DESALINATION
·
2025
·
IF 9.8
Jiangjiang Lv,Zhongwei Zhao,Xuheng Liu,Xingyu Chen,Jiangtao Li,Fenglong Sun
With the surging demand for rubidium and cesium, rubidium and cesium extraction resources have gradually expanded from ores to brines to ensure the security of supply of key metals. However, traditional adsorbents of heteropoly salts inevitably suffer from environmental pollution risks, unsustainability, and cumbersome process flows. In this study, potassium phosphotungstate is employed as an ammonium-free adsorbent for sustainably extracting Rb and Cs from salt lake brine. K 3 PW 12 O 40 shows high adsorption capacity (37.71 mg/g for Rb and 60.42 mg/g for Cs) and fast adsorption kinetics (adsorption equilibrium within only 2 min). The adsorbent also exhibits excellent selectivity, with the separation coefficients of Rb/K up to 167.95 and those of Cs/K up to 759.07. It also maintains chemical stability within a broad pH range of 2–10. The desorption efficiency of rubidium and cesium is up to 99.8 % and 85.6 % respectively. After five desorption-adsorption cycles, the adsorption capacity of Rb and Cs remains at 99.8 % and 86.7 % of the initial adsorption capacity. The adsorbent selectively adsorbs Rb + and Cs + from the practical brine even in the presence of a large number of co-existing ions. The Rb and Cs adsorption mechanism for K 3 PW 12 O 40 was primarily ionic exchange with K. The adsorption process provides excellent performance and environmental advantages based on the salt lake industrial cluster. Efficient adsorption performance of Rb and Cs was achieved without the emission of ammonia nitrogen pollutants and the use of ammonium salt chemicals. This study offers a sustainable alternative for extracting Rb and Cs from salt lake brine.
研究领域:
湿法冶金
·
资源可持续回收
·
无机化学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2016
·
IF 4.82
Bing-Ping Yang,Chun-Li Hu,Xiang Xu,Jiang-Gao Mao
A new series of platinum iodates, namely, α-(H3O)2Pt(IO3)6, β-(H3O)2Pt(IO3)6, and A2Pt(IO3)6 (A = Na, K, Rb, Cs), have been synthesized. Interestingly, among these six stoichiometrically identical compounds, α-(H3O)2Pt(IO3)6 is polar, whereas other compounds are nonpolar and centrosymmetric. They all consist of zero-dimensional [Pt(IO3)6]2– molecular units separated by H3O+ or A+ cations. All of the lone electron pairs of the IO3– groups are aligned and almost point to one direction for α-(H3O)2Pt(IO3)6, whereas IO3– groups are located trans to each other in other compounds. The material, α-(H3O)2Pt(IO3)6, exhibits very strong second harmonic generation (SHG) effects, approximately 1.2 × KTiOPO4 (KTP), and is phase-matchable. Thermogravimetric analysis, elemental analysis, infrared spectra, UV–vis spectra, nonlinear optical properties, and theoretical calculations are also reported.
研究领域:
材料科学
·
化学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 48
·17486-17492
·
IF 4.099
Fangfang He,Lei Wang,Cuifang Hu,Jing Zhou,Qian Li,Ling Huang,Daojiang Gao,Jian Bi,Xin Wang,Guohong Zou
Four antimony fluoride sulfates named A2SO4·SbF3 (A = Na+, NH4+, K+, Rb+) have been successfully synthesized using a hydrothermal method by introducing Sb3+ cations with a stereochemically active lone pair in sulfates and subsequently tuning the structure through the second monovalent cations. All of the title compounds are stoichiometrically equivalent materials which share a common structural motif composed of a distorted SO4 tetrahedron and an asymmetric SbF3 polyhedron. However, the macroscopic centricities of these four compounds are significantly influenced by the size and coordination environment of cations; Na2SO4·SbF3 crystallizes in centrosymmetric space groups Cmca and (NH4)2SO4·SbF3 in Pbca, while K2SO4·SbF3 and Rb2SO4·SbF3 crystallizes in noncentrosymmetric space group P212121. Complete characterization including thermal analyses, infrared and UV-vis spectroscopy, and theoretical calculations is also reported. Powder second harmonic generation measurement for noncentrosymmetric K2SO4·SbF3 and Rb2SO4·SbF3 indicated that both of them are type I phase-matchable.
