JOURNAL OF POROUS MATERIALS
·
2026
·
IF 3.2
Yang Liudong,Liu Li,Li Qunyan,Liu Junguo,Jing Ke,Wei Qi,Chen Wenjuan
Nitrogen-doped micro-mesoporous carbon nanospheres are considered as promising CO₂ adsorbents due to their remarkable efficiency and cost-effectiveness. In this work, nitrogen-doped micro-mesoporous carbon nanospheres were constructed, during which soft micelles (triblock copolymer P123) and a hard template (silica sol) as structural precursors were employed, and urea was used as the nitrogen source and KHCO₃ as the chemical activator. Through a combined chemical activation and post-doping strategy, ultra-micropores were successfully introduced into the carbon framework alongside rich nitrogen doping. The final nitrogen-doped micro-mesoporous carbon nanospheres exhibit high specific surface areas (529–2225 m²/g) and nitrogen contents ranging from 2.20 wt% to 6.02 wt%. The optimal sample, NMCNs-2K2U800, demonstrates excellent CO₂ adsorption performance, with capacities of 7.86 mmol/g at 0 ℃ and 4.31 mmol/g at 25 ℃ under 1 bar. This study systematically investigates the effects of activator and nitrogen source on the pore structure, nitrogen speciation, and CO₂ adsorption behavior of carbon materials. Further, a viable strategy for the controlled synthesis of porous carbons and providing valuable insights into the design of high-performance CO₂ adsorbents is provided.
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yingchao Hu,Hongyuan Lu,Zhe Lv,Ming Zhang,Ge Yu
The traditional Li 4 SiO 4 -based CO 2 sorbent pellets prepared from mechanical granulation methods usually presented densified microstructures. Hence, wheat straw, an agricultural waste featured with huge production and low cost, was used as porosity creator to improve the microstructures and CO 2 capture performance of Li 4 SiO 4 pellets. The results indicated that wheat straw effectively enhanced the cyclic CO 2 sorption capacity of the pellets. In particular, 30 wt% wheat straw-templated Li 4 SiO 4 pellets (LA-WS30) exhibited the capacity of ~0.15 g/g that is almost twice as high as that of unmodified pellets. The enriched porosity and improved porous structures resulted from the quick release of burning gases was considered as the main reason for the performance enhancement. In addition, the alkaline (K and Na) salts in wheat straw played a positive role in CO 2 sorption of Li 4 SiO 4 pellets due to the reduced diffusion resistance. However, the pore plugging of residual wheat straw ashes after high-temperature treatment decreased the contact areas and, thus, led to the capacity reduction. To conclude, the comprehensive performance of wheat straw-templated Li 4 SiO 4 pellets is the result of the combined effects of porosity creation, alkali doping and pore plugging by ashes.
研究领域:
材料科学
·
环境工程
·
碳捕集与封存
·
陶瓷
·
吸附材料
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Zeguang Yin,Ke Wang,Pengfei Zhao,Xiaoli Tang
The water hydration and subsequent calcination (denoted as hydration–calcination) technique was used to modify the microstructure of lithium orthosilicate (Li4SiO4) prepared by solid-state reactions. The original and modified Li4SiO4 sorbents were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption, scanning electron microscopy, and thermogravimetric analysis. The cyclic capacity of these sorbents was further examined using a dual fixed-bed reactor. After treatment by water hydration, most of the Li4SiO4 transformed into LiOH and Li2SiO3. Moreover, following subsequent calcination, the sample exhibited a looser structure with a smaller particle size compared with the original Li4SiO4. This favorable structure was responsible for improved CO2 chemisorption properties, as measured by a higher capacity, faster absorption kinetics, and improved stability.
