Phung Thi Lan, Vu Tran The Hien, Phan Đinh Khanh Nguyen, Le Minh Cam
Biochar was synthesized from banana peels using the pyrolysis method in a nitrogen gas environment. The pyrolysis temperature ranged from 100°C to 500°C with a heating rate of 5°C per minute and a pyrolysis time of 1.5 hours. The influence of the pyrolysis temperature on the acid-base properties of the biochar surface was evaluated through characteristic SEM and BET measurements. Boehm titration showed a gradual decrease in the total acid functional groups and an increase in the total base functional groups with the increasing pyrolysis temperature. Methylene Blue (MB) was used as a model substance to investigate the adsorption properties of the synthesized biochar. The Langmuir and Freundlich models were employed to describe the adsorption equilibrium. The kinetics of MB adsorption followed a pseudo-second-order kinetic equation. The adsorption capacity of MB by biological charcoal was influenced by the acid-base properties of the material, indicating the impact of the pyrolysis temperature.
在氮气环境中使用热解法从香蕉皮中合成生物炭。热解温度范围为 100°C 至 500°C，加热速度为每分钟 5°C，热解时间为 1.5 小时。热解温度对生物炭表面酸碱性质的影响是通过特征 SEM 和 BET 测量来评估的。波姆滴定显示，随着热解温度的升高，总酸官能团逐渐减少，总碱官能团逐渐增加。用亚甲蓝（MB）作为模型物质来研究合成生物炭的吸附特性。采用 Langmuir 和 Freundlich 模型来描述吸附平衡。甲基溴的吸附动力学遵循伪二阶动力学方程。生物炭对甲基溴的吸附能力受材料酸碱性质的影响，这表明热解温度也有影响。
{"title":"Synthesis and application of biochar from agricultural by-products. Effect of pyrolysis temperature on the acid-base properties of biochar","authors":"Phung Thi Lan, Vu Tran The Hien, Phan Đinh Khanh Nguyen, Le Minh Cam","doi":"10.62239/jca.2024.044","DOIUrl":"https://doi.org/10.62239/jca.2024.044","url":null,"abstract":"Biochar was synthesized from banana peels using the pyrolysis method in a nitrogen gas environment. The pyrolysis temperature ranged from 100°C to 500°C with a heating rate of 5°C per minute and a pyrolysis time of 1.5 hours. The influence of the pyrolysis temperature on the acid-base properties of the biochar surface was evaluated through characteristic SEM and BET measurements. Boehm titration showed a gradual decrease in the total acid functional groups and an increase in the total base functional groups with the increasing pyrolysis temperature. Methylene Blue (MB) was used as a model substance to investigate the adsorption properties of the synthesized biochar. The Langmuir and Freundlich models were employed to describe the adsorption equilibrium. The kinetics of MB adsorption followed a pseudo-second-order kinetic equation. The adsorption capacity of MB by biological charcoal was influenced by the acid-base properties of the material, indicating the impact of the pyrolysis temperature.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"54 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141688336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Duy Khiem Nguyen, Thi Dung Nguyen, Hoang Sinh Le, Duong Duc La, Nguyen Thi Hong Phuong Phuong
We present a method to produce graphene flakes (GFs) from polyethylene terephthalate (PET) bottle wastes by the pyrolysis method using modified bentonite as a catalyst. The as-synthesized GFs are analyzed in terms of crystal phase, morphology, and surface chemistry. The synthesized GFs have a porous, thin, and leaf-like morphology with a length ranging from a few hundred nanometers to a few tens of micrometers. The XRD and FT-IR results confirm the graphitization of PET and the presence of oxygen-containing functional groups on the surface of synthesized GFs. The obtained GFs are used as adsorbents for the removal of methylene blue (MB) from aqueous solution. The effects of various factors including, contact time, pH, and initial MB concentration, on the MB removal efficiency are examined. In addition, the adsorption isotherm models of Langmuir and Freundlich are studied. The best-fitting model is observed with the Freundlich isotherm model.
