Son Le Thanh, Binh Nguyen Thanh, Dang Do Van, Long Dang Van
The series x% (wt) Cu2O/g-C3N4 composites were prepared by the conventional impregnation method. These compounds were characterized by different methods such as X-ray Diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), UV–vis diffuse reflectance spectroscopy (UV-DRS), and Photoluminescence spectroscopy (PL). The results clearly showed the existence of Cu2O and g-C3N4 phases. The photocatalytic activity was estimated by the degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D). The 5% Cu2O/g-C3N4 catalyst showed the highest activity, with the photodegradation yield reached 7,3%. The addition of H2O2 remarkably improved the yield, with 98,5% attained after 1 hour of irradiation.
{"title":"Investigation of photodegradation of 2,4-Dichlorophenoxyacetic acid on Cu2O/g-C3N4 catalysts","authors":"Son Le Thanh, Binh Nguyen Thanh, Dang Do Van, Long Dang Van","doi":"10.51316/jca.2022.056","DOIUrl":"https://doi.org/10.51316/jca.2022.056","url":null,"abstract":"The series x% (wt) Cu2O/g-C3N4 composites were prepared by the conventional impregnation method. These compounds were characterized by different methods such as X-ray Diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), UV–vis diffuse reflectance spectroscopy (UV-DRS), and Photoluminescence spectroscopy (PL). The results clearly showed the existence of Cu2O and g-C3N4 phases. The photocatalytic activity was estimated by the degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D). The 5% Cu2O/g-C3N4 catalyst showed the highest activity, with the photodegradation yield reached 7,3%. The addition of H2O2 remarkably improved the yield, with 98,5% attained after 1 hour of irradiation. ","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76994510","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}
Mai Nguyen Vu Ngoc, Hung Le Bao, Chuc Pham Ngoc, Lim Duong Thi, Bac Nguyen Quang, Lam Tran Dai
In this study, photocatalysis was applied to degrade methyl orange (MO) and methylene blue (MB) pollutants using nanoparticles (i.e., Fe2O3, Mn2O3, Fe2O3 – Mn2O3). The results were shown that MB was relatively easier to decompose than MO. At the same initial concentration of 10 ppm, all nanomaterials need 120 min to degrade MB from 74.4%-96.5%, while after 180 min, MO is only degraded by 50%-95%. For both pollutants, the mixed nano-oxides of Fe2O3-Mn2O3 presented a superior treatment efficiency compared to the two single oxides (i.e., Fe2O3 and Mn2O3). The degradation efficiency was recorded with the order Fe2O3-Mn2O3 Fe2O3 Mn2O3. During photodecomposition, formed intermediates due to the incomplete reaction of pollutions and hydroxyl radical were investigated using the ions trap technique.
{"title":"A comparative study on the photodegradation of methyl orange, methylene blue using Fe2O3, Mn2O3, and Fe2O3 – Mn2O3 nanomaterials","authors":"Mai Nguyen Vu Ngoc, Hung Le Bao, Chuc Pham Ngoc, Lim Duong Thi, Bac Nguyen Quang, Lam Tran Dai","doi":"10.51316/jca.2022.051","DOIUrl":"https://doi.org/10.51316/jca.2022.051","url":null,"abstract":"In this study, photocatalysis was applied to degrade methyl orange (MO) and methylene blue (MB) pollutants using nanoparticles (i.e., Fe2O3, Mn2O3, Fe2O3 – Mn2O3). The results were shown that MB was relatively easier to decompose than MO. At the same initial concentration of 10 ppm, all nanomaterials need 120 min to degrade MB from 74.4%-96.5%, while after 180 min, MO is only degraded by 50%-95%. For both pollutants, the mixed nano-oxides of Fe2O3-Mn2O3 presented a superior treatment efficiency compared to the two single oxides (i.e., Fe2O3 and Mn2O3). The degradation efficiency was recorded with the order Fe2O3-Mn2O3 Fe2O3 Mn2O3. During photodecomposition, formed intermediates due to the incomplete reaction of pollutions and hydroxyl radical were investigated using the ions trap technique.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75191254","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}
Ordered mesoporous carbon materials using MCF silica as hard template (OMC(MCF)) were synthesized. The synthesized OMC(MCF) materials were characterized by different techniques such as XRD, TEM, BET. The results revealed that the surface area, pore volume and pore size of OMC (MCF) were of 1,073 m2 /g, 1.35 cm3 /g and 5.7 nm, respectively. The dye adsorption experiments were carried out through a batch test to evaluate synthesized OMC(MCF) materials. Methylene blue (MB- cationic dye), phenol red (PR - anionic dye) and direct blue 71 dyes (DB71- anionic dye) were chosen as adsorbates. Negatively charged surfaces OMC(MCF) materials have better adsorption capacity for positively charged methylene blue than that of negatively charged direct blue 71 and phenol red. OMC(MCF) materials could be used as a potential adsorbent for the removal of positive charged organic dyes.
