In the presented paper, activated carbons were prepared from fructose and glucose, activating agents (KOH, NaOH, LiOH) by hydrothermal treatment (HTC) treatment. After preparation, samples characterized in details. Different techniques used: x-ray powder diffraction analysis, Raman spectral elemental determination of textural morphological properties. Obtained results showed dependence investigated properties nature precursors (glucose or fructose) as well type hydroxides used agents....

The present study reports the new facile methodology for synthesis of symmetrical and asymmetrical thioureas by an one-pot reaction amine, carbon disulfide oxidants: hydrogen peroxide, ethylenediamine tetraacetic acid (EDTA)/sodium percarbonate system or air. structures synthesized compounds were confirmed IR, 1H 13C NMR MS methods. Reaction mechanism has been proposed on basis intermediate isolation their structure determination. synthetic benefits presented methods is reflected in...

A carbon-rich solid product has been synthesized by hydrothermal treatment from fructose with HNO3 at temperature of 140°C. The concentration the precursor was changed in order to investigate how its change influences formation carbon microspheres. pH value for every sample same, i.e. 1. rich through carbonization is consequence dehydration reactions. Obtained material made spherical micrometer-sized particles diameter 1-6 µm range, which can be modulated modifying solution. best results are...

Brassinosteroids (BRs) are a class of plant hormones that play important roles in regulating various physiological and developmental processes plants. One the most effective BRs involved modulating crop growth is 24-epibrassinolide (24-EBL). The effects different concentrations 24-EBL on biochemical biophysical parameters critical to early stages seedling development were investigated using two maize hybrids, ‘ZP 434’ (a new-generation hybrid) 704’ (an older-generation hybrid). evaluation...

Carotenoids are known for their lower environmental pollution, costs, shorter extraction time compared to regular methods and higher efficiency. Ultrasound has significant advantages in the of a great number biologically active compounds including carotenoids. Benefits using ultrasound various numerous include effective mixing micro-mixing, more efficient energy transfer, reduced thermal concentration gradients, temperature. The aim this work was investigate influence two-frequency main...

Carbon microspheres have been synthesized by the hydrothermal method with fructose and a phosphoric acid solution at two different concentrations, which were used as precursors. The obtained materials characterized elemental analysis, X-ray powder diffraction (XRPD) scanning electron microscopy (SEM), nitrogen adsorption/desorption measurements, Fourier transform infrared (FTIR) spectroscopy. Batch sorption experiments performed to remove methylene blue (MB) from aqueous solutions varying...

In presented paper, influence of temperature, precursor concentration and different hydroxides on properties activated carbon obtained from saccharose were investigated. The samples prepared by hydrothermal treatment using KOH, NaOH LiOH. Two concentrations (0.5, 1.0 mol/dm3) three temperatures (160, 200, 240 ?C) changed in treatment. Activation processes performed at 750?C under N2 atmosphere. Samples characterized X-ray powder diffractometry, elemental analysis, adsorption-desorption...

Plod platana je korišćen za dobijanje praškastog aktivnog uglja. Kao aktivirajuće sredstvo upripremi upotrebljena koncentrovana fosforna kiselina. Izvršena ravnotežna adsorpcijakatjonske boje metilen plavo na sintetizovanom materijalu. Dobijeni rezultati su fitovani sa triravnotežna adsorpciona modela. Eksperimentalni analizirani od strane Langmuirizoterme, Freundlich izoterme i Temkin izoterme. Najbolje slaganje eksperimentalnih rezultata sateorijskim modelima dobijeno u slučaju...

The influence of different hydroxides, applied to activate carbon black, on the electrochemical properties activated was investigated. material prepared by hydrothermal treatment sucrose and afterwards thermally using KOH, NaOH LiOH. obtained samples were examined cyclic voltammetry impedance spectroscopy correlated their physicochemical properties. All showed characteristic capacitor-like behaviour. highest specific capacitance for KOH-treated sample, while increase in follows sequence...

There is an increased research interest in methods for transparent wood production and its use. Wood transparency could be achieved by delignification followed impregnation process with polymers having proper optical properties. However, processes are mainly time consuming not environmentally friendly. The possibility of treating mahogany (Swietenia macrophylla King) 20% hydrogen peroxide 70, 100, 135, 170 min at 103 °C presented this research. According to the treatment duration, lignin...

Nanostructures of noble metals (Pt and Ag) on carbon support were prepared from fructose solution the Nobel metal salts (H2PtCl6 x 6H2O or AgNO3) under hydrothermal conditions. Commercial (C6H12O6) acts as source reducing agent is a to be incorporated in new formed material structure. The crystalline structure was examined by X-ray diffraction (XRD) morphology investigated scanning electron microscopy (SEM). crystallite size deposited particles could estimated evaluating line width Bragg...

Thermo-chemical conversion of cigarette butt filters (CBF) waste was investigated using various thermal analysis techniques (simultaneous TG-DTG-DTA and DSC methods) at different heating rates in an inert atmosphere. Thermo- thermo-physical properties material were discussed, from the point view chemical structure influence experimental parameters on process. It established that acetyl groups plasticizer (triacetin) interact with cellulose acetate through dipolar interactions hydrogen...

In this work, the coefficient of fluid-wall mass transfer in an inverse fluidized bed was determined using adsorption method. The experiments were carried out a column with diameter 45 mm spherical and non-spherical particles polypropylene polyethylene 3.3?4.9 density about 930 kg m-3. A diluted solution methylene blue used as fluidization medium, which adsorbed on part surface silica gel. obtained results showed that presence during does not contribute significantly to compared influence...

Activated carbons (ACs) were successfully prepared using plane tree seed (PTS) as a cheap and renewable raw material. The seeds firstly treated combining magnetic (MM) ultrasonic mixing (USM) during 0.5, 1 3 h in M, M 6 of H3PO4 solutions, then activated at 260 °C 20 (low temperature hydrothermal carbonization–low HTC) above mentioned solutions the same molarity. influence combined activation processes on physical, structural morphological properties, their optimization was studied by X-ray...

Activated carbons due to their antimicrobial effect have been used in medicine for a long period of time. The active carbon material is obtained at temperature 260°C, by hydrothermal carbonization fructose the presence phosphoric acid. resulting carbonaceous materials were characterized by: nitrogen adsorption/desorption isotherms measurements, scanning electron microscope and Fourier transform infrared spectroscopy. was examined as an agent using LB agar assay on skin microbes. has specific...

Carbon materials with developed porosity are usually used as supports for platinum catalysts. Physico-chemical characteristics of the support influence properties deposited and its catalytic activity. In our studies, we on carbon fibrous like obtained from platanus seeds - achenes. The precursor was chemically activated different reagents: NaOH, pyrogallol, H2O2, before carbonization process. Platinum all substrates to study substrate activity catalyst. were characterized by nitrogen...