{"title":"Preparation of graphene from polyethylene terephthalate (PET) bottle wastes and its use for the removal of Methylene blue from aqueous solution","authors":"Duy Khiem Nguyen, Thi Dung Nguyen, Hoang Sinh Le, Duong Duc La, Nguyen Thi Hong Phuong Phuong","doi":"10.62239/jca.2024.030","DOIUrl":"https://doi.org/10.62239/jca.2024.030","url":null,"abstract":"We present a method to produce graphene flakes (GFs) from polyethylene terephthalate (PET) bottle wastes by the pyrolysis method using modified bentonite as a catalyst. The as-synthesized GFs are analyzed in terms of crystal phase, morphology, and surface chemistry. The synthesized GFs have a porous, thin, and leaf-like morphology with a length ranging from a few hundred nanometers to a few tens of micrometers. The XRD and FT-IR results confirm the graphitization of PET and the presence of oxygen-containing functional groups on the surface of synthesized GFs. The obtained GFs are used as adsorbents for the removal of methylene blue (MB) from aqueous solution. The effects of various factors including, contact time, pH, and initial MB concentration, on the MB removal efficiency are examined. In addition, the adsorption isotherm models of Langmuir and Freundlich are studied. The best-fitting model is observed with the Freundlich isotherm model.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"30 34","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141684351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, Ag/CuO nanomaterials were prepared via hydrothermal method combined with chemical reduction and used as catalysts in the reduction of 4-nitrophenol. Kinetic study of 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP) by sodium borohydride revealed a first order reaction. The reaction rate constant k increased with amount of silver crystals introduced into CuO nanosheets, with Ag/CuO catalyst concentrations and with temperature. The thermodynamic activation parameters such as activation energy (Ea), enthalpy of activation (∆H#), entropy (∆S#) and Gibbs energy (∆G#) of activation were determined. The value of Ea, ∆H#, ∆S# and ∆G# were 72,33 kJ/mol, –69,86 kJ/mol, –24,28 J/K.mol and –62,50 kJ/mol (303K), respectivement. Ethanol and isopropanol were able to inhibit the 4-NP reduction with NaBH4 in the presence of Ag/CuO catalyst.
{"title":"Kinetics of 4‑nitrophenol reduction with NaBH4 over Ag/CuO nanomaterial catalyst","authors":"Nguyen Le My Linh, Dang Thi Thanh Nhan","doi":"10.62239/jca.2023.079","DOIUrl":"https://doi.org/10.62239/jca.2023.079","url":null,"abstract":"In this paper, Ag/CuO nanomaterials were prepared via hydrothermal method combined with chemical reduction and used as catalysts in the reduction of 4-nitrophenol. Kinetic study of 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP) by sodium borohydride revealed a first order reaction. The reaction rate constant k increased with amount of silver crystals introduced into CuO nanosheets, with Ag/CuO catalyst concentrations and with temperature. The thermodynamic activation parameters such as activation energy (Ea), enthalpy of activation (∆H#), entropy (∆S#) and Gibbs energy (∆G#) of activation were determined. The value of Ea, ∆H#, ∆S# and ∆G# were 72,33 kJ/mol, –69,86 kJ/mol, –24,28 J/K.mol and –62,50 kJ/mol (303K), respectivement. Ethanol and isopropanol were able to inhibit the 4-NP reduction with NaBH4 in the presence of Ag/CuO catalyst.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"201 S601","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Le Thi Phuong Thao, Vo Thi Hanh, Bui Hoang Bac, Tran Thi Thu Huong, Chu Minh Hieu, Nguyen Ngoc Tinh, Nguyen Thi Phuong, Le Thi Duyen
This paper presents the results of research on the adsorption capacity of La3+ ions from aqueous solution of nanotube-type halloysite. The influence of operational conditions such as contact time, initial concentration of La3+, initial pH of solution, halloysite mass and temperature on the adsorption of La3+ had also been examined. The results show that the optimal efficiency and adsorption capacity of La3+ reached 90.19% and 3.76 mg/g in the suitable conditions: haloysite mass 0.6 g/50 mL solution, initial La3+ ion concentration 50 mg/L, pH 5.8, contact time 60 minutes at room temperature (25oC). The adsorption isotherm was studied based on both Langmuir and Freundlich models. The adsorption kinetics were studied by both pseudo-first-order and pseudo-second-order kinetic models. These results open up prospects for the application of haloysite clay minerals to remove and recover La in polluted water.
