Materials
·
2022
·Vol. 15
·期 3
·924
·
IF 3.748
Bixia Jiang,Lin Cao,Qinghua Yuan,Zhuwen Ma,Zhenrui Huang,Zhidan Lin,Peng Zhang
A large amount of biomass straw waste is generated every year in the world, which can cause serious environmental pollution and resource waste if disposed of improperly. At present, biomass-derived porous carbon materials prepared from biomass waste as a carbon source have garnered attention due to their renewability, huge reserves, low cost, and environmental benevolence. In this work, high-performance carbon materials were prepared via a one-step carbonization-activation method and ball milling, with waste tobacco straw as precursor and nano-ZnO as template and activator. The specific surface area and porous structure of biomass-derived carbon could be controlled by carbonization temperature, which is closely related to the electrochemical performances of the carbon material. It was found that, when the carbonization temperature was 800 °C, the biochar possesses maximum specific surface area (1293.2 m2·g−1) and exhibits high capacitance of 220.7 F·g−1, at 1 A·g−1current density in a three-electrode configuration with 6 M KOH aqueous solution. The capacitance retention maintained about 94.83% at 5 A·g−1after 3000 cycles. This work proves the porous biochar derived from tobacco straws has a great potential prospect in the field of supercapacitors.Keywords:porous carbon materials;supercapacitor;tobacco straws;biochar
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Min Yuan,Meizhen Gao,Qi Shi,Jinxiang Dong
Zeolitic imidazolate framework (ZIF)-derived porous carbons are a new subclass of N-doped porous carbon materials showing great potential for many applications. However, water vapor is present in various industrial applications, and previous studies have tended to neglect water adsorption on ZIF-derived porous carbons. In this study, ZIF-8-derived porous carbon materials exhibiting different surface chemistry and pore structure have been prepared, and used to characterize the behavior of water adsorption. Investigations suggest that water uptake at P / P 0 < 0.2 is positively correlated with the N content, and that pyridinic-N and pyrrolic-N species make the dominant contribution to this water uptake. Strong polarization of surface structure occurs in pyridinic-N and pyrrolic-N species, which provides strong electrostatic interactions between these species and water, leading to an increase in the low-pressure adsorption capacity. As the pressure is increased, the water adsorption process becomes highly dependent upon the porous structure, and there is a critical pore width above which pore-filling occurs. Our results indicate that water uptake at P / P 0 = 0.6, 0.8, and 0.9 is indeed directly proportional to cumulative pore volume with pore widths of the 12, 22 and 40 Å, respectively. Thus, the small micropores of <12 Å are filled first at P/P 0 < 0.6, followed by the larger micropores of 12–22 Å at 0.6 < P/P 0 < 0.8, and finally the mesopores of 22–40 Å at 0.8 < P/P 0 < 0.9. The results presented in this work should be useful for the selection and construction of ZIF-derived porous carbon materials for applications where water is involved.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2019
·
IF 2.87
Jingyi Zou,Xiaogang Sun,Rui Li,Qiang He
Porous carbon materials are considered potential replacements for metal carriers in Li–SnO 2 batteries. Here, a 3D hierarchical porous carbon nanotube (CNT) scaffold was used as a collector to host SnO 2 . The novel collector comprised Co 2+ -doped porous carbon (PC) slices and a CNT network. The new Co–PC/CNT electrode demonstrated a high loading capacity of SnO 2 , accommodated the volume expansion of SnO 2 , and prevented its aggregation. Co played an important role in improving the initial discharge capacity and coulombic efficiency of the electrode. The SnO 2 –Co–PC/CNT electrodes exhibited outstanding electrochemical performance. The first-discharge specific capacity reached 2067 mAh·g −1 , and the utilization rate of active materials reached 82.92% at a current density of 100 mAh·g −1 . After 100 cycles, the specific discharge capacity remained greater than 698 mAh·g −1 , with a coulombic efficiency of 99.53%.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 45
