SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Fangming Deng,Yigang He,Guolong Shi,Bing Li,Xiang Wu
Gaseous sensor system was developed for the detection of sulfur hexafluoride vapor based on its cataluminescence (CTL) emission by using coral-like Zn-doped SnO 2 composite. The test architecture, experiment characteristics and optimal conditions were studied in detail under optimized experiment conditions. Results showed that the gas sensor system covered a linear detection range from 8 mg/L to 5600 mg/L (R = 0.9963, n = 7) with a detection limit of 6.2 mg/L (S/N = 3), which was below the standard permitted concentration. The sensor showed a rapid response of 2 s and a recovery time of 30 s, respectively. Moreover, pattern recognition method was used to test the recognizable performance of this sensor, which has found that analyte can be distinguished clearly. As sensing materials for a CTL gas sensor, this coral-like Zn-doped SnO 2 demonstrates excellent CTL behavior (that is, high sensitivity, superior selectivity to sulfur hexafluoride compared with other eleven kinds of common volatile organic compounds (VOCs) as well as a fast response and recovery). The excellent sensing properties including improved sensitivity, selectivity and stability proved this sensor to be a promising candidate for detecting gas contaminants.
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DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Lei You,Shunlong Ju,Jianwen Liu,Guanglin Xia,Zaiping Guo,Xuebin Yu
Li metal is the most ideal anode material for next-generation high energy lithium-ion batteries. The uncontrollable growth of Li dendrites, however, hinders its practical application. Herein, we propose the adoption of Zn nanoparticles uniformly embedded in N-doped carbon polyhedra homogeneously built on carbon cloth (Zn@NC@CC) to prevent the formation of Li dendrites. Based on theoretical calculation and experimental observation, lithiophilic Zn nanoparticles and N-doping inside of the as-synthesized Zn@NC play a synergistic role in enhancing the adsorption capacity with Li, thus resulting in uniform Li deposition and complete suppression of Li dendrites. Moreover, the porous N-doped carbon polyhedras uniformly distributed on carbon cloth effectively relieves the volume change of Li upon repeated Li stripping/plating process, which contributes to preserving the structural integrity of the whole electrode and hence enhancing its long-term cycling stability. Benefiting from these synergistic effects, the Li-Zn@NC@CC electrode delivers a prolonged lifespan of over 1200 h at 1 mA cm −2 with an areal capacity of 1 mA h cm −2 in symmetric cells and high Coulombic efficiencies of 95.4% under an ultrahigh capacity of 12 mA h cm −2 . Remarkably, Li-Zn@NC@CC//LiFePO 4 full cells deliver a high reversible capacity of 110.2 mA h g −1 at 1C over 200 cycles.
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高影响因子
CATALYSIS LETTERS
·
2017
·Vol. 147
·期 9
·2410-2420
·
IF 2.799
Zanon Adriano,Chaemchuen Somboon,Verpoort Francis
Abstract Three different bimetallic zinc-cobalt zeolitic imidazolate frameworks (ZIFs) were successfully synthesized at room temperature in water through a green and simple procedure and tested as catalysts for the Knoevenagel condensation reaction between p -Br-benzaldehyde and malononitrile as model reaction. The materials were characterized with various techniques (XRD, ICP-AES, SEM, N 2 adsorption–desorption, TGA) and displayed excellent activities and selectivities. Moreover, the crystalline structure was preserved and the catalysts could be reused at least four times with negligible loss of activity. Graphical Abstract
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Fangyi Pei,Zhimiao Wang,Jianhua Lv,Fang Li,Wei Xue
Cu–Zn–Al catalyst was prepared by the co-precipitation method, and the catalytic performance for transfer hydrogenation of acetophenone (AP) to 1-phenylethanol (1-PhE) was evaluated using isopropanol (IPA) as a hydrogen source. The addition of Zn changed the morphology of the catalyst and reduced aggregation of catalyst particles, resulting in highly dispersed Cu active sites. As the Zn content increased, the valence state of Cu species changed. When the Cu/Zn molar ratio was 2/3, the Cu+/Cu0 ratio in the catalyst was 0.81, resulting in good selectivity for 1-PhE. The reaction conditions were optimized over the Cu–Zn–Al catalyst with a Cu/Zn molar ratio of 2/3. When the reaction was performed at 180 °C for 2 h with an IPA/AP molar ratio of 15, the AP conversion was 89.4% and the 1-PhE selectivity was 93.2%. The Cu–Zn–Al catalyst showed good stability, and AP conversion and the 1-PhE selectivity were essentially unchanged after five cycles.
