JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Hui Xu,Pengdong Chen,Yuanqiang Zhu,Yuanhai Bao,Ji Ma,Xuefang Zhao,Yong Chen
Because of high electrical conductivity, theoretical capacity, and numerous redox pairs, NiCo 2 S 4 has sparked a lot of interest in energy storage. In the paper, with citric acid as inductive agent, NiCo 2 S 4 mesoporous microspheres have been successfully prepared via solvothermal approach by regulating the solvent ratio (water/ethanol ratio = 1/3). It reveals that citric acid dominate in the nucleation and orientated growth of NiCo 2 S 4 and the morphology of NiCo 2 S 4 with different submicron structures can be tuned by the ratio of water/ethanol. The morphology, structure, and electrochemical properties of all NiCo 2 S 4 samples have been investigated. Among these samples, NiCo 2 S 4 mesoporous microspheres display the best electrochemical properties due to their unique mesoporous structure and high specific area. It has a high discharge capacity of 857C/g at a current density of 1 A/g, and exhibit exceptional rate capability (80 % retention even at 20 A/g). Additionally, when employed as positive of an asymmetric NiCo 2 S 4 //active carbon (AC) supercapacitor, it yields an energy density of 48.7 Wh kg −1 at 801 W kg −1 and 81 % capacity retention after 10,000 cycles at a current density of 5 A/g. The work describes a quick and easy way to increase the performance of NiCo 2 S 4 electrode materials and demonstrates its potential in practical application.
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OPTICAL MATERIALS
·
2022
·
IF 3.754
Yarong Gu,Yutao Jiang,Jingqi Chen,Chenqi Gao,Lingyan Feng,Jinbo Wu,Lijuan Zhao
Chiral inorganic nanomaterials provide a platform for a variety of applications. Chiral ligands are commonly used to induce chiroptical activity of nanoparticles through chiral transfer, while few materials have intrinsic chirality and the origins of their chirality are unclear as well. Here, several hexagonal copper sulfide (CuS) structures with achiral morphology which showed negative circular dichroism (CD) signals are reported. Although these CuS structures had variable maximum of anisotropic g-factor, the wavelength dependence of g-factor due to the structure-dependent chiroptical activity were similar for all these CuS structures, indicating that the negative CD activity could derive from some common microstructure in CuS. The simulation based on density functional theory (DFT) and time-dependent DFT (TDDFT) revealed that the CD may originate from (Cu 3 S 3 ) 2 nanostructure existing in hexagonal CuS. The enantio-selective catalysis of these homochiral CuS structure for oxidation of d -DOPA and l -DOPA was also investigated. All samples exhibited preferential catalysis of l -DOPA, which is conducive to distinguishing l -DOPA from d -DOPA. This work not only reveals the origin of CD in CuS inorganic structures with achiral morphology for the first time, but also provides a profound insight of applications of homochiral CuS structures in catalysis.
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ENVIRONMENTAL TECHNOLOGY
·
2022
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IF 3.475
Mingxing Chen,Qinming Guo,Jinping Cui,Weiyang Lv,Yuyuan Yao
Developing high-performance adsorbent for hexavalent chromium (Cr(VI)) elimination presents an enticing prospect in environmental remediation. Herein, three-dimensional flowerlike nanospheres composed of molybdenum disulphide and polypyrrole (MoS2@PPy) were successfully prepared via a one-pot hydrothermal and subsequent carbothermal reduction process for the removal of Cr(VI). The effects of pH, adsorbent dosage, co-existing ions, initial Cr(VI) concentration and temperature were investigated systematically by batch experiments. Benefiting from the incorporation of MoS2, the obtained MoS2@PPy composites showed a dramatic increase of specific surface area (149.82 m2·g−1) and adsorption capacity (230.97 mg·g−1) when compared with the pure PPy nanoparticles. Based on the thermodynamics study and X-ray photoelectron spectroscopy analyses, the removal process of Cr(VI) was proved to be exothermic and spontaneous, and accessible under-coordinated Mo(IV) and pyrrolic N groups coupled with redox reactions were conducive to the efficient removal of Cr(VI). Attractively, the MoS2@PPy acted as the electron donor could also activate peroxymonosulphate for the efficient degradation of organic contaminants. These results suggested that the MoS2@PPy was promising in Cr(VI) elimination and other kinds of organic pollutants removal in wastewater.
