Micro-terminal regulation in nanoreactors for the construction of tantalum pentoxide single-crystal ordered networks with promoting enhanced hydrogen evolution performance
Micro-terminal regulation in nanoreactors for the construction of tantalum pentoxide single-crystal ordered networks with promoting enhanced hydrogen evolution performance
复制标题
纳米反应器中微末端调控构建五氧化二钽单晶有序网络并促进析氢性能增强
DOI：
10.1016/j.cej.2021.134139
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发表时间：
2022
影响因子：
15.1
通讯作者：
Jian Liu
中科院分区：
文献类型：
--
作者：
Xuewen Wang;Lei Gan;Qingzhuo Lin;Sheng Ye;Rongbin Zhang;Jian Liu
光催化半导体的有序大孔结构可以实现平稳的传质、高的氢释放效率和多反应位点界面。远程电子通信和结构连续性是实现这些目标所必需的。单晶有序网络结构是满足上述要求的理想选择。然而，由于晶界的快速形成，制造这种连续的单晶结构非常具有挑战性。本研究选择高度有序的聚甲基丙烯酸甲酯（PMMA）为载体，构建纳米反应器。在纳米反应器中开发了一种微终端，为Ta2O5单晶有序网络（SCON-Ta2O5）提供了合适的生长环境。通过调节纳米反应器空间，系统研究了传质通道和载流子迁移距离对scon - ta2o5光催化性能的影响。在SCON-Ta2O5上实现了显著改善的光催化氢性能。因此，scon - ta2o5在其他方面具有很大的应用潜力，这种通用的合成策略可以将大孔单晶生长的可能性扩展到其他功能半导体。
The ordered macroporous structure of photocatalytic semiconductors can enable smooth mass transfer, high hydrogen release efficiency and multiple reaction site interfaces. Remote electronic communications and structural continuity are necessary to achieve these goals. The single-crystal ordered network structures are ideal candidates to meet the above requirements. However, fabricating such continuous single-crystal structures is very challenging due to the rapid formation of grain boundaries. In this study, highly ordered poly(methyl methacrylate) (PMMA) was chosen as hosts to build a nanoreactor. A micro-terminal was developed in nanoreactors to generate the suitable growth environment for single-crystal ordered networks of Ta2O5(SCON-Ta2O5). By regulation of the nanoreactor space, the effect of mass transfer channel and carrier migration distance on the photocatalytic performance of SCON-Ta2O5was systematically investigated. A substantially improved photocatalytic hydrogen performance was realized on SCON-Ta2O5. Thus, SCON-Ta2O5has a great potential in other applications and this general synthetic strategy could extend the possibility of macroporous single-crystal growth to other functional semiconductors.