JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Pengfei Yin,Yuting Tang,Limin Zhang,Sihan Liu,Jian Wang,Yi Zhang,Xiyuan Sun,Zhihua Gao,Haipeng Hu,Yongpeng Zhao
Preparation of microwave absorption materials is one of the most effective way to solve hazards of excessive microwave radiation at current stage. Herein, a series of pyramid-like carbon frameworks embedded with Co 3 Fe 7 and CoFe 2 O 4 phases have been synthesized via a solvent-controlled strategy in solvothermal-annealing process. The solvent ratio of DMF and DW has great impact on the morphology and electromagnetic wave dissipation properties of such composites. The composite can reach the maximal RL of −24.66 dB at 7.68 GHz and the optimal EAB of 6.3 GHz for only 2.62 mm, this realization of wider EAB at thin thickness is due to the synergic effect of dielectric polarization, magnetic resonance, structural damping and so on. Most important of all, the wide range of appropriate impedance matching in as-prepared composite is the first premise. The broad EAB of composite prepared here reveals its prospect for actual application in protection of microwave radiation.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Zhi-Hao Zhao,Xu-Dong Hu,Hongqiang Wang,Meng-Yang Ye,Zhi-Yuan Sang,Hui-Ming Ji,Xiao-Lei Li,Yejing Dai
Rational design of electrode materials for sodium-ion batteries with high flexibility is still challenging. Here, superelastic 3D few-layer MoS 2 /carbon framework heterogeneous electrodes (abbreviated as, MoS 2 @C F ) are fabricated by a simple vacuum infiltration and heating process. The interconnected ultrathin MoS 2 network filled with carbon framework forms a 3D heterogeneous network with hierarchical pore structure . The unique structure of the electrodes results in excellent mechanical and electrochemical performances. The MoS 2 @C F electrodes exhibit superior elasticity and recoverability. After 180° bending repeatedly, the electrodes still can recover their initial sizes. Moreover, the electrodes show outstanding cycling stabilities with high reversible capacities reaching up 240 mA h g −1 after 500 cycles at 1 A g −1 (capacity retention of ~ 99%). Full-cells assembled with MoS 2 @C F anodes and Na 3 V 2 (PO 4 ) 3 cathodes show high reversible capacity (~ 252 mA h g −1 at 0.5 A g −1 ). Overall, the superior mechanical properties and high electrochemical performances indicate the promising potential of MoS 2 @C F electrodes in large-scale flexible sodium-ion storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Yuanfeng Wei,Jing Zhao,Weijian Yang,Zhiyuan Qiu,Yufen Xia,Zhimin Wang,Yuxin Li,Chengbin Liu
Arsenic contamination of groundwater harms the health of millions of people, especially As(III), which is extremely toxic and difficult to remediate. Herein, we fabricated a reliable La-Ce binary oxide-anchored carbon framework foam (La-Ce/CFF) adsorbent for As(III) deep removal. Its open 3D macroporous structure ensures fast adsorption kinetic. The incorporation of an appropriate amount of La could enhance the affinity of La-Ce/CFF for As(III). The adsorption capacity of La-Ce 10 /CFF reached 40.01 mg/g. It could purify the As(III) concentrations to drinking standard level (< 10 μg/L) over the pH ranges 3–10. It also possessed excellent anti-interference ability to the interfering ions. In addition, it worked reliably in the simulated As(III)-contaminated groundwater and river water. La-Ce 10 /CFF could easily apply in fixed-bed, and La-Ce 10 /CFF (1 g) packed column could purify 4580 BV (36.0 L) of As(III)-contaminated groundwater. When further considering the excellent reusability of La-Ce 10 /CFF, it is a promising and reliable adsorbent for As(III) deep remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 6
·1941-1949
·
IF 6.177
Yunhong Pi,Xiuting Wu,Zefeng Zheng,Liang Ma,Tiejun Wang
Methanol reforming in aqueous solution provides a significantly attractive and promising pathway to release hydrogen with mild H2 release conditions and high H2 storage capacity. Exploring non-noble metal-based catalysts with sufficiently high activity, stability, and selectivity for H2 remains a great challenge. We report here the construction of a chitosan–lignin (CS–LN) carbon framework bio-composite-encapsulated Cu catalyst (Cu@CS–LN) with high loading and dispersion for base-free hydrogen generation from aqueous-phase methanol reforming below 210 °C. With optimized conditions, the hydrogen generation rate of Cu@CS–LN (2.5 × 105 μmolH2 gCu−1 h−1) represents an approximately 2-fold enhancement compared with Cu@CS without lignin incorporation, and more than 3–5 times higher than commercial Cu-based catalysts such as Rainie Cu or CuO/ZnO. The catalyst underwent an intensified water gas shift reaction (WGSR), and it also exhibited extraordinary selectivity toward the CO byproduct. The unique carbon framework structure of CS–LN through electrostatic densification self-assembly not only enhanced the adsorption and dispersion of Cu species, but it also stabilized and further reduced the Cu particles to active phase Cu during the hydrogen generation reaction to promote catalytic activity and stability without obvious catalyst deactivation detected after running for 150 hours. This specific hydrogen production technology exhibits great potential for hydrogen-powered polymer electrolyte membrane (PEMFCs) fuel cells.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Peng Zhou,Liang Pang,Yang Li,Huachan Fang,Peng Xiao,Feixiang Wu
