Paste for manufacturing photocatalyst and manufacturing method of photocatalyst

A manufacturing method of a photocatalyst, comprising:

• providing a paste, wherein the paste comprises:
• an alcohol paste;
• and
• a photocatalyst precursor dispersed in the alcohol paste, wherein the photocatalyst precursor comprises a first metal precursor and a second metal precursor, wherein a first metal in the first metal precursor comprises Zn, Sn, Cu, Fe, Mn, Ni, Co or Ag, and a second metal in the second metal precursor comprises Fe;
• bringing the paste in contact with an aqueous liquid such that the photocatalyst precursor in the paste is dissolved in the aqueous liquid to form a mixed solution containing a photocatalyst, wherein the photocatalyst comprises a compound represented by formula I below:
• A2+(B3+)2X4 formula I,
• wherein A2+ represents Zn2+, Sn2+, Cu2+, Fe2+, Mn2+, Ni2+, Co2+, or Ag22+, B3+ represents Fe3+, X represents O2−;
• and
• centrifuging the mixed solution containing the photocatalyst to obtain the photocatalyst.