研究领域:
材料科学
·
无机化学
·
能源化学
·
环境化学
·
吸附分离技术
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2011
·
IF 3.673
Shuangjie Yuan,Zhi Wang,Zhihua Qiao,Mingming Wang,Jixiao Wang,Shichang Wang
In this work, the idea of modifying the fixed carrier membrane for CO 2 separation by a cross-linking agent containing carriers to simultaneously improve the CO 2 -induced plasticization resistance, the CO 2 permeance and the CO 2 /N 2 selectivity of the membrane was suggested and confirmed. Polyvinylamine (PVAm), a polymer to prepare fixed carrier membrane for CO 2 separation, was synthesized by partial acidic hydrolysis of poly(N-vinylformamide) and further modified by using ethylenediamine (EDA). Elemental analysis, ATR-FTIR, XPS and XRD were employed to characterize the EDA modified PVAm. The result of ATR-FTIR and XPS showed that the EDA can effectively cross-link PVAm by the hydrogen bonds formed between amine groups of EDA and either amine or amide groups in PVAm. The composite membranes were developed by coating the PVAm–EDA mixed solutions with different mass ratio of EDA/PVAm ( m EDA / m PVAm ) on polysulfone (PS) ultrafiltration membrane. The effects of m EDA / m PVAm in coating solution and wet coating thickness on the gas performance of the PVAm–EDA/PS composite membranes were investigated. The PVAm–EDA/PS membrane prepared by using coating solution with proper m EDA / m PVAm (from 1 to 3) showed higher CO 2 permeance and much higher CO 2 /N 2 selectivity as well as better CO 2 -induced plasticization resistance than that of the PVAm/PS membrane. It is attributed to two factors: (1) the densification of polymer matrix by moderate hydrogen bond cross-linking; and (2) the increase of total carrier content in membrane. As CO 2 -induced plasticization resistance improves, the selective layer thickness of the PVAm–EDA/PS membrane can be further reduced to obtain a higher CO 2 permeance and a proper CO 2 /N 2 selectivity simultaneously. For CO 2 /N 2 gas mixture (20/80 by volume), the PVAm–EDA/PS membrane prepared by using coating solution with m EDA / m PVAm of 3 and 50 μm wet coating thickness displayed a CO 2 permeance of 607 GPU and CO 2 /N 2 selectivity of 106 at CO 2 partial pressure of 0.02 MPa. The separation performance stability of the PVAm–EDA/PS membranes was investigated for 300 h and no deterioration in membrane permselectivity was observed. Moreover, the PVAm–EDA/PS membrane had no obvious degradation after exposure to H 2 O-saturated SO 2 of 300,000 ppm h.
研究领域:
高分子科学
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气体分离
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膜技术
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材料化学
·
环境工程
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DOI
高影响因子
APPLIED ENERGY
·
2017
·
IF 7.182
Peng Wang,Yafei Guo,Chuanwen Zhao,Junjie Yan,Ping Lu
Large quantities of wood ashes derived from biomass materials combustion potentially threaten the ecological environment. Recycling of the wood ashes as solid sorbents for pollutants control is an economical and environmentally friendly route. In this work, waste wood ashes (WAs) were modified with tetraethylenepentamine (TEPA), monoethanolamine (MEA), diethanolamine (DEA), polyethyleneimine (PEI), and diethylenetriamine (DETA) to synthesize solid sorbents with enhanced CO 2 capture performances. CO 2 capture behaviors of the synthesized sorbents were tested under 60 °C, 5.0%CO 2 + 5%H 2 O using a fixed-bed reactor, and sorbent regeneration behaviors were evaluated under 120 °C, 10 °C/min and 100%N 2 . The sorbent synthesized of ashes collected from straw-fired power plants modified with TEPA (TEPA-WA-1) is identified as the optimum candidate with superior capability for CO 2 capture and sorbent regeneration. CO 2 capture capacity of TEPA-WA-1 increases first and then decreases with the increase of amine loading. Sufficient amine loading can provide substantive active sites for enhanced CO 2 chemisorption, whereas excessive loading will cause particle aggregation and pore structure blockage and affect its CO 2 capture capacity adversely. The maximum CO 2 capture capacity of 2.02 mmol CO 2 /g is obtained with an amine loading of 45 wt.%. The desired sorbent is demonstrated to be stable during 10 cyclic operations. Moreover, the presence of acid impurities (SO 2 and NO 2 ) exerts negative effect on the cyclic CO 2 capture and sorbent regeneration performances of the synthesized sorbent. It is mainly attributed to sorbent deactivation induced by the formation of byproducts and weakened physical properties for the sorbent exposed in acid impurities.
研究领域:
环境科学
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化学工程
·
能源材料
·
吸附分离
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碳捕集与封存
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资源化利用
·
功能材料
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Shuqing Song,Mingang Zhao,Zheyuan Guo,Yanxiong Ren,Jianyu Wang,Xu Liang,Yunchuan Pu,Shaoyu Wang,Hanze Ma,Xuerui Wang,Guangwei He,Zhongyi Jiang
Mixed matrix composite membranes (MMCMs) hold great potential to realize efficient CO 2 removal from natural gas. However, the reduction of separation performance arising from the interfacial defects, significant plasticization and aging effect in the thin films severely limit their application. Herein, we fabricated a series of polyimide MMCMs with MOF-protruding structure wherein amino-functionalized ZIF-8 nanocrystals nearly penetrate the thin selective layer. Through engineering the interfacial interactions, e.g., covalent or hydrogen bondings , we successfully fabricated defect-free MMCMs with the thickness ranging from 140 to 280 nm. The stronger interfacial interactions eliminate the interfacial defects and restrict the mobility of polymer chains under high pressure. Accordingly, the MMCM displays a high CO 2 permeance of 778 GPU and a CO 2 /CH 4 selectivity of 34 with significantly improved resistance to plasticization and aging. Considering the superior performance, we anticipate our work could provide guidelines on designing advanced MMMs to tackle critical separations.
