Bi2O3 quantum dots decorated TiO2nanobelt heterojunctions with enhanced visible-light photoactivity

作者：Chen, Zimei; Wang, Jinguo^*; Zhai, Guangjun; He, Rong; Jia, Xin; Sun, Qiuyan; Men, Yong

来源：Micro & Nano Letters, 2018, 13(12): 1734-1738.

DOI：10.1049/mnl.2018.5023

• photochemistry
• adsorption
• nanofabrication
• semiconductor materials
• catalysts
• nanobelts
• dyes
• titanium compounds
• semiconductor growth
• catalysis
• bismuth compounds
• semiconductor quantum dots
• semiconductor heterojunctions
• crystal growth from solution
• charge exchange
• surface diffusion
• visible-light photoactivity
• quantum dots
• nanobelt heterojunctions
• two-step hydrothermal process
• photosensitising sites
• photoelectron transfer
• surface area
• diffusion
• reactant molecules

Bi2O3 quantum dots decorated TiO2 nanobelt heterojunctions were synthesised by a facile two-step hydrothermal process. The Bi2O3 quantum dots highly dispersed on the surface of TiO2 nanobelts resulted in more photosensitising sites and Bi2O3-TiO2 heterojunctions, leading to the enhanced absorbance for visible light. The strong Bi2O3-TiO2 interaction promoted the rapid transfer of photoelectrons from Bi2O3 to TiO2 and thus inhibited their recombination with holes. Meanwhile, the high-surface area facilitated the adsorption and diffusion of reactant molecules. As a result, this photocatalyst exhibited highly enhanced photoactivity in degradation of organic dyes under visible-light irradiation, which also displayed strong durability owing to the strong Bi2O3-TiO2 interaction against the leaching of Bi2O3 quantum dots.

• 出版日期2018-12
• 单位上海工程技术大学