CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Yanqiao Xu,Ting Chen,Zhixiang Xie,Weihui Jiang,Lianjun Wang,Wan Jiang,Xiaojun Zhang
Understanding the surface characteristic-optical property relationship of Cu-In-Zn-S (CIZS) quantum dots (QDs) is necessary for tuning the optoelectronic performances, and the photoluminescence quantum yields (PLQYs) of CIZS QDs prepared in aqueous solution are still relative low compared with that of obtained in organic phase, which seriously restricts their applications. Herein, an efficient method was proposed to prepare CIZS/ZnS/PVP composites and their application in white light-emitting diodes (WLEDs) was investigated. CIZS QDs were synthesized through hydrothermal process with the assistance of ionic liquid (IL), which could enhance the PL performance and reduce the reaction time simultaneously. The effects of hydrothermal temperature and time on the phase composition, morphology, and optical properties of CIZS QDs were systematically investigated. The results showed that the BF 4 − anion played a crucial role in boosting the emission property of CIZS QDs owing to the effective reduction of dangling bonds on the surface of QDs, which induced by the corrosion of F − deriving from the decomposition of BF 4 − . The surface modulation led to the improvement of PLQY from 6.2% to 8.4%. In addition, the PLQY of QDs was further improved to 31.2% by coating with ZnS shell around CIZS cores. Furthermore, highly luminescent CIZS/ZnS/PVP composites were prepared to eliminate the aggregation-induced fluorescence quenching effect, which was beneficial to the application in WLEDs. Consequently, a WLED achieved the color rending index (CRI) of 87.2, correlated color temperature (CCT) of 4977 K, and luminous efficacy (LE) of 90.11 lm/W by using the orange-yellow CIZS/ZnS/PVP composites and green Lu 3 Al 5 O 12 :Ce 3+ phosphors as the color conversion layer, suggesting the potential for solid state lighting application.
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ELECTROCHIMICA ACTA
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2020
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IF 6.215
Jiayong Dai,Le Yao,Xingsu Gao,Shumeng Bai,Xian Chen,Lei Li,Jibin Song,Huanghao Yang
The establishment of analytical methods with superior sensitivity, selectivity, accuracy, and stability, as well as ultralow detection limits inspired a broad range of research enthusiasm. In this work, we developed an electrochemical method for detecting mercury ions using metallic 1T-MoS 2 nanosheets, which was firstly fabricated using phase engineering strategy and then exfoliated. Remarkably promoted sensitivity and significantly lowered limits of detection (LODs) were achieved due to the dramatically reduced charge transfer resistance of 1T-MoS 2 nanosheets compared with that of the semiconducting 2H-MoS 2 nanoflakes. After electrode modification and optimization, working curves for both two materials were obtained. Astonishingly, the LODs of 1T-MoS 2 modified glassy carbon electrodes (GCEs) was calculated to be 1.54 × 10 −19 M (D L = 3σ/k), which was six orders of magnitude lower than that of 2H-MoS 2 (1.46 × 10 −13 M). And 1T-MoS 2 -based electrochemical detection method also exhibited superior selectivity towards other ten ions selected because of the high affinity between Hg and S. The stability and reproducibility of the new method was impressive as well, and the recovery rates using spiked real water samples were all in the range of 99.8–101.2% due to the superb sensitivity. All results proved that the metallic 1T-MoS 2 nanosheets a promising material for electrochemical detection of mercury ions.
