Nano Energy
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2017
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IF 12.343
Long Kuai,Erjie Kan,Wei Cao,Marko Huttula,Sami Ollikkala,Taru Ahopelto,Ari-Pekka Honkanen,Simo Huotari,Wenhai Wang,Baoyou Geng
Oxygen reduction reaction (ORR) is the key reaction in various electrochemical energy devices. This work reports an inexpensive mesoporous LaMnO 3+δ perovskite for ORR with remarkable activity, synthesized by a facile aerosol-spray assisted approach. The mesoporous LaMnO 3+δ material shows a factor of 3.1 higher activity (at 0.9 V vs. RHE) than LaMnO 3 obtained from co-precipitation method (LMO-CP). Based on results of x-ray absorption near-edge spectroscopy (XANES), x-ray photoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) analysis, we conclude that the chemical state of surface Mn and the high surface area are the sources to the notably enhanced activity. The study of Zn-air batteries device further confirmed a Pt/C comparable performance in the practical devices with the novel mesoporous LaMnO 3+δ catalyst, where the power density at 200 mA/cm 2 is only 2.1% lower than in the battery with same-loaded Pt/C catalyst. Therefore, the high mass activity and low-cost of Mn/La may make LaMnO 3+δ further approach to the application of electrochemical devices .
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ELECTROCHIMICA ACTA
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2016
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IF 4.803
Pingwei Cai,Suqin Ci,Erhuan Zhang,Ping Shao,Changsheng Cao,Zhenhai Wen
Highly electrocatalytic activity and strong stability towards both oxygen evolution (OER) and oxygen reduction reaction (ORR) have been regarded as the critical factors in widespread application for the renewable energy technologies. It still remains a huge challenge for developing bifunctional catalysts with low cost, efficiently electrocatalytic activity and strong stability. In this paper, FeCo alloy nanoparticles embedded in nitrogen-doped carbon are synthesized through a simple thermal decomposition of Co-Fe Prussian Blue Analogue (Co-Fe PBA) in Ar atmosphere, during which the organic ligand of CN − in Co-Fe PBA provides both carbon and nitrogen sources for forming nitrogen-doped carbon and FeCo alloy nanoparticles were formed, and thus producing a core-shell structure (FeCo@NC). According to a set of electrochemical tests, the obtained FeCo@NC can function as a Janus to drive OER and ORR with desirable activities and stabilities in alkaline media. Specifically, the FeCo@NC presents an onset-potential of 1.45 V, a potential of 1.49 V at 10 mA cm −2 , a Tafel slope of 62 mV dec −1 as OER catalyst, and an onset potential of 0.94 V, a half-wave potential of 0.8 V as ORR catalyst. The performance is comparable to those of precious metal based electrocatalysts , making it possible for potential application in the renewable energy devices, especially Zn-air battery.
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NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 13
·5436-5444
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IF 3.269
Hao Li,Sirong Yu
A superhydrophobic Cu–Zn coating was fabricated on a steel surface by facile one-step electrodeposition, without being chemically modified by a low surface energy material. It was noted that three-level hierarchical structures, just like the surface morphology of a lotus leaf, were formed on the Cu–Zn coating surface via scanning electron microscopy (SEM) images. The water contact angle of the prepared Cu–Zn coating surface was 153.40°, and the sliding angle was less than 10°. From the aspect of chemical composition, it was characterized to confirm that the oxidation of Cu and Zn, and oxygen adsorption were the reasons for the superhydrophobicity. In terms of the surface morphology, based on the classical Wenzel and Cassie models, an idealized three-dimensional (3D) model was fabricated to demonstrate the rationality of the superhydrophobicity without chemical modification. Moreover, this three-level hierarchical Cu–Zn coating had stable superhydrophobicity, excellent self-cleaning properties, and stability.
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MATERIALS LETTERS
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2015
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IF 2.489
Xiwei Liu,Jianke Sun,Yinghong Yang,Feiyu Zhou,Zhongjie Pu,Li Li,Yufeng Zheng
The microstructure, mechanical properties , in vitro degradation behavior and hemocompatibility of novel Zn–1Mg–0.1Sr and Zn–1Mg–0.5Sr (wt%) ternary alloys were evaluated with pure Zn as control. The results indicated that Zn–Mg–Sr alloys exhibited much higher yield strength (YS), ultimate tensile strength (UTS), hardness and corrosion rate than those of pure Zn. But their elongation and hemolysis rates were reduced. Furthermore, the hot-rolled Zn–1Mg–0.1Sr alloy presented the superior mechanics performance (196.84±13.20 MPa, 300.08±6.09 MPa, 22.49±2.52%, 104.31±10.18 for YS, UTS, Elongation and hardness, respectively), appropriate corrosion rate (0.15±0.05 mm/year) and excellent hemocompatibility (hematolysis rate of 1.10±0.2% and no signs of thrombogenicity), showing a preferable candidate as the biodegradable implant material .
