SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Zhenhua Niu,Wenjia Luo,Peng Mu,Jian Li
Membrane separation technology has received widespread attention in the field of gas separation because of small footprint, convenient operation and low energy consumption. However, membranes separation are subject to a trade-off between permeance (or permeability) and selectivity. Herein, a novel kind of supported oinic liquid membrane (SILM) was constructed by nanoconfined 1-ethyl-3-methylimidazole acetate ([EMIm][AcO], IL) in the two-dimentional (2D) channels of the g-C 3 N 4 laminated membrane for CO 2 /N 2 and CO 2 /CH 4 separation. Due to the nanoconfinement of ILs in 2D g-C 3 N 4 laminated membrane and the appropriate nanofluidic channels constructed by the g-C 3 N 4 nanosheets, the as-prepared g-C 3 N 4 SILM possesses outstanding permeance and selectivity for CO 2 in separation of CO 2 /N 2 and CO 2 /CH 4 . The experimental result shows that g-C 3 N 4 SILM possesses maximum CO 2 permeance of 992.97 GPU in separation of CO 2 /N 2 and 1160.52 GPU in separation of CO 2 /CH 4 under 1 bar, 25℃. Meanwhile the resultant g-C 3 N 4 SILM shows excellent selectivity for CO 2 /N 2 (52.49) and CO 2 /CH 4 (48.41) respectively. Moreover, the resulted g-C 3 N 4 SILM displays excellent thermal stability and durability. After 60 h test, its separation performance has no obvious change. The findings of our study demonstrate that nanoconfined the IL into the 2D g-C 3 N 4 is a novel strategy for the preparation of high-performance supported liquid membrane for the separation of CO 2 /N 2 and CO 2 /CH 4 .
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Jingjiao Cao,Wanjian Shan,Qian Wang,Xingchen Ling,Guoqing Li,Yinong Lyu,Yu Zhou,Jun Wang
Porous poly(ionic liquid)s (PPILs) combine the features of porous materials, polymers, and ionic liquids (ILs) or their derivatives, but they are normally of amorphous structure with disordered pores. Here, we report the facile synthesis of ordered porous poly(ionic liquid) crystallines (OPICs, specialized as a kind of PPIL analogues) with diverse and adjustable framework IL moieties through the Schiff base condensation of IL-derived ionic salts and neutral monomers. Ternary monomer mixtures are employed to artistically control the chemical composition and pore configurations. Compact atomic packing was achieved to give spacing confined ionic surface with strong CO2 affinity. Through monomer control, OPICs exhibit high CO2 uptakes with excellent CO2/N2(CH4) selectivities and efficiently implement CO2 fixation through catalyzing epoxides cycloaddition under down to ambient conditions.
研究领域:
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
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 32
·13755-13763
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IF 3.288
Xia Wang,Wulan Zeng,Wenjing Liu,Xiaoyu Cao,Chunhui Hou,Qi Ding,Yaxuan Lü
The design and development of low-cost sorbents is vital for CO2 capture from flue gases. In this study, the lignite char from Ordos coal (SE) was treated by a one-step KOH activation method to prepare microporous activated carbons for CO2 adsorption. The textural pore properties, surface functional groups and element contents of SE before and after activation were characterized and discussed; the effects of the mass ratio of KOH to SE, activation temperature and time, as well as the adsorption temperature on CO2 adsorption for prepared porous sorbents were investigated and optimized; the isosteric heat of adsorption and adsorption kinetics for the optimized sorbent were further calculated and fitted. When the mass ratio of KOH to SE was 1 : 1, the activation temperature and time were 700 °C and 120 min respectively, and the sorbent of K/SE700(120) showed an adsorption capacity of 1.35 mmol g−1 at 20 °C, which dropped by 2.96% after ten regenerations. The Langmuir adsorption isotherms fitted the adsorption data of K/SE700(120) well, and the isosteric heats of adsorption were 11–13 kJ mol−1, showing the physisorption characteristic. In addition, the good fit of the adsorption data to the Avrami model suggested that there are multiple adsorption routes for K/SE700(120).
