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Vietnam Journal of Catalysis and Adsorption最新文献

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Polymerization of Thermo-Responsive Poly(N-vinylcaprolactam): Effects of Temperature, Initiator and Monomer Concentration on Percent Conversion 热响应聚（N-乙烯基己内酰胺）的聚合：温度、引发剂和单体浓度对转化率的影响
Vietnam Journal of Catalysis and Adsorption Pub Date : 2024-03-09 DOI: 10.62239/jca.2023.072
Hoang Thi Thuy, Cao Hong Ha, Phung Anh Tuan
{"title":"Polymerization of Thermo-Responsive Poly(N-vinylcaprolactam): Effects of Temperature, Initiator and Monomer Concentration on Percent Conversion","authors":"Hoang Thi Thuy, Cao Hong Ha, Phung Anh Tuan","doi":"10.62239/jca.2023.072","DOIUrl":"https://doi.org/10.62239/jca.2023.072","url":null,"abstract":"Poly(N-vinyl caprolactam) (PNVCL) is a thermally responsive polymer. Its temperature-responsive properties make it an attractive candidate for various applications. A series of temperature-sensitive PNVCL were synthesized through free radical polymerization, using various of amount of Azobisisobutyronitrile (AIBN) as initiator agent and with reaction temperatures set at 60oC, 70oC, 80oC. The percent conversion of polymerization was determined using the Hubl method to investigate the effects of three factors: initiator agent concentration, monomer concentration and reaction temperature. Furthermore, the chemical structure and the responsiveness of the PNVCL polymer were analyzed using Fourier transform infrared spectroscopy (FTIR) and UV-vis spectrometer, respectively. The study revealed that increasing the reaction temperature, initiator concentration, and monomer concentration resulted in higher percent conversion of polymerization. Finally, the obtained polymer demonstrated thermal sensitivity within the range of 32oC to 38oC, which is close to human body temperature, suitable for biomedical applications.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"148 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256499","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
Study structure characteristics and the photocatalytic degradation of Rhodamine B on C/g-C3N4 composites 研究 C/g-C3N4 复合材料的结构特征及其对罗丹明 B 的光催化降解作用
Vietnam Journal of Catalysis and Adsorption Pub Date : 2024-03-09 DOI: 10.62239/jca.2023.064
Phan Thi Thuy Trang, Kim Thi Thu Hoa, Nguyen Thi Thanh Binh, Nguyen Tan Lam, Hoang Duc An, Le Duy Thanh, Truong Cong Duc, Vo Vien, Nguyen Thi Lan
{"title":"Study structure characteristics and the photocatalytic degradation of Rhodamine B on C/g-C3N4 composites","authors":"Phan Thi Thuy Trang, Kim Thi Thu Hoa, Nguyen Thi Thanh Binh, Nguyen Tan Lam, Hoang Duc An, Le Duy Thanh, Truong Cong Duc, Vo Vien, Nguyen Thi Lan","doi":"10.62239/jca.2023.064","DOIUrl":"https://doi.org/10.62239/jca.2023.064","url":null,"abstract":"C/g-C3N4 composites were successfully synthesized by calcination method from precursors g-C3N4 (CN) with carbon from orange peel (OC). The products were characterized by physicochemical methods such as XRD, IR, SEM, BET, UV-Vis. The photocatalytic activity of the material was evaluated through the degradation of RhB in the visible light. Experimental results show that the OC/CN-150 composite exhibits the optimal catalytic activity of 90% after 1 hour of illumination. This study highlights the role of carbon synthesized from biomass sources. Besides, it can be combined with other materials to create composites to apply for photocatalysis to solve environmental problems.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"174 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256435","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
Research and application of nano zeolite NaX as adsorbent in poor quality diesel fuel treatment 纳米沸石NaX吸附剂在劣质柴油处理中的研究与应用
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.032
D. N. Ta, B. X. Trinh, Anh Lan Thi Ha, Huy Thien Ngoc Ta, Quang Viet Nguyen
{"title":"Research and application of nano zeolite NaX as adsorbent in poor quality diesel fuel treatment","authors":"D. N. Ta, B. X. Trinh, Anh Lan Thi Ha, Huy Thien Ngoc Ta, Quang Viet Nguyen","doi":"10.51316/jca.2023.032","DOIUrl":"https://doi.org/10.51316/jca.2023.032","url":null,"abstract":"This paper presents the results of research on treatment of poor quality diesel fuel generated during the operation of marine vessels by adsorption method with nano zeolite NaX adsorbent which is synthesized directly from Vietnamese rice husk and kaolin. The diesel fuel samples were analyzed and evaluated according to the technical criteria of TCVN 5689 and GOST 305. The obtained results proved that the poor quality diesel samples after being treated with nano zeolite NaX adsorbent can be reused as fuel for ships.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78692582","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
The catalytic activity of manganese oxide catalysts for the toluene oxidation process 锰氧化物催化剂对甲苯氧化过程的催化活性
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.039
H. T. Tran, Chuc Van Nguyen, Thuy T B Ly, Quang Dinh Ta, H. T. Nguyen, Hung Manh Khong, Thang Minh Le
