ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yue Yang,Gongcan Liu,Zhou Fang,Mengjiao Liu,Yan Zhao,Xin Lai,Jian Bi,Daojiang Gao
Aqueous zinc-ion batteries (AZIBs) have drawn extensive attention for their high theoretical capacity, low redox potential, and reliable safety. Although layered vanadium oxides are prospective cathodes for AZIBs, they still suffer from fast capacity decay and poor rate capability, resulting from small interlayer spacing and severe structural collapse. Herein, a dual-guest of zinc ions and n-butylamine cointercalation strategy was proposed to solve the above two issues simultaneously. The inserted zinc ions form strong Zn–O bonds between the layers, acting as “pillars” and effectively maintaining the stability of the structure in the repeated insertion/extraction of the Zn2+ process. The preinsertion of n-butylamine preserves a suitable interlayer distance for Zn2+ diffusion, facilitating the reversible insertion/extraction of Zn2+. The density functional theory (DFT) results show that the cointercalated sample (ZBVO) has a more favorable Zn2+ diffusion path with a lower migration barrier. Benefiting from the robust channel synergistically constructed by the two guests, ZBVO displays outstanding electrochemical performances, especially for capacity and long cyclic stability: ZBVO delivers a high specific capacity of 417.1 mAh g–1 at 0.1 A g–1. Moreover, it also shows an enhanced specific capacity of 261.8 mAh g–1 at 5 A g–1 after 1000 cycles and good long cycling stability (ultrahigh capacity retention of 93% over 5000 cycles at 10 A g–1). This work provides guidance for designing high-performance vanadium-based cathodes of AZIBs.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2024
·
IF 2.5
Xiaogang Yu,Md Mostafezur Rahman,Renpeng Yang,Chengwei Wu,Abdelhakim Bouyahya,Wei Zhang
Magnetic induction hyperthermia with self-regulated temperature is an advanced technology capable of automatically regulating hyperthermia temperature through a magnetic phase transition, which has a promising application prospect. This paper investigated the effects of Al 3+ doping on the magnetic properties and Curie temperature of Zn-Mn ferrite. The specific saturation magnetization and Curie temperatures of Zn 0.5 Mn 0.5 Al x Fe 2-x O 4 (0 ≤ x ≤ 0.6) nanoparticles decrease linearly with increment of Al 3+ content. The magnetic heating experiments exhibit that the synthesized nanoparticles can raise the temperature of agar phantom to above 42 °C and self-regulate the temperature below their Curie temperatures, demonstrating their potential for self-regulated temperature hyperthermia. Additionally, in vitro cell experiments confirm the nanoparticles’ good biocompatibility.
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ELECTROCHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.7
Jinru Wen,Hongyan Dan,Chunyang Li,Chunlong Dai,Zifeng Lin
The development of MXenes using Lewis acidic salts for etching (MS-MXenes) in molten salts presents a novel, fluorine-free method attracting considerable interest. However, the behavior of various MS-MXenes and their derivatives in aqueous environments remains largely unexplored. Particularly, vanadium-based MXenes demonstrate intriguing properties in Zn ion aqueous electrolytes. Herein, a fluorine-free V 2 CT x MXene@VO x is synthesized by molten salt etching under an argon atmosphere. The electrochemical properties of V 2 CT x @VO x are tested in various aqueous electrolytes, including Zn(TFSI) 2 , ZnSO 4 , ZnBr 2 , ZnAc 2 , and ZnCl 2 solutions. The V 2 CT x @VO x shows high redox capacities in all these Zn ion electrolytes, with the peak performance observed in 1 M ZnBr 2 , achieving a maximum capacity of 172 mAh g −1 at 1 mV s −1 . This performance rivals that of V 2 CT x MXene prepared through wet-chemical methods. These results underscore the potential of MS-MXenes materials in aqueous energy storage applications.
