Preparation of N-Doped TiO₂-ZrO₂ Composite Films under Electric Field and Heat Treatment and Assessment of Their Removal of Methylene Blue from Solution

Table 1

Degradation rate of the coextruded film annealed at 500°C for 3 h: (a) 0 V and (b) 6000 V/cm.

Sample	Degradation rate (%)
	Fluorescent lamp (40 W)	High-voltage mercury lamp (365 nm)
(a) 0 V	39	91
(b) 6000 V/cm	83	95