Cobalt (Co), as one of the toxic and non-biodegradable heavy metals, has polluted most of the waters, which has an impact on human health and biotic components. Currently, the electrochemical method as a fast, accurate, and reliable technique for detecting heavy metals has been widely developed. Therefore, to obtain results with high accuracy, it is necessary to carry out the analysis under conditions suitable for the heavy metal to be analyzed. In this study, several parameters of Co metal content analysis, such as voltage range, scan rate, and pH were examined using the cyclic voltammetry technique. Metal content analysis using atomic absorption spectrometry was also carried out as a comparison. Based on the results of the analysis of Co metal in the waste solution, it shows that the measurement conditions for the analysis of Co(II) metal are each with a voltage range of 0.75 V to -1.5 V, a scan rate of 200 mV/s, and a pH of 7. The detection limit and quantization limit of Co(II) standard solution are 217.06 mg/L and 723.5 mg/L, respectively, with an RSD of 0.9% and a validity value of the correlation coefficient of 0.9992.
{"title":"Analysis of Co(II) Concentration Using Cyclic Voltammetry Technique","authors":"Shynta Ramadhan, Gayatri Citra Dewi","doi":"10.56425/cma.v1i3.45","DOIUrl":"https://doi.org/10.56425/cma.v1i3.45","url":null,"abstract":"Cobalt (Co), as one of the toxic and non-biodegradable heavy metals, has polluted most of the waters, which has an impact on human health and biotic components. Currently, the electrochemical method as a fast, accurate, and reliable technique for detecting heavy metals has been widely developed. Therefore, to obtain results with high accuracy, it is necessary to carry out the analysis under conditions suitable for the heavy metal to be analyzed. In this study, several parameters of Co metal content analysis, such as voltage range, scan rate, and pH were examined using the cyclic voltammetry technique. Metal content analysis using atomic absorption spectrometry was also carried out as a comparison. Based on the results of the analysis of Co metal in the waste solution, it shows that the measurement conditions for the analysis of Co(II) metal are each with a voltage range of 0.75 V to -1.5 V, a scan rate of 200 mV/s, and a pH of 7. The detection limit and quantization limit of Co(II) standard solution are 217.06 mg/L and 723.5 mg/L, respectively, with an RSD of 0.9% and a validity value of the correlation coefficient of 0.9992.","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85820579","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}
Ranggaweny Al-Ghani, Wita Putri Nirwani, Tria Nurwina Novianti, Adani Ghina Puspita Sari
Usnea misaminensis is an epiphytic medicinal plant from Indonesia that has several benefits, one of which is as an anti-inflammatory. This study aims to predict the ability of three compounds from Usnea misaminensis to inhibit the COX-2 enzyme as a source of prostaglandins using molecular docking. Receptors obtained from RSCB with PDB ID:5IKR were then prepared on UCSF Chimera 1.16 and the ligands (usnic acid, salizinic acid, and evernic acid) were downloaded 2D structure in .pdbqt format from PubChem. Docking simulation is done via AutoDock Vina 1.1.2 embedded in AutoDockTools 1.5.7. The docking results are visualized using PyMOL 2.5.2 and Biovia Discovery Studio Visualizer. Evernic acid showed binding energy (-6.8 kcal/mol) to the COX-2 receptor which was close to the binding energy value of the control ligand. Usnic acid and salazinic acid showed interactions with the same SER530 residue as the reference ligand. Compounds containing anti-inflammatory effects have the lowest binding energy and bind to residues as reference ligands. These results indicate that the compounds from Usnea misaminensis have potential as anti-inflammatory agents, but further research is needed to examine the potential anti-inflammatory activities.
