scholarly journals Review: Synthesis, Characterization and Studies on Controlled Release Properties of Layered Compound

2021 ◽  
Vol 14 ◽  
pp. 1-17
Author(s):  
Sheikh ahmad izaddin Sheikh mohd ghazali
Keyword(s):  
Controlled Release ◽  
Fourier Transforms ◽  
Layered Compounds ◽  
Layered Compound ◽  
Water Treatment Process ◽  
Antimicrobial Studies ◽  
Co Precipitation ◽  
Double Hydroxide ◽  
Inorganic Structure

Layered inorganic structure such as Layered Double Hydroxide (LDH), zinc layered hydroxide (ZLH) and graphene, in nano-size, have been used widely in the nanotechnology areas as a new and promising problem solving materials. The ability of these inorganic layered compounds that able to encapsulate the organic anions were known to provide greatest benefits; were explained more details in this paper. Intercalations of anion into the interlayer spaces of layered inorganic structure such as anion-exchange, co-precipitation, hydrothermal method and reconstruction with ‘memory effect’ were also explained. The characterization of intercalated layered nanocomposites such as Fourier Transforms Infrared (FTIR) spectroscopy, PowderX-ray Diffraction (PXRD) analysis, Thermogravimetric analysis, surface analysis was used to explain the successful of anion intercalated in between the interlayer spaces of layered inorganic structures. The application of these hybrids that have been widely used such as controlled release properties in pharmaceutical area, antimicrobial studies, dyeing agent, enhancing UV Sunscreen protection, herbicides and water treatment process were also described in details.

Surface Modification of Synthesized Layered Double Hydroxide [LDH] for Methylene Blue Dye Removal in Textile Industry via Photocatalytic Activity under Visible Light

2017 ◽  
Vol 46 ◽  
pp. 135-147 ◽  
Author(s):  
K. Gohatre Omdeo ◽  
Vasudeo Rane Ajay ◽  
Kanny Krishnan ◽  
V.K. Abitha ◽  
Nikesh Samarth ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Layered Double Hydroxide ◽  
Layered Compounds ◽  
Layered Compound ◽  
Ammonium Bromide ◽  
X Ray ◽  
Surface Modified ◽  
Double Hydroxide

Layered double hydroxides (abbreviated as LDHs) are one of the nanoordered layered compounds. The importance of layered compound is based on their ability to retain chemical species with electrical charges compatible to those of the layers. In this study we have reported the synthesis of nanosized layered double hydroxide (LDH) by co-precipitation method using two different surfactants as cetyl trimethyl ammonium bromide (CTAB) and octadecyl trimethyl ammonium bromide (ODTMA) having different critical micelle concentration (CMC) /chain length and its comparative results on calcined surface modified LDH (CS-LDH). The structure of surface modified layered double hydroxide (CS-LDH) synthesized is unique and has important advantages to the photocatalytic activity. LDH has significant number of application due to their structural, chemical properties etc., these compounds can be used as catalyst, adsorbents, anion exchanger. The photocatalytic activity of prepared surface modified CS-LDH was tested on degradation of the methylene blue (MB) dye in an aqueous solution. The surface characteristics of LDH and CS-LDH were examined using Energy Dispersive X-ray (EDX), Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and UV-Visible spectrophotometer for Photocatalytic activity under visible light using MB dye. It was observed that highly exfoliated and basal spacing in CS-LDH-ODTMA which enhanced photocatalytic activity (Approx. 60% degradation) than that of comparison to CS-LDH-CTAB (Approx. 32% degradation).

The Syntheses and Characterization of Layered LiNi1-y-zMnyCozO2 Compounds

2002 ◽  
Vol 756 ◽  
Author(s):  
J. Katana Ngala ◽  
Natasha A. Chernova ◽  
Luis Matienzo ◽  
Peter Y. Zavalij ◽  
M. Stanley Whittingham
Keyword(s):  
Magnetic Susceptibility ◽  
Transition Metal ◽  
Powder Diffraction ◽  
Layered Structure ◽  
Transition Metal Ions ◽  
Layered Compounds ◽  
Layered Compound ◽  
X Ray ◽  
Initial Capacity

ABSTRACTThe layered compounds of formula LiNi0.4Mn0.6-yCoyO2, for y=0.2, 0.3, and 0.4 and LiNi0.7-yMn0.3CoyO2 for y=0.3, and 0.1 were synthesized at 800°C. X-ray powder diffraction indicates layered structure of R 3m symmetry similar to a-NaFeO2. Rietveld refinement data shows that Mn and Ni increase the tendency of transition metal ions to migrate into the interlayer sites relative to LiCoO2. Both magnetic susceptibility and XPS data support a 2+ oxidation state for Ni and 4+ and 3+ for Mn and Co, respectively. The layered compound LiNi0.4Mn0.4Co0.2O2 shows a high initial capacity of about 200mAh/g when cycled between 2.5V and 4.3 V at 20°C.

