Lan Nguyen Thi, Trang Phan Thi Thuy, Ha Tran Huu, Huong Nguyen Thi Thanh, Kim Nguyen Van, Thang Nguyen Van, Vien Vo
In this study, banana-peel-derived carbon/g-C3N4 (BC/CN) composite was prepared by a facile calcinating method from the urea (NH2)2CO and banana-peel-derived carbon (BC) precursors. Whereas, the banana-peel-derived carbon was prepared from the waste banana peel as biomass source. The obtained composite was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), and N2 adsorption–desorption isotherms. The results showed that the BC/CN composite had the higher photocatalytic activities in the degradation Rhodamine B (85%) compared to the pristine g-C3N4 (31%) under visible light. This shows that the BC/CN composite as a promising new material with low cost for photodegradation of organic pollutants in wastewater
{"title":"Synthesis of C/g-C3N4 composite with enhanced photocatalytic activity under visible light","authors":"Lan Nguyen Thi, Trang Phan Thi Thuy, Ha Tran Huu, Huong Nguyen Thi Thanh, Kim Nguyen Van, Thang Nguyen Van, Vien Vo","doi":"10.51316/jca.2022.068","DOIUrl":"https://doi.org/10.51316/jca.2022.068","url":null,"abstract":"In this study, banana-peel-derived carbon/g-C3N4 (BC/CN) composite was prepared by a facile calcinating method from the urea (NH2)2CO and banana-peel-derived carbon (BC) precursors. Whereas, the banana-peel-derived carbon was prepared from the waste banana peel as biomass source. The obtained composite was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), and N2 adsorption–desorption isotherms. The results showed that the BC/CN composite had the higher photocatalytic activities in the degradation Rhodamine B (85%) compared to the pristine g-C3N4 (31%) under visible light. This shows that the BC/CN composite as a promising new material with low cost for photodegradation of organic pollutants in wastewater","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78873433","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}
Thao Le thi, Trang Phan Thi Thuy, Phuong Tran Thi Thu, Lan Nguyen Thi, Thang Nguyen Van, Vien Vo
The Ge/C composite was prepared by hydrothermal method using Germani (Ge) and carbon (C) as precursors, in which C was prepared from waste banana peel as biomass source and Ge was obtained from reduction of GeO2 by Mg at 650 oC. The synthesized composite was characterized by X-ray diffraction (XRD), Infrared spectroscopy (IR), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM); and used as lithium ion battery anode material. The results showed that the Ge/C anode exhibited a higher capacity and stablity than those of the pure Ge. This observation can indicate that the Ge/C composite may be a new class of promising negative electrode material for lithium ion batteries in the future.
{"title":"Synthesis of Ge/C composite as an anode material for lithium ion batteries","authors":"Thao Le thi, Trang Phan Thi Thuy, Phuong Tran Thi Thu, Lan Nguyen Thi, Thang Nguyen Van, Vien Vo","doi":"10.51316/jca.2022.065","DOIUrl":"https://doi.org/10.51316/jca.2022.065","url":null,"abstract":"The Ge/C composite was prepared by hydrothermal method using Germani (Ge) and carbon (C) as precursors, in which C was prepared from waste banana peel as biomass source and Ge was obtained from reduction of GeO2 by Mg at 650 oC. The synthesized composite was characterized by X-ray diffraction (XRD), Infrared spectroscopy (IR), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM); and used as lithium ion battery anode material. The results showed that the Ge/C anode exhibited a higher capacity and stablity than those of the pure Ge. This observation can indicate that the Ge/C composite may be a new class of promising negative electrode material for lithium ion batteries in the future.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85426298","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}
Thanh Ho Thi, Nga Nguyen Thi Viet, Lien Hoang Nu Thuy, Kim Nguyen Van
Heterostructured ZnO/BaTiO3 composites were successfully prepared with varying contents of BaTiO3 via a mixed solvent-thermal method. The samples are denoted as ZBTO-x:y, where x:y is weight ratio of ZnO và BaTiO3 (x:y=1:2, 1:3 và 1:5) in the reaction mixtures. The obtained materials were characterized by X-Ray diffraction (XRD), infrared spectra (IR), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM). The photocatalytic activity of ZBTO-x:y samples was assessed by degradation of methylene blue in aqueous solution under sunlight. Among them, ZBTO-1:3 displayed the best photocatalytic activity. The enhancement in photocatalytic activity for the ZBTO-1:3 was observed, which can be attributed to the presence of BaTiO3 in the materials.
