JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Xianwei Cai,Weidong Ren,Chang Li,Qingyin Li,Xun Hu
The activation approach plays a critical role in determining the structural properties of activated carbon (AC). In this study, porous activated carbon was prepared from furfural residue through a combined physical-chemical activation using CO 2 and potassium oxalate as co-activators. The results revealed that CO 2 and K 2 C 2 O 4 had a synergistic effect that enhanced the activation efficiency. Compared to single activation, the co-activation markedly increased the specific surface area (1380 m 2 /g) of the resulting AC, although this came at the cost of a reduced solid yield. In addition, the co-activation process boosted the elimination of hydrogen and oxygen from the carbon material, thus impacting the surface functionality. The co-activated sample K 2 C 2 O 4 -CO 2 -800 exhibited superior adsorption performance for phenol, achieving a maximum removal rate of 95%, owing to its well-developed porous structure. Furthermore, it demonstrated good reusability, maintain a 74% removal rate after five cycles. These findings proposed that physical-chemical co-activation is an effective strategy for tuning the porous structure and improving the adsorption performance of activated carbon.
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Industrial Chemistry & Materials
·
2025
·
IF 11.9
Hao-Ling Lan,Su-Tao Zheng,Li Xu,Guowei Guan,Qing-Yuan Yang
The separation of C2H2/CO2 mixtures for acetylene purification presents both industrial significance and fundamental challenges due to their nearly identical kinetic diameters and similar physical properties. This study demonstrates the effectiveness of ultramicroporous metal-organic frameworks (MOFs) in addressing this challenge through precise pore confinement effects. We report two ultramicroporous porous materials: Cu(cyhdc) (cyhdc2- = trans-1,4-cyclohexanedicarboxylate) and Cu(bdc) (bdc2- = 1,4-benzenedicarboxylate) and investigated their performance of capturing C2H2. At ambient conditions, both materials exhibit high C2H2 sorption capacities (1.92mmol g-1 for Cu(cyhdc) and 1.44mmol g-1 for Cu(bdc)). The most promising candidate is Cu(cyhdc), which shows decent C2H2 uptake capacity and a pretty high C2H2/CO2 selectivity (8.45 at 298K and 1 bar). Grand canonical Monte Carlo simulations revealed that the enhanced performance originates from multiple van der Waals interactions between C2H2 molecules and the curved cyclohexane-derived pore walls of Cu(cyhdc). Importantly, dynamic breakthrough experiments and scalable synthesis processes validated the practical separation potential of Cu(cyhdc) for C2H2/CO2 mixtures. This work provides both mechanistic insights into gas-framework interactions and a potential solution for energy-efficient acetylene purification.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
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IF 3.9
Yifei Wang,Yingdong Yang,Yuxing Liu,Xinkang Zhang,Fengming Mo,Tao Huang,Yongjiang Shan,Ting Wu,Fei Zhang,Xiangshu Chen,Hidetoshi Kita
Capturing and recovering CO2 from steel industry gases is essential for environmental preservation since it lowers greenhouse gas emissions and raises CO concentrations. Because of its high selectivity, energy efficiency, and continuous operation, membrane separation technology has a lot of potential for CO2 separation. In the present work, a hydroxyl free radical (•OH), generated by the addition of a small amount of sodium persulfate to the precursor solution, was introduced for the first time to induce the synthesis of the ZSM-58 crystals and membranes. Hydroxyl free radicals can promote the depolymerization and condensation of silica sources during the synthesis process, thereby accelerating nucleation and crystallization. Compared with the precursor solution without sodium persulfate, the synthesis time of the membrane can be reduced by 30%, the resulting zeolite membrane exhibits a CO2/CO separation factor of 16 and a high CO2 permeance of 1.5 × 10–7 mol m–2 s–1 Pa–1. In addition, CO2/N2 and CO2/CH4 separation performances were also tested to evaluate the membrane quality. The separation factor of the equimolar CO2/N2 and equimolar CO2/CH4 mixtures reached 28.6 and 248.3 at 298 K at 0.1 MPa, accompanying the corresponding CO2 permeance of 1.3 × 10–7 mol m–2 s–1 Pa–1 and 1.5 × 10–7 mol m–2 s–1 Pa–1, respectively. This research presents an innovative and effective method for fabricating zeolite membranes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
