Reduced graphene oxide supported titanium dioxide nanomaterials for the photocatalysis with long cycling life

作者：Cao Yuan Cheng^*; Fu Zhongtian; Wei Wenjun; Zou Linling; Mi Tie; He Dan; Yan Chaolu; Liu Xiyou; Zhu Ying; Chen Liuqing; Sun Yuanjie

来源：Applied Surface Science, 2015, 355: 1289-1294.

DOI：10.1016/j.apsusc.2015.08.036

• Graphene oxide
• Titanium dioxide
• Photocatalyst
• Nanomaterials
• Cycling life

The reduced Graphene Oxide (rGO) supported TiO2 (rGO@TiO2) as the photocatalyst was synthesized and evaluated. Graphene was oxided using chemical method and the AFM measurements showed that the thickness of the as-synthesized GO was 3-5 nm which indicates 4-6 layers of the resultant graphene oxide. BET surface area showed 62.4 m(2)/g for TiO2 and 247.3 m(2)/g for rGO@TiO2. Size distribution showed when the rGO ratio increases from 5% to 15% (rGO/TiO2), the resultant rGO@TiO2 samples show better size distribution in the range of 100 nm to 200 nm. Photocatalysis test showed when the exposure time increased to over 100 min, the degradation rate for rGO@TiO2 could reach to 96.4%. First order kinetics results of the rGO@TiO2 photocatalyst showed much higher degradation constant than that of the TiO2. Reproducibility test showed the rGO@TiO2 photocatalyst can keep the degradation rates at less for 25 cycles. Results showed rGO@TiO2 is a promising photocatalyst with long cycling life.

• 出版日期2015-11-15
• 单位东北大学; 江汉大学