ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 12
·2310016
·
IF 19
Yi Chang,Zhili Li,Pengfei Luo,Weixiong Qian,Jiye Zhang,Jun Luo
Since the discovery of superior ductility in semiconducting Ag 2 S at room temperature, Ag 2 S-based inorganics attract ever-increasing attention as ductile thermoelectrics (TEs) for flexible electronics, while the monoclinic to cubic structure transition near room temperature (≈455 K for Ag 2 S) of these materials leads to instability of their structures and properties. In this work, single-phase cubic Ag 2 S 1−2 x Se x Te x ( x = 0.13–0.33) samples are stabilized at room temperature via entropy engineering. In comparison with pure Ag 2 S, the random mixing of S, Se, and Te at the anion site results in increased configuration entropy, improved electrical conductivity, decreased lattice thermal conductivity, and thus significantly enhanced TE properties of cubic Ag 2 S 1−2 x Se x Te x samples. By further optimizing the carrier concentration through introducing Ag vacancies, the slightly Ag-deficient Ag 1.98 S 0.34 Se 0.33 Te 0.33 sample achieves a power factor of 6.1 µW cm −1 K −2 and a dimensionless figure of merit zT of 0.4 at room temperature. In the measured temperature range of 300–500 K, this cubic sample with excellent ductility shows not only a record average zT value of 0.62 in ductile inorganics but also very stable TE properties, demonstrating the great potential of entropy engineering in the design of high-performance ductile TE inorganics.
研究领域:
材料科学
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凝聚态物理
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无机功能材料
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热电转换
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柔性电子学
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固态化学
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纳米能源材料
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 30
·2202245
·
IF 19.924
Tingting Liang,Xiaqing Zhang,Lijun Su,Ruilin Hou,Bingjun Yang,Junwei Lang,Shengrong Yang,Xingbin Yan
Perovskite materials can store charge through rapid oxygen anions intercalation. Although numerous perovskite materials owing to rich selections of A and B-site elements are reported as electrodes of supercapatteries, the effect of the crystal structure of perovskite materials on their electrochemical performance has never been studied so far. Herein, using SrCo 0.9 Mo 0.1 O 3− δ , SrFeO 3− δ , Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3− δ , and LaMnO 3− δ as research targets, it is proved that their corresponding cubic structure materials display the best electrochemical performance. And then, the origin of such superiority of cubic structure for SrCo 0.9 Mo 0.1 O 3− δ is explored through experimental investigations and theoretical calculations. The results show that the increase in the content of oxygen vacancies and the enhancement of B-O hybridization of cubic structure can optimize the electronic structure of the perovskite materials, thereby improving its conductivity and accelerating the reaction kinetics. The filtering strategy based on crystal structure proposed by this report will provide a new perspective to faster and more efficient choice of perovskite materials for supercapatteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jing Yang,Yong Yuan,Jiongrui Hou,Zhiyong Xu,Yu Du,Jingqin Yang,Shaoyun Shan,Tianding Hu,Chengxiao Wang,Hongying Su
Hemoperfusion adsorption has been extensively studied for the removal of bilirubin from the blood of patients suffering from acute liver failure, and development of high performance adsorbents is significant to enhance its therapeutic efficacy. In this study, cubic gel nanoparticles (CGNPs) with ordered framework of cyclodextrin (CD) molecules and similar porous structure to metal–organic frameworks (MOFs) were successfully prepared and evaluated as adsorbent to remove bilirubin in blood. Accordingly, γ -CD-MOF with particle size between 300–500 nm was prepared by vapor diffusion method. By further covalently cross-linking of CD molecules and removing of metal ions (K + ), CD-MOF derivative CGNPs with excellent water stability were obtained. Due to the host–guest interaction between CD and bilirubin molecules, the porous structure and spherical cavity of CD-MOF, CGNPs could rapidly adsorb bilirubin within 15 min, achieving a bilirubin removal rate of over 95 %. A high adsorption capacity of 732.11 mg·g −1 was obtained at equilibrium within 2 h. Moreover, the CGNPs showed good blood compatibility through hemolysis and coagulation tests, and a reasonable bilirubin removal rate at 53.4 % was achieved in simulated hyperbilirubinemia plasma. The above results indicate that cubic gel particles with ordered CD frameworks analogous to MOF structures are promising adsorbent for effective removal of bilirubin in hemoperfusion.
