DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 43
·15538-15544
·
IF 4.099
Ruijiao Chen,Xiaowen Wu,Zhi Su
A series of quaternary chalcogenides, Na3ZnMIIIQ4 (MIII = In, Ga; Q = S, Se), were successfully synthesized for the first time through a high temperature solid-state reaction method. All of them exhibit similar structures and crystallize in the I41/acd space group of the tetragonal system. In their structures, typical super-tetrahedron (T2-type) clusters composed of four vertex-sharing (Zn/MIII)S4 tetrahedra are discovered and these T2-clusters further link together to form interesting wavelike chains. Adjacent T2 clusters present a torsion angle of 24.6° with each other when viewed along the c-axis, which has rarely been found among all the reported T2-containing chalcogenides. Moreover, we have systematically investigated the connection modes of NaSn (n = 4–6) in all the known Na-contained quaternary sulfides, and the result shows that the connection modes (corner-, edge-, and face-sharing) of NaS6 ligands in the title sulfides are also rarely (only 3%) found. Besides, the optical properties including diffuse-reflection and Raman spectra are systematically characterized. Theoretical calculations based on the first principles theory were also used to analyze their structure–performance relationships.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yalan Chen,Jingtong Zhang,Peng Guo,Haijun Liu,Zhaojie Wang,Ming Liu,Tian Zhang,Shutao Wang,Yan Zhou,Xiaoqing Lu,Jun Zhang
Hydrogen evolution reaction (HER) driven by high-performance and low-cost electrocatalysts has been well-identified as one of the most promising technologies to explore sustainable power sources. In this work, the authors demonstrated a series of Fe–Mo selenide composite nanomaterials with adjustable HER catalytic activities by a simple one-step hydrothermal reaction. The heterostructured catalyst exhibited significant enhancement in HER activity compared to the pristine MoSe2 and FeSe2 catalysts. It is found that the optimized Mo–Fe selenide can drive the HER at a current density of 10 mA cm–2 by an overpotential of 86.9 mV in acidic solution. Also, it possesses outstanding kinetics (Tafel slope of 57.7 mV dec–1) of the electrochemical reaction. Besides the synergistic effect of different chemicals, the coupled Mo–Fe selenide achieved the electronic modulation of the heterointerface, where electrons were accelerated to transfer from dispersed FeSe2 to the active edges on 1T-MoSe2 and further activated the electrochemical performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 16
·15097-15104
·
IF 2.195
Mi Yijin,Zhao Hui,Jia Dongling,Miao Yuqing
Bosk-like Co–Sn–Se monocrystals are deposited on porous Ti plate through a hydrothermal method. The prepared Co–Sn–Se was characterized with morphology, composition and electrocatalytic properties. Electrochemical measurements revealed that the Ti/Co–Sn–Se electrodes exhibited great catalytic performance for hydrogen evolution reaction with the low onset overpotential of − 50 mV, the small Tafel slope of 83 mV/dec and good stability over an extended period of 34,000 s. The high electrocatalytic activity of bosk-like Co–Sn–Se monocrystals, the fast electron transfer between electrodes and catalysts, and the high conductivity of Ti contribute to their acceptable electrocatalytic performance.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Ning Jia,Mengqi Zhang,Bo Li,Chuanchuan Li,Yangyang Liu,Yupeng Zhang,Tongtong Yu,Yang Liu,Deliang Cui,Xutang Tao
Ternary chalcogenides have drawn intense interest as promising alternative anode materials for Li-storage systems benefiting from their high specific capacity. Herein, the electrochemical performance of a new ternary chalcogenide LiInSe 2 used for lithium ion anode has been reported for the first time. Furthermore, in view of carbon-coating treatment, the optimized anode LiInSe 2 @C for Li-ion batteries exhibits enhanced capacitive behavior and high rate capability. LiInSe 2 @C presents a high reversible capacity of 409.1 mA h g −1 at 100 mA g −1 and a reversible capacity of 270 mA h g −1 after 1000 cycles at 1000 mA g −1 . Further analyses evidence that the outstanding rate performance stems from fast electrochemical kinetics, enhanced by the pseudocapacitive effect and improved electronic/ionic conductivity. These results elucidate the attractive lithium storage performance of LiInSe 2 compound, and would offer a practical polestar to explore novel ternary chalcogenide for energy storage.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 32
·4137-4145
·
IF 2.378
Feng Cui,Qianying Qiu,Gang Peng,Xiaoyan Li,Xi Liu,Xiaojun Chen