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 21
·12997-13002
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IF 4.036
Yue Hou,Cheng-Jie Jiang,Ying Wang,Jing-Wei Zhu,Jia-Xing Lu,Huan Wang
The construction of an efficient catalyst for electrocatalytic reduction of CO2 to high value-added fuels has received extensive attention. Herein, nitrogen-doped mesoporous carbon (NMC) was used to support CuSb to prepare a series of materials for electrocatalytic reduction of CO2 to CH4. The catalytic activity of the composites was significantly improved compared with that of Cu/NMC. In addition, the Cu content also influenced the activity of electrocatalytic CO2 reduction reaction. Among the materials used, the CuSb/NMC-2 (Cu: 5.9 wt%, Sb: 0.49 wt%) catalyst exhibited the best performance for electrocatalytic CO2 reduction, and the faradaic efficiency of CH4 reached 35%, and the total faradaic efficiency of C1–C2 products reached 67%.
研究领域:
材料科学
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电化学
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催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shuai Liu,Mengmeng Jin,Jiaqiang Sun,Yongji Qin,Sanshuang Gao,Yu Chen,Shusheng Zhang,Jun Luo,Xijun Liu
Electrocatalytic CO 2 reduction reaction (CRR), powered by renewable energy sources, is a promising route to address energy and environmental issues. Herein, we fabricate single atomic Fe sites anchored on B and N co-doped carbon (Fe-SA/BNC), which showed excellent CRR activity, achieving a highest Faradaic efficiency of ∼ 94% at −0.7 V versus reversible hydrogen electrode. The performance is much better than that of the B-free sample. Furthermore, an outstanding current density of ∼ 130 mA cm −2 , as well as ∼ 99% Faradaic efficiency, has been achieved using the membrane electrode assembly (MEA). Details of density functional theory (DFT) calculations revealed that the introduction of B was beneficial for the desorption of *CO. The Zn-CO 2 battery was then assembled, which reached a high peak power density of 1.18 mW cm −2 at a current density of 4 mA cm −2 , as well as showing remarkable stability for CO production.
研究领域:
电化学
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材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Wei Zhou,Mazhar Ahmed Memon,Mengmeng Niu,Xinqiang Fan,Yanan Jiang,Xian Zhang,Yuan Liu
Copper (Cu) based catalysts are frequently used in CO 2 hydrogenation, particularly in reverse water-gas shift (rWGS) and CO 2 -to-methanol reaction. Cu 0 and Cu + are the key species affecting the catalyst performance and product distribution . Therefore, constructing and adjusting Cu 0 /Cu + active pairs is significant for the catalyst design . In this study, Cu 0 /Cu + active pairs are obtained by utilizing the properties of perovskite-type oxides (PTOs). A series of CaTi 1-x Cu x O 3 and Ca 0.8 La 0.2 Ti 1-x Cu x O 3 (x = 0.05, 0.10, 0.15, 0.30, 0.40 and 0.50) were synthesized via citric acid complexing method and part of the Cu species entered the PTOs lattice. After reduction, large Cu particles and highly-dispersed Cu clusters were obtained simultaneously. The dispersed Cu clusters have more interfaces with the PTOs and provide abundant Cu + while large Cu particles tend to aggregate and supply mainly Cu 0 . Cu 0 activates H 2 and CO 2 and plays a vital role in the rWGS reaction . Cu + is the active site for methanol synthesis and it can strongly absorb CO. The ratio of Cu 0 /Cu + varies with different Cu content and doping La can also adjust the chemical state of surface Cu. The performance test demonstrates that both excessively high and low Cu 0 /Cu + ratios are beneficial for CO generation, while a moderate ratio is suitable for methanol synthesis . These insights provide a method for regulating the chemical state of surface metal species and help the catalyst design for CO 2 hydrogenation.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
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IF 8.097
Ebrahim Ataeivarjovi,Zhigang Tang,Jian Chen
