3D hierarchical architecture collaborating with 2D/2D interface interaction in NiAl-LDH/Ti3C2 nanocomposite for efficient and selective photoconversion of CO2

• Published in: Journal of energy chemistry 2021-08, Vol.59, p.9-18
• Main Authors: Shi, Qunrong, Zhang, Xiaoyue, Yang, Yong, Huang, Junjie, Fu, Xiaolong, Wang, Tianyu, Liu, Xiaodong, Sun, Aiwu, Ge, Jianhua, Shen, Jinyou, Zhou, Yong, Liu, Zuliang
• Format: Article
• Language: English
• Subjects: Co-catalyst; CO2 photoconversion; NiAl-LDH; Photocatalysis; Ti3C2
• ISSN: 2095-4956
• DOI: 10.1016/j.jechem.2020.10.038

3D hierarchical NiAl-LDH/Ti3C2 nanocomposite collaborating with 2D/2D heterogeneousinterface is developed through precise tuning of the process for in situ loading of Ti3C2 nanosheets on NiAl-LDH, contributing to efficient and selective photoconversion of CO2. [Display omitted] Photocatalytic conversion of CO2 into a special chemical fuel with high yield and selectivity is still a major challenge. Herein, a 3D hierarchical NiAl-LDH/Ti3C2 MXene (LDH/TC) nanocomposite is constructed through in situ loading of Ti3C2 nanosheets on the NiAl-LDH scaffold during the hydrothermal process. The formation of a uniform and well-defined 2D/2D heterogeneousinterface can be realized by optimizing the ratio of Ti3C2 and the precursors for NiAl-LDH. The 3D hierarchical scaffold with high specific surface area contributes to the favourable photon adsorption and utilization. The intimate contact between Ti3C2 and NiAl-LDH with numerous interfaces effectively promotes the separation of the photoinduced electron-hole pairs in NiAl-LDH. Together with the highly exposed oxidation–reduction active sites and the enhanced CO2 capture and activation. The maximum photocatalytic CO production rate on NiAl-LDH/Ti3C2 reaches 11.82 μmol g−1h−1 with 92% selectivity and superior stability. This work provides an effective approach for the development of an ideal photocatalyst by collaborative utilization of materials with different dimensionalities.