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RISS 인기검색어
- 검색키워드
- 저자 : Shaokun Tang (검색결과 6 건)
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Liwei Sun,Shaokun Tang 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.10
Bi-functionalized ionic liquid (IL) - mesoporous alumina (MA) composite material was synthesized and used for CO2 capture. Ordered mesoporous alumina was synthesized by self-assembly method with aluminum isopropoxide as aluminum source. Then bi-functionalized ionic liquid 1-methoxyethyl-3-methyl imidazole glycinate ([MOEmim][Gly]) was immobilized on mesoporous alumina by ultrasonic-assisted impregnation method. Ordered mesostructure of alumina keeps well in the composite material. Compared with bi-functionalized ionic liquid, thermal stability of the composite material greatly improved. Finally, CO2 capture capacity of IL-MA composite material was studied under different temperatures. On the basis of both capture capacity and capture rate, 40 oC is the optimal temperature. The capture capacity is 1.42mol·mol IL−1 - equivalent to 144mg·g sorbent−1, which is higher than IL or MA alone. Furthermore, the capture capacity of composite material almost maintains constant after eight capture-regeneration cycles.
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Guangtao Li,Liwei Sun,Shaokun Tang 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.4
We propose a new method of resin adsorption (RA) coupled with supercritical fluid elution (SFE) for removal of pesticide residue and recovery of ginsenosides from ginseng extracts. D-101-1 resin was selected as the proper adsorption resin, acetone-n-hexane (4 : 6, v : v) served as the modifier with the flow rate of 1.5mL/min during supercritical CO2 elution of procymidone at 25MPa, 55 oC for 2 h, and absolute ethanol as the modifier at a flow rate of 1mL/min for supercritical CO2 elution of ginsenosides at 20MPa, 60 oC and 1 h. The results showed that the content of procymidone in the final products was only 0.0089mg/kg. Meanwhile, the recovery rate of ginsenosides reached up to 92.5%. RA-SFE procedure provides an efficient approach to remove pesticide residue traces with little loss of active ingredients. The used resin can be recycled without any additional regeneration.
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Liwei Sun,Meilin Yin,Zhen Li,Shaokun Tang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.112 No.-
To alleviate environment issues derived from CO2 emission, developing effective and economical methodsfor CO2 capture has attracted much attention for decades. Metal-organic frameworks possess highporosity and stability, which is favorable to the adsorption of small molecules. Herein, an aluminumbasedMOF, aluminum terephthalate [MIL-53(Al)], was synthesized with H2O and N,N0-dimethylformamide as co-solvent via microwave-assisted method for CO2 adsorption. The parametersincluding pre-mixing mode, microwave temperature, microwave power and reaction time were variedto study their influences on crystal structure, morphology and CO2 adsorption capacity of MW-MIL-53(Al). Wherein, MW-MIL-53(Al) prepared with pre-mixing mode of stirring at 130 C, 200 W and 3 h presentshigh crystallinity and rod-like morphology. The synthesized MW-MIL-53(Al) possesses relativelyhigh BET surface area (961 m2/g), pore volume (0.46 cm3/g) and thermal stability (up to 480 C), andits CO2 adsorption capacity is 2.16 mmol CO2/g adsorbent under 25 C and 0.1 MPa, which is higher thanCS-MIL-53(Al) synthesized via conventional solvothermal method at 130 C for 48 h.
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Jia Chen,Mingming Guan,Kai Li,Shaokun Tang 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-
With well-defined structure and high stability, covalent organic framework (COF) inspires the preparationof new ion-conducting materials for anion exchange membrane (AEM) in alkaline fuel cell. In orderto reveal the influence of micro-nano structure within COF ordered channels on the hydroxide diffusion,we construct a multi-dimensional composite membrane by combining two-dimensional lamellar COFwith one-dimensional polymer chains. The quaternary ammonium-modified COF-LZU1 (QAmCOFLZU1)is incorporated into quaternized poly (2,6-dimethyl-1,4-phenylene oxide) (QAPPO) to fabricateQAmCOF-LZU1/PPO composite membranes. The rapidly diffusion of hydroxide ions in the first solventshell formed by the huge amount of quaternary ammonium groups in the ordered COF channels is investigatedby molecular dynamics simulations. Afterwards, sulfonated graphene oxide (GO) is coated onboth surfaces of the membranes via ionic interactions and p-p interactions to obtain GO@QAmCOFLZU1/PPO sandwich membranes, which would avoid excessive swelling of membranes and leakage ofQA groups. Especially, the GO-sandwiched membrane exhibits strikingly high stabilities and excellentH2/O2 fuel cell performance with a peak power density of 242 mW cm 2 at 60 C. This study providesan effective strategy to construct ion-conducting COF-based composite membranes for highperformancealkaline fuel cell.
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Highly hydroxide-conductive anion exchange membrane with PIL@MOF-assisted ion nanochannels
Jia Chen,Mingming Guan,Kai Li,Shaokun Tang 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-
A highly hydroxide-conducting anion exchange membrane with well-organized multi ion channels werefabricated via incorporating poly ionic liquids modified MIL101 (PIL@MIL101) into imidazolated poly(2,6-dimethyl-1,4-phenylene oxide) (ImPPO). 1-Vinyl-3-ethylimidzolium bromine wasfirst immobilizedin MIL101 cages via supercriticalfluid impregnation method. Afterwards, the rigid-assisted ionnanochannels were constructed by in-situ polymerization of ionic liquids within the long-range orderedpores of MIL101. Meanwhile, PPO was functionalized by 1-ethyl-2-methyimidzolium to prepare combshapedImPPO with enhanced microphase separation structure. Then the PIL@MIL101 was combinedwith ImPPO to fabricate hybrid anion exchange membrane with well-organized multiple ion channels. The OH conductivity of the hybrid membrane significantly reached 138 mS/cm at 80 C (176% higherthan that of pristine membrane). Furthermore, the stability and mechanical properties of the hybridmembranes were remarkably enhanced. The excellent performances render the hybrid membrane a goodcandidate for the application in anion exchange membrane fuel cells.
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Zhen Li,Lili Sun,Jie Zhang,Shaokun Tang 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.12
Zinc oxide was synthesized with ionic liquid tetramethylammonium glycine ([N1111][Gly]) and supramoleculargel N-lauro-L-glutamic acid-di-n-butylamide (GP-1) as co-template by solvothermal method and characterized byX-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-visdiffuse reflectance spectrometer. The effects of templating agent dosage and aging time on the morphology, mesoporousstructure, and crystal phase of ZnO were investigated. The results demonstrate that the ionic liquid [N1111][Gly]and GP-1 organogel synergistically control the growth orientation of the crystal, and the morphology of ZnO varies withthe templating agent dosage and aging time. The as-synthesized samples were applied in the catalytic degradation ofCongo red under simulated solar light irradiation. In particular, the synthesized sample (MZ-3-8) with nanosheets morphologyexhibited the best catalytic performance with a degradation rate up to 98% for 90 min, clearly superior to commercialZnO and P-25. Furthermore, the catalyst can be cycled at least eight times with little loss of photocatalytic activity.
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