APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Weiguang Fang,Peng Dai,Haibo Hu,Tongtong Jiang,Huaze Dong,Mingzai Wu
Simultaneous acquisition of satisfactory bifunctional activities toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) for single transition metal sulfides is challenging, which greatly restrict their applications as cathode catalysts in the rechargeable Zn-air batteries (ZABs). Herein, Fe 0.96 S/Co 8 FeS 8 nanoparticles co-embedded in 3D porous N, S codoped carbon (Fe 1 Co 1 S x @NSPC) were fabricated with regulated ratio of iron to cobalt. Compared with single iron sulfide catalyst (Fe 0.96 S@NSPC), the obtained Fe 1 Co 1 S x @NSPC exhibits enhanced activities in both ORR and OER , whose half-wave potential and overpotential (at 10 mA cm −2 ) are 0.82 V, 0.39 V. The improved electrocatalytic activities are believed to be from the synergistic effects between the binary sulfides and the N, S co-doping and the 3D porous structures. As expected, the home-made aqueous ZAB based on Fe 1 Co 1 S x @NSPC exhibits a high peak power density (159 mW cm −2 ), large specific capacity (807 mAh g −1 ) and a long-term charge/discharge cycling stability over 378 cycles at about 852 mV. Moreover, the self-made all-solid-state button ZAB based on Fe 1 Co 1 S x @NSPC shows a high peak power density (71 mW cm −2 ) and a well maintained cycle life at about 841 mV over 100 charge/discharge cycles.
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APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Junjie Pan,Wei Xia,Xin Sun,Tao Wang,Jingjing Li,Lei Sheng,Jianping He
Two-dimensional (2D) carbon matrix nanocomposites are promising for efficient microwave absorption on account of the large specific surface area, the small size effect of nanoparticles and the multiple attenuation mechanisms to electromagnetic waves. Herein, we prepared innovative two-dimensional leaf-like bimetallic (Co, Zn) doped porous carbon nanocomposites (BPCNs) via a simple aqueous-phase self-assembly process and subsequent heat treatment. An in-depth study of the relative metal content on the leaf-like morphology, porous structure and microwave absorption properties has been carried out in detail. The research results show that the BPCNs possess large surface areas and abundant mesoporous, and metallic nanoparticles can be well dispersed in the carbon skeleton after high-temperature calcination. Moreover, the BPCNs exhibited excellent microwave absorption properties with the maximum effective absorption bandwidth (EAB) of 5.7 GHz at the thickness of 2.5 mm when Co relative content increased to 40% (BPCN-0.4), and the minimum reflection loss ( RL ) can reach to −45.2 dB. The broad EAB and strong RL value can be attributed to the small size effect of Co and Zn nanoparticles, the improved interfacial polarization and the optimized impedance matching. Considering that, the 2D leaf-like BPCNs can be an innovative candidate as lightweight and efficient microwave absorber.
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Materials Today Bio
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2023
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IF 8.2
Xiang Jin,Dongxu Xie,Zhenbao Zhang,Aobo Liu,Menglin Wang,Jiabao Dai,Xuan Wang,Huanze Deng,Yijie Liang,Yantao Zhao,Peng Wen,Yanfeng Li
Additively manufactured biodegradable zinc (Zn) scaffolds have great potential to repair infected bone defects due to their osteogenic and antibacterial properties. However, the enhancement of antibacterial properties depends on a high concentration of dissolved Zn 2+ , which in return deteriorates osteogenic activity. In this study, a vancomycin (Van)-loaded polydopamine (PDA) coating was prepared on pure Zn porous scaffolds to solve the above dilemma. Compared with pure Zn scaffolds according to comprehensive in vitro tests, the PDA coating resulted in a slow degradation and inhibited the excessive release of Zn 2+ at the early stage, thus improving cytocompatibility and osteogenic activity. Meanwhile, the addition of Van drug substantially suppressed the attachment and proliferation of S. aureus and E. coli bacterial. Furthermore, in vivo implantation confirmed the simultaneously improved osteogenic and antibacterial functions by using the pure Zn scaffolds with Van-loaded PDA coating. Therefore, it is promising to employ biodegradable Zn porous scaffolds with the proposed drug-loaded coating for the treatment of infected bone defects.
