Efiicient degradation of 4-chloro-2-nitrophenol using photocatalytic ozonation with nano-zinc oxide impregnated granular activated carbon (ZnO–GAC)

2017 ◽  
Vol 93 ◽  
pp. 145-151 ◽  
Author(s):  
Hossein Arfaeinia ◽  
Hooshmand Sharafi ◽  
Masoud Moradi ◽  
Mojtaba Ehsanifar ◽  
Seyed Enayat Hashemi
Keyword(s):  
Zinc Oxide ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Photocatalytic Ozonation ◽  
Nano Zinc Oxide ◽  
Nano Zinc

scholarly journals Physical-chemical Characterization of Nano-Zinc Oxide/Activated Carbon Composite for Phenol Removal from Aqueous Solution

2021 ◽  
Vol 16 (1) ◽  
pp. 136-147
Author(s):  
Allwar Allwar ◽  
Asih Setyani ◽  
Ulul Sugesti ◽  
Khusna Afifah Fauzani
Keyword(s):  
Zinc Oxide ◽  
Activated Carbon ◽  
Correlation Coefficient ◽  
Oil Palm ◽  
Nitrogen Adsorption ◽  
Phenol Removal ◽  
Peak Intensity ◽  
Oil Palm Shell ◽  
Nano Zinc Oxide ◽  
Nano Zinc

Oil palm shell was used as a precursor for preparation of activated carbon using different chemical activations (potassium hydroxide (KOH), zinc chloride (ZNCl2), and phosphoric acid (H3PO4)). Each activated carbons (AC) was mixed with nano-zinc oxide to form a composite. From the gas sorption analyzer, it is showed that nitrogen adsorption isotherms show Type II for ZnO/AC-KOH and ZnO/AC-ZnCl2 corresponding to the micro- and mesoporous structures, respectively. However, the nitrogen adsorption isotherm of ZnO/AC-H3PO4 exhibits the Type I with predominantly microporous structures. The SEM micrographs produced unsmooth surface and different pore sizes. The XRD patterns at 2θ of 25.06° and 26.75° were come from amorphous activated carbon. The peak intensity of ZnO was weak due to low concentration of zinc precursor. However, the ZnO of ZnO/AC-ZnCl2 showed strongly peak intensity. The effectiveness of the composites was examined for phenol removal determined by UV-Vis Spectrophotometer method. The equilibrium adsorption follows the Langmuir and Freundlich models according to the best correlation coefficient (R2). The kinetic model was only obtained for the pseudo-second-order with the best linearity of the correlation coefficient (R2). The results of this study showed that the oil palm shell has a great potential for ZnO/AC with excellent adsorptive property. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

Effect of Calcination on the Basic Strength of Surface Modified Nano-Zinc Oxide Characterised by FTIR and Back Titration Methods

2015 ◽  
Vol 1107 ◽  
pp. 326-332
Author(s):  
Abdul Rahim Yacob ◽  
Kamaluddeen Suleiman Kabo
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Base Catalysis ◽  
Nano Zinc Oxide ◽  
Back Titration ◽  
And Performance ◽  
Nano Zinc ◽  
Surface Modified ◽  
Heterogeneous Base ◽  
Basic Strength

The use of metal oxides in heterogeneous base catalysis has gained a large interest due to their application in many chemical and industrial processes and is environmental friendly. Basic metal oxides are commonly used and their structures, morphology and performance can be modified by method of preparation and thermal activation. In this study, surface modified amphoteric zinc oxide was prepared via hydration-dehydration method and characterised by TGA and FTIR. The basic strength at various temperatures is characterised by FTIR and back titration analyses. The results shows that surface modified zinc oxide has the highest basic strength of 1.453mmolg-1at 400°C making it a relatively good and suitable compound for use in heterogeneous basic catalysis. This result is also supported by FTIR spectra which show possible relationship between the Lewis O2-and increasing basic strength.

Study on the Viscosity and Dispersion Stability of AA-AMPS Copolymer on Nano Zinc Oxide

2014 ◽  
Vol 692 ◽  
pp. 288-291
Author(s):  
Yue Long Liu ◽  
Jia Liu
Keyword(s):  
Zinc Oxide ◽  
Radical Polymerization ◽  
Polyacrylic Acid ◽  
Sulfonic Acid ◽  
Dispersion Stability ◽  
Polymerization Process ◽  
Mass Ratio ◽  
Nano Zinc Oxide ◽  
Nano Zinc

The copolymer of sodium polyacrylic acid and 2-acrylamide-2-methyl propane sulfonic acid (AMPS) was prepared by radical polymerization process, the effect of mass ratio of AA/AMPS on the viscosity of AA-AMPS copolymer were investigated. Results showed that when the mole ratio of AA/AMPS was 3:1, it had the least viscosity. The dispersion stability of synthesized AA-AMPS copolymer for nanozinc oxide was tested.

Basic zinc carbonate as a precursor in the solvothermal synthesis of nano-zinc oxide

2015 ◽  
Vol 86 ◽  
pp. 347-353 ◽  
Author(s):  
Alojz Anžlovar ◽  
Marjan Marinšek ◽  
Zorica Crnjak Orel ◽  
Majda Žigon
Keyword(s):  
Zinc Oxide ◽  
Solvothermal Synthesis ◽  
Zinc Carbonate ◽  
Nano Zinc Oxide ◽  
Nano Zinc
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