The microRNA family shows great promise for the diagnosis and prediction of different cancers as biomarkers, in which miRNA-155 (miR155) is recognized as a biomarker for lung cancer and thus has drawn much attention. Therefore, the development of specific and accurate methods to detect miR155 has become a potential research hotspot. In this work, we presented a fluorescence resonance energy transfer (FRET) technique by utilizing core–shell CdSeTe/ZnS quantum dots (QDs) as a signal reporter and a target recycling strategy as a signal amplifier for the detection of miR155. In the presence of miR155, part of the hairpin probe (HP) immobilized onto the surface of gold nanoparticles (AuNPs)@SiO2, could hybridize with it. Then, numerous H1-AuNPs@SiO2 could be produced with the aid of exonuclease III. With the linkage of the assistant chain A2, H1-AuNPs@SiO2 combined with A1-QDs and then the fluorescence (FL) signal of QDs was quenched by AuNPs@SiO2via FRET. The more miR155 present in solution, the weaker the detected FL signal. A linear response range of 0.01 fM to 1 nM and low detection limit of 3 aM were obtained using the proposed method. Furthermore, this method showed high specificity and satisfactory recovery between 93 and 105% in real human serum samples, illustrating its great potential for practical applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Bo Zhao,Qianqian Liu,Guijuan Wei,Jianghao Wang,Xin-Yao Yu,Xiang Li,Hao Bin Wu
CoSe 2 is a potential anode material for sodium-ion batteries in terms of their high sodium storage capacity and tunable properties. However, structural degradation and unstable interphase during the reversible sodiation and de-sodiation lead to fast capacity decay. In this work, we develop a nanocomposite architecture based on CoSe 2 nanoparticles embedded in N-doped carbon matrix with conformal TiO 2 coating (CoSe 2 @NC@TiO 2 ) by using a metal-organic framework-assisted strategy. The small CoSe 2 nanoparticles and N-doped carbon matrix facilitate charge transport and suppress the structural degradation, while the redox-active TiO 2 shell further strengthens the structural and interfacial stability without decreasing the capacity. The as-prepared CoSe 2 @NC@TiO 2 nanocomposite particles deliver a reversible sodium storage capacity of 520 mAh g −1 at 0.1 A g −1 with a capacity retention of 78% after 200 cycles, in contrast to the rapid capacity fading after 50 cycles of the pristine CoSe 2 @NC particles without TiO 2 shell.
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 45
·455601
·
IF 3.399
Xiaoshuang Chen,Xiangfeng Guo,Lihua Jia,Xin Wang,Kun Song,Chunling Zuo,Rui Yang,Jinping Wang
Optimizing of electrocatalytic hydrogen evolution reaction (HER) activity is still a gigantic challenge for improving catalysts in renewable energy field. In this research, large-scale neoteric three-dimensional (3D) hierarchical MoSe2 hollow sphere arrays with like-Pacific Plate architecture were triumphantly prepared via a facile and reliable approach. The like-Pacific Plate architecture consists of many 3D MoSe2 arrays plates with the dimensions of 10–35 μm, which is assembled by plentiful closely connecting hierarchical MoSe2 hollow spheres with the outer diameter, hierarchically secondary unit size and shell thickness of 450 nm, 25 nm and 10 nm, respectively. The products exhibited remarkable HER performance with small Tafel slope (58.5 mV dec−1), low overpotential (169.8 mV) at 10 mA cm−2, high conductivity and durable stability, which are attribute to the mechanisms (1) 3D hollow framework furnishes large specific surface area, (2) hierarchical structure generates more active sites, (3) like-Pacific Plate architecture facilitates the touch of electrolyte and catalyst, and (4) closely packed arrays expedite the migration of electron. The current work indicates that unique 3D hierarchical hollow sphere arrays with like-Pacific Plate architecture will be a potential candidate for effective electrocatalytic water splitting catalyst material with energy source application.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2019
·
IF 1.573
Kun Wang,Baokun Liu,Peixu Yang,Jinhui Liu,Weidong Zhang,Chengduo Wang,Haojie Lü,Guanwei Jia,Rongbin Li,Shaojun Zhang,Jiang Du
Branched CuInSe 2 nanowires (NWs) are successfully synthesized by one-pot method for making secondary bismuth nanoparticles to attach onto the CuInSe 2 NWs stem for inducing the secondary branch growth by solution-liquid-solid (SLS). The branched CuInSe 2 NWs were measured in order to reveal its viability for PV device fabrication and application for the light-absorbing material in solar cells.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2017
·Vol. 8
·期 1
·8
·
IF 3.553
Bing-Qian Zhang,Yu Liu,Yong Zuo,Jing-Shuai Chen,Ji-Ming Song,He-Lin Niu,Chang-Jie Mao
