In situ glow discharge plasma electrolytic synthesis of reduced TiO2 for enhanced visible light photocatalysis

摘要: Reduced titanium dioxide (TiO2−x) due to its extraordinary visible light absorption has been widely investigated in photodegradation and water splitting nowadays. However, conventional routes synthesize reduced TiO2 usually demand multiple preparation steps, harsh controlled conditions or expensive facilities. Here we developed a single-step situ approach prepare the gray TiO2−x nanoparticles (sub-10 nm) effectively by glow discharge plasma electrolysis (GDPE) under atmospheric pressure. The co-existence of self-doped oxygen vacancies Ti3+ generated is demonstrated electron paramagnetic resonance (EPR). tunable ratio bulk/surface defect can be realized controlling power directly. It should noticed that synthesized are quite stable ambient air. UV–vis spectra show an enhanced absorption, which leads high visible-light photocatalytic activity. Moreover, as-prepared after 6 months storage still shows excellent stability during reactions. Owing simplicity effectivity, this method with GDPE provide large-scale production for photoactivity.