Day 2

Synthesis of the precursor:

Step 1: Weigh 182mg of vanadium pentoxide by using a weighing balance.

Step 2: Measure 15 ml of hydrogen peroxide by using a measuring cylinder + dropper.

Step 3: Mix the vanadium pentoxide and hydrogen peroxide in a beaker and stir well in a hot 

temperature, 70degree celcius, at a speed of 700rpm.

Step 4: Measure 1g of oxalic acid after the reaction in the beaker has taken place. Then, pour it in the beaker.

Step 5: Allow the reaction to take place for around 2 to 3 hours. A dark blue solution should be observed, indicating that the reaction has taken place.

Step 6: Weigh 5mg of PVP and pour into the beaker and stir well.

V₂O₅  +  2H₂O₂    →   V₂O₅ . 2H₂O + O₂

Filter the contents of the beaker through a filter funnel into a container 5 hours after step 4. Allow contents to rest in the container at least 24 hours before use.