T. T. Bui, T. Dang, Khun Borin, Thanh Nam Ly, Trung T. Pham, Thanh Xuan Thi Phan, Ngoc Pham-Cong
Two ionic liquids triethylammonium oleate and triethylammonium stearate were synthesized from fatty acids and triethyl amine using two different methods (one step and three step methods). The yield triethylammonium oleate rearch 68.8-74% (one step method) and 86.3% (three step method) and of triethylammonium stearate rearch 68.7-74.1 (one step method) and 83.5% (three step method). The one step method spends more time but less chemicals and brings higher yield. FT-IR and 1H-NMR spectra of ILs obtained from both method was measured. The results showed that synthesis method doesn’t affect on the structure of the products and ILs obtained from one step method has higher purity.
{"title":"Investigation on synthesis of two ammonium based ionic liquids from fatty acids and triethylamine","authors":"T. T. Bui, T. Dang, Khun Borin, Thanh Nam Ly, Trung T. Pham, Thanh Xuan Thi Phan, Ngoc Pham-Cong","doi":"10.51316/jca.2023.012","DOIUrl":"https://doi.org/10.51316/jca.2023.012","url":null,"abstract":"Two ionic liquids triethylammonium oleate and triethylammonium stearate were synthesized from fatty acids and triethyl amine using two different methods (one step and three step methods). The yield triethylammonium oleate rearch 68.8-74% (one step method) and 86.3% (three step method) and of triethylammonium stearate rearch 68.7-74.1 (one step method) and 83.5% (three step method). The one step method spends more time but less chemicals and brings higher yield. FT-IR and 1H-NMR spectra of ILs obtained from both method was measured. The results showed that synthesis method doesn’t affect on the structure of the products and ILs obtained from one step method has higher purity.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87943847","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}
T. Tran, Tuyen Vo, Tram Le Thi Pham, Hung Minh Ngo, M. Nguyen, H. Le, H. Nguyen
Metal oxide semiconductor materials onto g-C3N4 and rGO as photocatalysts have attracted considerably due to its potential application in different fields, special in environmental treatment. In this paper, we report the synthesís of ZnO/g-C3N4/rGO through hydrothermal method from ZnO/g-C3N4 and rGO. The effect of ratio of the ZnO và g-C3N4 on the structural and morphology of the synthesized nanoparticles were perfomed. The obtained results from characterization methods such as XRD, SEM, FT-IR, EDX,… showed that the materials have a high crystallinity, and ZnO particles were dispersed highly onto g-C3N4 sheets as well as layers of graphene oxide reduced. The photocatalytic activity of ZnO/g-C3N4/rGO was estimated through the degradation of Ciprofloxacin (CIP) in aqueous solution. CIP decomposition efficiency is up to 90% after 240 minutes exposuring to sun light irradiation.
{"title":"Synthesis and photocatalytic application of g-C3N4/rGO based metal oxide semiconductors","authors":"T. Tran, Tuyen Vo, Tram Le Thi Pham, Hung Minh Ngo, M. Nguyen, H. Le, H. Nguyen","doi":"10.51316/jca.2023.018","DOIUrl":"https://doi.org/10.51316/jca.2023.018","url":null,"abstract":"Metal oxide semiconductor materials onto g-C3N4 and rGO as photocatalysts have attracted considerably due to its potential application in different fields, special in environmental treatment. In this paper, we report the synthesís of ZnO/g-C3N4/rGO through hydrothermal method from ZnO/g-C3N4 and rGO. The effect of ratio of the ZnO và g-C3N4 on the structural and morphology of the synthesized nanoparticles were perfomed. The obtained results from characterization methods such as XRD, SEM, FT-IR, EDX,… showed that the materials have a high crystallinity, and ZnO particles were dispersed highly onto g-C3N4 sheets as well as layers of graphene oxide reduced. The photocatalytic activity of ZnO/g-C3N4/rGO was estimated through the degradation of Ciprofloxacin (CIP) in aqueous solution. CIP decomposition efficiency is up to 90% after 240 minutes exposuring to sun light irradiation.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77323361","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}
Huy Minh Nguyen, Kien Minh Thi Tran, T. Doan, Thien Duc Nguyen, Minh Ngoc Nguyen, Lieu Thi Nguyen, Hien Thanh Ngo, Phuong Thi Ngoe Huynh, Hiep Minh Phuoc Phan, H. V. T. Nguyen
In this paper, we report the photolithography manufacturing of solid- ion selective membrane electrodes ammonium and nitrate in a cleanroom, using ammonium ionophore I (nonactin) and nitrate ionophore VI as starting materials. The developed probes are utilized with multipurpose electrochemical devices to potentiometrically monitor the concentration of ammonium and nitrate ions. The research results showed that, S-ISM ammonium and nitrate can be used to measure ammonium and nitrate ions with high selectivity; it is also stable under research circumstances, with hardly any change in the OCP signals over time and a low limit of detection (LOD) of 2.0 ppm for NH4+ and 2.5 ppm for NO3-.
