Novel hierarchical TiO2@ZIF-8 for photodecolorization of semi-real sample bromothymol blue aqueous solution

A TiO 2 @ZIF-8 hierarchical structure built up of a well-ordered array was achieved by an easy handling of Zn(NO 3 ) 2 ·6H 2 O, 2-methylimidazole and TiO 2 mixture in DMF with solvothermal behavior. It is believed that solvothermal cause to the driving force for the accomplished TiO 2 rod to self-as...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the Iranian Chemical Society 2019-01, Vol.16 (1), p.1-9
Main Authors: Fazaeli, Razieh, Aliyan, Hamid
Format: Article
Language:English
Subjects:
Ammonia
Analytical Chemistry
Aqueous solutions
Biochemistry
Catalysis
Chemistry
Chemistry and Materials Science
Crystal growth
Decoloring
Dyes
Inorganic Chemistry
Nucleation
Organic Chemistry
Original Paper
Physical Chemistry
Reaction kinetics
Structural hierarchy
Substrates
Titanium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A TiO 2 @ZIF-8 hierarchical structure built up of a well-ordered array was achieved by an easy handling of Zn(NO 3 ) 2 ·6H 2 O, 2-methylimidazole and TiO 2 mixture in DMF with solvothermal behavior. It is believed that solvothermal cause to the driving force for the accomplished TiO 2 rod to self-assemble into ZIF-8, which performed as the substrate for secondary heterogeneous nucleation, and afterwards the crystal growth happened into development of a TiO 2 @ZIF-8 rod arrangement. The TiO 2 @ZIF-8 hierarchical rod array structure was characterized by FTIR, XRD, SEM, EDX, ICP, DRS, TG, NH 3 –TPD and BET and employed as photocatalyst for photodecolorization of bromothymol blue (BTB) aqueous solution under Hg lamp irradiation. The optimum values of the experimental parameters which affect the decolorization efficiency were attained as: 0.1 g L −1 of the 7% TiO 2 @ZIF-8.30 ppm dye concentration and pH 6.5. The decolorization kinetics was fitted well to the Langmuir–Hinshelwood first-order rate law. It was found that the catalyst displayed significantly high catalytic stability, and the activity loss is appearing after four BTB decolorization cycles. Graphical abstract
ISSN:1735-207X
1735-2428
DOI:10.1007/s13738-018-1475-z