RSC Advances
·
2025
·Vol. 15
·期 15
·11441-11450
·
IF 4.6
Junaid Khan,Anique Ahmed,Abdullah A. Al-Kahtani
In this work, to address the issue of poor conductivity in COFs, a layered porous composite (EG@COF) was successfully synthesized. A redox-active COF (DAAQ-TFP COF) was grown on the surface of expanded graphite (EG) through a solvent-free in situ synthesis. SEM analysis displayed that the obtained composite (EG@COF) possessed a layered porous structure. Further investigations revealed that EG not only improved electrical conductivity but also regulated the pore size of the COFs. This structure was highly conducive to enhancing the specific capacitance of the electrode material. An electrochemical study demonstrated that the specific capacitance of EG@COF-3 reached 351 C g−1 at 1 A g−1, with 94.4% capacitance retention after 10 000 cycles. The excellent capacitance retention was attributed to the stable backbone of the COF. Meanwhile, an asymmetric supercapacitor (ACS) comprising activated carbon (AC) and EG@COF exhibited an energy density of 16.4 W h kg−1 at a power density of 806.0 W kg−1.
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
Coatings
·
2024
·Vol. 14
·期 9
·1098
·
IF 2.9
Xu Cui,Mengying Guo,Sensen Han,Shuangshan Li,Yin Yu,Yanxi Zhang,Qingshi Meng
Porous composites possess distinctive structural features and performance advantages, making them promising for applications in various domains such as sensing, energy storage, and acoustics. A simple, efficient, and environmentally friendly method was employed to prepare porous polyurea materials, which were then modified with graphene nanosheets. The resulting graphene/polyurea porous composites demonstrated enhanced mechanical properties, with a 35.04% increase in tensile strength at a graphene content of 5 wt%. These composites exhibited exceptional multifunctionality, achieving a specific capacitance of 35.74 F/g when used as capacitor electrodes. Additionally, they displayed high sensitivity to resistance and capacitance changes under various mechanical loads, such as tensile, torsional, and bending stresses, with a resistance change rate of 57.72% under 180-degree torsion, highlighting their potential as resistive and capacitive sensors. Compared to traditional materials, the multifunctional composites maintained a resistance change rate below 40% and a capacitance retention rate above 95.07% after 10,000 cycles, underscoring their durability and reliability. Moreover, the developed graphene/polyurea porous composites exhibited good corrosion resistance and an impressive sound absorption rate of 30.68% for high-decibel noise, reducing environmental limitations for their applications. These properties position the composite as a durable, high-sensitivity, multifunctional material with significant potential in sensing, energy storage, and noise reduction applications.
研究领域:
材料科学
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能源技术
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传感器技术
·
声学工程
✓ 已验证
产品关联
DOI
高影响因子
Friction
·
2024
·
IF 6.3
Guo Yuyan,Liu Peng,Zhang Wenhao,Guo Zhiguang,Liu Weimin
Oil pollution and the energy crisis make oil-water separation an urgent for human need. The widespread use of materials with a single emulsion separation capability is limited. Multifunctional on-demand separation materials can adapt to a wide range of application scenarios, thus having a wider range of applications. The underoil superhydrophilic surface is of great significance for realizing the on-demand separation of oil/water emulsions through the removal of water in the oil and oil in the water. A 3D porous emulsion separation material based on the superhydrophilic principle of sphagnum moss was designed. The material was prepared in a simple step by taking advantage of the adhesion of polydopamine and the introduction of the as-prepared superhydrophilic BaSO 4 nanoparticles to achieve superhydrophilicity with a water contact angle (WCA) of 0° and an oil contact angle (OCA) of 157.3°, resulting in excellent separation performance for both water-in-oil and oil-in-water emulsions. Underoil superhydrophilic porous composite (OSPC) can complete two kinds of emulsion separations by filtration or adsorption. It adsorbs water from water-in-oil emulsion to achieve separation, with a good adsorption capacity of 74.38 g/g and efficiency up to 99%. It can also filter oil-in-water emulsions with an efficiency of 99.92%. The separation efficiencies are all almost unchanged after ten separation cycles. Furthermore, the material has excellent flame retardancy, which reduces the possibility of secondary disasters. The three-dimensional porous sponge has excellent on-demand separation performance for multiple emulsions. It provides a new preparation strategy for underoil superhydrophilic materials and a new idea for the design direction of special wetting materials for the on-demand separation of oil/water emulsions.