In this present work, a novel approach has been proposed by which a solvent absorption and membrane desorption methods can significantly reduce the carbon dioxide (CO2) emission and energy consumption. In this method, the CO2 capture processing is based on the combination of membrane and physical solvent. Here, dimethyl carbonate and polydimethylsiloxane (PDMS)–SiO2 nanocomposite were used as the physical solvent and desorption membrane, respectively. However, the main focus of this research was on the CO2 desorption behavior of PDMS–SiO2 hybrid membrane. To do so, the influence of the operating conditions and membrane properties on the pervaporation process to capture CO2 have been investigated. The PDMS–SiO2 hybrid membrane containing 10 wt % SiO2 was the most effective membrane. Results revealed that increase in CO2 concentration from 1.5 to 3 wt % led to decrease in the selectivity from 94 to 47 and increase in flux from 1.7 to 5.38 (kg/m2·h). In addition, an increase in temperature increased the flux and reached the highest level (8.17 kg/m2·h) at 40 °C. However, the selectivity decreased to 36.13. It was found that the addition of SiO2 nanoparticles to the PDMS membrane not only enhanced the membrane performance but also decreased the energy consumption about 75% compared with gas stripping method and mass transfer about 49% compared with pure PDMS membrane. Finally, these results illustrated that such a novel technique used for pervaporation separation process is a green and promising alternative to separate CO2 from the physical solvent.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Junjie Wang,Zhao Li,Zhaozhao Zhu,Jinxia Jiang,Yulan Li,Jinju Chen,Xiaobin Niu,Jun Song Chen,Rui Wu
Electrocatalytic CO 2 reduction into CO has been regarded as one of the most promising strategies for sustainable carbon cycles at ambient conditions, but still faces challenges to achieve both high product selectivity and large current density. Here, we report a Ni 4 N/Ni 3 ZnC 0.7 heterostructured electrocatalyst embedded in accordion-like N-doped carbon through a simple molten salt annealing strategy. The optimal Ni 4 N/Ni 3 ZnC 0.7 electrocatalyst achieves a high CO Faraday efficiency of 92.3% and a large total current density of −15.8 mA cm −2 at −0.8 V versus reversible hydrogen electrode, together with a long-term stability about 30 h. Density functional theory results reveal that the energy barrier for *COOH intermediate formation largely decreased on Ni 4 N/Ni 3 ZnC 0.7 heterostructure compared with Ni 4 N and Ni 3 ZnC 0.7 , thus giving rise to enhanced activity and selectivity. A rechargeable Zn-CO 2 battery is further assembled with Ni 4 N/Ni 3 ZnC 0.7 catalyst as the cathode, which shows a maximum power density of 0.85 mW cm −2 and excellent stability.
研究领域:
材料科学
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电化学
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催化
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 6
·3232-3236
·
IF 1.093
Peng Mingyue,Ci Suqin,Shao Ping,Cai Pingwei,Wen Zhenhai
Exploiting effective electrocatalysts toward electrochemical conversion of CO2 into valued-added chemicals is highly desirable for achieving the global carbon cycle. In this work, we report the synthesis of Cu3P/C nanocomposites by phosphatizing the copper-based
metal organic framework precursor. Systematic electrochemical characterizations demonstrate the Cu3P/C nanocomposites hold high activity and favorable selectivity towards CO2 reduction reaction (CO2RR) into CO, as manifested by an onset potential is about −0.25
V versus reversible hydrogen electrode (RHE) and a faradic efficiency (FE) of 47% for CO production at a relatively low potential (−0.3 V). The attractive catalytic properties might be attributed to the synergistic effect of cooper and phosphorus elements, as well as the unique structure
of Cu3P. Furthermore, we propose an asymmetrical-electrolyte Zn–CO2 battery with the Cu3P/C as cathode catalyst, demonstrating a decent performance with an open-circuit voltage of 1.5 V and a power density of 2.6 mW cm−2 (at 10 mA cm−2).
