Supercritical CO₂ drying of alginate/zinc hydrogels: a green and facile route to prepare ZnO foam structures and ZnO nanoparticles

Abstract

In the present study, we investigate a simple and effective synthetic protocol to produce zinc oxide foams by a facile solution-based method using alginate gelation.

Rectifying ZnO–Na/ZnO–Al aerogels p-n homojunctions

“…Untreated pure ZnO aerogel exhibited a specific surface area of 152 m 2 /g. After heat treatment an expected loss of surface area was observed [2,44]. This evident surface area drop is also justified because the samples experience self-combustion during heat treatment.…”

Enhanced antibacterial and anticancer activities of plant extract mediated green synthesized zinc oxide-silver nanoparticles

“…Characteristic peaks of hydroxyl groups, due to atmospheric moisture absorption, were detected between 3332 and 3385 cm −1 . This stretching mode of O-H groups can be due to the formation of inter-and intra-molecular hydrogen bonds in the sample (Abou Oualid et al, 2017). Broad band ranging from 401 cm −1 to 530 cm −1 , highlighted the red dotted box, can be attributed to the stretching vibration of ZnO (Rohith et al, 2018).…”

Comparison of green bio-based cerium/alginate vs. copper/alginate beads: a study of vibrational and thermal properties using experimental and theoretical methods

“…To assist the experimental section, the density functional theory (DFT) method was employed as an additional technique for studying the complexation process. The static DFT-based optimization of the different Alg metal ion(s) complexes can shed light in their molecular structure, and also helps to nd the different nature of the metal-alginate correlations, build based on the speci c type of metal (transition metals for Cu and lanthanides metals for Ce) [14][15][16]46] The theoretical examination presented in this manuscript helps to support the experimental results done by our research group. The key objectives of this joint experimental/computational analysis can be summed up as follows:…”

“…Many works have been reported to explain the gel strengths and stability conditions induced by different metal ions [2,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Alginate polymers containing trivalent cations have been recycled to formulate goldbased nanoparticles [22] and bimetallic catalysts [18].…”