JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yang Li,Junben Huang,Huimin Chen
Single crystals of Al 3 (IO 3 ) 9 ·(HIO 3 ) 6 ·18H 2 O with sizes up to 4 × 4 × 3 mm 3 were grown by the aqua-solution method at room temperature . It crystallizes in the noncentrosymmetric (NCS) hexagonal space group P 6 3 (No. 173) with unit cell parameters of a = 16.1149 (10) Å, c = 12.3886 (11) Å and Z = 2. Its structure features a 3D framework composed by the IO 3 − , HIO 3 and [Al(H 2 O) 6 ] 3+ units. It shows a powder second harmonic generation (SHG) response of about 3.5 × KDP at the particle size of 55–88 μm. The thermal stability , IR and UV–Vis–NIR diffuse reflectance spectra of Al 3 (IO 3 ) 9 ·(HIO 3 ) 6 ·18H 2 O were studied comprehensively. In addition, the first-principles calculation was carried out in order to understand the electronic structure and the origin of the linear and nonlinear optical properties .
研究领域:
材料科学
·
无机化学
·
光学材料
·
晶体学
·
非线性光学
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CRYSTAL GROWTH & DESIGN
·
2021
·
IF 4.076
Xiaoqing Jiang,Hongping Wu,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu
Iodates capable of exhibiting large second-harmonic-generation (SHG) response, wide transparent windows, and ease in crystal growth are an ideal materials class for the design of mid-infrared (IR) nonlinear optical (NLO) crystals. In previous research, we have presented a new strategy for effectively designing noncentrosymmetric iodates on the basis of the structure-directing properties of d0 transition-metal (TM) oxide fluoride anions. However, due to the d–d electronic transition of TM cations, the band gaps of these TM-containing iodates are relatively small. In this study, we substituted TM cations of β-Ba[VFO2(IO3)2] (BVIF) with In3+ cations and successfully synthesized the first F–-containing indium iodate, Ba[InF3(IO3)2]. It has a similar structure and exhibits an SHG response equivalent with that of BVIF. Remarkably, however, the band gap of Ba[InF3(IO3)2] is larger than that of BVIF. The analysis of the structure–property relationship indicates that the enlarged band gap mainly originates from the removal of TM cations. In addition, due to the strong anisotropic polarization of the [IO3]− groups, Ba[InF3(IO3)2] can also exhibit a large birefringence (0.172@1064 nm), which not only is helpful for the phase-matching ability of Ba[InF3(IO3)2] in a wide wavelength range but also suggests that Ba[InF3(IO3)2] may be a potential birefringent crystal.
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JOURNAL OF SOILS AND SEDIMENTS
·
2017
·Vol. 18
·期 4
·1540-1547
·
IF 2.522
Zhang Dong,Lu Li,Lü Ting,Jin Meiqing,Lin Jun,Liu Xingyuan,Zhao Hongting
Purpose Radioiodine is an inevitable product of nuclear fission during nuclear fuel reprocessing and nuclear accident and finally is brought back to surface soil by fallout. Iodine is very active and mobile in soil and may adversely affect human health due to bioaccumulation through the food chain. The aim of this study was to evaluate the immobilization efficiency of biochar on the mobility of iodine (I − ) and iodate (IO 3
− ) in soil near Qinshan Nuclear Power Plant. Materials and methods Biochar was produced from a widely available agricultural waste (rice husk) at a pyrolysis temperature of 350 °C. Biochar was applied to the soil at five application rates (0, 0.33, 0.67, 1, and 1.33%). The affinities of I − and IO 3
− with soil/biochar, the mobility of I − and IO 3
− in biochar-amended soil, and effects of soil pH and ionic strength on immobilization of biochar were assessed by the standard batch sorption and desorption tests. Results and discussion Rice husk-derived biochar exhibited strong affinities for I − and IO 3
− as compared to that of soil, with immobilization ability ( K
biochar / K
soil ) of 936.6 and 309.9, respectively. Results showed that addition of 1% biochar to soil could significantly reduce desorption of I − and IO 3
− from soil. In addition, immobilization efficiency of biochar was not affected by soil physicochemical properties such as pH and ionic strength. Conclusions Results suggested that the easily synthesized biochar could be a promising and environmentally friendly amendment for the efficient immobilization of soil I − and IO 3
− .
