Details
| Original language | English |
|---|---|
| Pages (from-to) | 43-54 |
| Number of pages | 12 |
| Journal | Journal of hazardous materials |
| Volume | 307 |
| Early online date | 28 Dec 2015 |
| Publication status | Published - 15 Apr 2016 |
Abstract
Herein, we report the ease synthesis of mesoporous WO 3-TiO 2 nanocomposites at different WO 3 contents (0-5wt%) together with their photocatalytic performance for the degradation of the imazapyr herbicide under visible light and UV illumination. XRD and Raman spectra indicated that the highly crystalline anatase TiO 2 phase and monoclinic and triclinic of WO 3 were formed. The mesoporous TiO 2 exhibits large pore volumes of 0.267cm 3g-1 and high surface areas of 180m 2g -1 but they become reduced to 0.221cm 3g -1 and 113m 2g -1, respectively upon WO 3 incorporation, with tunable mesopore diameter in the range of 5-6.5nm. TEM images show WO 3-TiO 2 nanocomposites are quite uniform with 10-15nm of TiO 2 and 5-10nm of WO 3 sizes. Under UV illumination, the overall photocatalytic efficiency of the 3% WO 3-TiO 2 nanocomposite is 3.5 and 6.6 times higher than that of mesoporous TiO 2 and commercial UV-100 photocatalyst, respectively. The 3% WO 3-TiO 2 nanocomposite is considered to be the optimum photocatalyst which is able to degrade completely (100% conversion) of imazapyr herbicide along 120min with high photonic efficiency ~8%. While under visible light illumination, the 0.5% WO 3-TiO 2 nanocomposite is the optimum photocatalyst which achieves 46% photocatalytic efficiency.
Keywords
- Imazapyr, Mesoporous, Photocatalyst, UV and visible light illumination, WO -TiO
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Engineering
- Environmental Science(all)
- Environmental Chemistry
- Environmental Science(all)
- Waste Management and Disposal
- Environmental Science(all)
- Pollution
- Environmental Science(all)
- Health, Toxicology and Mutagenesis
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In: Journal of hazardous materials, Vol. 307, 15.04.2016, p. 43-54.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ease synthesis of mesoporous WO3–TiO2 nanocomposites with enhanced photocatalytic performance for photodegradation of herbicide imazapyr under visible light and UV illumination
AU - Ismail, A.A.
AU - Abdelfattah, I.
AU - Helal, A.
AU - Al-Sayari, S.A.
AU - Robben, L.
AU - Bahnemann, D.W.
N1 - Publisher Copyright: © 2015 Elsevier B.V.. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016/4/15
Y1 - 2016/4/15
N2 - Herein, we report the ease synthesis of mesoporous WO 3-TiO 2 nanocomposites at different WO 3 contents (0-5wt%) together with their photocatalytic performance for the degradation of the imazapyr herbicide under visible light and UV illumination. XRD and Raman spectra indicated that the highly crystalline anatase TiO 2 phase and monoclinic and triclinic of WO 3 were formed. The mesoporous TiO 2 exhibits large pore volumes of 0.267cm 3g-1 and high surface areas of 180m 2g -1 but they become reduced to 0.221cm 3g -1 and 113m 2g -1, respectively upon WO 3 incorporation, with tunable mesopore diameter in the range of 5-6.5nm. TEM images show WO 3-TiO 2 nanocomposites are quite uniform with 10-15nm of TiO 2 and 5-10nm of WO 3 sizes. Under UV illumination, the overall photocatalytic efficiency of the 3% WO 3-TiO 2 nanocomposite is 3.5 and 6.6 times higher than that of mesoporous TiO 2 and commercial UV-100 photocatalyst, respectively. The 3% WO 3-TiO 2 nanocomposite is considered to be the optimum photocatalyst which is able to degrade completely (100% conversion) of imazapyr herbicide along 120min with high photonic efficiency ~8%. While under visible light illumination, the 0.5% WO 3-TiO 2 nanocomposite is the optimum photocatalyst which achieves 46% photocatalytic efficiency.
AB - Herein, we report the ease synthesis of mesoporous WO 3-TiO 2 nanocomposites at different WO 3 contents (0-5wt%) together with their photocatalytic performance for the degradation of the imazapyr herbicide under visible light and UV illumination. XRD and Raman spectra indicated that the highly crystalline anatase TiO 2 phase and monoclinic and triclinic of WO 3 were formed. The mesoporous TiO 2 exhibits large pore volumes of 0.267cm 3g-1 and high surface areas of 180m 2g -1 but they become reduced to 0.221cm 3g -1 and 113m 2g -1, respectively upon WO 3 incorporation, with tunable mesopore diameter in the range of 5-6.5nm. TEM images show WO 3-TiO 2 nanocomposites are quite uniform with 10-15nm of TiO 2 and 5-10nm of WO 3 sizes. Under UV illumination, the overall photocatalytic efficiency of the 3% WO 3-TiO 2 nanocomposite is 3.5 and 6.6 times higher than that of mesoporous TiO 2 and commercial UV-100 photocatalyst, respectively. The 3% WO 3-TiO 2 nanocomposite is considered to be the optimum photocatalyst which is able to degrade completely (100% conversion) of imazapyr herbicide along 120min with high photonic efficiency ~8%. While under visible light illumination, the 0.5% WO 3-TiO 2 nanocomposite is the optimum photocatalyst which achieves 46% photocatalytic efficiency.
KW - Imazapyr
KW - Mesoporous
KW - Photocatalyst
KW - UV and visible light illumination
KW - WO -TiO
UR - http://www.scopus.com/inward/record.url?scp=84954305971&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2015.12.041
DO - 10.1016/j.jhazmat.2015.12.041
M3 - Article
VL - 307
SP - 43
EP - 54
JO - Journal of hazardous materials
JF - Journal of hazardous materials
SN - 0304-3894
ER -