Details
| Original language | English |
|---|---|
| Pages (from-to) | 66-73 |
| Number of pages | 8 |
| Journal | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume | 367 |
| Early online date | 16 Aug 2018 |
| Publication status | Published - 1 Dec 2018 |
Abstract
The photocatalytic activity of the mesoporous TiO 2 nanoparticles for the photooxidation of different pollutants molecules such as methylene blue dye (MB), methanol, imazapyr, and phenol were evaluated and compared to that of the commercial photocatalysts either Aeroxide TiO 2 P-25 or Hombikat UV-100. The XRD and nitrogen isotherm results of mesoporous TiO 2 confirmed that TiO 2 nanocrystals with anatase phase were obtained and they possess large pore volume and high surface area of 0.29 cm 3 g −1 and of 162 m 2 g −1, respectively. The photocatalytic efficiency of mesoporous TiO 2 is 100% for all employed pollutants molecules, however it reduced to 60–80% and 40–60% using Aeroxide TiO 2 P-25 and Hombikat UV-100, respectively. The initial photodegradation rate of the pollutants molecules over mesoporous TiO 2 is higher 2 and 3–6 times than that Aeroxide TiO 2 P-25 and Hombikat UV-100, respectively. The enhancement of mesoporous TiO 2 is explained by easy diffusion of pollutants molecules into TiO 2 pores, minimize light scattering and excess •OH accumulated concentration into pores. The mesoporous TiO 2 nanoparticles possesses the transport characteristics of pollutants molecules involved in the photocatalytic reaction and, thus, promote the comprehensive photocatalytic activity.
Keywords
- Commercial TiO, Mesoporous TiO, Organic pollutants, Photooxidation
ASJC Scopus subject areas
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In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 367, 01.12.2018, p. 66-73.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A comparative study on mesoporous and commercial TiO2 photocatalysts for photodegradation of organic pollutants
AU - Mohamed, R.M.
AU - Ismail, A.A.
AU - Kadi, M.W.
AU - Bahnemann, D.W.
N1 - Funding information: This Project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University , Jeddah, under grant no. RG-18-130-38 . The authors, therefore, acknowledge with thanks DSR for technical and financial support.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - The photocatalytic activity of the mesoporous TiO 2 nanoparticles for the photooxidation of different pollutants molecules such as methylene blue dye (MB), methanol, imazapyr, and phenol were evaluated and compared to that of the commercial photocatalysts either Aeroxide TiO 2 P-25 or Hombikat UV-100. The XRD and nitrogen isotherm results of mesoporous TiO 2 confirmed that TiO 2 nanocrystals with anatase phase were obtained and they possess large pore volume and high surface area of 0.29 cm 3 g −1 and of 162 m 2 g −1, respectively. The photocatalytic efficiency of mesoporous TiO 2 is 100% for all employed pollutants molecules, however it reduced to 60–80% and 40–60% using Aeroxide TiO 2 P-25 and Hombikat UV-100, respectively. The initial photodegradation rate of the pollutants molecules over mesoporous TiO 2 is higher 2 and 3–6 times than that Aeroxide TiO 2 P-25 and Hombikat UV-100, respectively. The enhancement of mesoporous TiO 2 is explained by easy diffusion of pollutants molecules into TiO 2 pores, minimize light scattering and excess •OH accumulated concentration into pores. The mesoporous TiO 2 nanoparticles possesses the transport characteristics of pollutants molecules involved in the photocatalytic reaction and, thus, promote the comprehensive photocatalytic activity.
AB - The photocatalytic activity of the mesoporous TiO 2 nanoparticles for the photooxidation of different pollutants molecules such as methylene blue dye (MB), methanol, imazapyr, and phenol were evaluated and compared to that of the commercial photocatalysts either Aeroxide TiO 2 P-25 or Hombikat UV-100. The XRD and nitrogen isotherm results of mesoporous TiO 2 confirmed that TiO 2 nanocrystals with anatase phase were obtained and they possess large pore volume and high surface area of 0.29 cm 3 g −1 and of 162 m 2 g −1, respectively. The photocatalytic efficiency of mesoporous TiO 2 is 100% for all employed pollutants molecules, however it reduced to 60–80% and 40–60% using Aeroxide TiO 2 P-25 and Hombikat UV-100, respectively. The initial photodegradation rate of the pollutants molecules over mesoporous TiO 2 is higher 2 and 3–6 times than that Aeroxide TiO 2 P-25 and Hombikat UV-100, respectively. The enhancement of mesoporous TiO 2 is explained by easy diffusion of pollutants molecules into TiO 2 pores, minimize light scattering and excess •OH accumulated concentration into pores. The mesoporous TiO 2 nanoparticles possesses the transport characteristics of pollutants molecules involved in the photocatalytic reaction and, thus, promote the comprehensive photocatalytic activity.
KW - Commercial TiO
KW - Mesoporous TiO
KW - Organic pollutants
KW - Photooxidation
UR - http://www.scopus.com/inward/record.url?scp=85051679603&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2018.08.019
DO - 10.1016/j.jphotochem.2018.08.019
M3 - Article
VL - 367
SP - 66
EP - 73
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
ER -