Sustainable Chemistry for Climate Action
·
2023
·
IF 0
Ya-Qi Ba,Yong-Sheng Wang,Tian-Yi Li,Zhe Zheng,Guang-Ping Hao,An-Hui Lu
CO 2 capture from flue gas is one of the global urgent tasks. Adsorption separation of CO 2 is an energy-efficient way as compared to the absorption method. The central issue is to devise efficient adsorbents that work well under flue gas conditions with temperatures of 323–348 K and low CO 2 concentrations of 15%. In this work, we targeted this issue and proposed a well-controlled diffusion strategy, which is achieved over a series of poly(furfuryl alcohol)-derived carbons (PFCs) with dense and abundant ultra-micropores. As the adsorption temperature increased from 298 to 348 K, the CO 2 capture capacity is 54% kept for PFC-800, which is 1.2 times higher than that for samples without diffusion limitation. The capture of CO 2 is kinetics control at ambient temperature, however, at 348 K CO 2 with higher kinetic energy can overcome the restriction of the narrow pore entrance and the CO 2 /N 2 selectivity for simulated flue gas composition increases from 20 to 40. Furthermore, the PFCs exhibit a high CO 2 volumetric adsorption capacity of 97 cm 3 cm −3 at 298 K and 1 bar, benefiting the practical application deployed with an integrated adsorption column. The diffusion kinetics can be further tuned when altering the bulk phase into nanocoating, which would inspire their application in different scenarios.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Lina Zhou,Dan Liu,Junshen Li,Haolin Tang,Zhizhong Xie,Deyu Qu
A nitrogen-doped carbon material with uniformed micro-porosity structure was synthesized by carbonized a copolymer made with a molecular-scale template, octa(aminophenyl)silsesquioxane，and phenolic resol and the silica domain removing. High nitrogen content as well as unimodal micropore with narrow size distribution were achieved. This nitrogen doped well-defined microporous carbon exhibited high electrochemical hydrogen storage and superior stability over those in regular active carbon material .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2023
·Vol. 69
·期 6
·e18046
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IF 3.7
Zhiwei Zhao,Yueyue Liu,Xing Liu,Yuan Liu,Jingwen Chen,Shixia Chen,Shuguang Deng,Jun Wang
The one-step adsorptive separation of high-purity ethylene (C 2 H 4 ) from a ternary gas mixture (C 2 H 2 /C 2 H 4 /CO 2 ) is challenging and has not been reported on porous carbons. Herein, we report camphor seeds husk-derived ultramicroporous carbons (CSHs) show high affinities toward acetylene (C 2 H 2 ) and carbon dioxide (CO 2 ) over C 2 H 4 . The optimized CSH-2-700 with high heteroatom contents and centered pore size distributions shows high C 2 H 2 adsorption capacity (2.24 mmol g −1 ) and record ideal adsorbed solution theory (IAST) C 2 H 2 /C 2 H 4 selectivity (10.2) among one-step C 2 H 4 purification adsorbents. Meanwhile, CSH carbons are the only carbon adsorbents that preferentially adsorb CO 2 over C 2 H 4 , with a CO 2 /C 2 H 4 selectivity of 1.9 under ambient conditions. Furthermore, dynamic breakthrough experiments verified its feasibility for one-step C 2 H 4 purification from a three-component C 2 H 2 /C 2 H 4 /CO 2 gas-mixture.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Carbon Letters
·
2019
·Vol. 29
·期 3
·213-218
·
IF 1.807
Ding Chenfeng,Yan Xiaodong,Lan Jin-le,Ryu Seungkon,Yu Yunhua,Yang Xiaoping
Sustainable biomass-derived porous carbons demonstrate excellent capacitive properties owing to their heteroatom-rich nature and distinct textural feature. Herein, a series of nitrogen-/phosphorus-/oxygen-containing microporous carbons (CWW-N/P/O-MPCs) have been successfully fabricated by etching in H 2 O 2 solution, pre-treatment of camphor wood wastes with KOH solution and subsequent carbonization. As an electrode material for supercapacitors, the typical microporous carbon (CWW-N/P/O-MPCs-0.5) exhibits a remarkably high specific capacitance of 245 F g −1 at 0.5 A g −1 , corresponding to an impressively large volumetric capacitance of 208 F m −3 , and excellent long-term stability over 10,000 cycles. The excellent electrochemical performance can be ascribed to the optimal combination of heteroatom groups and ultrafine micropores.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 7
·1901933
·
IF 4.948
Qianfang Tang,Min Zhong,Hao Liu,Xiangying Chen,Zhongjie Zhang,Shuanghong Chen
In present work, commercial microporous carbon materials are modified on the surface with phosphorus/oxygen species by using phytic acid as sole dopant, which plays crucial effect on the carbon structure, wettability, electrical conductivity, and capacitive behaviors. It reveals that with increasing the content of heteroatoms, the porosity and contact angle are decreased but the conductivity turns much larger. Furthermore, p- aminophenol is introduced to serve as redox additive, which can produce more active surface sites by forming hydrogen bond and complexation with the surface functional groups, further providing additional pseudo-capacitance. As a result, the energy density of carbon sample by phosphorus/oxygen doping in 1 m H 2 SO 4 electrolyte with p- aminophenol is as high as 9.2 Wh kg −1 , which is 2.6 than that of pristine carbon. What is more, in terms of the simple operation and effective performance, the integration of surface modification toward carbon materials and redox additive can be favorable for largely enhancing the supercapacitor performance.
