APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Le Wang,Yongteng Qian,Jimin Du,Haoran Wu,Zheng Wang,Gang Li,Kaidi Li,Weiming Wang,Dae Joon Kang
In this study, we report the synthesis of cactus-shaped CdS-Cu 9 S 5 heterostructure on copper foam (CdS-Cu 9 S 5 -CF) through a cost-effective strategy. The as-prepared CdS-Cu 9 S 5 -CF is demonstrated to be a highly efficient catalyst for photoelectrochemical (PEC) water splitting, and its high performance is attributed to its unique cactus-shaped structure, which provides abundant surface catalytic active sites, and numerous charge transfer channels, thereby enhancing the transport and separation of photoinduced charge carriers during the PEC process. The optimized 3% CdS-Cu 9 S 5 -CF (the mole ratio of CdS: Cu 9 S 5 = 3: 100) exhibits higher photocurrent density than those of pure Cu 9 S 5 and other CdS-Cu 9 S 5 -CF catalysts because the synergetic effects between Cu 9 S 5 and CdS can significantly inhibit the recombination of photoinduced charge carriers during the PEC process. We believe that the new synthetic route developed in this study will enable the facile preparation of metal sulfide-based catalysts for high-efficiency PEC water splitting.
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2019
·
IF 1.293
Shuwen Gao,Yanwei Sui,Fuxiang Wei,Jiqiu Qi,Qingkun Meng,Yaojian Ren,Yezeng He
A series of nickel sulfides derived from the hexagonal Ni-MOF are vulcanized through adjusting the hydrothermal time and the thiourea concentration. Among all the obtained nickel sulfides, one sample Ni-S2-3, which inherits the Ni-MOF’s morphology, shows the best electrochemical performance with a remarkable specific capacitance of 1128 Fg − 1 at 1 Ag − 1 , a rate capacitance of 50% and a long cycle life of 74% retention after 5000 cycles. Furthermore, the asymmetrical supercapacitors (SCs) based on Ni-S2-3//AC exhibit a good supercapacitive performance with a maximum power density of 16.3 Wh kg − 1 at a power density of 800 Wkg − 1 . All these results indicate that vulcanizing Ni-MOF is an effective way to fabricate a superior electrode material with excellent electrochemical performance for SCs.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Yaoyao Liu,Chunmei Zeng,Lunhong Ai,Jing Jiang
Cadmium sulfide (CdS) has been currently emerged as a promising class of photocatalyst candidates toward hydrogen evolution from water photosplitting because of its unique electronic structure and favorable optical property . However, pure CdS often suffers from the poor stability and fast charge carrier recombination. Cocatalyst engineering is an effective strategy to activate photocatalytic performance of CdS but remains a challenge. Herein, we develop an effective hydrothermal method to construct microwave-derived CdS nanocrystals hybridized with MoS 2 nanosheets . Such hybrids bear the nanocrystal-on-nanosheet heterostructures , ensuring the intimate interfacial contact and increased charge transfer kinetics. The resulting CdS/MoS 2 hybrids exhibit highly efficient photoreactivity and excellent photostability for hydrogen evolution under visible light irradiation. The hydrogen generation rate achieved by the optimal CdS/MoS 2 is approximately 286 times higher than that of pure CdS. This remarkably boosted performance could be ascribed to synergistically interfacial effect that brings an energy-beneficial driving force to realize the highly efficient transfer, migration, and separation of photoexcited charge carriers.
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2019
·Vol. 11
·期 1
·1-14
·
IF 9.043
Luo Linqu,Song Jianjun,Song Longfei,Zhang Hongchao,Bi Yicheng,Liu Lei,Yin Longwei,Wang Fengyun,Wang Guoxiu
3D hierarchical conductive Sn quantum dots encapsulated in N,S co-doped carbon nanofibers sheathed within rGO scrolls (Sn/NS-CNFs@rGO) were prepared through an electrospinning process.
