CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yutian Cai,Runyang Zhou,Shanshan Zhang,Mengke Qiao,Yongzhi Cheng,Yingli Zhu,Hui Luo,Pingan Chen,Xiangcheng Li,Fu Chen
MOFs-derived magnetic carbon-based composites exhibit great application potentials in electromagnetic absorption field. Nowadays, the MOF-on-MOF hybrid materials, constructed by self-assembly of two or more MOFs, gradually become the prevailing precursors for efficient microwave absorbers due to the flexible structure and component design which are beneficial to improving microwave attenuation and optimizing impedance matching. Herein, the binary MOF-on-MOF hybrid templates MIL-88A@ZIF-67 has been fabricated based on a surfactant-assisted growth strategy, and subsequently thermally converted into the spindle-like Co 3 Fe 7 @NC/magnetic MWCNTs composites (CFM) through a DCDA-assisted carbothermal reduction method. It has been revealed that the carbothermal temperature could not only regulate the crystallinity of Co 3 Fe 7 alloys and magnetism of CFM composites, but also make significant impact on chemical and mesoscopic structure of conductively hierarchical architecture composed by surficial MWCNTs and pyrolytic carbon derived from various ligands of different MOFs. Among the three proposed absorbers in this work, the CFM-700 sample with densest surficial magnetic MWCNTs achieved a satisfied balance between intrinsic microwave consumption and impedance matching due to the magnetic-dielectric synergistic effect. The reflection loss of CFM-700 could keep staying below −20 dB in an ultra-wide range from 3.6 GHz to 18.0 GHz when the thickness varies from 1.3 mm to 5.45 mm. Moreover, the minimum reflection loss of CFM-700 is −68.75 dB at 1.88 mm and the effective absorbing bandwidth could reach 4.72 GHz at only 1.55 mm. It is believed that this work paves an inspiring way to design conductively hierarchical magnetic carbon-based composites with excellent microwave absorption through construction of MOF-on-MOF hybrid structures.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Sustainability
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2025
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IF 7.9
Xinyuan Dong,Peng Xu,Lihua Gao,Xiao Han,Junhong Zhang,Zhijun He
An environmentally friendly and low-cost co-carbonization technology has been reported as an effective route for the preparation of carbon-based synfuel for sintering processes employed in the steel industry, in which loaded CaO catalysts promote the synergistic role between sawdust (SD) and bituminous coal (BC). In this work, a series of experiments were conducted to research the effects of the co-carbonization temperature, co-carbonization holding time and addition amount of CaO on synfuel. Finally, a co-carbonization temperature of 550 °C, a co-carbonization holding time of 30 min, and the added amount of CaO at 4 wt% were reasonable preparation conditions based on the biomass/coal of 4/6. According to the above experimental parameters, the solids yield, bulk density and heat value of SD/BC synfuel were 61.07%, 403 kg m −3 and 27.82 MJ kg −1 , respectively. These results showed that adding CaO increases the order and density of synfuel microcrystals. For the surface structure, the addition of CaO could improve the content of aromatic C C and C–O, whereas the content of carbonyl C O decreased in the carbonization process, which demonstrated that the addition of CaO could improve transformation of the graphite-like structure. Additionally, SD/BC synfuel loaded with CaO exhibited a rougher surface and larger pores compared to that without CaO loading, and the number of pores decreased because the formation of CaCO 3 coated the synfuel surface. The above indicators of carbon-based synfuel obtained from this study agree with the practical requirements of sintering operations. This work reveals the mechanism of biomass/coal and CaO interaction on the preparation of carbon-based synfuel.