研究领域:
材料科学
·
膜分离技术
·
高分子化学
·
气体分离
·
能源化工
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DOI
高影响因子
Science China-Chemistry
·
2026
·
IF 9.8
Wang Yi-Rong,Yue Ming,Zhang Jia-Li,Xia Yuan-Sheng,Yang Le,Li Run-Han,Shi Jing-Wen,Li Qi,Chen Yifa,Li Shun-Li,Lan Ya-Qian
The development of electrocatalytic CO 2 reduction reaction (eCO 2 RR) in upgrading CO 2 into valuable products affords a substantially untapped opportunity to simultaneously achieve a circular economy and tackle environmental problems. However, the current challenges of this process lie in the low efficiency of eCO 2 RR, less explored product-upgrading systems, as well as the unmet while key electrocatalysts. Here, we develop a parallel-integrated eCO 2 RR cascade catalysis system based on a kind of covalent organic framework (Bpy-COF-Co) electrocatalyst with mesoporous nanosphere morphology that enables efficient cascade conversion of CO 2 into carbonyl compounds with high yields. In the parallel eCO 2 RR modules, the specially designed Bpy-COF-Co with the advantages of high porosity, mesoporous nanosphere morphology and active Co sites presents a remarkable CO generation rate with a superior FE CO (∼100%) and thus-generated CO can be simultaneously utilized in a series of backend carbonylation reactions ( e.g. , amino-carbonylation, carbonylative Suzuki coupling, alkoxy-carbonylation and phenoxy-carbonylation). Noteworthy, this system can achieve gram-scale generation of valuable products like pesticide diethyltoluamide (1.81 g, 94.7% yield).
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Junpeng Huang,Wenbo Wang,Hongyang Zhou,Yujie Tao,Bin Liu,Guoxing Zhu,Xiaomeng Lv
Electrocatalytic CO 2 -to-methanol (MeOH) is hindered by the low efficiency of single-site catalysts, primarily due to insufficient local concentration of the key ⁎ CO intermediate. This work aims to construct a dual-site catalyst to synergistically boost ⁎ CO generation and its subsequent hydrogenation, thereby enhancing methanol production. Herein, a cooperative interface was designed by integrating single atoms Ni (SAs Ni) for CO 2 -to-CO conversion and amino-functionalized cobalt phthalocyanine (CoPc-NH 2 ) for methanol formation on N-doped carbon nanotubes ((SAs Ni + CoPc-NH 2 )/N-CNT). The dual-site catalyst achieves a remarkable methanol Faradaic efficiency (FE MeOH ) of 48.7% and a total current density of 45.6 mA cm −2 at −1.05 V vs. RHE, outperforming single-component CoPc-NH 2 /N-CNT (FE max = 28.4%) and physically mixed SAs Ni/N-CNT + CoPc-NH 2 /N-CNT (FE max = 30.6%) in an H-cell. A peak FE MeOH of 51.9% and a methanol partial current density of 103.8 mA cm −2 are achieved in a flow cell. When tested in a membrane electrode assembly (MEA) electrolyzer fed with simulated flue gas (10% CO 2 ), the catalyst delivers a current density of 500 mA cm −2 , while maintaining a FE MeOH of 67.1%. In situ attenuated total reflectance–surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) confirms the enhanced surface coverage of ⁎ CO and the emergence of the ⁎ CHO intermediate exclusively on the dual-site interface, revealing a synergistic mechanism wherein SAs Ni sites enrich the local ⁎ CO concentration and adjacent CoPc-NH 2 sites facilitate its selective hydrogenation to methanol. This work provides a catalyst design paradigm for efficient CO 2 -to-methanol conversion and offers fundamental insights into constructing cooperative interfaces for multistep electrocatalytic reactions. Download: Download high-res image (185KB) Download: Download full-size image
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123610
·
IF 7.5
Xiaotong Jiang,Liju Bai,Zixuan Hao,Jianchao Luo,Yaxing Zhang,Wenwei Wu,Can Lv,Mengdie Li,Tejraj M. Aminabhavi,Helei Liu
In continuation of our ongoing studies to explore efficient and stable solvent systems for CO 2 capture, herein a systematic investigation is reported on the absorption-desorption performance, thermal and oxidative degradation of the ternary mixed amine system. Effect of different anti-degradation agents on degradation performance of the system was investigated by investigating absorption and desorption rates. Degradation products and reaction pathways were analyzed via GC-MS technique to show that the ternary system has advantages of fast absorption, high saturated absorption capacity, rapid desorption and complete desorption. Absorption capacity of the system was nearly 7000 mL, while the initial desorption peak rate exceeded 2 mL/s. The absorption-desorption reaction mechanism as well as thermal and oxidative degradation pathways were investigated. By the addition of anti-degradation agent to the mixed solution, thermal and oxidative degradation inhibition was optimal, reducing the thermal degradation rate to 10%. Antioxidant degradation rate decreased by 35% compared to the original system. An excellent mixed amine solution formula with superior comprehensive performance was obtained. The study provided a theoretical basis and technical support for the application of the chosen system in CO 2 capture applications.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.5