Copper-based chalcogenides that contain abundant, low-cost and environmentally-friendly elements, are excellent materials for numerous energy conversion applications, such as photocatalysis, photovoltaics, photoelectricity and thermoelectrics (TE). Here, we present a high-yield and upscalable colloidal synthesis route for the production of monodisperse ternary I-III-VI2chalcogenides nanocrystals (NCs), particularly stannite CuFeSe2, with uniform shape and narrow size distributions by using selenium powder as the anion precursor and CuCl2·2H2O and FeCl3as the cationic precursors. The composition, the state of valence, size and morphology of the CuFeSe2materials were examined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM) and high resolution transmission electron microscope (HRTEM), respectively. Furthermore, the TE properties characterization of these dense nanomaterials compacted from monodisperse CuFeSe2NCs by hot press at 623 K were preliminarily studied after ligand removal by means of hydrazine and hexane solution. The TE performances of the sintered CuFeSe2pellets were characterized in the temperature range from room temperature to 653 K. Finally, the dimensionless TE figure of merit (ZT) of this Earth-abundant and intrinsicp-type CuFeSe2NCs is significantly increased to 0.22 at 653 K in this work, which is demonstrated to show a promising TE materialand makes it a possiblep-type candidate for medium-temperature TE applications.Keywords:CuFeSe2;nanocrystals;colloidal synthesis;ligand removal;thermoelectric property
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2017
·Vol. 14
·期 6
·921-926
·
IF 3.889
Tongbing Sun,Caizhen Zhu,Jian Xu
Novel biodegradable diselenide cross-linked starch-based hydrogels were synthesized via free radical copolymerization, which serve as stimuli-responsive drug release materials composed of starch chain backbones with an enzyme hydrolysis property and selenium-containing cross-linkers with a redox responsive cleavage property. Rhodamine B (RB) loaded starch-based hydrogels were prepared in order to investigate their stimuli-responsive release behaviours. In the presence of external redox agents, the enzyme stimuli as well as the mixture of the above stimuli, the prepared starch-based hydrogels exhibit controlled multi-responsive release behavior of RB. Overall, the merits of good biodegradation and multi-stimuli responsiveness make these kinds of starch-based hydrogels promising biomedical candidates for the realization of controlled drug delivery.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Yu-ping Wei,Xing-Pei Liu,Chang-jie Mao,He-Lin Niu,Ji-Ming Song,Bao-Kang Jin
An electrochemical biosensor was developed based on a steric hindrance hybridization assay to allow the highly sensitive detection of streptavidin . In the steric hindrance hybridization assay, the signaling strand DNA (sig-DNA) was labeled at the 3′ end with CdSe quantum dots (QDs) and at the 5′ end with biotin , and capturing strand DNA (the complementary strand of sig-DNA) was labeled at the 5′ end with thiol. The steric hindrance effect generated by streptavidin which was bound with the signaling DNA strand. The streptavidin limited the ability of the sig-DNA to hybridize with the cap-DNA, which were linked on the surface of a gold electrode. Therefore, the concentration of streptavidin was detected indirectly based on the concentration of CdSe QDs on the electrode surface . The concentration of CdSe QDs on the electrode surface was detected by differential pulse anodic stripping voltammetry . Under optimal conditions, the streptavidin detection range using the as-prepared biosensor was 1.96 pg/mL to 1.96 µg/mL and the detection limit was 0.65 pg/mL. The experimental results showed that the electrochemical biosensor could detect streptavidin rapidly and accurately.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 24
·期 9
·2151-2156
·
IF 5.317
Linna Sha,Peng Gao,Xiaochen Ren,Qianqian Chi,Yujin Chen,Piaoping Yang
Graphical Let it Se : An Se−C-bonded interface has been constructed in a Se–graphene (GE) composite through facile high-energy ball-milling. Due to the presence of Se−C bonds, a new self-repairing Se-GE cathode material has been obtained (see graphic). It shows high reversible capacity, long cycle life, and high coulombic efficiency. Lithium–selenium batteries, employing selenium as a cathode material, exhibit some notable advantages, such as high discharge rates and good cycling performance, due to their high electrical conductivity, high output voltages, and high volumetric capacity density. However, an important problem, termed the “shuttle effect”, can lead to capacity decay in Li-Se cells (and in Li-S cells), which arises from aggregation and the loss of Se or S from the cathode into the electrolyte. In this work, in order to solve this problem, a new self-repairing system has been devised, in which some Se atoms are chemically bonded to the carbon atoms of graphene and act as reclaiming points for dissociated Se atoms through the establishment of -Se-Se-Se- chains. Se-decorated graphene (Se-GE) was first constructed through a facile high-energy ball-milling process. Its formation was confirmed by XRD, SEM, HRTEM, XPS, and Raman analyses. As we anticipated, in examining cell properties, the as-prepared Se-GE composite underwent an initial capacity decay in the first 20 cycles (from 1050 mAh g −1 to 750 mAh g −1 , ca. 29 % loss), but the capacity then reverted to 970 mAh g −1 (ca. 92 % of the initial value). Other measurements were also consistent with the recapture of dissociated Se atoms.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）