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Intercalative hybridization of layered double hydroxide nanocrystals with mesoporous g-C3N4 for enhancing visible light-induced H-2 production efficiency
- Title
- Intercalative hybridization of layered double hydroxide nanocrystals with mesoporous g-C3N4 for enhancing visible light-induced H-2 production efficiency
- Authors
- Lee, Jang Mee; Yang, Jae-Hun; Kwon, Nam Hee; Jo, Yun Kyung; Choy, Jin-Ho; Hwang, Seong-Ju
- Ewha Authors
- 최진호; 황성주
- SCOPUS Author ID
- 최진호; 황성주
- Issue Date
- 2018
- Journal Title
- DALTON TRANSACTIONS
- ISSN
- 1477-9226
1477-9234
- Citation
- DALTON TRANSACTIONS vol. 47, no. 9, pp. 2949 - 2955
- Publisher
- ROYAL SOC CHEMISTRY
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Efficient visible light active hybrid photocatalysts for H-2 production can be synthesized by the intercalative hybridization of Zn-Cr-layered double hydroxide (Zn-Cr-LDH) with a mesoporous g-C3N4 lattice. Small Zn-Cr-LDH nanocrystals with a size of similar to 6 nm are immobilized in the mesopores of g-C3N4. Beyond an optimal LDH/g-C3N4 molar ratio of 0.3, a further increase in the LDH content leads to the surface deposition of LDH crystals on the g-C3N4 material as well as the intercalative immobilization of LDH into its mesopores, indicating the controllability of the LDH deposition site. The Zn-Cr-LDH-g-C3N4 nanohybrids exhibit smaller surface areas than the pristine g-C3N4, confirming the intercalative stabilization of Zn-Cr-LDH nanocrystals in the mesopore of g-C3N4. The hybridization between Zn-Cr-LDH and g-C3N4 is effective in enhancing visible light absorptivity and also in depressing electron-hole recombination, which is attributable to an efficient electronic coupling between both the hybridized components. The present Zn-Cr-LDH-g-C3N4 nanohybrid exhibits promising photocatalytic activities for visible light-induced H-2 production at a rate of 155.7 mu mol g(-1) h(-1), which is much superior to that of the pristine g-C3N4 (21.7 mu mol g(-1) h(-1)). The present study underscores that the intercalative immobilization of Zn-Cr-LDH crystals in the limited space of a mesopore is quite useful in improving the visible light active photocatalyst functionality of mesoporous carbon nitride.
- DOI
- 10.1039/c7dt03466k
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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