研究领域:
医学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Hongyuan Song,Yijia Pang,Linjie Dong,Kun Dong,Haorong Wu,Liangwei Chen,Bin Liu,Zhenhua Ge,Lan Yu
Transition metal oxides are considered ideal electrocatalyst materials due to their low cost and high intrinsic activity. Among them, SrCoO 3- δ has received increasing attention due to its multi-phase structure and tunable electronic properties, though its OER reaction kinetics and catalysis stability are unsatisfactory. Herein, based on a simple one-step solid-state reaction method, we use a small amount of rare earth Y ions (10 %) to transform H-SCO 2.52 from a hexagonal structure to a stable cubic perovskite Sr 0.9 Y 0.1 CoO 3− δ . While broadening the atomic ratio of Co and Fe in the B-site under the cubic perovskite Sr 0.9 Y 0.1 Co 1- x Fe x O 3− δ ( x = 0–1), the relationship between the B-site electronic state, oxygen vacancies, and OER performance has been explored. Sr 0.9 Y 0.1 Co 0.2 Fe 0.8 O 3− δ with a high concentration of oxygen vacancies, exhibits the lowest overpotential of 277 mV and maintains stability at 10 mA cm −2 for 88 h. The valence states of Fe and Co atoms in SYC0.2F0.8 O are optimized (Fe 2+ ∼50.81 %, Co 2+ ∼19.39 %), and the oxygen evolution activity is enhanced by electrochemical reconfiguration to form high-valence Fe and Co ions. Selective leaching of Sr ions via electrochemical surface reconstruction activates FeOOH and CoOOH amorphous layer active sites on the catalyst surface, significantly enhancing reaction kinetics.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuhua Xie,Yumei Feng,Chen Li,Fang Luo,Qing Li,Shiao Zhu,Mingxing Gong,Zehui Yang
The industrial development of acidic water splitting significantly counts on the activity associated with stability of oxygen evolution reaction (OER) electrocatalyst. In this work, we have constructed cubic Rh@Ir core–shell for acidic water splitting. The formed Rh@Ir electrocatalyst shows a high HER performance with only 29 mV overpotential for 10 mA cm −2 , stemming from the upshifted and downshifted d band center of Ir and Rh, leading to a moderate hydrogen binding strength. The Ir atom donates its electrons to nearby Rh atoms triggering a high susceptibility in nucleophilic attack by H 2 O to generate *OOH; thereby, the overpotential required to achieve 10 mA cm −2 is 216 mV for Rh@Ir core–shell, better than commercial IrO 2 . Moreover, the stability is superior to commercial IrO 2 and pure Ir electrocatalyst due to the strong electronic interplay in Rh@Ir contributing to a better resistance towards electrochemical dissolution proved by operando Raman and electrochemical impedance spectroscopies. Only 1.55 V is needed for Rh@Ir to drive overall water splitting at 10 mA cm −2 .
研究领域:
电化学
·
材料科学
·
催化
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2020
·
IF 4.762
Dan Ma,Xuegang Zou,Ruobai Li,Ping Chen,Yalan Wang,Tiansheng Chen,Qianxin Zhang,Haijin Liu,Yuping Chen,Wenying Lv,Yiping Feng,Guoguang Liu
As one of the most toxic heavy metal ions, lead pollution has become an urgent problem. Here, a cubic crystal nanoparticle (Prussian blue analogue, PBA), referred to as potassium manganese ferrocyanide (KMFC) was synthesized and used as a highly-effective sorbent for removing Pb(II) from aqueous solution. KMFC is a mesoporous material that has excellent ion exchange properties, which was confirmed by a series of characterizations. This paper investigated the adsorptive attributes of KMFC for lead ions in aqueous solution. The influences of temperature, contact time and pH on adsorption were studied in batch experiments. The KMFC possessed a robust adsorption capacity for resident lead ions in aqueous solution, which attained 1075.27 mg g −1 at room temperature (25 °C), based on the Langmuir model, which was far higher than any previously reported values. The