INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2016
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IF 2.567
Tao Wang,Wei Yu,Fei Liu,Mengxiang Fang,Muhammad Farooq,Zhongyang Luo
In this study, three different nanoparticles—SiO2, TiO2, and Al2O3—were employed to enhance the CO2 gas absorption by monoethanolamine (MEA) solvent. It is observed that, with increased solids loading, the total mass-transfer enhancement has a tendency to be dominated by the bubble breaking effect. It is concluded that nanoparticles result in an increased CO2 absorption rate of >10%. On the other hand, nanoparticles exhibit much more attractive impact on CO2 desorption. Under the same desorption extent, solvent with 0.1 wt % TiO2 nanoparticles saved 42% desorption time, compared to that without nanoparticles. Under higher heat flux density, more input heat would be supplied to the heat of desorption, rather than the heat of water evaporation, which is due to the enhancement of desorption rate by nanoparticles. The issue of particle aggregation was also investigated by analyzing the size distribution of nanoparticle clusters and zeta potential of MEA solvents.
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SENSORS AND ACTUATORS B-CHEMICAL
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2015
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IF 4.097
Cheng-Hui Zeng,Xiao-Ting Meng,Song-Song Xu,Li-Jun Han,Shengliang Zhong,Mei-Ye Jia
A rarely reported polymorphic lanthanide complex is prepared by acetylacetone (acac) tuning method. Luminescence properties of 1 are studied. Interestingly, 1 is proved to be a multifunctional material. It is a highly selective and sensitive Co 2+ sensor, among 24 species, only Co 2+ quenching the Tb 3+ centered luminescence. The possible sensing mechanism is the decomposition of 1 which induced by Co 2+ . The limit of detection (LOD) for sensing Co 2+ is as low as 330 nM, which is lower than the standard of Chinese environmental protection department. Mechanism study confirmed the luminescence quenching can be ascribed to the decomposition of 1 which induced by Co 2+ . Further investigations find 1 -Co 2+ can be applied as tunable luminescent timer, by tuning the ratio of 1 /Co 2+ . CIE coordinates of 1 -Co 2+ change regularly (has excellent linearity) from green to violet with the time increasing.
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Small
·
2019
·Vol. 15
·期 49
·1904145
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IF 10.856
Hanqing Lin,Ke Gong,Wen Ying,Danke Chen,Jun Zhang,Youguo Yan,Xinsheng Peng
CO 2 capture and sequestration is an energy-intensive industry to deal with the global greenhouse effect. Membrane separation is considered a cost-effective method to mitigate the emission of CO 2 . Though good separation performance and stability have been reported, supported ionic liquid membranes are still not widely applied for CO 2 separation due to the high cost. As a novel analogous solvent to ionic liquid, deep eutectic solvent retains the excellent merits of ionic liquid and is cheap with facile preparation. Herein, a highly CO 2 -philic separation membrane is constructed by nanoconfining choline chloride/ethylene glycol (ChCl/EG) deep eutectic solvent into graphene oxide nanoslits. Molecular dynamic simulation results indicate that the confinement makes a difference to the structure of the nanoconfined ChCl/EG liquid from their bulk, which remarkably facilitates CO 2 transport. By tuning the molar ratio of ChCl/EG and thickness of the membrane, the resultant membrane exhibits outstanding separation performance for CO 2 with excellent selectivity over other light gases, good long-term durability, and thermal stability. This makes it a promising membrane for selective CO 2 separation.
