Abstract
Layered double hydroxides (LDHs) and anionic clay are nano-ordered layered compounds and are well known for their ability to intercalate anionic compounds. Most LDHs are prepared conventionally only with di- and tri-valent cations. Alumina-silicate structures are very familiar in the literature as cationic clay or zeolite structure, however, there is no data for alumina-silicate as anionic clay. In this study, a new series of Zn-Al-Si LDHs with various Zn/Al/Si ratios, consisting of di-, tri-, and tetra-valent cations, were prepared and characterized by energy-dispersive X-ray spectrometry (SEM/EDS), X-ray powder diffraction (XRD), infrared spectra (IR), thermal analyses (TG, DTG and DTA), and scanning electron microscopy (SEM). Characterization of the samples containing molar percentages of aluminum and silicon 20∼40 % revealed formation of well crystallized phases, layered structures and no excess phases. XRD results and thermal analyses indicated that the carbonate anions have two orientations inside the interlayer region. After intercalation reactions with organic acids, mono- and di-carboxylic acids, the interlayer spacing of Zn – Al – Si LDH increased and organic – inorganic nano-hybrid materials formed. SEM images showed that the morphology of Zn – Al – Si LDH before and after intercalation reactions is plate-like structure. The results presented in this work conclude that the formation of the layer double hydroxide is not limited to the reactions between di- and trivalent cations, although these are the only reactions reported by many researchers.
Keywords: Nano structured materials, nano layered materials, new layered double hydroxides, nano hybrid materials, host-guest interactions
Call for Papers in Thematic Issues
Role of nanomaterials in fabrication of coatings, Machining and Joining
The application of nanoscience has brought about a revolution in the field of mechanical engineering by providing novel materials, boosting manufacturing processes, and generating cutting-edge products. The purpose of this special issue is to investigate the enormous impact that nanoscience has had on mechanical engineering, with a particular emphasis on ...read more
Advanced Inorganic Nanocomposites and Their Emerging Applications
This special issue collection will highlight developments on the recent trends about the synthesis of metal oxides, nanoclusters, biomaterials, 2D nanomaterials, nanocrystals, nanocomposites, etc. and their applications in electrochemical systems, tissue regeneration, energy storage and harvesting, sensors, etc. The novelty of the methods in the chemical synthesis and their characterizations, ...read more
Applicability of Nanotechnology for Performance Enhancement of Clean Energy Technologies
Population growth, industrialization, and improvement in living quality would lead to further increase in energy demand in near future. Regarding the disadvantages of fossil fuels such as fluctuations in their price, high emissions of greenhouse gases and restriction of their sources, it is crucial to use and exploit alternative energy ...read more
Graphene and 2D Materials for Energy Storage and Conversion
This thematic issue will discuss the recent advances in graphene-based nanomaterials for different energy technologies. Graphene possesses a high surface area, and stable structure and exhibits many interesting electronic, optical, and mechanical properties due to its 2D crystal structure. Graphene is of both fundamental interest and suitable for a wide ...read more
Related Books
Nanoscale Field Effect Transistors: Emerging Applications
Nanoelectronics Devices: Design, Materials, and Applications Part II
Nanoelectronics Devices: Design, Materials, and Applications (Part I)
Role of Nanotechnology in Cancer Therapy
Synthesis and Applications of Semiconductor Nanostructures
Pathways to Green Nanomaterials: Plants as Raw Materials, Reducing Agents and Hosts
Applications of Nanomaterials in Medical Procedures and Treatments
Synthesis of Nanomaterials
Nanobiotechnology: Principles and Applications
Bio-Inspired Nanotechnology
15