{"title":"Synthesis ZnO/BaTiO3 heterostructured photocatalyst with improved efficiency in MB degradation under sunlight","authors":"Thanh Ho Thi, Nga Nguyen Thi Viet, Lien Hoang Nu Thuy, Kim Nguyen Van","doi":"10.51316/jca.2022.066","DOIUrl":"https://doi.org/10.51316/jca.2022.066","url":null,"abstract":"Heterostructured ZnO/BaTiO3 composites were successfully prepared with varying contents of BaTiO3 via a mixed solvent-thermal method. The samples are denoted as ZBTO-x:y, where x:y is weight ratio of ZnO và BaTiO3 (x:y=1:2, 1:3 và 1:5) in the reaction mixtures. The obtained materials were characterized by X-Ray diffraction (XRD), infrared spectra (IR), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM). The photocatalytic activity of ZBTO-x:y samples was assessed by degradation of methylene blue in aqueous solution under sunlight. Among them, ZBTO-1:3 displayed the best photocatalytic activity. The enhancement in photocatalytic activity for the ZBTO-1:3 was observed, which can be attributed to the presence of BaTiO3 in the materials.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82544738","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}
Dung Ngoc Ta, Quang Van Le, C. D. Huynh, Mai Thanh Pham
In this study, the cement clinker was mixed with P2O5 mineralization additives with the rate of 1.0% and 2.0% (compared to the content of cement clinker without P2O5 mineralization additives which was called the control sample) and then this mixture was calcined at temperatures of 1300oC and 1400oC by gas furnace. The mechanical properties of the prepared cement samples were determined: density and free lime content of clinker; normal consistency and setting time of cement paste; soundness and compressive strength of hardened cement paste. The results showed that, the cement samples mixed with P2O5 mineralization additives had free lime content (1.36-1.91%) which was lower than the control sample (1.39-2.34%). The setting time significantly reduced compared with that of the control sample. The soundness of cement samples mixed with P2O5 reache 0.55-1.2 mm in accordance with TCVN 4031:1985 and it was smaller than that of the control sample. The compressive strength of hardened cement paste sample which mixed with P2O5 of 1.0% (at the age of 28 days) reached 25.23 N/mm2 at 1300oC (the control sample reached 24.32 N/mm2) and reached 28.6 N/mm2 at 1400oC (the control sample reached 27.00 N/mm2). The study showed that, The using of P2O5 mineralization additives with appropriate content will bring to the improved quality of the cement clinker.
{"title":"Study the effects of P2O5 mineralization additives on cement clinker quality at low calcination temperature 1300oC and 1400oC","authors":"Dung Ngoc Ta, Quang Van Le, C. D. Huynh, Mai Thanh Pham","doi":"10.51316/jca.2022.079","DOIUrl":"https://doi.org/10.51316/jca.2022.079","url":null,"abstract":"In this study, the cement clinker was mixed with P2O5 mineralization additives with the rate of 1.0% and 2.0% (compared to the content of cement clinker without P2O5 mineralization additives which was called the control sample) and then this mixture was calcined at temperatures of 1300oC and 1400oC by gas furnace. The mechanical properties of the prepared cement samples were determined: density and free lime content of clinker; normal consistency and setting time of cement paste; soundness and compressive strength of hardened cement paste. The results showed that, the cement samples mixed with P2O5 mineralization additives had free lime content (1.36-1.91%) which was lower than the control sample (1.39-2.34%). The setting time significantly reduced compared with that of the control sample. The soundness of cement samples mixed with P2O5 reache 0.55-1.2 mm in accordance with TCVN 4031:1985 and it was smaller than that of the control sample. The compressive strength of hardened cement paste sample which mixed with P2O5 of 1.0% (at the age of 28 days) reached 25.23 N/mm2 at 1300oC (the control sample reached 24.32 N/mm2) and reached 28.6 N/mm2 at 1400oC (the control sample reached 27.00 N/mm2). The study showed that, The using of P2O5 mineralization additives with appropriate content will bring to the improved quality of the cement clinker.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74051125","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}
Lan Thi Phung, Giang Kim Thi Nguyen, Nga Thanh Pham, Hien Phuong Ho
Rice husk is an agricultural byproduct that is produced in huge quantities during the rice milling process. Following the trend of utilizing agricultural waste, rice husk is activated by many activators to synthesize heavy metal ion adsorbent materials. This work presents the results of the study on the adsorption of nickel ions (Ni2+) by activated rice husks. The husk was activated by three agents (NaOH, acetic acid, and H2O2), which removed 73.29 percent of the hemicellulose and 60.25 percent of the ligin (calculated by the Chesson-Datta method). The influence of time on the adsorption capacity of Ni2+ ions of activated rice husks was carried out with an initial concentration of Ni2+ ions of 160mg/L and a pH of 5.5. The concentration of adsorbent was 1,0 g.L-1. After 80 minutes of adsorption, the equilibrium adsorption capacity reached 33.33 mg.g-1. The maximum adsorption capacity calculated by the Langmuir adsorption model was 57.46 mg.g-1. Three kinetic models (Lagergren's apparent first-order kinetics, second-order apparent kinetics and Webber-Morris internal diffusion kinetics) were also studied and analyzed.
