Rajeev B. Dabke’s research while affiliated with Columbus State University and other places

... Specifically, BiOI NSs exhibit large specific area which is beneficial for Ag + adsorption and accumulation on the surface (Fig. S4) [41,42]. The solubility product difference between BiOI (3.3 ×10 − 11 ) and AgI (8.52 ×10 − 17 ) drives the ion exchange reaction between the [BiO] + species in BiOI and surface adsorbed Ag + [43,44], thus generating the new phase of AgI. ...

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Highly selective and sensitive photoelectrochemical detection of silver ions in complex industrial wastewater

... Including this new methods plus learning patterns of students had driven research to find ways of for students to own their knowledge on any science field (Allan et al., 2013;Watson, 2001). Specifically, on chemistry, which many times shows itself as abstract, difficult, monotonous, detach, and far from professional or real life experiences (Gutierrez Mosquera and Barajas Perea, 2019), that is why it becomes necessary to bring modern like gaming (Buendía-Atencio et al., 2022;Jääskä and Aaltonen, 2022;NOURI and Rahimi Meroei, 2021;Porto et al., 2020;Sousa Lima et al., 2019), class Ludic (Maila-Álvarez et al., 2020;Zaragoza Ramos et al., 2016); flipped classroom (Nappa et al., 2021;Peralta-Benítez et al., 2021), video-based learning (Hernández et al., 2014;Londero Balza, 2014); digital content usage (Figueiredo et al., 2016;Liu et al., 2022;Thibaut and Schroeder, 2022), and interactive platforms (Athavan Alias Anand, 2021;Christiansen, 2021;Dabke et al., 2022), that allowed revitalize the learning of concepts as well as to heal the wrong and "a priori" concept of chemistry as a difficult science. ...

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Active learning strategies on organic nomenclature using digital tools and collaborative work

... The opportunities for groups with disabilities to engage with chemistry and in particular practical chemistry are all too rare. Where this has taken place, it has involved, for example, webbased reading, 24,25 the use of QR codes to facilitate knowledge transfer via the spoken word, 26 computational chemistry via talking computers, 27,28 a summer school for preuniversity students, 29 and an undergraduate course where scribes and other guides were used to support a legally blind undergraduate. 30 Health and safety considerations 31,32 are often barriers to prevent such interactions. ...

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Flipping the Thinking on Equality, Diversity, and Inclusion. Why EDI Is Essential for the Development and Progression of the Chemical Sciences: A Case Study Approach

... Accordingly, chemists had put significant effort in developing molecular modelling tools, both virtual and physical models in their context to improve students' visualization of three-dimensional (3D) objects such as: VESTA (visualization for electronic and structural analysis) developed for 3D visualization of crystals structures and volumetric data using computers (Momma & Izumi, 2008); 3D structures animated software (Hsin-Kai & Priti, 2004); unit cell visualization tool (Gruber et al., 2020;Rodenbough, Vanti & Chan, 2015); and ball and stick models (Dickenson et al., 2020;Elsworth, Li, & Ten, 2017;Rossi, Benaglia, Brenna, Porta, & Orlandi, 2015;Sow, Udalagama, & Lim, 2013), and they reported context based developed intervention mechanisms were improved students' mental visualization of three-dimensional order of crystals structures, and improved students' metacognitive skills. Besides, Melaku and Dabke (2021) locally constructed (context-based) chemistry teaching matererials by interlocking toy building blocks (e.g., Lego) and used to depict chemistry concepts of Lewis structures, chemical bonding, conjugate acid-base pairs, types of chemical reactions, irregularity in ionization energy trends, and the decay of a radioactive isotope, and they reported that the approach was effective in enhancing students' visualization ability on these concepts. ...

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The effect of context-based close packing supported with the 3D-virtual model of crystals structure on students’ achievement and attitude

... Electrochemical titration, a direct method for generating standard solutions, relies on Faraday's law to establish a direct relationship between the charge passing through an electrode and the moles of the analyzed substance reacting [20,58]. This technique, in comparison to conventional titrations, presents advantages such as precise generation of standard solutions without the need for standardized solutions and minimal dilution of the analyzed sample. ...

