15 documents found, page 1 of 2
Tuning the Photocatalytic Activity of Tin Oxide through Mechanical Surface Acti...
Silva,Fernando B. F.; Silva,Gelson T. S. T. da; Torres,Juliana A.; Ribeiro,CaueTin oxide (SnO2) nanoparticles were synthesized by the co-precipitation method and mechanically modified by high-energy ball milling. The experimental results demonstrate that the collision with zirconia balls produces slight changes in the crystalline, electronic, morphological, and surface properties of SnO2, which lead to an increase in the redox potential of the energy level and the formation of the hydroxy...
Development of Bismuth Oxyhalides for Organic Pollutant Photodegradation and Wa...
Macedo,Gabriel K.; Dias,Eduardo Henrique; Ribeiro,Caue; Lopes,Osmando F.The development of visible-light active photocatalysts is vital to harvest the solar irradiation and build efficient photoelectrochemical devices. Bismuth oxyhalide (BiOCl, BiOBr and BiOI) materials stand out due to their remarkable properties, e.g., the band gap energy can be tuned from 1.9 to 3.4 eV depends on the halide employed. However, the hydrothermal synthesis of this material class was not properly inv...
Biological solubilization of phosphate rock by solid-state cultivation to produ...
Klaic,Rodrigo; Gava Junior,Marcelo; Florencio,Camila; Ribeiro,Caue; Farinas,Cristiane SanchezAbstract: The objective of this work was to evaluate the solubilization of phosphorus from a phosphate rock by Aspergillus niger, under solid-state cultivation (SSC) in sugarcane (Saccharum officinarum) bagasse, by maximizing the efficiency of citric acid production. The phosphate rock (IPR) chosen for the study is a type of igneous rock with a very low phosphorus solubility, obtained from the Itafós company, i...
REDUçãO DE CO2 EM HIDROCARBONETOS E OXIGENADOS: FUNDAMENTOS, ESTRATéGIAS E DESA...
Silva,Gelson T. S. T. da; Lopes,Osmando F.; Dias,Eduardo H.; Torres,Juliana A.; Nogueira,André E.; Faustino,Leandro A.; Prado,Fernando S.CO2 REDUCTION TO HYDROCARBONS AND OXYGENATES: FUNDAMENTALS, STRATEGIES AND CHALLENGES. The development of renewable energy sources (e.g., solar and wind) moves foward, the tendance for replacing fossil fuels increases. However, these technologies have as primary barriers to industrial processes’ efficiency and especially storage. Thus, CO2 reduction routes using these energy sources could chemically store part ...
Biodegradable oil-based polymeric coatings on urea fertilizer: N release kineti...
Bortoletto-Santos,Ricardo; Guimarães,Gelton Geraldo Fernandes; Roncato Junior,Vanderlei; Cruz,Diego Fernandes da; Polito,Wagner Luiz; Ribeiro,CaueABSTRACT: Polymer coatings are used to control the rate of release of plant available nutrients from fertilizers as well as to reduce nutrient losses such as ammonia (NH3) volatilization. Although the literature presents several examples of materials used to coat urea, little is known about nitrogen (N) release properties such as the mechanism involved and phenomena (e.g., pore opening) in the polymer coating. ...
Analysis of NH3-N Slow Release systems for fiber digestibility of low-quality f...
Cruz,Camila Conceição Tomé da; Pereira,Elaine Inácio; Sato,Patrícia Suemi; Guimarães,Gelton Geraldo Fernandes; Souza,Gilberto Batista deABSTRACT: Urea is a common non-protein supplement used in ruminant feed; however, excessive consumption may lead to poisoning by NH3. Although the slow release of urea into the rumen has shown to be an essential aspect for ruminant feed, to date only a few studies have addressed this matter. In this study we examined the influence of five different NH3-N slow release systems based on clay-urea nanocomposites on...
Semicondutores heteroestruturados: uma abordagem sobre os principais desafios p...
Bueno,Romero T.; Lopes,Osmando F.; Carvalho,Kele T. G.; Ribeiro,Caue; Mourão,Henrique A. J. L.Heterostructured semiconductors are materials with unique features formed by combination of two or more semiconductors with suitable interface between them. The study of the heterostructures aim the development of physico-chemical and photocatalytic properties higher than their isolated phases, which makes it possible to obtain higher efficiency and lower cost in several technological processes. Recently the he...
[Mg-Al]-LDH and [Zn-Al]-LDH as Matrices for Removal of High Loadings of Phosphate
Bernardo,Marcela Piassi; Ribeiro,CaueEutrophication is an undesirable environmental process that occurs in water bodies affected by high concentrations of phosphate. Different economic sectors are responsible for discharge effluents with extremely high phosphate content. Therefore, is important to develop technologies capable of remove phosphate from these effluents, before that reach other and larger water bodies. This work proposes the use of la...
Characterization of Single Superphosphate Powders – a study of Milling Effects ...
Plotegher,Fábio; Ribeiro,CaueConventional single superphosphate (SSP) is known as one of the most important and common sources of phosphorus in agriculture. Despite SSP has been widely produced as a fertilizer, a few studies have been done to describe the fundamental aspects of this P-fertilizer, i.e., phase composition, thermal degradation behavior, and solubility kinetics. Therefore, this paper reports on the detailed characterization of...
ÓXIDOS DE NIÓBIO: UMA VISÃO SOBRE A SÍNTESE DO Nb2O5 E SUA APLICAÇÃO EM FOTOCAT...
Lopes,Osmando F.; Mendonça,Vagner R. de; Silva,Fernando B. F.; Paris,Elaine C.; Ribeiro,CaueDespite the fact that Brazil is the world’s largest niobium mineral producer, governmental interest in exploration of the mineral leading to more valuable derived materials is scarce, which has reduced the country’s knowledge about a wider range of technological applications for this metal. Niobium pentoxide stands out due its remarkable electronic, structural, and textural properties. Therefore, this review ai...