JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Yongchao Rao,Xiaosi Qi,Qiong Peng,Yanli Chen,Xiu Gong,Ren Xie,Wei Zhong
It was well recognized that the penetrated electromagnetic (EM) wave could be dissipated by means of magnetic loss, polarization loss and conduction loss. In order to improve their loss capacities and take full advantage of flower-like geometrical morphology, in this study, we proposed a simple route for the production of flower-like core@shell structure NiO/Ni@C microspheres through the carbon thermal reaction using NiO microflowers as precursor. The obtained results revealed that our proposed strategy successfully synthesized the core@shell structure magnetic carbon-based multicomponent nanocomposites without destroying the geometrical morphology of precursor. By regulating the annealing temperature, the as-prepared NiO/Ni@C microspheres with different contents of Ni and degrees of graphitization could be selectively synthesized, which effectively boosted their magnetic loss, polarization loss and conduction loss capabilities. Therefore, the elaborately designed NiO/Ni@C microspheres displayed the superior microwave absorption performances including strong absorption capability, broad absorption bandwidth and thin matching thicknesses compared to the NiO precursor. In summary, our findings not only provided a simple route to design and synthesize flower-like core@shell structure magnetic carbon-based nanocomposites as novel microwave absorbers, but also presented an effective strategy to comprehensively improve their loss capacities.
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PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 18
·2496
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IF 5.3
Mengmeng Pan,Ming Wang,Linjiao Yang,Yongli Song,Ming Jiang,Xu Yu,Li Xu
Alkaline phosphatase (ALP) is a phosphomonoester hydrolase and serves as a biomarker in various diseases. However, current detection methods for ALP rely on bulky instruments, extended time, and complex operations, which are particularly challenging in resource-limited regions. Herein, we synthesized a MOF-derived Fe-N-C nanozyme to create biosensors for the coulometric and visual detection of ALP. Specifically, we found the Fe-N-C nanozyme can efficiently oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to generate blue-colored tetramethyl benzidine (TMBox) without the need for H2O2. To construct the biosensor, we incorporated the ALP enzymatic catalytic reaction to inhibit the oxidation of TMB by Fe-N-C oxidase nanozyme. This biosensor showed rapid and highly sensitive detection of ALP in both buffer and clinical samples. The limit of detection (LOD) of our approach could be achieved at 3.38 U L−1, and the linear range was from 5 to 60 U L−1. Moreover, we also developed a visual detection for ALP by using a smartphone-based assay and facilitated practical and accessible point-and-care testing (POCT) in resource-limited areas. The visual detection method also achieved a similar LOD of 2.12 U L−1and a linear range of 5–60 U L−1. Our approach presents potential applications for other biomarker detections by using ALP-based ELISA methods.Keywords:metal-organic framework;nanozyme;oxidase-like enzyme;alkaline phosphatase;visual detection
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高影响因子
Nano Research
·
2023
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IF 9.9
Liu Guangyong,Lu Yumiao,Lu JunFeng,Wang Yanlei,Liang Shijing,He Hongyan,Jiang Lilong
Electrocatalytic depolymerization of lignin into value-added chemicals offers a promising technique to make biorefining sustainable. Herein, we report a robust trimetallic PdNiBi electrocatalyst for reductive C-O bond cleavage of different lignin model dimers and oxidized lignin under mild conditions. The reduction reaction proceeds with complete substrate conversion and excellent yields toward monomers of phenols (80%–99%) and acetophenones (75%–96%) in the presence of an ionic liquid electrolyte with operational stability. Systematic experimental investigations together with density functional theory (DFT) calculations reveal that the outstanding performance of the catalyst results from the synergistic effect of the metal elements, which facilitates the easier formation of a key C α radical intermediate and the facile desorption of the as-formed products at the electrode. The results open up new opportunities for lignin valorization through the green electrocatalytic approach.