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APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Gengzhe Shen,Jing Kong,Yuqing Fei,Lin Xu,Liuyan Zhang,Xiaohua Jie,De Ning,Zhengjian Chen
In this work, layered double hydroxide (LDH) and reduced graphene oxide (rGO) were incorporated into Zn/Ni matrix coating by cold-spraying on the surface of Mg alloys. Inside the resulting GLG@Zn/Ni coating, LDH/rGO are homogeneously dispersed and inner-connected to a protective network. Compared with other coatings without LDH or rGO nanosheets, the GLG@Zn/Ni coating shows the best corrosion resistance, with a high self-corrosion potential at − 1.174 V (vs. − 1.471 V for Mg), a decent self-corrosion current density of 344.7 μA·cm −2 (vs. 878.3 μA·cm −2 for Mg), and the longest available protection (>720 h) against corrosion. Electrochemical and morphological characterizations reveal a synergistic effect of the coating compositions in enhancing corrosion resistance. In detail, the LDH/rGO network inside the coating restricts the penetration of the corrosive medium, particularly for LDH, which has the capacity to capture corrosive Cl − ions. Meanwhile, Ni promotes the conversion of Zn into passivation layers, which then spread to fill the corrosion pores and interphase cracks. This transformation ultimately leads the GLG@Zn/Ni coating to become a unified whole, providing excellent corrosion resistance.
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Materials Advances
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2023
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IF 5
Xamxikamar Mamat,Zehong Gao,Longyi Chen
Over use or long term exposure of acetaminophen (APAP) could cause severe damage to human health. Currently APAP related events is still a global burden. Therefore, secure management of APAP is important for avoiding possible APAP induced incidents. Rapid sensing of APAP in human body fluids can help in better moniotoring of the health condition and provide information for necessary medical aid. Electrochemical sensor utilizing functional nanomaterials and nanostructures have been proved to be a facile approach for sensing APAP in human body fluids. Among various fucntional nanmaterials, the transition element doped Fe3O4 nanoparticle decorated carbon materials have found extensive applications in catalysis, energy and environmental etc. areas. In order to explore the versatility of Zn doped Fe3O4 nanoparticle incorporated with biomass carbon electrocatalyst in electrochemical sensing area, we prepared the N, S and P doped biomass carbon material (NSP-BC) from the biomass of Elaeagnus Angustifolia gum through pyrolysis approach. Then, facile one-pot polyol solvothermal synthesis method was adpoted for deposition of Zn doped Fe3O4 nanoparticle onto the NSP-BC. Among the synthesized electrocatalysts, the Zn/Fe ratio of 0.132 electrocatalyst was found to show the highest Ipa response current towards APAP molecule. The electrocatalysts were systematically characterized by scanning electron microscope, energy-dispersive X-ray spectroscopy, element mapping, X-ray photoelectron spectroscopy, X-ray powder diffractometer, Raman spectroscopy, inductively coupled plasma-optical emission spectroscopy and electrochemical analysis. The electrocatalyst modified glassy carbon electrode sensor achieved a wide linear sensing range of APAP from 2.5 to 500 μM covering urinary physiological APAP concentration range with a limit of detection of 63.9 nM and a sensitivity of 0.64 μA μM-1 cm-2. The electrocatalyst modified GCE sensor also exhibited satisfactory recovery rates of APAP in urine samples. This facile synthesized Zn-doped Fe3O4 nanoparticle @ NSP-BC electrocatalyst has potential application in clinical diagnostics and pharmaceutical analysis.