{"title":"In Silico Anti-Inflammatory Activity Evaluation from Usnea misaminensis through Molecular Docking Approach","authors":"Ranggaweny Al-Ghani, Wita Putri Nirwani, Tria Nurwina Novianti, Adani Ghina Puspita Sari","doi":"10.56425/cma.v1i3.40","DOIUrl":"https://doi.org/10.56425/cma.v1i3.40","url":null,"abstract":"Usnea misaminensis is an epiphytic medicinal plant from Indonesia that has several benefits, one of which is as an anti-inflammatory. This study aims to predict the ability of three compounds from Usnea misaminensis to inhibit the COX-2 enzyme as a source of prostaglandins using molecular docking. Receptors obtained from RSCB with PDB ID:5IKR were then prepared on UCSF Chimera 1.16 and the ligands (usnic acid, salizinic acid, and evernic acid) were downloaded 2D structure in .pdbqt format from PubChem. Docking simulation is done via AutoDock Vina 1.1.2 embedded in AutoDockTools 1.5.7. The docking results are visualized using PyMOL 2.5.2 and Biovia Discovery Studio Visualizer. Evernic acid showed binding energy (-6.8 kcal/mol) to the COX-2 receptor which was close to the binding energy value of the control ligand. Usnic acid and salazinic acid showed interactions with the same SER530 residue as the reference ligand. Compounds containing anti-inflammatory effects have the lowest binding energy and bind to residues as reference ligands. These results indicate that the compounds from Usnea misaminensis have potential as anti-inflammatory agents, but further research is needed to examine the potential anti-inflammatory activities.","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74290411","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}
Zero-valent iron nanoparticles (nZVI) were successfully synthesized by metal salt reduction method using cinnamon as a reductor agent. Particle size analysis showed that the most optimum composition of FeSO4 and polyphenols was at a ratio of 4:1, resulting in Dv(10), Dv(50), and Dv(90) values of 23.7 nm, 44.6 nm, and 178 nm, respectively. Scanning electron microscopy showed that nZVI was spherical and agglomerated. X-ray diffraction pattern showed a peak at 45.03˚ that corresponds to nZVI. The batch test showed that nZVI has Ni(II) and Cr(VI) adsorption activity of 95.58% Ni and 64.29%, respectively.
{"title":"Green Synthesis of Nanoscale Zero-Valent Iron and Its Activity as an Adsorbent for Ni(II) and Cr(VI)","authors":"N. Apriliani","doi":"10.56425/cma.v1i3.29","DOIUrl":"https://doi.org/10.56425/cma.v1i3.29","url":null,"abstract":"Zero-valent iron nanoparticles (nZVI) were successfully synthesized by metal salt reduction method using cinnamon as a reductor agent. Particle size analysis showed that the most optimum composition of FeSO4 and polyphenols was at a ratio of 4:1, resulting in Dv(10), Dv(50), and Dv(90) values of 23.7 nm, 44.6 nm, and 178 nm, respectively. Scanning electron microscopy showed that nZVI was spherical and agglomerated. X-ray diffraction pattern showed a peak at 45.03˚ that corresponds to nZVI. The batch test showed that nZVI has Ni(II) and Cr(VI) adsorption activity of 95.58% Ni and 64.29%, respectively.","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73299103","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}
Anaheed A. Yaseen, D. Ahmed, Dhuha H. Fadhil, M. Kadhom, Muna S. Bufaroosha, Emaad T. B. Al‐Tikrity, E. Yousif
Poly(vinyl chloride) (PVC) could be considered as one of the highly manufactured plastics with a production capacity of multiple millions tons per year. Fillers are recently added to PVC in an attempt to increase its applications in various sectors, especially at tough exposing conditions. Therefore, the current work reports the morphological studies of PVC sheets that contain trimethoprim-tin complexes as additives. The PVC was blended with a low concentration of trimethoprim-tin complexes and thin films have been prepared from the homogenous mixtures. The ultraviolet irritation impact on the morphology and physicochemical properties of the films was studied. It was found that the photodecomposition and photo-oxidation levels of PVC films were lower than the blank film’s ones. The TEM images showed that the undesirable changes in the surface of irradiated PVC films, such as the appearance of dark spots, cracks, and roughness, were minimized once the tin complexes were filled compared with the blank PVC.
