Effects of drying conditions on physicochemical properties of epoxide sol−gel derived α-Fe2O3 and NiO: A comparison between xerogels and aerogels

Growth Processing and Strategies: A Way to Improve the Gas Sensing Performance of Nickel Oxide-Based Devices

“…Babei et al [119] synthesized NiO gel by dissolving 2.0 g (8.41 mmol) in 13.5 mL of absolute ethanol, resulting in a homogeneous and clear solut g (92.5 mmol) of propylene oxide was added dropwise to the solution wh sulting in a PO:Ni molar ratio of 11:1. The solution was stirred for 10 min a ferred into a syringe.…”

“…Xerogels were found to have a more compact struc to aerogels, which was reflected in their lower mesopore volume and specifi However, aerogels had a more porous structure and smaller particle sizes This was attributed to the collapse of the pore structure during the evapo process that led to the formation of dense clusters of xerogel particles and surface area and pore volume. This collapse was caused by the formatio Babei et al [119] synthesized NiO gel by dissolving 2.0 g (8.41 mmol) of NiCl 2 6H 2 O in 13.5 mL of absolute ethanol, resulting in a homogeneous and clear solution. Next, 5.37 g (92.5 mmol) of propylene oxide was added dropwise to the solution while stirring, resulting in a PO:Ni molar ratio of 11:1.…”

Controllable Synthesis, Photocatalytic Property, and Mechanism of a Novel POM-Based Direct Z-Scheme Nano-Heterojunction α-Fe2O3/P2Mo18

“…Typically, γ-Fe 2 O 3 has been introduced in the field of photocatalysts, giving rise to composite materials with magnetic features and enhancing the separation of photo-induced carriers [ 30 ]. In recent years, a series of α-Fe 2 O 3 nanoparticles with different morphologies has been synthesized using sol-gel [ 31 ], low-temperature calcination [ 32 ], and hydrothermal methods [ 33 ]. Although Fe 2 O 3 has a broad absorption range, it is unsuitable for use as an ideal photocatalyst due to the difficulties in producing electron-hole pairs.…”