SENSORS AND ACTUATORS A-PHYSICAL
·
2023
·
IF 4.6
Shuyu Wang,Shuaiyang Duan,Tianyu Yang,Zhonghai He,Zhichao Xia,Yuliang Zhao
Self-powered strain sensing, using a combination of nanosheets and hydrogel, shows tremendous potential in the context of wearable electronic applications. However, achieving the desired multifunctionality of conductive nanosheets within the hydrogel material remains a significant challenge. Further research is needed to better understand the underlying physics mechanisms of the ionically conductive polymer battery and the various factors that influence its voltage output. In this study, we introduce a self-powered strain sensor that utilizes a combination of hydrogel, Zn foil, and silver-coated Nylon to create a Zinc-air battery. The hydrogel, composed of PAAm-PVA-GO, exhibits remarkable properties such as high elasticity(∼1000 %), adhesion(∼15kPa), and improved sensitivity to strains(0.58, 2.44). The hydrogel’s strong bonding behavior is due to the abundant hydroxyl groups generated by the redox activity. The strain-induced voltage output, as determined through experimental evaluation, demonstrates excellent repeatability(1000 cycles of 100 %). Additionally, we examine the impact of temperature and usage time on the output voltage. To gain further insight into the sensor’s electrical potential, we develop a simulation model based on the multiphysics framework, which aligns closely with the experimental findings. To demonstrate its practical application, we successfully apply this self-powered strain sensor for monitoring joint bending and throat movement.
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RSC Advances
·
2023
·Vol. 13
·期 50
·34947-34957
·
IF 3.9
Lei Luo,Zhaorui Wen,Guo Hong,Shi Chen
Aqueous zinc ion batteries (AZIBs) are the promising candidate for energy storage where safety and low cost are the major concerns. However, the uneven and random electrodeposition of Zn has become a serious impediment to the deep recharging of AZIBs. Conventional modifications on zinc substrate can promote homogenous zinc deposition initially, but not sustainably. Here, an oxidized polyacrylonitrile (OPAN) membrane with a conjugated planar structure is proposed as a zinc ion battery separator. This separator can continuously regulate the growth of Zn with (002) texture to inhibit dendrites. In addition, the separator has a fast Zn2+ ion transfer, which can spontaneously repel SO42− and relieve side reactions. As a result, the Zn-symmetric batteries show cycle lifetime of more than 1300 hours at 1 mA cm−2 and 1 mA h cm−2, and kept stable for more than 160 hours even at 65% high discharge of depth (DOD). The MnO2//Zn full celled assembled with an OPAN separator had very little decay for 5000 cycles at 2 A g−1. This work provides a new method for realizing the continuous and uniform deposition of Zn metals, which also provides a new route for batteries with metallic anodes.
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Journal of Energy Chemistry
·
2023
·
IF 13.1
Yuxiang Yan,Yuxin Cao,Zhichao Wang,Ka Wang,Hengdong Ren,Shaoqi Zhang,Yi Wang,Jian Chen,Yong Zhou,Lizhe Liu,Jun Dai,Xinglong Wu
Rational design of efficient and robust earth-abundant alkaline hydrogen evolution reaction (HER) catalysts is a key factor for developing energy conversion technologies. Currently, antiperovskite nitride CuNMn 3 has garnered significant interest due to its remarkable properties such as negative/zero thermal expansion and magnetocaloric effects. However, when utilized as hydrogen evolution catalysts, it encounters large challenge resulting from excessively strong/weak interactions with adsorbed H on Mn/Cu active sites, which leads to low HER activity. In this study, we introduce an asymmetric orbital hybridization strategy in Zn-doped Cu 1− x Zn x NMn 3 by leveraging the localization of Zn electronic states to reconfigure the electronic structures of Cu and Mn, thereby reducing the energy barrier for water dissociation and optimizing Cu and Mn active sites for hydrogen adsorption and H 2 production. Electrochemical evaluations reveal that Cu 0.85 Zn 0.15 NMn 3 with x = 0.15 demonstrates exceptional electrocatalytic activity in alkaline electrolytes. A low overpotential of 52 mV at 10 mA cm −2 and outstanding stability over a 150-h test period are achieved, surpassing commercial Pt/C. This research offers a novel strategy for enhancing HER performance by modulating asymmetric hybridization of electron orbitals between multiple metal atoms within a material structure.
