Modified blue TiO2 nanostructures for efficient photo-oxidative removal of harmful NOx gases

• Published in: The Korean journal of chemical engineering Vol. 37; no. 9; pp. 1507 - 1514
• Main Authors: Nguyen, Hao Huy, Gyawali, Gobinda, Martinez-Oviedo, Adriana, Nguyen, Hoang Phuc, Lee, Soo Wohn
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2020; Springer Nature B.V; 한국화학공학회
• Subjects: Biotechnology; Catalysis; Chemistry; Chemistry and Materials Science; Electromagnetic absorption; Environmental Engineering; Ethylenediamine; Holes (electron deficiencies); Industrial Chemistry/Chemical Engineering; Light irradiation; Lithium; Materials Science; Nanostructure; Oxidation; Photoluminescence; Titanium dioxide; 화학공학; Blue TiO; Gas; NO; Photocatalyst; Oxygen Vacancy
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-020-0560-z

Blue TiO 2 nanostructures were produced via Lithium/ethylenediamine (Li/EDA) reduction method and applied for photo-oxidative removal of harmful NO x gases under simulated solar light irradiation. Blue TiO 2 possesses some unique physicochemical properties such as enhanced visible-light absorption, superficial defects or oxygen vacancies, and the evolution of Ti 3+ species. Moreover, the photoluminescence spectra (PL) revealed the efficient separation of photoinduced electron-hole pairs in the modified blue TiO 2 nanostructures, enhancing their photocatalytic activities. The results indicated that the blue TiO 2 nanostructures exhibited the highest performance towards photo-oxidation of NO x gases, with an efficiency of 72.6% under simulated solar light irradiation.