Chemical Route Manufactured ZnO Nanoparticles And Their Biological Accumulation

ZnO nanocrystalline powder was successfully synthesized via co-precipitation method coupled with high annealing treatment. X-ray diffraction analysis revealed that the NPs have a pure hexagonal wurtzite structure with a mean crystallite size of approximately 59 nm. FESEM observations along with EDS analysis indicated the formation of fine particles in the nanoscale regime, with hexagonal shape and high purity. Both Raman and photoluminescence characterizations confirmed the high crystalline and the optical quality of the synthesized ZnO NPs. The assessment of the impact of ZnO-based nanoparticles and their effects on body and bioaccumulative bioindicators of pollution, Helix aspersa snails was performed in order to preserve the safe development of nanotechnology.

Characterization of cellulose nanocrystalline isolated from banana peduncles using acid hydrolysis

The study aimed to characterize cellulose nanocrystalline (NCCs) from banana peduncles using acid hydrolysis. The NCCs isolation process was done by hydrolysis using H2SO4 with concentrations of 1M, 2M, and 3M at a microwave power of 100 Watts within 1 hour of hydrolysis. The product of NCCs was characterized in term of yield, chemical composition (by FTIR), and its crystallinity. The result showed that the highest yield of 88.33% was obtained in acid hydrolysis at the concentration of 1M H2SO4. The results of the FTIR test showed that non-cellulose content had been removed and demonstrated that the molecular structure of cellulose does not change even when treated at different acid concentrations. X-Ray Diffraction analysis showed that crystallinity decreased by increasing the sulfamic acid concentration. The thermogravimetric analysis confirmed the heat resistance analysis and showed that the NCCs is gradually decomposed at a temperature range of 268.3–415.25 ¼C. The colour of cellulose nanocrystalline powder darkens as the sulfuric acid concentration increases.

Nd-Doped Fe3O4 Nanoparticles: Microwave Synthesis, Catalytic Properties in Selective Oxidation of Styrene

Nanocrystalline powder of neodymium substituted iron oxides samples were synthesized through the microwave approach. The synthesized pristine Fe3O4 and Nd-doped Fe3O4 structural properties were analyzed by the X-ray diffraction technique. The microstructural details, morphology and elemental composition were assessed by transmission and scanning electron microscopy attached with EDX. The Fe3O4 nanostructures possess spherical morphology as well as consistent particle size distribution, which is confirmed by HR-SEM. The formation of Fe3O4 with high purity was confirmed by EDX and XRD analysis. The particle size calculated by HR-TEM images and crystallite size through the XRD study showed that the value obtained by both the methods is nearly the same. The catalytic properties of Fe3O4 nanoparticles are examined in the selective oxidation of styrene.

Benefits on photocarrier transfer from transition of 3D to 2D morphology

The severe photogenerated carriers recombination of BiVO4 leads to poor performance and limits extensive commercial application. Here, the BiVO4 nanocrystalline powder and the epitaxial BiVO4 films were prepared by using...