{"title":"Study on fabrication ion-selective membrane electrodes to improve electrochemical characteristics of electrodes for applied in water analysis","authors":"Huy Minh Nguyen, Kien Minh Thi Tran, T. Doan, Thien Duc Nguyen, Minh Ngoc Nguyen, Lieu Thi Nguyen, Hien Thanh Ngo, Phuong Thi Ngoe Huynh, Hiep Minh Phuoc Phan, H. V. T. Nguyen","doi":"10.51316/jca.2023.020","DOIUrl":"https://doi.org/10.51316/jca.2023.020","url":null,"abstract":"In this paper, we report the photolithography manufacturing of solid- ion selective membrane electrodes ammonium and nitrate in a cleanroom, using ammonium ionophore I (nonactin) and nitrate ionophore VI as starting materials. The developed probes are utilized with multipurpose electrochemical devices to potentiometrically monitor the concentration of ammonium and nitrate ions. The research results showed that, S-ISM ammonium and nitrate can be used to measure ammonium and nitrate ions with high selectivity; it is also stable under research circumstances, with hardly any change in the OCP signals over time and a low limit of detection (LOD) of 2.0 ppm for NH4+ and 2.5 ppm for NO3-.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88283218","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}
Tuning the charge carier concentration of graphene is one of the key challenges in the field of graphene research. An effective solution for this is to dope graphene by organic molecules that physisorb or self-assemble on the graphene surface. Therefore, a comprehensive understanding of their surface structures at the molecular level is realy nessesary. In this contribution, we report on the role of the applied electrode potential in the adsorption/self-assembly of such n-dope molecule, dibenzyl viologen (DBV), on a highly oriented pyrolytic graphte (HOPG) surface (a multi-layer graphene material) determined by using a combination of cyclic voltametry (CV) and electrochemical scanning tunneling microscopy (ECSTM) methods. The obtained results reveal that dibenzyl viologen molecules can exist at three redox states corresponding to three respective adsorbate phases depending on the applied electrode potential. The DBV2+ molecucles physisorb and form disordered phase, whereas DBV·+ and DBV0 moleucles self-assemble forming dimer and stacking phases, respectively, on HOPG surface.
{"title":"On the role of applied potential in adsorption of dibenzyl viologen molecules on HOPG surface","authors":"Trung Mien Thi Huynh, H. Phan","doi":"10.51316/jca.2023.009","DOIUrl":"https://doi.org/10.51316/jca.2023.009","url":null,"abstract":"Tuning the charge carier concentration of graphene is one of the key challenges in the field of graphene research. An effective solution for this is to dope graphene by organic molecules that physisorb or self-assemble on the graphene surface. Therefore, a comprehensive understanding of their surface structures at the molecular level is realy nessesary. In this contribution, we report on the role of the applied electrode potential in the adsorption/self-assembly of such n-dope molecule, dibenzyl viologen (DBV), on a highly oriented pyrolytic graphte (HOPG) surface (a multi-layer graphene material) determined by using a combination of cyclic voltametry (CV) and electrochemical scanning tunneling microscopy (ECSTM) methods. The obtained results reveal that dibenzyl viologen molecules can exist at three redox states corresponding to three respective adsorbate phases depending on the applied electrode potential. The DBV2+ molecucles physisorb and form disordered phase, whereas DBV·+ and DBV0 moleucles self-assemble forming dimer and stacking phases, respectively, on HOPG surface.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77199412","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 report, poly(1,8-diaminonaphthalene) as a molecularly imprinted polymer (MIP) coated on gold nanoparticles (nano Au) dispersed on ITO electrode was prepared. While nano Au strongly enhance the Raman signal of the analyte, MIP layer allows to selective trap and enrich the analyte molecules close to the Au surface. In fact, by building a polymer matrix around target molecules, in this case is rhodamine B and then extraction of the imprinted molecules, we can create the specific cavities in the MIP shell with a 3D structure complementary to the template molecule in shape and chemical functionality. The rhodamine molecules on ITO/Au/MIP substrate were detected using surface-enhanced Raman spectroscopy (SERS) with an enhancement factor of 106. The SERS peak intensity at 611 and 771 cm-1 was found to be proportional to the Rhodamine concentration with correlation coefficients of 0.993 and 0.935, respectively. These results open up prospects for development of poly(1,8-diaminonaphthalene) as a molecularly imprinted polymer for applications in plasmonic sensing.
