JOURNAL OF POWER SOURCES
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2019
·
IF 7.467
Xian Wang,Ziyi Zhu,Lulu Chai,Junyang Ding,Li Zhong,Anrui Dong,Ting-Ting Li,Yue Hu,Jinjie Qian,Shaoming Huang
2-dimensional Co nanoparticles embedded in N-doped carbon nanosheets ( NCNS ) are derived from indium-based frameworks which are impregnated with discrete [Co(NH 3 ) 6 ] 3+ ions by high-temperature pyrolysis as a new approach to convert a 3-dimensional porous metal-organic frameworks ( CPM-5 ) to 2-dimensional functional nanosheets. The as-made porous Co, N-doped carbon nanosheets ( NCNS–Co 0.5 In 0.5 ) perform the excellent ORR catalytic activity with a half wave potential of 0.82 V in comparison with the commercial Pt/C. Meanwhile, it also owns good stability and methanol tolerance as a suitable catalyst for zinc-air batteries with a high power density of 132.2 mW cm −2 . This method can easily be extended to other In-based MOFs, including QMOF-2, In-MIL-68, InOF-1 , in which all the corresponding derived materials exhibit efficient ORR performance. Especially, the porous Co, N-doped carbon nanosheets annealed from InOF-1 ( InOF-1-Co-800 ) display an E onset of 0.93 V, a half-wave potential of 0.85V, and a diffusion-limited current of 5.40 mA cm −2 density. Our work provides a new path to tune the morphology and catalytic performance of MOF derivatives.
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高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 6
·966-978
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IF 4.776
Pei Wang,Pan Xiong,Jing Liu,Shuang Gao,Tingfei Xi,Yan Cheng
Magnesium (Mg) alloys have been intensively investigated as potential absorbable coronary stent materials as their use avoids risks such as late inflammation and restenosis generated by permanent metallic implants. Besides that, clinical trials on coronary stents fabricated from Mg alloys have made great progress recently. However, the over-rapid corrosion rate, magnesium corrosion-induced thrombosis formation and delayed endothelium regeneration continue to be problematic for coronary artery stent therapy. In this study, silk fibroin blended with heparin and GREDVY (Gly-Arg-Glu-Asp-Val-Tyr) peptide was immobilized on a HF-pretreated MgZnYNd alloy surface via a polydopamine layer to improve its corrosion resistance, blood compatibility and endothelialization. Standard electrochemical measurements along with the long-term immersion results indicated that the functionalized MgZnYNd alloy had preferable anti-corrosion abilities compared with the bare MgZnYNd alloy. The modified surface exhibited outstanding hemocompatibility with reduced platelet adhesion, hemolysis rate and prolonged blood coagulation time. Human umbilical vein endothelial cell (HUVEC) and vascular smooth muscle cell (VSMC) co-culture results revealed more attached HUVECs on the functionalized samples than on the MgZnYNd alloy surfaces. The excellent corrosion retardation, hemocompatibility and re-endothelialization of the multi-functional coating indicate a promising method in the field of biodegradable magnesium-based implantable cardiovascular stents.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2018
·
IF 0
Haijun Chen,Zhibin Zhang,Xiangxue Wang,Jing Chen,Chao Xu,Yunhai Liu,Zhimin Yu,Xiangke Wang
Magnetic Fe/Zn layered double oxide decorated carbon nanotubes (M-Fe/Zn-LDO@CNTs) composites were synthesized via a hydrothermal method with further calcination treatment. The fabricated M-Fe/Zn-LDO@CNTs were characterized by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, UV–vis spectroscopy, scanning electron microscopy, and transmission electron microscopy and then applied for U(VI) elimination under diversiform experimental conditions, such as pH, temperature, ionic strength, contact time, and coexisting ions. The experimental results demonstrated that the U(VI) adsorption performance of M-Fe/Zn-LDO@CNTs was much higher than bare CNTs. The thermodynamic parameters revealed that U(VI) adsorption on M-Fe/Zn-LDO@CNTs was endothermic and spontaneous. More importantly, the adsorption performance of U(VI) on M-Fe/Zn-LDO@CNTs was still higher than ∼89% after five cycles. Furthermore, ∼95.9% of 241Am(III) could be removed by M-Fe/Zn-LDO@CNTs from solution at pH = 8.0, which confirmed that M-Fe/Zn-LDO@CNTs was an excellent material for efficient removal of long-lived lanthanides and actinides from environmental aqueous solutions in radionuclides’ pollution remediation.