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IF 9.7
Qiang Fang,Yunzhen Jia,Tao Zhao,Geng Li,Xuelei Lang,Ziyao Yang,Jianjun Ma,Dazhong Zhong,Jinping Li,Qiang Zhao
Acidic electrochemical CO 2 reduction (CO 2 RR) to high-value C 2+ products offers a promising route for CO 2 utilization. However, it still faces severe challenges: competitive hydrogen evolution reaction (HER) and slow C C coupling. To address these issues, we propose a defect engineering strategy by Fe-doped carbon nitride (FeCN) modification to reduce Cu defect formation energy, thereby inducing abundant and stable surface defects. We synthesized a magnetron-sputtered Cu nanoparticle (MSCu) catalyst modified with FeCN (MSCu-FeCN) and evaluated its performance in a membrane electrode assembly (MEA) under acidic conditions. At 500 mA·cm −2 , MSCu-FeCN achieves a remarkable C 2+ Faradaic efficiency (FE) of 73.07 % and a single-pass CO 2 conversion efficiency (SPCE) of 57.30 % with a full-cell voltage of 3.88 V, significantly superior to the original MSCu. Density functional theory (DFT) calculations, cyclic voltammetry curves, and in-situ attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy confirm that FeCN lowers Cu defect formation energy, increases surface defect density, enhances *CO intermediate coverage, thereby promoting C C coupling. This work presents a defect engineering approach enabling high-efficiency acidic CO 2 RR, while providing pivotal insights for industrial-grade electrocatalytic systems.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Zicheng Yang,Ziyang Xu,Jiale Ni,Yi Feng,Jianfeng Yao
Zeolitic imidazolate frameworks (ZIFs), such as ZIF-8, have emerged as promising heterogeneous catalysts for CO 2 fixation, but their direct application suffers from insufficient Lewis acidity and microporosity-limited mass transport. This work addresses these limitations by synthesizing cetyltrimethylammonium bromide (CTAB)-induced ZIF nanowire precursors followed by rapid low-temperature air calcination (350 °C, 10 min) to produce activated ZIF-8 nanowires (ZIF-8 NWs). This treatment transforms the unstable precursor into a robust ZIF-8 structure, significantly increasing the specific surface area (from 211 to 637 m 2 /g), CO 2 uptake (from 20.7 to 29 cm 3 /g) and Lewis acidity. The resulting ZIF-8 NWs exhibit exceptional catalytic performance in the solvent-free cycloaddition of CO 2 with epoxide (89.5 % yield at 10 h under 80 °C and 0.1 MPa), surpassing that of conventional ZIF-8 nanoparticles (36 %) and ZIF-8 nanosheets (48.9 %), highlighting the key role of morphology and acidity in catalytic CO 2 conversion to cyclic carbonates.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Sung-Jun Lee,Kwang-Kyu Lee,Chang-Lae Kim,Dong-Gyu Ahn
This study investigated the synergistic effects of three-dimensional lattice structures and zeolite Y coatings on CO 2 adsorption. Three different lattice geometries (simple cubic, octet, and Weaire-Phelan) were fabricated using fused deposition modeling (FDM) with varying unit cell thicknesses. Six candidate materials were evaluated for CO 2 adsorption capacity, with zeolite powder exhibiting the highest performance at 77.46 cm 3 /g STP. The selected zeolite powder was characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and nitrogen (N 2 ) adsorption-desorption analysis, revealing a Brunauer-Emmett-Teller (BET) surface area of 616.31 m 2 /g with 99.9% micropore contribution. XRD and FTIR analyses confirmed the Y-type zeolite structure with a Si/Al ratio of 1.3. Surface area analysis showed that the octet and Weaire-Phelan structures achieved maximum values of 18,816 mm 2 and 19,088 mm 2 , respectively, at a 2 mm unit cell thickness, representing a three-fold increase compared to that of a solid cube. CO 2 adsorption experiments demonstrated that the Weaire-Phelan structure exhibited the highest adsorption capacity (0.061 g CO 2 /g structure), followed by the octet and simple cubic structures. The 73% desorption efficiency confirmed physisorption-dominated mechanisms suitable for pressure-swing adsorption (PSA) processes. The results established a direct correlation between coating amount and adsorption performance, with lattice geometry playing a critical role in determining coating efficiency even at similar surface areas.