·期 4
·1822-1833
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IF 3.288
Xufeng Song,Tianen Shui,Wanying Zhang,Keru Song,Xuesong Shan,Dongyu Zhao
In this study, we report a nickel-containing nitrogen-doped porous carbon material. Before this material is composited using a simple high-temperature treatment, it uses polystyrene microspheres as templates to prepare polyaniline microspheres and nickel ion-containing graphene oxide materials. This preparation method is efficient and convenient. We observed that polystyrene microspheres disappeared during high-temperature treatment, and the formation of a porous structure increased the specific surface area of this material. The prepared polyaniline provides N atoms and adds additional capacitance to the material. Besides, during the high-temperature treatment of graphene oxide containing nickel ions, the electrical properties of the material is further increased due to nickel-metal formation after reducing nickel ions. Hence, the Ni-containing N-doped porous carbon material samples showed good specific capacitance (351 F g−1). After 5000 cycles of charge and discharge, the capacitance remained at 92.1%. The calculated energy and power density of the assembled symmetrical supercapacitor were 6.16 W h kg−1 and 5994 W kg−1, respectively. Therefore, in the field of supercapacitors, the Ni-containing N-doped porous carbon materials prepared in this paper have a broad application prospect.
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
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Pengfei Zhang,Yutong Gong,Zhongzhe Wei,Jing Wang,Zhiyong Zhang,Haoran Li,Sheng Dai,Yong Wang
The development of meaningful ways to transfer biomass into useful materials, more efficient energy carriers, and/or carbon storage deposits is a profound challenge of our days. Herein, an ionothermal carbonization (ITC) method, via treating natural resources (glucose, cellulose, and sugar cane bagesse) in nonmetal ionic liquids (ILs) at ∼200 °C, is established for the fabrication of porous heteroatom-doped carbon materials with high yield. Commercial ILs with bulky bis(trifluoromethylsulfonyl)imide anion or cross-linkable nitrile group were found to be efficient and recyclable templates for porosity control, leading to exciting nanoarchitectures with promising performance in oxygen reduction reaction. The optimized ILs (12 mL) can dissolve and directly convert up to 15 g of glucose into porous carbon materials (SBET: 272 m2/g) one time. This ITC method relies on the synergistic use of structure-directing effect, good biomass solubility, and excellent thermal stability of ILs, and provides a sustainable strategy for exploiting biomass.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
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2015
·Vol. 6
·期 5
·3446-3457
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IF 3.84
Jiangdong Dai,Jun Sun,Atian Xie,Jinsong He,Chunxiang Li,Yongsheng Yan
Herein, the first preparation of a novel 3D hierarchically porous carbon (3D HPC) via precarbonization and in situ alkali activation, wherein mesoporous polydivinylbenzene (meso-PDVB) synthesized by a facile and general solvothermal route was used as the carbon precursor, is reported. Its physico-chemical properties were characterized by SEM, TEM, XRD, FT-IR, elemental analysis, Raman spectroscopy and N2 adsorption–desorption isotherm. 3D HPC exhibited a very large SSA of 3131.32 m2 g−1 and a pore volume of 1.462 cm3 g−1. Moreover, 3D HPC was used to eliminate a dye from wastewater for the first time. The effects of the contact time, initial dye concentration, temperature and solution pH on the adsorption of methylene blue (MB) onto 3D HPC were investigated by batch techniques. The isotherm and kinetics data were well described by a Langmuir model and a pseudo-second-order kinetic model, respectively. 3D HPC had a high adsorption affinity for MB over a broad pH range. 3D HPC displayed remarkably strong adsorption of MB, with a maximum adsorption capacity of 717.77 mg g−1 at 308 K. The adsorption process was endothermic and spontaneous, and the kinetics was controlled by film and intra-particle diffusion. The mechanism of the adsorption of MB was mainly attributed to van der Waals forces, π–π stacking and electrostatic interactions. In addition, 3D HPC displayed excellent reusability and exhibited promising potential for the treatment of dyes in wastewater.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Xu Qiao,Yuhan Xia,Xuhan Su,Bingkun Wang,Guang Chen,Huan Chen
