NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 18
·7384-7392
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IF 2.5
Zhaolin Xu,Xiaolong Yang,Senmiao Liu,Bo Wang,Yanhua Peng,Yan Zhang,Zhuo Li
In this study, three preparation methods were used to modify MCM-41 to enhance the CO2 adsorption capability. That is, grafting, impregnation and a two-step method combining the grafting and impregnation. It was demonstrated that amine grafting and subsequent impregnation of MCM-41 significantly enhanced the CO2 adsorption capacity than single amine alone. The maximum adsorption capacity of 5.49 mmol g−1 was obtained on MCM-41 with 1% 3-aminopropyltriethoxysilane (APTES) grafting and subsequent 60% triethylenetetramine (TETA) impregnation (named as M-1AP-60TETA), which also showed good adsorption cycling stability for ten cycles. This was attributed to the synergistic effect of APTES and TETA, where the formation of an intertwined network enhanced CO2 diffusion and carbamate formation.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Wang Yuanfei,Sun Xuewen,Zhang Keliang,Feng Jijun,Sun Xianzhong,Li Chen,Wang Kai,Zhang Xiong,Ma Yanwei
In recent years, the global concentration of greenhouse gases has increased significantly, which has had a great negative impact on the natural environment and human social activities, so it is particularly important to develop efficient carbon capture technologies. Supercapacitive swing adsorption (SSA) is a technique for selective adsorption and desorption of CO 2 through the charging and discharging processes of supercapacitors. In the SSA module, activated carbon (AC) materials characterized by a high specific surface area are commonly employed as both the positive and negative materials, as well as serving as the CO 2 electrochemical adsorption materials. Therefore, it is essential to study the impact of the physicochemical properties of activated carbon on SSA performances. In this work, four types of AC materials utilized as electrode materials for SSA were thoroughly examined. A comprehensive analysis was conducted on their physicochemical characteristics, including specific surface area, porosity, and wettability with the electrolyte. In addition, an experimental flat SSA module was successfully assembled, and the adsorption performances were assessed by monitoring the variations in CO 2 gas concentration. It was found that the specific surface area, porosity, wettability with the electrolyte, and specific capacitance are positively correlated with the adsorption performance. The ABS electrode prepared by DC-10 AC (Dachao Carbon Energy) has the highest BET specific surface area (1614 m 2 g −1 ), the highest pore volume (0.59 cm 3 g −1 ), and the highest specific capacitance (127.19 F g −1 ), and these excellent properties provide it with the highest gravimetric adsorption capacity (20.05 mmol kg −1 ). The findings of this work offer novel perspectives on boosting CO 2 adsorption performance through the enhancement of the physicochemical attributes of adsorption materials.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Zhile Xiong,Yuewen Chen,Weidong Xie,Jiali Huang,Xiaoli Zhang,Xiya Zhang,Hai Liu
The electrocatalytic reduction of CO2 using renewable electricity offers a sustainable approach for the production of valuable chemicals. However, this process is often hindered by low catalytic activity and poor selectivity. In this study, we have developed a novel electrocatalyst that integrates ZIF-8-regulated ZnO interfaces, undercoordinated surface sites, and mesoporous nanostructures. This design enabled the ZnO/ZIF-8 catalyst to achieve excellent CO2 conversion performance, with a CO2 Faraday efficiency of more than 91% over the potential range of -1.0 V to -1.6 V and a high current density compared to reversible hydrogen electrodes. At the optimal potential of -1.4 V, the CO Faraday efficiency reaches 95.57%, accompanied by a current density of -8.16 mA/cm2. The porous nature and superior CO2 adsorption ability of the ZIF-8 shell layer foster an optimal setting for CO2 conversion while enhancing the exposure of active sites. Additionally, the synergistic coupling of ZnO and ZIF-8 interfaces fine-tunes the electronic structure of the active sites, thereby enhancing CO2RR efficiency.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Zhiyuan Liu,Qixuan Xiang,Hao Zhang,Xianglong Zhang,Huijun Tan,Yaping Zhao
