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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RSC Advances
·
2025
·Vol. 15
·期 3
·1658-1664
·
IF 4.6
Xiuping Li,Jiaqi Wang,Bolin Yin,Kaihong Liu,Jingjing Zhao,Bo Jiang,Hexing Li
The hydrogenation of carbon dioxide into profitable chemicals is a viable path toward achieving the objective of carbon neutrality. However, the typical approach for hydrogenation of CO2 heavily relies on thermally driven catalysis at high temperatures, which is not aligned with the goals of carbon neutrality. Thus, there is a critical need to explore new catalytic methods for the high-efficiency conversion of CO2. Herein, we present a new class of catalysts, featuring phosphorus-doped amorphous ruthenium nanoparticles supported on copper nanoparticles, which capitalizes on the plasmonic effects of copper to achieve the photothermal transformation of CO2 to CO within a gas–solid flow system. Our findings indicated that the reaction efficiency in the presence of photothermal energy was over eight times greater than that with thermal energy alone. The catalyst system exhibited nearly 100% selectivity towards CO under mild conditions, with an impressive CO yield of 123.16 mmol g−1 h−1. This study highlights the significant potential of amorphous metal phosphides in photocatalytic CO2 hydrogenation under mild conditions and offers a fresh avenue for the robust catalysis of amorphous materials.
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PubMed
高影响因子
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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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yukai Chen,Yiyi Ji,Ruizhe Wang,Dan Wang,Rulin Dong,Hengming Huang,Jiaojiao Fang
To solve the problems of low utilization over the solar spectrum, elevating the photon absorption efficiency and exploiting long-wavelength photons are of great significance. Herein, a CdSe/polydopamine(PDA)@SiO 2 core–shell opal photonic crystal structure with excellent photothermal effect and photon absorption was fabricated for the first time. The photonic bandgap (PBG) effect and the slow photon effect of the photonic crystal structure helps the absorbing of photons and the photothermal effect of PDA coating shells provides higher reacting temperature for photocatalysis. Consequently, the S2P0 sample (without PDA coating) whose PBG is consistent with the absorption edge of CdSe photocatalyst exhibits a three times higher CO 2 reduction efficiency. Benefited from the photothermal effect of PDA, the S2P20 sample (20% PDA coating) shows a 4.77-fold efficiency than the blank sample, proving the reliability of the design. Moreover, the PDA shells enhance the adhesion for robust photonic crystal films and show other applications in fields like textiles. This work demonstrates a synergistic utilization of photothermal effect and photonic crystal structure for efficient photocatalytic CO 2 reduction and revealing more potential applications.
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DOI
PubMed
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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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Carbon Capture Science & Technology
·
2025
·
IF 10.5
Tingwei Wang,Xuelong Quan,Zhiqiang Sun,Zhao Sun
Excessive CO 2 emissions lead to a gradual increase in global average temperatures and an increased frequency of extreme weather events. Exploiting advanced materials for CO 2 capture has become a key issue of concern to all countries. In this study, a new biomass carbonization strategy, co-modification by H 2 O 2 and KOH, is proposed to prepare microporous biochar from pine sawdust with high CO 2 adsorption capacity. Results indicate that the co-modification strategy can produce biochar with a specific surface area as high as 3522.7 m 2 /g (with a micropore ratio of 90.3%), which increases by 56.7% compared to the biochar produced by biomass carbonization without H 2 O 2 treatment. The adsorption properties of the co-modification-derived biochar are investigated by CO 2 -TPD and TG, and the biochar exhibits a maximum CO 2 adsorption capacity of 6.60 mmol/g at 30°C and retains over 91.2% of this capacity after 10 cycles. It is revealed that H 2 O 2 -KOH modification can significantly promote the physisorption capacity of the biochar, highlighting the enhanced CO 2 capture efficiency due to alkaline hydrogen peroxide treatment on the biochar and its enhancement in CO 2 capture.
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Nano Research
·
2021
·Vol. 14
·期 8
·2831-2836
·
IF 8.897
Mou Shiyong,Li Yonghao,Yue Luchao,Liang Jie,Luo Yonglan,Liu Qian,Li Tingshuai,Lu Siyu,Asiri Abdullah M.,Xiong Xiaoli,Ma Dongwei,Sun Xuping
The advancement of cost-effective and selective electrocatalyst towards CO 2 to CO conversion is crucial for renewable energy conversion and storage, thus to achieve carbon-neutral cycle in a sustainable manner. In this communication, we report that Cu 2 Sb decorated Cu nanowire arrays on Cu foil act as a highly active and selective electrocatalyst for CO 2 to CO conversion. In CO 2 -saturated 0.1 M KHCO 3 , it achieves a high Faraday efficiency (FE) of 86.5% for CO, at −0.90 V vs. reversible hydrogen electrode (RHE). The H 2 /CO ratio is tunable from 0.08:1 to 5.9:1 by adjusting the potential. It is worth noting that HCOO − product was totally suppressed on such catalyst, compared with Sb counterpart. The improving selectivity for CO could be attributed to the bimetallic effect and nanowire arrays structure.
