Synthesis of mesoporous TiO2-B nanobelts with highly crystalized walls toward efficient H2 evolution

Ping Li, Qing Cao, Dehua Zheng, Abdulmohsen Ali Alshehri, Yousef Gamaan Alghamidi, Khalid Ahmed Alzahrani, Minjun Kim, Jie Hou, Linfei Lai, Yusuke Yamauchi, Yusuke Ide, Yoshio Bando, Jeonghun Kim, Victor Malgras, Jianjian Lin

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Mesoporous TiO2 is attracting increasing interest due to properties suiting a broad range of photocatalytic applications. Here we report the facile synthesis of mesoporous crystalline TiO2-B nanobelts possessing a surface area as high as 80.9 m2 g−1 and uniformly-sized pores of 6–8 nm. Firstly, P25 powders are dissolved in NaOH solution under hydrothermal conditions, forming sodium titanate (Na2Ti3O7) intermediate precursor phase. Then, H2Ti3O7 is successfully obtained by ion exchange through acid washing from Na2Ti3O7 via an alkaline hydrothermal treatment. After calcination at 450 °C, the H2Ti3O7 is converted to a TiO2-B phase. At 600 °C, another anatase phase coexists with TiO2-B, which completely converts into anatase when annealed at 750 °C. Mesoporous TiO2-B nanobelts obtained after annealing at 450 °C are uniform with up to a few micrometers in length, 50–120 nm in width, and 5–15 nm in thickness. The resulting mesoporous TiO2-B nanobelts exhibit efficient H2 evolution capability, which is almost three times that of anatase TiO2 nanobelts.

Original languageEnglish
Article number919
JournalNanomaterials
Volume9
Issue number7
DOIs
Publication statusPublished - 2019 Jul

Bibliographical note

Funding Information:
Acknowledgement: The project was supported by the National Natural Science Foundation of China (NSFC) (61604070, 21701096), the National Natural Science Foundation of Jiangsu Province (BK20161000), the Natural Science Foundation of Shandong Province (No. ZR2016BQ03), Talent Fund of Shandong Collaborative Innovation Center of Eco-Chemical Engineering (XTCXQN05), and the State Key Laboratory of Fine Chemicals (KF 1601). This project was also supported by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah. The authors, therefore, acknowledge with thanks DSR for technical and financial supports.

Publisher Copyright:
© 2019 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)

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