0D/2D AgInS2/MXene Z-scheme heterojunction nanosheets for improved ammonia photosynthesis of N2

Qin, J., Hu, X., Li, X., Yin, Z., Liu, B. and Lam, K.-h. (2019) 0D/2D AgInS2/MXene Z-scheme heterojunction nanosheets for improved ammonia photosynthesis of N2. Nano Energy, 61, pp. 27-35. (doi: 10.1016/j.nanoen.2019.04.028)

Abstract

In order to explore efficient photocatalysts for N2 reduction reaction (NRR), 0D AgInS2 nanoparticles and 2D MXene (Ti3C2) nanosheets with different mass ratios are employed for building Z-scheme heterostructures. The resultant hybrids exhibit excellent interfacial charge transfer ability according to their optical and photo-electro properties. As a result, the obtained composite (30 wt% AgInS2) shows significant improvement on the photocatalytic performance for N2 fixation with a high ammonia yield rate of 38.8 μmol/(g∙h) under visible-light illumination (>400 nm). Meanwhile, the DFT calculations show that the activation of N2 in a dinuclear end-on bound structure could lead to high adsorption energy (Ead = −5.20 eV). Moreover, the mechanism of enhanced photocatalytic activity was proposed in terms of the quantum calculation between Ti3C2 and N2. This work provides new systems for enhanced NRR performance.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Qin, J., Hu, X., Li, X., Yin, Z., Liu, B., and Lam, K.-h.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Nano Energy
• Publisher: Elsevier
• ISSN: 2211-2855
• ISSN (Online): 2211-3282

Related URLs

• Other