Preparation of N-Doped TiO<sub>2</sub>-ZrO<sub>2</sub> Composite Films under Electric Field and Heat Treatment and Assessment of Their Removal of Methylene Blue from Solution

<table>SEM surface micrograph of the samples after EF&amp;H treatment at 6000 V/cm and 500°C for 1 h.</table>

Advances in Materials Science and Engineering

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Figure 3: Preparation of N-Doped TiO<sub>2</sub>-ZrO<sub>2</sub> Composite Films under Electric Field and Heat Treatment and Assessment of Their Removal of Methylene Blue from Solution 

Figure 3 | Preparation of N-Doped TiO2-ZrO2 Composite Films under Electric Field and Heat Treatment and Assessment of Their Removal of Methylene Blue from Solution 