{"title":"TEM Study of Irradiated PVC Embedded with Tin Complexes of Heterocyclic and Aromatic Moieties","authors":"Anaheed A. Yaseen, D. Ahmed, Dhuha H. Fadhil, M. Kadhom, Muna S. Bufaroosha, Emaad T. B. Al‐Tikrity, E. Yousif","doi":"10.56425/cma.v1i3.30","DOIUrl":"https://doi.org/10.56425/cma.v1i3.30","url":null,"abstract":"Poly(vinyl chloride) (PVC) could be considered as one of the highly manufactured plastics with a production capacity of multiple millions tons per year. Fillers are recently added to PVC in an attempt to increase its applications in various sectors, especially at tough exposing conditions. Therefore, the current work reports the morphological studies of PVC sheets that contain trimethoprim-tin complexes as additives. The PVC was blended with a low concentration of trimethoprim-tin complexes and thin films have been prepared from the homogenous mixtures. The ultraviolet irritation impact on the morphology and physicochemical properties of the films was studied. It was found that the photodecomposition and photo-oxidation levels of PVC films were lower than the blank film’s ones. The TEM images showed that the undesirable changes in the surface of irradiated PVC films, such as the appearance of dark spots, cracks, and roughness, were minimized once the tin complexes were filled compared with the blank PVC.","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78246333","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}
{"title":"Evaluation of the Phytochemical Properties of Eucalyptus Citriodora Exudates and its Potency as Coagulant in Water Purification","authors":"","doi":"10.7176/cmr/14-4-03","DOIUrl":"https://doi.org/10.7176/cmr/14-4-03","url":null,"abstract":"","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90605624","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}
{"title":"Co-Precipitation Synthesis of MnFe2O4 and CoFe2O4 Nanoparticles","authors":"","doi":"10.7176/cmr/14-3-03","DOIUrl":"https://doi.org/10.7176/cmr/14-3-03","url":null,"abstract":"","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77862446","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}
{"title":"Retrospect on Zirconium Laves Phases ZrZn2 and ZrAl2 with Their Physicochemical Properties and Perspective for Possible Hydrogen Storage Reactions","authors":"","doi":"10.7176/cmr/14-3-04","DOIUrl":"https://doi.org/10.7176/cmr/14-3-04","url":null,"abstract":"","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88075372","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}
Ananda Ico Novtiar Turmiasaputri, Erfan Handoko, S. Budi
This paper reports the effect of temperature and electrolyte pH on the electrodeposition of FeCoNi film. The FeCoNi electrodeposition was carried out from sulfate solution using the potentiostatic technique. The higher temperature increased deposition rate, thickness of the deposit, and size of the FeCoNi crystallites. The obtained FeCoNi films were characterized by X-ray diffractometer (XRD) and energy dispersive X-Ray (EDX). XRD analysis confirmed typical diffraction patterns of awaruite phase. EDX evaluation indicated that the relative weight increases in pH from 2.5 to 4, the composition of wt% Fe deposited increased from 39.2% to 47.9%, while wt% Co and wt% Ni decreased from 36.2% to 33.5 % and 24.6% to 18.6%.
{"title":"The Effect of Temperature and pH on FeCoNi Film Electrodeposition","authors":"Ananda Ico Novtiar Turmiasaputri, Erfan Handoko, S. Budi","doi":"10.56425/cma.v1i2.25","DOIUrl":"https://doi.org/10.56425/cma.v1i2.25","url":null,"abstract":"This paper reports the effect of temperature and electrolyte pH on the electrodeposition of FeCoNi film. The FeCoNi electrodeposition was carried out from sulfate solution using the potentiostatic technique. The higher temperature increased deposition rate, thickness of the deposit, and size of the FeCoNi crystallites. The obtained FeCoNi films were characterized by X-ray diffractometer (XRD) and energy dispersive X-Ray (EDX). XRD analysis confirmed typical diffraction patterns of awaruite phase. EDX evaluation indicated that the relative weight increases in pH from 2.5 to 4, the composition of wt% Fe deposited increased from 39.2% to 47.9%, while wt% Co and wt% Ni decreased from 36.2% to 33.5 % and 24.6% to 18.6%.","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77592130","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}
This study aims to synthesize zero-valent iron (ZVI) with green-chemistry method. Synthesis was performed by reducing Fe2+ ion using polyphenol extract. The extract was obtained from banana peel that abundant in Indonesia and contain high of polyphenols. Synthesis of ZVI was carried out by reacting polyphenol extract to FeSO4 solution with different composition 1:4, 2:3, 1:1, 3:2, 4:1, and 4.5:0.5. The gas chromatography-mass spectroscopy spectrum confirmed the existence of polyphenols in the banana feel extract from the observed peaks assigned to 2-methoxy-4-vinylphenol, 4 methoxy-2-vinylphenol, and 2-methoxy-5-vinylphenol. Based on the atomic absorbtion spectroscopy data, the best composition for ZVI’s synthesis was 4:1 (polyphenol extract : FeSO4 solution). The fourier transform infrared spectroscopy spectrum shows that there was –OH group indicating a present of polyphenol in the synthesized ZVI. The energy dispersive X-ray spectroscopy shows that the sample contain of Fe, C, O, S, Ca, Cu, and Na. The X-ray diffraction analysis exhibit crystalline phase of a simple cubic structure of the synthesized ZVI. This results shows that the ZVI was successfully synthesized using environmentally benign reducing agent extracted from the banana peel.
