DALTON TRANSACTIONS
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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
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材料科学
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光电材料
✓ 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
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光电子学
·
太阳能电池研究
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2017
·
IF 2.299
Fan Gao,Liangliang Huang,Yike Ma,Shufei Jiao,Yansong Jiang,Yanfeng Bi
A new layered gallium phosphate Ga 3 (PO 4 ) 4 (C 2 N 2 H 8 )·(H 2 C 2 N 2 H 8 ) 2 ·Cl (compound 1 ), has been ionothermally synthesized in the presence of deep eutectic solvent (DES) comprising mixtures of choline chloride and 2-imidazolidone (IMI). Single-crystal X-ray diffraction analysis reveals that compound 1 shows 2D layered framework with 10-ring windows, which is constructed from unusual heptamer second building units (SBUs). The ethylenediamine (en) units deriving from the decomposition of IMI, play a dual role as bidentate ligands coordinated with 6-fold coordinate gallium atoms and the templates. Additionally, compound 1 shows photoluminescence property in solid state at room temperature .
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 17
·10766-10777
·
IF 4.036
Xiangyang Chen,Xinmei Zhang,Jipeng Chen,Weibin Bai,Xiaoxiao Zheng,Qi Lin,Fengcai Lin,Yanlian Xu
The economic loss and environmental damage caused by metal corrosion is irreversible. Thus, effective methods, such as coating technologies are used to protect metal surfaces from corrosion. In this work, cardanol-based benzoxazine (CB) was synthesized by a solvent-free method using cardanol, paraformaldehyde and n-octylamine. A cardanol-based benzoxazine copper polymer (CBCP) with good mechanical properties was then prepared by CuCl2 catalysis and can be cured at room temperature. Subsequently, polyimide corrosion inhibitors with a two-dimensional sheet structure (pyromellitic dianhydride polyimide (PDPI) and 1,4,5,8-naphthalene tetracarboxylic dianhydride polyimide (NDPI)) were designed and prepared. Lastly, PDPI or NDPI was mixed with CBCP to obtain two-dimensional lamellar polyimide/cardanol-based benzoxazine copper polymer composite coatings. The Tafel curves and electrochemical impedance spectroscopy (EIS) measurements showed composite coatings with good corrosion resistance in different corrosive media. Compared to CBCP coating, the anticorrosion performance of the composite coatings improved obviously, especially the coating obtained with 0.5 wt% PDPI. It exhibits a high polarization resistance (3.874 × 109 Ω), a high protection efficiency (99.99% and 97.98%) and low corrosion rate (3.376 × 10−6 mm year−1). This work suggested a facile and eco-friendly strategy for preparing bio-based anticorrosive composite coatings from low cost and abundant cardanol and polyimide corrosion inhibitors, which will significantly promote their application in metal anticorrosion.
研究领域:
材料科学
·
腐蚀与防护
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绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Jinfen Lou,Kai Zhang,Shuhao Qin,Yang Lei,Yufei Liu,Min He,Jie Yu
In this work, a nanocomposite phase change material (PCM) has been designed by combining two-dimensional lamellar anhydrous calcium sulfate with polyethylene glycol (PEG). We report a facile strategy to controllably fabricate two-dimensional lamellar anhydrous calcium sulfate (LAH) with the average thickness of 28.63 nm from phosphogypsum (PG) through ethylenediamine tetraacetic acid disodium (Na 2 EDTA) induction in glycerol and ethylene glycol solutions at 98 °C. The obtained 2D lamellar CaSO 4 was a slit-type mesoporous material stacked by the nanosheet of calcium sulfate. It has a specific surface area of 70.02 m 2 /g, which is 10 times larger than phosphogypsum. Na 2 EDTA acts as a crystal habit-directing agent to regulate crystal morphology through nonclassical nanoparticle-mediated crystallization processes, resulting in the crystalline morphology tending to be lamellar. Lamellar anhydrous calcium sulfate phase change composites (LAHPCMs) were prepared with 2D lamellar anhydrous nano-CaSO 4 and polyethylene glycol (PEG). The LAHPCMs had a high latent heat storage capacity (92.99 J/g). Lamellar anhydrous calcium sulfate phase change composites have good thermal stability and durability, structure stability, and good liquid leakage resistance. These results provide the possibility for phosphogypsum to be used for energy storage and thermal insulation.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2020
