A Comparative Study of the Activity of TiO2 Degussa P25 and Millennium PCs in the Photocatalytic Degradation of Bromothymol Blue

2017 ◽  
Vol 16 (4) ◽  
Author(s):  
Nour Bouanimba ◽  
Nassima Laid ◽  
Razika Zouaghi ◽  
Tahar Sehili
Keyword(s):  
Photocatalytic Degradation ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Bromothymol Blue ◽  
Average Crystalline Size ◽  
Photocatalytic Activities ◽  
Degussa P25 ◽  
The Relationship

Abstract The photocatalytic activities of TiO2 Degussa P25 and Millennium PCs (PC50, PC100, PC105 and PC500) were evaluated by the photocatalytic degradation of Bromothymol Blue (BTB). The relationship between the photocatalytic reaction and the adsorption of BTB on the TiO2 catalysts at acidic, natural and basic mediums of pH was investigated. The crystalline phase, average crystalline size and surface area of the catalyst were found to have a significant influence on the adsorption and photocatalytic activity of the TiO2 samples. The mixed phase of anatase/rutile (Degussa P25) was found to be the most efficient photocatalytical material than pure phase anatase (Millennium PCs) and faster degradation is observed for PC500 compared to other Millennium PCs, this was attributed to the high surface area of PC500. Within the PC50, PC100 and PC105 series, the photocatalytic efficiency increased with the decrease of the surface area. The COD and TOC removals increased slowly, however, the decolorization ratio of BTB increased rapidly at the same time. Thereafter, the efficiency of P25 and PC500 were compared in presence of H2O2, Cl− and HCO3− at different mediums of pH. H2O2 was found to enhance strongly the BTB degradation in presence of P25 with an optimum at natural pH. In contrast, the reaction was inhibited in the presence of PC500, due to the inhibition of dye adsorption. At different pH, the BTB degradation has been significantly inhibited in the presence of the mixtures of HCO3−/H2O2. In contrast, the mixtures of Cl−/H2O2 accelerate the BTB degradation at acidic pH.

Facile and large-scale synthesis of poly(m-phenylenediamine) nanobelts with high surface area and superior dye adsorption ability

RSC Advances ◽  
2014 ◽  
Vol 4 (85) ◽  
pp. 45244-45250 ◽  
Author(s):  
Yun Meng ◽  
Liyuan Zhang ◽  
Liyuan Chai ◽  
Wanting Yu ◽  
Ting Wang ◽  
...  
Keyword(s):  
Surface Area ◽  
Large Scale ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
High Adsorption ◽  
Adsorption Ability ◽  
Adsorption Performance ◽  
Large Scale Synthesis

PmPD nanobelts with high adsorption performance have been synthesized by using CTAP as oxidants.

scholarly journals Microporous activated carbon developed from KOH activated biomass waste: surface mechanistic study of methylene blue dye adsorption

2021 ◽  
Author(s):  
Ali H. Jawad ◽  
Ahmed Saud Abdulhameed ◽  
Noor Nazihah Bahrudin ◽  
Nurul Nadiah Mohd Firdaus Hum ◽  
S. N. Surip ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Surface Area ◽  
Sugarcane Bagasse ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Type I ◽  
Order Kinetic ◽  
Bagasse Waste

Abstract In this work, sugarcane bagasse waste (SBW) was used as a lignocellulosic precursor to develop a high surface area activated carbon (AC) by thermal treatment of the SBW impregnated with KOH. This sugarcane bagasse waste activated carbon (SBWAC) was characterized by means of crystallinity, porosity, surface morphology and functional groups availability. The SBWAC exhibited Type I isotherm which corresponds to microporosity with high specific surface area of 709.3 m2/g and 6.6 nm of mean pore diameter. Further application of SBWAC as an adsorbent for methylene blue (MB) dye removal demonstrated that the adsorption process closely followed the pseudo-second order kinetic and Freundlich isotherm models. On the other hand, thermodynamic study revealed the endothermic nature and spontaneity of MB dye adsorption on SBWAC with high acquired adsorption capacity (136.5 mg/g). The MB dye adsorption onto SBWAC possibly involved electrostatic interaction, H-bonding and π-π interaction. This work demonstrates SBW as a potential lignocellulosic precursor to produce high surface area AC that can potentially remove more cationic dyes from the aqueous environment.

