TiO2 binder
After looking through some further videos of building dye solar cells to find out what might be used as a binder for the Titanium Dioxide, it seems that ethanol can be used. It is great to find that out as I already it and in general it is an easy to come by ingredient with little restrictions. Vinegar was also used here as a binder.
This video above shows the use of Nitric acid as a binder for the Titanium Dioxide. Hopefully I can find something a little more everyday and less noxious than Nitric acid.
These folks use ethanol and mention that propanol and dilute nitric acid can also be used. Ethanol is much more easy to come by and less noxious.
Titanium Dioxide is used as a whitener and is found in toothpaste, suncream and as a pigment for paints. However when it is in powder form precautions need to be take to ensure that it is not inhaled as it is classed as a suspected carcinogen.
An old article from the guardian newspaper discusses the decision by the EU to only list the warning on the powder from.
