Heterojunction GeSe/TiO2 composite photocatalyst and preparation method thereof

The invention discloses a heterojunction GeSe/TiO2 composite photocatalyst and a preparation method thereof. GeSe and TiO2 are in contact to form an II-type heterojunction, and photogenerated holes and electrons can be effectively separated, so that the service life of the heterojunction GeSe/TiO2 composite photocatalyst is prolonged, and the catalytic efficiency is remarkably improved. GeSe is introduced into the photocatalyst, the band gap of the material is smaller than that of TiO2, the acceptable effective light range is wider, and the light energy utilization efficiency is effectively improved. The reaction mechanism of the photocatalyst GeSe/TiO2 is Z-scheme, and oxidation active sites and reduction active sites are effectively separated, so that the overall photocatalytic activity is improved, and the hydrogen production amount is greatly increased. 本文发明公开了一种异质结GeSe/TiO2复合光催化剂及其制备方法，利用GeSe和TiO2接触形成Ⅱ型异质结，能有效分离光生空穴和电子，从而延长其寿命，显著提高催化效能。所述光催化剂引入了GeSe，这种材料带隙相对TiO2较小，能接受的有效光范围更广，有效提升了光能利用效率。所述光催化剂GeSe/TiO2的