The fabrication of three-dimensional (3D) honeycomb carbon frameworks, incorporating embedded silicon (Si) nanoparticles (NPs), is successfully achieved through a facile method involving mixing, carbonization , and acid pickling. The as-prepared Si@PVPC composites exhibit excellent electrochemical performances due to reasons as follows. (1) Honeycomb channels supply enough space to accommodate the expansion of Si NPs and so structural integrity of 3D honeycomb carbon frameworks are maintained during lithiation/delithiation processes. (2) Honeycomb channels offers fast transfer paths for Li-ion diffusion. (3) 3D carbon frameworks afford reliable and stable electric contact points. As a result, Si@PVPC electrodes show a capacity of 1294.3 mAh g −1 at 2 A g −1 after 1400 cycles with a capacity retention of 85.5 %. Even at an ultrahigh current of 16 A g −1 , Si@PVPC electrodes still show a capacity of 619.6 mAh g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 51
·2005779
·
IF 16.836
Guang-Yao Zhai,Dong Xu,Shi-Nan Zhang,Zhong-Hua Xue,Hui Su,Qiu-Ying Yu,Hong-Hui Wang,Xiu Lin,Yun-Xiao Lin,Lu-Han Sun,Xin-Hao Li,Jie-Sheng Chen
Doping the host materials with either electron-rich heteroatoms or electron-deficient heteroatoms have been applied as a straightforward and main-stream method to modify the electronic structures and boost the electrochemical activity for various reactions, including nitrogen reduction reactions (NRR). As the third type of dopants, isoelectric heteroatoms (exemplified with Si atoms in carbon framework in this work) have been designed as highly efficient active centers for NRR. As the same group element with a different size and electronegativity to carbon support, the isoelectric Si heteroatom (Iso-e Si) creates localized singularities with a lone orbital that can act as an electron trap for pre-adsorbed N 2 molecules through coulomb interaction and thus facilitates the following activation process for NRR. Iso-e Si atom thus functions as a special type of metal-free single atom-based electrocatalyst to largely boost the faradaic efficiency of pristine carbon support for NRR by a factor of 12, giving a remarkably high turnover frequency value of 0.52 h −1 , comparable to atomically dispersed transition metal-based electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Zehui Li,Yi Yuan,Hao Wu,Xinghui Li,Menglei Yuan,Huaizhang Wang,Xiaoxue Wu,Shuai Liu,Xianming Zheng,Mingjun Kim,Haoyun Zheng,Sadia Rehman,Guangya Jiang,Wangyang Fu,Jingkun Jiang
Carbon frameworks (CFs) derived from metal-organic frameworks (MOFs) have been produced as adsorbents of toluene. To further obtain optimum hierarchical porous carbon structure of CFs, different treatment temperatures were applied to a typical kind of MOFs (ZIF-8). The adsorption capacity of the toluene of hierarchical porous CFs obtained from ZIF-8 under 1100 °C (CF-1100, adsorption capacity of 208.5 mg/g) was higher than that of other carbonization temperature and MOFs. Impressively, the adsorbent CF-1100 also exhibited strong hydrophobicity , low desorption temperature, and good selectivity to toluene. The adsorption capacity decreased by only 10.4% under wet condition compared with the dry condition, standing on the top of the recently reported adsorbents. The impressive adsorption performance of CF-1100 is attributed to the larger specific surface area (1024 m 2 /g) and pore volume (0.497 cm 3 /g), newly generated micropores (pore width is 0.6–0.8 nm) and mesopores (pore width above 10 nm), and carbonaceous structure with higher degree of graphitization . Based on the adequate adsorption performance, CF-1100 coated quartz crystal microbalances as sensor also showed a high sensitivity of 0.4004 Hz/ppm and small relative standard deviations of 1.0745% for toluene sensing. This contribution provides a foundation for optimizing potential adsorbents and sensing materials for air pollution abatement.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Qiuyan Jin,Bowen Ren,Dongqi Li,Hao Cui,Chengxin Wang
The utilization of a highly active and robust bifunctional catalyst for simultaneously producing H2 and O2 is still a major challenging issue, which is vital for improving the efficiency of overall water splitting. Herein, we employ a novel plasma-assisted strategy to rapidly and conveniently synthesize the three-dimensional (3D) porous composite nanosheets assembled on monodispersed Co nanoparticles encapsulated in a carbon framework (CoNPs@C) on a carbon cloth. Such a novel 3D hierarchical porous nanosheet improves the exposure and accessibility of active sites as well as ensures high electroconductibility. Moreover, the coating of a few graphene layers on the surface of catalysts favors improvement of the catalytic activity. Benefited from these multiple merits, the CoNPs@C composite nanosheets enable a low overpotential of 153 mV at −10 mA cm–2 for hydrogen evolution reaction. Furthermore, they are also capable of catalyzing the oxygen evolution reaction with high efficiency to achieve current density of 10 mA cm–2 at the overpotential of 270 mV. Remarkably, when assembled as an alkaline water electrolyzer, the bifunctional CoNPs@C composite nanosheets can afford a water-splitting current density of 10 mA cm–2 at a cell voltage of 1.65 V.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Shuangyu Wang,Zhiwei Hu,Zhongmou Pan,Dewei Wang
