Periodate Titration of Fe(II) in Acid Aqueous Solutions: An Environmentally Friendly Redox Reaction for the Undergraduate Laboratory

1997 ◽  
Vol 2 (4) ◽  
pp. 1-7 ◽  
Author(s):  
THOMAS G. DRUMMOND ◽  
WILLIAM L. LOCKHART ◽  
SPENCER J. SLATTERY ◽  
FAROOQ A. KHAN ◽  
ANDREW J. LEAVITT
Keyword(s):  
Aqueous Solutions ◽  
Redox Reaction ◽  
Environmentally Friendly ◽  
Undergraduate Laboratory

Redox reaction mediated direct synthesis of hierarchical flower-like CuO spheres anchored on electrospun poly(vinylidene difluoride) fiber surfaces at low temperatures

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 100228-100234 ◽  
Author(s):  
Yun-Yang Lee ◽  
Hsieh-Yu Li ◽  
Shih-Jiuan Chiu ◽  
Wen-Li Liang ◽  
Pi-Li Yeh ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Rhodamine B ◽  
Redox Reaction ◽  
Low Temperatures ◽  
Direct Synthesis ◽  
Catalytic Membranes ◽  
Vinylidene Difluoride

Flower-like CuO spheres anchored on electrospun PVDF fiber surfaces as catalytic membranes for the photodegradation of rhodamine B aqueous solutions.

scholarly journals The Synthesis of Stable Platinum Nanoparticles in the Microreactor

2014 ◽  
Vol 59 (2) ◽  
pp. 509-512 ◽  
Author(s):  
M. Luty-Błocho ◽  
M. Wojnicki ◽  
J. Grzonka ◽  
K.J. Kurzydłowski
Keyword(s):  
Vitamin C ◽  
Platinum Nanoparticles ◽  
Redox Reaction ◽  
Batch Reactor ◽  
Environmentally Friendly ◽  
Biocompatible Polymers ◽  
Nucleation Stage ◽  
Alternative Method ◽  
Nanoparticles Synthesis ◽  
Platinum Recovery

Abstract In this work, the synthesis of the spherical clusters containing 3-4 nm platinum nanoparticles enclosed in a polymer capsule is described. The process of nanoparticles formation was intensified by using a microreactor. The application of microreactor enabled us to shorten the time of redox reaction and nucleation stage up to 6 seconds at 105°C in comparison with the process carried out in a batch reactor at 40°C. Using Vitamin C as a bio-reducer of platinum(IV) complexes and biocompatible polymers, the products non-toxic and environmentally friendly, stable for at least 9 months, were obtained. Presented procedure for nanoparticles synthesis seems to be an alternative method for platinum recovery from solutions containing platinum(IV) chloride complexions.

An environmentally friendly batch bioadsorption study of the radionuclides 67Ga from aqueous solutions by fibrous tea waste

2010 ◽  
Vol 165 (2) ◽  
pp. 563-572 ◽  
Author(s):  
Hayrettin Eroglu ◽  
Erhan Varoglu ◽  
Sinan Yapıcı ◽  
Ali Sahın
Keyword(s):  
Aqueous Solutions ◽  
Environmentally Friendly ◽  
Tea Waste

Redox Reaction of Quinones at a Silver-Deposited Gold Electrode in Acetonitrile and Aqueous Solutions

2002 ◽  
Vol 75 (7) ◽  
pp. 1539-1545
Author(s):  
Isao Ando ◽  
Hiroto Miyake ◽  
Kikujiro Ujimoto ◽  
Hirondo Kurihara
Keyword(s):  
Aqueous Solutions ◽  
Redox Reaction ◽  
Gold Electrode

scholarly journals Development of Environmentally Friendly Cellulose Derivative-Based Hydrogels for Contact Lenses Using a Radiation Crosslinking Technique

2021 ◽  
Vol 11 (19) ◽  
pp. 9168
Author(s):  
Akihiro Hiroki ◽  
Mitsumasa Taguchi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aqueous Solutions ◽  
Contact Lenses ◽  
Value Added ◽  
Environmentally Friendly ◽  
Soft Contact ◽  
Elongation At Break ◽  
Soft Contact Lenses ◽  
Polyethylene Glycol 1000

