JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Dan Chen,Yanling Jin,Wenxuan Zhu,Qingqing Huang,Yaping Li,Minfeng Lü
Three new fluoride phosphates and fluorophosphates, Ba 3 Fe(PO 4 )F 6 , Ba 3 Ga(PO 3.5 F 0.5 )O 0.5 F 5.5 and Ba 3 Fe(PO 3 F)F 7 , have been synthesized through fluoride-rich hydrothermal reactions . Isostructural Ba 3 Fe(PO 4 )F 6 and Ba 3 Ga(PO 3.5 F 0.5 )O 0.5 F 5.5 revealed a three-dimensional structure comprised of [M(PO 4-x )F 4 ] 4−x chains and two-dimensional [Ba 3 F 2-x O x ] 4+x layers [M = Fe,Ga; x = 0,0.5], while Ba 3 Fe(PO 3 F)F 7 contained distorted two-dimensional [Ba 3 F 2 ] 4+ layers and [Fe(PO 3 F)F 5 ] 4- dimers. Two-dimensional [Ba 3 F 2 ] 4+ layers are formed by fluorine-centred tetrahedra. Close examinations of bond length and bond strength in fluorine-centred tetrahedron complexes suggested that fluorine-centred tetrahedra are indeed reasonable structural subunits.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 40
·7081-7089
·
IF 3.545
Qi-Ming Qiu,Ke-Ning Sun,Guo-Yu Yang
Five new rubidium borates, namely Na1/3Rb5/3[B4O5(OH)4] (1), Rb4[B12O18(OH)4] (2), Rb2Ba[B12O18(OH)4] (3), Rb2[B5O8(OH)] (4) and NaRb0.5[B6O10]·0.5H3O (5) have been synthesized under solvothermal conditions. Compound 1 features a 0D structure composed of [B4O5(OH)4]2− clusters. After changing the metal salt, new cyclic [B12O20(OH)4]8− clusters in 2 and 3 are formed, resulting in 1D chains. Such a chain structure is first discovered in dodecaborates. By tuning the reaction temperature and pH of the reaction media, compound 4 with a 4-connected 2D oxoboron layer constructed from partially protonated [B5O10(OH)]6− and compound 5 with a 6-connected 3D framework constructed from [B6O13]8− clusters are successfully isolated. Since compounds 1 and 4 crystallize in the non-centrosymmetric (NCS) space group, second harmonic generation (SHG) measurements and dipole moment calculations have been carried out. The SHG response of 4 is 2.0 times that of KH2PO4 (KDP), which is higher than those of related analogues.
研究领域:
材料化学
·
晶体学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 51
·期 3
·904-909
·
IF 4.39
Chang Liu,He-Di Yang,Pei-Pei Hou,Yu Xiao,Yi Liu,Hua Lin
Inorganic chalcogenides containing cations with lone-pair electrons have attracted considerable attention because of their potential applications in photocatalysis. In this research, two new copper thioarsenates with the lowest Cu-to-As ratio in the quaternary X/Cu/As/Q (X = inorganic cations; Q = chalcogen) system, namely Cs3CuAs4Q8 (Q = S, Se), were obtained by a simple surfactant–thermal method at a low temperature. These two isostructural compounds belong to the monoclinic space group C2/c (no. 15) and are composed charge-balanced Cs+ cations and two-dimensional anionic [CuAs4Q8]3− layers. Notably, photo-electrochemical measurements indicate that Cs3CuAs4Q8 possesses a remarkable photocurrent response under simulated solar-light illumination. Further theoretical studies were performed to gain insights into the relationships between electronic structure and optical properties.
