MATERIALS TECHNOLOGY
·
2020
·
IF 1.738
Ruonan Zhang,Leilei Zhang
To improve the surface bioactivity of carbon/carbon composites, functionalized carbon nanotube-gelatin-Zn doped hydroxyapatite (FIC-GL-ZnH) composite coatings were fabricated on carbon/carbon composites by a combination method of chemical vapor deposition, soaking and electrochemical deposition method. The morphology, bonding strength and in-vitro bioactivity of composite coating were investigated. Results showed that the functionalized carbon nanotube-gelatin could not only bond with the carbon/carbon composite substrate tightly by in-situ grown mode but also provide a three-dimensional network structure for the infiltration of Zn doped hydroxyapatite. The FIC-GL-ZnH coating with spherical shape had excellent bonding strength, which was about 2.3 times higher than that obtained for Zn doped hydroxyapatite coating. In-vitro bioactivity test demonstrated that the FIC-GL-ZnH coating could induce the formation of bone-like apatite with particle shape, exhibiting good in-vitro bioactivity. It was suggested that the FIC-GL-ZnH coating might be an effective method to improve the surface bioactivity of carbon/carbon composites.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Sinian Yang,Yuting Li,Hongxia Du,Yuqiu Liu,Yanhong Xiang,Lizhi Xiong,Xianming Wu,Xianwen Wu
Challenges with the Zn anode for aqueous zinc ion batteries have hindered their practical applications, such as uncontrollable formation of the Zn dendrite and serious side reactions. Herein, we fabricate a flexible coating layer with porous and conductive carbon networks (Cu@CNFs) by a simple electrospinning method to construct a stable Zn anode. It can uniformly distribute the charge, regulate the Zn2+ flux, and stabilize the zinc anode. Moreover, the zincopilic Cu nanoparticles (CuNPs) in the coating layer act as nucleation seeds to facilitate the homogeneous deposition of Zn and inhibit its dendrite growth. Density functional theory calculations have further demonstrated the zincophilicity of the CuNPs seeds. As a result, the Cu@CNFs-Zn anode demonstrates a lower nucleation overpotential (58.3 mV at 5.0 mA cm–2) and a higher Coulombic efficiency compared with bare Zn and CNFs-Zn anodes. Remarkably, the Cu@CNFs-Zn anode can provide a stable cycle over 2200 h at 1.0 mA cm–2 with a capacity of 1.0 mAh cm–2. Moreover, the Cu@CNFs-Zn//V2O5 battery achieves a superior cyclability up to 1000 cycles at 0.5A g–1, which is attributed to the large surface areas of CNFs and the zincophilicity of the Cu@CNFs coating.
研究领域:
材料科学
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储能
·
电化学
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纳米材料
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电池技术
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高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2018
·Vol. 27
·期 7
·3750-3761
·
IF 1.34
Shen Xixun,Sheng Junwei,Zhang Qinghui,Xu Qunjie,Cheng Danhong
The zinc (Zn) and Zn/graphene oxide (Zn/GO) composite coatings on the mild steel were fabricated by direct current electrodeposition from an acidic chloride bath without GO and that with four different concentrations (50, 100, 200 and 300 mg/L) of GO, respectively. The GO first is synthesized by using the typical Hummer method. Physical characterizations including the surface and cross-sectional morphology, chemical composition and crystal structure of the Zn and Zn/GO composite coatings were done by scanning electron microscope, energy-dispersive x-ray and x-ray diffraction. The crystalline size, texture coefficient, water contact angle and hardness of the Zn and Zn/GO composite coatings were measured. The corrosion behavior of the Zn and Zn/GO composite coatings was studied by the electrochemical corrosion tests including the potentiodynamic polarization test and the electrochemical impedance spectroscopy test and the immersion test. The result reveals that the corrosion resistance of the Zn coating is remarkably increased by the incorporation of GO. Furthermore, it does not show a linear increase with the increase in the amount of incorporated GO and an optimal corrosion resistance is provided by the Zn/GO composite coating attained from the electrolyte containing 100 mg/L GO. The influence of the incorporation of GO on the corrosion resistance of the Zn coating is explained in combination with their physical characterizations.
