Titanium dioxide is a semi - conductor with wide band gap , and its photocatalysis operates only when it is irradiated under the ultraviolet radiation of sunlight , and also , the electron hole of tio _ 2 has very high reunited rate 但由于tio _ 2為寬禁帶半導(dǎo)體,對(duì)太陽光的利用僅局限于紫外部分,并且tio _ 2的光生電子空穴復(fù)合幾率很高。
百科解釋
An electron hole is the conceptual and mathematical opposite of an electron, useful in the study of physics, chemistry, and electronic engineering. The concept describes the lack of an electron at a position where one could exist in an atom or atomic lattice.