研究领域:
无机化学
·
材料科学
·
光电材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2013
·Vol. 15
·期 38
·7776-7782
·
IF 3.879
Xiang Xu,Chun-Li Hu,Bing-Ping Yang,Jiang-Gao Mao
Systematic explorations of new compounds in the unexplored Ag+–Mn2+/Mn3+–iodate system led to three new silver Mn2+ (or Mn3+)-mixed metal iodates, namely, AgMn(IO3)3, AgMn(IO3)4 and Ag3Mn(IO3)6. These compounds feature the same building units of MnO6 octahedron and IO3, but the different coordination modes of the iodate groups in these compounds led to three different types of anionic structures ranging from a zero-dimensional (0D) cluster to a two-dimensional (2D) layer. Interestingly, the dimensions of the anionic structure decrease with an increase in the IO3/Mn molar ratio in the formula. AgMn(IO3)3 exhibits a 2D [Mn2(IO3)6]n2n− anionic layer in which the Mn2O2 rings are further decorated by terminal iodates and interconnected by bidentate and tridentate bridging iodate groups. AgMn(IO3)4 displays a one-dimensional (1D) [Mn(IO3)4]nn− anionic chain in which each pair of MnO6 octahedra is bridged by a pair of IO3 groups, and within the chain each manganese center is also attached with two terminal iodate groups from both sides of the chain. Ag3Mn(IO3)6 features isolated 0D [Mn(IO3)6]3− anions. The Ag+ cations in all three compounds act as spacers between these anions. Optical, thermal stability and magnetic susceptibility measurements for AgMn(IO3)3 and AgMn(IO3)4 have also been performed.
研究领域:
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xinyu Ma,Aiqi Wang,Jinlei Miao,Tingting Fan
Efficient wastewater treatment under harsh conditions remains a great challenge, while traditional filtration membranes are inefficient to meet the demands due to its poor chemical resistance as well as the “trade-off” effect between high permeability and selectivity. Herein, a chemical-resistant 2D lamellar membrane simultaneously with high flux and rejection for harsh environmental wastewater treatment was proposed, via assembled small sized graphene oxide nanosheets (NGO) layer-by-layer on polyphenylene sulfide (PPS) while hetero-intercalated with MXene. As the performance of 2D laminated membranes is determined by the length/tortuosity of transport channels and interlayer spacing between the flakes, NGO nanosheets were sonicated into small sizes (<500 nm) and intercalated with MXene to engineer shorter/less tortuous transport pathways while tuning the interlayer spacing for fast and selective separation. The membranes exhibit remarkably high-water permeability (up to 136.68 L·m −2 ·h −1 ·bar −1 ) while simultaneously with excellent retention (>99.99 %) for various dyes (molecular weight 288.77–1017.65) at the NGO/MXene ratio of 1/7, which is much higher than most reported membranes. Meanwhile, the Ti-O-C covalent bonding between NGO and MXene nanosheets also enables stable ultrafast water transmission and anti-swelling stability. The PPS-NGO/MXene membranes could still exhibit excellent separation performance even under various harsh environments (strong acids, bases, high pressures, high temperatures, bacteria, organic solvents), which holds great promise for sustainable wastewater treatment under harsh conditions.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-14
·
IF 3.9
Liu Liming,Lian Hongxia,Deng Heming,Zhang Weixin
Challenges associated with the cathode material of Lithium–oxygen (Li–O 2 ) battery, particularly the sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction, as well as the accumulation of discharge product Li 2 O 2 , have hindered its further advancement. Here, an in-situ synthesis strategy was adopted to load a bimetallic Ni–Co metal–organic framework (Ni/Co-MOF) onto MXene (Ti 3 C 2 ) layers. Subsequently, a free-standing and flexible Ni/Co-MOF@Ti 3 C 2 hybrid membrane is prepared via a layer-by-layer self-assembly method, specifically designed for efficient ORR and as a cathode for Li–O 2 batteries. The Ni/Co-MOF@Ti 3 C 2 hybrid membrane integrates