scholarly journals Synthesis and Characterization of TiO2 Nanoparticles Doping on Cellulose as Adsorbent for Removal of Rhodamine B in Aqueous Solution

2021 ◽  
Vol 2 (1) ◽  
pp. 45-54
Author(s):  
Allwar Allwar ◽  
Mayla Nur Fatima ◽  
Bayu Wiyantoko
Keyword(s):  
Aqueous Solution ◽  
Tio2 Nanoparticles ◽  
Rhodamine B ◽  
Potassium Hydroxide ◽  
Graphite Furnace ◽  
Hydrothermal Process ◽  
Banana Fruit ◽  
Solution Kinetic ◽  
Cellulose Adsorbent

Cellulose from banana fruit bunch was used as a precursor for doping titanium oxide (TiO2) in producing of TiO2/cellulose adsorbent.  Cellulose was obtained by chemical impregnation using potassium hydroxide (KOH) and followed by the hydrothermal process at 250oC for 5 h. The mixture of TiO2 nanoparticles and cellulose was carried out into hydrothermal reactor under de-ionized water and ethanol and heated up to 200oC for 4 h in graphite furnace. Surface morphology analysis showed that the TiO2 clearly immobilized on the surface of cellulose with an increasing roughness of surface and irregular size of porosity. The development of the amorphous to the crystalline phase of TiO2/cellulose was clearly observed by the XRD. The effectiveness of TiO2/cellulose for removal of rhodamine B was investigated from different parameters of adsorption in aqueous solution. Kinetic models were well described by the pseudo-first and second-order with the best correlation coefficient (R2) attributing to the occurrence of chemisorption and physisorption mechanism.

scholarly journals Synthesis and Characterization of TiO2/Natural Fiber from Banana Fruit Bunch Waste for Removal of Rhodamine-B in Aqueous Solution

2019 ◽  
Author(s):  
Allwar Allwar
Keyword(s):  
Aqueous Solution ◽  
Correlation Coefficient ◽  
Rhodamine B ◽  
Potassium Hydroxide ◽  
Natural Fiber ◽  
Hydrothermal Process ◽  
Natural Fibers ◽  
Freundlich Isotherm ◽  
Banana Fruit

Indonesia is one of the largest banana producing countries in the world remaining abundance solid waste of banana fruit bunch. The banana fruit bunch contains high natural fibers which were obtained by an impregnation process using potassium hydroxide (KOH) and followed by a carbonization process under steam at 250°C for 5 h. The nanomaterial of TiO2/fibre was prepared by a hydrothermal process at 200°C for 4 h. Surface morphology proved that the TiO2 was loaded into the fibre by an increasing roughness of the surface and irregular size of porosity. The development of amorphous to crystalline phase of TiO2/fibre was clearly observed. The effectiveness of TiO2/fibre for removal of rhodamine B was investigated from different parameters of adsorptions in aqueous solution. The equilibrium adsorptions show that the Langmuir and Freundlich isotherm exhibited the best correlation coefficient (R2 > 0.94) relating to the chemisorption and physisorption interaction in the adsorption process. Kinetic models were well described by the pseudo-first and second-order with the best correlation coefficient (R2 > 0.99). These results indicate that nanomaterial TiO2/fibre can be used as an effective adsorbent for removal of rhodamine B in aqueous solution.

scholarly journals Preparation and Characterization of Reduced Graphene Oxide/Titanium Dioxide Composites by Hydrothermal Method

2019 ◽  
Vol 4 (9) ◽  
pp. 165-173
Author(s):  
Guillermo A Santamaría Juárez ◽  
Estela Gómez Barojas ◽  
Enrique Quiroga-González ◽  
Enrique Sánchez-Mora ◽  
Juana Deisy Santamaría-Juárez
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Tio2 Nanoparticles ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Hydrothermal Process ◽  
Xps Spectra ◽  
Industrial Batch ◽  
Reduced Graphene

In the present work, reduced graphene oxide/Titanium dioxide (rGO/TiO2) composites (1:1 and 1:2 wt %) have been synthesized by the hydrothermal method using graphene oxide (GO) and commercial TiO2 as precursors. Previously, we prepared the GO, in the way optimizing and making safer, the Hummers route. We have chosen the hydrothermal method to prepare the composites because it offers several advantages: 1) It consist of a very simple experimental setup, 2) it utilizes only water, instead of Hydrazine or Sulfonate used as chemical reductants in traditional methods, avoiding the incorporation of un-willing impurities into GO sheets, 3) the temperature and pressure condition reached in the closed hydrothermal system have promoted the recovery of π-conjugation after dehydration diminishing defects concentration and increasing the degree of reduction of the GO sheets, and 4) this system is compatible with industrial batch production. The structure, surface morphology, chemical composition and optical properties of GO, TiO2 and rGO/TiO2 composites have been analyzed using, TEM, FTIR, Raman- and XPS-spectroscopy. TEM micrographs show that the TiO2 nanoparticles are non-homogenously adsorbed onto the GO sheets. FTIR spectra of the rGO/TiO2 composites suggest that during the hydrothermal process the GO sheets get reduced. Raman spectra suggest that TiO2 remains with anatase structure even after the hydrothermal process. The C 1s XPS spectra of the rGO/TiO2 composites have shown a significant decrease of oxygenated carbon related signals, confirming that most of the oxygenated groups were successfully removed. Based on these characterization results we infer that, GO sheets of good quality have been successfully synthesized and the GO sheets have been partially reduced via the TiO2 nanoparticles anchored during the hydrothermal process.

scholarly journals Retracted Article: Synthesis and characterization of Mn/Co/Ti LDH and its utilization as a photocatalyst in visible light assisted degradation of aqueous Rhodamine B

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112016-112034 ◽  
Author(s):  
Priyadarshi Roy Chowdhury ◽  
Krishna G. Bhattacharyya
Keyword(s):  
Aqueous Solution ◽  
Visible Light ◽  
Rhodamine B ◽  
Synthesis And Characterization ◽  
Retracted Article

Mn/Co/Ti LDH, hydrothermally synthesized, has been found to be optically responsive and could be used as an efficient photocatalyst for destruction of the dye, Rhodamine B, in aqueous solution irradiated by visible light.

Auto-combustion fabrication and characterization of TiO2 nanoparticles and utilization as adsorbent for removal Pb2+ from aqueous solution

2020 ◽  
Vol 193 ◽  
pp. 83-94
Author(s):  
Ayman A. Ali ◽  
Esraa M. Elfiky ◽  
Ibrahim S. Ahmed ◽  
Ahmed A. Khalil ◽  
Talaat Y. Mohamed
Keyword(s):  
Aqueous Solution ◽  
Tio2 Nanoparticles ◽  
Auto Combustion ◽  
Fabrication And Characterization
Sign in / Sign up

Export Citation Format

Share Document