研究领域:
无机化学
·
材料科学
·
非线性光学
·
晶体工程
·
固态化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Xuteng Yu,Chang Liu,Xifeng Fu,Zi-Ang Nan,Yuheng Li,Zilong Zhang,Qiu Xiong,Yingyao Zhang,Lingyi Meng,Shui-yang Lien,Peng Gao
Inorganic gold halide perovskites, owing to their excellent stability and tunable bandgaps, are poised to serve as environmentally benign alternatives to lead halide perovskites in the field of photovoltaics. In this study, we successfully synthesized two inorganic auric–aurous halide perovskites, Rb2Au2I6 and RbAuCl4, using a straightforward and efficient hydrothermal method, achieving millimeter-sized single crystals. Single-crystal structural analysis revealed that Rb2Au2I6 exhibits a three-dimensional (3D) double perovskite structure, whereas RbAuCl4 shows a two-dimensional (2D) Dion–Jacobson (DJ)-type perovskite structure. We further analyzed their crystallographic information and elucidated the reasons behind the structural differences between them. Moreover, first-principles calculations ascertained their high optical absorption coefficients within the visible light spectrum and indirect bandgap properties. Utilizing theoretical models, we discovered that Rb2Au2I6 and RbAuCl4 exhibit spectroscopic limited maximum efficiency (SLME) of 30.12% and 22.30%, respectively, in films of 500 nm thickness, signifying their potential candidacy as solar cell absorbers. Theoretical calculations related to thermoelectric properties illustrate high ZT (thermoelectric figure of merit) values of about 1.4 and 1.2 at 500 K for Rb2Au2I6 and RbAuCl4, respectively. Based on the significantly shortened synthesis of Rb2Au2I6 and RbAuCl4, our study demonstrated their potential in the field of optoelectronics and thermoelectric materials, which could lay a solid foundation for future applications in energy-conversion devices.
研究领域:
材料科学
·
能源转换
·
物理化学
✓ 已验证
产品关联
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
·
环境科学
✓ 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
·
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2014
·
IF 3.208
Yixin Tian,Zhan Li,Fei He,Yajing Guan,Shuijin Zhu,Jin Hu
Combining with seed coating method, rhodamine B (RB), a kind of fluorescent compounds had been used in seed labeling as an anti-counterfeiting technology. Effects of broad bean seed coating with RB on physiological parameters and fluorescence performance in broad bean seedlings were performed. The prolonged fluorescence in vascular bundles of seedlings treated with RB could be used as a marker of seed anti-counterfeiting. The experiment showed that RB had no negative effect on seed germination, seedling growth, seedling protective enzyme activities, and the contents of malondialdehyde (MDA) and chlorophyll, after coating seeds with ratio 1 kg RB to 10–30 kg seeds. In addition, the RB adsorption by soil was accorded with the isothermal adsorption equations of Langmuir, which exhibited the linear correlation as 0.9959, the maximum adsorption as 1.716 mg/g, and the adsorption equilibrium constant as 0.042 L/mg. The soil adsorption of RB could be effectively degraded by UV/Fenton. Present research suggested that coating broad bean seeds with appropriate concentration RB were safe to seed germination and this technology was suitable for anti-counterfeiting application.
研究领域:
农业
·
种子科学
·
生物技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Kang Li,Junjie Xie,Zhuonan Shi,Changli Min,Zichen Yin,Ruixin Ma,Shina Li
Rubidium and cesium are highly-priced and important rare alkali elements but they always co-exist with large amount of sodium and potassium in a complex system resulting very difficult and expensive to recover. Hexacyanoferrates (MHCFs) is one of the most efficient methods to separate Rb + and Cs + if we don't consider certain drawbacks such as too small particle size and too viscous liquids to be precipitated. In this study, a new kind of hexacyanoferrate, magnesium (II) hexacyanoferrate (RbCs–MgHCF) has been fabricated at room temperature and applied for the first time to recover Rb + and Cs + from high-salty solutions. Compared with traditional divalent transition elements, such as CuHCFs, ZnHCFs, NiHCFs, CoHCFs or FeHCFs, RbCs–MgHCF had excellent precipitation property and large particle size of about 300 nm. The structure, morphology and composition were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), Inductively coupled plasma (ICP), and Energy dispersive spectroscopy (EDS). The effects of various factors (divalent metal cations, surfactant, Mg 2+ /(Rb + +Cs + ) mole ratio, pH value and titration rate) on the recovery of Rb + and Cs + were explored in 50 mL batch experiments. Scale-up experiment were conducted in 6 and 18 L. Results identified that deposition ratio for Cs + and Rb + were 99% and 95% among pH ranges of 4.0–11.0. The composition of RbCs–MgHCF was confirmed to be Rb 0.61 Cs 1.20 K 0.17 Mg 1.01 Fe(CN) 6 by ICP and EDS and the synthesis mechanism of RbCs–MgHCF is proposed.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 23
·9146-9151
·
IF 8.067
Ming-Ze Li,Lin-Tao Jiang,Shao-Min Pei,Bin-Wen Liu,Xiao-Ming Jiang,Guo-Cong Guo
Two new IR NLO compounds, namely Rb2Zn3P4S13 (1) and Cs2Zn3P4S13 (2), have been obtained by introducing d10 closed-shell cations in an alkali-metal containing thiophosphate system. Compounds 1 and 2 are isostructural and feature a 3D [Zn3P4S13] anionic framework. Both compounds exhibit moderate phase-matching SHG intensities at 1910 nm (0.1 × AGS for 1 and 2) and high LIDTs (6.1 × AGS for 1 and 5.2 × AGS for 2). They have wide transparent regions of 2.5–17.7 μm and 2.5–17.0 μm for 1 and 2, respectively, which cover the important far-IR atmospheric window of 3–5 and 8–14 μm for practical applications. Both compounds simultaneously contain two types of NLO-active thiophosphate units (PS4 and P2S6) in their structures, which to the best of our knowledge, is unprecedented in known IR NLO thiophosphates. The NLO efficiencies of 1 and 2 are mainly due to the covalent [Zn2P2S7]2− framework, in which the contribution of P2S6 units is remarkably larger than that of the PS4 units. This work sheds light on the design of promising IR NLO materials by mixing different thiophosphate functional motifs.