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CRYSTAL GROWTH & DESIGN
·
2017
·
IF 4.055
Tong-Ying Chang,Bing-Ping Yang,Chun-Li Hu,Dong Yan,Jiang-Gao Mao
The first series of metal phosphate iodates, namely, M(IO3)(HPO4)(H2O) (M = Sc 1, Fe 2, Ga 3, In 4), have been obtained through hydrothermal syntheses. The title compounds are isomorphic and crystallize in the monoclinic space group C2/c (No. 15). Their structures feature a three-dimensional (3D) network composed of 1D [M(HPO4)(H2O)]+ chains that are further bridged by IO3 groups, forming 1D tunnels based on eight-membered rings along the b-axis. Magnetic measurements revealed antiferromagnetic coupling interactions between magnetic centers in compound 2. The UV absorption spectra measurements revealed that compound 2 exhibits a broad absorption peak at about 427 nm. The TGA studies and IR spectra for compounds 1–4 were also performed.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 25
·期 5
·1221-1226
·
IF 5.16
Tushagu Abudouwufu,Min Zhang,Shichao Cheng,Zhihua Yang,Shilie Pan
The first rare earth metal iodate fluoride, Ce(IO 3 ) 2 F 2 ⋅H 2 O, was synthesized by a hydrothermal method. In the structure, CeO 5 F 4 polyhedra connect with isolated IO 3 groups to form 1D infinite [Ce(IO 3 ) 2 F 2 ] chains, which interconnect with each other by weak hydrogen bonds to construct the whole structure. Ce(IO 3 ) 2 F 2 ⋅H 2 O produces a large second harmonic generation response, which is three times that of potassium dihydrogenphosphate. Theoretical calculations with DFT and dipole moments were performed to illustrate the relationships between the structure and the properties. The results show that Ce(IO 3 ) 2 F 2 ⋅H 2 O is a new iodate fluoride with novel structure and potential applications in nonlinear optics. Graphical Highly responsive : The first rare earth metal iodate fluoride, Ce(IO 3 ) 2 F 2 ⋅H 2 O, which was synthesized by a hydrothermal method, exhibits a large second harmonic generation response, which is three times that of potassium dihydrogenphosphate (KDP; see figure).
研究领域:
材料科学
·
无机化学
·
非线性光学
·
固态化学
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wenwu Zhao,Jinqiang Liu,Haijing Zhou,Jianyuan Yu,Bin Hao,Jian Liu
The efficient photogenerated carriers separation is the key factor in enhancing the activity of photocatalysts to solve environmental pollution problems. The internal polarized electric fields in polar materials most likely provide a more direct and stronger driving force for photogenerated carriers separation. Here, we investigate polar ε -Cd(IO 3 ) 2 (CIO) with two different morphologies as an efficient photocatalyst for the photodegradation of antibiotics and dyes. According to the theoretical calculation of the ratios of m h */ m e * along three different crystal axis directions, the photogenerated carrier separation efficiency along the c -axis direction is the largest, which matches the direction of the polarized electric field in the crystal. The internal polarized electric field promotes the separation of photogenerated carriers, leading to a high transfer efficiency of the catalyst. Moreover, photodegradation experiments demonstrate that the photocatalytic activity of CIO-1 is approximately 3 times that of TiO 2 P25. This study provides some insights that might aid the development of polar photocatalysts with superior performance.
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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.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·
IF 4
Yi Shui,Zhengli Liang,Zhenhua Li,Jiahao Wan,Lehui Liu,Xingxing Jiang,Zheshuai Lin,Hongming Liu
Exploring feasible tactics to induce the formation of non-centrosymmetric (NCS) structures, especially from centrosymmetric (CS) structures, is essential for the development of nonlinear optical crystals with more potential. An NCS alkali metal-containing molybdenum iodate hydrate, namely, NaMoO3(IO3)(H2O), was designed based on the CS matrix NaMoO3(IO3) via introducing a water molecule into the structure. The introduction of one crystalline water molecule results in the rearrangement of Λ-shaped cis-[MoO4(IO3)2] units, and the proper array of the cis-[MoO4(IO3)2] units in NaMoO3(IO3)(H2O) results in its strong SHG response of 4.6 × KH2PO4. In addition, NaMoO3(IO3)(H2O) exhibits a wider optical bandgap of 3.44 eV and a larger birefringence of 0.231 than its matrix. Furthermore, the framework of NaMoO3(IO3)(H2O) is highly similar to that of α-KMoO3(IO3), with water molecules assisting Na+ cations in occupying the position of K+. However, due to the extra hydrogen bond of water molecules, the [MoO3(IO3)]∞ layers in NaMoO3(IO3)(H2O) retain a parallel-stacking arrangement, different from the antiparallel arrangement of layers in α-KMoO3(IO3) with a centric structure. This study confirms the feasibility of applying a water molecule to adjust the orientation of basic building block units to assemble an NCS structure based on CS crystals.
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PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Sun Yuchen,Guo Mingyu
In this work, we report the efficient removal of I − /IO 3 − from wastewater by tripropylamine quaternary ammonium cation based monodisperse microspheres. Benefitting from the rapid solvent exchange process and the excellent ionic selectivity of tripropylamine quaternary ammonium cation, these microspheres show capture rate of 98% for I − and 66% for IO 3 − at a concentration of 50 ppm. Meanwhile, they exhibit high adsorption capacities of 350 mg/g for I − and 370 mg/g for IO 3 − , coupling with excellent reusability. These characteristics highlight their superior practicability for removal of iodine, particularly in the context of radioactive iodine-contaminated water.
