An aqueous, organic dye derivatized SnO2/TiO2 core/shell photoanode

2016 ◽  
Vol 4 (8) ◽  
pp. 2969-2975 ◽  
Author(s):  
Kyung-Ryang Wee ◽  
Benjamin D. Sherman ◽  
M. Kyle Brennaman ◽  
Matthew V. Sheridan ◽  
Animesh Nayak ◽  
...  
Keyword(s):  
Water Splitting ◽  
Phosphonic Acid ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Organic Dye ◽  
Photoelectrochemical Cell ◽  
Core Shell ◽  
Buffer Solution ◽  
Dye Sensitized ◽  
Visible Light Driven

Visible light driven water splitting in a dye-sensitized photoelectrochemical cell (DSPEC) based on a phosphonic acid-derivatized donor–π–acceptor (D–π–A) organic dye (P–A–π–D) is described with the dye anchored to an FTO|SnO2/TiO2 core/shell photoanode in a pH 7 phosphate buffer solution.

Organic Dye-Sensitized Tandem Photoelectrochemical Cell for Light Driven Total Water Splitting

2015 ◽  
Vol 137 (28) ◽  
pp. 9153-9159 ◽  
Author(s):  
Fusheng Li ◽  
Ke Fan ◽  
Bo Xu ◽  
Erik Gabrielsson ◽  
Quentin Daniel ◽  
...  
Keyword(s):  
Water Splitting ◽  
Organic Dye ◽  
Photoelectrochemical Cell ◽  
Total Water ◽  
Dye Sensitized

scholarly journals Halogenated earth abundant metalloporphyrins as photostable sensitizers for visible-light-driven water oxidation in a neutral phosphate buffer solution

2016 ◽  
Vol 18 (22) ◽  
pp. 15191-15198 ◽  
Author(s):  
Hung-Cheng Chen ◽  
Joost N. H. Reek ◽  
René M. Williams ◽  
Albert M. Brouwer
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Oxidation Catalysts ◽  
Buffer Solution ◽  
Earth Abundant ◽  
Visible Light Driven

Chlorinated porphyrins containing earth abundant Cu(ii) and Ni(ii) are powerful and photostable photosensitizers for water oxidation catalysts.

scholarly journals Platinum(ii)–porphyrin as a sensitizer for visible-light driven water oxidation in neutral phosphate buffer

2015 ◽  
Vol 8 (3) ◽  
pp. 975-982 ◽  
Author(s):  
Hung-Cheng Chen ◽  
Dennis G. H. Hetterscheid ◽  
René M. Williams ◽  
Jarl Ivar van der Vlugt ◽  
Joost N. H. Reek ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
High Potential ◽  
Water Soluble ◽  
Buffer Solution ◽  
Visible Light Driven

A water-soluble Pt(ii)–porphyrin with a high potential for one-electron oxidation (∼1.42 V vs. NHE) proves very suitable for visible-light driven water oxidation in neutral phosphate buffer solution in combination with a variety of WOCs.

Bioceramic Hydroxyapatite Granules for Purification of Biotechnological Products

2011 ◽  
Vol 284-286 ◽  
pp. 1764-1769 ◽  
Author(s):  
Vitalijs Lakevics ◽  
Janis Locs ◽  
Dagnija Loca ◽  
Valentina Stepanova ◽  
Liga Berzina-Cimdina ◽  
...  
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Phosphate Buffer ◽  
Bovine Serum ◽  
Phosphate Buffer Solution ◽  
Sorption Process ◽  
Buffer Solution ◽  
Ph Values ◽  
Bovine Serum Albumin Adsorption ◽  
Albumin Adsorption

Sorption experiments of bovine serum albumin (BSA) on hydroxyapatite (HAp) ceramic granules, prepared at three temperatures 900°C, 1000°C and 1150°C were performed at room temperature 18,6 °C and phosphate buffer, pH 5,83; 6.38 and 7,39. Thermal treatment contributed to the decrease of bovine serum albumin immobilization indicating that sorption process depended on HAp ceramics specific surface area and pH values of phosphate buffer solution. However, it was confirmed that granule size was also an important parameter for bovine serum albumin adsorption. As a result of these experiments, the most appropriate adsorption conditions and phosphate buffer pH values influence on to BSA sorption were analyzed.