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Journal of Coatings Technology and Research
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2026
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IF 3.4
Huang Caitong,Xian Wenqi,Cao Hao,Zheng Rui,Zhou Xinyi,Liu Zhu,Lu Ming,Chu Yuehuan,Liu Guocong
Carbon dioxide (CO 2 ), a renewable C1 feedstock, provides a sustainable alternative to fossil-based polymers. While conventional waterborne polyurethanes are well studied, systematic comparisons of cationic, anionic, and nonionic CO 2 -based WPUs with identical soft segments remain underexplored. Here, CO 2 -based polycarbonate diol (PPCD) was used as the soft segment, and three hydrophilic monomers were introduced to synthesize cationic (C-WPU), anionic (A-WPU), and nonionic (NI-WPU) WPUs. Characterizations revealed distinct performance differences: C-WPU showed a mixing region T g of 6.1°C; A-WPU exhibited a T 5 % of 269°C; NI-WPU achieved superior emulsion uniformity, the highest T 5 % (325°C), and crystallinity (48.2%). This work clarifies the hydrophilic monomer–structure–property relationship and offers a systematic benchmark for low-carbon coating design.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jinhang Yang,Yanping Hou,Jiangli Sun,Jingwen Wei,Shiming Zhang,Jiaxiang Liang,Zebin Yu,Hongxiang Zhu,Shuangfei Wang
In this study, biomass-derived carbon quantum dots (CQDs) doped with different nitrogen sources were loaded on Cu 0.05 Zn 2.95 In 2 S 6 (CZIS) to achieve efficient and highly selective CO 2 photocatalytic reduction. Results of various characterizations demonstrated that CZIS@CQDs-T with the highest pyridine nitrogen content (30.4%) exhibited the best light utilization, the most efficient carriers’ separation. In-situ XPS demonstrated that NCQDs were conducive to promoting electron transferred directly from the Zn 3 In 2 S 6 to NCQDs under light illumination. The CZIS@CQDs-T achieved a CO yield of 70.691 μmol·g −1 ·h −1 with selectivity of 100%, and the yield was 4.77 times higher than that of the CZIS. CO 2 -TPD showed that the CZIS@CQDs-T displayed the strongest adsorption capacity for CO 2 , and a weak adsorption capacity for CO. In-situ FTIR analysis showed COOH* was the key intermediates during CO 2 photoreduction process. DFT calculation revealed that the limb-joined pyridine nitrogen of the CZIS had denser charge density when adsorbing CO 2 , and the adsorption energy of CO 2 and desorption energy of CO were significantly enhanced compared with the CZIS. Based on the above analysis, possible pathways and mechanisms of CO 2 reduction were inferred. This study provides inspiration for designing efficient photocatalysts for highly selective reduction of CO 2 .
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SEPARATION AND PURIFICATION TECHNOLOGY
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2019
·
IF 5.107
Hao Ling,Sen Liu,Hongxia Gao,Haiyan Zhang,Zhiwu Liang
In order to establish an integrative mass transfer coefficient (K G a V ) model for CO 2 absorption into blended monoethanolamine (MEA)/1-dimethylamino-2-propanol (1DMA2P) solution in packed column, the models of CO 2 Henry’s law constants (He CO₂-MEA/1DMA2P ) and the equilibrium CO 2 solubility (α eq ) were constructed. The experimental produced data can be reasonably analyzed. In this work, the Arrhenius equation was employed to fit the values of He CO₂-MEA/1DMA2P at different temperature with AARD of 4.06%; the Kent-Eisenberg prediction model and empirical polynomial prediction model were used to predict the data of α eq under different CO 2 partial pressures and temperatures with AARDs of 2.64% and 0.83%, respectively; the empirical K G a V model proposed by Li, the empirical K G a V model proposed by Aroonwilas and new K G a V model were used to correlate the average values of K G a V with AARDs of 14.36%, 12.44% and 9.03%, respectively; the model for outlet CO 2 concentration (y CO₂,out ) in packed column was developed with AARD of 15.97%. Moreover, the heat of CO 2 absorption in 6 kmol/m 3 MEA/1DMA2P solution was estimated by Gibbs-Helmholtz equation which gave a value of −39.8 kJ/mol. The results show that the blended MEA/1DMA2P solution has advantages that make it a potential absorbent for CO 2 capture.
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ACS Catalysis
·
2025
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IF 13.1
Yufeng Li,Jinbiao Yuan,Yunxuan Ji,Siyang Yan,Jiaxu Liu,Bing Liu,Xiaohao Liu
Developing efficient and stable catalysts to convert CO2 to desirable C1 products is of great importance for carbon resource utilization. Cobalt-based catalysts usually show high activity in methanation but poor selectivity to CO from the reverse water-gas shift (RWGS) reaction. Herein, we synthesized In-doped CeO2-supported cobalt catalysts for RWGS reaction, which achieved almost reverse 100% selectivity toward CO with a near-equilibrium CO2 conversion of about 49% at 500 °C and 1 MPa. Results showed that catalyst reduction could result in In species migration onto Co particles to form an InCo alloy, thereby modulating the cobalt electronic structure. It thus strengthened Co–H* bonding but weakened CO adsorption and activation, in turn inhibiting CH4 formation via HCOO* and CO hydrogenation. Interestingly, the reaction temperature-dependent deactivation was observed over 10Co/CeO2, owing to cobalt oxidation determined by the O atom chemical potential (μO). Theoretical investigations demonstrate that μO is related to the free energy of H2O and H2 (μO = GH2O‐GH2), where the reaction temperature exhibits different degrees of effect on GH2OandGH2. Based on the deactivation behavior study, we successfully developed a simple strategy to suppress oxidation deactivation by mixing with hydrophilic H-ZSM-5 zeolite to drive H2O desorption away from the cobalt surface during the CO2 methanation reaction with much more H2O molecules produced.
