ACS Applied Energy Materials
·
2023
·
IF 6.4
Tingting Luo,Fanjie Xia,Quansheng Guo,Shi Liu,Yihao Hu,Yaqiong Zhong,Junhao Qiu,Lin Liao,Wei Ji,Xianli Su,Jinsong Wu,Xinfeng Tang
Semiconductors with diamond-like structures have great potential as high-performance thermoelectric materials. However, they normally have relatively poor electrical transport properties, and conventional methods to improve their electrical transport usually lead to an increase in thermal conductivity, which is a major obstacle to achieving superior thermoelectric performance. Herein, by hot-pressing (HP) technology, we synthesized novel CuCdInSe3 compounds with a diamond-like, cubic zinc blende structure. High-density twin inversion boundaries are found in high-pressure-processed CuCdInSe3, improving the electrical transport property, which has achieved a PFmax value of 0.52 mWm–1 K–2 at 500 K for CuCdInSe3 (HP-200 MPa). Randomly disordered cations in CuCdInSe3 induce an intensive alloying scattering, leading to a relatively low κL of 0.72 W m–1 K–1 at 800 K (HP-300 MPa). The pressure-induced twin boundaries may work as an electron source that can effectively optimize the carrier concentration for CuCdInSe3. The CuCdInSe3 (HP-300 MPa) sample that achieves an improved ZT value of 0.47 at 800 K is attributed to the enhanced electrical transport properties combined with the low κ, which is about seven times that of the sample (HP-50 MPa).
研究领域:
材料科学
·
热电学
·
固体物理
·
半导体材料
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Fei Chen,Dunjie Yang,Wenping Zha,Bodi Zhu,Yanhua Zhang,Junyang Li,Yuping Gu,Qiang Shen,Lianmeng Zhang,Donald R. Sadoway
The advantages of all-solid-state batteries in terms of high energy density and improved safety have accelerated the research into durable and reliable solid electrolytes and into scale up of their processing technology. High lithium-ion-conducting Li 7 La 3 Zr 2 O 12 (LLZO) ceramic-based solid electrolytes have been intensively studied recently, but their widespread commercial deployment has been constrained due to their fragility and brittleness . In the present study, LLZO ceramic powders have been successfully incorporated into the polyethylene oxide (PEO) polymer by tape casting. The ionic conductivity of the PEO/LLZO composite electrolyte membranes is significantly enhanced at the optimal LLZO concentration of 7.5 wt.% at which the materials exhibits maximum ionic conductivity of 5.5 × 10 −4 S·cm −1 at 30 °C. The ionic conductivity enhancement mechanism of the composite electrolyte is revealed by differential scanning calorimetry (DSC), which shows that the LLZO filler represses crystallinity in PEO. Furthermore, as evidence of the advantageous electrochemical properties of the composite electrolyte an all-solid-state battery of LiFePO 4 /Li fabricated herein delivered a maximum discharge capacity of 150.1 mAh·g −1 at 0.1C, good cycling performance, and excellent rate capability under 60 °C.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Shuheng Ding,Zhenyue Liu,Yujun Guo,Jiayi Qu,Feifei Wang,Davoud Dastan,Xiaoming Tan,Xingtai Chen,Xi-Tao Yin
Sm 2 O 3 -modified ZIF-8-derived ZnO nanoparticles were first prepared by a one-step hydrothermal method. • The maximum response to 100 ppm ethanol was 210 at the operating temperature (275 °C). • The reasons for the improved gas-sensitive performance were explored. Constructing heterojunctions is recognized as an effective strategy for enhancing gas sensor performance. Rare-earth metal oxides, owing to their unique properties, can significantly improve the sensing capability of single-metal oxides. This work produced a ZnO/Sm 2 O 3 heterostructure for ethanol gas sensing via a simple one-step hydrothermal method. A static system was used to investigate the gas-sensing properties of the as-prepared sensors. Compared with the pure ZnO sensor, the ZnO/Sm 2 O 3 heterojunction sensor exhibited a significantly enhanced sensing performance toward 100 ppm ethanol. Specifically, its response increased from 130 to 210, the optimal operating temperature decreased from 295 °C to 275 °C, and the recovery time was shortened from 84 s to 17 s. In addition, the sensor demonstrated good selectivity toward ethanol over other interfering gases, as well as excellent long-term stability, while maintaining good linearity and repeatability. The material was characterized using various techniques, including XRD, XPS, SEM, TEM, BET, UPS, and Hall-effect measurements, in terms of micromorphology, elemental composition and specific surface area, revealing cube-like structures and confirming the successful formation of an n-n heterojunction. Finally, the underlying mechanism for the enhanced gas sensing performance was discussed in detail. Download: Download high-res image (68KB) Download: Download full-size image