the high conductivity, unique two-dimensional layered structure, and excellent mechanical properties of Ti 3 C 2 with the bimetallic active sites of Ni/Co-MOF, exhibiting remarkable ORR catalytic activity in an O 2 -saturated 1 M LiTFSI electrolyte. The structural characteristics of the hybrid membrane provide smoother expansion pathways for Li + and O 2 , effectively promoting the deposition and decomposition of Li 2 O 2 . This not only enhances the electrochemical performance of the Li–O 2 battery but also overcomes the inherent limitations of traditional slurry-based cathode preparation methods. Experimental results demonstrate that Li–O 2 batteries utilizing the Ni/Co-MOF@Ti 3 C 2 hybrid membrane as the cathode achieve an ultra-high capacity of 36,125 mAh/g at a current density of 1000 mA/g, while exhibiting excellent cycle stability (271 cycles with a limited capacity of 1000 mAh/g at 1000 mA/g) and outstanding rate performance. The hybrid membrane’s capacity and cycle performance can be further optimized by controlling its thickness. These promising results offer novel insights into the innovative design of air cathodes for metal–air batteries, and the proposed method provides a new route for the manufacture of high-performance battery cathodes.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 8
·4613-4621
·
IF 2.2
Wang Hongjun,Yang Shuning,Zeng Xiong,Chen Mengyao,Guo Zicong,Mi Pengtao,Zhou Jing,Zhu Yuanyuan
Low-dimensional yttrium oxide (Y 2 O 3 ) nanostructures have garnered significant research interest due to their intriguing properties arising from the dimensional effect and the modulation of the band structure. However, the simple preparation of Y 2 O 3 nanosheets is rarely investigated due to the inherent limitations posed by the counterpart bulk cubic or monoclinic crystal structure. Herein, the low-dimensional layered Y 2 O 3 nanosheets are prepared by a facile route of rapid heating followed by centrifugation, in which its corresponding hydrous-chloride compound is used as the sole reagent. The formation stages of layered Y 2 O 3 nanosheets and corresponding mechanisms are elucidated in detail. The x-ray diffraction results confirm that the intermediate product after rapid heating is yttrium oxychloride (YOCl), which converts to the single-phase Y 2 O 3 with a 2D layered phase after centrifugation. In addition, the obtained Y 2 O 3 nanosheets possess a direct optical bandgap of 5.49 eV, and thus may hold promise for use in electronic applications. This research provides a facile and low-cost method for the preparation of other low-dimensional nanosheets with similar structures. Graphical Abstract
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Yi Ding,Yan Wu,Ying Tian,Yuzeng Xu,Minna Hou,Bo Zhou,Jingshan Luo,Guofu Hou,Ying Zhao,Xiaodan Zhang
Guanidinium (GA) cations are intentionally introduced in MAPbI 3 perovskite by considering its potential capability of stabilizing the material through plenty of hydrogen bonds and mitigating hysteresis because of the zero dipole moment. The configurations of GA cation in film and its effects on structural, optoelectronic and photovoltaic properties of perovskite have been comprehensively studied by systematically modulating the GA ratio. It has been demonstrated that moderate GA cations can effectively passivate the defect surrounding perovskite grains, yielding an enhanced efficiency as high as ~19.2% in a p-i-n type planar solar cells with the GA ratio of 15%. Further increasing the GA ratio deteriorates device performance, as extra GA cations hinder grain growth and thus reduce the grain size, which facilitates the defect generation around the enhanced interface. Moreover, a new two-dimensional (2D) layered perovskite phase that features alternating GA and MA cations in the interlayer space (ACI) appears ultimately, while the ACI phase typically suffers from slow charge transportation across the parallel PbI 2 octahedral layers separated by large A-site cations.