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ENERGY CONVERSION AND MANAGEMENT
·
2024
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IF 9.9
Si Li,Zhenchong Xiao,Yu Shi,Liang Zhang,Jun Li,Qian Fu,Xun Zhu,Qiang Liao
To realize the utilization of power energy from thermally regenerative batteries and treat flue gas, an eco-friendly coupled system of thermally regenerative battery-driven electrochemical reduction of carbon dioxide is proposed. This system recovers low-grade waste heat for electrical power while in-situ utilization for carbon dioxide reduction. The results show that carbon nanotubes-loaded silver catalyst enhances electrochemical carbon dioxide reduction performance due to increased active sites exposure. Output voltage and maximum power correlate linearly with the number of cell pairs in the thermally regenerative battery stack. Operating with 4 cell pairs, the eco-friendly coupled system achieves an average carbon monoxide Faradaic efficiency of 76.6 % and an average carbon monoxide Faradaic current density of 5.4 mA cm −2 . A minimum of 3 cell pairs is necessary for system operation. The increase of cell pairs in a certain range is beneficial for the performance improvement of electrochemical reduction of carbon dioxide. The eco-friendly coupled system attains an average Faradaic efficiency of 89.4 % and an average carbon monoxide Faradaic current density of 17.8 mA cm −2 with 8 cell pairs. This coupled system indicates a feasible and promising way to simultaneously reduce the emission of low-grade waste heat and carbon dioxide in flue gas without additional inputs.
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Molecular Catalysis
·
2026
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IF 4.3
Minghao Geng,Jiahao Li,Zhengze Li,Meng Sui,Fashe Li,Hua Wang,Zhiyu Hua
Fe-modulated Cu-ZnO CeO 2 catalysts were synthesized via sol-gel method. • Moderate Fe doping suppressed CuO growth and improved Cu dispersion. • Fe tuned the interface and oxygen defects to balance reducibility. • Fe10-CZCe achieved 14.5% CO 2 conversion with high methanol selectivity. • The promotion by Fe stems from interfacial regulation, not new phases. Copper-based catalysts have been widely applied in methanol synthesis from CO 2 hydrogenation. Yet efficient operation at an industrially relevant level remains challenging. The use of CO 2 as a carbon source is still limited by difficult molecular activation and by imperfect interfacial matching. Here, a series of Fe-doped Cu-ZnO CeO 2 catalysts was prepared by a sol-gel route. The influence of Fe content on phase structure, surface electronic environment, reduction behaviour, CO 2 adsorption characteristics and catalytic performance was examined systematically. Fe incorporation did not change the fundamental phase composition of CuO and CeO 2 . It did, however, strongly affect Cu dispersion, the near-surface defect environment of CeO 2 , and the electronic structure of the interface. Moderate Fe addition suppressed CuO crystallite growth, improved Cu dispersion, and produced a more concentrated reduction profile with a more suitable distribution of CO 2 adsorption strength. Excess Fe enhanced defect-related signals and high-temperature adsorption, but also increased interfacial perturbation, which was unfavourable for the further conversion of intermediates. At 3 MPa and 260 °C, Fe10-CZCe showed the best overall performance, giving a CO 2 conversion of 14.5% together with high methanol selectivity and the highest methanol space-time yield. The beneficial role of Fe is therefore linked to reconstruction of the Cu-ZnO CeO 2 interface, which promotes a more effective balance between CO 2 adsorption, activation and hydrogenation. These findings provide a useful perspective for compositional tuning and interface design in Cu-based catalysts. Download: Download high-res image (231KB) Download: Download full-size image
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Materials Research Express
·
2018
·Vol. 5
·期 9
·095305
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IF 1.151
Shicheng Liu,Yiqiang Fan,Kexin Gao,Yajun Zhang
Cyclo-olefin polymer (COP) have unique physical and chemical properties, such as high glass transition temperature, low density, low water absorption, biocompatible and high UV transmission. This study proposed a low-cost and rapid approach for the fabrication of COP-based microfluidic devices using CO2 laser ablation. During the CO2 laser ablation on the surface of COP, the polymer material will meltdown, decompose and evaporate, resulting in a Gaussian-like cross-section profile in micro scale. This study also provided a detailed study for the depth and width of the laser ablated microchannels with various laser energy and scan speed. For the demonstration of the proposed technique, a droplet generator was fabricated and tested in this study. The proposed fabrication method for COP based microfluidic devices is low-cost, rapid, and has a great application prospects in the biological and medical fields.
