Enhancement of visible light induced photocatalytic degradation of Eosin-Y by using TiO2 and Ag doped TiO2 nano catalyst

Content Provider	Semantic Scholar
Author	Shelar, Sunil G. Mahajan, Vilas K. Patil, Sandip P. Sonawane, Gunvant H.
Copyright Year	2019
Abstract	The faster developments in the field of nanotechnology have stimulated considerable research efforts on the synthesis and manufacturing of novel devices for various high-technological potential applications [1,2]. Nanocrystalline titanium dioxide (TiO2) has many important applications such as: solar cells [3], photocatalytic splitting of water to hydrogen and oxygen [4], sensors [5], self-cleaning surfaces and degradation of environmental pollutants [6]. Due to the stability of modern dyes, conventional biological treatment methods for industrial wastewater are ineffective, resulting often in an intensively colored discharge from the treatment facilities. Recently, a number of researchers have dealt with heterogeneous Photocatalyst and Fenton based hybrid nanocatalyst for decomposition of many kinds of dyes [7-9] by UV, visible light and solar irradiation [10]. Shoueir et al [11] reported plasmonic Au@TiO2 photocatalyst bio-based chitosan fiber for the visible light induced photocatalysis of organic and inorganic pollutants. Photocatalytic performance of the TiO2 can also improve by pulsed laser ablation in liquid [12,13].Again adsorption capability of TiO2 can be improved by decorating on eggshell nanocrystal [14]. In addition, titania has a relatively high band gap value of 3.2 eV. However for many applications it would be desirable to extend the band gap excitations towards the visible region, and also to prolong the lifetime of photogenerated charge carriers. Doping of titanium dioxide with transition metal like Pt, Au, Pd, Rh and Ag provides a relatively well-studied and convenient way of solving both problems described above. TiO2 doped with transition metal ions can demonstrate extended band gaps and significantly higher photocatalytic efficiencies [15-19]. However among these transition metals only Ag is inexpensive so that its commercial applications are extended. The dopant concentration is an important parameter to be considered, as the amount of Abstract
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