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Materials Today Chemistry
·
2024
·
IF 6.7
Jun-Fei Gu,Cheng Chen,Somboon Chaemchuen,Wei Sang,Xing-Chuan Li,Ye Yuan,Zongkui Kou,Francis Verpoort
The dehydrogenation of primary alcohols to carboxylic acids is a crucial process in chemical industries such as fibers and plastics. Carboxylic acids, the resulting products, are not only important chemical raw materials but also fundamental pharmaceutical intermediates. Zn-based catalysts have gained attention as a promising option for this transformation owing to their economic cost and abundant reserves. However, stability issues, including structure collapse and morphological changes, have plagued the reported Zn-based catalysts during this transformation. In response to these challenges, this study focused on the design and development of Zn-based catalysts via controlled incorporation of Zn into nitrogen-doped porous carbon to modulate the numbers of defects and Lewis acid-base site pairs. Through extensive screening of various parameters, the best-performing catalyst, namely Zn@NC-800, exhibited high activity and remarkable stability, surpassing all the reported Zn-based catalysts. Moreover, this catalyst demonstrated great recyclability since it could maintain approximately 90 % yields after 9 cycles. Notably, the product formation rate of this catalyst could reach 3833 μmol·g cat . −1 ·h −1 , exceeding that of most reported non-noble metal heterogeneous catalysts. Consequently, this study offers a promising approach for efficiently and stably catalyzing alcohol dehydrogenation reactions using non-noble metals.
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OPTICAL MATERIALS
·
2024
·
IF 3.8
Xiao-shan Miao,Jia-wei Sun,Fu Ma,Hong-jian Zhao,Yan Zhou,Zheng-bing Han,Xu Li
Zn–SnO 2 /BiOBr, a novel heterojunction material for photocatalytic dye degradation, was synthesized successfully using the one-step hydrothermal method. The formation of the heterojunction enhanced the vacancy coupling effect. The photocatalytic experiment results showed that the degradation rate of Rhodamine B (RhB) due to 0.3Zn–SnO 2 /BiOBr (the heterojunction formed when the molar ratio of Zn–SnO 2 to BiOBr was 0.3) within 15 min was 9.27 and 476.9 times that of BiOBr and Zn–SnO 2 , respectively. Additionally, the degradation rate of basic fuchsin (BF) due to 0.3Zn–SnO 2 /BiOBr was 4.2 and 21.9 times that of BiOBr and Zn–SnO 2 , respectively. The significantly improved photocatalytic performance was because many oxygen vacancies in Zn–SnO 2 /BiOBr collaborated with the type-II heterojunction to promote a narrow bandgap value efficiently, increasing the photogenerated electrons (e – ) and hole (h + ), an increased charge separation efficiency under visible light, and favored the photocatalytic degradation of dyes.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Worku Lakew Kebede,Dong-Hau Kuo,Xiaoyun Chen
Environment and energy are presently some of the highest priority topics for mankind that need to be addressed. Organic pollutants are toxic and carcinogenic for human and aquatic life hence their presence in water even in low concentrations can cause serious health problems. Photodegradation of organic pollutants by utilizing oxide-based heterostructure photocatalysts is the promising approach to carry out remediation efficiently ascribed to the advanced optoelectronic and structural superiority of oxide photocatalysts. The Zn(O,S)/Mo(O,S) 2 composites were synthesized via a facile solvothermal method at low temperatures. Several methods were used to characterize the composite morphology, structure, electrical conductivity, chemical composition, and optical characteristics. The heterostructured Zn(O,S)/Mo(O,S) 2 oxysulfide was employed successfully in the photocatalytic degradation of organic pollutants. Among the as-prepared samples, the 30-ZnMoOS composite catalyst was found to have the highest photodegradation performance on various organic dye pollutants. The photocatalytic activity of the as-synthesized Zn(O,S)/Mo(O,S) 2 samples was assessed on the photodegradation of different kinds of organic dyes under visible light irradiation. The photocatalytic degradation efficiency of 30-ZnMoOS composite over 10 ppm neutral red (NR), methylene blue (MB), rhodamine B (Rh B), and methyl orange (MO) was found to be 99.6 %, 99.9 %, 99.5 %, and 98.8 % within 40, 45, 180, and 180 min, respectively, under visible light illumination. In the present photocatalytic system, the superoxide ( . O 2 - ) anions, hydroxyl ( . OH) radicals, and holes (h + ) are proposed to be the direct reactive species causing the photodegradation of organic dyes.