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MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Enbo Li,Yu Bai,Peng Zhang,Hongxia Liu,Wen Ma,Yingwei Qi,Te Wang,Ziqian Zhang,Sinan Gao
Electronic structure adjustment on materials' surfaces often leads to materials obtaining novel performances. Flake Al powder is a classical low infrared emissivity material at room temperature. However, this powder shows intense infrared radiation over 500 °C due to its high-temperature oxidation , which restricts flake Al powder's application as low infrared radiation material in higher temperatures. For this reason, the Al@ZrO 2 composite was prepared by a solvothermal method to improve its thermostability. This composite can be used as low infrared radiation material over 500 °C for the long term, even at 700 °C for a short time. According to the experimental and theoretical investigation, a delocalization bond of Al–O–Zr is formed in the interface between the Al surface and ZrO 2 so that the Al surface's electronic structure is adjusted. This change of electronic structure weakens the electroaffinity of Al atoms to bond with the electron-rich groups, and the oxidation reaction of Al needs to proceed in a higher-temperature range. In this case, flake Al powder coating with ZrO 2 holds its metal properties with low infrared emissivity over 500 °C. The Al@ZrO 2 composite could be used in a higher temperature range as a low infrared radiation material.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liangri Ying,Fei Liang,Zhen Huang,Jing Ding,Weilong Wang,Shule Liu,Jianfeng Lu
Solar-driven steam generation is widely considered as a promising strategy for desalination. However, before this technology can be practically implemented, certain challenges such as suboptimal steam generation rates and inevitable salt deposition need to be addressed. In this study, we propose a novel bilayer structure aerogel (MS-aerogel), which confines urchin-like MoS 2 /Mo 5 N 6 /C in a biomass gelatin substrate to achieve high-efficiency desalination in high concentration brine solutions. The urchin-like MoS 2 /Mo 5 N 6 /C that hybrid semiconductor MoS 2 , plasmonic Mo 5 N 6 and porous carbon performs superior light-to-heat conversion performance to its individual components. Additionally, under the collaborative action of hydrophilic groups and unique nanostructured surface, the MoS 2 /Mo 5 N 6 /C exhibits a notable reduction in interface evaporation enthalpy from 2405.8 to 1694.6 J g −1 . Taking into consideration the comprehensive thermal management performance, the self-floating MS-aerogel achieves an excellent evaporation rate of 1.89 kg m -2 h −1 under one sun irradiation. Furthermore, the vertically aligned vessels present in the MS-aerogel facilitate salt transportation, effectively preventing crystalline salt accumulation on the evaporator surface. Consequently, even after continuous 12 h desalination in 20 wt% brine, the MS-aerogel maintains an outstanding evaporation rate of 1.54 kg m -2 h −1 , surpassing most reported self-floating evaporators. This research offers a valuable reference for the design of high-efficiency and salt-resistant solar evaporators.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yinan Zhao,Wenhao Yang,Ao Yu,Ping Peng,Fang-Fang Li
Zinc-carbon composite materials are promising anode materials for lithium-ion batteries (LIBs). However, volume expansion of Zn deteriorates the capacity and cycling stability. Fabricating carbon-encapsulated Zn structures represents an effective strategy for mitigating the volume expansion of Zn. In this study, we present a facile molten salt electrolysis approach, in which a liquid Zn anode and CO 2 were strategically utilized to facilitate the synthesis of core–shell Zn@C nanospheres embedded in a honeycomb-like porous carbon matrix (Zn@C/PC). The Zn 2+ ions, generated in-situ through the oxidation of Zn anode surface, undergo co-reduction with the CO 2 -replenished CO 3 2– , resulting in the production of Zn@C/PC series. Benefiting from its composition and structure, the optimal Zn@C/PC shows high reversible capacity (1271 mA h g −1 at 50 mA g −1 ) and superior cycling stability, with a capacity retention rate of 81.4 % after 1250 cycles under 2 A g −1 . The introduced liquid-anode-assisted molten salt electrolysis offers a novel approach for producing high-performance energy storage materials. Moreover, conversion of CO 2 into materials applicable to energy applications represents a promising pathway for advancing carbon neutrality.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Mengyi Zhang,Xiaohui Sun,Xudong Cai,Xiaolu Zhan,Yufei Wu,Xuyang Zhang,Guohua Wu,Xiangwei Wang