Inorganic layered double hydroxides as a 4-hexyl resorcinol delivery system for topical applications

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77709-77716 ◽  
Author(s):  
Damodar Mosangi ◽  
Sreejarani Kesavan Pillai ◽  
Lumbidzani Moyo ◽  
Suprakas Sinha Ray
Keyword(s):  
Controlled Release ◽  
Layered Double Hydroxide ◽  
Delivery System ◽  
Layered Double Hydroxides ◽  
Skin Tone ◽  
Precipitation Method ◽  
Co Precipitation ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Topical Applications

In this study, the hydrophobic even skin tone active, 4-hexylresorcinol is intercalated into a Zn–Al layered double hydroxide by co-precipitation method and used as controlled release ingredient in a skin care formulation.

scholarly journals Synthesis, characterization of Co1-xNixAl2O4 Spinel system and catalytic role in the synthesis of dihydropyrimidinone

2021 ◽  
Author(s):  
Teotone Vaz ◽  
Pranav P. Naik ◽  
Janesline Fernandes ◽  
Lalitprabha Salgaonkar ◽  
Snehal S. Hasolkar
Keyword(s):  
Fourier Transforms ◽  
Magnetic Behavior ◽  
Size Estimation ◽  
One Pot ◽  
Transmission Electron ◽  
Catalytic Role ◽  
The One ◽  
Co Precipitation ◽  
Citrate Precursor

Abstract In the present investigation, Spinel systems with chemical composition Co1 − xNixAl2O4 (x = 0.0, 0.25, 0.5, and 0.75) have been successfully synthesized by the co-precipitation citrate precursor technique. The phase formation, crystal structure, and impurity check were confirmed by X-ray powdered diffraction (XRD) and Fourier transforms infrared (FTIR) spectroscopy technique. The particle size estimation was done using a transmission electron microscope (TEM). Investigation of magnetic behavior and parameters such as saturation magnetization (MS), coercivity (HR), and retentivity (MR) was done using a vibrating sample magnetometer (VSM). The catalytic activity of prepared spinel systems was explored for the one-pot synthesis of dihydropyrimidinone derivatives. The catalytic product was identified by comparison of melting point and the spectral data (FTIR).

Exploring the characterization of Ni doped MgO nanoparticles using co-precipitation method

2020 ◽  
Vol 3 (1) ◽  
pp. 30-33
Author(s):  
Muthulakshmi M ◽  
Madhumitha G
Keyword(s):  
Magnesium Oxide ◽  
Analytical Techniques ◽  
Nickel Chloride ◽  
Precipitation Method ◽  
Crystalline Powder ◽  
High Melting Point ◽  
Design Synthesis ◽  
Mgo Nanoparticles ◽  
Co Precipitation

Nanotechnology is a field of applied science focused on design, synthesis and characterization of nanomaterials. The nickel and magnesium have improved their applications in transparent electrodes and nano electronics. In addition, magnesium oxide has moisture resistance and high melting point properties. In the present work has been carried out in the development of green crystalline powder of nickel doped magnesium oxide nanoparticles by Co-precipitation method, from the mixture of nickel chloride and magnesium chloride with KOH as solvent. From the XRD results, crystalline size of the particle can be observed. Spherical structure of Ni doped MgO nanoparticles were indicated by SEM results and powdered composition of samples were obtained from FTIR. EDAX represents the peak composition of the nanoparticle. The above analytical techniques have confirmed that the Ni doped MgO nanoparticles obtained from the mixture of NiCl2 and MgCl2.

