CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Hao Liu,Shihai Cao,Liang Chen,Kun Zhao,Chunbo Wang,Mengxin Li,Shigang Shen,Wenjing Wang,Lei Ge
Harvesting value-added products by CO 2 reduction through photocatalysis is a sustainable approach. Against halogen-doping treatment, few-layer iodinene (FLI 2 ) was used innovatively to construct 2D/2D van der Waals heterojunction with carbon nitride nanosheets (CNNS) for CO 2 reduction under visible light irradiation. The photocatalyst achieved an enhanced CO production rate of 34.22 μmol g -1 h −1 , which was 7.76 times as pristine CNNS. Improved activity was attributed to FLI 2 /CNNS maintained tri-s-triazine crystal structure and polymeric framework of CNNS. FLI 2 /CNNS formed a contact interface by van der Waals force, where FLI 2 served as an electron acceptor and CNNS acted as an electron donor, beneficial for electron transfer. This carrier migration tendency in FLI 2 /CNNS was confirmed by the DFT calculation of Fermi level and electron density distribution, which led to increased charge separation and decreased charge recombination. This work proposes the novel 2D/2D FLI 2 /CNNS and highlights the potential of metal-free heterojunction for efficient photocatalysis.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2021
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IF 3.995
Yichen Zhou,Jianhao Qiu,Meili Ding,Xiong-Fei Zhang,Jianfeng Yao
Zeolitic imidazolate framework-8 (ZIF-8) crystals were obtained by an electric current-assisted synthesis method with stoichiometric Zn 2+ and 2-methylimidazole precursors. The resulting ZIF-8-CS2 shows enhanced CO 2 adsorption performance (31.2 cm 3 /g) with CO 2 /N 2 selectivity of 9 at 273 K, while ZIF-8 prepared without electric current assistance shows CO 2 adsorption of 18.4 cm 3 /g and CO 2 /N 2 selectivity of 5. The increased CO 2 adsorption ability is ascribed to the high specific surface area and total pore volume of ZIF-8-CS2.
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FUEL
·
2021
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IF 6.609
Xianglei Liu,Zekai Mu,Chen Sun,Hang Shi,Xianguang Meng,Ping Li,Yueyue Ling,Bo Cheng,Yimin Xuan,Yulong Ding
Solar-driven CO 2 reduction by CH 4 is promising to simultaneously tackle energy shortage and global warming problems by converting two greenhouse gases into fuels. However, serious challenges remain, such as limited light-to-fuel efficiency, high operating temperature, and severe catalyst deactivation. Here, high-performance direct solar-driven CO 2 reduction is demonstrated at relatively low operation temperature (594 °C) based on NiCo-ZIF derived nanostructures. An ultrahigh light-to-fuel efficiency of 32.4% and production rates of H 2 (105.83 min −1 g −1 ) and CO (128.17 mmol min −1 g −1 ) are achieved via photothermocatalysis on Ni 1 Co 2 @C ZIF -Al 2 O 3 catalysts. Excellent light-to-fuel conversion performance can be attributed to the highly dispersed metal particles, decreased apparent activation energy under direct light illumination, increased CO 2 absorption, and promoted dissociation of CH 4 to CH 3 * of NiCo alloy. The carbon deposition rate of NiCo bimetallic catalysts is prominently inhibited compared with pure Ni or Co catalysts due to the change of the reaction path, as confirmed by DFT calculations. This work opens new routes to achieve highly efficient solar-driven CO 2 reduction by CH 4 based on NiCo-ZIF derived alloy nanostructures at relatively low-temperature conditions.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Wei Xie,Yang Jiao,Zhili Cai,Hongyan Liu,Lili Gong,Wei Lai,Linglong Shan,Shuangjiang Luo
This paper reports two new series of benzimidazole functionalized polyimides and ionic polyimides for highly selective membranes with great potential for natural gas sweetening. It has been demonstrated that both the –NH groups in the benzimidazole moieties and the corresponding ionic groups after N -quaternization tighten the microporous structure and restrict polymer chain mobility through hydrogen bonding and electrostatic interaction. The BET surface areas and d -spacing values decrease with benzimidazole molar content or the degree of ionization. Consequently, a linear correlation between CO 2 permeability coefficients with benzimidazole molar content or degree of ionization was observed due to the decrease of CO 2 diffusivity, and the monotonic increase of CO 2 /CH 4 selectivities is ascribed to the increase of both diffusivity selectivity and solubility selectivity. The benzimidazole-based copolyimide and the ionic copolyimide membranes exhibited high CO 2 /CH 4 selectivity under high-pressure mixed-gas conditions. In particular, the copolyimide PI-0.75 membrane displayed a mixed-gas CO 2 permeability of 27 Barrer and CO 2 /CH 4 selectivity of 47 at 20 bar total pressure. The performance was much higher than those of the state-of-the-art commercial cellulose triacetate membranes for natural gas upgrading. The facile polymer synthesis and microporosity tunability, as well as the excellent mixed-gas separation performance, render the copolyimide membranes in this study promising towards economic membrane-mediated natural gas upgrading.