Fulvic acid (FA) is an organic substance that is widely used in the field of wastewater treatment , and improving its recycling capacity is a current research hotspot. In this study, a porous carbon material was prepared using FA (PCFA). Brilliant green (BG) and sulfadiazine sodium salt (SDZ) were selected as the model pollutants to study the adsorption mechanism and performance of PCFA. The maximum adsorption capacities of PCFA toward BG and SDZ at pH values of 9 and 3 were 2250 and 941 mg g −1 , respectively. After five cycles, PCFA retained 63% and 56% of its initial adsorption capacity toward BG and SDZ, respectively. Experimental results showed the excellent adsorption capacity and cycling stability of PCFA, confirming its role as an efficient adsorbent. The findings of this study show an improvement in the recycling capacity of FA and provide a new approach for exploring the applications of FA.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Dan Yu,Yushuang Ma,Mingfeng Chen,Xiaoping Dong
Biomass precursors with natural porous structure and multifarious heteroatoms are desirably sustainable precursors for synthesis of carbon materials for energy and environmental applications. Herein, we reported wax gourd based porous carbons (WGPCs) with developed micro/mesoporous structures via potassium hydroxide (KOH) chemical activation . The optimized material that is denoted as WGPC-4 exhibits high specific surface area (2919 m 2 g −1 ) with oxygen and nitrogen contents of 17.9 at.% and 1.0 at.%, respectively. In a three-electrode system, the WGPC-4 electrode presents high specific capacitance of 333 F g −1 at current density of 1 A g −1 . Meanwhile, the assembled symmetrical cell using aqueous electrolyte (0.5 M Na 2 SO 4 ) has high specific capacitance (167 F g −1 at 1 A g −1 ), stable cycling characteristics (93% capacitance retaining after 5000 runs) and excellent energy density of 19.2 Wh kg −1 . Furthermore, these WGPC-4 electrodes were assembled into an all-solid-state supercapacitor using KOH/polyvinyl alcohol (PVA) gel as solid electrolyte , whose specific capacitance is 258 F g −1 at 1 A g −1 , retention at the 2500th run is 87% and energy density is 13.0 Wh kg −1 under a high power density. These materials with excellent structural characteristics are an ideal candidate for high-performance supercapacitors .
研究领域:
材料科学
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能源与环境科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2016
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IF 5.267
Jiang Deng,Tianyi Xiong,Haiyan Wang,Anmin Zheng,Yong Wang
Porous carbon materials stemming from biomass have drawn increasing interest because of their sustainable properties. Cellulose, hemicellulose, and lignin are the three basic components of crude biomass, and were investigated to reveal their influence on the derived carbonaceous materials. Huge amounts of oxygen-containing functional groups in cellulose and hemicellulose tend to be eliminated as H2O, CO2, and CO and give micropores during pyrolysis, whereas lignin contains plentiful aromatic units which are chemically inert, and thus produce nonporous carbon materials. When the KHCO3 was introduced during the pyrolysis process, the plentiful hydroxyl in cellulose and hemicellulose underwent dehydration condensation among different parent polymers, which are responsible for the formation of macroporous structure. By contrast, The β-O-4 bands in lignin experience homolysis and give rise to benzene-containing units, which finally result in carbon nanosheets. Furthermore, we demonstrated the mixture of cellulose, hemicellulose, and lignin can display a three-dimensional porous structure (containing macropores, mesopores, and micropores) when less than 50% of lignin is contained.