{"title":"Adsorption properties of nanotube type halloysite clay mineral for La3+ ions","authors":"Le Thi Phuong Thao, Vo Thi Hanh, Bui Hoang Bac, Tran Thi Thu Huong, Chu Minh Hieu, Nguyen Ngoc Tinh, Nguyen Thi Phuong, Le Thi Duyen","doi":"10.62239/jca.2023.067","DOIUrl":"https://doi.org/10.62239/jca.2023.067","url":null,"abstract":"This paper presents the results of research on the adsorption capacity of La3+ ions from aqueous solution of nanotube-type halloysite. The influence of operational conditions such as contact time, initial concentration of La3+, initial pH of solution, halloysite mass and temperature on the adsorption of La3+ had also been examined. The results show that the optimal efficiency and adsorption capacity of La3+ reached 90.19% and 3.76 mg/g in the suitable conditions: haloysite mass 0.6 g/50 mL solution, initial La3+ ion concentration 50 mg/L, pH 5.8, contact time 60 minutes at room temperature (25oC). The adsorption isotherm was studied based on both Langmuir and Freundlich models. The adsorption kinetics were studied by both pseudo-first-order and pseudo-second-order kinetic models. These results open up prospects for the application of haloysite clay minerals to remove and recover La in polluted water.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"154 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dao Van Hien, Tran Thi Huong, Nguyen Thi Mai, Nguyen Thi Anh Tuyet, Dang Van Thanh, Pham Van Hao, Tran Thi Minh Hang, Nguyen Manh Khai
The adsorbent based electroplating sludge and rice husk char (CR) was prepared by ultrasonication method for adsorption of methylene blue (MB) and Ciprofloxacin (CIP) in water. The characteristics of adsorbent such as surface morphology, specific surface area, functional groups, element components was confirmed by SEM, BET, FT-IR, XRD and EDX. The results showed the adsorbent is porous structure with BET surface area of 175.22 m2/g, most of pore width belonged meso section. Removal effectiveness of MB and CIP were 99.89% and 74.96%, respectively after 90 min of adsorption. The experiment was implemented with the mockup model containing of methylene blue and ciprofloxacin in NH3.
{"title":"A novel adsorbent based electroplating sludge – rice husk char for removal of methylene blue and ciprofloxacin in aqueous solution","authors":"Dao Van Hien, Tran Thi Huong, Nguyen Thi Mai, Nguyen Thi Anh Tuyet, Dang Van Thanh, Pham Van Hao, Tran Thi Minh Hang, Nguyen Manh Khai","doi":"10.62239/jca.2023.069","DOIUrl":"https://doi.org/10.62239/jca.2023.069","url":null,"abstract":"The adsorbent based electroplating sludge and rice husk char (CR) was prepared by ultrasonication method for adsorption of methylene blue (MB) and Ciprofloxacin (CIP) in water. The characteristics of adsorbent such as surface morphology, specific surface area, functional groups, element components was confirmed by SEM, BET, FT-IR, XRD and EDX. The results showed the adsorbent is porous structure with BET surface area of 175.22 m2/g, most of pore width belonged meso section. Removal effectiveness of MB and CIP were 99.89% and 74.96%, respectively after 90 min of adsorption. The experiment was implemented with the mockup model containing of methylene blue and ciprofloxacin in NH3.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"274 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140255815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, a novel functionalization protocol of highly oriented pyrolytic graphite (HOPG) was proposed, in which a two dimensional (2D) porous network formed by alkoxy-substituted dehydrobenzo[12]annulene (DBA-OC12) was served as a sacrificial template for electrografting of 3,5-terbutyl diazonium (3,5-TBD). The 2D DBA-OC12 porous network was synthesized by drop-casting of the corresponding precursor followed by a drying process. The structural and electrochemical properties of pristine as well as functionalized HOPG surfaces were investigated by means of cyclic voltammetry (CV) and scanning tunneling microscopy (STM).