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JOURNAL OF POWER SOURCES
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2020
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IF 8.247
Haishun Jiang,Kenan Zhang,Wenyao Li,Zhe Cui,Shu-Ang He,Siyu Zhao,Jun Li,Guanjie He,Paul R. Shearing,Dan J.L. Brett
It is important to develop a low-cost and easy-prepared electrocatalyst for hydrogen evolution reaction . In this work, MoS 2 /NiS hierarchical nanostructures (HHs) were fabricated on Ni foam by a simple one-step hydrothermal reaction using Ni foam as raw materials directly. Owing to the unique synthetic strategy that provide uniform MoS 2 /NiS HHs structure on the porous Ni foam, generate abundant active surfaces, small resistance, furthermore it is beneficial for carrier migration and contributing to a large number of active sites. Excellent electrocatalytic performances are obtained such as an overpotential of only ~84.1 mV to reach the current density of 10 mA cm −2 , a Tafel slope of 76.9 mV dec −1 and a small inherent resistance of 6.33 Ω. More importantly, a quick current response under multistep potentials is realized and an excellent stability retained after 3000 cycles of CV test. Besides, a DC power to supply a device (MnMoO 4 //MoS 2 /NiS HHs B) under 1.6 V can generate a current density of 21 mA cm −2 , demonstrating its practical application.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Senchuan Huang,Yuying Meng,Yangfei Cao,Fen Yao,Zhujie He,Xuxu Wang,Hui Pan,Mingmei Wu
Heazlewoodite nickel sulfide (Ni 3 S 2 ) has become attractive for electrocatalytic hydrogen evolution reaction (HER). However, strong sulfur–hydrogen bonds (S–H ads ) formed on the surface of Ni 3 S 2 greatly hinder the H ads desorption and reduce HER activity. Herein, amorphous NiWO 4 nanoparticles-decorated Ni 3 S 2 electrocatalysts (NiWO 4 /Ni 3 S 2 ) have been constructed via a two-step hydrothermal method. The heterostructures exhibit much better HER performance than original Ni 3 S 2 by delivering current densities of −10 and −100 mA cm −2 at low overpotentials of 136 and 274 mV, while those for Ni 3 S 2 are 234 and 424 mV, respectively. Moreover, they display ultra-long stability of 75 h. Theoretical calculation proves the improved activity of NiWO 4 /Ni 3 S 2 heterostructures is attributed to highly active interfaces between amorphous NiWO 4 nanoparticles and Ni 3 S 2 electrocatalysts. The strong electronic interaction between NiWO 4 and Ni 3 S 2 decreases the local electron density of Ni and S atoms, facilitates water adsorption on Ni-sites and optimizes hydrogen atom adsorption/desorption on adjacent S-sites with weakened S–H ads .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Jie Yue,Meng Yuan,Xuan Zhang,Guochang Wen,Guina Ren,Bo Ge,Limin Zhao,Xin Shao
Due to its porous structure, hydrophobic modified three dimensional melamine sponge (MS) was commonly used for high efficiency oil/water separation. Nevertheless, it does nothing to water-soluble pollutants. In order to deal with residual pollutants, the direct Z-scheme BiOI/CdS composites was constructed and loaded onto the melamine sponge which easily achieved efficient degradation and selective deoiling. Furthermore, traditional hydrophobic methods (such as grafting mercaptan, silanes and so on) had several drawbacks, hence a novel metal organic frame material ZIF-8 was adopted in order to attain the purpose of superhydrophobic . In this work, it has shown that the cyclic photodegradation efficiency of superhydrophobic BiOI/CdS/ZIF-8 melamine sponge (BCZ MS) could still achieve 92% after performing 4 cycles of degradation and the results indicated that BCZ MS has preeminent stability. Besides, it was verified by the capture experiment that the main active species was O 2 − .
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JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2020
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IF 3.209
Rongying Luo,Hai Han,Jia Liu,Dongsheng Xu,Qiqin Wang,Salvatore Fanali,Zhengjin Jiang
A novel chiral stationary phase (CSP), based on a monolithic organic polymer chemically modified with teicoplanin, was fabricated within a 100 μm I.D. fused silica capillary. The teicoplanin was firstly derivatized with 2-isocyanatoethyl methacrylate (ICNEML) and then thermally co-polymerized with the crosslinker ethylene dimethacrylate (EDMA) in presence of porogens (methanol and dimethylsulfoxide). The optimal experimental conditions (e.g., concentration and ratio of the reagents), considering enantioresolution and permeability, were systematically investigated. The prepared monolith was evaluated using scanning electron microscopy, and the column exhibited quite good morphology. In order to further evaluate the enantioresolving power of the poly(ICNEML-teicoplanin- co -EDMA) monolith, a series of basic and acidic chiral compounds were analyzed using an isocratic mode of polar organic solvents (methanol and acetonitrile) or the same solvents in combination with water (reversed-phase) by nano-liquid chromatography. Five mandelic acids and six derivatized amino acids were enantioresolved under reversed-phase mode ( R s = 1.22–3.47 and α = 1.43–6.33). This monolithic teicoplanin-CSP was also effective in the enantioseparations of 17 amino alcohol drugs employing polar-organic phase mode (MeOH/ACN/TEA/HOAc (80/20/0.03/0.055, v/v/v/v)). Ten of them were baseline enantioresolved (alprenolol, betaxolol, clenbuterol, isoproterenol, metoprolol, pindolol, propranolol, salbutamol, sotalol, tertatolol) ( R s = 1.55–2.48 and α = 1.21–1.55), while the others were partially enantioseparated ( R s = 1.14–1.48).
