Journal of Energy Storage
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2023
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IF 9.4
Qingmiao Zhang,Tianhao Yao,Qiangrui He,Heng Wang,Zhicheng Liu,Daquan Wang,Hongkang Wang,Lingjie Meng
Transition metal sulfides (TMSs) have been considered as up-and-coming anode materials for lithium-ion batteries (LIBs) owing to their large theoretical capacity and good reversibility . However, obvious volume variation and sluggish kinetics greatly limit their practical application. To address this issue, we successfully design and fabricate hollow CoS 2 /MoS 2 nanospheres and effectively enhance their lithium storage performance via N-doped carbon-coating (CoS 2 /MoS 2 @N-C). The unique hollow structure provides shortened ion-diffusion path, while the N-doped carbon shells buffer the severe volume changes during cycling and improve the electronic conductivity of the electrode. When used as an anode material for LIBs, the CoS 2 /MoS 2 @N-C displays high specific capacity (1056.9 mA h g −1 at 100 mA g −1 ), excellent cycling stability (653.9 mA h g −1 after 250 cycles at 1000 mA g −1 ), and rate capability (685 mA h g −1 at 2000 mA g −1 ). The CoS 2 /MoS 2 @N-C||LiFePO 4 full-cell LIB is also assembled and exhibits remarkable performance. The remarkable electrochemical performance of CoS 2 /MoS 2 @N-C electrode could be assigned to the synergistic enhancement effect of the N-doped carbon coating and hollow structure, which efficiently shorten the ion diffusion path , boost the charge transfer rate, and alleviated the volume changes of the electrode upon cycling.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Jing-Jing Luo,Ming-Shuai Sun,Boyuan Tang,Yan Zhou,Wen-Ting Chen,Wen-Qiang Gong,Song Han,Fei-Feng Mao,Zhang-Min Li,Duan-Jian Tao
Solvent-controlled hydrogenation of vanillin to 4-hydroxymethyl-2-methoxyphenol (HMP) or 2-methoxy-4-methylphenol (MMP) is an attractive topic in the field of bio-oil utilization. Herein, a nickel-based catalyst supported on a N-doped carbon material (Ni-N-C) was prepared by facile ball milling mixing and subsequent high-temperature calcination. The as-prepared Ni-N-C800 catalyst showed more than 99% MMP yield and good stability using pure H2O as a solvent under the given conditions. By using the mixed solvent H2O/ethyl acetate with a volume ratio of 1:5, the hydrogenation was conveniently tuned to produce the intermediate product HMP. Density functional theory (DFT) calculations further showed that the intermolecular forces of HMP interacting with ethyl acetate were much stronger than those interacting with H2O. Ethyl acetate could raise the energy barrier to keep vanillin hydrogenation in the intermediate HMP stage, and H2O reduced the energy barrier to accelerate the final product MMP formation.
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ACS Applied Nano Materials
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2023
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IF 5.9
Shujing Liu,Pengshuo Fan,Ying Yao,Yinghao Chang,Dong Yang,Changchun Wang,Jia Guo
Two-dimensional (2D) covalent organic polymers (COPs) featuring large surface areas and exposed active sites are desirable in the modification of electrode materials for electrochemical reactions. However, the rigid and planar conformation of 2D COPs limits the wrap of one-dimensional electrodes. Herein, we have proposed a molecular strategy to regulate in situ encapsulation of carbon nanotubes (CNTs) with 2D polyphosphazene. The stoichiometric control over the nucleophilic substitution reaction between hexachlorocyclophosphazene and amines allows for the oriented evolution around the surface of CNTs. The formed COP sheath is an ultrathin and uniform coating without granular deposition. Upon carbonization, the well-defined core/shell CNT composite was converted into the N,P-codoped carbon, exhibiting outstanding electrocatalytic oxygen reduction performance with a diffusion-limiting current density of 5.4 mA cm–2 and an electron transfer number of 3.97. The improved electrocatalytic activity originates from a high content of active N,P-containing catalytic sites uniformly distributed on porous carbon. This study provides a viable strategy to develop functional composite materials by modulating the flexibility of 2D COPs for 1D substrates, contributing to broad applicability.
