BACKGROUND The production of nanoparticles using a biosystem is considered green chemistry. Application of plant extracts as a biological process has been proven to be suitable for synthesis of nanoparticles. OBJECTIVES This study designed in order to evaluate the production of silver nanoparticles using Juglans regia leaf extract and to compare the outcome of different preparation methods of...

in this research, a single-stage low-temperature hydrothermal synthesis route was successfully developed for preparation of iron disulfide. the prepared powder was characterized by x-ray diffraction (xrd) and scanning electron microscopy (sem). these analyses showed that nanoparticles were well crystallized, pyrite was the main product and the shape of crystals was nanorod. also, the influences...

the preparation of nano-sized tio2 by titanium tetraisopropoxide (ti(oipr)4) via sol-gelmethod using acid as a catalyst is investigated and the optimized conditions concerning theproportional amount of acid, water, alcohol is established by xrd and sem. the effect ofcalcination temperature on phase transformation of tio2 (rutile, anatase and brookite) wasdetermined by xrd. the smallest grain si...

This work aims to study the possibility of using an electrostatic drum-type separator prepare a powder with narrow size distribution curve for usage in additive manufacturing. The distributions uncoated commercial aluminum powders ASP-30, ASP-22, and ASP-5 were analyzed. It was shown that ASP-30 ASP-22 have similar asymmetric SPAN 1.480 1.756, respectively. powder, turn, has 0.869. chosen furth...

With the rapid development of construction industry brought by accelerated process urbanization, problem random stacking and landfill waste concrete can be seen everywhere, which seriously affects environmental health. The secondary utilization as recycled aggregate has become a research hotspot. This paper mainly studies influence cementing material system fine powder foam on water absorption ...