Flexible Sn/NS-CNFs@rGO electrode exhibits superior long-term cycling stability and high-rate capability in sodium-ion batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 29
·17345-17356
·
IF 10.733
Shifu Wang,Zuoyi Xiao,Shangru Zhai,Haisong Wang,Weijie Cai,Longfei Qin,Jianying Huang,Di Zhao,Zhongcheng Li,Qingda An
The design of advanced supercapacitors requires electrode materials that combine high surface area with a developed hierarchical porous structure to facilitate ion transport and electrolyte permeability. Herein, we report a cross-linking and in situ sulfuration strategy for synthesizing nickel sulfide (Ni3S2) nanocrystal-attached cobalt sulfide (Co9S8) encapsulated on three-dimensional (3D) N-doped hierarchical porous carbon (Ni3S2@Co9S8/N-HPC). The Ni3S2@Co9S8/N-HPC composite was extensively studied using different characterization technologies. The results revealed that the obtained material integrated the advantages of a developed N-doped carbon framework (fast ion transport and excellent electrical conductivity) and transition metal sulfide species (high theoretical specific capacitance). Benefiting from the synergistic effect of a strawberry-like Ni3S2@Co9S8 structure and 3D interconnected hierarchical porous carbon, the resulting Ni3S2@Co9S8/N-HPC composite exhibited an ultrahigh attractive specific capacitance of 1970.5 F g−1 at a current density of 0.5 A g−1 and excellent cycling stability with a capacitance retention of 89.5% after 5000 cycles at 10 A g−1. In addition, an asymmetric supercapacitor (ASC) of Ni3S2@Co9S8/N-HPC//HPC was assembled in a 6 M KOH electrolyte. It delivered an energy density of 77.1 W h kg−1 at a power density of 263.3 W kg−1, and it remained as high as 36.1 W h kg−1 even at 25.9 kW kg−1. It is believed that the presented work opens up a new strategy to fabricate high-performance supercapacitor electrodes.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 29
·8975-8981
·
IF 6.641
Lin Long,Erqi Yang,Xiaosi Qi,Ren Xie,Zhongchen Bai,Shuijie Qin,Wei Zhong
In order to obtain the excellent comprehensive properties of microwave absorbers (MAs), core@shell structured Co0.6Fe2.4O4@MoS2 nanocomposites were elaborately constructed and synthesized by a facile two-step hydrothermal method. Due to the independence of the two-step processes, the method could be applied to produce different categories of MoS2 based nanocomposites. The obtained results demonstrated that the as-prepared Co0.6Fe2.4O4@MoS2 nanocomposites exhibited superior electromagnetic wave absorption performances with very low minimum reflection loss (RLmin) value and broad absorption bandwidth at thin matching thicknesses. Impressively, the optimal RLmin value reached −79.9 dB at 11.2 GHz with a thickness of 2.73 mm, and an effective bandwidth of 5.96 GHz was observed with thicknesses of 2.34 and 2.98 mm. Taking into account their the low cost of production, high stability and controllability, the obtained results demonstrated that the Co0.6Fe2.4O4@MoS2 nanocomposites achieved in this study are very attractive candidates for new types of high performance MAs. Moreover, we believe that constructing core@shell structured MoS2-based nanocomposites is a reliable strategy to accelerate advancements of MAs.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Jirong Bai,Haiyang Xu,Gang Chen,Wenhua Lv,Zhijiang Ni,Zhilei Wang,Jiaying Yang,Hengfei Qin,Zheng Zheng,Xi Li
α-Fe 2 O 3 /porous g-C 3 N 4 (α-Fe 2 O 3 /PCN) photocatalysts were fabricated via a facile and green method. Structural characterization indicated α-Fe 2 O 3 nanoparticles were successfully loaded onto PCN. The α-Fe 2 O 3 /PCN nanocomposites were proven durable with significantly enhanced photocatalytic activity for Rhodamine B photodegradation than the single components under visible light irradiation. The improved photoactivity was mainly attributed to the broadened visible light absorption, enriched active sites, and formation of α-Fe 2 O 3 /PCN heterojunction that addressed the recombination of photoinduced electrons and holes. The α-Fe 2 O 3 /PCN hybrids also showed high recyclability and chemical stability.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Pengcheng Zhao,Meijun Ni,Yiting Xu,Chenxi Wang,Chao Chen,Xiurui Zhang,Chunyan Li,Yixi Xie,Junjie Fei
An electrochemical quercetin (Que) sensor based on molybdenum disulfide (MoS 2 ) - carbon nanotube @ graphene oxide nanoribbons (CNTs@GONRs) / thiol-β-cyclodextrin (HS-CD) / aminated graphene quantum dots (N-GQDs) was constructed. Portions of multi-walled carbon nanotubes (MWCNTs) were unzipped to form CNTs@GONRs, and MoS 2 was successfully grown on it to form composites (MoS 2 -CNTs@GONRs). The obtained MoS 2 -CNTs@GONRs / HS-CD / GQDs nanocomposite was characterized by X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). Under optimized conditions, the proposed sensor had an excellent detection performance for Que with a wide linear range from 2.0 × 10 −9 - 1.6 × 10 −6 M and a lower limit of detection (LOD) of 8.2 × 10 −10 M. The sensor also exhibited satisfactory stability and accuracy for Que detection in actual samples (juice and honey). The present work provided a novel method for the detection of Que and also proposed a new type of electrochemical sensing material.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Qinghua Deng,Tifang Miao,Ziqun Wang,Yun Xu,Xianliang Fu
