RSS 1.0Artigos - Físico Química - IQ
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Photoelectrochemical hydrogen generation at hybrid rGO-Sn3O4/SnO2 nanocomposite
da Costa Romeiro, Fernanda
; Martins, Alysson Stefan ; Costa e Silva, Beatriz ; Zanoni, Maria Valnice Boldrin ; Orlandi, Marcelo Ornaghi (Journal of Applied Electrochemistry, 2022) [Artigo]
This study investigates the photoelectrocatalytic water splitting at Sn3O4 and ternary rGO-Sn3O4/SnO2 heterostructure nanocomposite materials. The nanocomposite exhibited superior performance compared to Sn3O4, a result ... -
On-site weld quality assessment and qualification for stainless steels tanks
; Fugivara, Cecilio Sadao; Benedetti, Assis Vicente (Ecletica Quimica, 2022) [Artigo]
Stainless steel tanks are frequently degraded by localized corrosion in bioprocess industries. A case study of 2101 duplex stainless steel tank allowed to apply a portable electrochemical microcell system (PassivityScan) ... -
MgAl-Layered Double Hydroxide Nanoparticles as Smart Nanofillers To Control the Rheological Properties and the Residual Porosity of Cement-Based Materials
Almeida, Adriana A.; Santos, Rodrigo M. M. ; Alves Rosa, Marinalva A. ; Pulcinelli, Sandra H. ; ; Santilli, Celso V. (ACS Applied Nano Materials, 2022) [Artigo]
Nanotechnology in building materials has still not been widely explored, despite its great potential in developing a new generation of smart and eco-efficient cementitious materials based on the addition of nanoparticles. ... -
Quantum rate dynamics and charge screening at the nanoscale level
Pinzón Nieto, Edgar Fabian; Alarcón, Erika Viviana Godoy ; Sánchez, Yuliana Pérez ; Bueno, Paulo Roberto (Physical Chemistry Chemical Physics, 2022) [Artigo]
It has been demonstrated that quantum-rate electrodynamics originate from charged quantum states within redox moieties coupled to electrodes. In this study, we demonstrate that this phenomenon is not restricted to redox ... -
Effect of the interlamellar anion on CuMgFe-LDH in solar photo-Fenton and Fenton-like degradation of the anticancer drug 5-fluorouracil
Costa-Serge, Nayara de M.; Lima Gonçalves, Rosembergue G. ; Ramirez-Ubillus, Manuel A. ; ; Hammer, Peter ; ; Pupo Nogueira, Raquel F. (Applied Catalysis B: Environmental, 2022) [Artigo]
The influence of the interlamellar anion in Layered Double Hydroxide was investigated for the first time in Fenton-like and solar photo-Fenton processes for the degradation of the anticancer drug 5-fluorouracil (5-FU). ... -
Glycerol-based polyurethane-silica organic-inorganic hybrid as an anticorrosive coating
Braz, Álvaro G.; Pulcinelli, Sandra H. ; Santilli, Celso V. (Progress in Organic Coatings, 2022) [Artigo]
This work investigates the use of glycerol as a crosslinker for segments of polyurethane (PU), which was hybridized with a silica network employing (3-aminopropyl) triethoxysilane (APTES) as a covalent coupling agent. This ... -
Electrochemical Corrosion Characterization of Submicron WC-12Co Coatings Produced by CGS and HVAF Compared with Sintered Bulks
; ; Peres, Riberto Nunes; ; ; ; ; ; ; et al. (Coatings, 2022) [Artigo]
The electrochemical corrosion performance of WC-12 wt% Co in coating and bulk forms has been evaluated in a 3.56 wt% NaCl solution. The coatings were deposited by means of thermal spray techniques, i.e., cold gas spraying ... -
Development of PMMA-CeO2 anticorrosive hybrid coatings with self-healing property
Rodrigues, Mariana S.; Souza, Thiago A.C. ; ; Trentin, Andressa ; Hammer, Peter (21st International Corrosion Congress, ICC INTERCORR WCO 2021, 2021) [Trabalho apresentado em evento]
Organic-inorganic hybrids are a new class of materials considered as a nontoxic alternative to replace noxious chromate-based anticorrosive coatings. In this context, hybrid nanocomposites based on poly(methyl methacrylate) ... -
Corrosion barrier properties of PMMA-silica coatings for protection of reinforcing steel
Uvida, Mayara C.; Trentin, Andressa ; ; Santilli, Celso V. ; Hammer, Peter (21st International Corrosion Congress, ICC INTERCORR WCO 2021, 2021) [Trabalho apresentado em evento]
Corrosion of steel metal structures is the principal cause of failure of reinforced concrete and the absence of preventive maintenance results in financial, social, and environmental implications. To overcome this problem, ... -
4-Dimethylamino-beta-nitrostyrene, a fluorescent solvatochromic probe to estimate the apparent dielectric constant in serum albumin: Experimental and molecular dynamics studies
Fernandes, Ana Julia Foganholi Carvalho; de Carvalho Bertozo, Luiza ; ; ; de Souza, Aguinaldo Robinson ; ; Ximenes, Valdecir Farias (Journal of Photochemistry and Photobiology A: Chemistry, 2022) [Artigo]
The spectroscopic properties of 4-dimethylamino-beta-nitrostyrene (DANS) were theoretically and experimentally correlated with the polarity of organic solvents and applied to estimate the overall apparent dielectric constant ... -