研究领域:
材料科学
·
光电子学
·
太阳能电池研究
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 30
·13592-13598
·
IF 3.591
Chengfa Wu,Junwei Feng,Feng Yu
A new rare earth borate Na2La2B10O19 was successfully synthesized by spontaneous crystallization in a high temperature solution. It crystallizes in the centrosymmetric (CS) space group C2/c with an infinite two-dimensional (2D) double layer which is composed of the fundamental building block (FBB) [B5O12]9−. The calculated birefringence of the compound is 0.06 @1064 nm which mainly originates from the contributions of the B–O anion group according to the first-principles study.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yuan Li,Jixiang Dai,Yuyang Yao,Yan Guo,Yilin Lu,Menglu Zhang,Jiangnan Shen,Lijun Wu
The assembly of two-dimensional (2D) nanomaterials into laminar membranes with sub-nanometer interlayer spacing provides a platform for fouling control in wastewater treatment with membrane technology. However, the strong stacking of nanomaterials limits membrane applications, and although studies have been conducted to modulate the interlayer structure, the enlarged interlayer channels weaken salt ions rejection and foulants removal. Therefore, this study proposed strategies for designing steric network nanostructures and altering the electrical properties at the sub-nanometer scale to improve the interlayer channels of MXene nanosheets and enhance membrane application properties. The functionalized composite membranes exhibit excellent stability due to hydrogen and covalent bonding effects that enhance the binding energy between the nanomaterials. The formation of three-dimensional (3D) nano-interwoven structures significantly enhanced the rejection of salt ions, and the optimized M/PC membrane retained 79.9% of CaCl 2 compared to only 5.3% of the pristine membrane, and without attenuating the water flux due to the deposition of nanomaterials. The improvement of the positive electrical characteristics, competitive adsorption and polar force-driven enabled the effective separation of organic matter and salt ions in the leachate and synthetic solution, the selectivity value of HA/NaCl reached to 40.6. Theoretical calculations showed that polar acid-base ( ΔG AB ) dominated the resistance of membrane fouling and that M/PC membrane significantly repel foulants. This work highlights the importance of MXene sub-nanofluidic channels improvement and interfacial charge modulation for permeability, selectivity and elucidates the mechanisms of fouling control using functionalized membranes.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jitao Cao,Zhao Guo,Shuang Zhu,Yanyan Fu,Hao Zhang,Qing Wang,Zhanjun Gu
Scintillators, as spectral and energy transformers, are essential for X-ray imaging applications. However, their current disadvantages, including high-temperature sintering and generation of agglomerated powders or large bulk crystals, may not meet the increasing demands of low cost, nontoxicity, and flexible radiation detection. Thus, improved perovskite scintillators are developed in this research. A hybrid perovskite ((C8H17NH3)2SnBr4), which is nontoxic, lead-free, and organic–inorganic, is developed as a scintillator with good emission performance and radioluminescence intensity. These perovskite scintillators are synthesized at low temperatures in an aqueous acid solution, through which they generate a near-unity photoluminescence quantum yield of 98% with the excitation of ultraviolet light. As far as we know, this work is the first to show that the two-dimensional (2D) (C8H17NH3)2SnBr4 perovskite scintillator films prepared by coating a polymer layer can be applied to an X-ray imaging system. The results demonstrate that the low cost X-ray imaging device with good resolution and performance benefits dramatically from this lead-free organic–inorganic hybrid perovskite film. Therefore, this 2D-layered (C8H17NH3)2SnBr4 perovskite scintillator may be a high potential candidate for scintillating material for X-ray imaging techniques.
研究领域:
材料科学
·
医学影像
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Honghui Cheng,Kang Li,Xiaolu Fan,Haoran Lou,Yanqi Liu,Qi Qi,Jiamin Zhang,Jingjing Liu,Kai Yan,Yao Zhang
In the present work, two-dimension lamellar Ti 3 C 2 was employed as additive of LiNa 2 AlH 6 . Volumetric dehydrogenation results informed that the onset dehydrogenation temperature of the ball milled LiNa 2 AlH 6 + 5 wt% Ti 3 C 2 sample was lowered by 68 K from that of pristine LiNa 2 AlH 6 . Isothermal pressure-composition (P-C-I) curves and van't Hoff plots demonstrated that the dehydrogenation enthalpy value (61 kJ mol H 2 −1 ) of LiNa 2 AlH 6 + 5 wt% Ti 3 C 2 was significantly reduced from the pristine LiNa 2 AlH 6 (68 kJ mol H 2 −1 ). By means of XPS analyses, it can be revealed that the destabilization of LiNa 2 AlH 6 should be resulted from the involvement of Ti and the yield of unidentified Ti 3+ species. Furthermore, it can be concluded that the lowering of dehydrogenation temperature was merely due to the thermal destabilization of LiNa 2 AlH 6 by Ti 3 C 2 , since Ti 3 C 2 hardly improved the dehydrogenation kinetics of LiNa 2 AlH 6 and reduced its activation energy . However, hydrogenation kinetics was slightly enhanced from the released products of LiNa 2 AlH 6 + 5 wt% Ti 3 C 2 .
研究领域:
材料科学
·
能源储存与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）