PMID- 29264852
OWN - NLM
STAT- MEDLINE
DCOM- 20190118
LR  - 20190118
IS  - 1614-7499 (Electronic)
IS  - 0944-1344 (Linking)
VI  - 25
IP  - 35
DP  - 2018 Dec
TI  - Photocatalytic degradation of the herbicide chloridazon on mesoporous 
      titania/zirconia nanopowders.
PG  - 34873-34883
LID - 10.1007/s11356-017-1023-x [doi]
AB  - Advanced oxidation processes using semiconducting photocatalysts for the 
      degradation of organic pollutants are a promising approach for the remediation of 
      pesticide-contaminated wastewater. High photodegradation efficiency and stability 
      of the photocatalyst are of key importance for practical application of the 
      semiconductor. In this study, mesoporous TiO(2)/ZrO(2) nanopowders were 
      synthesized via two techniques; evaporation-induced self-assembly (EISA) and 
      sol-gel using triblock copolymers Pluronic P123 and F127. The photodegradation 
      activities of the composites were determined by employing the herbicide 
      chloridazon as a model compound. Due to well-developed mesoporosity, the 
      TiO(2)/ZrO(2) nanocomposite synthesized by EISA displays high surface area and 
      small crystallite sizes leading to higher photocatalytic activity than pristine 
      TiO(2) prepared under similar condition and commercial Degussa P25 nanopowder. 
      The optimum amount of zirconium required for the highest activities was 
      identified and found to be 0.14 and 0.05 mol% for the EISA and sol-gel-prepared 
      samples, respectively. Systematic studies of the post-thermal treatment step for 
      both samples show that Zr inhibits an anatase-to-rutile phase transition only up 
      to 600  degrees C, at higher temperature phase separation occurs. Samples synthesized by 
      EISA method showed enhanced degradation activity than sol-gel-synthesized 
      samples.
FAU - Mbiri, Anne
AU  - Mbiri A
AD  - Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129, 
      Oldenburg, Germany.
AD  - Pure and applied Sciences, Technical University of Mombasa, 90420, Mombasa, 
      80100, Kenya.
FAU - Wittstock, Gunther
AU  - Wittstock G
AD  - Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129, 
      Oldenburg, Germany.
FAU - Taffa, Dereje H
AU  - Taffa DH
AD  - Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129, 
      Oldenburg, Germany. dereje.hailu.taffa@uni-oldenburg.de.
FAU - Gatebe, Erastus
AU  - Gatebe E
AD  - Department of Chemistry, Jomo Kenyatta University of Agriculture and Technology, 
      62000, Nairobi, 00200, Kenya.
FAU - Baya, Joseph
AU  - Baya J
AD  - Pure and applied Sciences, Technical University of Mombasa, 90420, Mombasa, 
      80100, Kenya.
FAU - Wark, Michael
AU  - Wark M
AD  - Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129, 
      Oldenburg, Germany.
LA  - eng
GR  - 57129430/Deutscher Akademischer Austauschdienst/
PT  - Journal Article
DEP - 20171220
PL  - Germany
TA  - Environ Sci Pollut Res Int
JT  - Environmental science and pollution research international
JID - 9441769
RN  - 0 (Herbicides)
RN  - 0 (Pyridazines)
RN  - 15FIX9V2JP (titanium dioxide)
RN  - 26X5RK7X7W (pyrazon)
RN  - C6V6S92N3C (Zirconium)
RN  - D1JT611TNE (Titanium)
RN  - S38N85C5G0 (zirconium oxide)
SB  - IM
MH  - Catalysis
MH  - Herbicides/*chemistry
MH  - Models, Chemical
MH  - Nanocomposites/*chemistry
MH  - Oxidation-Reduction
MH  - Phase Transition
MH  - *Photochemical Processes
MH  - Photolysis
MH  - Pyridazines/*chemistry
MH  - Titanium/*chemistry
MH  - Zirconium
OTO - NOTNLM
OT  - Herbicide chloridazon
OT  - Oxidation processes
OT  - Photocatalytic degradation
OT  - Water treatment
EDAT- 2017/12/22 06:00
MHDA- 2019/01/19 06:00
CRDT- 2017/12/22 06:00
PHST- 2017/08/18 00:00 [received]
PHST- 2017/12/11 00:00 [accepted]
PHST- 2017/12/22 06:00 [pubmed]
PHST- 2019/01/19 06:00 [medline]
PHST- 2017/12/22 06:00 [entrez]
AID - 10.1007/s11356-017-1023-x [pii]
AID - 10.1007/s11356-017-1023-x [doi]
PST - ppublish
SO  - Environ Sci Pollut Res Int. 2018 Dec;25(35):34873-34883. doi: 
      10.1007/s11356-017-1023-x. Epub 2017 Dec 20.