Highly-ordered maghemite/reduced graphene oxide nanocomposites for high-performance photoelectrochemical water splitting

作者：Chandrasekaran Sundaram; Hur Seung Hyun; Kim Eui Jung; Rajagopalan Balasubramaniyan; Babu Kadumudi Firoz; Senthilkumar Velusamy; Chung Jin Suk; Choi Won Mook; Kim Yong Soo

来源：RSC Advances, 2015, 5(37): 29159-29166.

DOI：10.1039/c5ra02934a

Highly ordered gamma-Fe2O3/reduced graphene oxide (RGO) was synthesized via a facile solution technique combined with calcination at various temperatures. The maghemite iron oxide structure was obtained on the GO surface and improved crystallinity of gamma-Fe2O3 was observed as the calcination temperature increased. The prepared highly ordered maghemite structure on RGO exhibited an excellent water splitting performance under UV light (similar to 360 nm) illumination. The photocurrent density of RGO/gamma-Fe2O3 calcined at 500 degrees C was 6.74 mA cm(-2) vs. RHE and a high incident photon to current conversion efficiency (IPCE) of 4.7%, was achieved. This photocurrent density and the IPCE values are 3.7 times and 4 times higher than that of pristine iron oxide, respectively.

• 出版日期2015