·
IF 4.231
Zhiwei Cui,Yue Hu,Yukang Zhang,Qiutong Han,Ying Wang,Yong Zhou,Zhigang Zou
A new triazine-based conjugated polymer THT-TA was constructed with simple building blocks 2,4,6-trihydrazino-1,3,5-triazine (THT) and terephthalaldehyde (TA) via solvothermal reaction. The structural characterizations confirmed the successful synthesis of the polymer, and TEM images clearly revealed the sheet-like morphology. The 2D layered structure was further confirmed by XRD , and the semi-crystalline pattern was better fitted with a novel parallelogram framework rather than classic hexagonal framework. The optical band gap of THT-TA was 2.50 eV, and the frontier orbitals were delocalized across the framework from DFT calculation, validating that higher degree of conjugation was achieved from small monomers . The photocatalytic hydrogen evolution was successfully achieved with Pt as co-catalyst and sodium ascorbate as sacrificial agent under visible light (λ > 420 nm), and the sample showed considerable stability in the long-term test for more than 200 h.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 25
·9793-9802
·
IF 4.569
Junjie Pan,Weijun Tu,Shanhong Ma,Xin Sun,Qiliang Zhao,Hongjiao Qu,Tao Wang,Jianping He
The lightweight carbon skeleton compounded with magnetic nanoparticles as excellent electromagnetic wave absorbers has attracted much attention considering their strong dielectric loss and magnetic loss, as well as the optimized impedance matching. However, the conventional method of compounding magnetic metals with carbon materials usually leads to the inevitable aggregation of magnetic nanoparticles, resulting in poor microwave attenuation characteristics. In this study, two-dimensional (2D) lamellar carbon matrix ferrocobalt (CoxFe1−x/C) nanocomposites are prepared using sodium chloride (NaCl) as a hard-template. By regulating the relative contents of Co and Fe in the nanocomposites, the 2D lamellar carbon skeleton with uniformly dispersed magnetic nanoparticles can be obtained successfully. Furthermore, the existence of a variety of metal and alloy phases promotes the generation of multiple attenuation characteristics. As a result, the Co0.9Fe0.1/C exhibits a broad effective absorption bandwidth of about 5.4 GHz at a thin thickness of only 1.65 mm. The excellent electromagnetic wave absorption can be attributed to the formation of a 2D lamellar structure and the uniform distribution of magnetic nanoparticles being conducive to the enhancement of polarization loss including dipole polarization loss and interfacial polarization loss. Considering that, the 2D lamellar Co0.9Fe0.1/C nanocomposite is promising to be a candidate for excellent electromagnetic wave absorbers.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
·
2024
·Vol. 24
·期 8
·2604
·
IF 3.4
Zhihua Zhao,Zhenli Lv,Zhuo Chen,Baocang Zhou,Zhigang Shao
Metal oxide semi-conductors are widely applied in various fields due to their low cost, easy processing, and good compatibility with microelectronic technology. In this study, ternary α-Fe2O3/TiO2/Ti3C2Txnanocomposites were prepared via simple hydrothermal and annealing treatments. The composition, morphology, and crystal structure of the samples were studied using XPS, SEM, EDS, XRD, and multiple other testing methods. The gas-sensing measurement results suggest that the response value (34.66) of the F/M-3 sensor is 3.5 times higher than the pure α-Fe2O3sensor (9.78) around 100 ppm acetone at 220°C, with a rapid response and recovery time (10/7 s). Furthermore, the sensors have an ultra-low detection limit (0.1 ppm acetone), excellent selectivity, and long-term stability. The improved sensitivity of the composites is mainly attributed to their excellent metal conductivity, the unique two-dimensional layered structure of Ti3C2Tx, and the heterojunction formed between the nanocomposite materials. This research paves a new route for the preparation of MXene derivatives and metal oxide nanocomposites.