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ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 23
·期 1
·73-85
·
IF 1.87
Hu Hangbiao,Zhang Tao,Yuan Shaojun,Tang Shengwei
Abstract The adsorption performance of multi-walled carbon nanotubes (MWCNTs) towards CO 2 gas was enhanced by covalently grafting of phenylenediamine (PDA) via an activation-grafting process. Different loading amounts were achieved by changing the activation time and the dosage of activating agent. The so-synthesized adsorbents were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Thermogravimetry analysis, Transmission electron microscope, Raman spectroscopy and Nitrogen adsorption–desorption analysis. The CO 2 adsorption properties were studied via static volumetric method. The results indicated that the modification process did not alter the crystal structure, whilst the quantity of defect sites and amorphous structures increased greatly. Moreover, the average pore size after functionalization increased from 9.68 to 23.80 nm. 0.59 mmol·g −1 of CO 2 were captured by aminated MWCNTs at 303.15 K and 200 kPa, while the adsorption capacity of the raw materials was only 0.17 mmol·g −1 under the same conditions. Adsorption–regeneration cycles exhibited the stability of the PDA modified MWCNTs during the prolonged cyclic operations. We found that the adsorption of CO 2 on MWCNTs belonged to physical adsorption and the adsorption behavior of CO 2 on PDA modified MWCNTs was a chemical adsorption. The effective enhancement of the CO 2 capture ability was attributed to the increased number of active sites, which offered stronger interactions with CO 2 after PDA grafting.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
H. Yu,C. Sun,Y. Xuan,K. Zhang,K. Chang
Photocatalytic carbon dioxide (CO 2 ) reduction to valuable chemicals (ethanol) is an ideal way to realize artificial photosynthesis. It is still extremely difficult to achieve the challenge for photocatalytic CO 2 reduction to multi-electronic products (C 2 H 5 OH). Here, we design the SrTiO 3 (La Cr)/Cu @ Ni/TiN (STO/Cu @ Ni/TiN) to realize the high efficiency of photocatalytic CO 2 reduction conversion into ethanol in the absence of sacrificial reagents. Furthermore, we use non-noble metallic materials such as Cu, Ni, and TiN to enhance the plasmonic effect for efficiently capturing solar full-spectrum energy instead of noble metals. Meanwhile, the TPD results show that Cu@Ni nanoparticles can enhance the chemical adsorption of CO 2 molecules. STO/Cu @ Ni/TiN exhibit an optimal ethanol evolution rate of 21.3 μmol/(h·g cat. ) and the ethanol selectivity of 79%, which is the highest value for photocatalytic CO 2 reduction to ethanol, among the best values of our knowledge. Furthermore, the pathway of ethanol is confirmed by density functional theory (DFT) calculations and the 13 C isotope experiment.
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TRANSACTIONS OF TIANJIN UNIVERSITY
·
2018
·Vol. 25
·期 3
·237-244
·
IF 0
Xu Yan,Wang Fan,Hou Qingfeng,Zhao Yujun,Ding Guosheng,Xu Xingguang
In this study, we developed a strategy for using the Scoggins procedure in the synthesis of acetamidines as novel CO 2 -triggered switchable surfactants via acetimidates by effectively tuning the chemical equilibrium. The as-synthesized N ’-alkyl- N , N -diethylacetamidines exhibit excellent CO 2 /N 2 switchability and their bicarbonate salts have the ability to emulsify oil–water mixtures.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Kewei Liu,Zichen Zheng,Jinyong Xu,Chao Zhang
Aimed at the bottleneck problem in conventional gas sensors that the effective detection of CO 2 gas can only be accomplished at concentrations above thousands of ppm and higher operating temperature, in this work, microstructured ZnSnO 3 equipped with rambutan-like hexahedral features with the hollow interior was successfully synthesized through a facile one-step hydrothermal method. Visible light was utilized as an excitation source to further enhance the sensing property. The investigation elaborated that at optimum hydrothermal time of 16 h, ZnSnO 3 showed a high gas response (~4.65), repeatability, and long-term stability towards 400 ppm CO 2 at room temperature. The response under purple light was 3.5 times higher than that under dark conditions, resulting from photoelectrons' generation. Furthermore, ZnSnO 3 sensor had excellent selectivity to 50 ppm CO 2 . The large specific surface area and abundant oxygen vacancies of ZnSnO 3 contribute to the excellent gas-sensing performance, which addresses the dilemma that it is difficult to break through the energy barrier through surface interaction to impact the band structure and carrier concentration because CO 2 is a non-polar molecule formed by polar bonds. Therefore, ZnSnO 3 is a promising material for the development of devices utilized in medical respiratory detection, agricultural crop growth detection and other fields.
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Nano Research
·
2020
·Vol. 14
·期 3
·730-737
·
IF 8.183
Chen Weiyi,Liu Xueming,Han Bin,Liang Shujie,Deng Hong,Lin Zhang
Converting carbon dioxide (CO 2 ) to diverse value-added products through photocatalysis can validly alleviate the critical issues of greenhouse effect and energy shortages simultaneously. In particular, based on practical considerations, exploring novel catalysts to achieve efficient photoreduction of diluted CO 2 is necessary and urgent. However, this process is extremely challenging owing to the disturbance of competitive adsorption at low CO 2 concentration. Herein, we delicately synthesize oxygen vacancy-laden NiO nanoplatelets (r-NiO) via calcination under Ar protection to reduce diluted CO 2 through visible light irradiation (> 400 nm) assisted by a Ru-based photosensitizer. Benefitting from the strongly CO 2 adsorption energy of oxygen vacancies, which was confirmed by density functional calculations, the r-NiO catalysts exhibit higher activity and selectivity (6.28 × 10 3 µmol·h − 1·g −1 ; 82.11%) for diluted CO 2 -to-CO conversion than that of the normal NiO (3.94 × 10 3 µmol·h −1 ·g −1 ; 65.26%). Besides, the presence of oxygen vacancies can also promote the separation of electron-hole pairs. Our research demonstrates that oxygen vacancies could act as promising candidates for photocatalytic CO 2 reduction, offering fundamental guidance for the actual photoreduction of diluted CO 2 in the future.
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