Graphene/TiO$_2$ hydrogel: a potential catalyst to hydrogen evolution reaction

Bulletin of materials science

VIRGIL CHRISTIAN CASTILLO¹  JULIET Q DALAGAN² 

[1] Department of Chemistry, Ateneo de Manila University, Loyola Heights, Quezon City 1108, Philippines$$Department of Chemistry, Ateneo de Manila University, Loyola Heights, Quezon City 1108, PhilippinesDepartment of Chemistry, Ateneo de Manila University, Loyola Heights, Quezon City 1108, Philippines$$;Chemistry Department, Xavier University, Corrales Avenue, Cagayan de Oro City 9000, Philippines$$Chemistry Department, Xavier University, Corrales Avenue, Cagayan de Oro City 9000, PhilippinesChemistry Department, Xavier University, Corrales Avenue, Cagayan de Oro City 9000, Philippines$$

关键词: Graphene;    hydrogen evolution reaction;    photocatalyst;    titanium oxide.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In this study, graphene was synthesized from graphite. Graphite was oxidized via modified Hummer’s method and sonicated to form graphene oxide (GO). Infrared spectroscopy revealed the successful oxidation of graphite by the emergence of oxygen functionalities. The spectrum of GO showed peaks at 3270, 1629, 1227 and 1096 cm$^{�?1}$, indicating O�?�H, C=O, C�?�OH and C�?�O�?�C functional groups, respectively. Graphene hydrogels were prepared by the addition of L-ascorbic acid to GO suspensions and subsequent heating at 90$^{circ}$C. Composite hydrogels of graphene and titanium (IV) oxide (TiO$_2$) were synthesized with various TiO$_2$ to GO mass ratios. Composites were applied to photocatalytic hydrogen evolution reaction (HER) and the hydrogen gas produced was analysed by gas chromatography with thermal conductivity detector. Highest HER yield was 66.00% H$_2$.

【 授权许可】

Unknown