{"title":"Dyes adsorption properties of odered mesoporous carbon material using mcf silica as hard template","authors":"H. Nguyen, Linh Thi Kim Linh, Quy M. Bui, P. Dang","doi":"10.51316/jca.2022.047","DOIUrl":"https://doi.org/10.51316/jca.2022.047","url":null,"abstract":"Ordered mesoporous carbon materials using MCF silica as hard template (OMC(MCF)) were synthesized. The synthesized OMC(MCF) materials were characterized by different techniques such as XRD, TEM, BET. The results revealed that the surface area, pore volume and pore size of OMC (MCF) were of 1,073 m2 /g, 1.35 cm3 /g and 5.7 nm, respectively. The dye adsorption experiments were carried out through a batch test to evaluate synthesized OMC(MCF) materials. Methylene blue (MB- cationic dye), phenol red (PR - anionic dye) and direct blue 71 dyes (DB71- anionic dye) were chosen as adsorbates. Negatively charged surfaces OMC(MCF) materials have better adsorption capacity for positively charged methylene blue than that of negatively charged direct blue 71 and phenol red. OMC(MCF) materials could be used as a potential adsorbent for the removal of positive charged organic dyes.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83970248","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}
The synthesis and Rhodamine B removal efficiency of monazite monoclinic BiPO4 by hydrothermal route using Bi(NO3)3·5H2O, K2HPO4·3H2O and HNO3 as staring materials were presented in this work. The obtained samples were characterized by X-ray powder diffraction, high-resolution transmission field-emission scanning electron microscopy and diffuse reflectance UV-Vis spectrometry. The results showed that, by selecting suitable reaction parameters, the pure monazite monoclinic phase of BiPO4 was received readily at hydrothermal temperature as low as 130 oC, considerably lower than that reported previously. The obtained monazite monoclinic phase of BiPO4 powders exhibited a high removal efficiency of 96% for 150 min under 365nm-UV irradiation. The mechanism of the Rhodamine B photodegradation reaction over the synthesized monazite monoclinic BiPO4 was also proposed.
{"title":"Low-temperature hydrothermal synthesis of BiPO4 for Rhodamine B removal","authors":"Van Nguyen Duc, Anh Doan Tuan","doi":"10.51316/jca.2022.046","DOIUrl":"https://doi.org/10.51316/jca.2022.046","url":null,"abstract":"The synthesis and Rhodamine B removal efficiency of monazite monoclinic BiPO4 by hydrothermal route using Bi(NO3)3·5H2O, K2HPO4·3H2O and HNO3 as staring materials were presented in this work. The obtained samples were characterized by X-ray powder diffraction, high-resolution transmission field-emission scanning electron microscopy and diffuse reflectance UV-Vis spectrometry. The results showed that, by selecting suitable reaction parameters, the pure monazite monoclinic phase of BiPO4 was received readily at hydrothermal temperature as low as 130 oC, considerably lower than that reported previously. The obtained monazite monoclinic phase of BiPO4 powders exhibited a high removal efficiency of 96% for 150 min under 365nm-UV irradiation. The mechanism of the Rhodamine B photodegradation reaction over the synthesized monazite monoclinic BiPO4 was also proposed.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81066559","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. Nguyen Thanh, Oanh Phung Thi, Hai Nguyen Thanh, Thanh Nguyen Duc, Ly Mai Thi Phuong, An Tran Thi Phuong, Thuy Nguyen Thi, Thanh Dang Van, Huy Nguyen Nhat, Linh Ha Xuan
Clays (especially bentonite) are widely used as barriers in landfills to prevent contamination of subsoil and groundwater by leachate containing heavy metals or toxic organics. However, the future application of bentonite nanomaterials is still limited due to complicated and expensive preparation process requiring several steps, toxic chemical agents, or additional surfactants. In this study, a green approach was proposed to produce bentonite nanoplatelets by an ultrasound-assisted liquid-phase exfoliation method using natural clay minerals containing bentonite as a precursor. The materials were then characterized by SEM, BET, AFM and XRD. The produced material was used to remove methylene blue (MB) from aqueous solution by batch adsorption. Results showed that the bentonite nanoplatelets gave high adsorption ability with Langmuir maximum adsorption capacity of 312.50 mg/g, which could be a good adsorbent for removing dyes and other toxic organics in wastewater.
