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The Inside Line - What We Do
The Inside Line are a specialist PR and marketing consultancy who work with some very well known global brands
On what we know and what we don’t know about the photocatalytic conversion of...
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Reduction of carbon dioxide into value added fuels and chemicals has been an interested field of research both in terms of energy as well as in environmental point of view. In photocatalytic reduction, in principle, the material harnesses the natural sun and atmospheric carbon dioxide in a sustainable pathway and convert it into chemicals and fuels, which requires a series of electron and proton transfer reactions, a style similar to the natural photosynthesis. Only the fruition of the technology, even in research laboratory scale is still a challenge due to the ‘n’ number of hurdles associated with the procedure. The mechanistic aspects are yet not readable or the current knowledge is not sufficient to explain the exact reaction mechanism. Amazingly, no arguments or controversies going on these issues among the scientific community. Out of all ‘n’ number of hurdles, here we are debating the mystery behind the mechanistic aspects of CO2 reduction. Light Water Hydrogen and Carbon Dioxide
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The Inside Line - What We Do
The Inside Line are a specialist PR and marketing consultancy who work with some very well known global brands
On what we know and what we don’t know about the photocatalytic conversion of...
On what we know and what we don’t know about the photocatalytic conversion of...Hariprasad Narayanan
Reduction of carbon dioxide into value added fuels and chemicals has been an interested field of research both in terms of energy as well as in environmental point of view. In photocatalytic reduction, in principle, the material harnesses the natural sun and atmospheric carbon dioxide in a sustainable pathway and convert it into chemicals and fuels, which requires a series of electron and proton transfer reactions, a style similar to the natural photosynthesis. Only the fruition of the technology, even in research laboratory scale is still a challenge due to the ‘n’ number of hurdles associated with the procedure. The mechanistic aspects are yet not readable or the current knowledge is not sufficient to explain the exact reaction mechanism. Amazingly, no arguments or controversies going on these issues among the scientific community. Out of all ‘n’ number of hurdles, here we are debating the mystery behind the mechanistic aspects of CO2 reduction. Light Water Hydrogen and Carbon Dioxide
Its a short lecture about attaining sustainability through four factors light, water,hydrogen and carbon dioxide.
Sunlight induced removal of Rhodamine B from water through Semiconductor Pho...
Application of Advanced Oxidation Processes (AOP) for the removal of toxic pollutants from water has been receiving increasing
attention in recent times. Photocatalysis using semiconductor oxides is one such AOP which is being investigated extensively for
the degradation of dyes in effluent water. This paper reports our findings on the sunlight induced photocatalytic removal of the
hazardous xanthene dye Rhodamine B from water, mediated by TiO2 and ‘platinum deposited TiO2’ (Pt/TiO2).Unlike in the case of
photocatalytic degradation of many organic pollutants which are driven by UV light, Rhodamine B can be removed in presence of
TiO2 even by visible light. Pt/TiO2 is ~5 times more active than TiO2 alone for the solar photocatalytic degradation of the dye,
which is attributed to extension of the absorption of light to the visible range and retardation of the recombination of
photogenerated electrons and holes. The dye itself can absorb visible light and act as a photo sensitizer to activate TiO2. The
effects of various parameters such as catalyst loading, concentration of the dye, pH, Pt concentration in Pt/TiO2, externallyadded
H2O2 etc on the adsorption and /or degradation of the dye are evaluated. The degradation of the dye proceeds through
intermediates and complete removal of Total Organic Carbon (TOC) is achieved many hours after the decolorisation of the dye.
The rate of degradation decreases beyond a critical concentration of the dye, possibly due to reduction in the path length of
photons in deeply colored solution. The higher degradation in alkaline pH is explained in terms of the ionization state of the
catalyst surface and the enhanced adsorption facilitated by the electrostatic attraction between the negatively charged catalyst
surface and the zwitter ionic form of the dye. H2O2, upto a critical concentration, accelerates the degradation. The observations are
critically analysed and suitable mechanism for the photocatalytic mineralisation of RhB is proposed.
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Most frequently cited article in the field of photocatalysis is by Fujishima and Honda published in 1972 in nature and it has been cited by the photocatalytic community as an origin of photocatalysis. This aspect is not true at all. This article cannot be the origin of photocatalysis. This article only promoted photocatalytic studies. The author itself, actually, started a research career in the “boom” of photocatalytic studies initiated by this article.
This small presentation aims to deliver some misconceptions like above in photocatalysis. The entire presentation is based on different personal commentaries written by Jean Mary Hermann and Bunsho Ohtani. Some recent articles relevant to the topic are collected by the speaker itself and put it in one platform.
