Controllable Preparation of La/TiO₂ Using Hyperbranched Polyglycerols as Template and Their Photocatalytic Performance

Abstract

Three hyperbranched polyglycerols with different molecular weight were synthesized by controlling the molar ratio of monomer and initiator. La-doped TiO₂ catalysts were synthesized by those HPG as a templating agent for size control of La/TiO₂. The photocatalytic elimination of methanol was used as model reactions to evaluate the photocatalytic activity of the catalysts. The size of La/TiO₂ particles could be adjusted by changing the molecular weight of the HPG. With the molecular weight of HPG increase, the size of La/TiO₂ particles decrease, the photocatalytic activity of the as-prepared catalysts enhance. This catalytic reaction follows the Langmuir-Hinshellwood mechanism.

Keywords:

• hyperbranched polyglycerols
• photocatalytic elimination
• templating agent
• methanol

Funding

The Project was supported by the Organic Chemistry Key Subject of Hunan Province, Special and Key Laboratory of Functional Materials and Resource Chemistry of Guizhou Provincial Education Department (GAFMRC201302).