Surface-Supported Metal-Organic Framework as Low-Dielectric-Constant Thin Films for Novel Hybrid Electronics
da Silva, Ricardo M. L.; ; ; ; ; ; ; ; Bufon, Carlos C. B. (Advanced Electronic Materials, 2022) [Artigo]
The miniaturization of electronic devices highlights the need for robust low-κ materials as an alternative to prevent losses in the performance of integrated circuits. For it, surface-supported metal-organic frameworks ... -
Greenness of procedures using NADES in the preparation of vegetal samples: Comparison of five green metrics
Ferreira, Sabrina S.; Brito, Thomas A. ; ; ; Lamarca, Rafaela S. ; Ferreira, Karen C. ; Gomes, Paulo C. F. Lima ; ; ; Gonzalez, Mario H. (Talanta Open, 2022) [Artigo]
The principles of green analytical chemistry have led to the development of analytical procedures that are increasingly sustainable. Different metrics have been created for the evaluation of greenness, although determination ... -
A new multiphase calcium phosphate graft material improves bone healing—An in vitro and in vivo analysis
Guastaldi, Fernando Pozzi Semeghini; Matheus, Henrique Rinaldi ; ; de Almeida-Filho, Edson ; Cominotte, Mariana Aline ; Moretti, Livia Alves Correa ; Verzola, Mario Henrique Arruda ; Marcantonio, Elcio ; de Almeida, Juliano Milanezi ; Guastaldi, Antonio Carlos et al. (Journal of Biomedical Materials Research - Part B Applied Biomaterials, 2022) [Artigo]
This study aims to evaluate the potential of a novel biomaterial synthesized from amorphous calcium phosphate (ACP), octacalcium phosphate (OCP), and hydroxyapatite (HA) to repair critical-sized defects (CSD) in rabbit ... -
Assessment of WO3 electrode modified with intact chloroplasts as a novel biohybrid platform for photocurrent improvement
Silva, Caio César Gonçalves; Torquato, Lilian Danielle de Moura ; de Araújo, Bárbara Camila ; Mantilla, Hernan Dario Rojas ; Zanoni, Maria Valnice Boldrin ; Garrido, Saulo Santesso (Bioelectrochemistry, 2022) [Artigo]
The present work describes an easy way to prepare a Chloroplast/PDA@WO3 biohybrid platform based on the deposition of chloroplasts on WO3 substrate previously modified with polydopamine (PDA) film as anchoring agent. The ... -
Chemiluminescence from Ozonized Sesame Oil
Pavan, Nathalia Mariana; Passaretti Filho, Juliano ; Isquibola, Guilherme ; Caires, Flávio Junior ; Ximenes, Valdecir Farias (Ozone: Science and Engineering, 2022) [Artigo]
The applications of ozonized oils in human medicine, veterinary, and dentistry have been experiencing a significant increase in the last years. An important chemical property of ozonized oils is their oxidizing capacity, ... -
Structural Properties of Epoxy-Silica Barrier Coatings for Corrosion Protection of Reinforcing Steel
Uvida, Mayara Carla; Almeida, Adriana de Araujo ; Pulcinelli, Sandra Helena ; Santilli, Celso Valentim ; Hammer, Peter (Polymers, 2022) [Artigo]
Reinforcement steel extensively applied in civil construction is susceptible to corrosion due to the carbonation process in reinforced concrete and chloride ions diffusion. Epoxy-silica-based coatings are a promising option ... -
Reagentless Quantum-Rate-Based Electrochemical Signal of Graphene for Detecting SARS-CoV-2 Infection Using Nasal Swab Specimens
Garrote, Beatriz Lucas; Lopes, Lais C. ; Pinzon, Edgar F. ; Mendonca-Natividade, Flavia C. ; ; Santos, Adriano ; ; Bueno, Paulo R. (Acs Sensors, 2022) [Artigo]
The quantum-rate model predicts a rate k as a frequency for transporting electrons within molecular structures, which is governed by the ratio between the quantum of conductance G and capacitance Cq, such that k = G/Cq. ... -
Characterization and predictive modeling potential of aging time of roasted coffee using infrared spectroscopy
Lazaro, Maisa Cristina; ; Gomes Neto, Jose Anchieta ; Ferreira, Edilene Cristina (Analytical Methods, 2022) [Artigo]
Repackaging and tampering with labels of foods to extend their shelf life is an illegal practice, increasingly common in some Brazilian coffee retail markets. Fast, easy-to-use, and low-cost analytical techniques for the ... -
Impact of pharmacist intervention in patients with Alzheimer's disease
Forgerini, Marcela; ; Oliveira, Fernanda Mariana ; ; Capela, Marisa Veiga ; Mastroianni, Patricia de Carvalho (Brazilian Journal Of Pharmaceutical Sciences, 2022) [Artigo]
To assess the therapy relative to indication, effectiveness, safety and adherence in patients with Alzheimer's disease (AD). An interventional, prospective, non-randomized study was conducted in a single secondary care ... -
Controlling the breakdown electric field in SnO2 based varistors by the insertion of SnO2 nanobelts
Masteghin, Mateus G.; Varela, José A. ; Orlandi, Marcelo O. (Journal of the European Ceramic Society, 2017) [Artigo]
Semiconducting metal oxides have many practical applications, including varistors. Varistors based on SnO2 exhibit both high nonlinear coefficients and high breakdown electric fields. In this work we present a facile means ...