The fabrication of magnetic recyclable nitrogen‐doped titanium dioxide/calcium ferrite/diatomite heterojunction nanocomposite for improved visible‐light‐driven degradation of tetracycline

2019 ◽  
Vol 94 (8) ◽  
pp. 2702-2712 ◽  
Author(s):  
Yan Chen ◽  
Qiong Wu ◽  
Jun Wang ◽  
Youtao Song
2013 ◽  
Vol 228 ◽  
pp. 756-764 ◽  
Author(s):  
Hyun Uk Lee ◽  
Soon Chang Lee ◽  
Saehae Choi ◽  
Byoungchul Son ◽  
Sang Moon Lee ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Junjie Qian ◽  
Guanjun Cui ◽  
Mingjun Jing ◽  
Yan Wang ◽  
Min Zhang ◽  
...  

Nitrogen-doped titanium dioxide (N-dopedTiO2) photocatalyst was synthesized from nanotube titanic acid (denoted as NTA; molecular formulaH2Ti2O5·H2O) precursorviaa hydrothermal route in ammonia solution. As-synthesized N-dopedTiO2catalysts were characterized by means of X-ray diffraction, transmission electron microscopy, diffuse reflectance spectrometry, X-ray photoelectron spectroscopy, electron spin resonance spectrometry and Fourier transform infrared spectrometry. It was found that nanotube ammonium titanate (NAT) was produced as an intermediate during the preparation of N-dopedTiO2from NTA, as evidenced by the N1sX-ray photoelectron spectroscopic peak ofNH4 +at 401.7 eV. The catalyst showed much higher activities to the degradation of methylene blue and p-chlorophenol under visible light irradiation than Degussa P25. This could be attributed to the enhanced absorption of N-dopedTiO2in visible light region associated with the formation of single-electron-trapped oxygen vacancies and the inhibition of recombination of photo-generated electron-hole pair by doped nitrogen.


2016 ◽  
Vol 40 (4) ◽  
pp. 3000-3009 ◽  
Author(s):  
Sajid Ali Ansari ◽  
Mohammad Mansoob Khan ◽  
Mohd Omaish Ansari ◽  
Moo Hwan Cho

Energy level diagrams for undoped and N-doped TiO2 for visible light induced photocatalytic application.


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