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Bin Zhou,Feiyu Luo,Yi Liu,Zhengzhong Shao
Zn metal anode is confronted with notorious Zn dendrite growth caused by inhomogeneous Zn2+ deposition, rampant dendrite growth, and serious interface side reactions, which significantly hinder their large-scale implication. Interface modification engineering is a powerful strategy to improve the Zn metal anode by regulating Zn2+ deposition behavior, suppressing dendrite formation, and protecting the anode from electrolyte corrosion. Herein, we have designed a high-strength and superior-electrolyte-wettability composite gel protective layer based on silk fibroin (SF) and ionic liquids (ILs) on the Zn anode surface by a straightforward spin-coating strategy. The Zn ion transport kinetics and mechanical properties were further improved by following the incubation process to construct a more well-ordered β-sheet structure. Consequently, the incubated composite gel coating serves as a command station, guiding the Zn ion’s preferential growth along the (002) plane, resulting in a smooth and uniform deposition morphology. Driven by these improvements, the zinc anode modified with this composite gel exhibits a remarkably long-term cycling lifespan up to 2200 h at 2 mA cm–2, while also displaying superior rate capability. This study represents a landmark achievement in the realm of electrochemical science, delineating a clear pathway toward the realization of a highly reversible and enduring Zn anode.
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PubMed
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Qiyu Li,Lei Zhao,Zhaozhao Zhu,Pei Xiong,Jiayu Zuo,Jun Song Chen,Rong Li,Rui Wu
Zinc-air batteries (ZABs) have garnered significant interest due to their environmental friendliness, low cost, and high energy density. However, their practical application is significantly hindered by high overpotential and sluggish reaction kinetics. Here, we propose a hollow nitrogen-doped carbon supported atomically dispersed Fe and Mn sites (FeMn-HNC) through a facile NaCl-assisted pyrolysis strategy. The synthesized FeMn-HNC catalyst possesses a hollow porous structure, resulting in exceptional oxygen reduction reaction (ORR) catalytic activity, remarkable durable stability, and good tolerance to methanol. Furthermore, integrating this catalyst into ZABs demonstrates significant performance advantages, achieving a maximum power density of 223.1 mW cm −2 and a high specific capacity of 804.3 mAh g −1 . This study offers a promising approach for boosting the power density and specific capacity of nitrogen-doped carbon catalysts in ZABs.
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ACS Nano
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2024
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IF 15.8
Kuo Wang,Yajie Luo,Hongtu Zhan,Xiao-Xia Liu,Xiaoqi Sun
Zn metal anodes experience dendritic growth and hydrogen evolution reactions (HER) in aqueous batteries. Herein, we propose an interface regulation strategy with a trace (1.4 × 10–4 mol kg–1) all-in-one epicatechin (EC) electrolyte additive to solve the above issues and reveal the roles of individual functional groups. By the disassembly of EC into simple molecules combined with entire molecule investigations, we show that phenol and ether sites preferentially anchor on the Zn surface, while the hydroxyl group pointing outward enters Zn2+ solvation shells at the interface. It modifies the following desolvation path, which not only enables uniform deposition with the thermodynamically favored plate morphology but also inhibits HER. With these synergistic effects of trace EC additive, the lifespan of symmetric cells extends to 8.5 times that of the baseline ZnSO4 electrolyte. The capacity retention of Zn//MnO2 full batteries with N/P = 3 also increases from 59.1 to 85.6% after 500 cycles.