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ACS Nano
·
2024
·
IF 15.8
Yixin Hou,Pengfei Ma,Fei Long,Mingyang Liu,Yifan Zheng,Li Sun,Junjie Shi,Ke Niu,Jun Su,Yanan Ma,Yihua Gao
Air-rechargeable batteries integrating energy harvesting, conversion, and storage provide the most portable and popular approach to self-charging power systems. However, air-rechargeable batteries are currently mostly aqueous Zn-based battery systems in which it has remained a significant challenge to solve the low discharge capacities and poor cycling stability of chemical self-charging due to continuous insertion/extraction of large-size hydrated Zn2+. Herein, efficient Bi2Te3@C cathodes with an active carbon paper substrate are developed. Further ex situ characterization analysis confirms the energy storage mechanism regarding the coexistence of H+/Zn2+ coinsertion and conversion reaction in the aqueous Zn||Bi2Te3@C battery. Benefiting from the fast dynamics process attributed to the unique mechanism, a reliable energy supply is provided even in an extended temperature range from −10 to 45 °C. More importantly, Bi2Te3@C cathodes boost the superior and repeatable air-rechargeability. A discharge capacity of up to 264.20 mA h g–1 at 0.30 A g–1 is manifested after self-charging for 11.00 h. In addition, two quasi-solid-state battery devices are connected in series to continuously power a timer. After the device is discharged and then air self-charged for just a few seconds, an LED is lit.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xinwen Jia,Mengyun Lu,Wenjing Zhang,Wuduo Zhao,Ajuan Yu,Shusheng Zhang
Chiral carbon quantum dots (CQDs) with –SH, –NH 2 functional groups were grafted onto a metal–organic cage (Zn-MOC) with unsaturated metal sites through coordination bond, and then a novel bichiral composite Zn-MOC@CQDs was constructed for the chiral discrimination of LA enantiomers. Zn-MOC@CQDs exhibited a high fluorescence detection sensitivity for L -LA instead of D -LA, and the enantioselectivity coefficient for LA enantiomers was 2.34. Zn-MOC@CQDs exhibited more excellent enantioselectivity than the single components of CQDs and Zn-MOC, and the key reason may be the chiral synergistic effect between the different chiral building blocks.
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DYES AND PIGMENTS
·
2025
·
IF 4.2
Di Wu,Chengpei Du,Lingyan Ma,Rui Xiao,Long Tan,Wenjing Qi
Owing to Zn 2+ -sensitized fluorescent effect, boric acid functionalized zinc-europium binuclear metal-organic frameworks ( Zn-Eu-MOFs ) are synthesized and applied in fluorescent quenching detection of luteolin in Chrysanthemum tea for the first time. Eu 3+ /Zn 2+ and 5-boronobenzene-1,3-dicarboxylic acid (BBDC) are utilized via a fast one-pot microwave process at 120 °C for 1 h. Due to energy transfer efficiency change by “antenna” effect and better effective energy transfer of Zn 2+ than Eu 3+ , Zn 2+ increases fluorescence of Zn-Eu-MOFs nearly 3.5 times. Different ligands and different metal ions are compared to synthesize Zn-Eu-MOFs . Highly specific binding affinity of boric acid towards cis-diol structure in luteolin and chelating of Zn 2+ with luteolin achieves fluorescent quenching detection of luteolin with low limit of detection of 16 nΜ and high selectivity. When it is utilized in fluorescent detection of luteolin in water and Chrysanthemum tea, mean recoveries are obtained from 99.5 % to 102.7 % and from 99.3 % to 100.6 %, respectively.
