Anatase TiO2 Quantum Dots with a Narrow Band Gap of 2.85 eV Based on Surface Hydroxyl Groups Exhibiting Significant Photodegradation Property

作者：Deng, Qixin; Zhang, Weifeng; Lan, Tongbin; Xie, Jianping; Xie, Wei; Liu, Zechun; Huang, Yanjun; Wei, Mingdeng^*

来源：European Journal of Inorganic Chemistry, 2018, 2018(13): 1506-1510.

DOI：10.1002/ejic.201800097

• Quantum dots
• Sol-gel processes
• Semiconductors
• Photodegradation
• Photochemistry

Anatase TiO2 quantum dots (QDs) with surface hydroxyl groups and particle size below 3 nm were synthesized via a new synthetic route and showed a low band-gap energy of 2.85 eV and good dispersibility in an aqueous system. This material exhibited significantly high photocatalytic activity for the degradation of methyl orange (MO). The photocatalytic activity of TiO2 QDs was 16 times higher than that of commercial P25 at an initial MO concentration of 50 mgL(-1) in the reaction system. At a concentration of 10 mgL(-1), MO could almost be completely removed within 1 min. The high photocatalytic activity could be attributed to the low band-gap energy, large surface area, and good aqueous dispersibility of the anatase TiO2 QDs.

• 出版日期2018-4-9
• 单位中国烟草总公司郑州烟草研究院; 福州大学