Synthesis of Surface-Modified Iron Oxides for the Solvent-Free Recovery of Bacterial Bioactive Compound Prodigiosin and Its Algicidal Activity

2016 ◽  
Vol 120 (36) ◽  
pp. 9685-9696 ◽  
Author(s):  
K. V. Arivizhivendhan ◽  
M. Mahesh ◽  
R. Boopathy ◽  
K. Patchaimurugan ◽  
P. Maharaja ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Bioactive Compound ◽  
Solvent Free ◽  
Algicidal Activity ◽  
Surface Modified

Surface modification of ferrite nanoparticles with dicarboxylic acids for the synthesis of 5-hydroxymethylfurfural: a novel and green protocol

RSC Advances ◽  
2016 ◽  
Vol 6 (80) ◽  
pp. 76795-76801 ◽  
Author(s):  
Melad Shaikh ◽  
Mahendra Sahu ◽  
Kiran Kumar Atyam ◽  
Kalluri V. S. Ranganath
Keyword(s):  
Surface Modification ◽  
Dicarboxylic Acids ◽  
Ferrite Nanoparticles ◽  
Solvent Free ◽  
Green Protocol ◽  
Flexible Ligand ◽  
Solvent Free Conditions ◽  
Surface Modified

5-Hydroxymethylfurfural (5-HMF) has been synthesized under solvent free conditions using surface modified ferrite nanoparticles. The flexible ligand modified ferrites showed higher activity than rigid modified ferrites.

scholarly journals Scope of surface-modified molecular and nanomaterials in gel/liquid forms for developing mechanically flexible DSSCs/QDSSCs

2019 ◽  
Vol 18 (1) ◽  
pp. 15-29 ◽  
Author(s):  
Soorya Sasi ◽  
Sunish K. Sugunan ◽  
P. Radhakrishnan Nair ◽  
K. R. V. Subramanian ◽  
Suresh Mathew
Keyword(s):  
Optoelectronic Properties ◽  
Solvent Free ◽  
Optoelectronic Materials ◽  
Semiconducting Materials ◽  
Surface Modified

In this perspective article, we discuss the possibilities of integrating liquefied organic and inorganic semiconducting materials with tunable optoelectronic properties into solvent-free fluidic systems of functional optoelectronic materials to generate flexible DSSCs/QDSSCs.

scholarly journals Comparison of Cation Anion Dye Removal Characteristics between Kelp-based Magnetic Biochar and Pine-based Magnetic Biochar

2020 ◽  
Vol 42 (6) ◽  
pp. 308-318 ◽  
Author(s):  
Hee So Oh ◽  
Jae-Soo Chang
Keyword(s):  
Adsorption Capacity ◽  
Iron Oxides ◽  
Second Order ◽  
Kinetics Model ◽  
Isotherm Models ◽  
Adsorptive Capacity ◽  
Magnetic Biochar ◽  
Adsorption Capacities ◽  
Pseudo Second Order ◽  
Surface Modified

Objectives:This study investigates the adsorption capacity of magnetic biochar (KB-Fe) derived from kelp for two dyes, Congo red (CR) and crystal violet (CV), which have different charge characteristics. The adsorption capacities were compared to magnetic biochar (PB-Fe) derived from pine.Methods:Pristine biochars (KB, PB) were produced through the pyrolysis of kelp and pine sawdust at 500℃. Magnetic biochars (KB-Fe, PB-Fe) were produced by treatment of 60 g of biomass in 1 L of 0.1 M FeCl<sub>3</sub>･6H<sub>2</sub>O and pyrolysis of the raw materials at 500℃. The fundamental characteristics of the biochars were analyzed, and the adsorption capacities of the biochars for the CR and CV dyes were evaluated based on two adsorption isotherm models, two adsorption kinetics models, and adsorption characteristics based on changes to the pH between 5 and 11.Results and discussion:CR adsorption by all biochars decreased with an increase in pH. When KB and PB were surface-modified with magnetic iron oxides, their adsorption capacity for CR increased. CV adsorption by all biochars increased with pH. When KB and PB were surface-modified with magnetic iron oxides, their adsorption capacity for CV considerably decreased. According to the Langmuir isotherm model, the adsorption capacity for CR was in the order of KB-Fe, KB, PB-Fe, and PB, and the adsorption capacity for CV was in the order of KB, PB, PB-Fe, and KB-Fe. The CR adsorption was better described by the pseudo-second order kinetics model for all biochars, with the exception of KB-Fe. CV adsorption was also better described by the pseudo-second order kinetics model for all biochars, with the exception of KB.Conclusions:The results show that kelp biochar has great potential for the adsorptive removal of CR and CV compared to pine-based biochar. In addition, it was demonstrated that surface modification of kelp biochar with magnetic iron oxides can significantly improve its adsorptive capacity for anionic dyes; however, its adsorptive capacity for cationic dyes decreases.