Compositional regulation and modification of CdS are effective strategies to enhance its photocatalytic activity and stability. Herein, a series of MoS 2 modified Co 0.2 Cd 0.8 S nanorods (CCS) was synthesized by a hydrothermal method and used for photocatalytic hydrogen evolution reaction (HER) under visible light irradiation. The results indicated that the HER activity and stability of CdS could be substantially improved by the introduction of Co 2+ into CdS lattice, which can accelerate the separation of photoinduced charge carriers and avoid the formation of high oxidation power holes (h + ) due to the upward shift of the valence band edge. The HER performance of CCS could be further enhanced by the decoration of MoS 2 nanosheets. CCS loaded with 5% MoS 2 (wt%) showed the highest activity (2835.6 μmol·g −1 ·h −1 ), which is about 8.9 and 1.6 times higher than that of CdS and CCS. The type II heterojunction formed between CCS and the intimately contacted MoS 2 accounts for the improvement as MoS 2 can serve as trapping centers for photoinduced electrons (e − ) and active sites for HER. This work demonstrated that the activity and the stability of CdS for photocatalytic HER could be boosted by a consolidation of CoS with the host CdS to form a solid solution and a further decoration with low-cost MoS 2 cocatalyst.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 8
·1-11
·
IF 5.479
Zhou Yanfen,Zhao Mengxin,Meng Zhe,Wang Zelan,Men Xiuqin,Li Jiguang,Li Heping,Yang Jinhui
A magnetic graphene-like molybdenum disulfide nanocomposite was prepared by liquid-phase exfoliation and hydrothermal synthesis. The morphology, structure, and magnetic behavior of the nanocomposite were characterized by X-ray diffraction, FTIR spectroscopy, thermogravimetric analysis, vibrating sample magnetometry, scanning electron microscopy and transmission electron microscopy. The nanocomposite was employed as a sorbent for magnetic solid-phase extraction (MSPE) of eight triazine and ten sulfonylurea herbicides from environmental water and corn samples. Specifically, this was studied with cyanazine, simetryn, atrazine, methoprotryne, ametryn, prometryn, terbutryn, dipropetryn, metsulfuron-methyl, sulfometuron-methyl, amidosulfuron, rimsulfuron, nicosulfuron, bensulfuron-methyl, halosulfuron-methyl, pyrazosulfuron-ethyl, chlorimuron-ethyl, and cyclosulfamuron. The parameters affecting extraction efficiency (sorbent amount, pH value of the sample, extraction and elution conditions) were studied and optimized. Following MSPE, the multi-residue herbicides were quantified by ultra-high performance liquid chromatography combined with ion trap mass spectrometry and electrospray ionization. The limits of detection range between 20 and 170 ng·L −1 . The extraction recoveries of eighteen herbicides from corn samples were in the range between of 64.7% and 103.1%, with RSDs of <17.6%.
Schematic presentation of magnetic graphene-like MoS 2 nanocomposite as an absorbent for simultaneous preconcentration of eight triazine and ten sulfonylurea herbicides in corn and water prior to ultra-high performance liquid chromatography (UHPLC) with ion trap mass spectrometry detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2019
·Vol. 25
·期 11
·5485-5494
·
IF 2.289
Wang Xiaoqing,Tian Songran,Zhang Xiaoqing,Li Guoyan,Liu Ying,Chen Botao,Cheng Bowen
A 3D Ni 3 S 2 @Mn-Co-OH/NF cross-linked nanosheet heterostructure composite electrode has been successfully fabricated by a facile two-step hydrothermal method. The as-prepared Ni 3 S 2 @Mn-Co-OH/NF composite electrode exhibits a high capacitance (3163 F g −1 at a current density of 3 mA cm −2 ), a superior rate performance (2071 F g −1 at a current rate of 30 mA cm −2 ), and stable cycling property (maintaining 96.6% of the initial capacitance after 4000 cycles at a current rate of 10 mA cm −2 ). This excellent electrochemical performance can be ascribed to the unique cross-linked nanosheet heterostructure formed directly on Ni foam current collector and the synergistic effect between Mn-Co-OH and Ni 3 S 2 of the composite electrode.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 20
·5277-5285
·
IF 3.286
Chen Li,Lin Jianwei,Yi Jinquan,Weng Qinghua,Zhou Ying,Han Zhizhong,Li Chunyan,Chen Jinghua,Zhang Qian
Rapid, highly sensitive detection of tau protein and other neurodegenerative biomarkers remains a significant hurdle for diagnostic tests for Alzheimer's disease. In this work, we developed a novel tyrosinase (TYR)-induced tau aptamer–tau–tau antibody (anti-tau) sandwich fluorescence immunoassay to detect tau protein that used dopamine (DA)-functionalized CuInS 2 /ZnS quantum dots as the fluorophore. CuInS 2 /ZnS core/shell quantum dots with high luminescence, low toxicity, and excellent biocompatibility were successfully fabricated and decorated with DA through amide conjugation. Meanwhile, TYR was conjugated with anti-tau by a click reaction. When DA-functionalized CuInS 2 /ZnS quantum dots were added to the sandwich system, TYR catalyzed the transformation of DA to dopamine quinone, which acted as an effective electron acceptor and triggered fluorescence quenching. The fluorescence intensity of the immunoassay based on DA-functionalized CuInS 2 /ZnS quantum dots shows good performance in terms of linearity with the logarithm of tau protein concentration, with a linear concentration range from 10 pM to 200 nM. This work is the first to use a TYR-induced fluorescence immunoassay for the rapid detection of tau protein, paving a new way for the detection of disease biomarkers.
Graphical abstract
✓ 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）