摘要
二维层状材料由于其超薄的厚度和大量的暴露反应位点,在光催化领域显示出诱人的前景,且其对光生载流子转移的有效调节更有利于进一步提高催化性能.在此,我们通过简单的静电自组装工艺合成了直接Z型2D/2D异质结,ZnIn_(2)S_(4)/Ti-BPDC.超薄层状形貌使催化剂具有更多的暴露活性位点和较短的电荷转移距离.两种半导体间较大的接触界面和紧密相互作用保障了平滑的相间电子传输通道.交错且匹配的能带结构为构造内部电场和能带弯曲以实现Z型电荷转移提供了基础.得益于上述各方面的协同作用,ZnIn_(2)S_(4)/Ti-BPDC异质结显示出显著增强的界面光生载流子转移效率和光催化析氢性能.此外,该2D/2D ZnIn_(2)S_(4)/Ti-BPDC异质结具有优异的稳定性和可回收性,在可持续能源转换领域表现出一定的应用潜能.
Two-dimensional(2D)lamellar materials have an appealing prospect in the field of photocatalysis due to their ultrathin thickness and exposed reactive sites.The regulation of photogenerated carrier transfer is more conducive to further enhancing catalytic performance.Herein,a direct Zscheme 2D/2D heterojunction of ZnIn_(2)S_(4)/Ti-BPDC was synthesized using a simple electrostatic self-assembly process.The morphology of the ultrathin lamellar endows the catalyst with more exposed active sites and a short charge transfer distance.The large contact interface and intimate interaction between the two semiconductors ensure a smooth interphase electron transport channel.The matching of staggered band structures provides the basis for constructing an internal electric field and band bending to realize Z-scheme charge transfer.Benefiting from the combined effects of these aspects,ZnIn_(2)S_(4)/Ti-BPDC showed substantially enhanced interface photogenerated carrier transfer efficiency and photocatalytic hydrogen evolution performance.Moreover,the 2D/2D ZnIn_(2)S_(4)/Ti-BPDC heterojunction possessed excellent stability and recyclability,showing potential for applications in sustainable energy conversion.
作者
何潇宇
吴笳鸣
李克艳
刘民
时海南
杜君
宋春山
王翔
郭新闻
Xiaoyu He;Jiaming Wu;Keyan Li;Min Liu;Hainan Shi;Jun Du;Chunshan Song;Xiang Wang;Xinwen Guo(State Key Laboratory of Fine Chemicals,Frontiers Science Center for Smart Materials,PSU-DUT Joint Center for Energy Research,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China;Department of Chemistry,Faculty of Science,the Chinese University of Hong Kong,Hong Kong,China)
基金
supported by the National Natural Science Foundation of China(22278056)
Liaoning Revitalization Talent Program(XLYC2008032)
the Fundamental Research Funds for the Central Universities(DUT22LAB602)。