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 Environmental Sciences
·
2023
·
IF 6.9
Wenfu Zhu,Yuqin Wang,Fan Yao,Xiaohong Wang,Haoming Zheng,Guangzheng Ye,Hairong Cheng,Junliang Wu,Haomin Huang,Daiqi Ye
Waste resource utilization of petroleum coke is crucial for achieving global carbon emission reduction. Herein, a series of N-doped microporous carbons were fabricated from petroleum coke using a one-pot synthesis method. The as-prepared samples had a large specific surface area (up to 2512 m 2 /g), a moderate-high N content (up to 4.82 at.%), and high population (55%) of ultra-micropores (<0.7 nm). Regulating the N content and ultra-microporosity led to efficient CO 2 adsorption and separation. At ambient pressure, the optimal N-doped petroleum coke-based microporous carbon exhibited the highest CO 2 uptake of 4.25 mmol/g at 25°C and 6.57 mmol/g at 0°C. These values are comparable or even better than those of numerous previously reported adsorbents prepared by multistep synthesis, primarily due to the existence of ultra-micropores. The sample exhibited excellent CO 2 /N 2 selectivity at 25°C owing to the abundant basic pyridinic and pyrrolic N species; and showed superior CO 2 adsorption-desorption cycling performance, which was maintained at 97% after 10 cycles at 25°C. Moreover, petroleum coke-based microporous carbon, with a considerably high specific surface area and hierarchical pore structure, exhibited excellent electrochemical performance over the N-doped sample, maintaining a favorable specific capacitance of 233.25 F/g at 0.5 A/g in 6 mol/L KOH aqueous electrolyte. This study provides insight into the influence of N-doping on the porous properties of petroleum coke-based carbon. Furthermore, the as-prepared carbons were found to be promising adsorbents for CO 2 adsorption, CO 2 /N 2 separation and electrochemical application.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiannan Cheng,Tao Peng,Jie Li,Lijie Liu,Qingquan Tang,Luoxin Wang,Hua Wang,Jiang Gong
With the rapid popularity of liquid crystal polyesters (LCPs) in 5G chip packaging materials, a large amount of waste LCPs were produced. However, the recycling and reutilization of waste LCPs are rarely investigated so far. Herein, the waste LCPs are calcinated by “controlled carbonization” strategy to produce microporous carbons, showing potential in producing freshwater and electricity based on solar-irradiated photothermal conversion. ZnCl 2 /NaCl eutectic salts were used to catalyze the dehydration and decarboxylation of LCPs to form aromatic fragments and then construct microporous carbon skeletons. The resultant carbons show high specific surface areas and solar absorption efficiency. They were used to prepare interfacial solar steam evaporators, showing a high evaporation rate of 2.17 kg/m 2 /h with the energy conversion efficiency of 97.5 % and a high electricity generation with an output power of 0.902 W/m 2 under 1 sun irradiation. This work not only provides a feasible approach to the sustainable conversion of low-cost waste LCPs into valuable carbon materials by a “controlled carbonization” strategy, but also gives impetus to the potential of microporous carbons for application in solar freshwater and electricity generation.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Jianbo Zhao,Jun Wei,Di Cai,Hui Cao,Tianwei Tan
A poly(amino acid)-based approach for scalable synthesis of micro-/mesoporous carbon (PC) with high specific surface area and narrow distribution of micro- and mesopores is presented. Using cross-linked poly aspartic acid as a precursor, PC was obtained by in situ one-step carbonization without the activating agent. The resulting PC had an ultrahigh adsorption capacity for H2 (4.43 wt %) and CH4 (4.49 mmol g–1). This novel method could significantly decrease the wastewater hazards caused by washout of the considerable amount of the activating agent. The PC showed promising application in gas adsorption and storage.
