Fabrication of high performance amine-rich magnetic composite fibers for the recovery of precious Pt(iv) from acidic solutions

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89089-89097 ◽  
Author(s):  
Myung-Hee Song ◽  
D. Harikishore Kumar Reddy ◽  
Yeoung-Sang Yun
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Treatment ◽  
Aqueous Solutions ◽  
Active Sites ◽  
High Performance ◽  
High Surface ◽  
Volume Ratio ◽  
Magnetic Composite ◽  
Composite Fibers ◽  
Acidic Solutions

Magnetic nanoparticles (MNPs) possessing a high surface to volume ratio, copious chemically active sites, and ease of separation from aqueous solutions are emerging materials for water treatment.

Nanomaterial-based gas sensors used for breath diagnosis

2020 ◽  
Vol 8 (16) ◽  
pp. 3231-3248 ◽  
Author(s):  
Xinyuan Zhou ◽  
Zhenjie Xue ◽  
Xiangyu Chen ◽  
Chuanhui Huang ◽  
Wanqiao Bai ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Gas Sensors ◽  
Active Sites ◽  
Gas Sensing ◽  
High Surface ◽  
Volume Ratio ◽  
Sensing Applications ◽  
Enormous Number

Gas-sensing applications commonly use nanomaterials (NMs) because of their unique physicochemical properties, including a high surface-to-volume ratio, enormous number of active sites, controllable morphology, and potential for miniaturisation.

Functionalized Magnetic Nanoparticles for Environmental Remediation

2017 ◽  
pp. 705-741
Author(s):  
Ravindra Kumar Gautam ◽  
Shivani Soni ◽  
Mahesh Chandra Chattopadhyaya
Keyword(s):  
Heavy Metals ◽  
Magnetic Nanoparticles ◽  
Environmental Remediation ◽  
Anthropogenic Activities ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Toxic Metal ◽  
Volume Ratio ◽  
Removal Of Heavy Metals

Water pollution by anthropogenic activities is proving to be of critical concern as the heavy metals affect aquatic organisms and can quickly disperse to large distances. This poses a risk to both human health and the aquatic biota. Hence, there is a need to treat the wastewater containing toxic metals before they are discharged into the water bodies. During recent years, magnetic nanoparticles came to the foreground of scientific interest as a potential adsorbent of novel wastewater treatment processes. Magnetic nanoparticles have received much attention due to their unique properties, such as extremely small size, high surface-area-to-volume ratio, surface modifiability, multi functionality, excellent magnetic properties, low-cost synthesis, and great biocompatibility. The multi-functional magnetic nanoparticles have been successfully applied for the reduction of toxic metal ions up to ppb level in waste-treated water. This chapter highlights the potential application of magnetic nanoparticles for the removal of heavy metals.

Functionalized Magnetic Nanoparticles for Environmental Remediation

2015 ◽  
pp. 518-551 ◽  
Author(s):  
Ravindra Kumar Gautam ◽  
Shivani Soni ◽  
Mahesh Chandra Chattopadhyaya
Keyword(s):  
Heavy Metals ◽  
Magnetic Nanoparticles ◽  
Environmental Remediation ◽  
Anthropogenic Activities ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Toxic Metal ◽  
Volume Ratio ◽  
Removal Of Heavy Metals

Water pollution by anthropogenic activities is proving to be of critical concern as the heavy metals affect aquatic organisms and can quickly disperse to large distances. This poses a risk to both human health and the aquatic biota. Hence, there is a need to treat the wastewater containing toxic metals before they are discharged into the water bodies. During recent years, magnetic nanoparticles came to the foreground of scientific interest as a potential adsorbent of novel wastewater treatment processes. Magnetic nanoparticles have received much attention due to their unique properties, such as extremely small size, high surface-area-to-volume ratio, surface modifiability, multi functionality, excellent magnetic properties, low-cost synthesis, and great biocompatibility. The multi-functional magnetic nanoparticles have been successfully applied for the reduction of toxic metal ions up to ppb level in waste-treated water. This chapter highlights the potential application of magnetic nanoparticles for the removal of heavy metals.

Semimetallic vanadium molybdenum sulfide for high-performance battery electrodes

2018 ◽  
Vol 6 (20) ◽  
pp. 9411-9419 ◽  
Author(s):  
Qingfeng Zhang ◽  
Longlu Wang ◽  
Jue Wang ◽  
Xinzhi Yu ◽  
Junmin Ge ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Electrode Material ◽  
High Performance ◽  
High Surface ◽  
Volume Ratio ◽  
Lithium Ion ◽  
Diffusion Path ◽  
Molybdenum Sulfide ◽  
Two Dimensional

The ultrathin thickness and lateral morphology of a two dimensional (2D) MoS2 nanosheet contribute to its high surface-to-volume ratio and short diffusion path, rendering it a brilliant electrode material for lithium-ion batteries (LIBs).