{"title":"The catalytic activity of manganese oxide catalysts for the toluene oxidation process","authors":"H. T. Tran, Chuc Van Nguyen, Thuy T B Ly, Quang Dinh Ta, H. T. Nguyen, Hung Manh Khong, Thang Minh Le","doi":"10.51316/jca.2023.039","DOIUrl":"https://doi.org/10.51316/jca.2023.039","url":null,"abstract":"Manganese oxide catalysts were prepared by several preparation methods, such as hydrothermal, sol-gel method, and characterized by XRD, BET, H2-TPR, SEM-EDS, and FT-IR. The catalytic activities of catalysts were evaluated through the toluene reaction at the temperature range of 150 oC – 400 oC. Among the catalysts, the @ MnO2 150  catalyst exhibited the highest catalytic activity. It could completely convert toluene into CO2 at 300  oC. The larger specific surface area and lower reduction temperature enhance the higher activity of the @ MnO2 150 catalyst. Thus, the @ MnO2 150  catalyst is chosen to study in the subsequent research.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77954766","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
Study on synthesis and characterization of electrocatalyst containing platinum on graphite electrode for hydrogen evolution reaction 石墨电极含铂析氢电催化剂的合成及表征研究
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.040
H. Nguyen, T. Nguyen, Thuc Van Nguyen
{"title":"Study on synthesis and characterization of electrocatalyst containing platinum on graphite electrode for hydrogen evolution reaction","authors":"H. Nguyen, T. Nguyen, Thuc Van Nguyen","doi":"10.51316/jca.2023.040","DOIUrl":"https://doi.org/10.51316/jca.2023.040","url":null,"abstract":"In this study, we have successfully synthesized electrode materials containing Pt on modified graphite by electrodeposition method, such as: Pt/C, Pt-Au/C Pt-Pd/C, Pt-Ni/C, Pt-Ni-Au/C, Pt-Ni-Pd/C. The formation of materials coating on the modified graphite surface is demonstrated through SEM, EDS results. Synthetic materials are used as catalysts for hydrogen evolution reaction (HER). The results show that Bimetallic composites containing Pt exhibit higher catalytic activity than the monometallic material Pt/C. Trimetallic materials Pt-Ni-Au/C and Pt-Ni-Pd/C have catalytic activity for HER insignificant lower than that of Pt-Au/C and Pt-Pd/C electrodes.  However, the precious metal composition in the trimetallic composite material system is reduced, which is also an important goal of research and opens up prospects for the fabrication of next-generation composite materials systems.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72562474","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
Modifying platinum microelectrodes with electrochemically reduced graphene oxide for application in electrochemical ascorbic acid sensor 用电化学还原氧化石墨烯改性铂微电极以应用于抗坏血酸电化学传感器
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.034
L. T. Tran, Hoang Vinh Tran
{"title":"Modifying platinum microelectrodes with electrochemically reduced graphene oxide for application in electrochemical ascorbic acid sensor","authors":"L. T. Tran, Hoang Vinh Tran","doi":"10.51316/jca.2023.034","DOIUrl":"https://doi.org/10.51316/jca.2023.034","url":null,"abstract":"Graphene oxide drop-casted on a platinum microelectrode was successfully changed to reduced graphene oxide by using a cyclic voltammetry method. The presence of an electrochemically reduced graphene oxide layer on the platinum electrode was proved by using scanning electron microscopy images, Raman and Fourier-transform infrared spectroscopy spectra. Cyclic voltammetry and linear sweep voltammetry results indicated that the platinum microelectrode modified with electrochemically reduced graphene oxide can be used as an electrochemical sensor for detection of ascorbic acid in aqueous solutions. In a cyclic voltammetry scan and a linear sweep voltammetry curve corresponding to the presence of ascorbic acid, a peak related to the direct oxidation of ascorbic acid appears. The electrochemical sensor based on the electrochemically reduced graphene oxide material works effectively with a detection limit of 0.04 mM, a detection linear range from 0.04 mM to 1.0 mM, a good repeatability, and especially, a rapid detection time thanks to a direct ascorbic acid detection based on the oxidation of ascorbic acid.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139360316","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
Study on the synthesis and properties of porous cadmium zeolitic imidazolate framework for environmental treatment 用于环境治理的多孔镉唑咪唑框架的合成与性能研究
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.033
H. Ninh, Duong Duc La, Phuong Hoai Thi Nguyen