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FUEL
·
2023
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IF 7.4
Weiwen Wang,Mengqi Xiang,Yaqian Fu,Wenze Wang,Jihai Duan
The sluggish energy of photocatalytic CO 2 reduction and the low methanol yields got are straightforwardly connected with the applied photocatalyst and reactor design, restricting the broad utilization of this technology. In light of this, the aim of this work is to innovate a new application of this Cu-Zn/Ni foam (Cu-Zn/NF) with a rod-like structure, which combines a intact foam-based photocatalyst with a microfluidic flow channel. This design ensures a larger specific surface area, besides a uniform phase distribution and efficient CO 2 reduction. A novel foam-based monolithic photomicroreactor was evaluated by measuring methanol concentration and yield. Under the conditions of 25 mL·min −1 , 0.5 M NaOH, 5 mm thickness of Ni foam, and 350 W xenon lamp irradiation conditions were applied, the methanol yield could reach 15.88 μmol·g −1 ·h −1 . This outcome is superior to the announced values in most CO 2 photoreactors. This work guides the optimization of photomicroreactors, besides provides new ideas for the use of monolithic microreactors for CO 2 reduction.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Yeyin Zhang,Ruting Huang,Yong Fang,Jiacheng Wang,Zijie Yuan,Xinwei Chen,Wenjie Zhu,Yuan Cai,Xianyang Shi
This study developed metal–organic frameworks (MOFs) with enhanced properties for CO 2 conversion by doping second- transition metal ions (Ti, Mn, Zn, and Cu) into Fe–MOF, which resulted in Fe-M−MOF (M = Ti, Mn, Zn, or Cu). The selection of different metal species in the metal cluster nodes of the MOFs significantly impacted the CO 2 conversion efficiency. Among the different combinations, the Fe–Cu bimetallic cluster node was identified as the most optimal node. In addition, we investigated various variables and preparation conditions for determining the optimal synthesis conditions for Fe–Cu-MOFs. We observed that a synthesis temperature, time, and pH of 130 °C, 15 h, and 3.2, respectively, yielded the best results. The 13 CO 2 isotope labeling method confirmed that the carbon source of CO and CH 4 were derived from CO 2 . Under simulated visible-light irradiation (λ ≥ 420 nm), Fe–Cu-T130 exhibited the highest photocatalytic activity, with a CH 4 generation rate of up to 444.2 μmol g −1 h −1 . This high activity was attributed to several factors. First, the presence of Fe 2+ , Fe 3+ , and Cu 2+ on the surface of Fe–Cu-T130 resulted in photogenerated electrons and holes under visible-light excitation. Fe 2+ accepted electrons to reduce CO 2 , whereas Fe 3+ and Cu 2+ oxidized H 2 O through holes. Second, the polycrystalline structure of Fe–Cu-T130 with abundant surface oxygen vacancies enhanced the chemical reactivity. Finally, the low conduction band position and narrower bandgap of Fe–Cu-T130 facilitated the excitation of electrons into the conduction band, thereby promoting the CO 2 reduction reaction. This study successfully demonstrated the enhanced photocatalytic activity of Fe–Cu-T130 for CO 2 conversion under visible light. The findings provide insight into the development of MOFs with improved properties for the sustainable and efficient utilization of CO 2 .
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Shi-Ming Li,Hong-Chan Jiang,Qing-Ling Ni,Liu-Cheng Gui,Xiu-Jian Wang
Ethane (C 2 H 6 ) and ethylene (C 2 H 4 ) have similar physical and chemical properties, which are critical and difficult for the separation of C 2 H 6 /C 2 H 4 mixtures in the petrochemical process. Traditional C 2 H 4 -selective adsorbents can separate the C 2 H 6 /C 2 H 4 mixtures, but need further desorption treatment to obtain pure C 2 H 4 production. On the contrary, high-pure C 2 H 4 can be prepared in one step by C 2 H 6 -selective porous material. Herein, we present a caged metal-organic framework ( GNU-2 ) based on Zn (II) clusters, which has advantageous adsorption sites and cavity pockets for the reverse capture of C 2 H 6 from C 2 H 6 /C 2 H 4 mixtures. At 298 K and 1 bar, high C 2 H 6 uptake (5.10 mmol g −1 ) and C 2 H 6 /C 2 H 4 selectivity (1.849) were attained based on the activated GNU-2 ( GNU-2a ), exceeding a number of top C 2 H 6 -selective adsorbents. Grand canonical Monte Carlo (GCMC) simulations exhibit that the appropriate chemical environment of nonpolar cage in GNU-2a allows it to continuously maintain closer van der Waals contacts between C 2 H 6 molecule, saturated Zn cluster and nonpolar pore surface through multiple C H···O hydrogen interactions and C H···π hydrogen interactions. Moreover, dynamic breakthrough studies also show that GNU-2a displays the actual separation performances of C 2 H 6 .