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高影响因子
Materials Today Physics
·
2020
·
IF 10.443
S. Pan,L. Liu,Z. Li,X. Yan,C. Wang,K. Guo,J. Yang,Y. Jiang,J. Luo,W. Zhang
Complex diamond-like chalcogenides , A 2 Cu 3 In 3 Te 8 (A = Zn, Cd, Mn, Mg), were discovered and demonstrated to be promising thermoelectric materials in our prior work. Here we disclose that in-situ nanodomains coherently embedded in the A 2 Cu 3 In 3 Te 8 (A = Zn, Cd) matrixes are generated by the chemical composition fluctuation. Cations enter into the interstitial lattice sites to form in-situ nanodomains, which slightly influence electron migration but effectively scatter phonons . The nanodomains can be successfully tailored by further composition fluctuation with the substitution of Cu + for A 2+ , resulting in significantly improved electrical transport properties and reduced lattice thermal conductivity . The peak zT values of ∼1.0 and 1.2 at 873 K are achieved for Zn 1.6 Cu 3.4 In 3 Te 8 and Cd 1.6 Cu 3.4 In 3 Te 8 , respectively, exceeding the hitherto reported zT values among quaternary diamond-like chalcogenides. Manipulating in-situ nanodomains in A 2 Cu 3 In 3 Te 8 by introducing chemical composition fluctuation renders a promise in enhancing thermoelectric efficiency by nanostructure engineering within the complex thermoelectric materials.
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高影响因子
Journal of CO2 Utilization
·
2017
·
IF 4.292
Adriano Zanon,Somboon Chaemchuen,Bibimaryam Mousavi,Francis Verpoort
A newly Zn-doped ZIF-67 has been synthesized in water at room temperature for the first time without the aid of any organic solvent. The textural and physical properties of the material were analyzed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), N 2 adsorption-desorption, scanning electron microscopy (SEM) and ICP-AES. The catalyst showed quantitative conversions and selectivity for the synthesis of cyclic carbonates starting from epoxides and carbon dioxide. Compared with different reported MOFs as heterogeneous catalysts used for the cycloaddition of carbon dioxide to epoxides, this catalyst outperforms all the reported ones till now. The coupling reaction was studied at different pressures and temperatures applying different epoxide substrates. Additionally, no co-catalyst and solvent were required to obtain excellent conversions. The heterogeneous nature of the catalyst was maintained at least up to four catalytic cycles with a slight loss of activity.
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高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-12
·
IF 10.2
Qiu Lirong,Ouyang Chengcheng,Zhang Wei,Liu Jia,Yu Luting,Chen Guoguang,Ren Lili
Atopic dermatitis (AD) is a chronic and recurrent inflammation disease associated with immune dysfunction. The high level of reactive oxygen species (ROS) causes high oxidative stress and further results in the deterioration of AD. At the same time, the ROS produced by bacterial infection can further aggravate AD. Here, the prepared PVA-based hydrogel (Gel) has a high ROS scavenging ability, and the antibacterial agent Zn-MOF(ZIF-8) loaded into the hydrogel shows a lasting and effective antibacterial activity. Thus, a Zn-MOF hydrogel (Gel@ZIF-8) is prepared to regulate ROS-mediated inflammatory microenvironment. In vitro experiments show that Gel@ZIF-8 has good antibacterial effect and cell biocompatibility. In the AD-induced mouse model, Gel@ZIF-8 can significantly enhance the therapeutic effect, such as reduce the thickness of epidermis, the number of mast cells and IgE antibodies. The results indicate that the ROS-scavenging hydrogel could treat the AD by regulating the inflammatory microenvironment, providing a promising treatment for managing AD.