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CARBON
·
2021
·
IF 9.594
Wenhui Deng,Guang Li,Tianjing Wu,Li He,Jinyang Wu,Junchang Liu,Haitao Zheng,Xilong Li,Yuqing Yang,MingJun Jing,Ying Wang,Xianyou Wang
The nonprecious electrocatalyst with high electrocatalytic activity and low cost is urgently desired to fulfill the demands of efficient rechargeable Zn-air batteries (ZABs). Herein, the heteroatom functional carbon-based nanocage Zn-NC is prepared through pyrolysis of ZIF-8. In this process, the organic ligands are converted into partially graphitized carbon with simultaneously reduction of Zn 2+ to metal Zn, thus the nitrogen doping porous structure and homogeneous distributed zinc endow the Zn-NC more exposed active surface. Further co-heat treatment of carbonized ZIF-8 precursor with dicyandiamide and glucose results in the formation of Zn, N atomic-level modified carbon material Zn-NC/GD. The dual-shell carbon nanocage structure produces obvious interface properties , which can well bind the escaping metallic zinc to form Zn–N–C bond structure. Benefiting from double carbon modification, interfacial properties, and bonding structure, the Zn-NC/GD performs outstanding half-wave potential (0.86 V) and a lower Tafel slope (97.8 mV dec −1 ). Consequently, as an air electrode, the Zn-NC/GD also exhibits high open circuit voltage (1.531 V), remarkable power density (326.1 mW cm −2 ), and excellent specific capacity (824.7 mAh g zn −1 ). The critical findings demonstrate promising potential to obtain an efficient atomic-level modification of carbon-based electrocatalyst for ZABs.
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Surfaces and Interfaces
·
2021
·
IF 4.837
You Wu,Ru Yan,Yangyang Duan,Juan Qiu,Ting Chen,Houyi Ma
Because traditional chromating and phosphating processes are harmful to the environment and human health, an eco-friendly tannic acid (TA)-based conversion film technology is established by adopting a new self-assembly strategy of TA/metal complexes on iron surfaces in aqueous solutions. In this study, TA and TA/Zn films were conveniently fabricated by anchoring a certain amount of TA molecules on the iron surface through the coordination interaction between phenolic hydroxyls and metal ions . In contrast, the introduction of Zn ions in the film-forming process cannot only complex with more TA molecules to form a thicker conversion film but also accelerate the film-forming process and transform into ZnO, which can further inhibit iron corrosion. This combination leads to the excellent corrosion protection of TA/Zn film-modified iron (the corrosion protection efficiency is up to 92.39%). Moreover, impact tests show that the TA/Zn film can enhance the adhesion between the iron substrate and outer coating.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Zhi Shen,Qiang Zhao,Hai-Quan Xie,Yu-Quan Feng,Shu-Yang Chen,Zhuo Shi
In this study, a multiple binding sites ligand, 5-(4-carboxyphenoxy)nicotinic acid ligand (H 2 cpna), was used to construct metal complexes with Zn 2+ , Cd 2+ , Mn 2+ and Co 2+ by solvothermal reaction, and four new complexes were constructed, namely, [Zn (cpna)•H2O]n (1)，[Cd (cpna) (CH 3 CN)·2H 2 O] n ( 2 ), [Mn (cpna)•2H 2 O] n ( 3 ) and Co(cpna)•2H 2 O] n ( 4 ); All the complexes were characterized by single crystal X-ray diffraction, elemental analysis and infrared analysis in the solid state; Single crystal x-ray diffraction analyses reveal that complexes 1 and 2 have two-dimensional network structures, complexes 3 and 4 have three-dimensional structures. In addition, Luminescence behavior of complex 1 and 2 was investigated and magnetic properties of complex 3 and 4 were studied. The fluorescent test results show that the fluorescence intensity of complex 1 is higher than that of ligand and emission band can be considered as LLCT emission of ligand; The Magnetic results indicate weak ferromagentic interactions in complex 3 and χ m T value rises slowly and then decreases sharply from 300 K to 2 K. However, magnetic results indicate antiferromagentic interactions in complex 4 and χ m T value can be divided into three parts with the change of temperature from 300 K to 2 K.