adsorption process was well fitted to a pseudo-second-order kinetic model, as well as Langmuir and Temkin isotherm models, and was endothermic and spontaneous on the basis of thermodynamic analysis. The adsorption of Pb(II) on the surface of KMFC started with electrostatic attraction, due to the electronegativity of KMFC. Further, ion exchange was the dominant mechanism in this adsorption process, which was confirmed by FTIR, XPS, and other supplementary experiments. The good chemisorption (K + exchange) properties of KMFC suggested that it likely has excellent prospects in applications for heavy metal ions adsorption. This study not only provided a new perspective for the design and development of heavy metal sorbents but provided a deep insight into the mechanism of adsorption of heavy metal ions by PBA.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2018
·Vol. 9
·期 1
·1-8
·
IF 12.353
Li Bo,Zhang Yanan,Fu Lin,Yu Tong,Zhou Shujie,Zhang Luyuan,Yin Longwei
Owing to inevitable thermal/moisture instability for organic–inorganic hybrid perovskites, pure inorganic perovskite cesium lead halides with both inherent stability and prominent photovoltaic performance have become research hotspots as a promising candidate for commercial perovskite solar cells. However, it is still a serious challenge to synthesize desired cubic cesium lead iodides (CsPbI 3 ) with superior photovoltaic performance for its thermodynamically metastable characteristics. Herein, polymer poly-vinylpyrrolidone (PVP)-induced surface passivation engineering is reported to synthesize extra-long-term stable cubic CsPbI 3 . It is revealed that acylamino groups of PVP induce electron cloud density enhancement on the surface of CsPbI 3 , thus lowering surface energy, conducive to stabilize cubic CsPbI 3 even in micrometer scale. The cubic-CsPbI 3 PSCs exhibit extra-long carrier diffusion length (over 1.5 μm), highest power conversion efficiency of 10.74% and excellent thermal/moisture stability. This result provides important progress towards understanding of phase stability in realization of large-scale preparations of efficient and stable inorganic PSCs.
研究领域:
材料科学
·
光伏技术
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纳米技术
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Bing Yu,Guoqiang You,Lei Wang,Kaixuan Zhou,Yong Zhao,Bin Jiang
The Gd-rich cubic phase, which is ubiquitous in Mg-Gd alloys, plays a crucial role in determining their mechanical properties. However, its chemical composition has long been debated, and it has often been misidentified as MgGd or GdO. This study focuses on the origin and hereditary characteristics of the cubic phase. Through multiscale characterization techniques such as X-ray diffraction analysis, scanning electron microscopy, focused ion beam, and transmission electron microscopy, the microstructural evolution of three as-cast Mg-Gd binary alloys and their diluted counterparts (Mg-10 wt% Gd) was systematically investigated. The spatial distribution, crystal structure, and chemical composition of the cubic phase were examined. Microstructural analysis reveals that the cubic phase in the Mg-Gd binary alloy exhibits a face-centered cubic structure (lattice parameter a ≈ 0.5328 nm), and it is identified as GdH 2 . Additionally, trace amounts of α-Gd are detected. Upon dilution to Mg-10 wt% Gd, the GdH 2 phase remains largely undissolved, demonstrating stable hereditary characteristics, whereas the submicron α-Gd phase completely dissolves. The hereditary characteristics of GdH 2 are closely associated with the H content in the melt and the initial microstructure of the Mg-Gd binary alloy. This study resolves the existing controversy regarding the cubic phase, establishing a theoretical foundation for optimizing the design of Mg-Gd alloys and enhancing the strength–ductility synergy.