研究领域:
材料科学
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环境科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
·
2022
·
IF 3.027
Hua Jiao,Jiechen Jin,Kang Zhao,Xue R Zhou,Xinyuan Zhang,Sen Song,Jia Wang,Yufei Tang,Guodong Cui
Barium titanate (BaTiO3) is a typical perovskite-type oxide with high dielectric constant, low dielectric loss, and excellent ferroelectric, piezoelectric, pyroelectric, and other properties. In view of the low photogenerated electron-hole separation efficiency of T-BT itself, it is proposed to prepare nanocomposites with good catalytic performance by compound modification with Ag. Considering repeated use, on the basis of powder catalysis, a porous block is prepared by compounding powder and organic polymer PVDF. In this study, the t-BaTiO3/Ag/β-PVDF composite material with porosity of ∼70.4% was prepared with the raw material of PVDF and piezoelectric t-BaTiO3/Ag. The mechanical and piezoelectric photocatalytic properties of the composite material was studied systematically. The piezoelectric coefficient d33 is 1.44 pC/N which can be explained by COMSOL simulation calculation. Moreover, the compressive strength is 1.76 MPa. The degradation MO and RhB results indicated that t-BaTiO3/Ag/β-PVDF composite material had good degradation and cycle stability.
研究领域:
材料科学
·
催化化学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zekai Miao,Jianjun Wu,Yanjie Niu,Zhenkun Guo,Fanhui Guo,Yixin Zhang
A novel type hierarchical porous composite is successfully synthesized through chemical activation followed by the hydrothermal treatment using coal gasification fine slag (FS) as the raw material. This study realized pore structure development for the porous composite through taking the advantage of slag particles to achieve further better CO 2 adsorption capacity. The hierarchical porous carbon (FSHPC) prepared from FS by chemical activation has obvious macropore structure. After being treated by hydrothermal synthesis method, FSHPC formed a well-developed pore structure and the surface area increased by 735 m 2 /g. Among (1–16)-FSHPC-NM samples, 4- FSHPC -NM sample has the largest surface area of 1713 m 2 /g, higher than that of porous carbon whose mineral matter is almost entirely removed (1524 m 2 /g). The mechanisms for the enhancement of pore structure by hydrothermal treatment are: (1) the decrease of the content of slag particles (SP) which acted as a ballast and blocked the pore of FSHPC; (2) the silicate/aluminosilicate film covering the meso-/macro-pores surface and the pores transformed into micro-/ meso -pore. The FSHPC-NM samples showed remarkable CO 2 adsorption performance. The 4-FSHPC-NM sample exhibits the highest CO 2 uptake of 2.97 mol/kg and 1.23 mol/kg at 25 °C and 50 °C, respectively. Compared with the CO 2 adsorption capacity of FSHPC, the CO 2 adsorption capacity increased by 1.03 mol/kg after hydrothermal treatment, due to the developed pore structure and more active sites (metallic cations) for CO 2 adsorption. 4-FSHPC-NM sample has the best CO 2 adsorption rate, whose CO 2 adsorption equilibrium is achieved within 5 min. CO 2 uptake of the 4-FSHPC-NM sample was well maintained after 15 cycles. All these results suggest that hierarchical porous composite has an enormous potential to be reused for practical and industrial CO 2 adsorption applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zekai Miao,Xinran Han,Hao Ge,Rui Wu,Congchao Zhang,Hai Zhu,Shengping Wang