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ACS Sensors
·
2025
·
IF 9.1
Zuorong Huang,Quanquan Tang,Jing He,Lei Wu,Fengmin Liu,Xishuang Liang,Bin Wu,Mingliang Fu,Geyu Lu
Diesel engines in the field of transportation are one of the important sources of carbon dioxide (CO2) emissions, and incomplete combustion and complex working conditions make it difficult to accurately calculate their CO2 emissions by using the intake volume. In addition, the high temperature and harsh environment of exhaust gas also put higher requirements on the response speed, stability, and high-temperature resistance of the sensor. In this study, Co3O4 was doped into the auxiliary phase Na2CO3 as a catalyst and stabilizer to improve the sensor sensitivity, and solid electrolyte NASICON was doped to improve the sensor response speed. The results show that when the doping ratio of Na2CO3 and NASICON is the same as 10 wt %, the response to CO2 of 5000 ppm can reach −67 mV, and the full-range second-level response to CO2 is realized. The detection range is up to 0–180,000 ppm, the sensitivity is −64 mV/decade, the sensor has good selectivity to CO2, the response change in the range of 20–98% RH is negligible, and the response change in 60 days is only −8.66%. This sensor had good reproducibility. In addition, the in situ on-board CO2 sensing probe and test system were developed. The sensor response was calibrated against the measurement values of standard instruments on the entire vehicle. Based on the calibration results, a regression curve was established and the vehicle was tested; the test results and the standard instrument test value deviation are basically less than 10% to verify the practicality of the component in the exhaust gas detection.
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JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Jing Wang,Chengcheng Zhang,Huating Liu,Xusheng Wang,Songtao Zhang,Jinhua Ye,Li Shi
Doping semiconductor quantum dots (QDs) with heteroatoms has emerged as a technologically important tool for tuning their electronic structure and improving their photocatalytic activities; however, the resulting systems still suffer from low efficiency towards photocatalytic CO 2 reduction. Herein, we report that co-doping CdS QDs with Se 2- and Ga 3+ can boost the photocatalytic CO 2 reduction. The achieved CO evolution rate over Ga/Se co-doped CdS QDs is almost 20 times higher than that of pristine CdS QDs, and is also higher than some other reported QDs based photocatalysts for CO 2 photoreduction. The mechanism study uncovers that the co-doping of Se and Ga in CdS QDs can suppress the recombination of photogenerated electron–hole pairs and decrease the formation barrier of the key *COOH intermediate for promoting the CO 2 to CO conversion.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zhihong Liu,Jiale Liu,Jin Wang,Ping Lu,Shishun Xu,Yi Lu,Xiaofei Li,Qiaowen Zhang,Guocan Jiang,Zhengquan Li
The urgent need for clean energy has driven extensive research into efficient photocatalytic systems for CO 2 reduction. Lead-free Cs 3 Bi 2 Br 9 perovskites are particularly promising in this context, yet the photocatalytic performance of single-component Cs 3 Bi 2 Br 9 is often hindered by its narrow absorption in visible-light range. Here, we present a visible-to-near-infrared (vis-to-NIR) responsive Cs 3 Bi 2 Br 9 /Bi 19 Br 3 S 27 Z -scheme heterojunction photocatalyst, achieved by creating a high-quality interface upon in-situ growth. This heterojunction design markedly boosts CO₂-to-methane conversion, achieving electron consumption rates that are 70 and 124 times higher than those of pristine Cs 3 Bi 2 Br 9 and Bi 19 Br 3 S 27 , respectively. Mechanistic studies indicate that the formation of a strong built-in electric field at the interface facilitates efficient charge separation and transfer, significantly boosting photocatalytic performance. Notably, the photocatalytic performance of Cs 3 Bi 2 Br 9 /Bi 19 Br 3 S 27 heterojunction surpasses that of most lead-free halide perovskite photocatalysts. Our findings offer a new paradigm for interface engineering in photocatalysis and advance the development of vis-to-NIR responsive perovskites for sustainable energy conversion.