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Yuliang Zhao,Hongliang Huang,Hejin Zhu,Chongli Zhong
The covalent triazine frameworks (CTFs) have great application prospects in gas adsorption and separation, pollutant adsorption and heterogeneous catalysis due to their high specific surface area, rich nitrogen content and high physicochemical stability. Moreover, the simultaneous introduction of Lewis acid active sites (cation part) and Lewis base active sites (halogen anion) into the structure of CTFs will not only increase the adsorption capacity of CO 2 , but also greatly improve the catalytic performance of the CO 2 cycloaddition reaction. Herein, two novel cationic CTFs (CCTFs) based on 1,3,5-Tris(4-cyanopyridinium-1-ylmethyl)-benzene tribromide (TPM) were successfully synthesized by using anhydrous ZnCl 2 as a catalyst and reaction medium to force the cyanide group into trimerization. The obtained CTF-TPMs with ample pyridine cationic sites have outstanding chemical and thermal stability even in strong acid and strong base solutions, high specific surface area (up to 1206 m 2 g −1 ) and high CO 2 adsorption capacity (up to 61.4 cc g −1 , at 1 bar and 273 K). In addition, in the absence of co-catalyst and noble metal, CTF-TPMs can synergistically catalyze the cycloaddition of CO 2 with epoxy compounds to form corresponding cyclic carbonates with the synergy effect of the pyridinium salts and halide ions. More importantly, the catalytic performance of CTF-TPMs and their structural framework basically remain unchanged after 5 times recycles, which makes them excellent practical application prospect.
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Journal of Cleaner Production
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2023
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IF 11.1
Xiaoyu Li,Haoran Li,Xueqi Zhao,Yanrong Zhao,Bo Zhang,Keping Zhao,Kang Peng
Amine-impregnated porous solid adsorbents are promising commercial CO 2 capture adsorbents for CO 2 mitigation due to relatively large CO 2 capacity and high CO 2 selectivity . However, the intrinsic viscosity and aggregation of the polyamine leads to low amine efficiency and greatly limits its further development. In this work, a facile and efficient approach was carried out to manipulate the porosity of natural halloysite (HNTs) support with hollow tubular structure and impregnate mixed-polyamines, i.e., both tetraethylenepentamine (TEPA) and diethanolamine (DEA) to synergistically enhance CO 2 adsorption capacity , fast adsorption kinetics and thermal/chemical stability compared to the individual supported TEPA and DEA. The effects of the blend amount for TEPA and DEA, adsorption temperature and CO 2 partial pressure on CO 2 adsorption capacity and adsorption kinetics were specifically discussed. Due to the auxiliary effect of DEA, the chemical reaction between non-hydroxylated TEPA and CO 2 was altered thus improving amine efficiency and the agglomeration layer between protonated TEPA molecules and carbamate, which existed due to electrostatic interaction when TEPA was loaded alone, was loosened thus improving amine efficiency and adsorption kinetics. Therefore, the maximum CO 2 adsorption capacity of MHNTs loaded with 20 wt% TEPA and 20 wt% DEA was 3.25 mmol/g at 75 °C in the flow of 40 vol% N 2 /60 vol% CO 2 . Compared with loading individual TEPA with multiple amino groups on MHNTs, individual DEA with hydroxyl groups could increase the utilization efficiency of the amino groups of TEPA and ultimately obtain excellent CO 2 capture capacity and adsorption kinetics. The experimental results show that the adsorbents obtained in this study using mixed amine impregnated silica nanotubes derived from natural minerals have a promising application in practical CO 2 capture and separation processes.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Shihui Zhang,Chang-an Zhou,Shenghong Wang,Zhifeng Qin,Guoqiang Shu,Chao Wang,Lei Song,Lirong Zheng,Xiaoyang Wei,Kui Ma,Hairong Yue