In the field of electromagnetic wave (EMW) absorption, carbon matrix materials based on metal–organic frameworks (MOFs) have drawn more interest as a result of their outstanding advantages, such as porous structure, lightweight, controlled morphology, etc. However, how to broaden the effective absorption bandwidth [EAB; reflection loss (RL) ≤ −10 dB] is still a challenge. In this paper, large microsphere structures of a Co/C composite composed of small particle clusters were successfully prepared by the solvothermal method and annealing treatment. At a filling ratio of 40 wt %, the Co/C composite shows attractive microwave absorption (MA) performance after being annealed at 600 °C in an atmosphere of argon. With an EAB of 6.32 GHz (9.92–16.24 GHz) and a thickness of just 2.57 mm, the minimum RL can be attained at −54.55 dB. Most importantly, the EAB can attain 7.12 GHz (10.88–18.0 GHz) when the thickness is 2.38 mm, which is larger than that of the majority of MOF-derived composites. The superior MA performance is strongly related to excellent impedance matching and a higher attenuation constant. This study provides a simple strategy for synthesizing a MOF-derived Co/C composite with a wide EAB.
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高影响因子
Energy Technology
·
2023
·Vol. 12
·期 3
·2300736
·
IF 3.8
Peilong Zhou,Xinwei Geng,Dongxu Yao,Yongfeng Xia,Yu-Ping Zeng
Traditional carbon materials suffer from weak adsorption of lithium polysulfides and excessive consumption of electrolyte. A simple and feasible molten salt method is applied for constructing an active nanocrystalline TiC shell on the surface of porous carbon. The highly active TiC nanoshells endow the core–shell composite with efficient chemical–physical synergistic adsorption, which can effectively confine and convert polysulfides, thereby improving the electrochemical performance of lithium–sulfur batteries. The lithium–sulfur batteries assembled with modified separator deliver a high initial discharge specific capacity of 1396 mAh g −1 at a discharge rate of 0.5 C and a high capacity retention of 747.1 mAh g −1 after 500 cycles, with a high coulombic efficiency of 98% during cycling. Besides, this molten salt method can be applied to modify the porous carbon materials of various composite sulfur cathodes such as graphene, carbon nanotubes, and 3D nonwoven carbon fabrics.
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高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 38
·5420-5427
·
IF 3.1
Qian Chen,Ruonan Wang,Lin Liu,Zhiming Guan,Zhibin Zhu,Lixin Cao,Bohua Dong
Developing an acid-stable oxygen evolution reaction (OER) catalyst is essential for efficient water splitting; however, high overpotentials and poor stability severely hinder its development. Herein, we present the synthesis of ultra-thin carbon shell-coated grain boundary-rich Ru/RuO2 nanoparticles by molecule-assisted pyrolysis and a subsequent oxidation strategy, assembled into flexible nanosheets. Ru/RuO2@C is reported as a stable and active acidic OER catalyst that exhibits an ultralow overpotential of 173 mV in 0.5 M H2SO4 and a low degradation rate (0.075 mV h−1) over a 120 hours stability test. The systematic experimental results reveal that the carbon layer with high electrical conductivity acts as a protective layer against Ru/RuO2 dissolution and enhances the stability of the catalyst. The presence of grain boundaries within the core–shell structure enhances the catalytic activity of the catalyst, and the compression or stretching of the lattice strain at the grain boundaries results in faster electron transport at the electrode/electrolyte interface, thus providing more active sites for the OER. The outstanding activity and long-term stability indicate that Ru/RuO2@C could act as an efficient anode catalyst in proton exchange membrane (PEM) electrolyzers for water splitting.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Gang Li,Ruiyang Tan,Xiangcheng Lu,Xinyu Zhang,Chengcheng Zhang,Bohong Gao,Yuting Zhou,Ke Chen,Ping Chen,Xinyi Wang