{"title":"Study on the equilibrium and kinetics of nickel adsorption on rice husk: the role of activation","authors":"Lan Thi Phung, Giang Kim Thi Nguyen, Nga Thanh Pham, Hien Phuong Ho","doi":"10.51316/jca.2022.074","DOIUrl":"https://doi.org/10.51316/jca.2022.074","url":null,"abstract":"Rice husk is an agricultural byproduct that is produced in huge quantities during the rice milling process. Following the trend of utilizing agricultural waste, rice husk is activated by many activators to synthesize heavy metal ion adsorbent materials. This work presents the results of the study on the adsorption of nickel ions (Ni2+) by activated rice husks. The husk was activated by three agents (NaOH, acetic acid, and H2O2), which removed 73.29 percent of the hemicellulose and 60.25 percent of the ligin (calculated by the Chesson-Datta method). The influence of time on the adsorption capacity of Ni2+ ions of activated rice husks was carried out with an initial concentration of Ni2+ ions of 160mg/L and a pH of 5.5. The concentration of adsorbent was 1,0 g.L-1. After 80 minutes of adsorption, the equilibrium adsorption capacity reached 33.33 mg.g-1. The maximum adsorption capacity calculated by the Langmuir adsorption model was 57.46 mg.g-1. Three kinetic models (Lagergren's apparent first-order kinetics, second-order apparent kinetics and Webber-Morris internal diffusion kinetics) were also studied and analyzed.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88733518","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}
Tân Rai (Tay Nguyen) red mud is the waste from alumina production of bauxit ore. The composition of red mud contains mainly the iron oxide and other metals oxide as SiO2, Al2O3…The aluminum and silica in red mud was used to synthesize the zeolite material. The zeolite material was synthesized by the hydrothermal method from red mud by adding Si which was RM-ZeO-Si and RM-ZeO-Si/Al for both Si and Al added. The structure of zeolite material studied by X-Ray, EDX, BET and FT-IR. The results showed that the synthesized zeolite was likely the new kind one with one sunfua S atom in the formular Na8(Al6Si6O24)S.4H2O. The absorption arsenate was studied on both materials, the maximum adsorption capacity of arsenate by Langmuir model was 7.63 mg/g and 5.81 mg/g for RM ZeO-Si and RM ZeO-Si/Al, the maximum adsorption capacity was higher than the adsorption ablility of original Tay Nguyen red mud (2.30 mg/g).