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PubMed
高影响因子
Energy Storage Materials
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2020
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IF 16.28
Sha Li,Pan Xu,Muhammad Kashif Aslam,Changguo Chen,Arif Rashid,Gulian Wang,Li Zhang,Bingwei Mao
Li–S batteries have received unprecedented attention owing to their exceptionally high energy density and low cost. Nevertheless, the daunting challenges of insulating properties, soluble polysulfide shuttling, drastic volume change and sluggish polysulfide conversion kinetics, still hinder their application towards commercialization . Very recently, exciting progresses have been made on inorganic/organic polar hosts as either polysulfide immobilizers or polysulfide redox accelerators, targeting durable Li–S batteries. Herein, self-assembled NiCo 2 S 4 granules comprising secondary open-hole tubular structures are first devised as highly-efficient host materials for high-sulfur-loading and durable Li–S batteries. NiCo 2 S 4 hosts are featured with their large porosity, high electronic conductivity , rapid ion conduction, strong polysulfide immobilization capability and catalytic effect on polysulfide redox, thus greatly ameliorating the polysulfide-shuttle issue and accelerating the polysulfide conversion kinetics. Therefore, the NiCo 2 S 4 /S cathode shows a reversible capacity of 1387 mAh g −1 at 0.2C and retains a value of 543 mAh g −1 after 500 cycles at 2 C. Impressively, the NiCo 2 S 4 /S cathode with a sulfur loading of 8.9 mg cm −2 exhibits high areal capacity of 8.3 mAh cm −2 , low polarization and high cycling stability. Moreover, the as-derived soft-package battery with a 4.5 mg cm −2 sulfur loading can power 169 light-emitting diodes, verifying its great potential for practical application.
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CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Qiqin Wang,Kun Peng,Ning Gan,Xiao Liu,Hao Huang,Huikai Shao,Hanying Jin,Jacques Crommen,Zhengjin Jiang
Zwitterionic super-hydrophilic polymers showed fascinating prospects because of their excellent biocompatibility, and antifouling characteristics. However, their commercial development and the application in different fields were limited by their tedious preparation process, unsatisfactory reproducibility and performance. In this study, a rapid fabrication approach based on a sole-monomer system (2-(methacryloyloxy)ethyl-[ N -(2-methacryloyloxy)ethyl]phosphorylcholine (MMPC) was simultaneously employed as monomer and crosslinker) was proposed for preparing the cell membrane biomimetic polymers within only 1 h, which is significantly faster than the conventional multi-monomers based approach (~12 h). Furthermore, the proposed strategy turns out to be very simple, time saving and reproducible. The super-hydrophilicity, excellent separation efficiency, biocompatibility and antifouling ability were also achieved on the resulting biomimetic polymers. It is worth noting that the versatile biomimetic polymers exhibited excellent enrichment capacity for N -glycopeptides or C-reactive protein (CRP) from complex biological matrices as well as great separation performance for small bioactive molecules although the PC analogous moiety is located in the middle of the MMPC molecule. In particular, a quite similar binding mode exists between the MMPC dimer and the natural PC ligands to CRP. Therefore, the sole-monomer system can not only simplify the preparation process and improve the reproducibility of the zwitterionic materials, but also combine the advantages of the biomimetic cell membrane surface and the zwitterionic super-hydrophilic polymers for the separation of biomolecules in complex biological fluids.
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ACS Applied Energy Materials
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2020
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IF 4.473
Yapeng He,Panpan Zhang,Hui Huang,Xiaobo Li,Xinhua Zhai,Buming Chen,Zhongcheng Guo
The development of an efficient metal sulfide cathode is of great importance and an ongoing challenge for the practical application of an aqueous rechargeable Ni-Zn battery. Herein, Ni3S2 nanosheets with abundant sulfur vacancies (r-Ni3S2) have been successfully prepared via hydrothermal reaction and surface engineering, which are further employed as the binder-free cathode of the aqueous Ni-Zn battery. Benefitting from the features of substantially improved electrical conductivity, low band gap, abundant active sites, and good intrinsic capacity, the r-Ni3S2 electrode delivers an impressive reversible specific capacitance (1621.6 F g–1 at 0.2 A g–1) and extraordinary rate capability (62.1% retention under 8 A g–1). Moreover, the aqueous rechargeable r-Ni3S2//Zn battery exhibits a remarkable specific capacity (240.8 mAh g–1 at 1 A g–1) and preeminent cycling durability (only 8.4% decay after 3000 cycles). Besides, a glorious energy density of 419.6 Wh kg–1 together with a peak power density of 1.84 kW kg–1 could be achieved, surpassing a significant percentage of the reported Ni-Zn batteries. The results reveal that the r-Ni3S2 cathode with abundant sulfur vacancies and the adopted facile approach possesses huge promotion potential for Ni-Zn batteries and is promising to numerous electronics and electric vehicle applications in the future.