Mechanochemical ball milling is a straightforward and efficient technology for material synthesis. However, cold welding significantly hampers both the reaction rate and the powder yield of the ball milling process. This study introduces a novel strategy to mitigate cold welding by utilizing supercritical carbon dioxide (SCCO 2 ) as a process control agent. The mechanism by which SCCO 2 inhibits cold welding was elucidated: SCCO 2 reduces surface energy and passivates dangling bonds on the newly exposed surfaces generated by ball milling, thereby preventing undesired re-formation. Building on this approach, a groundbreaking SCCO 2 -driven ball milling (SDBM) method was developed, enabling the one-step, scalable production of 100 g of binary spinel oxide at room temperature within 8 h. Remarkably, the powder yield increases significantly from 13% (conventional ball milling) to 98%. The synthesized spinel oxide exhibits a small particle size, enhanced Mg migration, abundant oxygen vacancies, and high electrochemical performance (385 C/g for MgCo 2 O 4 ). Beyond MgCo 2 O 4 , various binary and ternary spinel oxides were fabricated using SDBM technology. These results highlight the considerable benefits and the universality of SDBM technology in the fabrication of innovative materials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zhicheng Zhang,Wei Zou,Hong Wang,Zhongjie Du,Chen Zhang
A high-performance biomass-based adsorption materials could be the promising trend for CO 2 capture and storage technology. However, the direct application of biomass-based porous materials as a CO 2 adsorbent with enhanced performance is an emerging issue. Herein, a facile synthesis and a biomimetic strategy were combined to prepare amine-functionalized chitosan foam for CO 2 capture, and then a porous biomass is achieved for the application on the environment protection field. Firstly, the chitosan foam was synthesized by the emulsion-templating method at room temperature. Depended on stabilizing n-octane in the chitosan hydrogel with Span 80, a tunable three-dimensional network porous structure was obtained. Subsequently, co -deposition with dopamine (DA) and polyethyleneimine (PEI) was applied to load abundant amine content on the surface of chitosan foam and thereby improving CO 2 adsorption capacity. Finally, the as-prepared amine-functionalized chitosan foam exhibited the impressive adsorption capacity of 3.59 mmol/g at 333 K and atmospheric pressure, and the better adsorption selectivity and stability. The results extend the preparation approach of biomass porous materials, and also its application in CO 2 adsorption technology.
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PubMed
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaoyi Gao,Wufeng Jiang,Bin Xu,Yongsheng Fan,Cong Luo,Fan Wu,Xiaoshan Li,Liqi Zhang
The biphasic amine absorbent upon absorbing CO 2 , separates into CO 2 poor and CO 2 rich phases, making it a third-generation chemical absorbent with energy-saving potential. However, the current method of constructing biphasic amine absorbents involves screening phase separation agents through a large number of experiments, which involves significant amount of trial and error. In this study, a phase separation prediction model was built for CO 2 capture by biphasic amine absorbents for quick screening of phase separation agents. The phase separation of CO 2 absorption by organic amine 2-amino-2-methyl-1-propanol (AMP) using 34 phase separation agents was statistically analyzed based on 14 molecular descriptors of the solvents. The factors influencing the phase separation were thoroughly explored. It is proposed that the relative dielectric constant or molecular polarity index can replace the traditional polarity evaluation index, dipole moment, to better describe the phase separation situation. Additionally, it is found that the ability of phase separation agents to form hydrogen bonds, particularly as a hydrogen bond donor is the determining factor for phase separation to occur. Ultimately, the preferred molecular descriptors are used as predictors, leading to the development of a prediction model for phase separation that achieves high-accuracy predictions solely through theoretical calculation parameters. The model considerably reducing the construction costs of biphasic amine absorbents.