{"title":"Fabrication of bentonite nanosheets from natural bentonite using ultrasonic-assisted liquid phase exfoliation method and its application for adsorptive removal of Methylene Blue from water","authors":"T. Nguyen Thanh, Oanh Phung Thi, Hai Nguyen Thanh, Thanh Nguyen Duc, Ly Mai Thi Phuong, An Tran Thi Phuong, Thuy Nguyen Thi, Thanh Dang Van, Huy Nguyen Nhat, Linh Ha Xuan","doi":"10.51316/jca.2022.045","DOIUrl":"https://doi.org/10.51316/jca.2022.045","url":null,"abstract":"Clays (especially bentonite) are widely used as barriers in landfills to prevent contamination of subsoil and groundwater by leachate containing heavy metals or toxic organics. However, the future application of bentonite nanomaterials is still limited due to complicated and expensive preparation process requiring several steps, toxic chemical agents, or additional surfactants. In this study, a green approach was proposed to produce bentonite nanoplatelets by an ultrasound-assisted liquid-phase exfoliation method using natural clay minerals containing bentonite as a precursor. The materials were then characterized by SEM, BET, AFM and XRD. The produced material was used to remove methylene blue (MB) from aqueous solution by batch adsorption. Results showed that the bentonite nanoplatelets gave high adsorption ability with Langmuir maximum adsorption capacity of 312.50 mg/g, which could be a good adsorbent for removing dyes and other toxic organics in wastewater.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84149118","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 Le Thi, L. Nguyen Quynh, T. Nguyen Duc, Son Le Thanh, Duc Pham Tien
The present study investigated the photodegradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) in a water environment using synthesized titania nanoparticles (TiO2-NPs). The TiO2-NPs fabricated by sol-gel method were distinguished by X-ray diffraction (XRD) and Transmission electron microscopy (TEM), Infrared spectroscopy (IR), and zeta potential measurements. The results indicated that TiO2 - NPs were nanospheres of appropriately 30nm with a major anatase phase. Synthesized TiO2-NPs have the point of zero charge (PZC) of around 6.0. The efficient conditions for photocatalysis degradation of 2,4-D under sunlight were considered and found to be 120 min, pH 11, and 1 mM KCl. Under ideal conditions, the photodegradation efficiency of 2,4-D reached greater than 72 %. Our results suggest that TiO2-NPs would be promisingly applied for eliminating 2,4-D from an aqueous solution.
{"title":"Photocatalysis degradation of 2,4-dichlorophenoxyacetic acid in water environment using synthesized TiO2 nanoparticles","authors":"Dung Le Thi, L. Nguyen Quynh, T. Nguyen Duc, Son Le Thanh, Duc Pham Tien","doi":"10.51316/jca.2022.048","DOIUrl":"https://doi.org/10.51316/jca.2022.048","url":null,"abstract":"The present study investigated the photodegradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) in a water environment using synthesized titania nanoparticles (TiO2-NPs). The TiO2-NPs fabricated by sol-gel method were distinguished by X-ray diffraction (XRD) and Transmission electron microscopy (TEM), Infrared spectroscopy (IR), and zeta potential measurements. The results indicated that TiO2 - NPs were nanospheres of appropriately 30nm with a major anatase phase. Synthesized TiO2-NPs have the point of zero charge (PZC) of around 6.0. The efficient conditions for photocatalysis degradation of 2,4-D under sunlight were considered and found to be 120 min, pH 11, and 1 mM KCl. Under ideal conditions, the photodegradation efficiency of 2,4-D reached greater than 72 %. Our results suggest that TiO2-NPs would be promisingly applied for eliminating 2,4-D from an aqueous solution.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90430207","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}
Tuan Dang Thanh, Son Nguyen Thi, Hien M. Nguyen, Hanh Cu Hong, Chi Nguyen Thi Thanh, Hung Tran Quang, Huyen Nguyen Thi Thanh, Thuan Ngo Thi, Dang Do Van
An efficient and practical method for the synthesis of pyrroles by Cu-catalyzed multicomponent reaction has been described. A range of highly functionalized pyrroles was prepared in good yields under solvent free condition.