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Journal of Materials Chemistry B
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2025
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IF 5.7
Ge Pan,Jinyao Zheng,Zongjia Li,Qian Duan,Miaomiao Zhang,Dapeng Wang
Oral biofilm is associated with various oral diseases causing pain and discomfort, and poses a severe threat to general health. Conventional surgical debridement and antibacterial therapy often yield unsatisfactory outcomes because they either fail to fully and painlessly eliminate biofilm or increase the risk of bacterial resistance. In this study, we synthesized polydopamine-embellished Zn-MOFs (ZIF-8@PDA NPs), which can degrade under mildly acidic conditions to release Zn2+. These nanoparticles also convert near-infrared light energy into heat, thereby enabling synergistic photothermal and antibacterial metal ion therapy for oral biofilm eradication. Our findings reveal that therapy with polydopamine-embellished Zn-MOFs, when exposed to near-infrared radiation, demonstrates exceptional antibacterial efficacy and is highly effective in eradicating oral biofilms, both in vitro and ex vivo. Furthermore, we used an in vivo rodent tooth biofilm model to demonstrate the suppression of dental caries. This work presents a promising solution for treating diseases linked to oral biofilm infections, as well as preventing and suppressing dental caries.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Bo Jing,Xinke Xu,Jingze Wang,Changyan Sun,Wenjun Li,Zhidong Chang
L-lactate is an essential biomarker in clinical diagnostics and food quality assessment. This study introduces a novel ratiometric fluorescence sensor, RhB@Zn-MOF, which was specifically designed for the sensitive and selective detection of L-lactate. Through the strategic incorporation of Rhodamine B (RhB) into Zn-MOF, RhB@Zn-MOF was synthesized, exhibiting dual-emission properties and could effectively distinguish L-lactate in complex biological and food matrices such as milk and sweat based on the competitive absorption mechanism. Notably, the sensor achieves a low detection limit of 0.091 μM and demonstrates excellent stability and reproducibility in varied conditions. Furthermore, the integration of the sensor with smartphone technology enables rapid, real-time analysis, showcasing potential applications in sports medicine, clinical environments, and the food industry.
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Yifan Wang,Tingjuan Wang,Xiaowen Wu,Jiancheng Wang,Endong Chang,Zhaohui Huang,Minghao Fang,Xin Min,Shiming Su
Forward osmosis membrane has shown great potential in the fields of seawater desalination and sewage treatment. However, the concentration polarization phenomenon and membrane fouling in the water treatment process greatly reduce the water treatment performance and restrict its application. To address these challenges, we employed a pre-buried seed-in-situ growth method to facilitate the Zn–Al layered double hydroxide (Zn–Al LDH) growth on the thin nanofiber membrane, and use it as the support layer for the preparation of a Zn–Al LDH modified forward osmosis membrane. Studies have shown that the introduction of Zn–Al LDH significantly improves the water treatment efficiency of the forward osmosis membrane (In Al-DS mode, the water flux increased by 87.5 %, up to 50.50 LMH, with a low specific salt flux of 0.13 g L −1 ). It also exhibits exceptional antibacterial, anti-membrane fouling, and photocatalytic degradation properties. This research presents a novel approach for the development of advanced high-efficiency forward osmosis membranes.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Yiqing Wu,Xiangmei Ma,Bin Wang,Yanan Li,Shengtao Gao
The detrimental effects of ultraviolet (UV) and electromagnetic (EM) radiation on human health and physiological functions are well documented. The development of efficient shielding materials to mitigate these effects is therefore an urgent necessity. In this study, Zn/Ti-LDH@Ce/Fe-MOF@PPy composites were successfully prepared by hydrothermal synthesis and interfacial polymerisation. The properties of the composites were compared and analysed with those of pure Zn/Ti-LDH and Ce/Fe-MOF, and the results show that the prepared materials have excellent comprehensive properties, with a broad EAB of 5.2 GHz and a RL min of −46.2 dB at 14.8 GHz at the thickness of 3 mm, while exhibiting excellent UV shielding capability.The present study offers novel concepts and efficacious methodologies for the engineering of high-performance microwave absorbing and UV shielding materials.
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Journal of Energy Storage
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2024
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IF 8.9
Xin Yu,Dandan Yu,Yanli Li,Huanle Niu,Tiantian Zhang,Wenyan Yang,Dongfei Sun
Aqueous zinc ion batteries (AZIBs) are gaining considerable research attention owing to their high safety and low cost. Although MnO 2 is a promising cathode, the inevitable MnO 2 dissolution and slow kinetics still limit their application in AZIBs. Herein, we propose a Fe 3+ and K + co-doping design of MnO 2 (labeled Fe-KMnO) to improve the structural stability and kinetics. Specifically, the introduction of Fe 3+ and K + can reduce the particle size and enlarge the interlayer spacing of MnO 2 , while the lattice substitution of Fe 3+ can reduce Zn 2+ diffusion barriers inside the cathode by the density functional theory calculations, leading to the good rate stability. Meantime, the TiO 2 coated Zn foil is designed to alleviate corrosion and suppress Zn dendrites, thus reduce the interfacial resistance and improve the dynamics of Zn-MnO 2 batteries. Based on the advantages of Fe-KMnO material and the effective protection of Zn anode, Fe-KMnO electrode shows excellent performance. When it is applied to the cathode material for aqueous zinc ion battery, the reversible specific capacity of 367.4 mAh g −1 is obtained at the current density of 0.1 A g −1 , superior cycle stability (a capacity of 109.5 mAh g −1 at 1 A g −1 after 5000 cycles), making it a promising cathode for high-performance AZIBs.
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