Chemical composition and morphological optimization are both effective strategies for constructing excellent electromagnetic wave absorption (EMWA) materials. While efficient EMWA materials derived from both metal-organic frameworks (MOFs) and MXenes have been extensively studied, composites derived from the Hofmann framework with MXene have not been reported. In this study, we employed a Hofmann framework ([Fe(pz)Ni(CN) 4 ], pz = pyrazine) and MXene (Ti 3 C 2 T x ) to create new MXene@Hofmann (MH1 and MH2) composites, using a simple co-precipitation method with two different contents of [Fe(pz)Ni(CN) 4 ]. The FeNi/C/TiO 2 composites with a multi-layered structure inherited from MXene were prepared by annealing the MXene@Hofmann composites at 500, 600, and 700 °C, resulting in the formation of MH1-500/600/700 and MH2-500/600/700 composites. Their compositions, morphologies, electromagnetic parameters, and EMWA performances were characterized. For the composites with a high [Fe(pz)Ni(CN) 4 ] content, MH2-600 has a minimum reflection loss ( RL min ) value of −30.63 dB at a thickness of only 1.8 mm and the broadest effective absorption bandwidth (EAB) of 3.90 GHz at 2.0 mm, while MH2-700 exhibits superior EMWA performance with an RL min value of −34.34 dB at 1.9 mm and an EAB value of 4.96 GHz at 2.1 mm. Their impressive EMWA performance might be attributed to the synergistic dielectric loss and magnetic loss and also the impedance matching from the reasonable ratio of the magnetic and dielectric components. This work demonstrates an effective strategy for constructing EMWA materials from the Hofmann framework and MXene.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Huangqing Ye,Jiahui Chen,Songrui Wei,Yougen Hu,Yu Wang,Xian-Zhu Fu,Rong Sun
Copper/carbon (Cu/C) hybrids with two-dimensional (2D) dendritic-like structure were successfully synthesized by a one-pot biological hydrothermal method with biomass as the reducing agent, capping agent, and template. By hydrothermal carbonization, the graphitic carbon is in-situ coated on the surface of nano copper to obtain a new type of 2D Cu/C materials. This method was facile, green, tunable and scalable. The influential factors on the morphology and carbon content of as-prepared hybrids were investigated, and possible growth mechanism was proposed. The as-prepared Cu/C hybrid materials exhibited a smallest thickness of 2.5 nm, with a radius-to-thickness ratio as high as 10 3 . Benefiting from the typical 2D structure and graphitic carbon coating layer, Cu/C hybrids exhibited excellent oxidation resistance and electrical conductivity , thus having great potential as a conductive adhesive filler used in the field of flexible electronics.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Zihao Cui,Qianqian Zhang,Hui Fu,Qihao Liu,Xiaolei Liu,Yaqiang Wu,Peng Gao,Zeyan Wang,Zhaoke Zheng,Hefeng Cheng,Yuanyuan Liu,Ying Dai,Baibiao Huang,Peng Wang
Herein, a facile anti-solvent preparation strategy is proposed to fabricate lead-free halide perovskite Cs 3 Bi 2 Br 9 with TiO 2 , which boosts photocatalytic activation of C(sp 3 )−H bonds in toluene oxidation . TiO 2 not only works as nucleation center to reduce the particle size of perovskite, but could form type II heterojunction with Cs 3 Bi 2 Br 9 , thus improving the photocatalytic performance of the TiO 2 /Cs 3 Bi 2 Br 9 composite. Under AM 1.5 G simulated sunlight irradiation, the optimal TiO 2 /Cs 3 Bi 2 Br 9 composite exhibits both high production rate (9692.5 μmol g −1 h −1 ) and selectivity (91 %) of benzaldehyde product. As verified by in-situ ESR, in-situ FT-IR and DFT calculations, •O 2 − and h + are demonstrated to be the main active species in this process. This work provides a new insight into the design of high-performance lead-free perovskite photocatalysts for organic synthesis.
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高影响因子
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