Photoelectrochemical enzymatic sensor for glucose based on Au@C/TiO 2 nanorod arrays.

In this work, a photoelectrochemical (PEC) glucose biosensor was synthesized on the basis of a type of Au@C/TiO 2 composite by using an unsophisticated secondary hydrothermal strategy. The compounded Au@C/TiO 2 material was characterized by XRD, SEM, TEM, UV-vis, and XPS to identify the composition and the purity of the phase. Glucose oxidase (GODx) was immobilized on the Au@C/TiO 2 . The PEC biosensor presented satisfactory stability and outstanding reproducibility. The range and the sensitivity of the linear measurement were 0.1-1.6 mM and 29.76 μA mM -1 cm -2 , respectively, and the detection limit was low (0.049 mM). The GODx/Au@C/TiO 2 /FTO biosensor presented excellent efficiency in detecting glucose, suggesting the great potential application of this synthesized material in PEC biosensors.