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MOLECULES
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2023
·Vol. 28
·期 11
·4257
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IF 4.6
Qianhui Ma,Guifa Long,Xulei Tang,Xiaobao Li,Xianghui Wang,Chenghang You,Wenjun Fan,Qingqing Wang
The development of highly active and low-cost catalysts for use in oxygen reduction reaction (ORR) is crucial to many advanced and eco-friendly energy techniques. N-doped carbons are promising ORR catalysts. However, their performance is still limited. In this work, a zinc-mediated template synthesis strategy for the development of a highly active ORR catalyst with hierarchical porous structures was presented. The optimal catalyst exhibited high ORR performance in a 0.1 M KOH solution, with a half-wave potential of 0.89 V vs. RHE. Additionally, the catalyst exhibited excellent methanol tolerance and stability. After a 20,000 s continuous operation, no obvious performance decay was observed. When used as the air–electrode catalyst in a zinc–air battery (ZAB), it delivered an outstanding discharging performance, with peak power density and specific capacity as high as 196.3 mW cm−2and 811.5 mAh gZn−1, respectively. Its high performance and stability endow it with potential in practical and commercial applications as a highly active ORR catalyst. Additionally, it is believed that the presented strategy can be applied to the rational design and fabrication of highly active and stable ORR catalysts for use in eco-friendly and future-oriented energy techniques.Keywords:oxygen reduction reaction;highly active and stable catalysts;hierarchical porous structures;N-doped carbons;zinc–air battery
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AQUATIC TOXICOLOGY
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2023
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IF 4.5
Qiang Luo,Liping Ai,Shuqiong Tang,Hua Zhang,Jinze Ma,Xiaoping Xiao,Keyuan Zhong,Guiyou Tian,Bo Cheng,Cong Xiong,Xiaobei Chen,Huiqiang Lu
Ethyl 3-(N-butylacetamido) propanoate (EBAAP) is one of the most widely used mosquito repellents worldwide, and is also commonly used to produce cosmetics. Residues have recently been detected in surface and groundwater in many countries, and their potential to harm the environment is unknown. Therefore, more studies are needed to fully assess the toxicity of EBAAP. This is the first investigation into the developmental toxicity and cardiotoxicity of EBAAP on zebrafish embryos. EBAAP was toxic to zebrafish, with a lethal concentration 50 (LC50) of 140 mg/L at 72 hours post fertilization (hpf). EBAAP exposure also reduced body length, slowed the yolk absorption rate, induced spinal curvature and pericardial edema, decreased heart rate, promoted linear lengthening of the heart, and diminished cardiac pumping ability. The expression of heart developmental-related genes ( nkx2.5, myh6, tbx5a, vmhc, gata4, tbx2b ) was dysregulated, intracellular oxidative stress increased significantly, the activities of catalase (CAT) and superoxide dismutase (SOD) decreased, and malondialdehyde (MDA) content increased significantly. The expression of apoptosis-related genes ( bax/bcl2, p53, caspase9, caspase3 ) was significantly upregulated. In conclusion, EBAAP induced abnormal morphology and heart defects during the early stages of zebrafish embryo development by potentially inducing the generation and accumulation of reactive oxygen species (ROS) in vivo and activating the oxidative stress response. These events dysregulate the expression of several genes and activate endogenous apoptosis pathways, eventually leading to developmental disorders and heart defects.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2023
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IF 5.2
Yu-Jie Lai,Jun-Yang Ji,Hui-Fang Wang,Zheng Niu,Jian-Ping Lang
Adsorption sites play an essential role in gas separation. We introduce N-oxide groups into MOFs to investigate the binding interactions between N-oxide groups and light saturated hydrocarbons for the first time. MOF-808-INO with N-oxide groups shows great performance to separate the mixture of methane, ethane and propane. Remarkably, MOF-808-INO exhibits a very low heat of adsorption of propane, which is important for pre-activation. The cycling experiments reveal that subsequent activation is only required at room temperature with nitrogen purging for several hours, indicating that MOF-808-INO has immense potential applications for recycled materials.
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JOURNAL OF COORDINATION CHEMISTRY
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2023
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IF 1.9
Ming-Ming Wang,Xiaofei Kuang,Ting-Ting Li,Hui Yang,Ying-Hao Mi,Ying-Chao Xu,Can-Zhong Lu
Luminescent Cu(I) complexes have drawn considerable attention as alternative materials to precious transition metal complexes due to their low cost and electron configuration. Discrete heteroleptic diamine-diphosphine copper(I) complexes have been investigated owing to their outstanding photophysical features. However, heteroleptic copper(I) coordination polymers remain mostly unexplored. Herein, we report the synthesis and photophysical characterization of a heteroleptic copper(I) coordination polymer by employing bidentate oxybis(2,1-phenylene)bis(diphenylphosphine) (POP) diphosphine and nitrogen heterocyclic 5-[4-(1-imidazolyl)phenyl]-2H-tetrazole (ipt) as ligands. By utilizing the mixed-solvent strategy, a one-dimensional (1D) linear chain was constructed under solvothermal reaction conditions. Temperature-dependent emission spectra combined with decay time measurements demonstrate that emission originated from triplet phosphorescence at ambient temperature.
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CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Shungui Deng,Xiaotang Shi,Yue Zhao,Chao Wang,Jinghua Wu,Xiayin Yao
Lithium sulfur (Li-S) batteries hold promise as next-generation high energy density devices due to their high theoretical capacities. However, their commercialization confronts great challenges, in particular the notorious shuttle effect and sluggish kinetics, making it difficult to realize high sulfur loading and cell energy density properties. Herein, we explore the potential of molybdenum carbide (Mo 2 C) as the cathode catalyst to promote the polysulfide conversion. Nanosized Mo 2 C embedded porous carbon network (Mo 2 C@PCN) are prepared through the pyrolysis of molybdenum and chitosan precursor. Both electrochemical performance and theoretical calculations reveal that introducing the Mo 2 C can not only enhance the affinity toward the polysulfide intermediate, but also significantly accelerate the polysulfide interconversion compared with that of the pristine porous carbon network (PCN), thereby endowing the Li-S batteries with excellent cycling stability with a low capacity decay of 0.034 % per cycle over 600 cycles, and superb rate capability of 644 mAh g −1 at 5 A g −1 .