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PubMed
高影响因子
ANALYTICAL LETTERS
·
2022
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IF 2.267
Miaomiao Tian,Liping Zhao,Ya Wang,Gang Liu,Peng Zhang
Bimetallic Pt/Ag nanoparticles (Pt/Ag NPs) were synthesized using 3-hydroxyphenyl-boronic acid as the reducing and stabilizing agent by a simple, one-step hydrothermal method. The bimetallic Pt/Ag NPs were demonstrated to possess intrinsic peroxidase mimetic catalytic activity for the luminol/H2O2 reaction to generate chemiluminescence (CL). The catalytic properties of the bimetallic Pt/Ag NPs were thoroughly investigated. The results showed that the combination of Pt and Ag greatly enhanced the chemiluminescence which is attributed to their synergy. Moreover, the prepared bimetallic Pt/Ag NPs exhibited superior peroxidase mimetic activity to horseradish peroxidase and were stable under a wide range of pH values and temperatures. Using the bimetallic Pt/Ag NPs as the catalyst, a novel chemiluminescence sensor was developed for the determination of glucose with a linear range from 1 to 500 µM and a detection limit of 0.35 µM. The developed method was successfully employed to determine glucose in human serum with satisfactory results. Bimetallic Pt/Ag NPs with peroxidase mimetic catalytic activity have promising applications for determination of glucose in clinical samples.
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POLYMER BULLETIN
·
2022
·Vol. 80
·期 7
·7927-7947
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IF 2.843
Wang Qian,Zhu Sining,Xi Chen,Zhang Fan
A novel crosslinked hyperbranched polyamide-amines adsorbent (CHAP-SH) with sulfhydryl functional groups was synthesized by modifying thiourea and its selective adsorption properties for Cu (II) were studied. The adsorption of coexisting ions showed that the CHAP-SH had high adsorption capacity and selectivity for Cu (II). The adsorption characteristics and mechanism of the CHAP-SH for Cu (II) were systematically investigated. The results of shake flask adsorption experiments indicated that the adsorption procedure was well adapted to the Langmuir isotherm and pseudo-second-order kinetics models, and the maximum adsorption capacity of Cu (II) was 158.48 mg/g at pH = 5.0 and 45 ℃. The adsorption mechanism of the CHAP-SH for Cu (II) was mainly the synergistic interaction with –NH, –COO − , and –SH functional groups. After seven adsorption/desorption cycles, it could still maintain a high removal rate, which provided great potential for the development of multiple novel and reusable immobilized functional materials to efficiently isolate the Cu (II) ions.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Yingxia Dong,Xiaoqiu Yue,Yu Liu,Qiaoji Zheng,Zhiqin Cao,Dunmin Lin
High-performance supercapacitors have attracted considerable interests due to their high-power density, fast charge/discharge process and long cycle life. However, the wide application of supercapacitors is limited by their low energy density. Herein, the hierarchical core–shell structured NiCoP@NiS nanoarrays have been successfully synthesized by using the vertically grown nickel–cobalt bimetallic phosphide (NiCoP) nanowire as the core and the nickel sulfide (NiS) by electrodeposition as the shell. As the “super channel” for electron transfer, the NiCoP core is coupled with the NiS shell to promote rapid diffusion of electrons and improve cycle stability of the electrode. Consequently, the optimized NiCoP@NiS nanoarrays display an extremely good specific capacitance (2128F g -1 at 1 A g -1 ) and a superior long cycle life (the capacitance retention of 90.36 % after 10,000 cycles). A hybrid supercapacitor (HSC) has been assembled using the NiCoP@NiS as the positive and the activated carbon (AC) as the negative, which displays a superior energy density of 30.47 Wh kg −1 at a remarkable power energy of 800 W kg −1 . This study shows that the prepared hierarchical core–shell structured nanoarrays have great prospects as a novel electrode material in energy storage.
