L-tyrosine-assisted synthesis of nanosilver/titanium nitride with hollow microsphere structure for electrochemical detection of hydrogen peroxide

The nano-Ag–TiO 2 hollow microsphere precursors were prepared by the one-pot solvothermal method using L-tyrosine as the template agent and reducing agent. Subsequently, the nano-Ag–TiN hollow microsphere composites were formed by reducing nitride in an ammonia-filled atmosphere. The esterification of ethanol solvent and L-tyrosine microdroplet template generates traces of water in situ for the hydrolysis of alkane titanium. As the L-tyrosine microdroplet templates are sacrificed and incorporated into the titanium dioxide matrix, a hybridized hollow structure is formed. With the help of L-tyrosine, the surface of Ag–TiO 2 hollow microsphere precursors appeared folded rough surface, and the nanosilver was mostly distributed in the TiO 2 spherical shell. The constructed Ag–TiO 2 hollow microsphere demonstrated a good linear relationship between the current response value and the concentration in the range of 0.2–220 μM of H 2 O 2 , with the lowest detection limit of 0.04 μM. In the same concentration range, whereas the lowest detection limit of Ag–TiN hollow microsphere was 0.02 μM. The detection results of H 2 O 2 revealed that the Ag–TiN/HMS electrode has outstanding interference resistance, stability, and repeatability.