Selective oxidative dehydrogenation of propane with CO 2 (CO 2 -ODP) represents a promising pathway of propylene production and CO 2 utilization. Presently, vanadium (V) based catalysts are commonly used due to the excellent redox ability originated from the multivalent V. However, the CO 2 -ODP reaction mechanism remains elusive, limiting the rational design of highly efficient catalytic systems. Herein, we introduced Fe into impregnated V-Al 2 O 3 to build a dual-sites catalyst including Fe and V, achieving a C 3 H 8 conversion at ∼43 % and C 3 H 6 selectivity exceed 80 %. Via regulating the Fe/V molar ratio, we clearly describe that the formation of unique Fe-O-V facilitated the CO 2 dissociation. Intrinsically, V is the main active site contributing for C 3 H 8 dehydrogenation while Fe site is responsible for the CO 2 dissociation, replenishing lattice oxygen to enhance oxidative dehydrogenation of C 3 H 8 . The design of dual-sites catalyst and extraction of molecular understanding provide guidance for the rational development of highly active CO 2 -ODP catalysts.
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Molecular Catalysis
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2023
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IF 4.6
Wen Liu,Qian Su,Zhenyang Xu,Mengqian Fu,Heming Zhang,Weiguo Cheng
Non-halogen ionic liquids are considered efficient catalyst for CO 2 conversion into cyclic carbonates. In this work, six carboxylic acid ionic liquids with different types and sizes of cations are designed and synthesized to systematically investigate the catalytic contribution of the non-halogen cation and anion for CO 2 conversion into cyclic carbonate. The result shows that the anion could improve the catalytic activity by improve the basicity of ionic liquids, and the cation that has a weak interaction with anion is more conducive for the reactivity. Further, the reaction mechanism is deeply studied by using the optimized [P 4444 ][IsoNic]: two reaction intermediates are captured by In-situ infrared, combined with DFT calculation, the anion directly inducing ring-opening mechanism is proposed. This work provides an in-depth understanding of catalytic contribution of non-halogen ionic liquids used in cycloaddition reaction.
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CATALYSIS COMMUNICATIONS
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2020
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IF 3.612
Haohua Jin,Jiasheng Wang,Wan-Hui Wang,Yang Li,Ming Bao
The utilization of CO 2 is nowadays important for alleviating energy and environmental crisis. Herein, amino-functionalization was used to improve the performance of SiO 2 -supported Ni-ZnO nanocatalyst for the hydrogenation of sodium bicarbonate to formic acid . The activity, stability and retainability were all improved upon the introduction of amino group. A formic acid yield of 30.4% was obtained from sodium bicarbonate when passing 5 vol% H 2 /N 2 at 70 °C for 4.5 h, which is considered among the best catalytic performances reported under ambient pressure. The simultaneous improvement of the three aspects through a simple operation is attractive in the field of catalysis.
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PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Jingcheng Liu,Jun Hu,Jian Li,Yue Zhang,Xiaojie Li
Two different polyurethane acrylates (PUA) were synthesized from CO 2 -polyol (PPC2000), hydroxyethyl acrylate (HEA), and isophorone diisocyanate (IPDI), or hexamethylene diisocyanate (HMDI). The successful synthesis of the PUA was confirmed with Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance ( 1 H NMR), and gel permeation chromatography (GPC). Then, a series of UV-curable strippable coatings were prepared using the synthesized PUA, photo-initiators and reactive diluents. The mechanical properties , double bond conversion, peel strength of the coatings were characterized. The results revealed that the double bond conversion rate of this series of UV-curable strippable coatings were more than 94 %, and the 180° peel strength of the coating was as high as 2.57 N/cm. In addition, the surface decontamination performance of the different coatings were studied, the results showed that the coatings could remove upwards of 90 % of the contaminants from some of the tested substrates.
