Journal of Inorganic and Organometallic Polymers and Materials最新文献

Nanotechnology was founded in the mid-twentieth century, contributing to the development of science and technology at the nano and micro levels. The next step can be achieved through nanoarchitectonics, a post-nanotechnology concept. The nanoarchitectonics approach emphasises the importance of science and technology in the nano world opened up by nanotechnology for synthesising functional materials that actually work. This methodology can also be applied to the development of sensors and related sensing systems. This review will consider the role of nanoarchitectonics in developing such materials by adopting the following methodology. First, several research papers related to sensor research that include ‘nanoarchitectonics’ in the title will be selected. These examples will demonstrate how the concept of nanoarchitectonics is applied to sensor development. The next section will examine the possibility of constructing sensing structures from a materials perspective. This will be demonstrated by showing that diverse and hierarchical sensing structures can be created from fullerenes, which are single-element zero-dimensional materials. The third section will present examples of material structures that can transmit signals and interface with devices. The final section will discuss the future directions and requirements of nanoarchitectonics research for sensor development, based on the information obtained.

Graphical Abstract

The sustainable development of multifunctional nanomaterials is vital for addressing environmental and food preservation challenges. In this study, Mn₃O₄ nanoparticles (NPs) and Mn₃O₄/Fe₂O₃ nanocomposites (NC) were synthesized using lemon peel extract and systematically evaluated for their antioxidant, photocatalytic, and preservation properties. Structural and physicochemical characterization (UV–Vis, XRD, FTIR, SEM, and zeta potential) confirmed the successful formation of stable nanostructures with a reduced bandgap in the NC (1.87 eV) compared to Mn₃O₄ (2.46 eV). The NC exhibited enhanced antioxidant performance with a lower DPPH IC₅₀ (284.88 µg/mL) than Mn₃O₄ (369.68 µg/mL), while reducing power reached 0.5 absorbance at 700 nm, indicating improved redox activity. Photocatalytic degradation efficiencies under sunlight reached 97.3% for Rhodamine B (RB) and 88.6% for Methyl Orange (MO) within 75 min, with respective rate constants of 0.049 and 0.030 min⁻¹. In preservation trials, NC-coated raspberries and blackberries showed markedly reduced spoilage (24% and 9%) and weight loss (7.5% and 6.5%) by day 10, outperforming starch-coated and uncoated controls. This work is the first to demonstrate a lemon peel-derived Mn₃O₄/Fe₂O₃ NC with integrated antioxidant, photocatalytic, and food preservation capabilities, highlighting its potential as a scalable, biocompatible material for sustainable applications. Further investigations into cytotoxicity, migration, and industrial scalability are recommended.

The present investigation demonstrates the creation of NaFeO₂/rGO through an easy hydrothermal approach. Physical investigations showed that NaFeO₂/rGO had a unique nanostructure with enhanced surface area, conductivity, crystallinity and shape, resulting in impressive electrode material. Scanning electron microscopy studies revealed that NaFeO₂ was closely dispersed on rGO and Brunner-Emmett-Teller analysis indicated that the electrode substance had a significant surface area. The electrochemical investigation of manufactured materials was evaluated using 3 electrodes in basic electrolyte solution of 3.0 M KOH. The synthesized NaFeO₂/rGO demonstrated a remarkable greater specific capacitance (C_s) (1221.97 F/g) in contrast to pure NaFeO₂ at 1 A/g. Additionally, nanocomposite represented an elevated energy density (E_d) (33.75 Wh/kg) and power density (P_d) (223 W/kg) together with extraordinary cyclic stable activity (5000th cycle). The increased electrochemical efficiency of composite is due to the combined effect of NaFeO₂ and rGO which offer a significant area for contact and efficient charge transfer routes. These properties of the NaFeO₂/rGO nanocomposite offer excellent stability and cost effectiveness, as well as a promising alternative for usage in supercapacitor applications in future.

Solid oxide fuel cells (SOFCs) are efficient energy conversion devices with excellent fuel flexibility and minimum environmental impact. Recent progress has revealed that iron oxide composites are one of the essential materials in SOFCs technology due to their superior electrochemical performance, thermal stability, and cost-effectiveness. This review discusses the crucial roles of iron oxide composites in SOFCs. In addition, the development and classification of ferrite-based SOFCs materials are reviewed. Advances in symmetrical SOFCs based on ferrite oxides are categorized, and reversible SOFCs are discussed for dual functionality. Synergy between iron oxides is analyzed for the improvement in ionic conductivity, catalytic activity, and redox stability that improves the performance and durability of these materials. Challenges are discussed at the conclusion of the review, with future directions of research needed to optimize the iron oxide composite in order to bridge the gap of high performance in SOFCs with economically sustainable technology.