Phenol Degradation on Glass Fibres with Immobilized Titanium Dioxide Particles

1995 ◽  
Vol 60 (5) ◽  
pp. 788-794 ◽  
Author(s):  
Vlasta Brezová ◽  
Alžbeta Blažková ◽  
Mirko Brezňan ◽  
Peter Kottáš ◽  
Michal Čeppan
Keyword(s):  
Titanium Dioxide ◽  
Aqueous Solutions ◽  
Phenol Degradation ◽  
Experimental Conditions ◽  
Glass Fibres

The photocatalytic mineralization of phenol in aqueous solutions under various experimental conditions was employed, to test the activity of the prepared immobilized fibreglass/TiO2 photocatalysts. The particles of titanium dioxide P25 were coated on the surface of commercial fibreglass fabric by dipping in ethanolic TiO2 suspensions and were fixed by firing 6 h at 500 °C.

Comparison of Photocatalytic Activities of Commercial Titanium Dioxide Powders Immobilised on Glass Substrates

2010 ◽  
Vol 13 (1) ◽  
Author(s):  
Patrick S. M. Dunlop ◽  
Americo Galdi ◽  
Trudy A. McMurray ◽  
Jeremy W. J. Hamilton ◽  
Luigi Rizzo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Formic Acid ◽  
Parent Compound ◽  
Phenol Degradation ◽  
Spray Coating ◽  
Dip Coating ◽  
Catalyst Loading ◽  
Experimental Conditions ◽  
Wide Range

AbstractSemiconductor photocatalysis is an advanced oxidation technology reported to be effective for the degradation of a wide range of organic pollutants found in water. Titanium dioxide is the most suitable photocatalyst for water treatment as it is insoluble under normal pH conditions, is photoactive, photostable, readily available and inexpensive. In this work Millennium Chemicals PC500, PC105, PC100, PC50, PC10 and Evonik Degussa P25 powders were immobilised onto borosilicate glass, via dip-coating and spray coating, producing thick films ranging from 0.2 to 1.4 mg catalyst per square cm of glass substrate. The photocatalytic activity of the immobilised films was compared under back-face UVA irradiation in a stirred-tank reactor using formic acid and phenol as model pollutants. Based upon the rate constant derived from the removal of the parent compound, and using the optimum catalyst loading determined under the experimental conditions employed, the order of photocatalytic activity for the degradation of formic acid was found to be P25 > PC100 > PC50 > PC105 ≥ PC500 > PC10, while for phenol degradation the order was P25 > PC50 > PC105 > PC100 ≥ PC500 > PC10.

scholarly journals Effective replacement of cetyltrimethylammonium bromide (CTAB) by mercaptoalkanoic acids on gold nanorod (AuNR) surfaces in aqueous solutions

Nanoscale ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 658-668 ◽  
Author(s):  
Rafael del Caño ◽  
Jose M. Gisbert-González ◽  
Jose González-Rodríguez ◽  
Guadalupe Sánchez-Obrero ◽  
Rafael Madueño ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Gold Nanorods ◽  
Ligand Exchange ◽  
Cetyltrimethylammonium Bromide ◽  
Gold Nanorod ◽  
Experimental Conditions ◽  
Seed Mediated ◽  
The Stability

The highly packed cetyltrimethylammonium bromide bilayer on the surface of gold nanorods synthesized by the seed-mediated procedure hampers the complete ligand exchange under experimental conditions that preserves the stability of the dispersions.

scholarly journals Investigations of ternary complexes of Co(II) and Ni(II) with thiodiacetate anion and 1,10-phenanthroline or 2,2’-bipyridine in aqueous solutions

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Dariusz Wyrzykowski ◽  
Joanna Pranczk ◽  
Dagmara Jacewicz ◽  
Aleksandra Tesmar ◽  
Bogusław Pilarski ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Substitution Reactions ◽  
Experimental Conditions ◽  
Kinetic Measurements ◽  
Hydroxo Complexes ◽  
Binary Complexes ◽  
Vis Spectroscopy ◽  
Potentiometric Titration Method ◽  
The Stability ◽  
Ph Range

