Highly photocatalytic activity of porous skeleton structure AlON powder synthesized by CRN under ultraviolet-light irradiation

摘要: Abstract A large-sized (∼20 μm) pure aluminum oxynitride (AlON) powder characterized by its porous skeleton structure was synthesized carbothermal reduction and nitridation (CRN) method using α-Al 2 O 3 . The photocatalytic performance of the obtained AlON studied under ultraviolet-light in methylene blue (MB) solution. In 40 ml MB solution doped with 30 mg as-synthesized powder, a photogradation efficiency as high 97% measured after irradiating 120 min, 80% mineralized determining total organic carbon (TOC) solution, i.e., mineralization is main degradation mode due to added powder. Further radical scavenger’s experiments reveal that both h + OH were dominant reactive species process It should be pointed out specific surface area smaller than solid small-sized (∼800 nm) structure. However, slightly higher reported value, which mainly attributed light reflection scattering within skeleton. as-synthesized has excellent dispersibility for large particle size. Moreover, also exhibits reusability. Therefore, an efficient promising photocatalyst.