{"title":"Graphite surface modification by quasi-periodically structured diazonium monolayer","authors":"Huynh Thi Mien Trung, Phan Thanh Hai","doi":"10.62239/jca.2023.073","DOIUrl":"https://doi.org/10.62239/jca.2023.073","url":null,"abstract":"In this study, a novel functionalization protocol of highly oriented pyrolytic graphite (HOPG) was proposed, in which a two dimensional (2D) porous network formed by alkoxy-substituted dehydrobenzo[12]annulene (DBA-OC12) was served as a sacrificial template for electrografting of 3,5-terbutyl diazonium (3,5-TBD). The 2D DBA-OC12 porous network was synthesized by drop-casting of the corresponding precursor followed by a drying process. The structural and electrochemical properties of pristine as well as functionalized HOPG surfaces were investigated by means of cyclic voltammetry (CV) and scanning tunneling microscopy (STM).","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"193 1‐6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dang Trung Dung, Nguyen Thi Xuan Quynh, Mai Tien Dat, Nguyen Thi Anh Thu, Nguyen Thanh Tung, Tran Van Chinh, Nguyen Thi Giang, La Duc Duong
In the current environmental pollution situation, using green fuel sources such as H2 gas to overcome the challenge of pollution and resource depletion is a useful solution. This research used the acid-base neutralization method with the recombination process to successfully fabricate CuFe2O4/TCPP nanocomposites. The morphological and structural properties of the materials were evaluated by scanning electron microscopy (SEM), X-ray diffraction (XRD) which show that the resulting material has a structure consisting of TCPP filaments with a diameter of about 20-30 nm and a length of µm, interspersed with CuFe2O4 particles with sizes in the range of 100 nm. The electrochemical properties of the as-prepared material film were investigated by Cyclic Voltammetry (CV) and electrochemical impedance spectroscopy (EIS) on a glassy carbon electrode with a 3-electrodes system. The results show the appearance of electrochemical characteristics of copper ferrite/porphyrin hybrid materials and especially the change of electrochemical characteristics when this nanocomposite was irradiated by an external light source. These results are expecting to apply this material in the photocatalytic process to produce green fuel H2 from water.
{"title":"Preparation of nanocomposite material based on Porphyrin and electrochemical analysis for green fuel production","authors":"Dang Trung Dung, Nguyen Thi Xuan Quynh, Mai Tien Dat, Nguyen Thi Anh Thu, Nguyen Thanh Tung, Tran Van Chinh, Nguyen Thi Giang, La Duc Duong","doi":"10.62239/jca.2023.062","DOIUrl":"https://doi.org/10.62239/jca.2023.062","url":null,"abstract":"In the current environmental pollution situation, using green fuel sources such as H2 gas to overcome the challenge of pollution and resource depletion is a useful solution. This research used the acid-base neutralization method with the recombination process to successfully fabricate CuFe2O4/TCPP nanocomposites. The morphological and structural properties of the materials were evaluated by scanning electron microscopy (SEM), X-ray diffraction (XRD) which show that the resulting material has a structure consisting of TCPP filaments with a diameter of about 20-30 nm and a length of µm, interspersed with CuFe2O4 particles with sizes in the range of 100 nm. The electrochemical properties of the as-prepared material film were investigated by Cyclic Voltammetry (CV) and electrochemical impedance spectroscopy (EIS) on a glassy carbon electrode with a 3-electrodes system. The results show the appearance of electrochemical characteristics of copper ferrite/porphyrin hybrid materials and especially the change of electrochemical characteristics when this nanocomposite was irradiated by an external light source. These results are expecting to apply this material in the photocatalytic process to produce green fuel H2 from water.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"191 S529","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this article, AgNPs and MnO2 were successively synthesized on the Graphene oxide (GO) substrate using an in situ method. The AgNPs/MnO2/GO nanocomposite material was modified onto the surface of a glassy carbon electrode (GCE) and the material was electrochemically reduced on the electrode surface. The material obtained after reduction was called AgNPs/MnO2/rGO, which was confirmed by X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) to examine the chemical bonding and by scanning electron microscopy (SEM) combined with energy-dispersive spectroscopy (EDS) to demonstrate the elemental characteristics of the material. In addition, X-ray photoelectron spectroscopy (XPS) analysis was performed to determine the elemental composition, chemical state, and electronic state of the elements on the surface of the material. The application of the reduced material was for the analysis of Piroxicam and Ofloxacin using the differential pulse anodic stripping voltammetry (DP-ASV) method. The investigation of pH and scan rate (v) indicated that the synthesized material had adsorption properties and was applied for the analysis of the anti-inflammatory drug Piroxicam and the antibiotic Ofloxacin.
