全固态Z型Ag3PO4/RGO/Bi2WO6三元复合光催化剂可见光驱动高效降解四环素

Highly Efficient Degradation of Tetracycline by All-solid-state Z-scheme Composite Photocatalyst Ag3PO4/RGO/Bi2WO6 under Visible Light Condition

在日益增长的环境污染和能源短缺的情况下,光催化技术凭借其绿色、高效的特点,受到诸多科研工作者的关注。将Ag3PO4和Bi2WO6纳米晶体材料与还原氧化石墨烯相结合,构建全固态Z型Ag3PO4/RGO/Bi2WO6复合光催化剂,还原氧化石墨烯作为其中的电子传导介质,有效的将光生电子从Bi2WO6的导带转移到Ag3PO4的价带,从而有效的产生光生电子和空穴,较好的提高了光催化性能。研究表明,可见光照射下,对四环素的降解率可达91%。为目前环境污染等相关领域提供一种有效的光催化剂的制备方法。

The photocatalytic technology as a kind of green and potential technology has been paid more and more attention in ever-increasing environmental pollution and energy shortage.A practical strategy is proposed to facilitate effectively the separation of photogenerated electrons and holes by addition of reduced graphene oxide in Ag3PO4 and Bi2WO6 nanocrystals semiconductor composite.Compared with RGO-single component,the three-component RGO-Ag3PO4/Bi2WO6 composites exhibited improved photocatalytic activity,with a degradation rate that reached up to 91% for tetracycline (TC)by visible light irradiation driven. Reduced graphene oxide served as an electronic conduction medium is used to effectively transfer of the photogenerated electrons from the conduction band of Bi2WO6 to the valence band of Ag3PO4,the all-solid-state Z-scheme photocatalytic mechanism was proposed.An effective method for development of pragmatic photocatalyst was provided in present environmental pollution,energy problems and other related fields.