“…Heterojunction-based nanosized photocatalysts have been widely investigated in the literature review for photoreforming of several organic compounds [14,22,29,48]. Different preparation methods were adopted by researchers, such as the sol-gel method, photodeposition, photoelectrochemical deposition, wet impregnation, thermal, solvothermal and hydrothermal methods, precipitation, chemical vapor deposition, etc.…”