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Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 23
·13678-13687
·
IF 12.732
Dan Wang,Hao Xu,Peixia Yang,Xiangyu Lu,Jingyuan Ma,Ruopeng Li,Lihui Xiao,Jinqiu Zhang,Maozhong An
Compared to individual metal sites, e.g. Fe–N4 sites, the synergistic effect of dual-metal sites can further adjust the interaction of reactants or intermediates with active sites, which is beneficial for boosting the oxygen reduction reaction (ORR) in Zn–air batteries. However, developing a simple and direct method instead of complicated procedures and post-treatment to realize well-defined dual-metal sites is still a grand challenge. Herein, a facile one-step impregnation-pyrolysis route without any post-treatment is developed to controllably synthesize Fe and Co dual-metal sites embedded in hierarchical N-doped carbon from metal–organic frameworks. X-ray absorption spectra coupled with density functional theory calculations demonstrate that the Fe–N4 and Co–N4 dual sites can synergistically enhance the ORR activity. Impressively, the well-controlled FeCo–N–C catalyst exhibits excellent ORR performance, with half-wave potentials (E1/2) of 0.807 and 0.904 V in 0.1 M HClO4 and 0.1 M KOH, respectively. Benefiting from the highly active dual-metal sites and desired porous structure, FeCo–N–C serving as a cathode catalyst achieves an uplifting peak power density of 196.3 mW cm−2 and a remarkable specific capacity of 728.6 mA h gZn−1 at a discharge current density of 20 mA cm−2 in a practical liquid Zn–air battery. Besides this, such superb battery performance is demonstrated in an all-solid-state Zn–air battery.
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DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 41
·14475-14482
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IF 4.174
Jing Yang,Xianliang Li,Junbiao Wu,Yide Han,Zhuopeng Wang,Xia Zhang,Yan Xu
Multicomponent spinel ferrites are essential to be used in high-performance gas-sensing materials. Herein, multinary (Cu,Zn)Fe2O4 spinel nano-microspheres with tunable internal structures, including solid, core–shell, and yolk–shell, were successfully synthesized by a simple self-templated solvothermal method combined with a subsequent annealing strategy. The internal structures of the (Cu,Zn)Fe2O4 nano-microspheres significantly rely on the heating rates of the precursors, which show promising selective response towards trimethylamine gas. Among them, the as-formed yolk–shell (Cu,Zn)Fe2O4 nano-microspheres exhibited high response to triethylamine with excellent selectivity of STEA/SX = 1.86 at 160 °C, fast response–recovery rate (58 s/136 s), and long-term repeatability and stability of more than one month. The corresponding triethylamine gas-sensing mechanism with the special microstructures is discussed. This work provides new insights into the rational design of interior structure and the modulation of high gas response and selectivity of multinary spinel ferrites in gas-sensing applications.
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Chemistry-An Asian Journal
·
2020
·Vol. 15
·期 21
·3568-3574
·
IF 4.056
Zhaoqin Fu,Shilong Liu,Zequn Mai,Zhenghua Tang,Dong-Dong Qin,Yong Tian,Xiufang Wang
Graphical A facile approach has been developed to prepare a NiFe 2 O 4 /Ni 3 S 4 heterostructure. The NiFe 2 O 4 /Ni 3 S 4 catalyst exhibited superior performance toward oxygen evolution reaction and Zn-air batteries than IrO 2 . The excellent performance is mainly attributed to the structural merits of the two components, the abundant oxygen vacancies in the catalyst, and the boosted synergistic catalytic effects occurring at the heterostructure interface. Developing high-performance catalysts for oxygen evolution reaction (OER) is critical for the widespread applications of clean and sustainable energy through electrochemical devices such as zinc-air batteries and (photo)electrochemical water splitting. Constructing heterostructure and oxygen vacancies have demonstrated great promises to boost the OER performance. Herein, we report a facile strategy to fabricate hetero-structured NiFe 2 O 4 /Ni 3 S 4 nanorods, where NiFe 2 O 4 can be derived from Fe-based metal-organic frameworks (MOFs). The NiFe 2 O 4 /Ni 3 S 4 catalyst exhibited excellent OER performance, evidenced by an overpotential value of 357 mV at the current density of 20 mA cm −2 , and a small Tafel slope of 87.46 mV dec −1 in 1 M KOH, superior to the benchmark IrO 2 catalyst. Moreover, NiFe 2 O 4 /Ni 3 S 4 outperformed with regard to long-term durability for OER than IrO 2 . Such outstanding OER performance is mainly accounted by the interface between NiFe 2 O 4 and Ni 3 S 4 , and the presence of rich oxygen vacancies. When employed as air-cathode in zinc-air batteries, the NiFe 2 O 4 /Ni 3 S 4 decorated battery had a high round-trip efficiency of 62.1% at 10 h, and possessed long-term stability of >50 h. This study may pave the way for fabricating non-noble-metal-based cost-effective, efficient and durable electrocatalysts for OER, zinc-air batteries, and beyond.