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Polymers
·
2018
·Vol. 10
·期 8
·853
·
IF 2.935
Yongguang Zhang,Zhumabay Bakenov,Taizhe Tan,Jin Huang
A gel polymer electrolyte was formed by trapping an optimized Na+/Zn2+mixed-ion aqueous electrolyte in a polyacrylonitrile nanofiber polymer matrix. This electrolyte was used in a novel aqueous sodium-ion battery (ASIB) system, which was assembled by using a zinc anode and Na4Mn9O18cathode. The nanorod-like Na4Mn9O18was synthesized by a hydrothermal soft chemical reaction. The structural and morphological measurement confirmed that the highly crystalline Na4Mn9O18nanorods are uniformly distributed. Electrochemical tests of Na4Mn9O18//Zn gel polymer battery demonstrated its high cycle stability along with a good rate of performance. The battery delivers an initial discharge capacity of 96 mAh g−1, and 64 mAh g−1after 200 cycles at a high cycling rate of 1 C. Our results demonstrate that the Na4Mn9O18//Zn gel polymer battery is a promising and safe high-performance battery.Keywords:aqueous sodium-ion battery;cathode;gel polymer electrolyte;Na4Mn9O18nanorod;polyacrylonitrile nanofiber
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PubMed
高影响因子
Journal of Materials Chemistry A
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2018
·Vol. 6
·期 38
·18649-18659
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IF 9.931
Zheming Liu,Aiwei Tang,Jun Liu,Dongxu Zhu,Xifeng Shi,Qinghua Kong,Zhijie Wang,Shengchun Qu,Feng Teng,Zhanguo Wang
Multinary copper-based chalcogenides have been exploited in photocatalytic hydrogen generation due to their exceptional visible light absorption properties and environmentally friendly character. Similar to other photocatalysts, to reinforce the charge separation and transfer is one of the most important pathways to enhance photocatalytic hydrogen evolution, which can be achieved by rationally designing the nanostructures and geometries of multinary copper-based chalcogenides. Herein, an improved photocatalytic hydrogen evolution is successfully realized in L-shaped Cu–Ga–Zn–S (CGZS) alloyed nanorods compared with the binary Cu31S16 and ternary CuGaS2 nanocrystals. The L-shaped wurtzite CGZS nanorods with a uniform spatial composition distribution are synthesized via a non-injection solution approach for the first time. The successive incorporation of zinc and gallium ions into Cu31S16 seeds leads to formation of Cu31S16–ZnS and Cu31S16–CGZS heteronanostructures and finally results in the formation of single phase CGZS nanorods. The intrinsic features of L-shaped wurtzite CGZS nanorods offer efficient spatial charge separation and electrical transport, which contribute synergistically to the improved photocatalytic activity. This study provides a new way to develop novel multinary copper-based chalcogenides with flexible nanostructures for efficient photocatalytic hydrogen production.
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高影响因子
Nano Research
·
2024
·
IF 9.5
Zhang Donghao,Si Lianxi,Ren Qianqian,Yan Xintong,Hu Shi
Pd-based catalysts exhibit higher catalytic activity and durability in many electrochemical reactions. However, the electrochemical performance can be further enhanced by fine-tune of the alloy composition. Although binary alloys have been fully studied, the multicomponent alloys are far beyond understanding, which leaves cocktail effect a compromised explanation for the high-entropy alloy. Herein Pd nanosheet-seeded growth was used to synthesize a Pd-Zn-Cd ternary alloy by accurately controlling the Pd-Zn-Cd molar ratio through adjusting the amount of introduced Cd precursor. Through analysis of the crystal phase structure of PdCdZn x and PdZn x Cd 1− x , the competitive relationship of Zn and Cd in the alloying process with Pd was unveiled: Pd 1 Cd 1 intermetallics (IMC) is thermodynamically favored over Pd 1 Zn 1 IMC in the ternary system. However, the increased structure stability of PdCd over PdZn does not bring about increased durability in the catalytic ethanol oxidation reaction. The morphology selection of Pd seeds is also crucial for the study, as Pd cubes, Pd tetrahedrons, and Pd octahedrons do not form PdZn in the same protocol. The successful alloying through the seeded growth depends on the maximum diffusion depth of foreign atoms into the seed.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Lunjie Liu,Zian Xu,Yu Xia,Mei-Yan Gao,Qin Jin,Baobing Zheng,Chongxuan Liu,Shaoqing Chen,Zhe Zhang,Hsing-Lin Wang
Nitrogen (N)-doped carbon materials with porous structures are widespread in electrocatalysis for clean energy and environmental remediation applications. However, the synergistic design of hierarchical porous structures and active sites remains challenging. Here, we present a facile and general strategy of using conjugated microporous polymers (CMPs) as the precursors to create in-situ N-doped nanocarbon electrocatalysts through high-temperature pyrolysis. The obtained hierarchically porous carbon sample of TEPT-TA-800 can retain the nanoparticle morphology and high porosity after carbonization and demonstrates exceptional oxygen reduction reaction (ORR) performance with a positive onset potential of 0.94 V vs. RHE and half-wave potential of 0.85 V vs. RHE in an alkaline electrolyte. Theoretical calculations reveal that with the presence of triazine rings, the binding affinity of the ORR intermediates (*OOH, *O, and *OH) and the stability of adsorbed oxygen on TEPT-TA-800 can be improved, which positively impacts the ORR process. Furthermore, TEPT-TA-800 serves as the cathode to construct a Zn-air battery (ZAB), which exhibits superior peak power density (143.1 mW cm −2 ), higher specific capacity (792 mAh/g), and longer-lasting stability (650 h) compared with Pt/C-based ZAB. These findings provide valuable insights into rationally designing CMP-derived carbon materials for various catalysis reactions and energy conversion applications.