Hui Liu,Chao Yuan,Jianfeng Wang,Tongsheng Zhang,Binjie Zhou,Penghao Xin,Suping Cui
Carbon capture with chemical absorption method represents a critical pathway toward carbon neutrality in industry. However, its application faces challenges including high capture energy requirement for CO 2 desorption and limited CO 2 utilization routes. This study employed diethanolamine (DEA) as a CO 2 absorbent to prepare CO 2 –absorbed DEA (termed DEA–CO 2 ) with different CO 2 absorption amount. DEA–CO 2 was employed to modulate cement strength development, bypassing the energy-intensive CO 2 desorption step. Effects of DEA–CO 2 on cement hydration and the microstructure of the hardened cement pastes were investigated to reveal the regulation mechanism by in-situ carbonation. Results demonstrate that DEA-CO 2 additions show the potential to enhance 3d and 28d strength. Optimal performance occurs with 0.15% DEA and 0.22% CO 2 (D0.15%C0.22%), elevating 3d and 28d compressive strength by 15.3% and 29.3%, respectively. The enhancement is attributed to the accelerated hydration of aluminates and silicates by DEA–CO 2 to achieve a more condensed structure. Moreover, carbonation in cement pastes by DEA–CO 2 effectively mitigates the retardation effect of 0.15% DEA on early cement hydration. However, in the presence of DEA–CO 2 , the accelerated reaction of C 3 A with gypsum delays C 3 S hydration, especially for D0.15%C1.32%. It is hypothesized that the precipitated CaCO 3 or CaCO 3 –AFm on the surface of cement particles also inhibits further silicates hydration. Therefore, D0.15%C1.32% reduces the compressive strength before 28d. These results confirm the potential of utilizing DEA–CO 2 without desorption to optimize the strength development of cementitious materials, provided that the CO 2 dosage is carefully controlled.
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Zhen Sun,Chenming Zhou,Teng Wang,Zhixin Gao,Jin Sun,Renquan Hu,Meng Yan,Zhaolin Na,Ran Su,Yong Yang
Photocatalytic CO2 reduction offers a green strategy to alleviate climate change and address the energy crisis. In this work, indium oxysulfide subnanocoils with a thickness of 0.9 nm were successfully synthesized via a facile solvothermal method. Adjusting the sulfur content not only modulates the band structure and energy level positions but also enables precise control over the morphology of the as-prepared products. The optimized indium oxysulfide subnanocoils exhibit excellent photocatalytic activity for CO2 reduction, with a CO evolution rate of 61.731 μmol h–1 g–1, which ranks among the best performances for indium-based materials reported to date. The enhancement of photocatalytic performance can be attributed to the exceptionally high surface atomic exposure ratio of the unique subnanometer coiled structure. Meanwhile, the sulfur substitution-induced S–O coordination significantly reduces the average valence state of indium, narrows the band gap, and improves the reduction capability of photogenerated electrons. This study provides a feasible approach for the development of high-performance subnanoscale photocatalysts for CO2 reduction.
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DOI
PubMed
高影响因子
ENERGY & FUELS
·
2026
·
IF 6
Yanshuang Xiong,Zhiwei Jian,Ian Jimmy Madatta,Yang Liu,Jinrui Ding
Electroreduction of carbon dioxide (CO2) to produce multicarbon products (C2+) holds immense potential for reducing carbon emissions and realizing high-valued CO2 utilization. However, the development of efficient catalysts still remains challenging. Cuprous oxide (Cu2O) has been identified as a promising candidate, yet its C2+ selectivity and stability require further improvement. In this study, we, for the first time, blended Cu2O with cerium oxide (CeOx) nanoparticles, forming a Cu2O/CeOx hybrid catalyst which greatly enhanced the selectivity and durability for C2+ production. The optimized catalyst achieved a remarkable carbon product Faradaic efficiency (FE) of 79.6% and a C2+ product FE of 58% (±2.4%) in an H-type electrolytic cell. Our findings provide a novel strategy for significantly improving the selectivity, efficiency, and catalyst stability of CO2 electroreduction.
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DOI
高影响因子
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