研究领域:
材料科学
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腐蚀工程
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电化学
·
表面工程
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高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 6
·2202128
·
IF 9
Xiaopeng Zhou,Jiejun Ren,Wenlei Cao,Andries Meijerink,Yuhua Wang
Colloidal indium phosphide quantum dots (In(Zn)P/ZnS QDs) show potential for application in the field of light emitting diodes (LED) and Mini/Micro-LEDs displays due to their tunable emission and low toxicity. However, the performance of blue-emitting indium phosphide QDs is still lagging behind that of red and green. Herein, a facile method to overcome this difficulty is proposed. The highly active Zn(ClO 4 ) 2 precursor is injected into the reaction mixture during the nucleation process to enhance zinc incorporation, which generates the In(Zn)P alloy QDs with enlarged bandgap. At the same time, the increase of zinc content can inhibit excessive growth of In(Zn)P QDs, and significantly improve its size distribution. The monodisperse In(Zn)P/ZnS QDs exhibit excellent blue emission (466 nm) and have the narrowest full width at half maxima (41 nm) of blue emission In(Zn)P QDs ever reported. This work provides a feasible and effective strategy for obtaining narrow-band blue-emitting In(Zn)P/ZnS QDs.
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高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 10
·期 4
·2201817
·
IF 6.389
Junfeng Zhang,Haotian Liu,Weikang Zhu,Bin Chen,Runfei Yue,Shuoyao Yin,Na Xie,Ran Li,Yan Yin
The design of the efficient, flexible air electrode for enhancing the Zn-air batteries (ZABs) performance is vital in developing a new portable rechargeable power supply. Emerging research indicates that non-precious metal materials have promising activity for oxygen reduction/evolution in alkaline conditions while constructing a high-performance and reliable electrode is still a big challenge at the present stage. In this work, a bimetal doped zeolitic imidazolate framework (ZIF) film is synthesized by fast current-driven synthesis (FCDS) on a thin carbon nanotube film (CNTF). After carbonization at 950 °C, CoFe-N-C nanofoam formed on the CNTF, resulting in binder-free, flexible electrodes. It exhibits excellent activity and stability toward oxygen reduction and evolution. The CoFe-N-C/CNTF-based liquid-state ZAB shows an output power density of 294 mW cm −2 . When applied in solid-state ZAB, the flexible battery shows high power density and excellent cycling stability.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xingxing Gu,Yixun Du,Zhengmao Cao,Fengcan Ma,Jieyuan Li,Qinghong Wang,Chao Lai
Aqueous zinc batteries are regarded as one of the promising next-generation energy storage batteries due to their high safety and low cost, however, one of the most important problems limiting their commercialization is the cyclic stability of the zinc anode. Therefore, in this work, we first employed hexamethylenetetramine (HMT) as the electrolyte additive to in-situ construct a Zn-HMT complex film to stabilize the zinc anode. After adding the HMT, its zincophilic head will be prior to adsorbing on the zinc foil to form Zn-HMT complex film and then introduce uniform zinc deposition, and simultaneously the formed Zn-HMT complex with hydrophobic alkyl tail will repel the H 2 O from combining with Zn 2+ to form Zn 4 SO 4 (OH) 6 · nH 2 O by-product as well as the hydrogen evolution reaction (HER). As a result, the HMT-based electrolyte promotes ultra-stable zinc anode cycling for as long as 2000 h with extremely high average Coulombic efficiency (99.51 %). When applied in the Zn-V 2 O 5 full cell, it also demonstrates outstanding electrochemical performances with a reversible capacity as high as 197.8 mAh/g after 500 cycles. This work provides a simple and effective method for the implementation of high-safety and high-stable aqueous zinc-ion batteries.