Coal gasification fine slag (FS), as a by-product of coal gasification process, contains residual carbon (RC) and slag particles (SP). The two components can be used as raw materials to prepare porous materials. Whereas, during simultaneous utilization of RC and SP, their synergistic mechanism remains unclear. The research on the mechanism is beneficial for synthesis of the high performance CO 2 adsorbent. Herein, FS was treated by chemical activation followed by hydrothermal treatment to prepare porous composite material (FS-25-HA-HT) which had high surface area of 2194 m 2 /g and pore volume of 2.095 cm 3 /g. After chemical activation, the SP could be completely dissolved in alkali solution within around 20 min. The adsorption of porous carbon in alkali solution and strong electrostatic attraction from oxygen groups with the Si, Al-containing groups led to the increase of the concentration of Si (9825 ppm) and Al (2986 ppm) in subnatant during hydrothermal treatment. Thus, the aluminosilicate could deposit on the surface of porous carbon and pile up to form new crystal layer, which could increase the surface area and the CO 2 adsorption capacity. The adsorbent met both high uptake (5.32 mmol/g at 0 °C) and fast adsorption kinetics (adsorption equilibrium time of 3 min.). The clarification of synergism during simultaneous utilization of RC and SP offers new routes to prepare high performance adsorbent.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Cuiping Zhu,Mingmei Jing,Zhenjie Guo,Xiaojin Shi,Yang Hu,Zhuohong Yang,Zhuangzhuang Chu
Based on the amino-functionalized corn straw cellulose-based porous material, a structurally stable and high-performance straw-based metal catalyst (PPCS@Ni) was prepared by depositing metal particles on the surface of porous straw (PCS) using an economical and environmentally friendly polymer-assisted metal deposition (PAMD) method. Due to the excellent structural stability of the metal material and the catalytic performance of nickel, PPCS@Ni exhibited outstanding catalytic efficiency, cyclic regeneration ability, and stability in the catalytic hydrogenation of oleic acid. Furthermore, after experimental screening and optimization (8 g oleic acid, 34.73 % Ni, 100 mg PPCS@Ni, 180 °C, 3 MPa H 2 , 6 h), PPCS@Ni demonstrated a yield and selectivity for stearic acid reaching 100 %. Finally, density functional theory calculations revealed the mechanism of PPCS@Ni in the hydrogenation reaction of oleic acid as well as elucidated the key role of the catalyst surface and selectivity trend of products. With these advantages, it is anticipated that the straw-based metal catalysts developed in this study will provide a new effective pathway for vegetable oil hydrogenation processes.
研究领域:
催化材料
·
化学工程
·
可再生资源利用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2021
·
IF 6.609
Zekai Miao,Zhenkun Guo,Guofeng Qiu,Wenke Jia,Keran Jiao,Yixin Zhang,Jianjun Wu
Coal gasification fine slag (FS), classified as an industrial solid waste, is composed of residual carbon (RC) and slag particles (SP). The simultaneous utilization of RC and SP to prepare hierarchical porous composite (HTC) could realize the value-added utilization of FS. The role of SP in FS on HTC preparation is extremely vital and worthy of study. In this paper, FS was successfully used to synthesize HTCs for CO 2 adsorption. Orthogonal experiment was conducted to study the effect of SP on the properties of the synthesized HTCs. The changes of impregnation conditions could be effective for developing pore structure of HTCs and the surface area increased by 226 m 2 /g. Furthermore, the role of SP in FS on HTCs preparation was analyzed. After chemical activation, there was generation of many new pores in SP that the surface area and pore volume could reach 302 m 2 /g and 0.271 cm 3 /g. Besides, the leached metallic elements in the process of KOH impregnation could affect the mesopore development. The HTCs also proved to be attractive for CO 2 capture. The highest CO 2 adsorption capacity of 2.35 mmol/g at 25 °C was achieved with 5-PH-FSHCT sample. It also exhibited good selectivity of CO 2 over N 2 of 9.5. Furthermore, the sample had not only fast adsorption kinetics that it reached saturation levels in about 1.5 min, but also excellent regeneration efficiency 97% after ten cycles. All results suggest that FS has a great potential to be reused as a high performance adsorbent for practical and industrial CO 2 adsorption applications.