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MOLECULES
·
2023
·Vol. 28
·期 23
·7724
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IF 4.6
Ruixi Gao,Bingchen Han,Yanfeng Zeng,Linchuang Shen,Xinqiao Liu,Qiang Wang,Maochuan Liao,Jun Li
Mosla chinensisMaxim is an annual herb with many potential purposes in agricultural, industrial, and pharmaceutical fields. At present, the extract of the whole plant fromM. chinensishas been proven to demonstrate antifungal, antioxidant, and anti-inflammatory activities. Previous studies focused on the enzyme pretreatment in hydrodistillation fromM. chinensis. However, organic solvent or supercritical fluid carbon dioxide extraction (SFE-CO2) methods, which are commonly utilized in industry, have seldom been studied and cannot provide multiple evaluations of yield. In this work, we analysed compounds fromM. chinensisby HPLC–DAD, discussedn-hexane extraction, and conducted further investigations on SFE-CO2through the design of response surface methodology (RSM). The sample obtained from pilot-scale SFE-CO2was also tested against nine kinds of microorganisms. Single-factor results revealed that the extraction rates fromM. chinensisby steam distillation,n-hexane extraction, and SFE-CO2were 1%, 2.09%, and 3.26%, respectively. RSM results showed a significant improvement in extraction rate through optimising pressure and time, and the interaction of both factors was more important than that of temperature–pressure and temperature–time. A pilot-scale test with an extraction rate of 3.34% indicated that the predicted RSM condition was operable. In addition, samples from the pilot-scale SFE-CO2showed antibacterial effects against three previously unreported bacteria (Gardnerella vaginalis, methicillin-resistantStaphylococcus aureus, andPropionibacterium acnes). These results fill the gap in previous research and provide more information for the application and development ofM. chinensisin the future.Keywords:Mosla chinensisMaxim;HPLC–DAD analysis;SFE-CO2;response surface methodology;antibacterial activity
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PubMed
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Science China-Earth Sciences
·
2026
·Vol. 69
·期 10
·3835-3849
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IF 5.5
Liu Haoyang,Li Wei,Zhu Jihao,Lu Jianggu,Wu Tao
Mineral carbonation, which transforms CO 2 into stable carbonates via reaction with Ca- and Mg-silicates, offers a permanent and secure carbon sequestration pathway. Olivine is a highly reactive feedstock, and its carbonation kinetics are known to depend on particle size, CO 2 partial pressure ( \({P_{{\rm CO}_2}}\) ), temperature, and additives. However, two key gaps persist in the current understanding. First, the time-dependent influence of \({P_{{\rm CO}_2}}\) throughout the carbonation process remains unclear. Furthermore, the effect of the grinding method (wet vs. dry) is frequently oversimplified as reducing particle size, neglecting its concurrent alteration of other physicochemical properties. This study systematically addresses these gaps by investigating the carbonation of fine-grained olivine under varied \({P_{{\rm CO}_2}}\) (5–14 MPa) at 185 °C. Reaction progress was tracked in real time using a flush-sampling batch reactor. Our results reveal that the wet-ground olivine, possessing a higher specific surface area (SSA), achieved significantly greater carbonation efficiency compared to the dry-ground sample. Kinetic analysis based on the shrinking core model (SCM) indicates that the formed porous carbonate layer does not act as a diffusion barrier but facilitates the reaction. Increasing \({P_{{\rm CO}_2}}\) significantly enhanced the carbonation rate and final efficiency, with the maximum conversion reaching 98.45% at 14 MPa after 8 h. Furthermore, we identified that the reaction was most sensitive to \({P_{{\rm CO}_2}}\) during the initial stage, with the most pronounced effect observed within the first hour. The primary mechanistic insight is that initial carbonation is predominantly controlled by \({P_{{\rm CO}_2}}\) -driven dissolution, whereas at later stages, the available reactive surface area becomes the limiting factor. This work demonstrates that optimizing both the grinding method (preferring wet grinding for ex-situ applications) and employing elevated \({P_{{\rm CO}_2}}\) (⩾ 8 MPa for in-situ scenarios) are critical strategies for enhancing the efficiency and practical viability of olivine-based CO 2 sequestration.
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