A rapid solar reduction method to TiO2/MoO2/graphene nanocomposites for photocatalytic water splitting

S. S. Jyothirmayee Aravind, Kandalam Ramanujachary, Timothy D. Vaden, Amos Mugweru

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Semiconductor photocatalysis has emerged as an interesting area of research since the discovery of Honda-Fujishima effect. In this study, TiO2/MoO2/graphene composites have been prepared by a solar radiation-assisted co-reduction method, wherein ammonium tetrathiomolybdate salt and graphite oxide are reduced to M0O2 and graphene respectively along with TiO2. The method involved the utilization of focused pulses of natural sunlight using a simple convex lens, thereby eliminating the need for harmful reducing agents. The compound was characterized by XRD and SEM for phase identification and morphology. The TiO2/MoO2/graphene composite exhibits superior photocatalytic water splitting activity without using a co-catalyst. In addition, we demonstrate the electrocatalytic hydrogen production using this earth abundant catalyst, which shows high current density (60 mA/cm2) and low Tafel slope (47 mV/dec). The hydrogen evolved during photocatalysis was detected by gas chromatography.

Original languageEnglish (US)
Title of host publicationSustainable Solar-Energy Conversion Using Earth-Abundant Materials
EditorsY. Li, S. Mathur, G. Zheng
PublisherMaterials Research Society
Number of pages6
ISBN (Electronic)9781510806184
StatePublished - Jan 1 2015
Event2014 MRS Fall Meeting - Boston, United States
Duration: Nov 30 2014Dec 5 2014

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2014 MRS Fall Meeting
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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