Low-temperature aqueous chemical growth methods have shown great potential in the synthesis of ZnO nanostructures. Hexamethylenetetramine (HMTA) is the most common chemical substance used in the hydrothermal synthesis. In this study zinc oxide nanoparticles were prepared via hydrothermal growth using zinc acetate dihydrate and sodium hydroxide, as precursors instead of HMTA, as it is commercial...

One of the most promising developments of supercritical fluid technologies concerns today the field of inorganic, hybrid and organic materials processing. Two well known ways are generally associated to materials processing in supercritical fluids: the first way with processes based on a physical transformation (RESS, SAS, PGSS ... processes) and the second one with processes based on a chemica...

Despite a wide range of applications, naturally occurring minerals suffer from some limitations for industrial use. Consequently, many research efforts have been conducted to develop fast, optimized, and sustainable methodology produce synthetic minerals. In the case calcium silicate hydrates (CSH), hydrothermal flow approach allows mimic environment at high temperature pressure natural geologi...

The present work describes a novel process for the elaboration of ceramic material. Y-doped barium zirconate, an electrolyte material Protonic Ceramic Fuel cell, was synthesized by continuous hydrothermal in supercritical conditions (410 °C/30.0 MPa) using nitrate precursors and NaOH reactants. use water allowed formation particles about 50 nm diameter with narrow size distribution. X-Ray Diffr...

A novel process for crystalline silicotitanate (CST) synthesis was developed using waste cathode ray tube (CRT) panel glass as silicon source. The key trait of the process was to extract most of the silicon out of the glass for CST preparation, but leave Ba and Sr in the residue which had the potential to be employed as raw material for metallic Ba and Sr metallurgy. In the synthesis process, w...

The synthesis of biodiesel fuel from lipids (vegetable oils and animal fats) has gained in importance as a possible source of renewable non-fossil energy in an attempt to reduce our dependence on petroleum-based fuels. The catalytic processes commonly used for the production of biodiesel fuel present a series of limitations and drawbacks, among them the high energy consumption required for comp...

Glucose, a readily available biomass precursor is used for the production of carbon quantum dots (CQDs) via fast, efficient, and environmentally benign continuous hydrothermal flow synthesis (CHFS) process using supercritical water, an approach that can be scaled up industrialization, producing materials with enhanced properties. The water-soluble CQDs exhibit average particle size 2.3 ± 0.5 nm...

Nano-sized BaTiO3 powders with particular Nb concentrations were prepared by Rotary- Hydrothermal (RH) method. Hydrothermal method was used at 180 °C for 5 hours with new Ti pressure and the teflon vessel was rotated at a speed of 160 rpm during the hydrothermal reaction. New hydrothermal method was used instead of previous solid state reaction for the system BaTiO3±Nb<sub...