scholarly journals Magnetic Ni-Doped TiO2 Photocatalysts for Disinfection of Escherichia coli Bacteria

2021 ◽  
Author(s):  
Khang Cao Nguyen ◽  
Nghia Manh Nguyen ◽  
Van Quoc Duong ◽  
Khanh Van Nguyen ◽  
Hung Manh Nguyen ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Tio2 Photocatalysts ◽  
Doped Tio2 ◽  
Escherichia Coli Bacteria

scholarly journals Modified-TiO2 Photocatalyst Supported on β-SiC Foams for the Elimination of Gaseous Diethyl Sulfide as an Analog for Chemical Warfare Agent: Towards the Development of a Photoreactor Prototype

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 403
Author(s):  
Armelle Sengele ◽  
Didier Robert ◽  
Nicolas Keller ◽  
Valérie Keller
Keyword(s):  
Photocatalytic Oxidation ◽  
Chemical Warfare Agents ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Diethyl Sulfide ◽  
Tio2 Photocatalysts ◽  
Doped Tio2 ◽  
Model Molecule ◽  
Warfare Agents ◽  
Oxidation Efficiency

In the context of the increase in chemical threat due to warfare agents, the development of efficient methods for destruction of Chemical Warfare Agents (CWAs) are of first importance both for civilian and military purposes. Amongst possible methods for destruction of CWAs, photocatalytic oxidation is an alternative one. The present paper reports on the preparation of Ta and Sn doped TiO2 photocatalysts immobilized on β-SiC foams for the elimination of diethyl sulfide (DES) used as a model molecule mimicking Yperite (Mustard Gas) in gaseous phase. Photo-oxidation efficiency of doped TiO2 catalyst has been compared with TiO2-P25. Here, we demonstrate that the Sn doped-TiO2 with a Polyethylene glycol (PEG)/TiO2 ratio of 7 exhibits the best initial activity (up to 90%) but is deactivates more quickly than Ta doped-TiO2 (40% after 800 min). The activity of the catalysts is strongly influenced by the adsorption properties of the support, as β-SiC foams adsorb DES and other sulfur compounds. This adsorption makes it possible to limit the poisoning of the catalysts and to maintain an acceptable conversion rate even after ten hours under continuous DES flow. Washing with NaOH completely regenerates the catalyst after a firs treatment and even seems to “wash” it by removing impurities initially present on the foams.

The influence of the local structure of Fe(III) on the photocatalytic activity of doped TiO2 photocatalysts—An EXAFS, XPS and Mössbauer spectroscopic study

2011 ◽  
Vol 103 (1-2) ◽  
pp. 232-239 ◽  
Author(s):  
Éva G. Bajnóczi ◽  
Nándor Balázs ◽  
Károly Mogyorósi ◽  
Dávid F. Srankó ◽  
Zsolt Pap ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Spectroscopic Study ◽  
Local Structure ◽  
Tio2 Photocatalysts ◽  
Doped Tio2

scholarly journals C-,N- and S-Doped TiO2 Photocatalysts: A Review

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 144
Author(s):  
Aleksandra Piątkowska ◽  
Magdalena Janus ◽  
Kacper Szymański ◽  
Sylwia Mozia
Keyword(s):  
Carbon Dioxide Reduction ◽  
Air Purification ◽  
Lithium Storage ◽  
Tio2 Photocatalysts ◽  
Doped Tio2 ◽  
Preparation Conditions ◽  
Production Of Hydrogen ◽  
Methods Of Synthesis ◽  
Metal Doped ◽  
Inactivation Of Bacteria

This article presents an overview of the reports on the doping of TiO2 with carbon, nitrogen, and sulfur, including single, co-, and tri-doping. A comparison of the properties of the photocatalysts synthesized from various precursors of TiO2 and C, N, or S dopants is summarized. Selected methods of synthesis of the non-metal doped TiO2 are also described. Furthermore, the influence of the preparation conditions on the doping mode (interstitial or substitutional) with reference to various types of the modified TiO2 is summarized. The mechanisms of photocatalysis for the different modes of the non-metal doping are also discussed. Moreover, selected applications of the non-metal doped TiO2 photocatalysts are shown, including the removal of organic compounds from water/wastewater, air purification, production of hydrogen, lithium storage, inactivation of bacteria, or carbon dioxide reduction.

scholarly journals Application of S-doped TiO2 photocatalysts in degradation of BTEX from synthetic surfaces

2020 ◽  
Vol 892 ◽  
pp. 012014
Author(s):  
Ronghui Yuan ◽  
Tinghua Wu ◽  
Tianyi Hu ◽  
Li Shi ◽  
Jing Shi
Keyword(s):  
Tio2 Photocatalysts ◽  
Doped Tio2

scholarly journals Uji Bioaktivitas Antibakteri Senyawa murni dari Jamur Endofit Sporothrix sp Terhadap Bakteri Escherichia coli dan Staphylococcus aureus

2019 ◽  
Vol 6 (1) ◽  
pp. 37
Author(s):  
Dewi Yudiana Shinta ◽  
Yusmarini Yusmarini ◽  
Herix Sonata MS ◽  
Hilwan Yuda Teruna ◽  
Saryono Saryono
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Endophytic Fungi ◽  
Positive Control ◽  
Significant Inhibition ◽  
New Drugs ◽  
Diffusion Method ◽  
Significant Difference ◽  
Pure Compounds ◽  
Escherichia Coli Bacteria

Modern medicines that are developing now come from active ingredients isolated from plants that require large amounts of plants. The development of new drugs from endophytic fungi found obstacles in the amount of pure compounds produced. Therefore further research is needed by using endophytic fungi as a new antimicrobial producer. This study aims to see the ability or activity of pure compounds produced by Sporothrix sp endophytic fungi from Dahlia tuber (Dahlia variabilis). Test the activity of pure compounds produced by Sporothrix sp. Endophytic fungi on E. coli and Staphylococcus aureus determined by disc diffusion method. With doses of 10, 30 and 50μg/disk. In Escherichia coli bacteria doses 10 and 50μg/disk gave significant inhibition of pure compounds from isolation compared to the positive control of ciprofloxacin, which was marked by a statistically significant test result (p <0.05). In contrast to Staphylococcus aureus there was no significant difference in doses of both doses of 10.30 and 50μg/disk. Determination of pure compounds was carried out by HPLC and Infra Red Spectrophotometry.

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