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Rui Zhao,Xiufeng Cao,Xinxin Li,Tao Li,Hong Zhang,Xiaowei Cui,Zhaojie Cui
This study aimed to investigate the combined ecotoxicological effects of Cd, Pb, Zn, Hg and regulation mechanisms in Solanum nigrum L. In this work, the co-exposure of these four heavy metals hindered the transformation of Cd, Zn, and Hg (except Pb) from available to non-available chemical forms. Individual Cd, Pb, Zn and Hg induced the oxidative damages to S. nigrum L., while their combination further enhanced this ecological toxicity. By internal regulation, the ecological toxicity of metals to S. nigrum L. could be alleviated to a certain extent. Specifically, S. nigrum L. was a hyperaccumulator of Cd with BCF ＞1. Moreover, since BCFroot of Pb, Zn and Hg were all greater than BCFshoot, S. nigrum L. could accumulate Pb, Hg and Zn mainly in plant roots, which was beneficial for the detoxification of plants. Meanwhile, the immobilization by cell wall (the proportions of Cd, Pb, Zn and Hg in the cell wall were 54.46–84.92%, 38.33–49.25%, 48.38–56.19% and 45.97–63.47% in low metal concentration treatments) and the sequestration in vacuole (the proportions of Cd, Pb, Zn, and Hg in the soluble fractions are 50.99–59.00%, 41.05–45.46%, 37.54–61.04% and 33.47–61.35% in high metal concentration treatments) also act as important detoxification pathways. The external regulation was mainly the changes of soil microbial communities influenced by plants. Specifically, the richness and diversity of bacteria in rhizosphere soil were increased, and roots of S. nigrum L. recruited some potentially beneficial microbials. This study provided a theoretical basis and guidance for S. nigrum L. as a phytoremediation plant under combined heavy metal pollution.
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Zhuo Sun,Juan Lu,Xin Zhang,Xiangyu Shan,Qian Wu,Chao Li,Huiling Li,Shuning Yang,Li Tian
In this work, Zn-MOF electrospun nanofibres (Zn-MOF NFs), CdTe and Au@Pt-rGo were applied to Ru(bpy) 3 2+ /tri- n -propylamine electrochemiluminescence (ECL) system. And a novel ECL sensor for the determination of fenpropathrin was constructed for the first time. Due to the large surface area and pores, Zn-MOF NFs can both carry CdTe and Au@Pt-rGo and promote luminescence by facilitating electron transfer and reducing electron transport paths. CdTe participated in the luminescence reaction and improved the system’s sensitivity together with Ru(bpy) 3 2+ . Au@Pt-rGo can promote electron transport in the system. Under the synergistic effect of the three, the ECL sensor had achieved satisfactory results in weak alkaline solution. The constructed ECL sensor can detect fenpropathrin in the range of 4 × 10 −11 –4 × 10 −6 M, and the detection limit was 1.33 × 10 −11 M (S/N = 3). It can be used to detect fenpropathrin in juice samples, which provided a new idea for determining fenpropathrin.
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高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Guichan Chen,Wenhua Zhang,Yi Wang,Shuxi Wu,Dengjie Chen
Active electrocatalysts are essential for the oxygen reduction reaction (ORR), which plays a crucial role in functionalizing sustainable fuel cells and Zn–air batteries (ZABs). Herein, a nominal perovskite (LaBa0.85Ca0.15Mn2O5+δ) hybrid consisting of single cubic and hexagonal perovskite structures was synthesized by electrospinning. The obtained carbon-supported one-dimensional heterostructured perovskite hybrid (1D-HPH/C) exhibits high onset and half-wave potentials of 0.879 and 0.740 V vs RHE and a high limiting current density of 6.17 mA cm–2 at 1600 rpm, which are superior to those of powder HPH/C and close to Pt/C. 1D-HPH combines the advantages of high specific surface area (14.4 m2 g–1) and optimized intrinsic activity (eg = 1), thus exhibiting outstanding electrocatalytic activity for ORR. This work demonstrates the importance of adjusting microstructure and forming a two-phase heterostructure for promoting electrocatalytic reactions of perovskite electrocatalysts.
