超声驱动制备Au/CdS催化剂及其高效光催化产氢北大核心CSCD

以HAuCl_(4)为前驱体,采用一种简单、快速的超声驱动法,在甲醇溶液中形成Au纳米粒子并沉积在CdS基底上合成Au/CdS,用于光催化分解水产氢.结果表明:当沉积Au的含量达到1.0%(质量分数)时,Au/CdS的产氢活性显著增强,可达到6.7 mmol·g^(-1) ·h^(-1) ,是纯CdS的21.6倍.超声驱动可在甲醇溶液中有效将前驱体(HAuCl_(4))中的Au3+还原为Au纳米粒子,并与CdS表面紧密作用,提高了光生电荷的分离效率,实现了高效光催化产氢.有关结果为快速、有效制备光催化产氢性能较好的金属/半导体催化剂提供了新的方法.

Ultrasound-driven Deposition of Au Nanoparticles on CdS for Efficient Photocatalytic Hydrogen Evolution

A facile and rapid ultrasound-driven approach was utilized to deposit Au nanoparticles on CdS substrate with HAuCl4 as a precursor in methanol, which was achieved by ultrasonic irradiation in an ultrasonic cleaning bath. The photocatalytic hydrogen evolution activity of the resulted Au/CdS is significantly enhanced, even up to 6.7mmol g-1 h-1, which is 21.6 times as many as that of pure CdS. Various characterizations revealed that ultrasound irradiation can drive the reduction of Au3+ in the precursor (HAuCl4) and the close interaction of the formed Au nanoparticles to the surface of CdS, which effectively improves the separation efficiency of photogenerated charges and enhances photocatalytic hydrogen production. This work provides a new perspective for the rapid and efficient preparation of metal/semiconductor catalysts with excellent photocatalytic performance for hydrogen evolution.