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ENERGY
·
2026
·
IF 10.1
Lirong Li,Jiaying Wu,Zhiping Xiao,Chengwei Xu,Chuang Meng
The high energy consumption of CO 2 capture technologies stems largely from the limited efficiency of the adsorbents and the energy-intensive regeneration process, posing a major barrier to large-scale deployment. This study provides a robust material solution through the first synthesis and energetic evaluation of a stable CAU-10-PDC metal-organic framework, marking a significant step beyond its previously conceptualized membrane forms. By substituting the original benzene-dicarboxylate linkers in CAU-10 with pyridine-3,5-dicarboxylate ligands, we engineered a framework with tailored 4.15 Å pore channels that exhibits exceptional thermal stability up to 397 °C and a high BET surface area of 896.9 m 2 /g. The material achieves high CO 2 uptake of 5.05 mmol/g at 273 K and 4.01 mmol/g at 298 K, along with outstanding cyclic stability (>99.9% capacity retention over 10 TVSA cycles). Multiscale simulations further reveal a low isosteric enthalpy of 26.25 kJ/mol, confirming an energy-efficient physisorption mechanism. This low regeneration energy requirement, coupled with the identification of preferential CO 2 binding at pyridinic nitrogen sites (binding energy: −8.44 kJ/mol), positions CAU-10-PDC as a promising candidate for next-generation CO 2 capture systems like direct air capture (DAC). Our work provides the first comprehensive dataset for CAU-10-PDC and offers an atomistic blueprint for designing high-performance, low-energy adsorbents.
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TRANSACTIONS OF TIANJIN UNIVERSITY
·
2026
·
IF 7.8
Hao Shengzhong,Yan Xudong,Yin Haochun,Wang Hongqi,Yu Jiaxin,Bai Linlu
The topological nanopores of covalent organic frameworks (COFs) are promising platforms for constructing photocatalytic nanoreactors for CO 2 conversion. However, simultaneously increasing electron density, promoting electron transfer, and enhancing CO 2 adsorption and activation within confined nanopore spaces remain critical challenges for boosting photocatalytic performance. Herein, polyhydroxylated fullerene (C 60 OH) molecules were assembled within the nanopores of a two-dimensional porphyrin-based COF (pCOF) through hydrogen-bonding interactions with the hydroxyl-functionalized 2,5-dihydroxyterephthalaldehyde (DHTA) acceptor units in the pCOF, thereby constructing a C 60 OH@pCOF photocatalytic nanoreactor featuring DHTA–C 60 OH molecular heterojunctions. Under full-light irradiation, the optimized C 60 OH@pCOF achieves a CO production rate of 40.47 μmol/(g·h) in pure water, approximately four times higher than that of pristine pCOF, along with a CO selectivity of 99%. This remarkable enhancement is mainly attributable to the introduction of C 60 OH molecules into the pCOF, which facilitates the directional transfer of photogenerated electrons from the porphyrin donor to the DHTA moieties and then to the C 60 OH acceptor. Moreover, the abundant surface hydroxyl groups on C 60 OH serve as metal-free catalytic sites that effectively activate pre-accumulated CO 2 within the nanopore-based reactor and promote the formation and conversion of key intermediates. This study provides new insights into the design and construction of porous crystalline framework-based photocatalytic nanoreactors.
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