n Rai (Tay Nguyen)赤泥是铝土矿氧化铝生产的废渣，赤泥的主要成分是氧化铁和其他金属氧化物SiO2、Al2O3，赤泥中的铝和二氧化硅被用来合成沸石材料。以赤泥为原料，加入Si，采用水热法合成沸石材料，Si和Al分别为RM-ZeO-Si和RM-ZeO-Si/Al。采用x -射线、EDX、BET和FT-IR研究了沸石材料的结构。结果表明，所合成的分子式为Na8(Al6Si6O24)S. 4h2o中含有一个孙复S原子的新型分子筛。研究了两种材料对砷酸盐的吸附性能，根据Langmuir模型，RM ZeO-Si和RM ZeO-Si/Al对砷酸盐的最大吸附量分别为7.63 mg/g和5.81 mg/g，其最大吸附量均高于原Tay Nguyen赤泥的吸附量(2.30 mg/g)。
{"title":"Study on the adsorption of arsenate in aqueous solution by zeolite material synthesized from Tay Nguyen red mud","authors":"H. Pham, Ha M. Nguyen","doi":"10.51316/jca.2022.076","DOIUrl":"https://doi.org/10.51316/jca.2022.076","url":null,"abstract":"Tân Rai (Tay Nguyen) red mud is the waste from alumina production of bauxit ore. The composition of red mud contains mainly the iron oxide and other metals oxide as SiO2, Al2O3…The aluminum and silica in red mud was used to synthesize the zeolite material. The zeolite material was synthesized by the hydrothermal method from red mud by adding Si which was RM-ZeO-Si and RM-ZeO-Si/Al for both Si and Al added. The structure of zeolite material studied by X-Ray, EDX, BET and FT-IR. The results showed that the synthesized zeolite was likely the new kind one with one sunfua S atom in the formular Na8(Al6Si6O24)S.4H2O. The absorption arsenate was studied on both materials, the maximum adsorption capacity of arsenate by Langmuir model was 7.63 mg/g and 5.81 mg/g for RM ZeO-Si and RM ZeO-Si/Al, the maximum adsorption capacity was higher than the adsorption ablility of original Tay Nguyen red mud (2.30 mg/g).","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80776096","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}
Thanh Duong Cong Nguyen, P. M. Hoang, Hoang Minh Tran, Bach Dinh Dao, Hung Viet Do, N. Nguyen, Thuy-Duong Thi Nguyen
Rice-husk ash (RHA) is prepared from a by-product of rice production. Its main component is silic dioxide. Thanks a zeolite-like structure, it could be used as an adsorbent. In this study, RHA was used to remove some antibiotic and anti-inflammatory drugs in aqueous medium such as Cefuroxim, Dexamethasone, Methylprednisolone, Prednisolon. These drugs are recommended to use at home for Covid-19 patients. The RHA has a specific surface area of 179.797 m2/g), the pore size of 63.547 m2/g, the average particle size of 3.8 mm. The zeta potential of RHA in distilled water of -42.5 V, the point of zero charge of 6.7. The main composition of elements in RHA is Si, O, C. Among investigated samples, the Cefuroxim adsorption efficiency of RHA is the best, with a adsorption capacity reached 1.43 mg.g-1 and adsorption efficiency reached 86.00 % at the optimum adsorption condition of pH solution of 7, adsorption time of 150 min, RHA weight of 0.3 g and the initial drug concentration of 5.0 mg.L-1.
{"title":"Study on using rice-husk ash as an adsorbent for some antibiotic and anti-inflammatory drugs in aqueous","authors":"Thanh Duong Cong Nguyen, P. M. Hoang, Hoang Minh Tran, Bach Dinh Dao, Hung Viet Do, N. Nguyen, Thuy-Duong Thi Nguyen","doi":"10.51316/jca.2022.077","DOIUrl":"https://doi.org/10.51316/jca.2022.077","url":null,"abstract":"Rice-husk ash (RHA) is prepared from a by-product of rice production. Its main component is silic dioxide. Thanks a zeolite-like structure, it could be used as an adsorbent. In this study, RHA was used to remove some antibiotic and anti-inflammatory drugs in aqueous medium such as Cefuroxim, Dexamethasone, Methylprednisolone, Prednisolon. These drugs are recommended to use at home for Covid-19 patients. The RHA has a specific surface area of 179.797 m2/g), the pore size of 63.547 m2/g, the average particle size of 3.8 mm. The zeta potential of RHA in distilled water of -42.5 V, the point of zero charge of 6.7. The main composition of elements in RHA is Si, O, C. Among investigated samples, the Cefuroxim adsorption efficiency of RHA is the best, with a adsorption capacity reached 1.43 mg.g-1 and adsorption efficiency reached 86.00 % at the optimum adsorption condition of pH solution of 7, adsorption time of 150 min, RHA weight of 0.3 g and the initial drug concentration of 5.0 mg.L-1.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79025329","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}
L. T. Tran, H. T. Dang, G. T. L. Hoang, Q. Nguyen, Thi Duyen Nguyen, Cuong Xuan Trinh, H. V. Tran, C. D. Huynh
MIL-53/rGO material has been synthesized in a 2-step process on the basis of metal organic framework material of MIL-53(Fe) and reduced graphene (rGO). Material characteristics were studied through XRD, SEM, and electrochemical DPV measurements. Electrochemical sensor based on nanocomposite MIL-53(Fe)/rGO material has been developed, showing outstanding advantages including the ability to detect directly Cd2+ ions in aqueous solution, fast detection time and sensitivity. quite tall. The relationship between the sensor output signal (Ipeak) and the concentration of Cd2+ ions in the range 1 to 9 μM is linear, having the square of the correlation coefficient R2 = 0.9705.