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FUEL
·
2025
·
IF 7.5
Jingwen Lu,Sheng Su,Zhiwei Ma,Tao Liu,Kai Xu,Jun Xu,Long Jiang,Yi Wang,Song Hu,Jun Xiang
Fly ash (FA) has demonstrated cost-effective potential for CO 2 capture, yet its practical application is hindered by inadequate pore structure and complex processing. Chitosan (CS), a polysaccharide rich in amine groups, offers distinct advantages as it enables straightforward synthesis of adsorbents without requiring high temperature/pressure or templates, and provides regular pores, making it an ideal candidate for modifying FA to enhance its pore structure and streamline the preparation process. Therefore, the adsorbent of polyethyleneimine(PEI)-impregnated FA modified by CS was developed to investigate CO 2 adsorption performance at different conditions. The properties and mechanisms were characterized by XRD, SEM, FT-IR etc. Characterization results revealed that the introduction of CS transformed the irregular macropores of FA adsorbents into ordered three-dimensional networks, significantly improving the pore structure and specific surface area, while introducing amine groups from CS into the adsorbents. The FA/CS 1 -50PEI achieved a maximum CO 2 adsorption capacity of 1.96 mmol/g (40 °C, 100 mL/min and 15 % CO 2 ) in experiments. After 10 adsorption–desorption cycles (40 °C, 200 mL/min and 15 % CO 2 ), it retained 93 % of initial adsorption performance, demonstrating exceptional stability and effectioncy for CO 2 adsorption. DRIFTS analysis confirmed the successful introduction of amine groups from CS, and the appearance of carbamate’s specific peak at different wavenumbers further validated the involvement of amine groups in CS and PEI in the adsorption process. Additionally, adsorption kinetic analysis revealed the adsorption mechanism involved both physisorption and chemisorption. It also confirmed that CS not only provided regular pores for PEI impregnation, but also the amine groups in CS exposed to the pore surface participate in adsorption reaction with the that in PEI.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121498
·
IF 7.5
Qi Jia,Ling Han,Yuqing Niu,Sen Yan,Jingli Zhang,Tao liu,Hui Zhang
This study addresses plastic pollution and climate change by converting waste polyethylene terephthalate (PET) bottles into carbon dioxide (CO 2 ) capture aerogels. Using recycled polyethylene terephthalate (rPET) and chitosan (CS) as raw materials, we prepared a hierarchical porous aerogel through sequential swelling, cross-linking, and freezing of porous nanofibers. The resulting aerogel contains macropores (>50 nm), mesopores (2–50 nm), and micropores (<2 nm). Its CO 2 adsorption abilities was achieved synergistic physical-chemical method after modification with triethylenetetramine (TETA). The designed hierarchical pore structure was meticulously governed by humidity, cross-linking. The optimized aerogel (rPET/CS-2-B) with 9.51 mmol/g amines achieved a high CO 2 uptake of 3.11 mmol/g at 273 K. Under simulated flue gas (15 % CO 2 / 85 % N 2 ), the best-performing sample achieved CO 2 adsorption capacities as high as 2.99 mmol/g under dry conditions and 4.10 mmol/g under humid conditions. This work offers a novel strategy for waste upcycling and designing hierarchical porous materials for carbon capture.
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ChemCatChem
·
2026
·Vol. 18
·期 2
·e01534
·
IF 3.9
Wenbin Huang,Haoran Liu,Han Yang,Zhen Xu,Tianyu Bai,Fan Shao,Yasong Zhou,Qiang Wei
To improve the efficiency of existing Cu-layered double oxide (LDO) catalysts for hydrogenation of CO 2 to methanol, graphene oxide (GO)-doped Cu-LDO/xGO catalysts were successfully prepared by coprecipitation method, and the influence of GO doping on the structure and reaction performance of Cu-LDO catalysts was deeply investigated. Characterizations including XRD, SEM, ICP-OES, N 2 physical adsorption-desorption, TEM, N 2 O chemisorption, H 2 -TPR, and H 2 /CO 2 -TPD reveal that optimal GO loading (2 wt%) promoted the formation of highly dispersed Cu particles and abundant Cu─MgO interfaces, enhancing H 2 adsorption/dissociation and CO 2 activation. The Cu-LDO/2.0GO catalyst achieved a CO 2 conversion of 22.4%, CH 3 OH selectivity of 94.5%, and methanol space-time yield (STY) of 652.1 g·kgcat −1 ·h −1 at 240°C and 2.5 MPa-outperforming the GO-free Cu-LDO/0GO catalyst, and long-term stability tests show that the incorporation of GO mitigated Cu sintering, maintaining catalytic activity over 200 h. The results of structure-activity relationship analysis show that the main reason 2 wt% GO doping significantly improved the activity and stability of the catalyst lies in the synergistic effect: GO improved Cu sites dispersion boosting H 2 activation and Cu─MgO interface formation. Meanwhile, GO can also act as a conductive bridge for H spillover, enabling hydrogenation of formate and other intermediates adsorbed on Cu–MgO interfaces that are not in direct contact with conventional Cu surfaces, potentially involving isolated Cu species. The study establishes that rational GO incorporation optimizes active site utilization, providing a strategy for designing efficient catalysts for CO 2 conversion. Graphical The incorporation of GO enhances the dispersion of the active metal Cu and increases the density of surface base sites in the catalyst, thereby accelerating the rate of methanol production via CO 2 hydrogenation.
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