研究领域:
材料科学
·
能源存储
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Guojian Chen,Xiaochen Wang,Jing Li,Wei Hou,Yu Zhou,Jun Wang
A family of nitrogen-enriched ultramicroporous carbon materials was prepared by direct carbonization of task-specifically designed molecular carbon precursors of cyanopyridinium-based crystalline dicationic salts (CISs). Varying the molecular structure of CISs, large surface area (918 m2 g–1), high N content (20.10 wt %), and narrow distributed ultramicropores (0.59 nm) can be simultaneously achieved on the sample PCN-14 derived from methyl-linked 4-cyanopyridinium D[4-CNPyMe]Tf2N. It therefore exhibited exceptional performance in greenhouse gas CO2 capture, i.e., simultaneously possessing (1) high CO2 adsorption uptakes: 5.33 mmol g–1 at 273 K, and 3.68 mmol g–1 at 298 K (both at 1.0 bar); (2) unprecedented selectivity of CO2 versus N2: 156; and (3) a high adsorption ratio of CO2 to N2: 148 (at 1.0 bar). This is the first time such a high selectivity and adsorption ratio over carbon materials has been achieved, which is among the highest values over solid 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 Cleaner Production
·
2020
·
IF 7.246
Shasha Wang,Yuelong Xu,Junfeng Miao,Mengshuai Liu,Bin Ren,Lihui Zhang,Zhenfa Liu
Microporous carbon xerogels (CXs) were successfully fabricated via a facile one-pot strategy using eutectic salt mixture (KCl and ZnCl 2 ) as dual activator and catalyst. Their pore structures, morphology, and selective CO 2 adsorption behaviors were thoroughly studied by varying the contents of eutectic salt mixture. The presented CXs herein showed excellent CO 2 adsorption selectivities , and the CX-4 with optimum salt concentration (12.9%) exhibited the highest CO 2 adsorption capacity of 4.39 mmol g −1 at 273 K, which was ascribed to their special microscopic pore structure. Compared with the reported carbon materials, the optimum CX-4 exhibits a comparable or superior CO 2 adsorption performance under similar conditions, showing great potential for efficient CO 2 capture and separation from flue gas and natural gas.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhiwei Zhao,Ke Wu,Yong Peng,Yi Liu,Zhenning Deng,Xinxin Han,Shixia Chen,Jingwen Chen,Shuguang Deng,Jun Wang
The direct adsorptive separations of xenon (Xe) and krypton (Kr) using granular porous carbons remain challenging yet industrially important. Herein, we report microporous carbon granules with narrow pore size distributions and rich oxygen functionalities for efficient Xe/Kr separation. The optimized granular carbon (GBC-900) breaks the trade-off effect by showing high Xe uptake capacity (4.71 mmol g −1 ) and Xe/Kr selectivity (18.3) at 298 K and 1.0 bar. Notably, the synergistic effect of oxygen-functionalities and uniform micropores renders the ultrahigh Xe uptake of 2.78 mmol g −1 at 0.2 bar. Furthermore, density functional theory calculations disclose the strong affinity between oxygen groups and Xe atoms. Dynamic breakthrough experiments confirm the practical Xe/Kr separation feasibility even from humid and low-concentration Xe/Kr gas-mixtures.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Shuai Yang,Tao Li,Jun Fang,Shichong Yao,Zhenyu Li,Yunyun Liu,Jie Chen,Yuanliang Yuan,Xiaocong Zhong
N,O-codoped microporous carbon (HPC) was derived from hypnum plumaeforme via precarbonization and KOH activation and utilized as an electrode for supercapacitors. The HPC750 sample, produced at an activation temperature of 750 °C, demonstrated superior capacitive behavior due to its large specific surface area, microporous architecture, and high number of oxygen and nitrogen heteroatoms. These HPC750 electrodes have a specific capacitance of up to 424 F g −1 at a current density of 1 A g −1 while also providing excellent rate performance, maintaining >85 % capacitance over a range of 1 to 100 A g −1 . In a symmetric supercapacitor configuration using 6 M KOH and 1 M Na 2 SO 4 as electrolytes, the HPC750 electrodes exhibit high specific capacitances of 96.2 F g −1 and 65.8 F g −1 at a current density of 1 A g −1 , respectively. With the Na 2 SO 4 electrolyte, the device achieved a peak energy density of 29.9 W h kg −1 and a peak power density of 225 W kg −1 . In addition, the electrodes retained approximately 90 % of their initial capacitance after 15,000 cycles at a current density of 5 A g −1 .
研究领域:
材料科学
·
能源存储
·
植物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）