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高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 19
·11669-11680
·
IF 10.7
Tianfang Yang,Bingcheng Ge,XuPo Liu,Zunjie Zhang,Ye Chen,Yang Liu
Exploring effective electrocatalysts for the oxygen reduction reaction (ORR) is of great significance for rechargeable Zn–air batteries (ZABs). In particular, heteroatom-doping in metal-nitrogen-carbon single-atom catalysts (SACs) is considered an effective strategy to promote the electrocatalytic ORR. Herein, we report a practical strategy for designing single-Fe atom decorated S/N-doped carbon (Fe SAs@S/N–C) through the polymerization of phenylenediamine materials as an efficient ORR catalyst for ZABs. The introduction of S facilitates the high-density doping of Fe–N4 active sites, and regulates the adsorption energy of oxygen-containing intermediates by altering the electronic structure of Fe–N4 active sites. Benefiting from the S-doped carbon structure, the Fe SAs@S/N–C catalyst exhibits outstanding ORR performance (E1/2 = 0.84 V) under alkaline conditions, possesses superior durability after 10 K cyclic voltammetry cycles and methanol resistance, outperforming the commercial 20 wt% Pt/C catalyst. Moreover, the Fe SAs@S/N–C catalyst can be easily synthesized at the gram scale, meeting the requirement of practical applications. The liquid-state ZABs assembled with the Fe SAs@S/N–C catalyst as the air cathode demonstrate a large peak power density of 156 mW cm−2 and long-cycling over 300 h. Moreover, the as-assembled flexible all-solid-state ZABs exhibit excellent cycle stability under various bending conditions, demonstrating the promising potential of substituting Pt-based catalysts in practical applications.
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高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Xinlun Song,Juan Zhang,Xiaogeng Feng,Yan’ou Qi,Junshuo Cui,Ying Xiong
Optimizing active sites and enhancing mass transfer capability are of paramount importance for the improvement of electrocatalyst activity. On this basis, CoFe 2 O 4 /CoFe nanoparticles (NPs) loaded N-doped carbon (NC) that featured with interconnected three-dimensional (3D) ordered porous hierarchies (3DOM FeCo/NC) are prepared, and its electrocatalytic activity is studied. Due to the open structure of 3D ordered macro-pores that greatly improves the mass transfer capacity of the catalytic process and enhances the utilization of active sites inside the catalyst, as well as the uniform distribution of Fe and Co bimetallic sites on the porous skeleton, 3DOM FeCo/NC exhibits superior bi-functional catalytic activities for both hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR). The overpotential of HER is lower than that of commercial Pt/C when performed at high current density (>235 mA cm −2 ) in 1.0 M KOH, and the half-wave potential (0.896 V) of ORR in 0.1 M KOH is also superior to that of 20% commercial Pt/C and most other similar catalysts. The effective utilization and synergistic effect of CoFe 2 O 4 and CoFe hetero-metallic sites remarkably enhance the electrocatalytic activity. Furthermore, 3DOM FeCo/NC is assembled as an air electrode in Zn-air battery, and exhibits satisfactory maximum power density, open-circuit voltage, and charge/discharge stability over benchmark Pt/C + IrO 2 . This work contributes new insights into the design of transition-metal-based multifunctional catalysts, and has great potential for energy conversion and storage.
