Zinc oxide mediated heterogeneous photocatalytic degradation of organic species under solar radiation

Characterization of V2O5 nanorods grown by spray pyrolysis technique

“…Figure 4 shows the XRD diffraction patterns of the samples prepared at different substrate temperatures with constant solution concentration 0.2 mol/L and spray rate 10 ml/min. An increase of the substrate temperature, the intensity of (300) plane increases clearly up to 350°C and then decreases for higher substrate temperatures but increase the intensity of (110) with increasing substrate temperature, exhibiting crystal reorientation effect [21].…”

Photocatalytic degradation of 17α‐ethynylestradiol in environmental samples by ZnO under simulated solar radiation

“…Mechanistically, illumination of ZnO creates near or upon its surface electron-hole pairs as follows: 7,9 ZnO + hv → h…”

“…The superior performance of ZnO compared with titania may be attributed to the fact that it (i) absorbs over a wider fraction of the UV-A and near visible region of the solar spectrum, 3,6,7 and (ii) can efficiently generate hydrogen peroxide that serves as an additional source of oxidizing species. This occurs through reactions involving the peroxide radical:…”

“…4,5 An alternative approach is the use of photocatalysts that absorb over a larger fraction of the solar spectrum than TiO 2 and this seems to be the case with zinc oxide. 3,6,7 ZnO has a wide band gap energy of 3.2 eV. 3 The photocatalytic mechanism of ZnO is similar to that of TiO 2 7,8 and it also exhibits most of its beneficial features (possibly with the exception of stability as will be discussed in detail).…”

Decolorization and Mineralization of Batik Wastewater through Solar Photocatalytic Process

“…Most of previous researchers (Badawy et al 2009;Tang & Chen 2004) use TiO 2 as their photocatalyst, however, TiO 2 only show better performance under UV light irradiation. Other than that, TiO 2 also is uneconomical for large scale water treatment operations (Shinde et al 2011). Due to that reason, ZnO is found to be a suitable alternative to TiO 2 since it has higher catalytic efficiency compared to TiO 2 (Chakrabarti & Dutta 2004;Daneshvar et al 2004;Lin et al 2011;Lizama et al 2002).…”