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高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2022
·Vol. 28
·期 4
·719-725
·
IF 2.297
Deling Li,Congcong Luo,Bing Yao,Yue Ding,Jizhen Ren
Lanthanum complex with curcumin (La L 2 )/Ca-Zn composite stabilizer was prepared using La L 2 and Ca-Zn stabilizer, in which Ca-Zn stabilizer was obtained from calcium stearate and zinc stearate at their mass ratio of 5:1. The rheological properties and dynamic thermal stability of polyvinyl chloride (PVC) stabilized by La L 2 /Ca-Zn composite stabilizers were estimated through a torque rheometer. The degraded fragments obtained from the torque experiments were measured by Fourier-transform infrared spectroscopy (FTIR) and ultraviolet–visible (UV-vis) spectroscopy. La L 2 had an effective synergistic effect with Ca-Zn stabilizer. Compared with La L 2 , La L 2 /Ca-Zn composite stabilizer could more significantly improve the rheological properties and dynamic thermal stability of PVC. An optimal synergistic effect could be observed when the mass ratio of La L 2 with Ca-Zn stabilizer was about 8:2, in which the plasticizing torque and equilibrium torque of PVC was 33.3 N m and 22.5 N m, respectively, and its dynamic thermal stabilizing time was 25.1 min. The possible thermal stability mechanism of La L 2 /Ca-Zn composite stabilizer for PVC was suggested based on the evaluation of FTIR spectroscopy and UV-vis spectroscopy.
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高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Yongpeng Li,Qun Guan,Jianli Cheng,Bin Wang
The conductivity and structural intrinsic stability of cathode materials are the barriers to achieve high-performance fiber-shaped Zn-ion batteries (FZIBs). Here, amorphous H 0.82 MoO 3.26 coated on carbon nanotubes fiber (noted as CHMO) is exploited as cathode materials for aqueous FZIBs with high energy density , excellent cycle stability and good omnidirectional flexibility. The amorphous H 0.82 MoO 3.26 improves electron transfer and accelerates electrochemical reaction kinetic, as well as effectively suppresses structural degradation during repeated charge/discharge process. Meanwhile, the electrochemical behaviors combined with a series of in-situ/ex-situ characterizations verify that Zn 2+ and H + ions insert/extract into/from the CHMO fiber reversibly at the same time. The assembled battery delivers high energy density of 32.1 mWh cm -3 (based on the volume of cathode) and excellent capacity retention of about 67% after 5000 cycles at 700 mA cm -3 , as well as splendid flexibility (about 91% capacity retention after bending 3500 times). Wearable NO 2 gas sensor and pressure sensor integrated with fiber-shaped Zn//CHMO battery are also fabricated, which can operate stably with stable signal output.
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高影响因子
Energy & Environmental Materials
·
2022
·Vol. 6
·期 2
·e12357
·
IF 13.443
Yuqi Jiang,Kun Ma,Meiling Sun,Yuanyuan Li,Jinping Liu
Hybrid supercapacitors have shown great potentials to fulfill the demand of future diverse applications such as electric vehicles and portable/wearable electronics. In particular, aqueous zinc-ion hybrid supercapacitors (ZHSCs) have gained much attention due to their low-cost, high energy density, and environmental friendliness. Nevertheless, typical ZHSCs use Zn metal anode and normal liquid electrolyte, causing the dendrite issue, restricted working temperature, and inferior device flexibility. Herein, a novel flexible Zn-ion hybrid supercapacitor (FZHSC) is developed by using activated carbon (AC) anode, δ-MnO 2 cathode, and innovative PVA-based gel electrolyte. In this design, heavy Zn anode and its dendrite issue are avoided and layered cathode with large interlayer spacing is employed. In addition, flexible electrodes are prepared and integrated with an anti-freezing, stretchable, and compressible hydrogel electrolyte, which is attained by simultaneously using glycerol additive and freezing/thawing technique to regulate the hydrogen bond and microstructure. The resulting FZHSC exhibits good rate capability, high energy density (47.86 Wh kg −1 ; 3.94 mWh cm −3 ), high power density (5.81 kW kg −1 ; 480 mW cm −3 ), and excellent cycling stability (~91% capacity retention after 30 000 cycles). Furthermore, our FZHSC demonstrates outstanding flexibility with capacitance almost unchanged even after various continuous shape deformations. The hydrogel electrolyte still maintains high ionic conductivity at ultralow temperatures (≤−30°C), enabling the FZHSC cycled well, and powering electronic timer robustly within an all-climate temperature range of −30~80°C. This work highlights that the promising Zn metal-free aqueous ZHSCs can be designed with great multifunctionality for more practical application scenarios.
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高影响因子
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