One-dimensional inorganic semiconductor nanostructures: A new carrier for nanosensors

2010 ◽  
Vol 82 (11) ◽  
pp. 2185-2198 ◽  
Author(s):  
Xiaosheng Fang ◽  
Linfeng Hu ◽  
Changhui Ye ◽  
Lide Zhang
Keyword(s):  
High Performance ◽  
High Surface ◽  
Volume Ratio ◽  
Semiconductor Nanostructures ◽  
One Dimensional ◽  
Semiconductor Nanostructure ◽  
Research Activities ◽  
Wide Range ◽  
Inorganic Semiconductor ◽  
Art Research

One-dimensional (1D) inorganic semiconductor nanostructures have witnessed an explosion of interest over the last decade because of advances in their controlled synthesis and unique property and potential applications. A wide range of gases, chemicals, biomedical nanosensors, and photodetectors have been assembled using 1D inorganic semiconductor nanostructures. The high-performance characteristics of these nanosensors are particularly attributable to the inorganic semiconducting nanostructure high surface-to-volume ratio (SVR) and its rationally designed surface. In this review, we provide a brief summary of the state-of-the-art research activities in the field of 1D inorganic semiconductor nanostructure-based nanosensors. Some perspectives and the outlook for future developments in this area are presented.

A new paradigm of ultrathin 2D nanomaterial adsorbents in aqueous media: graphene and GO, MoS2, MXenes, and 2D MOFs

2019 ◽  
Vol 7 (28) ◽  
pp. 16598-16621 ◽  
Author(s):  
Pin Zhao ◽  
Meipeng Jian ◽  
Qi Zhang ◽  
Rongming Xu ◽  
Ruiping Liu ◽  
...  
Keyword(s):  
Surface Area ◽  
Active Sites ◽  
High Performance ◽  
High Surface ◽  
Aqueous Media ◽  
High Surface Area ◽  
Atomic Level ◽  
New Paradigm ◽  
2D Nanomaterials

Due to the high surface area, atomic-level thickness, and abundant exposed active sites, 2D nanomaterials are regarded potential high-performance adsorbents. We review four representative nanomaterials, graphene, MoS2, MXenes, and MOFs, for this application.

scholarly journals Immobilization of Protein A on Monodisperse Magnetic Nanoparticles for Biomedical Applications

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Bui Trung Thanh ◽  
Nguyen Van Sau ◽  
Heongkyu Ju ◽  
Mohammed J. K. Bashir ◽  
Hieng Kiat Jun ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Magnetic Nanoparticles ◽  
Biomedical Applications ◽  
Point Of Care ◽  
High Surface ◽  
Protein A ◽  
Volume Ratio ◽  
Controlled Drug Release ◽  
Disease Diagnosis

We presented synthesis and physical characterization of iron oxide magnetic nanoparticles (Fe3O4) for biomedical applications in the size range of 10-30 nm. Magnetic nanoparticles were synthesized by the coprecipitation method, and the particles’ size was controlled by two different injection methods of sodium hydroxide (NaOH). The synthesized magnetic nanoparticles were then modified by using series of linkers including tetraethyl orthosilicate (TEOS), 3-aminopropyltriethoxysilane (APTES), and glutaraldehyde (GA) to generate the structure of Fe3O4/SiO2/NH2/CHO, which can be used for immobilization of protein A. Additionally, we used transmission electron microscopy (TEM), X-ray powder diffraction (XRD), vibrating-sample magnetometry (VSM), and Fourier-transform infrared spectroscopy (FTIR), for characterization of properties and structure of the nanoparticles. An immobilization of protein A on magnetic nanoparticles was studied with a UV-Vis spectrum (UV-Vis) and fluorescence electron microscopy and Bradford method. Results showed that an XRD spectrum with a peak at (311) corresponded to the standard peak of magnetic nanoparticles. In addition, the magnetic nanoparticles with d≥30 nm have higher saturation magnetizations in comparison with the smaller ones with d≤10 nm. However, the smaller magnetic nanoparticles offered higher efficiency for binding of protein A, due to the high surface/volume ratio. These particles with functional groups on their surface are promising candidates for biomedical applications, e.g., drug delivery, controlled drug release, or disease diagnosis in point-of-care test.