{"title":"Practical Copper-catalyzed Synthesis of Pyrroles under Solvent Free Condition","authors":"Tuan Dang Thanh, Son Nguyen Thi, Hien M. Nguyen, Hanh Cu Hong, Chi Nguyen Thi Thanh, Hung Tran Quang, Huyen Nguyen Thi Thanh, Thuan Ngo Thi, Dang Do Van","doi":"10.51316/jca.2022.050","DOIUrl":"https://doi.org/10.51316/jca.2022.050","url":null,"abstract":"An efficient and practical method for the synthesis of pyrroles by Cu-catalyzed multicomponent reaction has been described. A range of highly functionalized pyrroles was prepared in good yields under solvent free condition.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87103309","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}
Truc Truong Nguyen Nha, Anh Thu Nguyen Hoang, Quyen Chau Ngoc Do, Nam Phan Thanh Son, T. Nguyen Thanh
A method for coupling of benzylamines and 2-nitrobenzonitriles is herein reported. Reactions proceeded in the presence of FeCl3, elemental sulfur, urea, DABCO (1,4-diazabicyclo[2.2.2]octane) base, and DMF solvent. The conditions were compatible with both electron-donating and electron-withdrawing substituents. This tactic appears to be the first method to use a first-row transition metal to promote the synthesis of 2-aryl-4-quinazolinones from commercially available 2-nitrobenzonitriles.
{"title":"Iron sulfide clusters for annulation of 2-nitrobenzonitriles and benzylamines toward synthesis of 2-aryl-4-quinazolinones","authors":"Truc Truong Nguyen Nha, Anh Thu Nguyen Hoang, Quyen Chau Ngoc Do, Nam Phan Thanh Son, T. Nguyen Thanh","doi":"10.51316/jca.2022.042","DOIUrl":"https://doi.org/10.51316/jca.2022.042","url":null,"abstract":"A method for coupling of benzylamines and 2-nitrobenzonitriles is herein reported. Reactions proceeded in the presence of FeCl3, elemental sulfur, urea, DABCO (1,4-diazabicyclo[2.2.2]octane) base, and DMF solvent. The conditions were compatible with both electron-donating and electron-withdrawing substituents. This tactic appears to be the first method to use a first-row transition metal to promote the synthesis of 2-aryl-4-quinazolinones from commercially available 2-nitrobenzonitriles.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82722136","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}
Hien Tran Thị Thu, Hiep Vu Duc, C. Nguyen Van, Hung Khong Manh, Thuy Ly Bich, T. Le Minh
Cordierite is the substrate that posseses a low thermal expansion coefficient, good thermal shock resistance, excellent mechanical properties, and chemical resistance. Thus, cordierite is widely used as substrate for catalysts in high-temperature applications like gaseous treatment. CuMnOx/cordierite catalyst for the complete oxidation of toluene was prepared by the impregnation method and characterized by XRD, BET, IR techniques. This work evaluated the catalytic activity of the prepared catalyst at the temperature range from 150oC to 350oC. It was found that CuMnOx/cordierite catalyst completely converted toluene to CO2 at 350oC. In addition, the mechanism of the toluene oxidation process using CuMnOx/cordierite catalyst was also determined via the indentification of the presentation of the by-products by GC/MS technique at various reaction temperature of 200oC, 250oC, and 350oC. The results showed that the reaction over the CuMnOx/cordierite catalyst followed the same mechanism as proposed by Lars and Andersson. The intermediate products of the oxidation process at 200oC, 250oC, and 350oC were benzyl alcohol, benzaldehyde, benzoic acid, benzene, phenol, 1.4-hydroquinone, 1,4- benzoquinone, and maleic anhydride.
