2.1.2. Synthesis of BiOCl

In brief, 5 mmol bismuth nitrate (Bi(NO3)3·5H2O, 99.5%) and 5 mmol potassium chloride (KCl) were added into 30 mL deionized water (DI water) and stirred for 0.5 h. Then, the above solution was transferred into a 50 mL Teflon-lined autoclave and heated at 180 ◦C for 12 h. The precipitate was washed thoroughly and dried at 80 ◦C.