研究领域:
材料科学
·
传感器技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 8
·2203031
·
IF 9
Zhongyuan Li,Bin Li,Wuqi Liu,Dong Yan,Qiang Tang,Zhen Fang,Rong-Jun Xie
Mn 2+ -activated halide double perovskites (HDPs) are found to show promising luminescent behavior and have great potential for optoelectronic applications. However, such interesting materials hitherto are only limited to compounds with a monotonous three-dimensional structure and show a low photoluminescence quantum yield (PLQY). Herein, an Mn 2+ -doped two-dimensional (2D) layered HDP PPA 4 NaInCl 8 (PPA + = C 6 H 5 (CH 2 ) 3 NH 3 + ) showing promising photoluminescence properties is reported. The large separation between the adjacent inorganic sheets and the good dissolution of Mn 2+ in the layered structure endow PPA 4 NaInCl 8 :Mn 2+ with efficient red emission and a record PLQY of 69.90%. The spectroscopic analyses and density functional theory calculations indicate that the inherent absorption and luminescence stem from the inserted organic cations PPA + in PPA 4 NaInCl 8 . An energy transfer process occurs between the singlet excitons from PPA + and Mn 2+ , resulting in tunable emission accompanied by the variation of Mn 2+ concentration. These results provide several new fundamental insights on doping and doped 2D layered HDPs, which enhances the understanding of structure−property relations in this important family.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Junjie Pan,Xin Sun,Zhengzhi Jin,Tao Wang,Qiliang Zhao,Hongjiao Qu,Jianping He
Low-dimensional carbon matrix nanocomposites are promising for lightweight and efficient electromagnetic wave absorption considering their large specific surface area and the multi-interface interaction. However, it remains a challenge to maintain the uniform dispersion of magnetic nanoparticles , which plays a vital role in regulating both dielectric and magnetic loss abilities. In this paper, by sodium chloride (NaCl) hard template, two-dimensional (2D) lamellar Co/C (NCC) and Fe/C (NFC) nanocomposites with well dispersed magnetic nanocomposites are prepared consecutively. An in-depth study of the construction of 2D lamellar structure on the electromagnetic dissipation and impedance matching has been carried out. The result shows that the 2D lamellar NCC and NFC prepared by NaCl hard template own the higher degree of graphitization and dielectric loss than those three-dimensional (3D) bulk composites without the addition of NaCl. Furthermore, the series of 2D lamellar nanocomposites exhibit excellent microwave absorption properties . The minimum reflection loss ( RL ) value of NCC and NFC can reach −52.2 and −46.7 dB, respectively. Particularly, accompanied by the thin thickness of only 2.0 mm, the effective absorption bandwidth (EAB, RL ≤ −10 dB) of NFC can reach 5.4 GHz (11.5–16.9 GHz). Furthermore, the smallest RCS value of only −8.098 dBm 2 for NFC under vertical incidence can be obtained for excellent electromagnetic wave scattering and absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 33
·14103-14107
·
IF 3.288
Chanchan Xu,Le Lv,Dawei Luo,Wei Liu
By using pyrazine derivatives, three different types of copper(I) iodide based inorganic–organic hybrid structures, 1D-CuI(2-mo-pz) (1, 2-mo-pz = 2-methoxy-pyrazine), 2D-CuI(2,3-dm-pz)0.5 (2, 2,3-dm-pz = 2,3-dimethyl-pyrazine), and 2D-Cu2I2(2,5-dm-pz)2 (3, 2,5-dm-pz = 2,5-dimethyl-pyrazine), have been obtained by using a slow-diffusion method. Single crystal and powder X-ray diffraction analyses reveal that these hybrid structures are a one-dimensional (1D) staircase chain based structure, two-dimensional (2D) staircase-chain based structure, and 2D rhomboid dimer based structure, respectively. All of the three compounds show photoluminescence, with the internal quantum yield (IQY) as high as 88.2% for 1. This work provides evidence that for this type of hybrid materials, the structure of the inorganic module could be determined by the selection of the organic ligands and that the substituted group on the organic ligands can influence the luminescence efficiency of the hybrid structures.
研究领域:
无机化学
·
材料化学
·
配位化学
·
光物理
·
功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）