ChemElectroChem
·
2019
·Vol. 7
·期 3
·631-641
·
IF 3.975
Wei Nie,Xiaolin Liu,Qingmei Xiao,Liuxin Li,Guoxin Chen,Dong Li,Min Zeng,Shengwen Zhong
Graphical Upcycling rice husks : Hard carbon materials derived from rice husks with hierarchical porous and high specific surface area structures were successfully prepared by a low-cost carbonization approach. The hard carbon material synthesized at 800 °C was exploited as an anode material for sodium-ion batteries, which results in promising enhancement in all electrochemical parameters. This work represents a promising technology for low-cost and high stable sodium-ion storage. Compared with the cathode materials, the research on the anode materials of the sodium-ion batteries has lagged behind. Therefore, development of the anode materials with high capacity, long life, and excellent rate properties is the key to unlocking the practical application for sodium-ion batteries. This study presents the preparation of hierarchical porous hard carbon as an active anode material from rice husks. The as-synthesized materials are characterized by X-ray diffraction, N 2 adsorption, Raman spectra, scanning electron microscopy and transmission electron microscopy. These porous hard carbon materials exhibit a high specific surface area and are promising for reversible sodium storage. Galvanostatic studies show that the specific initial capacities of all samples were in the range of 130–300 mA h g −1 at a current density of 100 mA g −1 between 0.01 V and 2.3 V. Compared to the other samples, the hard carbon materials prepared at 800 °C from rice husk (RHPC-800) can deliver a high reversible capacity of 274 mA h g −1 at a current density of 25 mA g −1 , maintain a capacity of approximately 260 mA h g −1 , and retain 92.7 % of its capacity after 500 cycles. This excellent electrochemical performance of the as-prepared RHPC-800 material is attributed to the high specific surface area and low charge transfer resistance.
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
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
·
2022
·
IF 2.655
Sheng Liu,Yiyang Zeng,Ai Zhang,Yuxin Song,Yuran Ni,Jiamao Li,Fangting Chi,Chengjian Xiao
Due to the rapid diffusion of radioactive iodine, the demand for safe and efficient capture and storage of radioactive iodine is increasing worldwide. The use of porous carbon materials to capture iodine has aroused great interest. This work prepared porous carbon materials derived from polymetallic oxides of the zeolitic imidazolate framework (ZIF) by pyrolysis at 1000 °C. The carbon materials (CZIF-1000) have a high specific surface area of about 1110 m 2 /g and a total pore volume of 0.92 cm 3 /g. Adsorption studies have shown that the CZIF-1000 had significant adsorption performance for iodine, and the adsorption capacity can reach 790.8 mg/g at 8h. The potential mechanism of adsorption is that the carbonization causes the charge-transfer interaction and pore size distribution. Compared with the conventional adsorbents, the adsorbents showed faster kinetics and high extraction capacity for iodine. This experiment provides an effective method for designing a highly efficient adsorbent for iodine and broadens the ideas for developing new iodine extraction adsorbents.
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
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Ruiming Zhang,Luowen Xu,Fengtao Yu,Saijin Xiao,Changfu Wang,Dingzhong Yuan,Yan Liu
The discharge of effluents containing radionuclides has a detrimental impact on the ecological environment, emphasizing the importance of recovering U(VI) from nuclear wastewater to safeguard the environment. Electrosorption has emerged as a viable technique for the extraction of uranium from radioactive solutions. Herein, we propose a facile strategy utilizing ultrasonication to fabricate a novel sulfonated carbon material (HCCMs-SO 3 H) co-doped with B, N, and P atoms. The incorporation of sulfonate groups and doping heteratoms in HCCMs-SO 3 H significantly enhanced its electrosorption capacity for uranium, yielding an impressive capacity of 626.37 mg/g at 0.9 V. This enhancement in electrosorption ability is attributed to the synergistic effects of sulfonate groups and the presence of B, N, and P atoms in the carbon matrix. Furthermore, HCCMs-SO 3 H exhibited excellent recoverability and selectivity towards uranium, endowing it a promising material for uranium extraction from uranium-containing solutions. Its high electrosorption capacity, coupled with favorable recoverability and selectivity, positioned HCCMs-SO 3 H as a potential candidate for efficient and environmentally friendly uranium recovery processes.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2025
·
IF 9.2
Wurentuya Bhnar,Agula Bao