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Jun Cai,Yuanhang Ren,Yi Xia,Lei Tao,Xueqian Wang,Langlang Wang,Ping Ning,Yixing Ma
A cubic SrTiO 3 (STO) composite material co-doped with Ce and Cr ions was synthesized by solvothermal method . The fully characterized samples were employed as photocatalysts for the oxidation of Hg 0 . The co-doped samples afforded excellent catalytic removal efficiency of 98.99% using UV irradiation and 89.9% using visible light irradiation for Hg 0 compared with the single-doped samples. It was found that co-doped samples had a lower electron-hole recombination rate, largest Brunauer-Emmett-Teller specific surface area , and reduced band gap. The electron spin resonance results revealed that ·O 2 − and ·OH were the main active species in the catalytic process. Moreover, the co-doped samples exhibited the best electron transfer rate and the highest photocurrent response intensity. The electron transfer between the elements in the co-doped sample enables it to achieve stable and efficient catalytic performance. In addition, even after five consecutive catalytic runs, the co-doped sample maintained high catalytic activity . This work highlights the potential of the perovskite-type STO materials in the photocatalytic oxidation of gaseous mercury.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiangfan Sun,Mingcai Yin,Yixian Li,Kaiyue Liang,Yaoting Fan,Zhongjun Li
CdS is a promising photocatalyst and combining MoS 2 with CdS can realize efficient photocatalytic hydrogen production. However, most of the previous researches about MoS 2 /CdS composites focus on hexagonal CdS. Studies on cubic CdS are still rare due to its unstability. Thus in this paper, a ternary composite CdS-MoS 2 /C (abbreviated as CdS-MC, M = MoS 2 , C = activated carbon) was synthesized by facile in-situ liquid phase precipitation of cubic CdS on MoS 2 /C. Based on a series of characterizations, its photocatalytic hydrogen production performance was studied. Under the irradiation of a LED lamp , a high H 2 evolution activity of 879.6 μmol h −1 was achieved for the composite CdS-10%MC, which is 23.3 times that of pure CdS. In addition, its performance is much higher than that of the hexagonal CdS-MC sample (265.6 μmol/h) obtained by heat-treatment of CdS-MC at 400 °C for 1 h under N 2 atmosphere. What’s more, the stability of CdS-MC was investigated and the possible reasons for its unstability were analyzed in detail. To improve the stability, a method of 4-mercaptobenzoic acid (4-MBA) modification was also managed. Finally, possible mechanism for the photocatalytic hydrogen production of CdS-MC was proposed.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2010
·
IF 4.224
Zhengjun Wang,Jie Liu,Feijiu Wang,Siya Chen,Hui Luo,Xibin Yu
Uniform and monodisperse ZnSnO3 cubic crystallites were prepared via a solution process involving the reaction of zinc sulfate and sodium stannate at a reaction temperature as low as 0 °C without any surfactant. The size was readily controlled from 40 to 600 nm by varying the reaction temperature. The possible formation mechanism of cubic crystallites was attributed to a nucleation assembly process. The as-fabricated sensors based on ZnSnO3 cubic crystallites showed high sensitivity, fast response, and short recovery times toward HCHO gas. And as the particle-size of ZnSnO3 cubic crystallites decrease, the sensitivity of gas sensors based on them increases and the recovery time shorten rapidly. The detection limit of ZnSnO3 cubic crystallites sensor can reach as little as lower than one per million for HCHO. The performance of a home-built ZnSnO3 cubic crystallites sensor was even better than the competing SnO2 and In2O3 sensor, making this material interesting for sensor devices.
研究领域:
材料科学
·
纳米技术
·
传感器
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 20
·12538-12546
·
IF 10.733
Wanhua Wang,Yi Yang,Daoming Huan,Likun Wang,Nai Shi,Yun Xie,Changrong Xia,Ranran Peng,Yalin Lu
Driven by the increasing global energy demand, the development of innovative energy conversion and storage systems is becoming more and more urgent. As one of the attractive means, water splitting has attracted widespread attention because of its great potential in storing electricity in the form of chemical fuel which also makes it a promising solution to the utilization of non-grid electricity generated by solar or wind. The oxygen evolution reaction (OER) is generally deemed as the key rate-limiting step of water splitting, and thus studying efficient OER electrocatalysts with a low overpotential and good stability is of vital importance. Here, we successfully prepared an OER catalyst with excellent electrochemical performance through a simple anion doping. Firstly, a stable cubic perovskite SrCoO3−δ was prepared by anion F-doping instead of traditional A and/or B site doping. Secondly, SrCoO2.85−δF0.15 demonstrates excellent OER activity superior to its parent hexagonal compound H-Sr2Co2O5 and those perovskites prepared via complicated A- and/or B-site doping. DFT calculations and XPS investigations reveal that the cubic structure and the highly oxidative oxygen species (O22−/O−) via F− doping jointly contribute to the better OER properties of SrCoO2.85−δF0.15. Our work brings forth a promising strategy to stabilize cubic structures from hexagonal ones via a simple anion doping strategy, which may open a new avenue for the development of even more effective OER catalysts and may be applied in many other fields related to structure transformation, in addition to energy and catalysis fields.
研究领域:
能源材料科学
·
催化化学
✓ 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）