The construction of heteroatom-doped hierarchical carbon frameworks has attracted significant research attention as high-performance electrode materials for supercapacitors. Herein, a facile one-step Mohr’s salt-assisted KOH activation strategy has been developed for the production of S-doped hierarchical carbon frameworks with large specific surface area from sustainable spruce bark. We found Mohr’s salt plays multiple roles during the synthesizing process by simultaneously acting as an S source, the template to generate mesopores, and the co-activator beyond KOH. As the electrode for supercapacitors, the high specific capacitance of 281 and 156 F g −1 can be achieved in aqueous electrolyte and ionic liquid electrolyte at 1 A g −1 , respectively. More importantly, the electrode also displays excellent rate capability where a high capacitance can be maintained at large charge-discharge operation. Moreover, the supercapacitor device also demonstrated an energy density is high up to 66.26 Wh kg −1 at the power density of 875 W kg −1 in ionic liquid electrolyte. These results acquired could offer a versatile way to convert renewable biomass into value-add porous carbon for electrochemical energy-storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 25
·2400396
·
IF 27.4
Jingwen Ba,Hongliang Dong,Mateusz Odziomek,Feili Lai,Rui Wang,Yandong Han,Jinfu Shu,Markus Antonietti,Tianxi Liu,Wensheng Yang,Zhihong Tian
The oligomers of carbon suboxide, known as red carbon, exhibit a highly conjugated structure and semiconducting properties. Upon mild heat treatment, it transforms into a carbonaceous framework rich in oxygen surface terminations, called oxocarbon. In this study, the abundant oxygen functionalities are harnessed as anchors to create oxocarbon-supported nanohybrid electrocatalysts. Starting with single atomic Cu (II) strongly coordinated to oxygen atoms on red carbon, the Fehling reaction leads to the formation of Cu 2 O clusters. Simultaneously, a covalent oxocarbon framework emerges via cross-linking, providing robust support for Cu 2 O clusters. Notably, the oxocarbon support effectively stabilizes Cu 2 O clusters of very small size, ensuring their high durability in acidic conditions and the presence of ammonia. The synthesized material exhibits a superior electrocatalytic activity for nitrate reduction under acidic electrolyte conditions, with a high yield rate of ammonium (NH 4 + ) at 3.31 mmol h −1 mg cat −1 and a Faradaic efficiency of 92.5% at a potential of −0.4 V (vs RHE).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Qian Liu,Liying Wang,Guohua Chen,Gaoqi Wu,Jingjing Wang,Zhiwei Liu,Zhenzhu Cao,Yongfeng Zhang
Transition metal sulphides and oxides have been identified as potential cathode materials for lithium-ion batteries with high initial capacity and high selectivity. Nevertheless, the low ground conductivity and volume expansion have constituted significant obstacles to the advancement of this field of study. In this study, the heterostructure CoMn₂O₄/MnS₂@C1-2-2 of MnS₂ and CoMn₂O₄ was obtained through high-temperature (Ar. 450 °C) calcination of a novel red single crystal [CoMn(TDC)] n precursor. The resulting structure exhibited excellent lithium-ion transport properties. The biphasic heterostructure with a porous carbon framework is capable of forming a multitude of phase interfaces and conductive pathways, which facilitate charge migration, enhance conductivity, and expand the contact area with the electrolyte, thereby augmenting the charge transfer capability. The CoMn 2 O 4 MnS 2 @C1-2-2 composite displays remarkable lithium storage capabilities, with a specific capacity of 689 mA h g −1 even after 400 cycles at 0.5 A g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wei He,Hang Luo,Peng Jing,Hongmei Wang,Changhaoyue Xu,Hao Wu,Qian Wang,Yun Zhang
Silicon (Si) is regarded as a promising anode material for lithium-ion batteries because of its ultrahigh theoretical specific capacity, appropriate potential, and abundant resources. However, its inherent insulation and large volume changes lead to inferior electrochemical activity and unsatisfactory cycling stability, thus limiting its practical applications. In this study, a grape stem-derived porous carbon framework (PCF) with slender through-holes in the interior and a large number of micropores on the carbon walls was prepared via a facile approach and employed as the Si matrix. The continuous through-holes and well-distributed oxygen-containing functional groups of the PCF provided the Si nanoparticles with sufficient space to accommodate volumetric expansion and abundant active sites for adsorption. Additionally, the porous structure and high conductivity of the PCF facilitated electrolyte penetration and electron transfer . Therefore, the PCF/Si composite exhibited a decent discharge capacity (1006 mA h g −1 at 0.2 A g −1 ) and robust cycling stability (891 mAh g −1 remaining after 400 cycles).
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）