{"title":"Preparation of poly(1,8-diaminonaphthalene)-based molecularly imprinted polymers for rhodamine onto ITO/Au electrodes and analytical application by surface-enhanced Raman spectroscopy (SERS)","authors":"M. Nguyen, H. V. Giap, H. Nguyen","doi":"10.51316/jca.2023.021","DOIUrl":"https://doi.org/10.51316/jca.2023.021","url":null,"abstract":"In this report, poly(1,8-diaminonaphthalene) as a molecularly imprinted polymer (MIP) coated on gold nanoparticles (nano Au) dispersed on ITO electrode was prepared. While nano Au strongly enhance the Raman signal of the analyte, MIP layer allows to selective trap and enrich the analyte molecules close to the Au surface. In fact, by building a polymer matrix around target molecules, in this case is rhodamine B and then extraction of the imprinted molecules, we can create the specific cavities in the MIP shell with a 3D structure complementary to the template molecule in shape and chemical functionality. The rhodamine molecules on ITO/Au/MIP substrate were detected using surface-enhanced Raman spectroscopy (SERS) with an enhancement factor of 106. The SERS peak intensity at 611 and 771 cm-1 was found to be proportional to the Rhodamine concentration with correlation coefficients of 0.993 and 0.935, respectively. These results open up prospects for development of poly(1,8-diaminonaphthalene) as a molecularly imprinted polymer for applications in plasmonic sensing.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76110950","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}
Douglas Tran, M. Dang, Chau Ngoc Chu, N. Nguyen, H. Do, Dong Thanh Pham, Viet Minh Nguyen, P. M. Nguyen
Photocatalysts have been effectively applied for water treatment. Narrow bandgap energy semiconductors show good photocatalytic performance at visible light. However, high recombination rate of the photogenerated electrons and holes leads to their low photocatalytic activity. Moreover, the conduction and valence band potentials of these materials are not suitable for the redox reactions with water and oxygen to generate HO• and •O2⁻ radicals, respectively. Therefore, the development of new photocatalyst systems to overcome these disadvantages is necessary. This study investigated the photocatalytic activity of FeWO4/rGO/g-C3N4 Z-scheme photocatalytic system via the degradation of Rhodamine B in water. The photocatalyst was synthesized by simple hydrothermal method and characterized by X-ray diffraction method (XRD), fluorescence spectroscopy (PL) and diffuse reflectance spectra (UV-vis). The results showed that after 150 minutes illumination, the Rhodamine B decomposition efficiency on FeWO4/g-C3N4 and FeWO4/rGO/g-C3N4 were 93.07 and 99.21%, respectively. These values were significantly higher than that of g-C3N4 under the same catalytic concentration of 0.1g/L. In the FeWO4/rGO/g-C3N4 heterostructure, rGO acted as electron mediator and transporter between two semiconductors, resulting in a lower recombination rate of photogenerated charges. As the results, the photocatalytic performance was enhanced.