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高影响因子
HYDROMETALLURGY
·
2022
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IF 4.217
Chaopeng Liu,Zhongxian Song,Yanli Mao,Xiaole Yan,Zhaoyang Li,Yuzhong Liu,Mengxia Ma,Haiyan Kang,Xu Yan,Deming Gu,Xia Zhang,Zhenzhen Huang
A thiourea-modified weak base anion exchange resin, ZGA451 (thiourea@ZGA451), was prepared. Thiourea@ZGA451 exhibited excellent potential for Au(III) adsorption. The maximum adsorption capacity of Au(III) by thiourea@ZGA451 was 995.6 mg/g at 298 K. The adsorption process followed the Freundlich and pseudo-second-order models, which are monolayer and chemisorption adsorption, respectively. The adsorption mechanism of Au(III) on thiourea@ZGA451 involves electrostatic attraction, chelation, and redox. Thermodynamic experiments showed that the reaction exhibited spontaneous endothermic behavior. Thus, thiourea@ZGA451 possesses outstanding Au(III) adsorption properties.
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高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
S. Yang,Y. Cheng,T. E,Y. Wang,L. Liu,Y. Li,D. Wang,J. Qian
The inert substrate surface of MoS 2 leads to unsatisfactory adsorption performance. Herein, an inert substrate surface activation strategy is proposed, and the resulted MoS 2 /montmorillonite (MMT) prepared via the hydrothermal method is immersed with NaF (F–Mt). The intercalation of Na + contributes to inducing the transformation of MoS 2 from 2H phase to 1 T phase, thereby providing a large number of S vacancies and exposing available Mo 4+ . Meanwhile, the surface of MMT is activated due to the fact that partially [Si 4 O 10 ] 4- are etched by F - , which facilitates forming Si–O–Mo bonds to promote the charge transfer. The improved charge transfer rate can make S 2- in MoS 2 accumulate more negative charges, greatly enhancing the adsorption capacity to Pb 2+ . Moreover, the natural negative potential on the surface of MMT solves the problem of easy stacking for nanosheets , improving the availability of active sites on the edge, which are also benefit from the etching effect on MoS 2 nanosheets with NaF. The maximum adsorption capacity achieves 97.09 mg/g. Additionally, density functional theory (DFT) calculations confirm the resulted S vacancies in MoS 2 are in favor of removing Pb 2+ , which is also contributed by the electrostatic and chemical adsorption with MMT. Therefore, it suggests that F–Mt is an excellent adsorbent for Pb 2+ .
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 39
·2203528
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IF 19.924
Qiuni Zhao,Wenzhe Zhou,Mingxiang Zhang,Yang Wang,Zaihua Duan,Chaoliang Tan,Bohao Liu,Fangping Ouyang,Zhen Yuan,Huiling Tai,Yadong Jiang
Endowed with rich terminal groups, good electrical conductivity, and controllable structure, transition metal carbides/nitrides (MXenes) have attracted extensive attention for potential application in gas sensor, but long-standing challenges of the MXenes (titanium carbide as the representative) are their limited selectivity and sensitivity. Herein, a high-active double transition-metal titanium molybdenum carbide (Mo 2 TiC 2 T x ) with superstrong surface adsorption (−3.12 eV) for NO 2 gas molecule is proposed, and it is further coupled with molybdenum disulfide (MoS 2 ) by interface modulation to construct an edge-enriched heterostructure. Due to the synergistic effect of strong adsorption, rich adsorption sites, and coupling interface of Mo 2 TiC 2 T x /MoS 2 composite, the as-fabricated Mo 2 TiC 2 T x /MoS 2 gas sensor exhibits an outstanding response toward NO 2 with high selectivity against various interference gases, which is well supported by density functional theory calculations. Meanwhile, the sensor exhibits a sensitivity of 7.36% ppm −1 , detection limit of 2.5 ppb, and reversibility at room temperature. A portable, wireless NO 2 monitoring system is demonstrated for gas leakage searching and dangerous warning based on Mo 2 TiC 2 T x /MoS 2 gas sensor. This work facilitates the gas sensing application of MXenes, and provides an avenue for the development of wireless sensing system in environmental monitoring and safety assurance.