研究领域:
材料科学
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电化学
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能源转换技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Li Hao-Nan,Sun Ze-Yu,Yu Zhen-Jie,Man Kexin,Zhang Chao,Xu Zhi-Kang
Mixed matrix membranes (MMMs) capable of breaking the permeability-selectivity trade-off suffer from the inefficient and disconnected bulky transport channels as well as inferior interfacial compatibility between nanomaterials and polymers. Herein, we propose an original photothermal-triggered in-situ gelation approach to elaborate an original class of MMMs, termed nanofiber-interwoven gel membranes (NIGMs) that feature tunable 3D-interconnected ultrafast transport channels and highly-selective CO 2 -philic gel for boosting CO 2 separation performance. The key design of NIGMs lies in leveraging dual functions of CNT-interwoven skeleton: (1) serving as a photothermal confined reactor that rapidly triggers in-situ gelation of highly-selective CO 2 -philic gel without phase separation-induced interfacial defects to construct defect-free and thickness-controllable NIGMs; (2) functioning as a 3D-interconnected continuous skeleton for providing ultrafast CO 2 transport channels. By orchestrating the distribution and configuration of interwoven nanofibers, the NIGMs possess a boosted CO 2 permeance of 211.0 GPU increased by 1558% over polymeric gel counterparts and an ultrahigh CO 2 /N 2 and CO 2 /CH 4 selectivity of up to 151 and 47 respectively. Our work offers a paradigm shift in developing advanced MMMs beyond gas separation.
研究领域:
材料科学
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化学工程
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膜技术
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气体分离
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Sachin Mane,Yu-Xia Li,Xiao-Qin Liu,Lin-Bing Sun
The use of porous carbons for selective CO2 separation attracts increasing attention. Owing to low thermostability of porous polymers, low yield is the major concern of porous carbons. To obtain porous carbons with high yield, the development of thermostable porous polymers is highly expected. Herein, high yielded (70% for 700 °C and 64% for 800 °C) Sn-doped porous carbons (SnPCs) have been constructed through KOH-assisted carbonization of Sn-containing polymer. Notably, SnPC-700 (218.5 mg·g–1) demonstrates higher CO2 adsorption capacity than the reference sample prepared without KOH, SnPC-700r (188.3 mg·g–1), indicating the importance of KOH-assisted activation. Carbonization temperature has an effect on the adsorption capacity of resultant materials, and high carbonization temperature leads to better adsorption capacity on CO2. SnPC-800 is able to capture 242.8 mg·g–1 of CO2, which is better than some benchmarks including BILP-7 (193.0 mg·g–1), PAF-1–450 (196.4 mg·g–1), and FCTF-1 (205.5 mg·g–1). More importantly, SnPC-800 demonstrates good selectivity of CO2 over CH4 (31.1). Thus, high yield and good performance upon CO2 adsorption capacity and selectivity over CH4 make SnPCs attractive candidates for the removal of CO2 from natural gas.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jiaojiao Fang,Jiaqi Li,Yukai Chen,Jiale Cheng,Chengyang Zhu,Junjie Mao
CO2-selective photoreduction to value-added products is ideal, but its practical application suffers from weak photogenerated carrier separation and insufficient multielectron transport. Herein, we constructed the tricomponent AuNPs@SnO2–AuNCs hybrid by decorating Au nanoclusters (AuNCs) on the Au nanoparticle (AuNPs)@SnO2 core–shell structure. AuNC–NP dual coupling endowed AuNPs@SnO2–AuNCs with an excellent CO yield of 64.8 μmol g–1 h–1 during CO2 photoreduction, which was higher than the role of separate application of AuNCs (25.3 μmol g–1 h–1) and AuNPs (16.0 μmol g–1 h–1). It was mainly attributed that the coaction of AuNPs and AuNCs not only enhanced the visible light absorption capacity but also improved the photogenerated carrier separation/migration. As a result, the electron-rich AuNCs induced from plasmonic AuNPs and photoexcited SnO2 promoted the photocatalytic CO2-to-CO performance. This work provides a new perspective to design multicomponent photocatalysts for highly efficient CO2 conversion.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 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）