{"title":"Synthesis of Z-scheme heterostructure FeWO4/rGO/g-C3N4 as a visible-light photocatalyst for removal of organic pollutant","authors":"Douglas Tran, M. Dang, Chau Ngoc Chu, N. Nguyen, H. Do, Dong Thanh Pham, Viet Minh Nguyen, P. M. Nguyen","doi":"10.51316/jca.2023.003","DOIUrl":"https://doi.org/10.51316/jca.2023.003","url":null,"abstract":"Photocatalysts have been effectively applied for water treatment. Narrow bandgap energy semiconductors show good photocatalytic performance at visible light. However, high recombination rate of the photogenerated electrons and holes leads to their low photocatalytic activity. Moreover, the conduction and valence band potentials of these materials are not suitable for the redox reactions with water and oxygen to generate HO• and •O2⁻ radicals, respectively. Therefore, the development of new photocatalyst systems to overcome these disadvantages is necessary. This study investigated the photocatalytic activity of FeWO4/rGO/g-C3N4 Z-scheme photocatalytic system via the degradation of Rhodamine B in water. The photocatalyst was synthesized by simple hydrothermal method and characterized by X-ray diffraction method (XRD), fluorescence spectroscopy (PL) and diffuse reflectance spectra (UV-vis). The results showed that after 150 minutes illumination, the Rhodamine B decomposition efficiency on FeWO4/g-C3N4 and FeWO4/rGO/g-C3N4 were 93.07 and 99.21%, respectively. These values were significantly higher than that of g-C3N4 under the same catalytic concentration of 0.1g/L. In the FeWO4/rGO/g-C3N4 heterostructure, rGO acted as electron mediator and transporter between two semiconductors, resulting in a lower recombination rate of photogenerated charges. As the results, the photocatalytic performance was enhanced.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79708046","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}
N. Nguyen, Ha L. Nguyen, Thanh Thi Ho, Lieu Thanh Thi Le, L. Nguyen, Thuat Ngoc Pham, Kim-Van Nguyen
In this study, the SnO2/BaTiO3 heterostructure has been fabricated by firstly preparing SnO2 and BaTiO3 through, followed by coupling SnO2 and BaTiO3 by the hydrothermally method. The samples are denoted as SBTO-x:y, where x:y is weight ratio of SnO2 và BaTiO3 (x:y = 1:3, 1:5 và 1:7) in the reaction mixtures. The obtained materials were characterized by XRD, IR, EDS-mapping, SEM. The photocatalytic activity of SBTO-x:y SnO2 and BaTiO3 samples was assessed by degradation of methylene blue in aqueous solution under sunlight. Among them, SBTO-1:5 exhibited the best performance. An enhancement in photocatalytic activity of the composites is believed to the presence of BaTiO3.
本研究首先通过水热法制备SnO2和BaTiO3，然后用水热法偶联SnO2和BaTiO3，制备了SnO2/BaTiO3异质结构。样品记为SBTO-x:y，其中x:y为反应混合物中SnO2 v BaTiO3的质量比(x:y = 1:3, 1:5 v:7)。通过XRD、IR、eds、SEM等手段对所得材料进行了表征。通过对水溶液中亚甲基蓝的降解，考察了SBTO-x:y SnO2和BaTiO3样品的光催化活性。其中SBTO-1:5表现出最好的性能。复合材料光催化活性的增强被认为是由于BaTiO3的存在。
{"title":"Photocatalytic degradation of methylene blue from an aqueous solution using SnO2/BaTiO3 heterostructure","authors":"N. Nguyen, Ha L. Nguyen, Thanh Thi Ho, Lieu Thanh Thi Le, L. Nguyen, Thuat Ngoc Pham, Kim-Van Nguyen","doi":"10.51316/jca.2023.006","DOIUrl":"https://doi.org/10.51316/jca.2023.006","url":null,"abstract":"In this study, the SnO2/BaTiO3 heterostructure has been fabricated by firstly preparing SnO2 and BaTiO3 through, followed by coupling SnO2 and BaTiO3 by the hydrothermally method. The samples are denoted as SBTO-x:y, where x:y is weight ratio of SnO2 và BaTiO3 (x:y = 1:3, 1:5 và 1:7) in the reaction mixtures. The obtained materials were characterized by XRD, IR, EDS-mapping, SEM. The photocatalytic activity of SBTO-x:y SnO2 and BaTiO3 samples was assessed by degradation of methylene blue in aqueous solution under sunlight. Among them, SBTO-1:5 exhibited the best performance. An enhancement in photocatalytic activity of the composites is believed to the presence of BaTiO3.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87873610","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}
Kim-Van Nguyen, Hoa Thanh Dong, Thanh Thi Ho, Lieu Thanh Thi Le, Thanh Minh Thi Huynh, Nga N. T. Nguyen
The g-C3N4/SrTiO3 composite was hydrothermally synthesized at 150 oC for 12 hours from a dispersed mixture of g-C3N4 and SrTiO3 in water, in which SrTiO3 was hydrothermally synthesized at 150 oC for 12 hours using strontium nitrate, propan-2-ol, titanium tetrachloride and sodium hydroxide as precursors without assistance of any surfactant; and g-C3N4 was prepared by pyrolysis of melamine at 520 oC. The properties of materials were characterized by various techniques such as X-ray diffraction (XRD), infrared spectra (IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS). The photocatalytic activity of materials was assessed by degradation of methylene blue (MB) under visible light. The enhancement of photocatalytic activity of the g-C3N4/SrTiO3 composite compared to single components g-C3N4 and SrTiO3 was observed.