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INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
·
2015
·
IF 3.082
Lei Rao,Zhenzhen Xu,Yongtao Wang,Feng Zhao,Xiaosong Hu,Xiaojun Liao
The objective of this study was to investigate the inactivation of the Bacillus subtilis spores by high pressure CO 2 combined with high temperature (HPCD + HT) and to analyze the clumping effect of the spores on their HPCD + HT resistance. The spores of B . subtilis were subjected to heat at 0.1 MPa and HPCD at 6.5–25 MPa, and 82 °C, 86 °C, and 91 °C for 0–120 min. The spores were effectively inactivated by HPCD + HT, but a protective effect on the spores was also found, which was closely correlated to the pressure, temperature and time. The spores treated by HPCD + HT at 6.5 and 10 MPa exhibited a two-stage inactivation curve of shoulder and log-linear regions whereas the spores at 15–25 MPa exhibited a three-stage inactivation curve of shoulder, log-linear and tailing regions, and these curves were well fitted to the Geeraerd model. Approximately 90% of pyridine-2,6-dicarboxylic acid (DPA) was released after HPCD + HT and the 90% DPA release time depend on the pressure and temperature. Moreover, the spore clumping in suspensions was examined by dynamic light scattering. The particle size of the spore suspensions increased with the increase of pressure, temperature and time, indicating the spore clumping. 0.1% Tween 80 as a surfactant inhibited the spore clumping and increased the inactivation ratio of the spores by HPCD + HT. These results indicated that the spore clumping enhanced the spores' resistance to HPCD + HT and induced a protective effect.
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Materials
·
2024
·Vol. 17
·期 9
·1946
·
IF 3.1
Jing Bao,Yongjun Feng,Yong Pan,Juncheng Jiang
In this paper, two flower-like magnesium silicate nanomaterials were prepared. These and another two commercial magnesium silicate materials were characterized using a scanning electron microscope, the N2adsorption–desorption method, and other methods. The structure–activity relationship between the adsorption performance of these four magnesium silicate materials and their specific surface area, pore size distribution, and pore structure was compared. The results showed that the 3-FMS modified by sodium dodecyl sulfonate (SDS) had the largest specific surface area and pore size, the best adsorption performance, and the largest experimental equilibrium adsorption capacity (qe,exp) for Co2+, reaching 190.01 mg/g, and Cr3+, reaching 208.89 mg/g. The adsorption behavior of the four materials for Co2+and Cr3+both fitted the pseudo-second-order kinetic model and Langmuir adsorption model, indicating that chemical monolayer uniform adsorption was the dominant adsorption process. Among them, the theoretical adsorption capacity (qm) of 3-FMS was the highest, reaching 207.62 mg/g for Co2+and 230.85 mg/g for Cr3+. Through further research, it was found that the four materials mainly removed Co2+and Cr3+through electrostatic adsorption, surface metal ions (Mg2+), and acidic groups (-OH and -SO3H) exchanging with ions in solution. The adsorption performance of two self-made flower-like magnesium silicate materials for Co2+and Cr3+was superior to that of two commercial magnesium silicates.
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Science China-Materials
·
2025
·
IF 7.4
Huang Fuxia,Liu Yifei,Wang Feng,Liu Ya,Guo Liejin
BiOI materials show significant potential for photocatalytic CO 2 reduction, but their limited CO 2 activation and poor charge carrier properties hinder conversion efficiency. In this study, we engineered BiOI-based photocatalysts with abundant crystal defects to enhance performance. X-ray diffraction (XRD), Raman spectroscopy, and high-resolution transmission electron microscopy (HRTEM) revealed lattice distortions and twin crystals in BiOI-LD and BiOI-TC. Ultraviolet-visible spectroscopy, micropore and chemisorption analyses, and photoluminescence spectroscopy demonstrated that crystal defects improved light absorption, CO 2 adsorption, charge transfer efficiency, and carrier lifetime. Electron paramagnetic resonance (EPR) spectroscopy showed increased superoxide radical generation in BiOI-TC, suggesting higher reactivity. Consequently, BiOI achieved a CH 3 CH 2 OH generation rate of 6.2 µmol g −1 h −1 with 100% selectivity. Key intermediates (*CO, *COCO, *CHO, *CH 2 ) for CH 3 CH 2 OH production were identified, and C 2 H 6 formation in BiOI-LD was linked to the generation of *CH 3 .