本文采用原位法在氧化石墨烯（GO）基底上先后合成了 AgNPs 和 MnO2。将 AgNPs/MnO2/GO 纳米复合材料修饰到玻璃碳电极（GCE）表面，并在电极表面进行电化学还原。通过 X 射线衍射（XRD）和傅立叶变换红外光谱（FT-IR）检查化学键，并通过扫描电子显微镜（SEM）结合能量色散光谱（EDS）显示材料的元素特征，证实了还原后得到的材料称为 AgNPs/MnO2/rGO。此外，还进行了 X 射线光电子能谱（XPS）分析，以确定材料表面元素的组成、化学状态和电子状态。还原材料被用于使用差分脉冲阳极剥离伏安法（DP-ASV）分析吡罗昔康和氧氟沙星。对 pH 值和扫描速率 (v) 的研究表明，合成材料具有吸附特性，可用于分析消炎药吡罗昔康和抗生素氧氟沙星。
{"title":"Synthesis of AgNPs/MnO2/rGO composite materials with adsorption properties and their application in analysis of anti-inflammatory and antibiotic agents","authors":"Ho Xuan Anh Vu, Le Trung Hieu, Nguyen Hai Phong","doi":"10.62239/jca.2023.065","DOIUrl":"https://doi.org/10.62239/jca.2023.065","url":null,"abstract":"In this article, AgNPs and MnO2 were successively synthesized on the Graphene oxide (GO) substrate using an in situ method. The AgNPs/MnO2/GO nanocomposite material was modified onto the surface of a glassy carbon electrode (GCE) and the material was electrochemically reduced on the electrode surface. The material obtained after reduction was called AgNPs/MnO2/rGO, which was confirmed by X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) to examine the chemical bonding and by scanning electron microscopy (SEM) combined with energy-dispersive spectroscopy (EDS) to demonstrate the elemental characteristics of the material. In addition, X-ray photoelectron spectroscopy (XPS) analysis was performed to determine the elemental composition, chemical state, and electronic state of the elements on the surface of the material. The application of the reduced material was for the analysis of Piroxicam and Ofloxacin using the differential pulse anodic stripping voltammetry (DP-ASV) method. The investigation of pH and scan rate (v) indicated that the synthesized material had adsorption properties and was applied for the analysis of the anti-inflammatory drug Piroxicam and the antibiotic Ofloxacin.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"202 S609","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MIL-88B(Fe)-NH2 material was prepared by a simple solvothermal method. Various techniques were performed to investigate material characteristics including X-ray diffraction (XRD), scanning electron spectroscopy (SEM), transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET) surface area. The result indicates that the particle shape is a bipyramidal hexagonal prism having a porous surface, and the BET surface area is 13.43 m2/g. Adsorption of congo red (CR) onto MIL-88B(Fe)-NH2 was studied as well. The adsorption equilibrium of the material is reached rapidly after 10 minutes with excellent adsorption efficiency (98.02%). Adsorption kinetic conforms to Langmuir isothermal adsorption model with the high maximum capacity of 333.33 mg/g.