{"title":"Preparation, characterization, and photocatalytic activity of g-C3N4/SrTiO3 composite","authors":"Kim-Van Nguyen, Hoa Thanh Dong, Thanh Thi Ho, Lieu Thanh Thi Le, Thanh Minh Thi Huynh, Nga N. T. Nguyen","doi":"10.51316/jca.2023.005","DOIUrl":"https://doi.org/10.51316/jca.2023.005","url":null,"abstract":"The g-C3N4/SrTiO3 composite was hydrothermally synthesized at 150 oC for 12 hours from a dispersed mixture of g-C3N4 and SrTiO3 in water, in which SrTiO3 was hydrothermally synthesized at 150 oC for 12 hours using strontium nitrate, propan-2-ol, titanium tetrachloride and sodium hydroxide as precursors without assistance of any surfactant; and g-C3N4 was prepared by pyrolysis of melamine at 520 oC. The properties of materials were characterized by various techniques such as X-ray diffraction (XRD), infrared spectra (IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS). The photocatalytic activity of materials was assessed by degradation of methylene blue (MB) under visible light. The enhancement of photocatalytic activity of the g-C3N4/SrTiO3 composite compared to single components g-C3N4 and SrTiO3 was observed.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76111208","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}
Characterization of a tetradentate ONNO Schiff base ligand namely (1, 1′- (pyridine-2, 3-dimethyliminomethyl) naphthalene-2, 2′-diol) and hereafter denotes as “SL″ and selected metal complexes including Mn(II), Fe(II), Co(II) and Cd(II) as a central metal was studied.In this paper, the calculation was done to determine the magnetic exchange of the studied molecules, Schiff base complexes via DFT calculations. Using the ZORA approach with the BP86 functionals and appropriate basis set def2-tzvp and Coulomb fitting, the optimized geometries were obtained with reliable accuracy and precision.The dipole moment was calculated. The EPR parameters were also reported.
{"title":"Density Functional Theory Investigation of EPR Parameters for of Mn(II), Fe(II), Co(II) and Cd(II) complexes based on a tetradentate ONNO donor Schiff base ligand","authors":"Duc-Trung Nguyen, T. N. Nguyen, T. V. Pham","doi":"10.51316/jca.2023.008","DOIUrl":"https://doi.org/10.51316/jca.2023.008","url":null,"abstract":"Characterization of a tetradentate ONNO Schiff base ligand namely (1, 1′- (pyridine-2, 3-dimethyliminomethyl) naphthalene-2, 2′-diol) and hereafter denotes as “SL″ and selected metal complexes including Mn(II), Fe(II), Co(II) and Cd(II) as a central metal was studied.In this paper, the calculation was done to determine the magnetic exchange of the studied molecules, Schiff base complexes via DFT calculations. Using the ZORA approach with the BP86 functionals and appropriate basis set def2-tzvp and Coulomb fitting, the optimized geometries were obtained with reliable accuracy and precision.The dipole moment was calculated. The EPR parameters were also reported.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89057258","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}
Hoa Thi Lai, G. T. Nguyen, Y. Nguyen, Hien Phuong Ho, Phuong Thi Tuyet Nguyen
The g-C3N4/TCPP porphyrin composite was successfully fabricated via self-assembly approach. The composite was characterized using UV-Vis spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and FT-IR techniques. The results showed good integration of the porphyrin nanofibers with diameter of less than 100 nm and the length of several micrometer on the g-C3N4’s surface. The prepared g-C3N4/TCPP porphyrin composite showed high photocatalytic efficiency for MB degradation under sunlight irradiation, with MB removal efficiency 90% after 100 min of simulated sunlight irrdadiation. The g-C3N4/TCPP porphyrin composite could be used as a promising photocatalyst for the treatment of other organic dyes in water.
{"title":"Study on the synthesis of g-C3N4/TCPP porphyrin composite and its application as photocatalyst for treatmen of MB organic dye in water","authors":"Hoa Thi Lai, G. T. Nguyen, Y. Nguyen, Hien Phuong Ho, Phuong Thi Tuyet Nguyen","doi":"10.51316/jca.2023.002","DOIUrl":"https://doi.org/10.51316/jca.2023.002","url":null,"abstract":"The g-C3N4/TCPP porphyrin composite was successfully fabricated via self-assembly approach. The composite was characterized using UV-Vis spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and FT-IR techniques. The results showed good integration of the porphyrin nanofibers with diameter of less than 100 nm and the length of several micrometer on the g-C3N4’s surface. The prepared g-C3N4/TCPP porphyrin composite showed high photocatalytic efficiency for MB degradation under sunlight irradiation, with MB removal efficiency 90% after 100 min of simulated sunlight irrdadiation. The g-C3N4/TCPP porphyrin composite could be used as a promising photocatalyst for the treatment of other organic dyes in water.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89300584","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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