Globally, a large amount of agricultural waste is generated every year, and improper disposal can lead to serious environmental pollution. In particular, due to the expansion of large-scale cattle farming, the accumulation of large quantities of cattle manure can cause various environmental problems. Using agricultural waste, such as cattle manure, to produce porous carbon materials can enhance its resource utilization while mitigating its environmental impact. Accordingly, in this study, porous carbon materials were synthesized by partially degrading the lignocellulosic fractions in cow dung through a series of processes, including NaOH pretreatment under varying conditions (concentration, time, and temperature), pre‑carbonization, and KOH activation. Furthermore, the pore-formation mechanism of the porous carbon materials was analyzed in three stages: NaOH pretreatment, pre‑carbonization at 600 °C in an N 2 atmosphere, and KOH activation. Key factors influencing the structures of the materials were changes in the contents and linkages of cellulose, lignin, and hemicellulose. Among the tested samples, the pretreated CA-4-6-70 sample demonstrated the lowest lignin content and the highest cellulose content. Following pre‑carbonization and KOH activation, the specific surface area of this material reached 1402 m 2 /g, with a microporous area of 912 m 2 /g. Furthermore, the porous carbon materials synthesized in this study exhibited good CO 2 and methyl orange adsorption performance, demonstrating their potential for applications in environmental pollutant treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 15
·A3564
·
IF 3.12
Yuanduo Qu,Zhiwei Tang,Lianfeng Duan,Xuesong Li,Xueyu Zhang,Wei Lü
Great efforts have been dedicated to fabricating electrode materials of supercapacitors especially for carbon-based system. To achieve satisfied device performance, the fabrication of electrodes generally involved complicated procedure, poisonous agents, and expensive materials. Herein, we develop a facile and economical method to prepare carbon-based electrode materials. The nitrogen-rich g-C3N4 is used as template and N source, and glucose is used as C source to prepare N-doped 3D porous carbon materials by hydrothermal treatment followed by calcinations. The structure and N content could be adjusted by hydrothermal temperature. The specific surface area of 954 m2 g−1 and 11% N content is achieved, thus providing the excellent carrier storage ability and electrocatalytic activity. The supercapacitors fabricated from present 3D carbon networks achieve a specific capacitance of 90F/g, and shows excellent cycling stability. Present method is free of involving complicating procedure and poisonous reagents for fabrication of 3D carbon structures.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 10
·2336
·
IF 3.2
Xishi Wu,Zehua Liu,Bingbing Pei,Haibo Wu,Zhengren Huang
In this work, the metal salts were introduced into the resin-solvent gel system to leverage their ortho-substitution effect, thereby accelerating the polymerization-induced phase separation process. Subsequent in-situ carbonization resulted in the preparation of porous carbon materials with three-dimensional interconnected pores. By precisely tuning the parameters of the resin-solvent-metal ion system, control over the pore structure of the porous carbon was achieved, with a porosity range of 16.5% to 66.5% and a pore diameter range of 8 to 248 nm. The addition of metallic salts can simply and effectively increase the pore structure after carbonization, making the infiltration of molten silicon easier. This is beneficial to the joining process of silicon carbide ceramics. Based on these findings, a high-reliability joining technique for large-sized (135 mm × 205 mm) silicon carbide ceramics was developed. The resulting interlayer was dense and defect-free, exhibiting a joining strength of 309 ± 33 MPa and a Weibull modulus of 10.67. These results highlight the critical role of structured porous media in advancing the field of large-sized ceramic joining.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Chenxiang Feng,Wei Jian,Junxiu Chen,Agula Bao
The environmental problems caused by excessive CO2 emissions have made the development of adsorbent materials for capturing CO2 an important topic. N-doped porous carbon materials are attractive for CO2 adsorption because of their large specific surface area, porous structure, and multiple active sites. S and N are known to work well together as codopants, but the effects of S on N and the synergistic effects of S and N on carbon materials need to be clarified. In this study, N and S codoped porous carbon samples with an ultramicroporous structure were prepared by using lignin as the carbon source and thiourea as the sulfur source. The prepared samples had a specific surface area of up to 1723 m2/g and N and S contents of up to 1.60 at % and 0.23 at %, respectively. In tests, the best-performing sample had a CO2 adsorption capacity of 3.58 mmol/g at 298 K and 1 bar, which can be attributed to ultramicropores (<1 nm) making up 67.8% of the pore volume. S doping had the synergistic effect of increasing the pyrrole N content on the sample surface, which increased the CO2 adsorption capacity. The present study provides insights into using N and S codoping to develop high-efficiency carbon-based adsorbents for CO2 capture.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wan-Ting Yang,Yang-Yang Xie,Shi-Mei Xu,Gang Wu,Yu-Zhong Wang
The increasing accumulation of plastic waste, particularly polyvinyl chloride (PVC) plastics containing halogens, has led to severe environmental issues. To achieve environmentally friendly treatment and upcycling of PVC , this study presents a straightforward two-step method for converting PVC into porous carbon materials. First, PVC is subjected to ambient temperature ball milling in a KOH/polyethylene glycol (PEG) system to efficiently remove chlorine atoms (degree of dechlorination up to 93.88 %), yielding a crosslinking precursor. Subsequently, the precursor is carbonized via co-carbonization with K 2 CO 3 , resulting in a layered porous carbon material with a high surface area and abundant micropores and mesopores. This method significantly reduces the emission of the corrosive gas HCl during carbonization while improving the carbon yield. The prepared carbon material exhibits excellent electromagnetic wave (EMW) absorption performance, with a minimum reflection loss (RL) of −47.65 dB at a thickness of 3.5 mm and filler loading of 10 wt%, along with an effective absorption bandwidth (EAB) of 4.96 GHz. This method has the potential to be extended to practical PVC products and represents a new approach to the upcycling of waste PVC.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2011
