by Ketan Jangir, Umesh Kumar, Naveen Kumar Suniya, Naginder Singh and Kapil Parihar
Original Research
Today, there is much demand for stabilised foam globally. The primary concern for surfactant foam in enhanced oil recovery (EOR) is its foam stability. The applications of surfactant-nanoparticles mixture for foam stabilisation have been increased significantly because of the combined role of nanoparticles (NPs) and surfactant in the mechanism of foam stabilisation. This paper focuses on enhancing the aqueous foam stability by NPs and respective mechanisms of the aqueous foam stability. Nanoparticles have unique physical and chemical properties, so they alter the surface and rheological properties of the fluid system. It is the outcome of various research that nanoparticles adhere to the gas-liquid interface of the foam to improve foam stability. Therefore, NPs can enhance the stability of surfactant-stabilised foams. The use of nanoparticles increases foam stability, but its drawbacks cannot be ignored. Probable, the synthesis and production technique of nanoparticles is steeply-priced, which have to be made cheap using cutting-edge technology.
World Journal of Chemical Education. 2022, 10(2), 84-90. DOI: 10.12691/wjce-10-2-5
Pub. Date: June 06, 2022
1756 Views1 Downloads
by Sahi Ram and Shailndra Singh
Original Research
Rare earth dysprosium substituted spinel ferrites with a composition of Zn0.5Mg0.5DyxFe2-xO4 (x = 0.0, 0.02, 0.10 and 0.20) were synthesized by the solid-state reaction method. X-ray diffraction studies revealed the formation of single-phase cubic structures for all compositions. The lattice constant and crystallite size varied with increasing Dy3+ content in the Zn-Mg ferrite. 57Fe Mössbauer spectroscopic studies were carried out to determine the chemical state of iron, its occupancy and relative amount in tetrahedral (A) sites, octahedral (B) sites or both. The obtained value of relative amount of iron in the tetrahedral (A) site, octahedral (B) site or both was used to obtain the cation distribution at the tetrahedral (A) and octahedral (B) sites. The cation distribution was used to determine the cation-cation distances, cation-anion distances and inter-ionic bond angles to understand the spin interactions and the impact of Dy3+ ion substitution on magnetic interactions in substituted Zn-Mg ferrites.
World Journal of Chemical Education. 2022, 10(2), 76-83. DOI: 10.12691/wjce-10-2-4
Pub. Date: May 19, 2022
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by Timm A. Knoerzer and Todd A. Davis
Original Research
Student engaged learning has been at the forefront of chemical education for the past several decades. Improving student engagement leads to increased retention of information being presented in lecture and laboratory-based settings. With this goal in mind, three laboratory-based learning modules were developed to address difficult learning areas in organic chemistry (acid/base/extractions, substitution reactions, and aromaticity). These data-driven modules focus on students using critical thinking skills to analyze data and answer guided questions in these trouble areas. The implementation of modules and an evaluation of effectiveness are presented.
World Journal of Chemical Education. 2022, 10(2), 65-75. DOI: 10.12691/wjce-10-2-3
Pub. Date: May 12, 2022
2102 Views1 Downloads
by Sharda Mahilkar Sonkar, Sujata Sengupta, Shivani Singh and Anshika Lumb
Original Research
Alcohol is one of the functional groups detected as part of qualitative organic analysis. The final identification of alcohol involves the preparation of suitable crystalline derivative, usually the 3,5-dinitrobenzoate. According to the standard procedure, 3,5-dinitrobenzoic acid is first converted to 3,5-dinitrobenzoyl chloride by reaction with either phosphorous pentachloride (PCl5) or thionyl chloride (SOCl2). However, in this reaction, hazardous side products like phosphorous oxychloride (POCl3), hydrochloric acid (HCl) and sulphur dioxide (SO2) are produced. In the present method, we report the direct and benign conversion of alcohols to the corresponding 3,5-dinitrobenzoates using ionic liquid, (bmim)HSO4 under microwave irradiation.
World Journal of Chemical Education. 2022, 10(2), 62-64. DOI: 10.12691/wjce-10-2-2
Pub. Date: March 23, 2022
1951 Views1 Downloads
by Lauren S. Lopansri, Jacob N. Letson, Richard A. O’Brien, David R. Battiste and David C. Forbes
Original Research
A method involving NMR band deconvolution has been applied to the instructional/research activities at the undergraduate level. Three case studies are presented to illustrate how unresolved peaks of 1H and 13C NMR spectra can used to obtain quantitative data on isomeric composition. The data generation is rapid and the method can be applied to any organic chemistry laboratory curriculum/research program involving the analysis of NMR spectra. The incorporation of NMR band deconvolutions offers an ideal platform to transition from qualitative to quantitative discernment of NMR data.
World Journal of Chemical Education. 2022, 10(2), 51-61. DOI: 10.12691/wjce-10-2-1
Pub. Date: March 11, 2022
2739 Views3 Downloads