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RSC Advances
·
2020
·Vol. 10
·期 71
·43599-43606
·
IF 3.119
Xiaomeng Dou,Wenzhi Li,Chaofeng Zhu,Xiao Jiang,Hou-min Chang,Hasan Jameel
Efficient cleavage of aryl–ether linkages is a key strategy for generating aromatic chemicals and fuels from lignin. Currently, a popular method to depolymerize native/technical lignin employs a combination of Lewis acid and hydrogenation metal. However, a clear mechanistic understanding of the process is lacking. Thus, a more thorough understanding of the mechanism of lignin depolymerization in this system is essential. Herein, we propose a detailed mechanistic study conducted with lignin model compounds (LMC) via a synergistic Co–Zn/Off-Al H-beta catalyst that mirrors the hydrogenolysis process of lignin. The results suggest that the main reaction paths for the phenolic dimers exhibiting α-O-4 and β-O-4 ether linkages are the cleavage of aryl–ether linkages. Particularly, the conversion was readily completed using a Co–Zn/Off-Al H-beta catalyst, but 40% of α-O-4 was converted and β-O-4 did not react in the absence of a catalyst under the same conditions. In addition, it was found that the presence of hydroxyl groups on the side chain, commonly found in native lignin, greatly promotes the cleavage of aryl–ether linkages activated by Zn Lewis acid, which was attributed to the adsorption between Zn and the hydroxyl group. Followed by the cobalt catalyzed hydrogenation reaction, the phenolic dimers are degraded into monomers that maintain aromaticity.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 11
·e5932
·
IF 3.14
Yanming Jia,Junwen Wang,Kan Zhang,Chuanmin Ding
A highly shape-selective and relatively long-lifetime HZSM-5-based catalyst (Zn-2P/HZSM-5) was prepared by chemical modification with both ZnSiF 6 ·6H 2 O and H 3 PO 4 solution. The phosphoric acid modification could effectively modulate the Brønsted acid strength of the HZSM-5 catalyst, which promotes the oligomerization, alkylation, cyclization, and hydrogen transfer reactions. The introduction of Zn-Lewis acid sites significantly improved the dehydroaromatization of higher olefins. All of these were very beneficial for the generation of BTX (i.e. b enzene, t oluene, and x ylene) hydrocarbons in aromatization of methanol. The coke amount and the average rate of coke formation decreased over the Zn-2P/HZSM-5 catalysts, which may largely be ascribed to its lower strong acid sites and lower outer surface acidity. The catalytic performance of methanol aromatization showed that the Zn-2P/HZSM-5 catalyst exhibited the highest BTX selectivity of about 46.76% and the longest catalytic lifetime of about 498 h at T = 400 °C, P = 0.1 MPa, and weight hourly space velocity = 0.7 h −1 .
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ACS Biomaterials Science & Engineering
·
2020
·
IF 4.152
Yijue Wang,Liqing Zou,Zhe Qiang,Jianhai Jiang,Zhengfei Zhu,Jie Ren
Radiotherapy (RT) is a major treatment method for non-small-cell lung cancer (NSCLC), and development of new treatment modality is now critical to amplify the negative effects of RT on tumors. In this study, we demonstrated a nanoparticle-loaded block copolymer micellar system for cancer hyperthermia treatment (HT) that can be used for synergistic therapy under alternating magnetic field (AMF) and radiation field. Block copolymer micelles (polyethylene glycol-block-polycaprolactone, or PEG-PCL) containing hyaluronic acid (HA) and Mn–Zn ferrite magnetic nanoparticles (MZF) were fabricated via a two-step preparation. HA-modified Mn–Zn ferrite magnetic nanoparticles (MZF-HA) can be enriched in CD44 highly expressing tumor cells, such as A549 (human lung adenocarcinoma cell line), through an active targeting mechanism via receptor–ligand binding of HA and CD44 (HA receptor). MZF can generate thermal energy under an AMF, leading to a local temperature increase to approximately 43 °C at tumor sites for mild HT, and the increased tumor oxygenation can enhance the therapeutic effect of RT. In vitro experiments show that MZF-HA is able to achieve excellent specific targeting performance toward A549 cells with excellent biocompatibility as well as enhanced therapy performance under HT and RT in vitro by apoptosis flow cytometry. In the A549 subcutaneous tumor xenografts model, MRI confirms the enrichment of MZF-HA in tumor, and hypoxia immunohistochemistry analysis (IHC) proved the increased tumor oxygenation after HT. Furthermore, the tumor volume decreases to 49.6% through the combination of HT and RT in comparison with the 58.8% increase of the untreated group. These results suggest that the application of MZF-HA is able to increase the therapeutic effect of RT on A549 and can be used for further clinical NSCLC treatment evaluation.
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