{"title":"Research on synthesis and electrochemical properties of MIL-53 /rGO materials and application of electrochemical sensor development to detect Cd2+ ions in aqueous solutions","authors":"L. T. Tran, H. T. Dang, G. T. L. Hoang, Q. Nguyen, Thi Duyen Nguyen, Cuong Xuan Trinh, H. V. Tran, C. D. Huynh","doi":"10.51316/jca.2022.080","DOIUrl":"https://doi.org/10.51316/jca.2022.080","url":null,"abstract":"MIL-53/rGO material has been synthesized in a 2-step process on the basis of metal organic framework material of MIL-53(Fe) and reduced graphene (rGO). Material characteristics were studied through XRD, SEM, and electrochemical DPV measurements. Electrochemical sensor based on nanocomposite MIL-53(Fe)/rGO material has been developed, showing outstanding advantages including the ability to detect directly Cd2+ ions in aqueous solution, fast detection time and sensitivity. quite tall. The relationship between the sensor output signal (Ipeak) and the concentration of Cd2+ ions in the range 1 to 9 μM is linear, having the square of the correlation coefficient R2 = 0.9705.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75080726","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}
H. Tran, L. Pham, N. Do, Phuc Van Ban, H. Nguyen, T. Dang, T. N. Duong, D. Do, Hoan Xuan Vu
The paper reported synthesizing 1,4-dihydropyridine (1,4-DHP) from β-ketoester, aromatic aldehyde, and ammonium acetate via a two-step, using heterogeneous catalyst Amberlyst-15 in high yields at room temperature. The method was applied to synthesize some 1,4-DHP derivatives. Moreover, the catalyst was reused at least five times without loss of catalytic activity under eco-friendly conditions.
{"title":"Amberlyst-15, an efficient heterogeneous catalyst for the 1,4-dihydropyridine synthesis","authors":"H. Tran, L. Pham, N. Do, Phuc Van Ban, H. Nguyen, T. Dang, T. N. Duong, D. Do, Hoan Xuan Vu","doi":"10.51316/jca.2022.075","DOIUrl":"https://doi.org/10.51316/jca.2022.075","url":null,"abstract":"The paper reported synthesizing 1,4-dihydropyridine (1,4-DHP) from β-ketoester, aromatic aldehyde, and ammonium acetate via a two-step, using heterogeneous catalyst Amberlyst-15 in high yields at room temperature. The method was applied to synthesize some 1,4-DHP derivatives. Moreover, the catalyst was reused at least five times without loss of catalytic activity under eco-friendly conditions.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76126338","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}
Toan Quoc Tran, Loan Thi Tong, Huong Tra Do, Truong Van Nguyen, O. Phung, Mai Thi Nguyen, Keomany Inthavong, Van Khanh Thi Nguyen, Dang Van Nguyen
This study reported the results of fabricating ZnO nanoparticles by an one-step sonochemical method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). The photodegradation of Methylene Blue (MB) has been investigated in the presence of ZnO nanomaterials under Xenon light irradiation. The results showed that the degradation efficiency of MB (20 ppm, 200 mL) was about 93.1% after 75 minutes. The Intermediate product analysis and photocatalytic degradation pathway of MB were also studied.
{"title":"Photocatalytic degradation of methylene blue using ZnO nanomaterials prepared from sonochemical method","authors":"Toan Quoc Tran, Loan Thi Tong, Huong Tra Do, Truong Van Nguyen, O. Phung, Mai Thi Nguyen, Keomany Inthavong, Van Khanh Thi Nguyen, Dang Van Nguyen","doi":"10.51316/jca.2022.078","DOIUrl":"https://doi.org/10.51316/jca.2022.078","url":null,"abstract":"This study reported the results of fabricating ZnO nanoparticles by an one-step sonochemical method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). The photodegradation of Methylene Blue (MB) has been investigated in the presence of ZnO nanomaterials under Xenon light irradiation. The results showed that the degradation efficiency of MB (20 ppm, 200 mL) was about 93.1% after 75 minutes. The Intermediate product analysis and photocatalytic degradation pathway of MB were also studied.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85966533","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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