{"title":"Study on the synthesis and properties of porous cadmium zeolitic imidazolate framework for environmental treatment","authors":"H. Ninh, Duong Duc La, Phuong Hoai Thi Nguyen","doi":"10.51316/jca.2023.033","DOIUrl":"https://doi.org/10.51316/jca.2023.033","url":null,"abstract":"In this study, cadmium imidazolate frameworks were synthesized by a solvothermal method from cadmium acetate and 2-methylimidazole in an ethanol/methanol mixture. The Cd(Im)2 processed at 150 oC after 8 hours with the mixture of solvents has high crystallinity. The appearance of the absorption band at 407.73 cm-1 shows a link formation of Cd (II) and N within HIm’s molecule. Cadmium imidazolate only formats zeolite crystal, the network fibers were potent, and the pores were alike. The dimension of pores is approximately 200 nm. The XRD diagram shows that the Cd(Im)2 has high crystallinity. The Cd(Im)2 phase is obvious from reflections at 7o, 10o, 12o, 14o, 15,6o and 17o. The surface area of Cd(Im)2 was 662.894 m2/g or 858.389 m²/g with BET or Langmuir calculations, respectively. The maximum adsorption capacity of Cd-ZIF-8 for the RhB is 64.52 mg.g-1, and the adsorption data were fitted well with a pseudo-second-order model.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139360515","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
The synthesis of γ-MnOOH nanorods as an efficient electrocatalyst for urea oxidation 尿素氧化高效电催化剂γ-MnOOH纳米棒的合成
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.038
Minh Tuan Nguyen Dinh, Huy Thai Thanh Le, Trung Hieu Thanh Le, Chinh Chien Nguyen
{"title":"The synthesis of γ-MnOOH nanorods as an efficient electrocatalyst for urea oxidation","authors":"Minh Tuan Nguyen Dinh, Huy Thai Thanh Le, Trung Hieu Thanh Le, Chinh Chien Nguyen","doi":"10.51316/jca.2023.038","DOIUrl":"https://doi.org/10.51316/jca.2023.038","url":null,"abstract":"In this study, γ-MnOOH nanorods synthesized by polysaccharide- assisted hydrothermal method as an efficient electrocatalyst for urea oxidation. The γ-MnOOH structure and morphology are confirmed by X-ray diffraction and scanning electron microscopy (SEM). The γ-MnOOH material, which contains hydroxyl groups and has an average oxidation state of Mn of three as demonstrated by XPS, exhibits excellent electrocatalytic activity towards urea oxidation reaction (UOR) compared to bare nickel foam (NF). Specifically, the overpotential at 10 mA/cm2 for γ-MnOOH is found to be 1.05 V, which is significantly lower than that of the NF (i.e., 1.12 V). Notably, the UOR over γ-MnOOH has a potential that is 180 mV lower than observed during the oxygen evolution reaction (OER) using the same electrode. These findings suggest that the γ-MnOOH nanorods could serve as a promising electro-catalyst for UOR in various energy storage and conversion applications.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"172 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83535995","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
Effect of pH on the photo-Fenton degradation of rhodamine B by Prussian blue/g-C3N4 pH 值对普鲁士蓝/g-C3N4 光 Fenton 降解罗丹明 B 的影响
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.035
Trang Thuy Thi Phan, Lan Thi Nguyen
{"title":"Effect of pH on the photo-Fenton degradation of rhodamine B by Prussian blue/g-C3N4","authors":"Trang Thuy Thi Phan, Lan Thi Nguyen","doi":"10.51316/jca.2023.035","DOIUrl":"https://doi.org/10.51316/jca.2023.035","url":null,"abstract":"The pH solution is one of the critical factors affecting the photo-Fenton degradation of dyes in wastewater. The photoactivity of Prussian blue/g-C3N4 was investigated using the photodegradation of RhB acidic, neutral, and essential medium. The results implicated that more than 98.5% removal of RhB was achieved at pH = 3.62 after irradiation for 60 minutes under visible light. The photocatalytic activity of Prussian blue/g-C3N4 showed the best performance in an acidic medium. This is due to the formation of hydroxyl radicals during the photocatalytic degradation of RhB. Thus, this study has shown the role and potential of the application of photocatalysts in the degradation of toxic organic compounds the wastewater.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139360328","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
Highly adsorptive removal of oxytetracycline in water environment using polyanion modified alumina nanoparticles 聚阴离子修饰氧化铝纳米颗粒对水环境中土霉素的高效吸附去除
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.030
Diu Thi Dinh, Han Bao Nguyen, D. Pham
{"title":"Highly adsorptive removal of oxytetracycline in water environment using polyanion modified alumina nanoparticles","authors":"Diu Thi Dinh, Han Bao Nguyen, D. Pham","doi":"10.51316/jca.2023.030","DOIUrl":"https://doi.org/10.51316/jca.2023.030","url":null,"abstract":"In this study, adsorptive removal of an antibiotic oxytetracycline (OTC) using polyanion poly(2-acrylamide-2-methylpropane sulfonic acid), PAMPs modified α-Al2O3 nanoparticles (PAMNA) was investigated. Surface modification of α-Al2O3 nanoparticles by PAMPs enhanced the removal efficiency of OTC significantly from 35.5 to 90.7 %. The optimum conditions for adsorptive removal of OTC using PAMNA were found to be pH 4, contact time 120 min and adsorbent dosage 20 mg/mL. Under selected conditions, the removal efficiency of OTC using PAMNA was greater than 90 % while the maximum adsorption capacity reached 140.2 mg/g. After three regenerations, the removal efficiencies of OTC were still higher than 75 %. The results of adsorption isotherms of OTC on PAMNA and the surface charge change of PAMNA indicate that both electrostatic and non-electrostatic interactions control OTC adsorption on PAMNA.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85270833","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
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