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1 SEM images of (a) colloidal crystal (opal structure) of PMMA spheres and (b and c) 3DOM LaFeO 3 prepared by the colloidal crystal template method.
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This chapter summarizes preparation methods and applications of three-dimensionally ordered macroporous (3DOM) perovskite mixed metal oxides. 3DOM perovskite mixed metal oxides have been prepared using polymer sphere templates, and polymer spheres have been removed by calcination. Selection of polymer templates is also important, because size of ma...
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Citations
... These conventional fillers are micron-sized and didn't fabricate with the physical and chemical properties of the nanoparticles (NPs). Therefore, with this sharply expanding research area of the NCPs materials, these days it has been possible to procreate many exciting new materials with novel properties, through innovative synthetic procedures [21]. The properties of the so-called found not only depended on their originals but also crucially on their interfacial and morphological features. ...
During the last two decades, over more than five million research papers (articles, reviews, communications etc.) were published on nanocomposite materials. Most of them are excellent contributions that already mingle the readers’ and researchers’ interests; thus gaining many citations. This mini-review is focused on advancement in next-generation nanocomposite materials based on optical and sensing applications; and their practical execution. Some recent novel developments will be highlighted and future trends will be discussed. Nowadays, nanocomposite has ended up one of the most popular materials with potential usage in various scope, including packaging, automotive and aerospace industry, batteries with higher power output, flexible batteries, making lightweight sensors, in photocatalysis and making tumours easier to look at and to eliminate. New materials, viz. designed polymers, metal oxides, alloys, chalcogenides, nanostructured and hierarchical carbons, regularly induced researchers and engineers; to test and compare them with existing sensors of multifarious sorts. Nanocomposites not only offers’ the new technology and business opportunities in all sectors of the industry but also it tender innovations and new openings for all divisions.
... Such substitution systems are referred as mixed MOs e.g. spinels [2] or perovskites [3,4]. ...
Large volumes of unconventional fossil resource are untapped because of the capillary forces, which kept the oil stranded underground. Furthermore, with the increasing demand for sustainable energy and the rising attention geared towards environment protection, there is a vital need to develop materials that bridge the gap between the fossil and renewable resources effectively. An intensive attention has been given to nanomaterials, which from their native features could increase either the energy storage or improve the recovery of fossil energy. The present chapter , therefore, presents the recent advancements of nanotechnology towards the production of unconventional resources and renewable energy. The chapter focuses primarily on nanomaterials applications for both fossils and renewable energies. The chapter is not intended to be an exhaustive representation of nanomaterials, rather it aims at broadening the knowledge on functional nanomaterials for possible engineering applications.
... The enhanced performance was correlated with the higher dispersion of PtPd NPs within the SiO 2 shell after aging. For the purpose of enhancing the thermal stability of Pt toluene combustion catalysts without inducing severe mass transport limitations, Pei and co-workers [175] developed an in situ synthesis method to partially embed Pt NPs into three-dimensionally ordered macroporous (3DOM) Mn 2 O 3 , whereby the Mn 2 O 3 structure consists of a three-dimensional structure with ordered spherical macropores (>50 nm) which is prepared by a colloidal template method [176]. 2.3 wt% Pt/Mn 2 O 3 -3DOM exhibited the best catalytic performance. ...
Supported nanoparticles are commonly applied in heterogeneous catalysis. The catalytic performance of these solid catalysts is, for a given support, dependent on the nanoparticle size, shape, and composition, thus necessitating synthesis techniques that allow for preparing these materials with fine control over those properties. Such control can be exploited to deconvolute their effects on the catalyst’s performance, which is the basis for knowledge-driven catalyst design. In this regard, bottom-up synthesis procedures based on colloidal chemistry or atomic layer deposition (ALD) have proven successful in achieving the desired level of control for a variety of fundamental studies. This review aims to give an account of recent progress made in the two aforementioned synthesis techniques for the application of controlled catalytic materials in gas-phase catalysis. For each technique, the focus goes to mono- and bimetallic materials, as well as to recent efforts in enhancing their performance by embedding colloidal templates in porous oxide phases or by the deposition of oxide overlayers via ALD. As a recent extension to the latter, the concept of area-selective ALD for advanced atomic-scale catalyst design is discussed.
This book presents the research results on the optical, sensory, and photocatalytic properties of hybrid nanocomposites with applications focused on optical and sensor studies and presents the unique techniques of synthesis and microstructure analysis of functional nanocomposites. Some results covered in this edition are devoted to structural changes upon interaction with the light, also sensitivity and selectivity during electrochemical systems. Some articles deal with analysing the use of MOFs' unique optical and sensory properties, nanostructured rare earth metal oxides, and inorganic nanocomposites in real sensor structures. Most of the research results are first reported, and the book will be helpful to specialists in sensor engineering, optoelectronics, and photocatalysis.
This issue introduces readers to the results of scientific research and engineering projects in materials for sensors and energy storage devices, technologies for wastewater and water treatment, incremental metal sheet forming technology, and assessment of technological damages for concrete columns in construction.
Materials with hierarchical porosity
are a current exciting area in materials chemistry and are attractive for many applications such as photonics, catalysis, adsorption/desorption, drug delivery… This review highlights the parallel development of the mesostructuring and macrostructuring routes to synthesize siliceous materials with highly controlled porosity. A particular focus is given on the combination of surfactant/colloidal dual templating which constitutes a powerful method to shape the textural/morphological properties of the siliceous materials at the meso- and macroscale. Nano-engineering of the structuring agents
and the study of their interaction with the silica precursor (with the help of theoretical simulations) are presented. Strategies to improve diffusion of species within the hierarchical porous networks are proposed and put into perspectives. Besides, this chapter will also highlight some of the recent applications of functionalized 3D ordered macroporous–mesoporous silica materials in heterogeneous catalysis
. Selected applications like biofuel synthesis, volatile organic compound removal, and oxidation reactions are examined. The impact of hierarchical materials on the catalytic performance is compared with mono-modal pore size materials.