{"title":"Determination of the potential byproduct in the toluene oxidation process by CuMnOx catalyst on cordierite substrate","authors":"Hien Tran Thị Thu, Hiep Vu Duc, C. Nguyen Van, Hung Khong Manh, Thuy Ly Bich, T. Le Minh","doi":"10.51316/jca.2022.041","DOIUrl":"https://doi.org/10.51316/jca.2022.041","url":null,"abstract":"Cordierite is the substrate that posseses a low thermal expansion coefficient, good thermal shock resistance, excellent mechanical properties, and chemical resistance. Thus, cordierite is widely used as substrate for catalysts in high-temperature applications like gaseous treatment. CuMnOx/cordierite catalyst for the complete oxidation of toluene was prepared by the impregnation method and characterized by XRD, BET, IR techniques. This work evaluated the catalytic activity of the prepared catalyst at the temperature range from 150oC to 350oC. It was found that CuMnOx/cordierite catalyst completely converted toluene to CO2 at 350oC. In addition, the mechanism of the toluene oxidation process using CuMnOx/cordierite catalyst was also determined via the indentification of the presentation of the by-products by GC/MS technique at various reaction temperature of 200oC, 250oC, and 350oC. The results showed that the reaction over the CuMnOx/cordierite catalyst followed the same mechanism as proposed by Lars and Andersson. The intermediate products of the oxidation process at 200oC, 250oC, and 350oC were benzyl alcohol, benzaldehyde, benzoic acid, benzene, phenol, 1.4-hydroquinone, 1,4- benzoquinone, and maleic anhydride.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76975547","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 Khoa Phung, Thao T. T. Tran, An Ngo Thanh, K. B. Vu
Ligand-stabilized gold nanoparticles (tetrakis(hydroxymethyl)phosphonium chloride-Au, citrate-Au, cetrimonium bromide-Au) were synthesized and mixed with several weak-base solids (barium carbonate, Amberlite IRA-900) and acidic solid (Dowex 50WX2 resin). Those catalysts were applied for the oxidation of benzyl alcohol in water at 80 oC. Almost ligand-stabilized Au nanoparticles/weak-base solids showed good conversion of benzyl alcohol and high selectivity of benzoic acid, whereas ligand-stabilized Au nanoparticles/acidic solid were catalytically inactive. Nanoparticles were characterized by transmission electron microscopy, zetapotential measurement, and dynamic light scattering. The catalytic activity and product selectivity were determined by using a gas chromatography coupled with a mass selective detector. Our study suggests that the oxidation reaction in water could be catalyzed by gold with the presence of weak-base solids.
{"title":"Oxidation of benzyl alcohol catalyzed by ligand-stabilized Au nanoparticles in the presence of weak bases","authors":"Thanh Khoa Phung, Thao T. T. Tran, An Ngo Thanh, K. B. Vu","doi":"10.51316/jca.2022.043","DOIUrl":"https://doi.org/10.51316/jca.2022.043","url":null,"abstract":"Ligand-stabilized gold nanoparticles (tetrakis(hydroxymethyl)phosphonium chloride-Au, citrate-Au, cetrimonium bromide-Au) were synthesized and mixed with several weak-base solids (barium carbonate, Amberlite IRA-900) and acidic solid (Dowex 50WX2 resin). Those catalysts were applied for the oxidation of benzyl alcohol in water at 80 oC. Almost ligand-stabilized Au nanoparticles/weak-base solids showed good conversion of benzyl alcohol and high selectivity of benzoic acid, whereas ligand-stabilized Au nanoparticles/acidic solid were catalytically inactive. Nanoparticles were characterized by transmission electron microscopy, zetapotential measurement, and dynamic light scattering. The catalytic activity and product selectivity were determined by using a gas chromatography coupled with a mass selective detector. Our study suggests that the oxidation reaction in water could be catalyzed by gold with the presence of weak-base solids.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74095547","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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