Producción intelectual de Angel Manuel Melendez Reyes

2020

C. Rodríguez, A. M. Meléndez (2020). Espumas de vidrio y recubrimientos poliméricos a base de PVB obtenidos a partir de desechos de vidrio laminado y cenizas volantes. Rev. Colomb. Mater.

Una combinación de tratamientos mecánicos y químicos realizados a desechos de vidrio laminado permitió la separación completa de sus componentes, el vidrio templado y el butiral de polivinilo (PVB), lo cual hizo viable su recuperación y reciclaje para generar productos con valo...


Autor(es): Angel Manuel Melendez.  



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2020

2019

2019

J.A. Tamayo, A.M. Meléndez, J.A. Calderón. An integrated approach to evaluating the effect of associated minerals on copper ammoniacal thiosulfate leaching of a gold–bearing sulfide concentrate. Hydrometallurgy 184 (2019) 9?21.

This work proposes a method for the evaluation of the effect of galvanic interactions between intergrown sulfide mineral grains present in a thiosulfate leaching system, based on a combination of electrochemical measurements.


Autor(es): Angel Manuel Melendez.  



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2019

A.F. Gualdrón–Reyes, S. J. Yoon, E.M. Barea, S. Agouram, V. Munñoz–Sanjosé, A.M. Meléndez, M.E. Niño–Gómez, I. Mora–Seró. Controlling the phase segregation in mixed halide perovskites through nanocrystal size. ACS Energy Lett. 4 (1) (2019) 54–62.

To accurately determine the conditions in which deleterious photoinduced phase segregation appears in mixed halide perovskite films, we have tracked the NP-to-bulk transition induced by annealing.


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2018

A. F. Gualdrón–Reyes, A. M. Meléndez, I. González, L. Lartundo–Rojas, M. E. Niño–Gómez. Effect of metal substrate on photo(electro)catalytic activity of B–doped graphene modified TiO2 thin films: Role of iron oxide nanoparticles at grain boundaries of TiO2. J. Phys. Chem. C 122 (1) (2018) 297–306.

Grain-boundary nanosegregation of alpha–FeOOH and alpha-Fe2O3 in TiO2 films cause deleterious effect on photocatalytic and photoelectrocatalytic activity. Electron scattering at grain boundaries contributes to increasing the resistivit...


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2018

I.N. Sequeda–Pico, L.M. Joya–Herrera, A.M. Meléndez, R. Ospina–Ospina, J.A. Henao–Martínez, M.E. Niño–Gómez. Enhanced photoelectrochemical performance of iron and carbon self–doped TiO2 photoanodes modified with nitrogen. Thin Solid Films 653 (2018) 326–332.

The photoelectrochemical performance and the semiconducting properties of iron, carbon, and nitrogen modified TiO2 films prepared by a sol–gel method and deposited on 304 stainless steel plates by a dip–coating technique were studied.


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2018

A.F. Gualdrón–Reyes, A.M. Meléndez, M.A. Mejía–Escobar, F. Jaramillo, M.E. Niño–Gómez. The role of boron in the carrier transport improvement of CdSe–sensitized B,N,F–TiO2 nanotube solar cells: a synergistic strategy. New J. Chem. 42 (2018) 14481–14492.

We investigate the energy transfer mechanism and the charge carrier transport capacity of a set of photoanodes developed for a CdSe quantum dot-sensitized solar cell.


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2018

F.A. González–Camacho, E.S Duran–Uribe, E.V. Godoy–Alarcón, D.A. Miranda, A.M. Meléndez. Composition control by bath temperature and use of supporting electrolyte in electrodeposited mercury cadmium selenide thin films. J. Phys. Conf. Ser. 1119 (2018) 1–5 (012001).

Hg1-xCdxSe films were prepared in an aqueous solution by using potentiostatic deposition. We have focused on the improvement of the composition of the film to obtain single-phase of chalcogenide.


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2018

Y. Cogollo, E.M. Saavedra, M.A. Flórez–Suárez, C.C. Viáfara, A.M Meléndez. Application of the voltammetry of microparticles for characterizing wear debris produced in the sliding wear regimes of steels. J. Phys. Conf. Ser. 1119 (2018) 1–6 (012018).

We report the application of voltammetry of microparticles methodology to investigate the reactivity of sliding wear debris from low alloy (AISI 4140) and tool (AISI H13) steels.


