自组装纳米复合材料MXene@Au@CdS的制备及其光催化制氢活性

Facile preparation of self-assembled MXene@Au@CdS nanocomposite with enhanced photocatalytic hydrogen production activity

光催化制氢被认为是一种有效获得清洁可持续能源的方法.常规光催化制氢使用的助催化剂(如Pt)具有成本高和难以获得的缺点.本文设计并制备了三元纳米复合材料MXene@Au@Cd S,可用于高效光催化制氢.MXene@Au@Cd S的氢气产生率为17070.43μmol g^-1h^-1(测试时间2 h),是纯Cd S纳米材料的1.85倍.MXene@Au@Cd S优异的制氢性能归因于:(i)MXene为Au和Cd S纳米颗粒提供了更多的活性吸附位点和反应中心.(ii)金的强表面等离子体共振协同效应使得Cd S的光学响应范围增大.本工作解决了光催化剂表面官能团之间的固态连接问题,并在制氢过程中实现了快速界面电荷转移和长期稳定性.

Photocatalytic hydrogen production is considered a promising approach to generating clean sustainable energy.However,the conventional co-catalyst(e.g.,Pt)used in photocatalytic hydrogen production is high-cost and difficult to obtain.Here,we designed and prepared a ternary nanocomposite MXene@Au@Cd S,which can be used in the field of efficient and excellent photocatalytic hydrogen production.The MXene@Au@Cd S has a hydrogen production rate of 17,070.43μmol g^-1h^-1(tested for 2 h),which is 1.85 times that of pure Cd S nanomaterials.The improved hydrogen production performance of the MXene@Au@Cd S is attributed to:(i)MXene provides more active adsorption sites and reaction centers for Au and Cd S nanoparticles;(ii)the synergistic effect of Au’s strong surface plasmon resonance expands the optical response range of Cd S.Therefore,this work solves the problem of the solid connection between the surface functional groups of photocatalyst,and achieves rapid interface charge transfer and long-term stability during the hydrogen production.