Physical - Chemical Issues of Cephalosporin Intercalated Nanoparticles for Life - Threatening Infections Treatment

2001 ◽  
Vol 71 (3) ◽  
pp. 342-349
Author(s):  
Lucian Eva ◽  
Letitia Doina Duceac ◽  
Liviu Stafie ◽  
Constantin Marcu ◽  
Geta Mitrea ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Advanced Characterization ◽  
Generation Cephalosporin ◽  
Fourth Generation ◽  
Exchange Method ◽  
Physico Chemical ◽  
Life Threatening ◽  
Double Hydroxide ◽  
Double Hydroxides

The fourth generation cephalosporin antibacterial agent, cefepime, was loaded into layered double hydroxides for enhancing antibiotic efficiency, reducing side effects, as well as achieving the sustained release property. The intercalation of antibiotic into the inter-gallery of ZnAl-layered double hydroxide (LDH) was carried out using ion exchange method, by this constituting a nano-sized organic-inorganic hybrid material for a controlled release novel formulation. Although cefepime is a broad spectrum antibiotic, it has various adverse effects and a significant degradation rate. Thus, the preparation and physico-chemical characterization of nanomaterials able to intercalate this drug is an important study for medical and pharmaceutical field. The antibiotic inclusion into LDHs nanostructure was confirmed by advanced characterization techniques and the release profile of cefepime was analysed with the respect to pH of the simulated media.

Hydrogel-clay Nanocomposites as Carriers for Controlled Release

2020 ◽  
Vol 27 (6) ◽  
pp. 919-954 ◽  
Author(s):  
Raluca Ianchis ◽  
Claudia Mihaela Ninciuleanu ◽  
Ioana Catalina Gifu ◽  
Elvira Alexandrescu ◽  
Cristina Lavinia Nistor ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Controlled Release ◽  
Hybrid Materials ◽  
Pharmaceutical Formulations ◽  
Tree Of Life ◽  
Present Review ◽  
Clay Nanocomposites ◽  
Delivery Platform ◽  
Complex Hybrid

The present review aims to summarize the research efforts undertaken in the last few years in the development and testing of hydrogel-clay nanocomposites proposed as carriers for controlled release of diverse drugs. Their advantages, disadvantages and different compositions of polymers/biopolymers with diverse types of clays, as well as their interactions are discussed. Illustrative examples of studies regarding hydrogel-clay nanocomposites are detailed in order to underline the progressive researches on hydrogel-clay-drug pharmaceutical formulations able to respond to a series of demands for the most diverse applications. Brief descriptions of the different techniques used for the characterization of the obtained complex hybrid materials such as: swelling, TGA, DSC, FTIR, XRD, mechanical, SEM, TEM and biology tests, are also included. Enlightened by the presented data, we can suppose that hydrogel-clay nanocomposites will still be a challenging subject of global assiduous researches. We can dare to dream to an efficient drug delivery platform for the treatment of multiple affection concomitantly, these being undoubtedly like ”a tree of life” bearing different kinds of fruits and leaves proper for human healing.

scholarly journals A Review on LDH-Smart Functionalization of Anodic Films of Mg Alloys

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 536
Author(s):  
Mosab Kaseem ◽  
Karna Ramachandraiah ◽  
Shakhawat Hossain ◽  
Burak Dikici
Keyword(s):  
Industrial Applications ◽  
Mg Alloys ◽  
Anodic Films ◽  
Electrolytic Oxidation ◽  
Recent Developments ◽  
Plasma Electrolytic ◽  
Co Precipitation ◽  
Corrosive Environments ◽  
Double Hydroxide

This review presents an overview of the recent developments in the synthesis of layered double hydroxide (LDH) on the anodized films of Mg alloys prepared by either conventional anodizing or plasma electrolytic oxidation (PEO) and the applications of the formed composite ceramics as smart chloride traps in corrosive environments. In this work, the main fabrication approaches including co-precipitation, in situ hydrothermal, and an anion exchange reaction are outlined. The unique structure of LDH nanocontainers enables them to intercalate several corrosion inhibitors and release them when required under the action of corrosion-relevant triggers. The influences of different variables, such as type of cations, the concentration of salts, pH, and temperature, immersion time during the formation of LDH/anodic film composites, on the electrochemical response are also highlighted. The correlation between the dissolution rate of PEO coating and the growth rate of the LDH film was discussed. The challenges and future development strategies of LDH/anodic films are also highlighted in terms of industrial applications of these materials.

Sign in / Sign up

Export Citation Format

Share Document