·
IF 3.722
Jiayue Ma,Yunsong Zhang,Xiaohua Zhang,Gangbing Zhu,Bo Liu,Jinhua Chen
A sensitive electrochemical sensor for nitrobenzene (NB) detection has been developed based on macro-/meso-porous carbon materials (MMPCMs). MMPCMs were prepared by pyrolysis of the ionic-liquid ([AEIm]BF 4 ) polymer (PIL) pre-wrapped onto SiO 2 microspheres and then removal of the silica core. The morphology and structure of MMPCMs were characterized by scanning electron microscopy (SEM) and nitrogen adsorption/desorption measurements. Owing to the macro-/meso-porous structure, large specific surface area and accumulation effect of MMPCMs, the MMPCMs modified glassy carbon (MMPCMs/GC) electrode has high catalytic activity towards the reduction of NB. At the optimal pH value and accumulation time, the resulted electrochemical sensor shows satisfactory analytical performance for NB detection. The linear response range is from 0.2 μM to 40 μM and the detection limit is 8 nM based on the signal-to-noise ratio of 3. Moreover, the MMPCMs/GC electrode exhibits good stability and reproducibility, and acceptable selectivity.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 44
·25480-25487
·
IF 3.049
Siji Chen,Zhixiao Wang,Yuhan Xia,Bolun Zhang,Huan Chen,Guang Chen,Shanshan Tang
In this work, fungal hyphae (FH, Irpex lacteus) was used as the carbon resource for the preparation of porous carbon materials (PCFH) using mixed alkali as the activator. The SEM, N2 adsorption/desorption, FT-IR, XRD, Raman, and XPS were used to characterize the structure and surface properties of PCFH. The results showed that the PCFH not only has a huge Brunauer–Emmett–Teller (BET) surface area (2480 m2 g−1), but also has abundant functional groups containing carbon, oxygen, and nitrogen. Rhodamine B (RhB) was selected to evaluate the adsorption properties of the PCFH prepared under different conditions in dyeing wastewater. A fast adsorption rate was observed, and an uptake capacity of 765 mg g−1 was achieved in the initial 5 min. The maximum adsorption capacity of PCFH to RhB reached 1912 mg g−1 at the pH value of 9, which could efficiently remove RhB from the aqueous solution. The adsorption process was fitted better by a pseudo-second order model, and the adsorption isotherm for the RhB was well fitted by the Freundlich model. Moreover, the probable mechanism of adsorption was analyzed. In short, the good adsorption performance of PCFH indicated that it has a broad application prospect for dye water pollution control.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 13
·5949-5957
·
IF 3.591
Xuexia Liu,Shuaihui Li,Limin Liu,Zhijun Wang
The development of active and stable carbon nanomaterials as electrocatalysts for the oxygen reduction reaction (ORR) remains a significant challenge. Herein, we report a one-step pyrolysis process to design hierarchical micro/mesoporous N-doped carbon (m-NC) materials using low-cost folic acid precursors. The optimal m-NC material carbonized at 750 °C (m-NC-750) displays a splendid ORR electrocatalytic activity and perfect stability in an alkaline medium (0.1 mol L−1 KOH). Notably, the current density of m-NC-750 can reach 4.35 mA cm−2 at 0.85 V, which surpasses that of commercial Pt/C (20 wt%). The higher electrocatalytic activity and activation of oxygen is due to the porous structures facilitating ion diffusion and the graphitic N dopant providing more active sites. In addition, the graphite N dopant of the m-NC material possesses the lowest energy barrier of reactions based on density functional theory (DFT) calculations, which effectively boosts the ORR of the as-prepared materials. This simple and economical method provides a facile way of designing high-performance carbon electrocatalysts for the ORR.
研究领域:
材料科学
·
电化学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2019
·
IF 2.515
Man Liu,Zhihong Qin,Xiaoqin Yang,Zhe Lin,Tong Guo
A smooth and defectless carbon sheet with thickness of 1–2 μm was prepared by loose medium component from coal. Then, porous carbon sheet materials were prepared by activation of the carbon sheet using KCl and KOH under 750 °C and N 2 atmosphere. Such materials have lattice defect and porous structure which were verified by emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman and N 2 adsorption-desorption. Their electrochemical performances were studied by cyclic voltammetry curves and constant current charge-discharge curves. The results showed that varing the content of KCl could control the distribution of the mesopore so as to change the specific capacitance. When carbon/KCl/KOH was at a mass ratio of 1:3:4, the specific capacitance reached up to 346 F g −1 at the current density of 0.1 A g −1 with high energy density and power density of 12 Wh kg −1 and 25 W kg −1 , respectively. The high specific capacitance of this material was corresponded to its porous structure with high specific surface area of 3627 m 2 g −1 . Based on the above structure features and performance results, this paper supplies a brand new and promising way for synthesis of supercapacitor materials .
研究领域:
材料科学
·
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）