{"title":"Preparation of Metal - Organic Framework MIL-88B(Fe)-NH2 for Efficient Adsorption of Congo Red in Aqueous Environment","authors":"Hoang Thi Linh Giang, Dang Thi Minh Hue, Tran Thi Luyen, Tran Vinh Hoang, Huynh Dang Chinh","doi":"10.62239/jca.2023.063","DOIUrl":"https://doi.org/10.62239/jca.2023.063","url":null,"abstract":"MIL-88B(Fe)-NH2 material was prepared by a simple solvothermal method. Various techniques were performed to investigate material characteristics including X-ray diffraction (XRD), scanning electron spectroscopy (SEM), transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET) surface area. The result indicates that the particle shape is a bipyramidal hexagonal prism having a porous surface, and the BET surface area is 13.43 m2/g. Adsorption of congo red (CR) onto MIL-88B(Fe)-NH2 was studied as well. The adsorption equilibrium of the material is reached rapidly after 10 minutes with excellent adsorption efficiency (98.02%). Adsorption kinetic conforms to Langmuir isothermal adsorption model with the high maximum capacity of 333.33 mg/g.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"189 S517","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ta Ngoc Don, Le Van Duong, Nguyen Thi Hong Phuong, Nguyen Thi Minh Thu, Nguyen Thi Thu Huyen, Ta Ngoc Thien Huy, Nguyen Van Thanh, Danh Mu, Ngu Trong Nghia, Pham Thi Mai Huong, Nguyen Thi Linh, Ha Thi Lan Anh, Bui Thi Thanh Ha, Tran Anh Vy, Trinh Thi Hai
The Me(almIM)2 structural ZIFs are formed from the metal ions Me2+ and the linker 4-methyl-5-imidazolecarboxaldehyde (HalmIM), with the Me–almIM–Me bond angle similar to the Si–O–Si angle in zeolites (145o). Depending on the type of bond formed, Me(almIM)2 material has RHO or SOD structure with good thermal and chemical stability. With pore diameter of about 3.0-3.7 Å connected to large cavities with sizes from 9.1-17.9 Å and a structural frameworks containing two groups –CH3 and –CHO with hydrophilic properties, when the –CHO groups is modified by amine groups through imine condensation reaction, we can create hydrophobic materials for diverse applications in adsorption, separation, sensing, biomedical and catalysis. This review report collects results from more than 100 research papers related to Me(almIM)2 from 2010 to present and provides some recommendations on their synthesis, characterization and application in the future.
{"title":"The Me(almIM)2 structural ZIFs: Synthesis, characterization and application","authors":"Ta Ngoc Don, Le Van Duong, Nguyen Thi Hong Phuong, Nguyen Thi Minh Thu, Nguyen Thi Thu Huyen, Ta Ngoc Thien Huy, Nguyen Van Thanh, Danh Mu, Ngu Trong Nghia, Pham Thi Mai Huong, Nguyen Thi Linh, Ha Thi Lan Anh, Bui Thi Thanh Ha, Tran Anh Vy, Trinh Thi Hai","doi":"10.62239/jca.2023.060","DOIUrl":"https://doi.org/10.62239/jca.2023.060","url":null,"abstract":"The Me(almIM)2 structural ZIFs are formed from the metal ions Me2+ and the linker 4-methyl-5-imidazolecarboxaldehyde (HalmIM), with the Me–almIM–Me bond angle similar to the Si–O–Si angle in zeolites (145o). Depending on the type of bond formed, Me(almIM)2 material has RHO or SOD structure with good thermal and chemical stability.\u0000With pore diameter of about 3.0-3.7 Å connected to large cavities with sizes from 9.1-17.9 Å and a structural frameworks containing two groups –CH3 and –CHO with hydrophilic properties, when the –CHO groups is modified by amine groups through imine condensation reaction, we can create hydrophobic materials for diverse applications in adsorption, separation, sensing, biomedical and catalysis.\u0000This review report collects results from more than 100 research papers related to Me(almIM)2 from 2010 to present and provides some recommendations on their synthesis, characterization and application in the future.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"209 S649","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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