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EDTA Derivatives and Analogous Compounds in Pharmaceutical Analysis

... 9 Laboratory experiments of an academic interest present coulometric analysis of common household products. 10,11 Several innovative methods demonstrate coulometric devices for inexpensive, rapid, and sensitive analysis. These methods include double-pulse compensation, 14 titration in a liquid drop, 15 application of a paper-based device, 16 and electrode modification with ion-selective membranes. ...

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Feasibility of Performing Concurrent Coulometric Titrations Using a Multicompartment Electrolysis Cell

... Essa dimensão invisível do conhecimento químico tem potencial para contribuir com a integração dos estudantes com DV em uma classe regular. A proposta é construir modelos de moléculas de aromas conhecidos, como as que estão presentes no pão assado, relacionando com a linguagem simbólica das fórmulas e nomes, conforme ilustrado na Figura 2. Com o tato é possível explorar os conceitos de tabela periódica que estão na Figura 3 usando as representações das magnitudes das propriedades periódicas, que podem ser colocadas em alto relevo com a cola 3 D. O uso de blocos de construção (por exemplo, LEGO) é uma alternativa para o ensino e aprendizagem desses conceitos da Química no ensino médio (MELAKU et al, 2016). Esta atividade é sugerida para ambientes não formais, pois apresenta uma característica lúdica e de metodologia ativa. ...

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QUÍMICA PARA TODOS: EXPERIMENTOS MULTISSENSORIAIS PARA A EDUCAÇÃO INCLUSIVA

... Um exemplo encontrado na literatura e que utilizamos neste roteiro é a determinação do número de transporte do íon hidrônio, H 3 O + , em uma solução aquosa de HCl, utilizando eletrodos de cobre e alaranjado de metila como indicador. 58 Os íons Cu 2+ também migram para o eletrodo de cima, mas como sua mobilidade iônica é menor do que a do íon Vale ressaltar que, como o líquido contido entre os dois eletrodos vai sofrendo alteração, portanto, a resistência desta coluna de eletrólito é alterada e, como o íon hidrônio tem uma mobilidade maior que a do Cu 2+ , a condutância diminui ou a resistência aumenta à medida que o experimento avança. É importante que o experimento seja realizado à corrente constante, então é necessário que a fonte de corrente permita esse ajuste automaticamente, mediante aumento da tensão, já que a resistência aumenta. ...

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Pedagogical Retrofit Applied to the Experiment "Moving Boundary Method"

... Taking into account the different strengths of the titrants-oxidants, there is the possibility of controlling the selectivity of the target analyte response. Thus, electrogenerated iodine does not oxidize phenolic AOs [55] and retinol [63], while it reacts with thiol-containing AOs [47][48][49][50][51] and ascorbic acid [55,59,60]. On the contrary, hexacyanoferrate(III) ions easily interact with phenolic AOs and ascorbic acid [55] but do not react with S-containing AOs. ...

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Analytical Capabilities of Coulometric Sensor Systems in the Antioxidants Analysis

... An electrochemical system in which the charge transfer interface is always at equilibrium is called an electrochemically reversible or Nernstian system. 29 A system may show reversible, quasireversible, or irreversible behavior depending on the value of Λ, or experimentally, the scan rate employed (more details 29 In general, the larger the Λ, the more electrochemically reversible is the system: (4) From an experimental data point of view, electrochemical reversibility is reflected in the peak separation (ΔE) of the anodic peak maximum potential (E pa ) and the cathodic peak maximum potential (E pc ) in the cyclic voltammogram. The difference between the anodic and the cathodic peak potentials should be 57 mV for a one-electron redox couple that is chemically and electrochemically reversible at 25°C. ...

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Teaching Heterogeneous Electrocatalytic Water Oxidation with Nickel- and Cobalt-Based Catalysts Using Cyclic Voltammetry and Python Simulation