Photoactivity of amorphous and crystalline TiO nanotube arrays (TNA) films in gas phase CO reduction to methane with simultaneous H production.

This study assessed the photoactivity of amorphous and crystalline TiO nanotube arrays (TNA) films in gas phase CO reduction. The TNA photocatalysts were fabricated by titanium anodization and submitted to an annealing treatment for crystallization and/or cathodic reduction to introduce Ti and oxygen vacancies into the TiO structure. The cathodic reduction demonstrated a significant effect on the generated photocurrent.

Evaluation of the hydrogenation reaction on the electrocatalytic nitrobenzene degradation over (FeCoNiCuZn)O high entropy oxides (HEOs).

Environmental pollution is one of the main challenges currently faced by mankind; especially industrial waste-waters treatment and remediation using energy-efficient methodologies. This research focused on the electrochemical degradation of the hazardous nitrobenzene (NB) in aqueous solutions, using novel high-entropy oxide (HEO) electrodes to elucidate the influence of the electrochemical reduction step on the degradation process. The effect of solution pH, dissolved oxygen concentration, anodic applied potential, and cell configurations on NB hydrogenation reaction were evaluated.

Single-step fabrication of highly stable amorphous TiO nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO to methane.

This study investigates the facile fabrication of interfacial defects assisted amorphous TiO nanotubes arrays (am-TNTA) for promoting gas-phase CO photoreduction to methane. The am-TNTA catalyst was fabricated via a one-step synthesis, without heat treatment, by anodization of Titanium in Ethylene glycol-based electrolyte in a shorter anodizing time. The samples presented a TiO nanostructured array with a nanotubular diameter of 100 ± 10 nm, a wall thickness of 26 ± 5 nm, and length of 3.

TiONTs bio-inspired coatings: revisiting electrochemical, morphological, structural, and mechanical properties.

By altering some synthesis variables, the morphology and structural properties of anodic TiOnanotube arrays (TiONTs) can be tailored to a specific application. This study aims to investigate the effect of electrolyte-containing ions from human plasma and annealing temperature on structural, morphological, and mechanical parameters of TiONTs films, targeting its potential biomedical applications. Bio-inspired TiONTs were grown from Tiand its Ti6Al4V alloy by potentiostatic anodization in the recently developed SBF-based electrolyte, maintained at 10 °C and 40 °C.

The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage.

This review addresses the main contributions of anodic oxide films synthesized and designed to overcome the current limitations of practical applications in energy conversion and storage devices. We present some strategies adopted to improve the efficiency, stability, and overall performance of these sustainable technologies operating via photo, photoelectrochemical, and electrochemical processes. The facile and scalable synthesis with strict control of the properties combined with the low-cost, high surface area, chemical stability, and unidirectional orientation of these nanostructures make the anodized oxides attractive for these applications.

Day/night melatonin content in cerebral palsy.

Changes in the sleep-wake cycle are frequent and may impair quality of life in individuals with cerebral palsy (CP). To investigate if a lack of a day/night variation of melatonin content could be related with sleep disorders (SD), the SD were evaluated with a Sleep Questionnaire and the melatonin content using ELISA in 33 individuals with CP and 24 controls. The indicative of SD were present in 47% of CP group, and the most frequent was the indicative of sleep breathing disorder.