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2018

S. Marquez, M.A. Flórez?Suárez, C.C. Viáfara, A.M. Meléndez. Evaluation of a worn out WC–Co–TiAlN cutting tool used in industry. J. Phys. Conf. Ser. 1119 (2018) 1–5 (012021).

An evaluation of the premature wear of a cutting tool using physical characterization together with an electrochemical analysis was carried out.


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2017

A.F. Gualdrón–Reyes, V. Domínguez–Vélez, J.A. Morales–Morales, R. Cabanzo, A.M. Meléndez. Effect of substrate nature on the electrochemical deposition of calcium-deficient hydroxyapatites. J. Phys. Conf. Ser. 786 (2017) 1–5 (012030).

Calcium phosphates were obtained by reducing nitrate ions to produce hydroxide ions on TiO2/stainless steel and TiO2/titanium electrodes. A catalytic current associated with nitrate reduction reaction was obtained for stainless steel electrode, lea...


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2017

M. Hasani, A. Khodadadi, S.M.J. Koleini, A.H. Saeedi, A.M. Meléndez. Simultaneous leaching of Pt, Pd, and Rh from automotive catalytic converters in chloride-containing solutions. J. Phys. Conf. Ser. 786 (2017) 1–9 (012042).

To obtain optimum simultaneous extraction of Pt, Pd, and Rh from catalytic converters of spent exhaust systems, a series of leaching tests were carried out to investigate the key variables in evaluating leaching behavior by response surface methodology.


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2017

M. Hasani, A. Khodadadi, S.M.J. Koleini, A.H. Saeedi, Y. Pérez-Pacheco, A.M. Meléndez. Platinum leaching from automotive catalytic converters with aqua regia. J. Phys. Conf. Ser. 786 (2017) 1–5 (012043).

Kinetics for extraction of platinum from spent autocatalysts, using nitric acid as an oxidant in hydrochloric acid solution, was investigated. The kinetic data were analyzed using the shrinking core model.


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2017

A.F. Gualdrón–Reyes, A. Cárdenas–Arenas, C.A. Martínez, V.V. Kouznetsov, A.M. Meléndez. Fabrication of transparent TiO2 nanotube–based photoanodes for CdS/CdTe quantum dots co–sensitized solar cells. J. Phys. Conf. Ser. 786 (2017) 1–6 (012044).

To fabricate solar cells, ordered TiO2 nanotube (TNT) arrays were prepared by double anodization. TNT arrays with variable lengths were obtained by changing the duration of the anodizing process.


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2017

N.J. Parada–Gamboa, J.A. Pedraza–Avella, A.M. Meléndez. Effect of substrate surface treatment on electrochemically assisted photocatalytic activity of N–S co–doped TiO2 films. J. Phys. Conf. Ser. 786 (2017) 1–6 (012045).

Different metal surface treatments were performed on meshes of stainless steel 304 and titanium to investigate the effect of photocatalytic activity in supported TiO2 films.


Autor(es): Angel Manuel Melendez.  



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2016

C.V. Chaparro, L.V. Herrera, A.M. Meléndez, D.A. Miranda. Considerations on electrical impedance measurements of electrolyte solutions in a four–electrode cell. J. Phys. Conf. Ser. 687 (2016) 1–4 (012101).

A tetrapolar probe to measure the electrical properties of electrolyte solutions was implemented with gold electrodes and a potentiostat according to the van der Pauw method.


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2015

M. Sánchez, F.A. González–Camacho, D.A. Miranda, A.M. Meléndez. Electrosynthesis and characterization of Hg1–xCdxSe films. J. Phys. Conf. Ser. 582 (2015) 1–5 (012046).

An electrodeposition process from an aqueous bath of CdSO4, SeO2, and Hg2Cl2 at pH 2.3 was performed to synthesize two Hg1-xCdxSe alloys with x = 0.8 onto TiO2 surface.


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2015

2014

R. Arroyo, D. Ramírez–Ortega, A.M. Meléndez, P. Acevedo–Peña, Ignacio González. Semiconducting properties of ZnO/TiO2 composites by electrochemical measurements and its relationship with photocatalytic activity. Electrochim. Acta 140 (2014) 541–549.

-Core/shell nanoparticles with high photocatalytic activity were obtained by sol–gel. -Electrochemical techniques were used to uncover the ZnO and TiO2 interaction.


