Procedure: TiO2 Suspension
	• Begin with 6g colloidal Degussa P25 TiO2 • Incrementaly add 1mL nitric or acetic acid solution (pH 3-4) nine times, while grinding in mortar and pestle • Add the 1mL addition of dilute acid solution only after previous mixing creates a uniform, lump-free paste • Process takes about 30min and should be done in ventilated hood • Let equilibrate at room temperature for 15 minutes