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NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 12
·4793-4800
·
IF 2.5
Rui Guo,Yuxin Sun,Junlai Jiang,Limei Zhang,Zhengyang Ji,Yi Jiang
Transition metal sulphides have received much attention due to their high theoretical specific capacity and good electrochemical stability. Among them, CuS has emerged as a favorable option owing to its affordability, diverse nanostructures, and metallic electronic conductance. However, despite its good initial capacitance performance, copper sulfide exhibits poor performance in terms of long-term stability. The doping of Zn can alter the crystal structure of copper sulfide, thereby enhancing its stability in electrochemical applications and improving the cycling stability of the supercapacitor. In this study, zinc-doped CuS materials were synthesized via a hydrothermal method and utilized as the positive electrode material for supercapacitors. Notably, in a three-electrode system, at a current density of 4 mA cm−2, the specific capacitance of the electrode material can reach 3980 mF cm−2. Moreover, at a current density of 20 mA cm−2, the capacitance retention rate reaches 85% after 5000 cycles. Furthermore, the assembled hybrid supercapacitor (Zn–CuS//activated carbon) maintains a capacitance retention rate of 78% after 4000 cycles at a current density of 20 mA cm−2. The excellent electrochemical performance observed in this study provides valuable insights for the design of high-performance electrode materials for supercapacitors.
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Environmental Science-Nano
·
2025
·
IF 5.1
Shuoli Ma,Wen-Xiong Wang
The toxicity of environmental pollutants is often manifested through metabolic disruptions and damage to detoxification organs. However, current understanding is insufficient to explain the physiological response mechanisms of metabolically abnormal fish exposed to secondary pollutants in complex natural environments. This study established a fish model with non-alcoholic fatty liver to evaluate the effects of Zn oxide nanoparticles (nZnO) and Zn²⁺ on physiological metabolism using untargeted lipidomics and bioimaging techniques. Nile red and hematoxylin and eosin (H&E) staining indicated that increased Zn levels reduced the number of lipid droplets (LDs) and hepatocyte vacuolization in the livers of groupers. Non-targeted lipidomics, employing an unsupervised K-means clustering algorithm, identified key lipid profiles that differentiated the effects of nZnO and Zn, including TG (16:0/16:1/18:1), PC (18:2/22:6), TG (18:2/18:2/22:6), SM (d18:1/24:1), and TG (16:1/18:1/18:2). The increased content of SM (d18:1/24:0) indicated that fish liver cells internalized nZnO via lipid raft structures on the cell membrane, a process distinct from Zn ion uptake. Moreover, nZnO/Zn treatments significantly activated lipolysis regulation in fish liver experiencing oxidative stress. This study contributed to the use of non-targeted lipidomics to identify differential biomarkers of nZnO and Zn, as well as their compensatory mechanisms in metabolically abnormal fish. These findings provide novel insights into the effects of nanometal exposure on aquatic animal health in complex environments.
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Heliyon
·
2024
·
IF 3.4
Yige Yan,Mohan Huang,Yongsheng Wang,Dawei He,Jiaqi He
Metal-organic frameworks (MOF) have been wildly synthesised and studied as electrode materials for supercapacitors, and bimetallic MOF of Ni and Co has been broadly studied to enhance both specific capacitance and stability of supercapacitors. Herein, a best performance (about 320 F/g) of Ni–Co bimetallic MOF was found in a uniform preparation condition by adjusting the ratio of Ni to Co. Then tiny third metal ion was introduced, and we found that the morphology of material has a significant change on the original basis. Furthermore, certain ions (Zn, Fe, Mn) introduced make a huge improvement in capacitance based on Ni–Co MOF of 320 F/g. The result shows that Zn–Ni–Co MOF, Fe–Ni–Co MOF and Mn–Ni–Co MOF perform specific capacitance of 1135 F/g, 870 F/g and 760F/g at 1 A/g, respectively. Meanwhile, the asymmetric supercapacitor (ASC) was constructed by Zn–Ni–Co MOF as positive electrode and active carbon (AC) as negative electrode. The Zn–Ni–Co MOF//AC ASC possesses a energy density of 58 Wh/kg at a power density of 775 W/kg. This research provides a new methods to regulate the morphology of MOF and a novel viewpoint for assembling high-performance, low-price, and eco-friendly green energy storage devices.
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