Ảnh hưởng của nồng độ NH3 đến thành phần pha tinh thể và tính chất quang xúc tác của n-TiO2

Abstract

Influence of NH₃ concentration to phase component and photocatalytic of N-TiO₂ has been reseached. Results showed that NH₃ is orientation agents of the structure, promoted the formation of oxygen vacancies (V₀) in crystalline N-TiO₂, narrow band gap and increase photocatalytic activity under visible light of prepered products. The interaction of NH₃ with Ti(IV) changed of electron structure and the condensation model of the precursor molecules, that  is cause of the phase component changing of the precipitation powder from rutils to anatase and amorphous. Experimental results showed that appropriate NH₃/TiCl₄ molar ratio for prepare N-TiO₂ powder is 4.2.

Keywords: N-TiO₂, photocatalytic, oxygen vacancies, phase component.