Purchase Solution

Surface Acidity and Fluorine-Doping

Not what you're looking for?

Ask Custom Question

In the attached paper, the authors claim that F-doping enhanced surface acidity. Why does the presence of fluorine increase surface acidity?

Reference:
Li, D., Haneda, H., Hishita, S., Ohashi, N., & Labhsetwar, N. K. (2005). Fluorine-doped TiO< sub> 2</sub> powders prepared by spray pyrolysis and their improved photocatalytic activity for decomposition of gas-phase acetaldehyde. Journal of Fluorine Chemistry, 126(1), 69-77.

Purchase this Solution

Solution Summary

The solution offers succinct answer and clear explanation along with three relevant references, which helps the student to conceptualize better.

Solution Preview

Surface Acidity and Fluorine
In the attached paper, the authors claim that F-doping enhanced surface acidity. Why does the presence of fluorine increase surface acidity?

************

Fluorine incorporation into TiO2 causes replacement of surface or lattice O and OH groups by F, which increases the acidity of Bronsted and Lewis acid sites on the surface, due to stronger electronegativity and polarizing effect of fluorine [1]. By ...

Solution provided by:
Education
  • BSc (Hons),
  • MSc,
  • PhD,
Recent Feedback
  • "Thankyou for the feedback. I have a few question though; With the first statistic about cost below... “According to Sigma-Aldrich catalog, cost of 1L octane is AUD $ 392.00, whereas the cost of 1L ethanol is AUD $196.00. Moreover, if ethanol is obtained from sugar industry as a by-product, it may cost even less. Source of oxygen is ambient atmosphere, so it costs nothing. So ethanol is much cheaper than petrol, in fact it is half-priced: AUD $ (392-196) = $ 196.” I didn't think it made sense because the cost of petrol per litre is normally a dollar something or even less than a dollar not a couple of hundred of dollars. For example, a statistic that I found in america was: "U.S. ethanol production costs are about $1.20 per gallon of ethanol, or $1.82 per gallon on a gasoline-equivalent basis." However, I was wondering whether you could find an Australian statistic. Also, you mentioned that H20 is not a greenhouse gas. However, in the combustion equations it is actually carbon dioxide and water vapour which are produced and they are both greenhouse gases. Finally, how do I calculate the energy efficiency of ethanol and petrol? "
  • "Thank you!"
  • "Didnt really answer my questions but gave me a start at least."
  • "Once again this is tremendous help I can't thank you enough for not only working the problem but explaining in detail how and why!! KR"
  • "Awesome thank you so much for the help!!!"
Purchase this Solution


Free BrainMass Quizzes
Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.

Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.