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Haodong Zhang,Min Chen,Weiming Qian,Jianghao Zhang,Xueyan Chen,Xiaoxiao Qin,Minmin Liang,Changbin Zhang
The hydrogenation of CO2 to produce valuable chemicals through photocatalytic or photothermal technologies represents a viable path toward carbon neutrality. However, typical nanosemiconductor materials, such as TiO2, often exhibit limited activity, necessitating the optimization of their performance as a key research priority. Here, we demonstrate that the size of anatase TiO2 significantly influences its performance in the selective photocatalytic and photothermal reduction of CO2 to CO. The small-sized TiO2 (S-TiO2, 15 nm) exhibits a low CO yield of 32.7 μmol g–1 h–1 and shows almost no photothermal synergy. In contrast, the large-sized TiO2 (L-TiO2, 160 nm) demonstrates a high CO yield of 185.3 μmol g–1 h–1 and significant photothermal synergy, with the CO yield reaching 438.7 μmol g–1 h–1. We reveal that L-TiO2 is well-crystallized and has a higher conduction band position compared to the S-TiO2. This results in a higher charge separation efficiency and more effective photoexcited electrons for CO2 reduction. Additionally, the external heating primarily enhances the charge separation in L-TiO2, significantly improving the conversion of CO2 to CO. This work provides insights into the relationship between the structure and activity of TiO2 in photocatalytic and photothermal CO2 reduction.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Heyang Liu,Shichen Zeng,Zhenyang Li,Da Zhang,Xu Liang,Hanze Ma,Jianyu Wang,Qianfeng Pan,Jinyue Wang,Jingqi Fu,Guangwei He,Zhongyi Jiang
Covalent organic framework (COF) materials exhibit considerable potential for membrane separation applications due to their long-range ordered pore structures, tunable pore chemical microenvironments, and excellent thermochemical stability. However, the intrinsic pore sizes of COF materials often exceed the kinetic diameters of target gas molecules, thereby limiting their efficacy in gas separation. In this study, we present a strategy for the functionalization of ionic COF nanosheets using ionic liquids. The immobilization of ionic liquids within the pores and interlayers of ionic COF nanosheets was accomplished through a straightforward physical blending method, which leverages the electrostatic interactions between the abundant charged groups from the ionic COF nanosheets and the ionic liquids. Subsequently, we prepared CO 2 separation membranes with a thickness of less than 100 nm. The resulting COF membranes demonstrated excellent separation performance with a CO 2 permeance of up to 1116 GPU and a CO 2 /N 2 selectivity of 20.3 as well as good stability. This study offers a simple and effective approach for developing high-performance COF membranes for carbon capture.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Yulin Tan,Ziye Shen,Ying Yang,Huimin Zhang,Yufang Xie,Chenglin Zhang,Yuan Liu,Mingming Chen,Dawei Cao
Heterojunction engineering significantly enhances photocatalytic CO 2 reduction performance. However, a large lattice mismatch in heterostructures hinders photocatalytic reaction by forming extensive grain boundaries, inefficient interfaces, and sluggish interfacial charge transfer. Metal halide perovskites, featuring soft lattices induced by weak ionic metal-halide bonds, offer effective solutions to alleviate such mismatches. Herein, we fabricate BaTiO 3 /CsPbBr 3 photocatalysts with a precisely engineered type-II heterojunction. Notably, the BaTiO 3 /CsPbBr 3 heterostructure achieves a CO formation rate of 17.3 μmol∙g −1 h −1 — 5.2-fold and 2.3-fold higher than pristine BaTiO 3 (3.3 μmol∙g −1 h −1 ) and CsPbBr 3 (7.6 μmol∙g −1 h −1 ), respectively. This improvement stems from the synergistic effect of enhanced light absorption and charge separation. This work provides fundamental insights for developing high-performance heterojunction photocatalysts.
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