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PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 17
·5427
·
IF 4.927
Song Li,Jing Yan,Qiangqiang Zhu,Xinxiang Liu,Senlin Li,Shenhou Wang,Xuanjun Wang,Jun Sheng
Tea contains high levels of the compound epigallocatechin gallate (EGCG). It is considered an important functional component in tea and has anti-cancer, antioxidant, and anti-inflammatory effects. The eight phenolic hydroxyl groups in EGCG’s chemical structure are the basis for EGCG’s multiple biological effects. At the same time, it also leads to poor chemical stability, rendering EGCG prone to oxidation and isomerization reactions that change its original structure and biological activity. Learning how to maintain the activity of EGCG has become an important goal in understanding the biological activity of EGCG and the research and development of tea-related products. Metal–organic frameworks (MOFs) are porous materials with a three-dimensional network structure that are composed of inorganic metals or metal clusters together with organic complexes. MOFs exploit the porous nature of the material itself. When a drug is an appropriate size, it can be wrapped into the pores by physical or chemical methods; this allows the drug to be released slowly, and MOFs can also reduce drug toxicity. In this study, we used MOF Zn(BTC)4materials to load EGCG and investigated the sustained release effect of EGCG@MOF Zn(BTC)4and the biological effects on wound healing in a diabetic mouse model.Keywords:EGCG;MOF;wound healing;diabetes
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PubMed
高影响因子
ChemElectroChem
·
2021
·Vol. 9
·期 2
·e202101351
·
IF 4.59
Gang Ni,Zhao Hao,Guo Yin Zou,Fu Hu Cao,Ling Qin,Cheng Gang Zhou
Graphical An aqueous Zn-based battery with a Berlin green cathode, a K/Zn hybrid electrolyte, and a zinc metal anode are developed. Owing to the rapid insertion and transportation of K ions in the cathode materials and the good compatibility of electrolytes to the metal anode, the hybrid battery delivers improved rate capability and cycle performance. : Aqueous rechargeable zinc-based batteries with the advantages of sustainability, safety, and low cost, are suitable for large-scale electrochemical energy storage applications. In this work, aqueous zinc-based batteries with low defect Berlin green (FeHCF) cathode, a hybrid zinc triflate and potassium triflate electrolyte, and zinc anodes are developed. In the hybrid electrolyte, the K + ions with the weak solvation effect and small electrostatic interaction are the dominant intercalation species in the FeHCF, resulting in the fast charge transfer process and rapid diffusion kinetics. The Zn 2+ ions stay at the surface rather than penetrate into the bulk phase. Thus, the hybrid batteries deliver a high specific capacity of 169.2 mAh g −1 at 100 mA g −1 , excellent rate performance with 45.7 mAh g −1 at 6 A g −1 , and good long-term cyclability with a capacity retention of 57 % over 1000 cycles at 1 A g −1 . The results suggest using aqueous K/Zn hybrid electrolytes can improve the electrochemical performance of FeHCF.
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高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Tong Wu,Lei Kang,Fan Liu,Ruixin Guo,Shu Guo,Tianhong Huang,Shuangyue Shang,Lijuan Liu,Xiaoyang Wang
Cation regulation is a compelling strategy for developing new compounds with optimized crystal structure by atomic-scale manipulation. Herein, we report two new SBBO-like fluoroberyllium borates, SrMgBe₂(BO₃)₂F₂ (SMBBF) and SrZnBe₂(BO₃)₂F₂ (SZBBF). They crystallize in a trigonal system and feature a [Be₃B₃O₆F₃]∞ single layer stabilized by the incorporation of Mg²⁺/Zn²⁺ cations and F⁻ cations. Both compounds exhibit deep-UV absorption edges below 200 nm. Theoretical calculations confirm their potential as deep-UV birefringent materials, with correspinding birefringence values of 0.064 (SMBBF) and 0.063 (SZBBF) at 589 nm, respectively. This work demonstrates the effectiveness of cation regulation in designing novel borate-based optical materials.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 1
·628-632
·
IF 1.556
Hu Xin,Miao Yuqing,Zhou Shilin,Liang Xiaocai
Here we report a Bi/mesoporous carbon modified glass carbon electrode (Bi-MC-GCE) for the detection of heavy metal ions Zn, Cd and Pb. Bi(NO3)3 was firstly entrapped into the holes of MCs by sonicating them together in solution. Then the dispersed mixture was pipetted
onto the surface of GCE and left to dry. Bi(NO3)3 in the holes of MCs was reduced to metallic Bi during the process of deposition for square wave stripping analysis. The obtained Bi-MC-GCE exhibits significantly enhanced sensitivity for Zn, Cd and Pb detection compared
to blank GCE, bismuth or MC alone modified GCE, which is attributed to the high specific surface area of MCs and the increased amount of entrapped bismuth as active sites for the deposition and stripping of heavy metal ions. A linearship is observed for the concentration of Zn, Cd, and Pb
from 10 to 110 ppb. The relative standard deviation was 3.7% for Zn, 3% for Cd and 8% for Pb at the 90 ppb level (n = 3). The suggested Bi-MC-GCE exhibits a potential application for real water sample analysis.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xiaoyue Li,Penghui Li,Yingjie Li,Haitang Liu,Zongzheng Yang,Yanyan Chen,Xiaoyuan Liao
In situ generation of H 2 O 2 by photocatalyst with sterilization is an environmentally friendly method. In this work, we prepared three kinds of Zn-based ZIFs materials, i.e., MAF-6, ZIF-11 and ZIF-71, and systematically investigated their application in the area of photocatalytic H 2 O 2 production, and antibacterial efficiency. It is found that MAF-6 had the best ability of generate H 2 O 2 (1005 μmol h -1 g -1 ), 1.6 times more than ZIF-11, while ZIF-71 produced almost no H 2 O 2 . The sterilization rate of MAF-6 against Staphylococcus aureus and Escherichia coli can reach 97% and 91% in 3 h, respectively. It is worth noting that the more photo-generated reactive oxygen species (∙OH and ∙O 2 - ) are produced, the better sterilization effect . This work provides new material and insights into photocatalytic sterilization by in situ H 2 O 2 generation.
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