ỨNG DỤNG APATIT / TiO2 PHA TẠP NITƠ ĐỂ KHỬ MÀU METHYLENE XANH (MB) VÀ XỬ LÝ BENZENE, TOLUENE VÀ XYLENE (BTX) TRONG KHÔNG KHÍ
The apatite coating on TiO2 doped N (Ap/TiO2-Npha), is both a adsorbent and photocatalytic activity, which works in visible light.
Ap/TiO2 - phaN is synthesized through 3 stages including: (1) synthesizing N-TiO2 powder, (2) synthesizing Ap/TiO2 - phaN powder and (3) synthesizing Ap/TiO2 - phaN suspension solution.
Ap/TiO2 - phaN is capable of absorbing MB color and treating BTX mixture in air. MB concentration was determined by UV-Vis and BTX by Drager (Germany). In dark condition, Ap/TiO2 and Ap/TiO2 - phaN absorb part of the MB. When illuminated (20W, 365nm), MB (20 ppm) was completely reduced
after 120 min for Ap/TiO2 - phaN material, while MB only decomposed to 18% for Ap/TiO2 samples. Ap/TiO2 - phaN is also effective in treating BTX mixture at a practical scale, after 10 hours of lighting, the concentration of xylene, toluene is reduced to nearly the permitted level while benzene drops to QCVN
05: 2013 / BTNMT. Compared with Ap/TiO2 materials, Ap/TiO2 - phaN is superior in processing speed and using lamp’s light. This is very economical when using solar light instead