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Destaque
Sunlight induced removal of Rhodamine B from water through Semiconductor Pho...
Application of Advanced Oxidation Processes (AOP) for the removal of toxic pollutants from water has been receiving increasing
attention in recent times. Photocatalysis using semiconductor oxides is one such AOP which is being investigated extensively for
the degradation of dyes in effluent water. This paper reports our findings on the sunlight induced photocatalytic removal of the
hazardous xanthene dye Rhodamine B from water, mediated by TiO2 and ‘platinum deposited TiO2’ (Pt/TiO2).Unlike in the case of
photocatalytic degradation of many organic pollutants which are driven by UV light, Rhodamine B can be removed in presence of
TiO2 even by visible light. Pt/TiO2 is ~5 times more active than TiO2 alone for the solar photocatalytic degradation of the dye,
which is attributed to extension of the absorption of light to the visible range and retardation of the recombination of
photogenerated electrons and holes. The dye itself can absorb visible light and act as a photo sensitizer to activate TiO2. The
effects of various parameters such as catalyst loading, concentration of the dye, pH, Pt concentration in Pt/TiO2, externallyadded
H2O2 etc on the adsorption and /or degradation of the dye are evaluated. The degradation of the dye proceeds through
intermediates and complete removal of Total Organic Carbon (TOC) is achieved many hours after the decolorisation of the dye.
The rate of degradation decreases beyond a critical concentration of the dye, possibly due to reduction in the path length of
photons in deeply colored solution. The higher degradation in alkaline pH is explained in terms of the ionization state of the
catalyst surface and the enhanced adsorption facilitated by the electrostatic attraction between the negatively charged catalyst
surface and the zwitter ionic form of the dye. H2O2, upto a critical concentration, accelerates the degradation. The observations are
critically analysed and suitable mechanism for the photocatalytic mineralisation of RhB is proposed.
Higher Dreams Productions and Online Video
Video will soon be 90% of all Internet traffic. Add video to your marketing mix.
Misconceptions in Photocatalysis
Photocatalysis has now become an emerging scientific discipline due to its interdisciplinary nature. The wide range of research groups is now working on different aspects of photocatalysis worldwide. It is one of the technology the world looking forward to address environmental as well as energy related issues. Hence we can call it as a technology for the future or a dream technology! We need to overcome too many hurdles to implement this technology in real life. Like any other discipline there is a lot of misunderstanding/ misconceptions in photocatalysis.
Most frequently cited article in the field of photocatalysis is by Fujishima and Honda published in 1972 in nature and it has been cited by the photocatalytic community as an origin of photocatalysis. This aspect is not true at all. This article cannot be the origin of photocatalysis. This article only promoted photocatalytic studies. The author itself, actually, started a research career in the “boom” of photocatalytic studies initiated by this article.
This small presentation aims to deliver some misconceptions like above in photocatalysis. The entire presentation is based on different personal commentaries written by Jean Mary Hermann and Bunsho Ohtani. Some recent articles relevant to the topic are collected by the speaker itself and put it in one platform.
Carbon Dioxide Capture Technology
Assignment Submitted to NCCR, IIT Madras as a part of the online course Carbon Dioxide to chemicals and fuels.
CO2 to fuels and chemicals course material final version
Carbon Dioxide to Chemicals and Fuels Course Material.
National Centre for Catalysis Research (NCCR, IIT Madras), considered for the first on-line course the topic of Carbon dioxide to Chemicals and Fuels. NCCR has learnt many such lessons which are necessary for the researchers to understand and also have a complete comprehension of the limitations.
Mémoire - L’influence des programmes de customisation proposés par les marques
L’objectif de cette recherche est d’étudier l’influence des programmes de customisation proposés par les marques, sur la relation du client à la marque et de mettre en exergue les manières d’agir des consommateurs.
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Actionnez les bons leviers du marketing
Destaque (10)
Sunlight induced removal of Rhodamine B from water through Semiconductor Pho...
Sunlight induced removal of Rhodamine B from water through Semiconductor Pho...
CO2 to fuels and chemicals course material final version
CO2 to fuels and chemicals course material final version
Mémoire - L’influence des programmes de customisation proposés par les marques
Mémoire - L’influence des programmes de customisation proposés par les marques
Le programme stratégique transversal communal (PST) - Une démarche stratégiqu...
Le programme stratégique transversal communal (PST) - Une démarche stratégiqu...
Dépassez la relation de prospection avec les Comités IT France
Dépassez la relation de prospection avec les Comités IT France