研究领域:
能源与环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 41
·23711-23717
·
IF 3.049
Shu-Hui Huo,Chen-Xu Liu,Peng-Xin Zhou,Jing Yu,Lei Bai,Zhen-Gang Han,Xiao-Quan Lu
Development of novel porous materials for efficient adsorption and removal of environmental pollutants from aqueous solution is of great importance and interest in environmental science and chemistry. Herein, we reported a facile synthesis of recyclable magnetic carbonaceous porous composite derived from iron-based metal–organic framework MIL-100(Fe) for superior adsorption and removal of malachite green (MG) from aqueous solution. Because of large surface area and high porosity, the synthesized magnetic carbonaceous porous material presented a superior adsorption capacity of 2090 mg g−1 for MG. The adsorption of MG on magnetic carbonaceous porous composite is endothermic and spontaneous. The prepared magnetic carbonaceous porous composite could be separated easily and rapidly from the solution matrix by an external magnet. The rapid adsorption, large adsorption capacity and good reusability make it attractive for practical use in the adsorption and removal of dyes from aqueous solutions.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Fei Wang,Wenlong Zhang,Haihui Zhou,Hong Chen,Zhongyuan Huang,Zhanheng Yan,Rujia Jiang,Chuqing Wang,Zhong Tan,Yafei Kuang
Pyrite (FeS 2 ) is considered to be one of the most promising anode materials for sodium ion batteries (SIBs) due to its high theoretical capacity, natural abundance, low cost and low toxicity, but the commercial process of FeS 2 is always limited by its low conductivity and volume expansion during the charge-discharge process. Herein, a three-dimensional porous composite (FeS 2 -C/RG) is constructed using FeS 2 -C nanoparticles and reduced graphene oxide through one-step vulcanization of PB (Prussian blue)/GO (graphene oxide) gel. As the anode material of SIBs, FeS 2 -C/RG exhibits high electrochemical performance benefiting from the unique three dimensional structure and small FeS 2 -C nanoparticles. The initial specific capacity can reach 1196 mAh g −1 at 0.1 A g −1 and it can still remain 543.0 mAh g −1 after 100 cycles at 0.5 A g −1 . Even at 6 A g −1 , the capacity could maintain 291.7 mAh g −1 after 1000 cycles. The excellent rate and cycling performance of FeS 2 -C/RG indicate it is a promising anode material for rechargeable SIBs.
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
CHINESE JOURNAL OF POLYMER SCIENCE
·
2019
·Vol. 38
·期 6
·638-643
·
IF 2.804
Yang Xuan-He,Yao Yan-Qing,Huang Mu-Hua,Chai Chun-Peng
A bulk Poly(vinyl alcohol)/ZIF-8 (PVA/ZIF-8) porous composite with aligned porous structure was prepared by ice-templating method. The microstructure of PVA/ZIF-8 porous composites was characterized by scanning electron microscopy (SEM). The results showed that the composites had regular pore structure and ZIF-8 nanoparticles were evenly distributed on the skeleton of PVA. X-ray diffraction (XRD) test results showed that the crystalline structure of ZIF-8 was well preserved in the composites. The specific surface area of the composite was characterized by nitrogen adsorption/desorption test. The specific surface area of the composite was up to 1160 m 2 ·g t1 . PVA/ZIF-8 porous composites could also support a certain weight with almost no volume shrinkage. The carbon dioxide adsorption quantity of the composite was up to 11.3 cm 3 ·g t1 , proving that PVA/ZIF-8 porous composite has a good application prospect in the field of carbon dioxide adsorption.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yongkang Lai,Feng Tian,Yu Gao,Chen Li,Qikui Man,Baogen Shen
Designing an electromagnetic wave (EMW) absorbing material with ultra-wide effective absorption bandwidth (EAB) and low filling ratio is the key to solving the problem of electromagnetic pollution. In this study, the porous Ba 2 Co 2 Mn 1.2 Fe 10.8 O 22 /C (Mn-Co 2 Y/C) composites were prepared by radial freeze-drying method as well as high temperature carbonization process (400 °C, 500 °C, 600 °C, and 700 °C). The research results indicate that the sample annealed at 600 °C exhibits superior EMW absorption properties, achieving the widest EAB of 5.77 GHz at a thickness of 1.7 mm, which is attributed to the synergistic effect of multiple reflections of EMWs within microchannels of the samples and the interfacial polarization between Mn-Co 2 Y ferrite and C material. Samples prepared at 600 °C have the best impedance matching, which makes it easier for EMWs to enter the material, thus exhibiting better EMW absorption performance. The magnetic loss mainly originates from natural resonance at low frequencies and eddy current loss at high frequencies, and the dielectric loss stems from relaxation loss and conductivity loss.
研究领域:
材料科学
·
电磁学
✓ 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）