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Biomedical Materials
·
2022
·Vol. 17
·期 4
·045025
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IF 4.103
Mingchao Jin,Juli Zhu,Zhipeng Meng,Xuesheng Jiang,Zhuo Chen,Juntao Xu,Hongliang Gao,Junkun Zhu,Fengfeng Wu
Titanium dioxide (TiO2), as one of the titanium (Ti)-based implants, holds a promise for a variety of anti-bacterial application in medical research. In the current study, a functional molybdenum disulfide (MoS2)/polydopamine (PDA)-LL-37 coating on titanium dioxide (TiO2) implant was prepared. Anodic oxidation and hydrothermal treatment was given to prepare TiO2 nanotubes-MoS2/PDA-LL-37 (T-M/P-L). The in vitro osteogenic effect of T-M/P-L was evaluated by measuring mesenchymal stem cell (MSC) adhesion, proliferation, alkaline phosphatase (ALP) activity, extracellular matrix (ECM) mineralization, collagen secretion and osteoblast-specific messenger RNAs (mRNAs) expression. The determination on the anti-bacterial ability of T-M/P-L was followed. Furthermore, the ability of T-M/P-L to promote bone formation in vivo was evaluated. Near-infrared (NIR) laser irradiation exposure enabled the T-M/P-L coating-endowed Ti substrates to hold effective anti-bacterial ability. T-M/P-L promoted the adhesion and proliferation of MSCs. In addition, an increase was witnessed regarding the ALP activity, collagen secretion and ECM mineralization, along with the expression of runt-related transcription factor 2, ALP and osteocalcin in the presence of T-M/P-L. Additionally, T-M/P-L could stimulate endothelial cells to secrete vascular endothelial growth factor (VEGF) and promote capillary-like tubule formation. Upon NIR laser irradiation exposure, T-M/P-L not only exhibited efficient in vivo anti-bacterial activity but also facilitated new bone formation. Collectively, T-M/P-L had enhanced anti-bacterial and osteogenic activity under NIR laser irradiation.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xiandi Cui,Zhiquan Yang,Xinyi Zhang,Wanhui Liu,Baosheng Zou,Wenning Liao
As an effective treatment method for uranium removal in wastewater, the application of photocatalytic reduction has attracted extensive attention. To improve the optical performance of Nb 2 O 5 , CdS nanoparticles were introduced via a one-step hydrothermal method. Then the characterization by various methods (e.g. XRD, SEM, TEM, XPS and UV–vis DRS) were used to determine the structural and optical properties of the heterojunction of Nb 2 O 5 nanorod/CdS nanoparticles (NC). It clearly confirmed that the successful construction of the heterojunction widened the visible light absorption range, narrowed bandgap (∼2.11 eV), promoted the charge transfer and enhanced the separation efficiency of photoinduced electron-hole pairs and further improved the photoreduction activity. During the photocatalytic degradation process, the results showed the photocatalyst with the Nb/Cd molar ratio of 1/3 (NC-3) displayed the best removal of U(VI), with a removal efficiency of 97% in 90 min adsorption and 150 min visible light irradiation at the pH=6. The NC-3 photocatalyst was relatively stable and exhibited good recyclability in during the cyclic experiments. In the end, it was proposed that e - and O 2 - radicals played important roles in the process of the reduction of U(VI).
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Hongshan Wang,Zhenzhen He,Qiangbin Yang,Guangyong Zeng,Zhaomei Yang,Shengyan Pu
MXene nanosheets were functionalized by introducing sodium lignosulfonate (LS) containing abundant hydrophilic groups (sulfonic acid groups and phenolic hydroxyl groups), along with the intercalation of MoS 2 nanosheets between the functionalized MXene layers. A pressure-assisted self-assembly was utilized for the fabrication of a two-dimensional (2D) MXene membrane with high water permeation and excellent dye separation characteristics. The MoS 2 @LS-MXene composite membrane has excellent pure water flux (188.1 L·m -2 ·h -1 ), which is 85% higher than that of the unfunctionalized MXene membrane, and has a good rejection effect on dye molecules (93% for Congo red (CR), and 99% for Rhodamine B (RhB)). The appropriate interlayer spacing and negative surface charge resulted low rejection of salts (4.2% of NaCl, 4.6% of Na 2 SO 4 ) in dye-salt hybrid system, consequently leading to their mutual separation. The composite membrane also exhibits excellent stability and anti-fouling ability. This study provides a simple and novel design idea for the preparation of high-performance 2D MXene membrane.
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