{"title":"Synthesis and Characterization of Zero-Valent Iron Using Polyphenols Extracted from Kepok Banana Peel (Musa paradisiaca Normalis)","authors":"Saul Panjaitan, F. Kurniadewi, S. Budi","doi":"10.56425/cma.v1i2.28","DOIUrl":"https://doi.org/10.56425/cma.v1i2.28","url":null,"abstract":"This study aims to synthesize zero-valent iron (ZVI) with green-chemistry method. Synthesis was performed by reducing Fe2+ ion using polyphenol extract. The extract was obtained from banana peel that abundant in Indonesia and contain high of polyphenols. Synthesis of ZVI was carried out by reacting polyphenol extract to FeSO4 solution with different composition 1:4, 2:3, 1:1, 3:2, 4:1, and 4.5:0.5. The gas chromatography-mass spectroscopy spectrum confirmed the existence of polyphenols in the banana feel extract from the observed peaks assigned to 2-methoxy-4-vinylphenol, 4 methoxy-2-vinylphenol, and 2-methoxy-5-vinylphenol. Based on the atomic absorbtion spectroscopy data, the best composition for ZVI’s synthesis was 4:1 (polyphenol extract : FeSO4 solution). The fourier transform infrared spectroscopy spectrum shows that there was –OH group indicating a present of polyphenol in the synthesized ZVI. The energy dispersive X-ray spectroscopy shows that the sample contain of Fe, C, O, S, Ca, Cu, and Na. The X-ray diffraction analysis exhibit crystalline phase of a simple cubic structure of the synthesized ZVI. This results shows that the ZVI was successfully synthesized using environmentally benign reducing agent extracted from the banana peel.","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86586482","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}
This research was conducted to determine the effect of solution variations, electrical current, thickness, weight, metal composition, and the characteristics of the Fe-Ni alloy synthesized using the electrodeposition method. The instruments used in this study were atomic absorption spectroscopy (AAS) to determine the metal composition in the deposit, X-ray diffraction to determine the diffraction patterns, and scanning electron microscopy (SEM) to observe morphology and energy dispersive X-ray spectroscopy for elemental analysis. The SEM micrographs obtained showed that morphology of the Fe-Ni alloy was in the form of refined grains. The percentage of Fe in the deposit decreases with the increase in the used current. The AAS data also showed that a high Ni composition in solution will affect the atomic percent of each metal in the deposit. The formation of the alloy was confirmed by diffraction peaks at 2θ of 44°, 53°, and 76° that associated with reflection planes of the face centered cubic structure of Fe-Ni with the crystallite size range from 5 nm to 35 nm.
{"title":"The Effect of Electrodeposition Current and Electrolyte Composition on Electrodeposition of Fe-Ni Alloys","authors":"Ghina Imani Rofi, Maria Paristiowati","doi":"10.56425/cma.v1i2.27","DOIUrl":"https://doi.org/10.56425/cma.v1i2.27","url":null,"abstract":"This research was conducted to determine the effect of solution variations, electrical current, thickness, weight, metal composition, and the characteristics of the Fe-Ni alloy synthesized using the electrodeposition method. The instruments used in this study were atomic absorption spectroscopy (AAS) to determine the metal composition in the deposit, X-ray diffraction to determine the diffraction patterns, and scanning electron microscopy (SEM) to observe morphology and energy dispersive X-ray spectroscopy for elemental analysis. The SEM micrographs obtained showed that morphology of the Fe-Ni alloy was in the form of refined grains. The percentage of Fe in the deposit decreases with the increase in the used current. The AAS data also showed that a high Ni composition in solution will affect the atomic percent of each metal in the deposit. The formation of the alloy was confirmed by diffraction peaks at 2θ of 44°, 53°, and 76° that associated with reflection planes of the face centered cubic structure of Fe-Ni with the crystallite size range from 5 nm to 35 nm.","PeriodicalId":9724,"journal":{"name":"chemistry and materials research","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74679123","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：