Although they have potential environmental pollution issues, soft contact lenses are value-added biodevices for medical use. Thus, it is important to reconsider starting materials and production methods to achieve sustainable development. In this study, hydrogels composed of hydroxypropyl cellulose (HPC) as an environmentally friendly material were produced by radiation and investigated for use in disposable soft contact lenses. HPC-based hydrogels with good mechanical properties and transparency were prepared by irradiation of electron beams on highly concentrated aqueous solutions containing HPC, polyethylene glycol #1000 dimethacrylate (23G), and 2-hydroxyethyl methacrylate (HEMA). The addition of 23G to HPC aqueous solutions resulted in an increase in the gel fraction as well as improved mechanical properties, such as tensile strength and elongation at break. The tensile strength and the elongation at break of HPC/HEMA/23G hydrogel obtained by the further addition of HEMA with HPC/23G aqueous solutions exhibited 0.2 MPa and 124%, which were approximately 2.0 and 1.8 times larger than these of the pure HPC hydrogel, respectively. The evaluation of the properties of the HPC/HEMA/23G hydrogel demonstrated its potential as a soft contact material with improved mechanical properties.

Synthesis of copper oxide nanowires and nanoporous copper via environmentally friendly transformation of bulk copper–calcium alloys

2018 ◽  
Vol 54 (43) ◽  
pp. 5446-5449
Author(s):  
X. Zhang ◽  
K. Turcheniuk ◽  
B. Zusmann ◽  
J. Benson ◽  
S. Nelson ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Copper Oxide ◽  
Environmentally Friendly ◽  
Oxide Nanowires ◽  
Nanoporous Copper ◽  
One Step ◽  
Cu Nanostructures

In this work, we report a novel, one-step, inexpensive and environmentally friendly synthesis of Cu nanostructures by means of chemical de-alloying of bulk Cu–Ca alloys in aqueous solutions.

scholarly journals Green Synthesis of Silver Nanoparticles using Lantana camara Fresh Leaf Extract for Qualitative Detection of Hg2+, Cu2+, Pb2+, and Mn2+ in Aqueous Solution

2021 ◽  
Vol 21 (4) ◽  
pp. 990
Author(s):  
Henry Fonda Aritonang ◽  
Talita Kojong ◽  
Harry Koleangan ◽  
Audy Denny Wuntu
Keyword(s):  
Silver Nanoparticles ◽  
Aqueous Solutions ◽  
Colorimetric Method ◽  
Environmentally Friendly ◽  
Ethanol Extract ◽  
Lantana Camara ◽  
Colloidal Synthesis ◽  
Distilled Water ◽  
Average Size ◽  
Almost All

This research was focused on the discovery of new environmentally friendly sensors based on nanoscale materials whose main purpose was to detect the presence of heavy metals in aqueous solutions. The environmentally friendly extracellular biosynthetic technique was applied to produce silver nanoparticles (AgNps). The reducing agents used were distilled water and ethanol extract obtained from fresh leaves of Lantana camara. The silver-containing extracts (Ag-extract) were then used to detect the presence of Hg2+, Cu2+, Pb2+, and Mn2+ in aqueous solutions by the colorimetric method using UV-visible spectroscopy. The colloidal synthesis of AgNPs was then monitored by the same method. The spectrum obtained showed peaks between 430 and 450 nm according to the Plasmon absorbance of AgNP. AgNPs' size and shape were characterized using the Transmission Electron Microscopy (TEM) technique, which showed the average size varies from 1.6 to 25 nm. The colorimetric data showed that Ag-extract, both of distilled water or ethanol solvents, was the best for detecting the presence of Hg2+ followed by Mn2+. On the other hand, Ag-extract in distilled water cannot detect Cu2+, Pb2+, and Mn2+ ions, while almost all Ag-extracts in ethanol solvents could identify the presence of these metals.

Sign in / Sign up

Export Citation Format

Share Document