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2014
·Vol. 38
·期 7
·3071-3077
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IF 3.159
Yi Zheng,Gang Chen,Yaoguang Yu,Yu Wang,Jingxue Sun,Haiming Xu,Yansong Zhou
Pyrochlore-type cubic phase tungsten trioxide hemihydrate (c-WO3·0.5H2O) has been synthesized for the first time via a simple solvothermal process. The photocatalytic properties have been investigated firstly by the photodegradation of RhB, where the c-WO3·0.5H2O sample demonstrated high photocatalytic activity, indicating that c-WO3·0.5H2O is a promising candidate for tungsten oxide-based photocatalytic materials. The investigation result of the crystal water effects on the photocatalytic activity showed that crystal water of c-WO3·0.5H2O played a key role in the photocatalytic activity. The novel method reported in this study has great potential for the development of tungsten trioxide-based functional materials preparation, to improve their photocatalytic efficiency in the elimination of hazardous substance applications as well as for energy materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xiaoxue Ke,Changcun Tang,Renzhi Xiong,Yanhe Xiao,Baochang Cheng,Shuijin Lei
It is an important strategy to design composite materials with a special microstructure and a tunable electronic structure through structural compatibility. In this work, a novel hexagonal/cubic ZnIn2S4 polymorphic heterophase junction with a three-dimensional multihierarchical structure is successfully constructed by in situ growth of hexagonal ZnIn2S4 nanosheets on the surface of cubic ZnIn2S4 flower-like microspheres prepared by topological chemical synthesis. On the one hand, the multihierarchical architecture provides large specific surface area, abundant active sites, and excellent light trapping capability. On the other hand, the construction of a direct S-scheme heterophase junction enables the formation of a special charge-transfer channel under the force of a built-in electric field, which not only improves the separation efficiency of carriers but also ensures the stronger reaction activity of charges. The prepared ZnIn2S4 heterophase junction composite photocatalyst exhibits greatly boosted photocatalytic efficiency in rhodamine B degradation, hexavalent chromium reduction, and water splitting for hydrogen production, which are 12.3, 6.5, and 3.1 times higher than that of pure hexagonal ZnIn2S4 and 8.1, 5.1, and 2.3 times higher than that of pure cubic ZnIn2S4, respectively, demonstrating its significant potential for applications in energy and environmental fields.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Lulan Wang,Hua Yang,Linhua Wang,Xu Sun,Lingfeng Gao,Yunwu Li,Jianmin Dou
The development of low-cost, earth-abundant electrocatalysts for oxygen evolution reactions (OER) is of vital significance to alleviate the energy shortage, but it still faces challenges due to the sluggish kinetics of the four-electron transfer process. We synthesized and characterized a series of FeOOH-decorated hollow-cubic Ni x S y electrocatalysts (Ni x S y /FeOOH) with the morphology maintained after the sulfuration treatment and Fe dip-coating. The stoichiometric ratios, heating temperatures, and Fe inputs can affect the morphology and catalytic activity. The as-prepared optimum Ni x S y /FeOOH electrocatalyst exhibited the lowest OER overpotential (250 mV) at 20 mA cm −2 and Tafel slope (53.07 mV dec −1 ) in 1.0 M KOH and maintained long-term stability and good durability. The outstanding OER performance is likely attributed to the synergistic interaction and electron transfer between FeOOH and Ni x S y species. Therefore, the present work provides a promising route for the design and synthesis of stable and efficient OER electrocatalysts.