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Nature Energy
·
2024
·
IF 49.7
Xie Congxin,Wang Chao,Xu Yue,Li Tianyu,Fu Qiang,Li Xianfeng
The ever-increasing need for energy-dense batteries with high safety is fuelling global research and innovations in new redox chemistry and device design. Here we show an aqueous battery employing highly concentrated hetero-halogen electrolytes that contain I − and Br - , resulting in a multielectron transfer process of I − /IO 3 − . The intermediate bromide species IBr and Br 2 , generated during the electrochemical process, enhances the reaction kinetics and alleviates the potential gap between oxidation and reduction. When using a 6 M I − electrolyte to achieve over 30 M electron transfers, the I − /IO 3 − cathode displayed a high specific capacity of over 840 Ah l catholyte −1 . A battery with Cd/Cd 2+ as the anode demonstrated a high energy density of over 1,200 Wh l catholyte −1 . Even at an exceptionally high current density of 120 mA cm −2 , an energy efficiency of 72% was obtained. Our work demonstrates that safe aqueous batteries with high energy density are possible, offering a development option for grid-scale energy storage and even electric vehicles.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhilan Wang,Yunxiang Zhang,Tao Yuan,Ruiying Zhang,Xiaowan Li
In this study, manganese oxide-supported catalysts (MnO x @SiO 2 ) were synthesized by co-precipitation with a subsequent high-temperature calcination and employed to activate periodate (PI) for the degradation of bisphenol A (BPA). The MnO x @SiO 2 –500 system exhibits optimum PI activation performance with an associated 96.0 % BPA degradation efficiency outperforming MnO x . The MnO x @SiO 2 –500/PI system was subjected to comprehensive analysis, including electrochemical tests, quenching experiments, electron spin resonance (ESR), methyl phenyl sulfoxide (PMSO) probe experiments, Mn ion leaching detection, UV–vis spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results revealed that BPA degradation is promoted by a MnO 2 -PI ⁎ complex via homogeneous activation in solution and iodate radicals (IO 3 • ) involving heterogeneous activation. In the case of the homogeneous activation, Mn(II) undergoes a two-electron transfer to form MnO 2 , which is complexed with PI to generate MnO 2 -PI ⁎ . In the heterogeneous activation, Mn 3 O 4 on the surface of MnO x @SiO 2 –500 activates PI to produce IO 3 • . Based on high-performance liquid chromatography-mass spectrometry (HPLC-MS) and density functional theory (DFT) calculations, three possible BPA degradation pathways are proposed. In pathways I and II, the active species attack C atoms on the two BPA benzene rings to initiate hydroxylation and oxidation. In pathway III, the attack generates a C C bond, yielding multiple degradation intermediates bearing a benzene ring. In addition, the acute and chronic toxicities of by-products with respect to aquatic organisms are predicted using the ECOSAR software. The majority of degradation intermediates exhibit lower toxicity than the starting BPA. This study provides a green and efficient strategy for BPA removal in wastewater treatment.
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CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Wei Zeng,Yao Tian,Xuehua Dong,Ling Huang,Hongmei Zeng,Zhien Lin,Guohong Zou
Birefringent crystals are extensively utilized across diverse optical applications due to their unique property of splitting incident light into dual refracted rays, thereby modulating and controlling light polarization. The pursuit of promoting the birefringence of such crystals to facilitate device miniaturization has recently emerged as a prominent area of focus. In this investigation, we introduce two molybdenyl iodates, namely, C(NH2)3MoO3(IO3) and Rb2MoO2(I2O6)(IO3)2, conceived through a “cation–anion synergetic interaction” strategy. Each compound exhibits a one-dimensional chain structure. Despite processing similar wide band gaps (3.33 and 3.22 eV), these materials display a variance in their birefringence (Δn = 0.426 and 0.261 @546 nm). Notably, C(NH2)3MoO3(IO3) showcases the highest birefringence among all hitherto reported molybdenyl iodates, signifying its potential as a high-performance birefringent crystal. Theoretical analyses indicate that the C(NH2)3+ cation, acting as a birefringence-active unit, significantly bolsters the birefringence of molybdate iodates. Moreover, the presence of extensive hydrogen-bonding interactions between C(NH2)3+ cations and iodates influences the orientation of the highly anisotropic iodates, thereby further enhancing the birefringence of C(NH2)3MoO3(IO3). This research paves the way for the future exploration of organic–inorganic hybrid molybdenyl iodates exhibiting exceptional optical performance.
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