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Science Bulletin
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2023
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IF 18.9
Canhui Zhang,Xingkun Wang,Zhentao Ma,Hanxu Yao,Hengjun Liu,Cheng Li,Jian Zhou,Ren Xu,Xusheng Zheng,Huanlei Wang,Qiang Li,Meng Gu,Heqing Jiang,Minghua Huang
Breakthrough in developing cost-effective Fe-based catalysts with superior oxygen reduction reaction (ORR) activities and ultra-long-term stability for application in Zn-air batteries (ZABs) remain a priority but still full of challenges. Herein, the neighboring NiN 4 single-metal-atom and Fe 2 N 5 dual-metal-atoms on the N-doped hollow carbon sphere (Fe/Ni-NHCS) were deliberately constructed as the efficient and robust ORR catalyst for ZABs . Both theory calculations and magnetic measurements demonstrate that the introduction of NiN 4 provides a significant role on optimizing the electron spin state of Fe 2 N 5 sites and reducing the energy barrier for the adsorption and conversion of the oxygen-containing intermediates, enabling the Fe/Ni-NHCS with excellent ORR performance and ultralow byproduct HO 2 − yield (0.5%). Impressively, the ZABs driven by Fe/Ni-NHCS exhibit unprecedented long-term rechargeable stability over 1200 h. This work paves a new venue to manipulate the spin state of active sites for simultaneously achieving superior catalytic activities and ultra-long-term stability in energy conversion technologies.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2023
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IF 3.8
Minghui Chen,Chen Wang,Fei Chen,Hongjie Li,Yunpeng Wang,Haitao Ma
A highly sensitive and precise electrochemical biosensor for glucose detection was developed by coupling synergetic catalysis of Cu-Zn-Ni oxide films. To enhance the catalytic performance of alloy, potentials between −0.5 V and 1.5 V are selected for potentiostatic oxidation. Notably, the oxidation process reveals the influence of Cl − in the electrolyte, leading to electrode surface etching, with increasing etching and grain boundary collapse at higher potentials. The electrochemical performance of the electrode was comprehensively evaluated using cyclic voltammetry (CV) and amperometric response in alkaline conditions. The catalytic electrode has an impressive linear response in the concentration range of 0.1 ∼ 1.0 mM glucose, with a sensitivity of 3775.11 μA·mM −1 . Furthermore, the electrode exhibits remarkable stability and anti-interference properties, rendering it suitable for non-enzymatic glucose sensing applications.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Zhong-Hui Zheng,Somboon Chaemchuen,Jun-Fei Gu,Jing Hang,Wei Sang,Ji-Chao Wang,Ye Yuan,Cheng Chen
The catalytic alcohol dehydrogenation to carboxylic acids has been demonstrated as an atom-economic and environmental-friendly synthetic method. However, the reported catalysts either require relatively complicated synthesis or exhibit high activity only in the presence of a solvent. Therefore, it is still in high demand to obtain catalysts that feature facile synthesis and perform well even without any solvent. Herein, a series of nanostructured bimetallic Zn/Co species embedded in N-doped hierarchical porous carbon were fabricated in a facile and green manner. More significantly, the best-performing material (Zn/Co@NC-800) was identified as the first heterogeneous catalyst to enable this transformation under solvent-free conditions. Moreover, the as-prepared composites were comprehensively investigated to determine their structural and morphological properties, which rationalized the superiority of Zn/Co@NC-800 over the other synthesized materials. Further studies signified that Co sites (both Co 0 and Co 2+ ) and N species (mainly pyridinic N) were probably involved in this process, functioning as the Lewis acid site and basic site, respectively. Hopefully, this study could provide a simple and sustainable method for carboxylic acid synthesis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Jia'ni Gong,Pengfei Bai,Yifu Zhang,Qiushi Wang,Jingjing Sun,Yanyan Liu,Hanmei Jiang,Ziyi Feng,Tao Hu,Changgong Meng
Molybdenum trioxide (MoO 3 ) has been widely studied in the energy storage field due to its various phase states and unique structural advantages. Among them, lamellar α -phase MoO 3 ( α -MoO 3 ) and tunnel-like h -phase MoO 3 ( h- MoO 3 ) have attracted much attention. In this study, we demonstrate that vanadate ion (VO 3 - ) can transform α -MoO 3 (a thermodynamically stable phase) to h -MoO 3 (a metastable phase) by altering the connection of [MoO 6 ] octahedra configurations. h -MoO 3 with VO 3 - inserted (referred to as h -MoO 3 -V) as the cathode material for aqueous zinc ion batteries (AZIBs) exhibits excellent Zn 2+ storage performances. The improvement in electrochemical properties is attributed to the open tunneling structure of the h -MoO 3 -V, which offers more active sites for Zn 2+ (de)intercalation and diffusion. As expected, the Zn// h -MoO 3 -V battery delivers specific capacity of 250 mAh·g −1 at 0.1 A·g −1 and rate capability (73% retention from 0.1 to 1 A·g −1 , 80 cycles), well exceeding those of Zn// h -MoO 3 and Zn// α -MoO 3 batteries. This study demonstrates that the tunneling structure of h -MoO 3 can be modulated by VO 3 - to enhance the electrochemical properties for AZIBs. Furthermore, it provides valuable insights for the synthesis, development and future applications of h -MoO 3 .
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