CdSe 1D/2D Mixed‐Dimensional Heterostructures: Curvature‐Complementary Self‐Assembly for Enhanced Visible‐Light Photocatalysis
- 12 July 2021
- Vol. 17 (33), 2102047
- https://doi.org/10.1002/smll.202102047
Abstract
Mixed-dimensional heterostructures (MDHs), which combine nanomaterials of different dimensionalities deliver on the promise to bypass intrinsic limitations of a given low-dimensional material. Here, a strategy to engineer MDHs between two low-dimensional materials by curvature-complementary self-assembly is described. CdSe nanotubes rolled from 2D nanosheets and 1D CdSe nanorods, with negative and positive curvatures, respectively, are selected to illustrate complementary curvature self-assembly. The assembly process, optical, and photoelectrical properties of the CdSe MDHs are thoroughly investigated. Several remarkable features of CdSe MDHs, including increased light absorption, efficient charge separation, and appropriate bandgap structure are confirmed. The MDHs significantly alleviate the sluggish kinetics of electron transfer in the quantum sized CdSe subunits (onset potential of 0.21 V vs RHE for MDHs; 0.4 V lower than their low-dimensional building blocks), while the spatial nano-confinement effect in the CdSe MDHs also assists the interfacial reaction kinetics to render them ideal photocatalysts for benzylamine oxidation (conversion > 99% in 4 h with a two times higher rate than simple mixtures). The results highlight opportunities for building MDHs from low-dimensional building blocks with curvature-complementary features and expand the application spectrum of low dimensional materials in artificial photosynthesis.Keywords
Funding Information
- National Natural Science Foundation of China (21972076, 51903140)
- China Postdoctoral Science Foundation (2019TQ0184, 2019M662350)
- Natural Science Foundation of Shandong Province (ZR2020QB109, ZR2020YQ11, ZR2019QB003)
- Natural Science Foundation of Shandong Province (ZR2019QB003)
- Postdoctoral Research Foundation of China (2019M662350)
- Young Scientists Fund (51903140)
- Major Research Plan (21972076)
This publication has 50 references indexed in Scilit:
- Tubulin Double Helix: Lateral and Longitudinal Curvature Changes of Tubulin ProtofilamentSmall, 2020
- Supramolecular polymerization through kinetic pathway control and living chain growthNature Reviews Chemistry, 2019
- Anisotropic nanomaterials for shape-dependent physicochemical and biomedical applicationsChemical Society Reviews, 2019
- High‐Performance Polymeric Materials through Hydrogen‐Bond Cross‐LinkingAdvanced Materials, 2019
- Van der Waals integration before and beyond two-dimensional materialsNature, 2019
- Nanopore sequencing and assembly of a human genome with ultra-long readsNature Biotechnology, 2018
- Dynamic DNA devices and assemblies formed by shape-complementary, non–base pairing 3D componentsScience, 2015
- Soft templates in encapsulation complexesChemical Society Reviews, 2014
- Lock and key colloidsNature, 2010
- Estimating the CO 2 Uptake in EuropeScience, 1998