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Hongwei Liang,Guanghui Wu,Hongwei Zhang,Qunhong Liu,Qin Yang,Shaohui Xiong,Yuanyuan Yue,Pei Yuan
Mesoporous hollow carbon spheres have been considered as promising adsorbents for volatile organic compounds (VOCs) removal. However, the influence of the morphologies and structures on the adsorption performance of VOCs is still unclear. Herein, we developed a novel strategy for the controllable synthesis of nitrogen-doped mesoporous hollow carbon nanomaterials with adjustable morphologies and structures. By simply tuning tetraethyl orthosilicate addition time and ammonia amount in Stöber system, bowl-like, hollow, and yolk-shell carbon nanomaterials can be obtained. When used as toluene adsorbents, the bowl-like materials exhibited a capacity of 190 mg/g, higher than other carbon materials with different morphologies. The high adsorption capacity and fast adsorption rate of the bowl-like structures can be attributed to the high surface area, rich microporous/mesoporous structure and unique morphology. Our work provides a new strategy for the designed synthesis of novel VOCs adsorbents with advanced adsorption performance.
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ACS Applied Materials & Interfaces
·
2021
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IF 9.229
Ningning Zhu,Kaixuan Xu,Jun Xing,Jun Zhang,Jiangnan Dai
In quasi-two-dimensional (quasi-2D) perovskite films, carriers transport in the cascade structural systems involving various quantum wells (QWs) n, but their efficiency is limited by the severe nonradiative recombination within plentiful n = 1, 2, 3 domains induced by traditional ammonium bromide passivation. Here, we fabricate the quasi-2D films with the elimination of n = 1, 2, 3 domains by introducing the ionic liquid n-butylamine acetate (BAAc) instead of n-butylamine hydrobromide (BABr), which increases the photoluminescence quantum yield (PLQY) and lowers the surface roughness of films. Due to the anion exchange between BAAc and methylamine hydrobromide (MABr), BAAc exhibits a sole passivation effect on methylamine-based perovskites. As a result, the ionic liquid-derived perovskite light-emitting diodes (PeLEDs) display blue emission at 479 nm and show significantly improved performance on external quantum efficiency (EQE) and luminance. Our finding provides insights into the passivating effect of ionic liquid on quasi-2D perovskites and will benefit fabricating PeLEDs with enhanced performance.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
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IF 19.503
Peng Huang,Peng Zhang,Cuiping Wang,Jingchun Tang,Hongwen Sun
Persulfate-based (PS-based) advanced oxidation process is a promising technology for degradation of organic pollutants . PS activation needs efficient and economical catalysts and heterogeneous Fe-carbon composites are competitive. Herein, novel N-doped biochar-loaded nanoscale zero-valent iron (nZVI) composites (Fe@N-BC) were synthesized and evaluated for PS activation. Detailed characterization data indicated that graphitic and pyridine N structures were introduced by N-doping, which enhanced the anchoring, dispersion and loading of amorphous nZVI on biochar. Remarkably, the optimized Fe@N-BC material, Fe@N 2 -BC 900 , presented excellent catalytic performance for PS activation for lindane removal. The N-doped defects in biochar acted as reactive bridges and accelerated the electron transfer between nZVI and PS, showing strong synergistic effects toward nZVI. O 2 • − and 1 O 2 were the dominant active species in catalytic systems. Additionally, Fe@N 2 -BC 900 catalyst showed effectiveness over a wide pH range for lindane removal. This work provides a new approach to the rational design and application of Fe@N-BC for persulfate activation in pollution control, which is certified by deep exploration of reaction mechanism.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
·
IF 2.694
Huijuan Li,Shunguo Qiu,Li Chen,Taotao Fan,Xiong Peng,Zongcheng Yan
A deep eutectic solvent (DES)-based aqueous biphasic system (ABS) denotes a clean and highly biocompatible separation and purification technology, but the explanations of the phase formation mechanism and phase behavior of a DES-based ABS are incomplete. To improve the study of the formation mechanism of a DES-based ABS, a new ABS composed of n-propanol (NPA) and DES with betaine as the hydrogen-bond acceptor (HBA) and polyol as the hydrogen-bond donor (HBD) was formed. The phase formation mechanism of this new ABS and the stability of the DES in the ABS were studied. Betaine and three polyols are hydrophilic (log KOW < 0), whereas NPA is relatively hydrophobic (log KOW > 0). Two phases were formed, because the two components of DES were incompatible with the NPA. The molar ratio of the HBA and HBD in the two phases differed, but in the bottom phase of this ABS, the stoichiometric ratio of HBA and HBD was the same as their initial ratio. Under certain conditions, this novel ABS was considered a ternary-like system. The combination of a series of factors, such as HBD hydrophilicity, molar volume, molecular weight, and initial molar ratio of HBA and HBD, affected the final stoichiometric ratio of HBA and HBD in the top phase.
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