scholarly journals Comparative Electrocatalytic Oxygen Evolution Reaction Studies of Spinel NiFe2O4 and Its Nanocarbon Hybrids

2021 ◽  
Author(s):  
Pratik V. Shinde ◽  
Rutuparna Samal ◽  
Chandra Sekhar Rout
Keyword(s):  
Graphene Oxide ◽  
Oxygen Evolution ◽  
Current Density ◽  
Transition Metal Oxides ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
A Current

AbstractElectrocatalytic oxygen evolution reaction (OER) is one of the crucial reactions for converting renewable electricity into chemical fuel in the form of hydrogen. To date, there is still a challenge in designing ideal cost-effective OER catalysts with excellent activity and robust durability. The hybridization of transition metal oxides and carbonaceous materials is one of the most effective and promising strategies to develop high-performance electrocatalysts. Herein, this work synthesized hybrids of NiFe2O4 spinel materials with two-dimensional (2D) graphene oxide and one-dimensional (1D) carbon nanotubes using a facile solvothermal approach. Electrocatalytic activities of NiFe2O4 with 2D graphene oxide toward OER were realized to be superior even to the 1D carbon nanotube-based electrocatalyst in terms of overpotential to reach a current density of 10 mA/cm2 as well as Tafel slopes. The NiFe2O4 with 2D graphene oxide hybrid exhibits good stability with an overpotential of 327 mV at a current density of 10 mA/cm2 and a Tafel slope of 103 mV/dec. The high performance of NiFe2O4 with 2D graphene oxide is mainly attributed to its unique morphology, more exposed active sites, and a porous structure with a high surface area. Thus, an approach of hybridizing a metal oxide with a carbonaceous material offers an attractive platform for developing an efficient electrocatalyst for water electrochemistry applications.

Applicability of Ferromagnetic Nanoparticles in the Retention of Heavy Metals from Aqueous Solutions

2017 ◽  
Vol 68 (6) ◽  
pp. 1320-1324
Author(s):  
Dumitra Daniela Clej (Slave) ◽  
Ioana Lavinia Ardelean ◽  
Gheorghe Nechifor
Keyword(s):  
Experimental Data ◽  
Heavy Metals ◽  
Magnetic Nanoparticles ◽  
Water Treatment ◽  
Aqueous Solutions ◽  
Ferromagnetic Nanoparticles ◽  
Acrylic Polymer ◽  
Iron Cobalt ◽  
Cadmium And Lead ◽  
Cobalt And Nickel

In this paper are presented the experimental results obtained in the study of applicability of ferromagnetic nanoparticles in the retention of heavy metals from aqueous solutions. The influence of magnetic nanoparticles based on iron, cobalt and nickel on turbidity, pH, permanganate index, aluminum, copper, cadmium and lead was studied. The study shows that conventional water treatment systems combined with acrylic polymer can be improved by adding magnetic nanoparticles. Experimental data has shown that the presence of magnetic nanoparticles based on iron, cobalt and/or nickel increases the efficiency of the treatment system and is reflected by all analyzed parameters.

Performance Analysis of an Ultrahigh Performance, 3-D Micro Convective Heat Sink With a Nearly Fractal Plumbing System

Volume 4 ◽  
2004 ◽  
Author(s):  
R. Moreno ◽  
Y.-X. Tao
Keyword(s):  
Convective Heat ◽  
Heat Sink ◽  
High Performance ◽  
Silver Film ◽  
High Surface ◽  
Tape Casting ◽  
Volume Ratio ◽  
Pumping Power ◽  
Flow And Heat Transfer ◽  
Point To Point

This paper presents the design and CFD analysis of a 3-D, active micro convective heat sink having high surface-to-volume ratio geometry. The heat sink consists of an array of elemental units arranged in parallel. Each unit is constructed as a network of nearly fractal geometry. The design of each unit uses the constructal method to minimize the point-to-point temperature difference within the heat sink and Murray’s Law to minimize pressure drop across the device. The heat sink is designed for the tape casting fabrication method using thick silver film techniques and co–fired with low temperature co-fired ceramic substrate. To analyze fluid flow and heat transfer characteristics of the design, we use the Fluent CFD software. The numerical results are presented to validate the theoretical optimization and outline the ultra-high performance characteristics of the heat sink such as the overall thermal resistance, pumping power and effectiveness.

Sign in / Sign up

Export Citation Format

Share Document