Electron transfer kinetics in water splitting dye-sensitized solar cells based on core–shell oxide electrodes

2012 ◽  
Vol 155 ◽  
pp. 165-176 ◽  
Author(s):  
Seung-Hyun Anna Lee ◽  
Yixin Zhao ◽  
Emil A. Hernandez-Pagan ◽  
Landy Blasdel ◽  
W. Justin Youngblood ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Solar Cells ◽  
Water Splitting ◽  
Dye Sensitized Solar Cells ◽  
Core Shell ◽  
Electron Transfer Kinetics ◽  
Dye Sensitized ◽  
Oxide Electrodes ◽  
Sensitized Solar Cells

Reduction of Escherichia coli O157:H7 Counts on Whole Fresh Apples by Treatment with Sanitizers

2000 ◽  
Vol 63 (6) ◽  
pp. 703-708 ◽  
Author(s):  
MARCY A. WISNIEWSKY ◽  
BONITA A. GLATZ ◽  
MARK L. GLEASON ◽  
CHERYLL A. REITMEIER
Keyword(s):  
Escherichia Coli ◽  
Chlorine Dioxide ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Escherichia Coli O157 ◽  
Peroxyacetic Acid ◽  
Water Control ◽  
Buffer Solution ◽  
E Coli ◽  
Log Reduction

The objectives of this study were to determine if washing of whole apples with solutions of three different sanitizers (peroxyacetic acid, chlorine dioxide, or a chlorine-phosphate buffer solution) could reduce a contaminating nonpathogenic Escherichia coli O157:H7 population by 5 logs and at what sanitizer concentration and wash time such a reduction could be achieved. Sanitizers were tested at 1, 2, 4, 8, and 16 times the manufacturer's recommended concentration at wash times of 5, 10, and 15 min. Whole, sound Braeburn apples were inoculated with approximately 1 × 108 or 7 × 106 CFU per apple, stored for 24 h, then washed with sterile water (control) or with sanitizers for the prescribed time. Recovered bacteria were enumerated on trypticase soy agar. Washing with water alone reduced the recoverable population by almost 2 logs from the starting population; this can be attributed to physical removal of organisms from the apple surface. No sanitizer, when used at the recommended concentration, reduced the recovered E. coli population by 5 logs under the test conditions. The most effective sanitizer, peroxyacetic acid, achieved a 5-log reduction when used at 2.1 to 14 times its recommended concentration, depending on the length of the wash time. The chlorine-phosphate buffer solution reduced the population by 5 logs when used at 3 to 15 times its recommended concentration, depending on wash time. At no concentration or wash time tested did chlorine dioxide achieve the 5-log reduction.

Electrocatalytic performance of a zinc sulphide nanoparticles-modified carbon paste electrode for the simultaneous determination of acetaminophen, guanine and adenine

2018 ◽  
Vol 10 (11) ◽  
pp. 1362-1371 ◽  
Author(s):  
Mallappa Mahanthappa ◽  
Nagaraju Kottam ◽  
Shivaraj Yellappa
Keyword(s):  
Carbon Paste Electrode ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Zinc Sulphide ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Buffer Solution ◽  
Guanine And Adenine ◽  
Paste Electrode

The simultaneous electroanalysis of acetaminophen (AC), guanine (G) and adenine (A) was successfully achieved on the zinc sulphide nanoparticles-modified carbon paste electrode (ZnS NPs/CPE) in phosphate buffer solution (PBS).

Microfluidic concentration enhancement of bio-analyte by temperature gradient focusing via Joule heating by DC plus AC field: A numerical approach

2021 ◽  
pp. 1-17
Author(s):  
Amitava Dutta ◽  
Apurba Kumar Santra ◽  
Ranjan Ganguly
Keyword(s):  
Temperature Gradient ◽  
Joule Heating ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Numerical Approach ◽  
High Concentration ◽  
Buffer Solution ◽  
Temperature Gradient Focusing ◽  
Ac Field ◽  
Target Analyte

Abstract We present a detailed numerical analysis of electrophoresis induced concentration of a bio-analyte facilitated by temperature gradient focusing in a phosphate buffer solution via Joule heating inside a converging-diverging microchannel. The purpose is to study the effects of frequency of AC field and channel width variation on the concentration of target analyte. We tune the buffer viscosity, conductivity and electrophoretic mobility of the analyte such that the electrophoretic velocity of the analyte locally balances the electroosmotic flow of the buffer, resulting in a local build-up of the analyte concentration in a target region. An AC field is superimposed on the applied DC field within the microchannel in such a way that the back pressure effect is minimized, resulting in minimum dispersion and high concentration of the target analyte. Axial transport of fluorescein-Na in the phosphate buffer solution is controlled by inducing temperature gradient through Joule heating. The technique leverages the fact that the buffer's ionic strength and viscosity depends on temperature, which in turn guides the analyte transport. A numerical model is proposed and a finite element-based solution of the coupled electric field, mass, momentum, energy and species equations are carried out. Simulation predict peak of 670-fold concentration of fluorescein-Na is achieved. The peak concentration is found to increase sharply as the channel throat width, while the axial spread of concentrated analyte increases at lower frequency of AC field. The results of the work may improve the design of micro concentrator.

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