Experimental and Theoretical Study of Low-Dimensional Iron Oxide Nanostructures

Fe3O4/γ-Fe2O3 Nanoparticle Multilayers Deposited by the Langmuir–Blodgett Technique for Gas Sensors Application

“…Important progress has been made for obtaining uniform iron oxides NPs with tunable chemical and magnetic properties. Some of the iron oxide nanoparticles (NPs) synthesis techniques include chemical precipitation, sol–gel, hydrothermal, surfactant-mediated precipitation, emulsion precipitation, microemulsion precipitation, electrodeposition, and microwave-assisted hydrothermal technique. − The first literature on NPs synthesis methods demonstrated that thermal decomposition of iron oleate complex can produce monodisperse iron oxides NPs in an ultralarge scale; hence, it has become the main approach to high quality iron oxides NPs production. ,, Since the mechanism leading to the chemical conversions into Fe 3 O 4 or Fe 2 O 3 is complicated by the multicomponent reactants present in the reaction mixture, a lot of efforts are paid to find the best reliable and simplified recipe that allows a better stoichiometry control and tuning of nanoparticle dimensions.…”

Rapid Microwave Method for Synthesis of Iron Oxide Particles under Specific Conditions

“…However, designing the iron oxide particles of defined size and morphology for targeted applications is still a major research challenge. In their book, Yue et al highlighted the great challenge of how to efficiently synthesize iron oxides with controlled morphology, size, and functionality and how to fundamentally understand the formation, growth mechanisms, and structure of iron oxide particles [18]. Machala et al, in their review paper, described parameters affecting polymorphous transformations of iron oxides, which is a great challenge in the study of polymorphism of solid compounds [19].…”

“…In recent years, the influence of added polysaccharides [65,66], surface-active substances [42,[67][68][69][70][71][72][73], soluble polymers, and biopolymers [18,20,44,72,[74][75][76] was intensively studied under the influence of various experimental factors in the abovementioned synthesis for iron oxide nano/microstructures. The role of various additives in the synthesis of iron oxide fascinates scientists because of the impact on the morphology of particles: both on the internal properties of particles and the external parameters (e.g., particle morphology, degree of particle aggregation, the size distribution of particles) and polymorphous transformation pathways.…”

Cu2O/ZnO p–n Junction Decorated with NiOx as a Protective Layer and Cocatalyst for Enhanced Photoelectrochemical Water Splitting

“…Photoelectrochemical (PEC) water splitting represents an attractive method to capture and store the immense energy of sunlight in the form of hydrogen, a clean chemical fuel. − To accomplish efficient solar energy conversion in the PEC water splitting cell, the semiconductor photoelectrode should meet the essential criteria including efficient sunlight absorption and carrier separation, high water splitting activity, and long-term stability. − In the past decades, n-type semiconductors such as TiO 2 , WO 3 , Fe 2 O 3 , and BiVO 4 have been extensively studied in the photoanode for PEC water oxidation. − However, there are relatively fewer stable and narrow band gap p-type candidates for the PEC water reduction to produce hydrogen fuel.…”