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Vietnam Journal of Catalysis and Adsorption最新文献

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Investigation of photodegradation of 2,4-Dichlorophenoxyacetic acid on Cu2O/g-C3N4 catalysts Cu2O/g-C3N4催化剂光降解2,4-二氯苯氧乙酸的研究
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-16 DOI: 10.51316/jca.2022.056
Son Le Thanh, Binh Nguyen Thanh, Dang Do Van, Long Dang Van
{"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}
引用次数: 0
A comparative study on the photodegradation of methyl orange, methylene blue using Fe2O3, Mn2O3, and Fe2O3 – Mn2O3 nanomaterials Fe2O3、Mn2O3和Fe2O3 - Mn2O3纳米材料光降解甲基橙、亚甲基蓝的比较研究
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-16 DOI: 10.51316/jca.2022.051
Mai Nguyen Vu Ngoc, Hung Le Bao, Chuc Pham Ngoc, Lim Duong Thi, Bac Nguyen Quang, Lam Tran Dai
{"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}
引用次数: 0
Dyes adsorption properties of odered mesoporous carbon material using mcf silica as hard template 以二氧化硅为硬模板的有序介孔碳材料对染料的吸附性能
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-12 DOI: 10.51316/jca.2022.047
H. Nguyen, Linh Thi Kim Linh, Quy M. Bui, P. Dang
{"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}
引用次数: 0
Low-temperature hydrothermal synthesis of BiPO4 for Rhodamine B removal 低温水热合成BiPO4去除罗丹明B
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-12 DOI: 10.51316/jca.2022.046
Van Nguyen Duc, Anh Doan Tuan
{"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}
引用次数: 0
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 超声波辅助液相剥脱法制备膨润土纳米片及其在水中吸附去除亚甲基蓝中的应用
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-12 DOI: 10.51316/jca.2022.045
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
{"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}
引用次数: 0
Photocatalysis degradation of 2,4-dichlorophenoxyacetic acid in water environment using synthesized TiO2 nanoparticles 合成TiO2纳米颗粒光催化降解水中2,4-二氯苯氧乙酸
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-12 DOI: 10.51316/jca.2022.048
Dung Le Thi, L. Nguyen Quynh, T. Nguyen Duc, Son Le Thanh, Duc Pham Tien
{"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}
引用次数: 0
Practical Copper-catalyzed Synthesis of Pyrroles under Solvent Free Condition 无溶剂条件下铜催化合成吡咯的实用研究
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-12 DOI: 10.51316/jca.2022.050
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
{"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}
引用次数: 0
Iron sulfide clusters for annulation of 2-nitrobenzonitriles and benzylamines toward synthesis of 2-aryl-4-quinazolinones 2-硝基苯并腈和苯胺环接的硫化铁簇用于合成2-芳基-4-喹唑啉酮
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-12 DOI: 10.51316/jca.2022.042
Truc Truong Nguyen Nha, Anh Thu Nguyen Hoang, Quyen Chau Ngoc Do, Nam Phan Thanh Son, T. Nguyen Thanh
{"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}
引用次数: 0
Determination of the potential byproduct in the toluene oxidation process by CuMnOx catalyst on cordierite substrate 堇青石基质上CuMnOx催化剂氧化甲苯过程中潜在副产物的测定
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-12 DOI: 10.51316/jca.2022.041
Hien Tran Thị Thu, Hiep Vu Duc, C. Nguyen Van, Hung Khong Manh, Thuy Ly Bich, T. Le Minh
{"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}
引用次数: 0
Oxidation of benzyl alcohol catalyzed by ligand-stabilized Au nanoparticles in the presence of weak bases 弱碱存在下配体稳定金纳米颗粒催化苯甲醇氧化
Vietnam Journal of Catalysis and Adsorption Pub Date : 2022-10-12 DOI: 10.51316/jca.2022.043
Thanh Khoa Phung, Thao T. T. Tran, An Ngo Thanh, K. B. Vu
{"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}
引用次数: 1
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