研究领域:
电化学
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材料科学
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能源材料
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产品关联
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Hui Ning,Xiaoshan Wang,Wenhang Wang,Qinhu Mao,Zhongxue Yang,Qingshan Zhao,Yan Song,Mingbo Wu
Electroreduction of carbon dioxide (CO 2 ) to ethylene (C 2 H 4 ) is one of the most feasible approaches to reduce the carbon emissions and enhance carbon dioxide utilization , whereas the lack of efficient catalysts impedes the scale application. Cuprous oxide (Cu 2 O) is a promising catalyst for the formation of C 2 H 4 but with unsatisfied selectivity and stability. Herein, we prepared Cu 2 O/nitrogen-doped carbon shell (Cu 2 O/NCS) composite and employed it in the production of C 2 H 4 from CO 2 electroreduction. The ultra-thin NCS with graphene-like structure was prepared from petroleum asphalt by template method . The cubic Cu 2 O nanocrystals are uniformly dispersed on the surface of NCS with ca. 150 nm diameters. Cu 2 O/NCS loaded on glass carbon electrode showed a high faradaic efficiency of C 2 H 4 (24.7%) at −1.3 V ( vs . reversible hydrogen electrode) as well as remarkable stability. The excellent performance of Cu 2 O/NCS is attributed to the high dispersion of cubic Cu 2 O nanocrystals and the abundant pyridinic-N moieties in NCS. This work provides a new strategy to improve the selectivity and durability of Cu 2 O for production C 2 H 4 from electrocatalytic CO 2 reduction by fabricating composites with nitrogen-doped carbon materials.
研究领域:
材料科学
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环境科学
·
电化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Jianzhou Wu,Hehe Qian,Linfang Lu,Jie Fan,Yongsheng Guo,Wenjun Fang
A facile synthesis strategy has been developed to synthesize palladium nanocubes with tunable size and well-controlled morphology. Through adjusting the dosages of acetate species (KOAc, NH4OAc, and HOAc), the sizes of well-defined Pd nanocubes are tuned. The reduction of Pd precursors, a first-order reaction, is influenceable by acetate species, and a quantitative relationship between cubic width and apparent reduction rate constant, which has been found to be an effective parameter to describe the growth process of Pd nanocubes, has been uncovered. The effect of apparent reduction rate constant on the growth of Pd nanocubes has been discussed, and the growth kinetics of Pd nanocubes is quantitatively depicted.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
RSC Advances
·
2011
·Vol. 2
·期 3
·956-962
·
IF 0
Shao-Xin Deng,Xin-Lei Zhang,Jin-Gui Wang,Hui-Jing Zhou,Ping-Chuan Sun,Tie-Hong Chen
Ordered multi-amine functionalized mesoporous silica with a 3D cubic Fdm mesostructure was synthesized with anionic surfactant N-lauroylsarcosine sodium (Sar-Na) as a template, and [3-(2-aminoethyl)-aminopropyl]trimethoxysilane (DAPS) or 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane (TAPS) as co-structure directing agents (CSDAs). To our knowledge, this is the first time the use of DAPS and TAPS as CSDAs in an anionic surfactant templated system have been reported. Using DAPS and TAPS as the CSDA favors the formation of a 3D cubic mesocaged solid with Fdm symmetry, while with 3-aminopropyltriethoxysilane (APS) as the CSDA, only the p6mm mesoporous phase was formed. The geometrical change of the CSDA resulted in a change of the surfactant packing parameter, leading to the change of the silica mesophase from 2D-hexagonal p6mm to 3D cubic Fdm symmetry. After extraction of the templates, multi-amine-functionalized cubic Fdm mesoporous silicas were obtained. The multi-amine functionlized mesoporous silicas exhibit excellent properties in adsorption and removal of heavy metal ions in solution as well as the support of noble metal nanoparticles.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
INORGANIC CHEMISTRY
·
2016
·
IF 4.82
Qing Sun,Guanyun Zhang,Chen-Ho Tung,Yifeng Wang
Herein we report the syntheses and the X-ray structure of [Cs8X27]19- (X = Cl, Br) clusters, the first binary cluster anions isolated in bulk crystal structures. They were obtained by electrostatic capture and face-directed recognition of the prenucleation [CsmCln](n−m)– clusters from water solutions, using [M4(OH)8(OH2)16]8+ (M = ZrIV or HfIV) as the counter cations. These compounds have been thoroughly characterized with a variety of techniques including vibrational spectroscopy and superionic conductivity analysis. This work not only provides structural models for a better understanding of the nucleation of binary materials but also shows that magic number binary clusters adopting a cubic lattice structure do form, in agreement with the time-honored theoretical and spectroscopic predictions.