研究领域:
能源科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
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2019
·Vol. 24
·期 10
·1881
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IF 3.06
Geng Zhao,Ming Liu,Xinkui Xia,Li Li,Bayin Xu
In this study, a carbon-based solid acid was created through the sulfonation of carbon obtained from the hydrothermal pretreatment of glucose. Additionally, ethyl levulinate, a viable liquid biofuel, was produced from furfuryl alcohol using the environmentally benign and low-cost catalyst in ethanol. Studies for optimizing the reaction conditions, such as reaction time, temperature, and catalyst loading, were performed. Under the optimal conditions, a maximum ethyl levulinate yield of 67.1% was obtained. The recovered catalyst activity (Ethyl levulinate yield 57.3%) remained high after being used four times, and it was easily regenerated with a simple sulfonation process. Moreover, the catalyst was characterized using FT-IR, XRD, SEM, elemental analysis, and acid-base titration techniques.Keywords:furfuryl alcohol;ethanol;ethyl levulinate;carbon-based solid acid
研究领域:
化学工程
·
可再生资源与环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
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2023
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IF 5.6
Shixiong Min,Zhe Meng,Yaoyao Zhao,Wenjing Li,Zhengguo Zhang,Fang Wang
Developing cost-effective and efficient hydrogen/oxygen evolution reaction (HER/OER) electrocatalysts that can work stably at industrial-level current densities is of paramount importance for the scalable implementation of water electrolysis. Herein, a monolithic chainmail electrode is fabricated by embedding self-phosphorized graphitic carbon-encapsulated Co2P nanoparticles within a hierarchically porous carbon membrane matrix (Co2P@CTF) via the direct carbonization of a Co2+-cross-coupled soybean protein framework. While formulating the soybean protein framework into a hierarchically porous, mechanically strong, and conductive carbon membrane, the endogenous N and P sources enable the heteroatom doping of the carbon matrix while simultaneously yielding graphitic carbon-encapsulated Co2P nanoparticles. Such an integrated Co2P@CTF monolithic electrode exhibits remarkable alkaline water splitting performance with low overpotentials of 177.5 and 388.4 mV at 100 mA cm−2 for the HER and OER, respectively, with excellent stability for the HER even at 1000 mA cm−2 over 100 h and for the OER at 100 mA cm−2 for >50 h. An electrolyzer assembled using Co2P@CTF requires a cell voltage of 1.69 V at 10 mA cm−2 with a high solar-to-hydrogen (STH) conversion efficiency of 16.8% when powered using a commercial silicon solar cell. This work opens a new avenue for scalable fabrication of monolithic chainmail electrodes with desirable functionalities for sustainable electrochemical energy conversion.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
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2025
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IF 6.4
Chongxi Zhang,Fengting Li,Dong Wu,Qingmeng Guo,Zhanning Liu,Zhikun Wang,Zixi Kang,Lili Fan,Daofeng Sun
Integration of cobalt phosphides (Co2P and CoP) in a carbon matrix shows great promise for developing high-performance catalysts for water electrolysis. Nevertheless, the controlled synthesis of these two phases with an effective interface, uniform dispersion, and a simplified synthesis process is still challenging. Herein, we proposed a strategy that involves pre-construction of the Co/CoO@C heterostructure followed by post-conversion by phosphorization to achieve the precise synthesis of the Co2P/CoP@C heterostructure, which was realized by utilizing a MOF as the self-sacrificial template. The oxygen-coordinated MOF that shows advantages in building the Co/CoO heterostructure was employed in this work and grown into a high-quality membrane via cathodic electrodeposition on the graphite substrate (Gss). The obtained catalyst (Gss-Co2P/CoP@C-800) requires 146 and 365 mV overpotentials to achieve a current density of 100 mA cm−2 for the HER and OER, respectively, and 1.54 V to achieve a current density of 10 mA cm−2 for water electrolysis. Beyond the significantly enhanced conductivity that originates from the robust interaction between the MOF and Gss, the establishment of an effective Co2P/CoP interface also plays a pivotal role in contributing to the high performance of Gss-Co2P/CoP@C-800. As revealed by density functional theory (DFT) calculations, the unique d-orbital electron distribution of Co2P/CoP and the enhanced state density near the Fermi level facilitate its efficient electron transport and render the Co2P/CoP heterostructure region a crucial active site for water electrolysis. This study will provide new insights into the rational design and construction of heterostructures based on MOFs for efficient and green energy conversions.