AbstractA potentiometric titration method (PT) and a stopped-flow kinetic technique monitored by a UV−Vis spectroscopy have been used to characterize the stability of series of Co(II)- and Ni(II)-thiodiacetato complexes, M(TDA), in the presence of 1,10-phenanthroline (phen) or 2,2’-bipyridine (bipy) in aqueous solutions. The stability constants of the binary (1:1), ternary (1:1:1) as well as the resulting hydroxo complexes were evaluated and compared to the corresponding oxydiacetate complexes. Based on the species distribution as a function of pH the relative predominance of the species in the system over a pH range was discussed. Furthermore, the kinetic measurements of the substitution reactions of the aqua ligands to phen or bipy in the coordination sphere of the binary complexes M(TDA) were performed in the 288–303 K temperature range, at a constant concentration of phen or bipy and at seven different concentrations of the binary complexes (0.2–0.5 mM). The kinetic stability of the M(TDA) complexes was discussed in relation to the experimental conditions and the kind of the auxiliary ligands (phen/bipy). Moreover, the influence of the type of primary ligand (thiodiacetate/oxydiacetate) on the substitution rate of the auxiliary ligands was also compared.

scholarly journals The influence of temperature on the absorption of water by seeds of hordeum vulgare in relation to the temperature coefficient of chemical change

1912 ◽  
Vol 85 (582) ◽  
pp. 546-553 ◽  
Keyword(s):  
Hordeum Vulgare ◽  
Aqueous Solutions ◽  
Temperature Coefficient ◽  
Chemical Change ◽  
Experimental Conditions ◽  
Influence Of Temperature ◽  
Suitable Medium ◽  
Influence Of Temperature On

Attention has previously been directed by one of us to the existence of a differential septum enclosing the seeds of Hordeum (barley). When the seeds are immersed in aqueous solutions of most electrolytes, and of many non-electrolytes, this covering behaves as a very efficient differential septum, water alone entering the seeds under the attractive influence of the finely granulated contents. The rate at which the water enters is considerably affected if substances are dissolved in it, being increased by some and diminished by others; it is also markedly dependent on the temperature of the water or solution in which the seeds are immersed. Variations of the rate at which water enters with alterations of the experimental conditions are presumably due mainly to changes in the water, and the seeds of Hordeum would thus appear to be a very suitable medium for the investigation of the nature of the changes produced in water by the presence of dissolved substances or by alterations of temperature.

Removal of naphthalene from aqueous solutions by phosphorus doped-titanium dioxide coated on silica phosphoric acid under visible light

2021 ◽  
Vol 224 ◽  
pp. 187-196
Author(s):  
Bahman Banaei ◽  
Amir Hessam Hassani ◽  
Farhang Tirgir ◽  
Abdolmajid Fadaei ◽  
Seyed Mehdi Borghaei
Keyword(s):  
Titanium Dioxide ◽  
Phosphoric Acid ◽  
Aqueous Solutions ◽  
Visible Light ◽  
Doped Titanium Dioxide ◽  
Phosphorus Doped

Equilibrium studies of yttrium adsorption from aqueous solutions by titanium dioxide

2020 ◽  
pp. 109473
Author(s):  
Hanna Vasylyeva ◽  
Ivan Mironyuk ◽  
Igor Mykytyn ◽  
Khrystyna Savka
Keyword(s):  
Titanium Dioxide ◽  
Aqueous Solutions ◽  
Equilibrium Studies

α-MnO2 activation of peroxymonosulfate for catalytic phenol degradation in aqueous solutions

2012 ◽  
Vol 26 ◽  
pp. 144-148 ◽  
Author(s):  
Edy Saputra ◽  
Syaifullah Muhammad ◽  
Hongqi Sun ◽  
Archana Patel ◽  
Pradeep Shukla ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Phenol Degradation

Pyrophosphate effect on the photocatalytic degradation of phenol over bare and Pt-deposited Bi2WO6

2018 ◽  
Vol 42 (23) ◽  
pp. 18873-18880 ◽  
Author(s):  
Jie Meng ◽  
Jianjun Zhao ◽  
Xianqiang Xiong ◽  
Xiao Zhang ◽  
Yiming Xu
Keyword(s):  
Aqueous Solutions ◽  
Photocatalytic Degradation ◽  
Phenol Degradation ◽  
Hole Transfer

Pyrophosphate-mediated hole transfer from Pt/Bi2WO6to phenol can accelerate phenol degradation in aqueous solutions.

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