Molecularly tunable heterostructure S-scheme photocatalyst for hydrogen production through effective pH control of trititanate nanotube/dopamine interaction

Yunzong Liu, Shiqi Zhao, Xiaorong Cheng, Shao-chi Wu, Qingyuan Li, Yanan Zhao, Bochao Dong, Xiyang Liu, Graham Dawson

Research output: Contribution to journalArticlepeer-review

Abstract

An S-scheme photocatalyst combining trititanate nanotubes and dopamine was prepared under different pH conditions resulting in tailored energy level modification and a molecularly tunable heterostructure. We have found that the initial pH of the reaction has a profound effect on the product and activity for water splitting, and have investigated the structure of the surface coating prepared by the different reactions occurring under these conditions by powder X-Ray diffraction, solid state NMR and UV–vis spectroscopy. The best sample for hydrogen production was prepared under pH 12 conditions and had a hydrogen production rate of 590 µmolg-1h−1. This simple organic modification can effectively create an s-scheme heterojunction and is a widely applicable and facile method of doing so.
Original languageEnglish
JournalJournal of Industrial and Engineering Chemistry
DOIs
Publication statusPublished - 20 Dec 2024

Keywords

  • S-scheme photocatalyst
  • Polydopamine
  • Nanomaterials
  • Hydrogen generation
  • Trititanate nanotubes
  • Molecularly tunable heterostructure

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