研究领域:
材料科学
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生物化学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 185
·期 1
·1-7
·
IF 4.58
Huang Wei,Zhang Ting,Hu Xiaoya,Wang Yang,Wang Jianmin
A porous carbon material doped with an iron species (Fe/PC) was prepared by carbonizing a mixture of zeolitic imidazolate framework-8 in the presence of iron(II) ions. The resulting material was characterized by X-ray diffraction, nitrogen adsorption isotherms, transmission electron microscopy, and by Raman and X-ray photoelectron spectroscopy. Fe/PC was the deposited on the surface of glassy carbon electrode (GCE) to obtain a sensor for amperometric determination of phenolic compounds. The unique catalytic activity, good electrical conductivity and hierarchical structure of the Fe/PC composite results in good electrooxidative activity towards hydroquinone (HQ; typically at 44 mV) and catechol (CC; typically at 160 mV). Under optimal conditions, the amperometric responses are linear in the range from 0.1 to 120 μmol · L −1 for HQ, and from 1.0 to 120 μmol · L −1 for CC. The respective detection limits are 14 and 33 nmol · L −1 . The sensor is highly selective against potential interferents and was successfully applied to the determination of HQ and CC contents in (spiked) water samples.
An amperometric sensor for phenolic compounds was constructed by using a metal-organic framework derived iron doped porous carbon material.
研究领域:
分析化学
·
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Tuo Di,Yunxia Xia,Baoyou Pei,Tingting Zhu,Tiansheng Zhao,Tiesheng Li,Lei Li
The development of simple and highly effective desulfurization technology is attracting more and more interest in both industrial and academic fields. Here, a new family of precursors was prepared based on hyper-cross-linked asphalt and coal tar building blocks. Thanks to the preintroduced porous structure, the precursors were converted into carbons with high surface area and large micropore volume via a uniform carbonization process. The synergistic effects of high surface area, abundant microporous structure, and the introduced polar functional groups endow the carbon materials with high desulfurization performance. The results of repeated experiments show that the adsorption capacities of five carbonized samples are higher than 40 mg S g–1, and the theoretical maximum adsorption capacity reaches 44.7 mg S g–1. Particularly, the adsorption equilibrium of all the carbonized samples can be reached in 5 min. Moreover, the recycle adsorption performance was also studied. Toluene exhibits the best elution effect among three eluents (iso-octane, para-xylene, and toluene) and the adsorption capacity remains 89% of the initial adsorption capacity after two adsorption–desorption cycles. It is believed that both innocent treatment of byproducts from petroleum industry and their high-value application for deep desulfurization in liquid hydrocarbon fuels benefit environmental protection and sustainable development.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Yanbing Sun,Haoyan Zhang,Nan Yuan,Yulin Ge,Ying Dai,Zhen Yang,Liang Lu
A simple strategy to prepare cost-effective adsorbent materials for the removal of U(VI) in radioactive wastewater is of great significance to environmental protection. Here, activated orange peel was used as a precursor for the synthesis of biomass charcoal, and then a phosphorylated honeycomb-like porous carbon (HLPC-PO 4 ) material was prepared through simple phosphorylation modification. FT-IR and XPS showed that P–O–C, P–C, and P˭O bonds appeared in HLPC-PO 4 , indicating that the phosphorylation process is mainly the reaction of C–O bonds on the surface of the material with –PO 4 . The results of the batch experiments showed that the uptake equilibrium of HLPC-PO 4 to U(VI) occurred within 20 min, and the kinetic simulation showed that the process was monolayer chemical adsorption . Interestingly, the maximum U(VI) uptake capacity of HLPC-PO 4 at T = 298.15 K and pH = 6.0 was 552.6 mg/g, which was more than 3 times that of HLPC. In addition, HLPC-PO 4 showed an adsorption selectivity of 70.1% for U(VI). After 5 cycles, HLPC-PO 4 maintained its original adsorption capacity of 90.5%. The adsorption mechanism can be explained as the complexation of U(VI) with P–O and P˭O on the surface of the adsorbent, confirming the strong bonding ability of –PO 4 to U(VI).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）