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2014

J.L. Ropero–Vega, A.M. Meléndez, J.A. Pedraza–Avella, R.J. Candal, M.E. Niño–Gómez. Mixed oxide semiconductors based on bismuth for photoelectrochemical applications. J. Solid State Electrochem. 18 (2014) 1963–1971.

The structural and photoelectrochemical properties of Bi–Nb–M–O (M = Al, Fe, Ga, In) mixed oxide semiconductor films were studied in order to explore their use as photoanodes.


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2011

A.K. Darban, M. Aazami, A.M. Meléndez, M. Abdollahy, I. González. Electrochemical study of orpiment (As2S3) dissolution in a NaOH solution. Hydrometallurgy 105 (2011) 296–303.

The chemical dissolution reaction mechanism without electron transfer of natural orpiment grains in a 1 M NaOH solution is investigated using a combination of spectroscopic, chromatographic, and electrochemical techniques.


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2011

A.M. Meléndez, I. González, R. Arroyo. Electrochemical aspects of silver sulfosalts dissolution in acid thiourea solution. ECS Transactions 36 (1) (2011) 491–500.

The pyrargyrite and proustite oxidation with electrogenerated formamidine disulfide is studied by voltammetry of microparticles. The chemical bond between sulfur and pnictogen (As or Sb) has an important role in the dissolution process.


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2010

A.M. Meléndez, A. Hernández-Gómez, C. Lara, I. González. Electrochemical determination of minor elements in zinc flotation concentrates. ECS Transactions, 28 (2010) 259–265.

An electrochemical method is proposed to determine sulfide minerals and anglesite in zinc flotation concentrates. Sphalerite is electrochemically silent in the potential range studied.


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2010

A.M. Meléndez, I. González, R. Arroyo. An approach to the reactivity of isomorphous proustite (Ag3AsS3) and pyrargyrite (Ag3SbS3) in cyanide solutions. ECS Transactions, 28 (2010) 191–199.

The electrochemical reactivity of the sulfosalts pyrargyrite and proustite in a cyanide medium was studied with two types of electrodes.


Autor(es): Angel Manuel Melendez.  



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2010

A.M. Meléndez, R. Arroyo, I. González. On the reactivity of sulfosalts in cyanide aqueous media: structural, bonding and electronic aspects. ChemPhysChem 11 (2010) 2879–2886.

Solid action: A study of physical properties in correlation with the chemistry and structure of the Ag3AsS3–Ag3SbS3 series is obtained by a combination of spectroscopic and electrochemical measurements to investigate thei...


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2008

C. Gerónimo, A.M. Meléndez, C. Lara, I. González. Electrochemical methodology based on carbon paste electroactive electrodes for determination of cyanide-leachable silver–bearing minerals in flotation heads. ECS Transactions, 15 (2008) 545–553.

The proposed methodology is based on the preliminary oxidation of silver-bearing minerals samples. The reduction behavior of previously oxidized minerals is associated with cyanide leachable silver.


Autor(es): Angel Manuel Melendez.  



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2008

A.M. Meléndez, E. Lima, I. González. Influence of cation Na/Ca/Ag ratio on ion exchange rate in zeolite A–modified carbon paste electrodes. J. Phys. Chem. C 112 (2008) 17206–17213.

The diffusion phenomena in Linde Type A zeolites were measured by combining electrical (open–circuit potential) measurements and cyclic voltammetry in carbon paste electrodes. The influence of nature and cation content on the ion exchange rate was investigated.


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2007

G. Urbano, A.M. Meléndez, V.E. Reyes, M.A. Veloz, I. González. Galvanic interactions between galena–sphalerite and their reactivity. Int. J. Min. Proc. 82 (2007) 148–152.

The galvanic effect between the main associated mineral phases in a zinc concentrate was evaluated using an electrochemical methodology based on composite electrodes. Comparative studies were performed between high-purity galena and sphalerite specimens. ...


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2007

J. Vazquez-Arenas, G. Vázquez, A.M. Meléndez, I. González. The effect of the Cu2+/Cu+ step on copper electrocrystallization in acid noncomplexing electrolytes. J. Electrochem. Soc. 154 (2007) D473–D481.

The effect of ClO4, NO3, and SO42– on the kinetics, growth type, and morphology of copper electrodeposition is investigated. The anion type has a direct effect on the electron transfer reaction and the electroc...


Autor(es): Angel Manuel Melendez.  



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