研究领域:
无机化学
·
材料科学
·
晶体学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Qian Xue,Chao Ye,Mengmeng Zhang,Xiongwei Hu,Ting Cai
Novel cubic gel particles (ssCGP) with Glutathione (GSH) triggered drug release features were prepared by crosslinking the cyclodextrin based metal-organic frameworks (CD-MOFs) templets with a newly synthesized biodegradable disulfide bond-bearing linker and removing of the potassium ion in sequence. The morphology and size of ssCGP were investigated by field emission scanning electron microscope (FESEM) and dynamic light scattering . Energy dispersive x-ray spectroscopy (EDX), fourier transform infrared spectroscopy (FT-IR), powder x-ray diffraction (PXRD) and Brunauer-Emmett-Teller (BET) were employed to characterize the structure of ssCGP. ssCGP have regular hexahedron shape with edge length about 200–400 nm. Excellent ability of drug adsorption was achieved by using doxorubicin (DOX) as a model drug. The GSH triggered drug release of ssCGP was observed both in GSH contained solutions and intracellular environments. ssCGP have been demonstrated as a biocompatible porous nanocarrier , particular for intracellular drug delivery .
研究领域:
药学
·
生物材料科学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Shoulei Xu,Xiaojun Tan,Fenhong Liu,Lei Zhang,Yuyang Huang,Bernard Albert Goodman,Wen Deng
Single crystals of yttria stabilized zirconia (YSZ) doped with different thulia (Tm 2 O 3 ) contents (0.2–3.0 mol%) (abbreviated to Tm 2 O 3 : YSZ) were grown by the optical floating zone method. The crystals were transparent and inclusion free. These samples were then analyzed by X-ray diffraction (XRD), thermogravimetric-differential thermal analysis (TG-DSC), and Raman spectroscopy , and their optical properties were determined with Ultraviolet–visible (UV–Vis) and Photoluminescence spectroscopy (PL). The Tm 2 O 3 : YSZ single crystals were in the cubic phase, and the lattice parameters first increased and then decreased with increasing Tm 2 O 3 content. The absorption spectra showed four peaks at around 356 nm ( 3 H 6 → 1 D 2 ), 460.5 nm ( 3 H 6 → 1 G 4 ), 678.5 nm ( 3 H 6 → 3 F 2,3 ) and 784 nm ( 3 H 6 → 3 H 4 ) in the visible region, and the optical bandgap energy increased with increasing Tm 2 O 3 content, as a result of the Moss-Burstein effect. Measurements of PL spectra indicated a strong blue emission peak at 458 nm ( 1 D 2 → 3 F 4 ), and three weak emission peaks at 487 nm ( 1 G 4 → 3 H 6 ), 497 nm ( 1 D 2 → 3 H 5 ), and 656.5 nm ( 1 G 4 → 3 F 4 ) when the crystals were excited by light with a wavelength of 356 nm. The intensities of the emission peaks were strongly affected by the Tm 2 O 3 content of the YSZ single crystals; the intensity increased with Tm 2 O 3 content at low doping levels, reached the maximum at 0.5 mol% Tm 2 O 3 , then decreased with further increase in Tm 2 O 3 content due to the concentration quenching effect. Additionally, the color changed from blue to cyan as the Tm 2 O 3 content was increased. Overall, this work demonstrates that the cubic YSZ single crystal is a suitable host material for solid state luminescence.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）