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高影响因子
CHEMISTRY OF MATERIALS
·
2016
·
IF 9.407
Chunwei Dong,Dong Yao,Jianyou Feng,Tingting Huang,Xiyu Hu,Zhennan Wu,Yi Liu,Bai Yang,Hao Zhang
Hollow nanostructures have shown charming properties beyond their solid counterparts, but the synthesis of multinary chalcogenide semiconductors with hollow nanostructures remains challenging, because of their complex components. In this work, we demonstrate a facile one-pot method to synthesize Cu2GeS3 hollow nanoparticles (NPs) based on Kirkendall effect by using dissolved GeO2 as the Ge source. A theory model according to the diffusion kinetic and reaction kinetic is established to investigate the growth mechanism of Cu2GeS3 hollow NPs. By using Cu2GeS3 hollow NPs as the template, quaternary Cu2MGeS4 (M = Zn, Ni, Co, Fe and Mn) hollow NPs are further produced, which are more difficult to prepare, because of their excessive ion species. Furthermore, Cu2GeS3 hollow NP-based gas sensors are prepared, which exhibit outstanding sensitivity for the detection of ethanol gas, because of their large surface-to-volume ratio and small grain size.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 51
·45475-45481
·
IF 3.289
Yi Yang,Kang Shen,Jun-zhong Lin,Yong Zhou,Qiao-yun Liu,Cheng Hang,Hani Nasser Abdelhamid,Zhen-qin Zhang,Hong Chen
A novel zinc-based luminescent metal–organic framework (Zn-MOF) has been successfully constructed based on a designed flexible and electron-rich N-involved linker (HL = 4-(bis(4-(pyridin-4-yl)phenyl)amino)benzoic acid). The framework of this Zn-MOF exhibits a 2-fold interpenetrated network which is composed of (3,3)-c sheets. The Zn-MOF has a strong solid state emission at 512 nm. The luminescence signal of the Zn-MOF can be quenched efficiently by trace amounts of electron-deficient nitroaromatics, especially 2,4,6-trinitrophenol (TNP). The quenching constant (Ksv) for TNP is 2.11 × 104 M−1, indicating that this framework can be employed as an excellent chemical sensor for identifying and quantifying TNP. This work highlights a strategy for designing a N-involved π-electron-rich enhanced ligand with nucleophilic properties for MOF-based materials as sensors. It also paves the way toward exploring other more efficient MOF materials as sensors for determining electron-deficient nitroaromatics.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2017
·
IF 3.386
Mei Li,Jianling Xia,Haiyang Ding,Chengxiang Ding,Mei Wang,Shouhai Li
An adduct of myrcene and maleic anhydride (AMMA) was synthesized using a Diels-Alder reaction. The adduct was transformed into the corresponding sodium , calcium salt and zinc salts (Na-AMMA, Ca-AMMA, and Zn-AMMA) using a metathesis reaction . The chemical structures of AMMA, Na-AMMA, Ca-AMMA, and Zn-AMMA were confirmed with Fourier transform infrared spectroscopy (FTIR), Inductively coupled plasma-atomic emission spectrometry (ICP-AES), 1 H and 13 C nuclear magnetic resonance ( 1 H NMR and 13 C NMR), and X-Ray Diffraction (XRD). Mixed Ca/Na/Zn salts from AMMA provided thermal stabilization for poly (vinyl chloride) (PVC). The thermal and mechanical properties of the PVC samples were investigated using discoloration and Congo red tests, scanning electron microscopy analysis (SEM), thermal gravity analysis (TGA), TGA–FTIR analysis, thermal gravity-mass spectrometer analysis (TGA-MS), and dynamic mechanical analysis (DMA). Optimal design of the Ca/Na/Zn-AMMA formulation was studied. The application of Ca/Na/Zn-AMMA in an optimized formulation for a biobased, primary thermal stabilizer for PVC could significantly improve PVC thermal stability. The optimized Ca/Na/Zn-AMMA formulation had higher thermal stability, higher storage modulus , and lower glass transition temperatures than PVC blends without any thermal stabilizers and using commercial CaSt 2 /ZnSt 2 . The weights of the Ca/Na/Zn-AMMA samples were 33.3–75.0% that of CaSt 2 /ZnSt 2 , but provided higher thermal stability. Myrcene-derived Ca/Na/Zn-AMMA was shown to have strong potential as a primary PVC thermal stabilizer.
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高影响因子
危险品化学品经营许可证（带存储）