Details
| Original language | English |
|---|---|
| Pages (from-to) | 193-205 |
| Number of pages | 13 |
| Journal | Materials Science in Semiconductor Processing |
| Volume | 75 |
| Early online date | 13 Dec 2017 |
| Publication status | Published - 1 Mar 2018 |
Abstract
In this work, novel triple metal-nonmetal doped TiO 2 (K-B-N-TiO 2) was synthesized by the sol–gel method. The structure and properties of the synthesized nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy. Photocatalytic activity of the nanoparticles was assessed by degradation of linear alkyl benzene (LAB) industrial wastewater at different operating conditions. The effects of initial pH, photocatalyst loading, initial COD concentration and reaction time on the photocatalytic performance of the nanoparticles degrading LAB wastewater were determined by response surface methodology (RSM). The region of examination for the process was taken as the area enclosed by initial COD concentration (200–500 mg/l), catalysis loading (1–2 g/l), initial pH (3–11) and reaction time (1–8 h). The doping modes reduced recombination of photogenerated electrons and holes, and extended the absorption of TiO 2 into the visible light. The photocatalyst properties of K-B-N-TiO 2 were more effective than those of pure TiO 2 and other modified single and double doped TiO 2 (B-N, K-N, N, B and K-TiO 2). The COD removal efficiencies by the photocatalysis were increased from pure TiO 2 to multi-doped TiO 2 in the following order; multi-doped TiO 2 > single-doped TiO 2 > pure TiO 2. More than 55% and 81% of COD content of the LAB industrial wastewater was mineralized under visible light and UV irradiation, respectively at optimum condition (COD of 200 mg/l, catalyst loading of 1.5 g/l and pH of 3). The BOD 5/COD ratio for the remaining COD was obtained to be about 0.4 which indicates higher biodegradability of the treated effluent in comparison with the raw wastewater.
Keywords
- LAB industrial wastewater, Photocatalytic activity, Photogenerated electron and hole, Recombination rate, Triple doped-TiO, Visible light
ASJC Scopus subject areas
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materials Science in Semiconductor Processing, Vol. 75, 01.03.2018, p. 193-205.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Application of a novel triple metal-nonmetal doped TiO2 (K-B-N-TiO2) for photocatalytic degradation of Linear Alkyl Benzene (LAB) industrial wastewater under visible light
AU - Zangeneh, H.
AU - Zinatizadeh, A.A.
AU - Feyzi, M.
AU - Zinadini, S.
AU - Bahnemann, D.W.
N1 - Funding Information: The authors would like to acknowledge Iran National Science Foundation (INSF) for the full financial support provided for this research work. This work is supported by Iran Nanotechnology Initiative Council. The authors also wish to thank Razi University-Iran for the equipped lab provided.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - In this work, novel triple metal-nonmetal doped TiO 2 (K-B-N-TiO 2) was synthesized by the sol–gel method. The structure and properties of the synthesized nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy. Photocatalytic activity of the nanoparticles was assessed by degradation of linear alkyl benzene (LAB) industrial wastewater at different operating conditions. The effects of initial pH, photocatalyst loading, initial COD concentration and reaction time on the photocatalytic performance of the nanoparticles degrading LAB wastewater were determined by response surface methodology (RSM). The region of examination for the process was taken as the area enclosed by initial COD concentration (200–500 mg/l), catalysis loading (1–2 g/l), initial pH (3–11) and reaction time (1–8 h). The doping modes reduced recombination of photogenerated electrons and holes, and extended the absorption of TiO 2 into the visible light. The photocatalyst properties of K-B-N-TiO 2 were more effective than those of pure TiO 2 and other modified single and double doped TiO 2 (B-N, K-N, N, B and K-TiO 2). The COD removal efficiencies by the photocatalysis were increased from pure TiO 2 to multi-doped TiO 2 in the following order; multi-doped TiO 2 > single-doped TiO 2 > pure TiO 2. More than 55% and 81% of COD content of the LAB industrial wastewater was mineralized under visible light and UV irradiation, respectively at optimum condition (COD of 200 mg/l, catalyst loading of 1.5 g/l and pH of 3). The BOD 5/COD ratio for the remaining COD was obtained to be about 0.4 which indicates higher biodegradability of the treated effluent in comparison with the raw wastewater.
AB - In this work, novel triple metal-nonmetal doped TiO 2 (K-B-N-TiO 2) was synthesized by the sol–gel method. The structure and properties of the synthesized nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy. Photocatalytic activity of the nanoparticles was assessed by degradation of linear alkyl benzene (LAB) industrial wastewater at different operating conditions. The effects of initial pH, photocatalyst loading, initial COD concentration and reaction time on the photocatalytic performance of the nanoparticles degrading LAB wastewater were determined by response surface methodology (RSM). The region of examination for the process was taken as the area enclosed by initial COD concentration (200–500 mg/l), catalysis loading (1–2 g/l), initial pH (3–11) and reaction time (1–8 h). The doping modes reduced recombination of photogenerated electrons and holes, and extended the absorption of TiO 2 into the visible light. The photocatalyst properties of K-B-N-TiO 2 were more effective than those of pure TiO 2 and other modified single and double doped TiO 2 (B-N, K-N, N, B and K-TiO 2). The COD removal efficiencies by the photocatalysis were increased from pure TiO 2 to multi-doped TiO 2 in the following order; multi-doped TiO 2 > single-doped TiO 2 > pure TiO 2. More than 55% and 81% of COD content of the LAB industrial wastewater was mineralized under visible light and UV irradiation, respectively at optimum condition (COD of 200 mg/l, catalyst loading of 1.5 g/l and pH of 3). The BOD 5/COD ratio for the remaining COD was obtained to be about 0.4 which indicates higher biodegradability of the treated effluent in comparison with the raw wastewater.
KW - LAB industrial wastewater
KW - Photocatalytic activity
KW - Photogenerated electron and hole
KW - Recombination rate
KW - Triple doped-TiO
KW - Visible light
UR - http://www.scopus.com/inward/record.url?scp=85036463566&partnerID=8YFLogxK
U2 - 10.1016/j.mssp.2017.11.040
DO - 10.1016/j.mssp.2017.11.040
M3 - Article
VL - 75
SP - 193
EP - 205
JO - Materials Science in Semiconductor Processing
JF - Materials Science in Semiconductor Processing
SN - 1369-8001
ER -