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ACS Sustainable Chemistry & Engineering
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2020
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IF 7.632
Yuan Lin,Qiao Zhang,Yuhang Li,Yunpeng Liu,Kejia Xu,Jiangnan Huang,Xiaosong Zhou,Feng Peng
An incompletely covered CdS/ZnS core/shell is synthesized via a simple hydrothermal method. Due to the defect energy levels introduced by zinc vacancies, the typical type-I heterojunction of CdS/ZnS evolves to a type-II heterojunction and Z-scheme hybrid structure so that the ZnS shell can timely transfer and capture the photogenerated holes from the CdS core. The surface photovoltage (SPV) distribution caused by photogenerated charges on the surface of catalyst is visually presented by Kelvin probe force microscopy with synchronous illumination (microscope SPV). It intuitively proves the effective spatial separation of photogenerated holes from the CdS core to the ZnS shell, for the first time. Under optimal conditions, the highest hydrogen production rate of CdS/ZnS reached 24.1 mmol g–1 h–1 under visible light illumination. The average apparent quantum yield of 9.3% can be achieved for 9 h of illumination (λ = 420 ± 5 nm). It exhibits highly efficient photocatalytic H2 evolution with well stability.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Xingliang Chen,Tao Shi,Guanglei Wu,Yun Lu
The MoS 2 @polypyrrole@Fe 3 O 4 composite was skillfully synthesized via a novel one pot method. No any separation step during the synthesis process, and the Fe 2+ was successively utilized to prepare the Ppy and Fe 3 O 4 , which can achieve a high utilization of raw materials. The characterization about microstructure, crystal form, elemental composition and surface functional groups verify the structure of MoS 2 @polypyrrole@Fe 3 O 4 . Its hysteresis loop indicates that the composite performs typical soft magnetism behavior, with a magnetic saturation value of 20.3 emu.g −1 , which is helpful to improve the magnetic loss for EM wave absorbing. The reflection loss curve suggested that the composite exhibits superior EM wave absorption performance, with a minimum reflection loss value of –32 dB at the specimen thickness of just 2.0 mm due to the fair electromagnetic matching, interface polarization and interface relaxation. In addition, the one pot method used in this work can promisingly be applied to prepare other similar composites such as carbon fiber@polypyrrole@Fe 3 O 4 , graphene@polypyrrole@Fe 3 O 4 .
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CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Meng Yao,Ao Liu,Chunxian Xing,Bosen Li,Shanshan Pan,Jiahe Zhang,Peipei Su,Haitao Zhang
Supercapacitors have emerged as appealing alternatives to rechargeable energy storage devices in renewable energy generation and storage systems due to their ultra-high power characteristics. However, their broad applications are hindered by their low energy density characteristic. Therefore, the designs of electrodes with high rate and high specific capacitance and electrolytes with wide-potential window are extremely crucial. A novel core–shell heterostructure, TiNb 2 O 7 as the core and C-encapsulated MoS 2 as the shell, was demonstrated. As a result of synergistic effects induced by the core–shell heterostructure, this nanoarchitectural anode exhibited a high rate capability and an excellent cyclic stability, 99% capacity was retented after 500 cycles. Moreover, a nanocomposite ionogel electrolyte composed of ionic liquid (IL), poly(vinylidene fluoride-co-hexafluoropropene)-hexafluoropropylene (PVDF-HFP) and SiO 2 was prepared. In our study, optimized solid lithium-ion capacitors (SLICs) exhibited an impressive energy density of 147.2 Wh kg −1 at 60 °C and an outstanding ultra-long term stability, 93.7% capacity was retented after 10,000 cycles at 1 A g −1 . These outstanding performances could be ascribed to the widened potential window and remarkable ionic conductivity of the ionogel electrolyte. The effective combination of nanoarchitectural anodes and a nanocomposite ionogel provides a novel and profound direction for the fabrication of highly safe and reliable solid lithium-ion capacitors with an enhanced high energy density.
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危险品化学品经营许可证（带存储）