finding will be evidently meaningful for exploring high-performance multifunctional switching materials for novel applications.
研究领域:
材料科学
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光学
·
物理化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Taotao Lu,Yongfeng Zhu,Yanxing Qi,Yuru Kang,Aiqin Wang
Until recently, high organic phase volume and the addition of a large amount of surfactants have been two major disadvantages of conventional high internal phase emulsions (HIPEs) templates in the construction of porous adsorbents. Herein, a facile and novel tunable superporous magnetic adsorbent (MSPA) was synthesized by the polymerization of the green surfactant-free (soybean oil)-in-water Pickering medium internal phase emulsion (O/W Pickering MIPEs), which was stabilized synergically by the magnetic yeast (MY) and chitosan (CTS). It is interesting that the extremely stable surfactant-free Pickering-MIPEs can be obtained through the fine synergistic effect between MY and CTS at the oil-water interface, and the pore structure of the magnetic adsorbent can be easily adjusted by changing the ratio of MY to CTS, as well as the external pH. The obtained MSPA with abundant COO − and NH 2 functional groups had a fast capture rate and high adsorption capacities for radioactive Rb + and Sr 2+ ions, respectively. The saturation adsorption capacities of 168.98 and 151.91 mg/g for Rb + and Sr 2+ can be achieved within 25 or 10 min, respectively. Moreover, the MSPA had excellent regeneration ability and reusability. This work provided a feasible and environmentally friendly pathway for preparation of the superporous magnetic adsorbent with tunable porous structure for adsorption and separation application.
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
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2015
·Vol. 641
·期 11
·1953-1958
·
IF 1.16
Yunsheng Liu,Dajiang Mei,Jingli Xu,Yuandong Wu
Sodium magnesium selenite NaMg 2 (OH)(SeO 3 ) 2 and rubidium zinc selenite RbZn 2 (OH)(SeO 3 ) 2 were prepared by hydrothermal reactions. The crystal structures of the title compounds were determined by single-crystal X-ray diffraction. NaMg 2 (OH)(SeO 3 ) 2 crystallizes in the orthorhombic space group Pnma (no. 62) with lattice parameters a = 13.1919(10), b = 6.0415(4), c = 8.2182(6) Å, and Z = 4 and RbZn 2 (OH)(SeO 3 ) 2 crystallizes in the triclinic space group P (no. 2) with lattice parameters a = 4.8698(5), b = 7.3446(8), c = 11.7796(12) Å, α = 82.554(3), β = 78.456(2), γ = 71.603(3)°,and Z = 2. The structure of NaMg 2 (OH)(SeO 3 ) 2 is a three-dimensional framework consisting of edge-sharing MgO 6 octahedra and trigonal pyramidal SeO 3 2– groups, whereas the structure of RbZn 2 (OH)(SeO 3 ) 2 is a two-dimensional layers structure consisting of corner-sharing [Zn 2 O 7 ] dimers linked by trigonal pyramidal SeO 3 2– groups. The compounds were characterized by the solid state UV/Vis/NIR diffuse reflectance, and FT-IR spectroscopy.
研究领域:
无机化学
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材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Rong Zhang,Jian-Feng Sun
Along with the development of versatile trichromatic phosphors, the phosphors bridging the cyan gap between blue and green light have been an ongoing focus in simulating the full-visible-spectrum luminescence to satisfy the daily illuminating demands. Herein, an intriguing cyan-emitting phosphor Rb 2 CaPO 4 F:Eu 2+ belonging to the perovskite-type structural prototype was first time synthesized via the solid-state reaction. Structural analysis indicated that the typical Rb 2 Ca 0.90 PO 4 F:0.10Eu 2+ phosphor crystallizes in the orthorhombic structure with the space group of Pnma (62), and its cell parameters are equal to a = 12.913(5) Å, b = 5.989(4) Å, c = 7.440(1) Å, and V = 575.44(8) Å 3 . The fluorine-centered [FRb 4 Ca 2 ] octahedra interconnect with each other by sharing faces to build the one-dimensional perovskite-structure corrugated chains, which further connect with the [PO 4 ] tetrahedra to establish the structural framework of Rb 2 CaPO 4 F host. The electronic structure of Rb 2 CaPO 4 F matrix was studied by the first-principle calculation on the basis of the density functional theory, revealing an appropriate direct band of 4.76 eV. Pumped with the near-ultraviolet light, Rb 2 CaPO 4 F:Eu 2+ phosphor displayed a bright cyan emission covering from 400 to 600 nm with a broad FWHM of 142 nm. According to the Dexter theory, the concentration quenching mechanism of Eu 2+ -activated Rb 2 CaPO 4 F phosphor was classified as the dipole-dipole interaction. The Rb 2 CaPO 4 F:Eu 2+ phosphor not only exhibits a good thermal stability (I 443 K /I 298 K = 70%), but possesses a satisfactory internal quantum efficiency of 68% which is superior to most of the previously reported cyan-emitting phosphors. Consequently, it turns out that our perovskite-type Rb 2 CaPO 4 F:Eu 2+ phosphor can be considered as a promising candidate to fill the cyan gap toward the full-visible-spectrum light. The present work also demonstrates a great possibility for exploring the novel phosphors inspired by the mineral-type structural prototypes.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2023
·Vol. 9
·期 4
·2201199
·
IF 6.2
Kaiyu Yang,Jinliang Mao,Jinping Zheng,Yongshen Yu,Baolin Xu,Qingkai Zhang,Xukeng Weng,Qiuxiang Lin,Tailiang Guo,Fushan Li
Quasi-2D perovskite light-emitting diodes (PeLEDs) are promising candidates to realize superior luminescent. However, the poorly controlled phase distribution and surface defects hinder the improvement of the device's performance. Here, by introducing rubidium bromide (RbBr) to tune the crystallization kinetics of quasi-2D perovskites, more uniform phase distribution is achieved through the suppression of medium-n phases, resulting in narrower emission spectrum and more efficient energy transfer. Meanwhile, the defects are effectively passivated by the addition of RbBr. As a result, the photoluminescence quantum yield (PLQY) of quasi-2D perovskite films increases significantly from 45.6% to 81.3%, and the maximum external quantum efficiency (EQE) of PeLEDs reaches 18.92%. This finding provides a new insight into the phase distribution control of quasi-2D perovskites and the further improvement of PeLEDs.
研究领域:
材料科学
·
光电学
✓ 已验证
产品关联
DOI
高影响因子
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