TAILIEUCHUNG - Treating toluen with nano titanium dioxit doped nitrogen cover on alumina oxit fiber (N-TiO2/AL2O3 )
Treating toluen with nano titanium dioxit doped nitrogen cover on alumina oxit fiber (N-TiO2/AL2O3 ). We study photocatalysis of toluene in ambient air by using nitrogen doped TiO 2 (N-TiO 2 ) covered on alumina (Al 2 O 3 ) fiber using a mixed solution of tetraisopropoxit titanium (TTIP), diethanolamine (DEA) and ethanol (EtOH) with different molar ratios (TTIP:DEA:EtOH =1:1:34 and 1:2:34) by sol-gel method. | Tạp chí phân tích Hóa, Lý và Sinh học – Tập 22, Số 4/2017 XỬ LÝ TOLUEN BẰNG VẬT LIỆU NANO TiO2 PHA TẠP NITƠ PHỦ TRÊN SỢI OXIT NHÔM (N-TiO2/Al2O3) Đến tòa soạn 24 - 8 - 2017 Nguyễn Thị Huệ Viện Công nghệ môi trường, Trường ĐHKHCN HN, Viện HL KH&CNVN Mã Thị Anh Thƣ Học viện Khoa học và Công nghệ, Viện HLKH&CNVN. Nguyễn Mạnh Nghĩa Học viện Khoa học và Công nghệ, Viện HLKH&CNVN. SUMMARY TREATING TOLUEN WITH NANO TITANIUM DIOXIT DOPED NITROGEN COVER ON ALUMINA OXIT FIBER (N-TiO2/Al2O3) We study photocatalysis of toluene in ambient air by using nitrogen doped TiO2 (N-TiO2) covered on alumina (Al2O3) fiber using a mixed solution of tetraisopropoxit titanium (TTIP), diethanolamine (DEA) and ethanol (EtOH) with different molar ratios (TTIP:DEA:EtOH =1:1:34 and 1:2:34) by sol-gel method. The crystalline structure and the uniformity of N-TiO2 layers on Al2O3 fiber were confirmed by XRD. The morphology of the coatings was observed by SEM. UVVIS devices used to determine the absorption spectrum of N-TiO2 samples. SEM analysis indicates that N-TiO2 is granular. XRD analysis has shown that when increasing DEA moles from 1 to 2, the N-TiO2 particle size not be much decreases, but the crystallization is finer in the sol solution which DEA mole is 2. When doping nitrogen, that is creating the Ti-N link and the absorption edge of the N-TiO2 have shifted into visible light region of about 27 – 40 nm compared with TiO2 - P25. Toluene with the concentration of mg/m3 can be easily decomposed by NTiO2/Al2O3 under UV light (365nm, 40W) and daylight at illuminated distance of 20 cm. The result showed that the toluen treated efficiency was 90% and 70% for UV light and daylight by N-TiO2/Al2O3, respectively. Thus, N-TiO2 coated on Al2O3 fiber is suitable for the treatment hazardous substances in air environment. Keyword: TiO2, N-TiO2, Al2O3, toluene, ambient air. 115 1. MỞ ĐẦU Để xử lý các tác nhân ô nhiễm trong không khí như VOCs, vi khuẩn, nấm, mốc, người ta thường sử d ng m t .
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