Magnetic Submicron Powder Preparation and Characterization

2011 ◽  
Vol 672 ◽  
pp. 281-285
Author(s):  
Ciprian Axinte ◽  
Claudia Nadejde ◽  
Manuela Ursache ◽  
Anton Airinei ◽  
Aurelian Cirlescu ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Room Temperature ◽  
Reaction Medium ◽  
Solvent Free ◽  
Alternative Methods ◽  
Powder Preparation ◽  
X Ray ◽  
Co Precipitation ◽  
Submicron Powder ◽  
Additional Iron

The goal of this experimental study was to present a comparative analysis of iron oxides powders obtained by two alternative methods, i.e. the co-precipitation at high temperature from aqueous reaction medium of iron oxides and, respectively, the solvent free method for the preparation magnetite at room temperature. Vibrational absorption spectra evidenced the dominancy of magnetite in both samples, while the X-ray diffractograms revealed the submicron size as well as the presence of additional iron oxide, in the second sample prepared by solvent free method.

A new method for the preparation of 1,3,5-triarylbenzenes catalyzed by nanoclinoptilolite/HDTMA

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 10869-10877 ◽  
Author(s):  
R. Tayebee ◽  
M. Jarrahi ◽  
B. Maleki ◽  
M. Kargar Razi ◽  
Z. B. Mokhtari ◽  
...  
Keyword(s):  
Efficient Method ◽  
Solvent Free ◽  
New Method ◽  
Reusable Catalyst ◽  
Natural Surface ◽  
Solvent Free Conditions ◽  
Surface Modified

An efficient method for the preparation of 1,3,5-triarylbenzenes. Natural surface-modified NCP as a new and reusable catalyst. Using solvent-free conditions.

Analytical Electron Microscopy of Surface-Modified Ceramics

1985 ◽  
Vol 43 ◽  
pp. 276-279
Author(s):  
P. S. Sklad
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Theoretical Models ◽  
Ceramic Materials ◽  
Solute Concentration ◽  
Second Phase ◽  
Analytical Electron ◽  
Implantation Techniques ◽  
Lattice Damage ◽  
Surface Modified

Over the past several years, it has become increasingly evident that materials for proposed advanced energy systems will be required to operate at high temperatures and in aggressive environments. These constraints make structural ceramics attractive materials for these systems. However it is well known that the condition of the specimen surface of ceramic materials is often critical in controlling properties such as fracture toughness, oxidation resistance, and wear resistance. Ion implantation techniques offer the potential of overcoming some of the surface related limitations.While the effects of implantation on surface sensitive properties may be measured indpendently, it is important to understand the microstructural evolution leading to these changes. Analytical electron microscopy provides a useful tool for characterizing the microstructures produced in terms of solute concentration profiles, second phase formation, lattice damage, crystallinity of the implanted layer, and annealing behavior. Such analyses allow correlations to be made with theoretical models, property measurements, and results of complimentary techniques.

Sign in / Sign up

Export Citation Format

Share Document