研究领域:
材料科学
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电化学
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催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2016
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IF 2.848
Jia-liang Lv,Qing-da An,Wei Zheng,Yuan Fan,Zhi-min Lei,Shang-ru Zhai
There is an interesting yet challenging task to develop a facile procedure for designing multifunctional carbonaceous materials for environmental applications. In this research, multifunctional hierarchical cabbage-like carbonaceous materials (Fe/CCMs-X) have been fabricated via a facile hydrothermal carbonization (HTC) of furfural in the presence of cobalt acetylacetonate, followed by simple impregnation iron salts and heating treatment. The structure, morphology and magnetic properties were characterized by powder X-ray diffraction (XRD), N 2 adsorption-desorption isotherms, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM) techniques; and its adsorption behaviors of Cr(VI) were investigated in detail. Batch experiments were conducted at relatively mild conditions (pH ∼ 3). The adsorption equilibrium data was best fitted by Langmuir isotherm model and the adsorption kinetics followed pseudo-second-order models. The maximum capacity predicted by the Langmuir model is 75.3 mg/g for Fe/CCMs-800. Furthermore, thermodynamic parameters (Δ H > 0, Δ S > 0, and Δ G < 0) revealed that the sorption reaction was a spontaneous and endothermic process. Most of important, the excellent magnetism (79.9 emu g −1 ) provided an ideal magnetic-separation performance from aqueous systems. It demonstrated that this newly prepared multifunctional hierarchical carbonaceous materials (Fe/CCMs-X) are promising sorbents for chromium(VI) ions removal from water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2023
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IF 3.6
Danqiang Huang,Jianfeng Dai,Zengpeng Li,Xinchao Wen,Wei Feng,Hui Liu
Hollow ZnFe 2 O 4 /carbon-based nanocomposite absorbers were successfully synthesized using a simple one-pot solvothermal process. Different methods were used to study the physical structure, microstructure, functional groups, and magnetic properties of the composite absorbers. The addition of different carbon-based nanomaterials improves the wave absorption properties in different ways. It not only improves the absorption strength, but also increases the effective absorption bandwidth. According to research findings, a maximum reflection loss of − 37.47 dB was obtained for pure hollow ZnFe 2 O 4 at 1.6 mm, −49.17 dB for ZnFe 2 O 4 /rGO at 3.6 mm, −40.31 dB for ZnFe 2 O 4 /MWCNTs at 4.8 mm, and − 27.64 dB for ZnFe 2 O 4 /MWCNTs/rGO at 1.9 mm. The excellent electromagnetic wave absorption is attributed not only to the magnetic loss of the ferrite and the dielectric loss of the carbon-based nanomaterials, but also to the interfacial polarization between the different materials and the dipolar polarization of the residual functional groups.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
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2024
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IF 8.3
Yuqian He,Linlin Yan,Mi Zhou,Kai Wang,Yingjie Zhang,Enrico Drioli,Jun Ma,Xi Quan Cheng
Interface solar-driven evaporators capture sunlight and concentration of heat at the vapor-liquid interface to efficiently evaporate water. However, challenges remain in the preparation of evaporators with a high evaporation rate and efficiency of photothermal conversion. Herein, an advanced carbon-based aerogel evaporator was designed by carboxylated multiwalled carbon nanotubes (MWCNTs-COOH) and cellulose nanofiber (CNF) entangling with each other as a backbone and in-situ polymerized polypyrrole (PPy) to constitute three-dimensional (3D) porous structure for highly efficient photothermal desalination and wastewater purification. The combination of MWCNTs-COOH with PPy reduces the energy gap (0.91 eV), endowing the aerogel with excellent photothermal conversion properties. The porous MWCNTs-COOH/PPy/CNF(CPCA) aerogel possesses an extremely low density of 0.048 g m −3 and excellent water transport capability, which exhibited a high water evaporation rate (2.48 kg m −2 h −1 ) and superior energy efficiency (90.2 %) under one sunlight intensity. The designed water evaporator can be stably and continuously applied in desalination and wastewater purification, and it is expected to be used for water purification to alleviate the worldwide water challenge.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
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2024
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IF 3.9
Tao Lv,Kexin Wei,Ting Wang,Xiao Wang,Zuguang Liu
