**Acknowledgements**

**Figure 7.** Effect of initial MO concentration on the photoactivity of 0.5 M ZnO-SEP.

loss during each collection and rinsing steps.

242 Advanced Catalytic Materials - Photocatalysis and Other Current Trends

**Figure 8.** Reuse properties of 0.5 M ZnO-SEP.

The stability of 0.5 M ZnO-SEP catalyst was examined by recycling experiments (Figure 8). For each run, 0.5 M ZnO-SEP was filtrated, washed and calcined at 500°C for 2 h. After four cycles, the percentage of MO remaining in solution was found to increase by only approximately 3% (from 19.8% to 22%). The slight increment in the percentage can be attributed to the catalyst

This study was supported by the Boğaziçi University Research Foundation (Project No. 14B05P11/8820).