研究领域:
材料科学
·
晶体化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2023
·
IF 2.2
Shunye Yu,Yi Shui,Shuo Liu,Gan Huang,Canxiao Huang,Chunhui Geng,Lili Liu,Hongming Liu
Two co-crystalline compounds containing telluric acid and iodate, namely AIO 3 ·H 6 TeO 6 (A = Rb + , NH 4 + ), were investigated as potential nonlinear optical materials. They crystallize into isostructural and consist of isolated [IO 3 ] group and [H 6 TeO 6 ] molecule linked by hydrogen bonds and charge interactions of Rb + /NH 4 + . They show phase-matching second harmonic generation responses with moderate intensity of 1.2 × KDP (Rb + ) and 1.1 × KDP (NH 4 + ). They also possess large optical band gaps over 4.25 eV and can be easily grown from aqueous solutions. The local dipole moment calculations based on the structures of AIO 3 ·H 6 TeO 6 (A = K + , Rb + , NH 4 + ) series of compounds indicate that the change of A + cation in their structural frame causes a slight change in the arrangement directions of [IO 3 ] and [Te(OH) 6 ] groups, and further induces their SHG responses of different intensities at the macroscopic level.
研究领域:
材料科学
·
光学
·
晶体学
✓ 已验证
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2020
·Vol. 2020
·期 42
·4007-4014
·
IF 2.529
Lu Qi,Zhaohui Chen,Lu Li,Qun Jing,Na Li,Zhongqi Jiang,Xiaoyu Dong,Ming-Hsien Lee
Two homologous new mixed-metal phosphates K 2 PbBi 2 (PO 4 ) 2 (P 2 O 7 ) ( I ) and Rb 2 CdBi 2 (PO 4 ) 2 (P 2 O 7 ) ( II ) were successfully synthesized in A 2 BBi 2 (PO 4 ) 2 (P 2 O 7 ) (A = K, Rb, B = Pb, Cd) system through the traditional high-temperature solid-phase method. The single crystal structures of the two compounds are shown to be the unique three-dimensional (3D) framework composed of different types of layers, but not isomorphic. We compared series compounds A 2 PbBi 2 (PO 4 ) 2 (P 2 O 7 ) (A = K, Rb, Cs), which are isomorphic and crystallize in the same space group Pnma . It is noteworthy that they are distinct different in degree of structural disorder, which is tuned by A-site cations. The effect of A-site cations is recognized by analyzing the disorder degree in three related structures and other available 182 mixed-metal phosphates. To the best of our knowledge, such structural analysis is rarely reported in inorganic phosphates and the cation modulation strategy can be used to guide structural disorder according to the difference-value (D-value) of cation radii. Furthermore, the syntheses, thermal analysis, relevant spectroscopic measurements and theoretical calculations for I and II compounds were also discussed. Graphical Two new mixed-metal phosphates K 2 PbBi 2 (PO 4 ) 2 (P 2 O 7 ) and Rb 2 CdBi 2 (PO 4 ) 2 (P 2 O 7 ) were firstly reported and the cation size effect has substantial influence on the crystal structural disorder combining with the title compounds and 182 phosphates.
研究领域:
无机化学
·
材料科学
·
晶体学
·
固态化学
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Ningxia Li,Qi Luo,Meiyan Cui,Zhiying Zhao,Zhangzhen He
New fluorophosphate compounds H A 5 M 6 (OH) 4 F 4 (HPO 4 ) 8 ( A = K, Rb; M = Fe, Ga) were synthesized by a fluorine-rich hydrothermal method . These compounds crystallize in the monoclinic system with a P2 1 /n space group, exhibiting an open framework structure built by [PO 3 (OH)] groups, [MO 4 (OH)F], and [MO 4 F 2 ] octahedra, where ten-membered-ring channels, eight-membered-ring channels, six-membered-ring channels, and the linear M 3+ trimers are seen. The characterizations were carried out by powder XRD , EDS , FT-IR spectra, and magnetic measurements. The results confirmed that H A 5 Fe 6 (OH) 4 F 4 (HPO 4 ) 8 ( A = K, Rb) show a quite similar magnetic behavior, possessing an antiferromagnetic ordering at 14.7 K and 15.6 K, respectively. The changes of the magnetic entropy for such antiferromagnetic orderings can be estimated as ∼10.7 J mol −1 K −1 and ∼13.4 J mol −1 K −1 .
研究领域:
无机化学
·
材料科学
·
固体化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）