A carbon-based acid was prepared by the sulfonation of activated carbon derived from eucalyptus wood waste, a solid waste from wood processing, and characterized by SEM, BET, FT-IR, Raman, XRD and XPS. Due to activation by phosphoric acid and subsequent sulfonation, the resultant carbon-based solid acid can obtain a porous structure, medium surface area and abundant functional groups including sulfonic groups, carboxyl, hydroxyl and other oxygen-containing groups, which provides excellent mass transfer channels and sufficient reactive sites for catalytic reactions. So, the carbon-based solid acid showed excellent catalytic performance for converting α -pinene to camphene with a conversion of up to 99.8 % and a selectivity of 51.2 %, respectively. Quantum chemical theoretical calculations (electrostatic potential, Gibbs free enthalpy of intermediates, molecular size) are used to further analyze the catalytic mechanism of carbon-based solid acids. Theoretical analysis of the carbon positive ions and their energies as well as experimental results under electron-donating co-catalysts suggests that oxygen-containing functional groups on carbon-based solid acids play an important role in improving α- pinene adsorption onto catalyst as well as camphene selectivity. This work provides a promising approach for converting α -pinene to camphene catalyzed by carbon-based solid catalyst.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Cong Wang,Jieying Xiu,Kunxi Lü,Yafeng Li,Mingdeng Wei
Na super-ion conductor type material Na 3 V 2 (PO 4 ) 3 has been widely researched as the cathode of sodium-ion batteries (SIBs) in recent years, but the unsatisfying cost of Na 3 V 2 (PO 4 ) 3 impedes its wide application in SIBs. In this study, iron element is used to replace part of vanadium in Na 3 V 2 (PO 4 ) 3 to reduce its expense, and pine pollen is applied for the first time as a very effective carbon source to improve the performance of Na 4 FeV(PO 4 ) 3 . The fabricated composite material achieves a capacity of 105 mA h g −1 under 0.2 C and fascinating cycling stability over 94 % under 2 C for 500 cycles and 98 % under 10 C for 1000 cycles. The excellent cycle performance is caused by the involvement of pine pollen that acts as a carbon matrix to enhance the electron conductivity and block the agglomeration of active material effectively, thus the well-dispersed nano sized Na 4 FeV(PO 4 ) 3 shortens the diffusion path of sodium ion and gains a remarkable rate capability. Moreover, the distinguished reversibility during the charge and discharge procedures is ascribed also to the robust structure of Na 4 FeV(PO 4 ) 3 . This work provides an efficient route to realize the economic cathode material of SIBs with good performance.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 3
·1473-1481
·
IF 2.961
Huang Xiaona,Ren Yaqi,Long Jianping,Lin Jinhui,Zhou Zheng
The interface between carbon matrix and sulfur (S) is critically essential for the exhaustive conversion of S to lithium sulfide (Li 2 S). However, the struggling diffusion of lithium (Li) ions on the surface of carbon allows severe polarization of Li ions and shuttling of polysulfides. Herein, we demonstrate an effective strategy via decreasing the diffusion barrier of Li ions on the conductive carbon matrix surface via embedding Fe and N atoms within the carbon matrix. As combined with 80% sulfur content, the proposed interfaces exhibit an excellent increment in both of specific capacity and stability cycles. The promoted mechanism at the proposed interface is clearly evaluated by density functional theory (DFT) calculation, cyclic voltammograms (CV) curve, and AC impedance. This research offers a novel inspires to design fast conversion of high content S cathode via promoting the Li-ion diffusion within the cathode.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Yang Huang,Xuening Song,Jun Deng,Chenyang Zha,Wenjing Huang,Yunling Wu,Yanguang Li
Transition metal phosphides are arguably the most promising non-precious metal-based materials for hydrogen evolution reaction (HER). Unfortunately, their high preparation temperature usually results in particle sintering. It is challenging to achieve the ultra-dispersion of transition metal phosphide nanoparticles on conductive supports so as to enlarge their surface areas and reinforce their physical stability. In this study, we prepare fine MoP nanoparticles uniformly dispersed on hierarchical carbonaceous scaffolds by using strongly interacting Mo, P and C precursors. The resultant hybrid product possesses a three-dimensional open structure that allows a large fraction of MoP nanoparticles electrochemically accessible and suppresses their possible agglomeration during extended electrocatalysis. Electrochemical measurements show that the product has an impressive HER activity, only requiring an overpotential of 120 and 170 mV to achieve 10 mA/cm 2 in 0.5 M H 2 SO 4 and 1M KOH, respectively, as well as great cycling stability. Its performance can be further promoted via the controlled sulfur doping at surface to form molybdenum phosphosulfide, which reduces the overpotential at j = 10 mA/cm 2 to 92 mV and 158 mV for acidic and alkaline HER.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）