High Surface Area SnO2 -Ta2 O5 Composite for Visible Light-driven Photocatalytic Degradation of an Organic Dye

2018 ◽  
Vol 94 (4) ◽  
pp. 633-640 ◽  
Author(s):  
Bharath Velaga ◽  
Pradeep P. Shanbogh ◽  
Diptikanta Swain ◽  
Chandrabhas Narayana ◽  
Nalini G. Sundaram
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Organic Dye ◽  
Visible Light Driven

Experimental evidences of the relationship between reducibility and micro- and nanostructure in commercial high surface area ceria

2014 ◽  
Vol 479 ◽  
pp. 35-44 ◽  
Author(s):  
José M. Gatica ◽  
Diana M. Gómez ◽  
Juan C. Hernández-Garrido ◽  
José J. Calvino ◽  
Gustavo A. Cifredo ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
The Relationship

scholarly journals Visible light-induced photocatalytic degradation of gas-phase acetaldehyde with platinum/reduced titanium oxide-loaded carbon paper

RSC Advances ◽  
2017 ◽  
Vol 7 (80) ◽  
pp. 50693-50700 ◽  
Author(s):  
Soonhyun Kim ◽  
Minsun Kim ◽  
Ha-Young Lee ◽  
Jong-Sung Yu
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Gas Phase ◽  
Surface Area ◽  
Titanium Oxide ◽  
Visible Light Irradiation ◽  
High Surface ◽  
High Surface Area ◽  
Air Pollutant ◽  
Carbon Paper

A simply fabricated, high-surface-area substrate in a highly efficient photocatalyst for the degradation of air pollutant under visible light irradiation.

scholarly journals Preparation and Characterization of SnO2 / AC as a Novel High Surface Area Nanocatalyst

2021 ◽  
Author(s):  
Abdul Rahman Y. Wahoud ◽  
Salim F. Bamsaoud ◽  
Mohammed A. Al-Haiqi
Keyword(s):  
Surface Area ◽  
Pore Volume ◽  
Tin Dioxide ◽  
Design Method ◽  
Uv Spectroscopy ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Total Pore Volume ◽  
Solution Temperature

A new solid nanoparticle sorbent (SnO2 / AC) could serve as high surface area and inexpensive nanocatalyst was prepared. Many properties were characterized by SEM and UV spectroscopy. High surface area, large micro pore volume and total pore volume were found to be 571 m2 g−1, 0.4785 cm3 g−1 and 0.7267 cm3 g−1 respectively even with very high loaded ratio (60 %) of tin dioxide to Activated Carbon (SnO2 / AC). Taguchi factorial design method was used to get the maximum MB dye adsorption on the surface of SnO2 / AC nanoparticle sorbent. Contact time (60 min), initial dye concentration (5 mM) and solution temperature (293 K) were found to be the best conditions for the more effective absorption process.

Flower Buds Like MgO Nanoparticles: From Characterisation to Indigo Carmine Elimination

2018 ◽  
Vol 73 (11) ◽  
pp. 975-983 ◽  
Author(s):  
A. Modwi ◽  
L. Khezami ◽  
Kamal K. Taha ◽  
Hajo Idriss
Keyword(s):  
Surface Area ◽  
High Surface ◽  
Indigo Carmine ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Nitrogen Adsorption ◽  
Magnesium Carbonate ◽  
Flower Buds ◽  
X Ray ◽  
Pseudo Second Order

AbstractHere, we demonstrate a pyrolysis route for the synthesis of flower buds like magnesium oxide nanoparticles using a magnesium carbonate precursor without additional chemicals. The effect of heating at different time intervals upon the structure and morphology of the acquired nanostructures were investigated via X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis and Fourier transformation infrared spectroscopy. Nitrogen adsorption was employed to study its porosity. The obtained data confirmed the formation of target nanoparticles that exhibited increasing sizes as pyrolysis time was lengthened. As a consequence a high surface area up to 27 m2 g−1 was recorded for the sample heated for 1 h duration. Furthermore, Indigo Carmine dye adsorption was carried out using the largest surface area species which showed an adsorption capacity of 158 mg g−1. The adsorption was found to comply with the Langmuir isotherm and it follows the pseudo-second-order kinetics. The diffusion process showed intra-particle along with film diffusion mode.

scholarly journals Synthesis and characterization of a novel CNT-FeNi3/DFNS/Cu(ii) magnetic nanocomposite for the photocatalytic degradation of tetracycline in wastewater

RSC Advances ◽  
2019 ◽  
Vol 9 (60) ◽  
pp. 35022-35032 ◽  
Author(s):  
Yanhua Zhao ◽  
Jie Juan Tang ◽  
Alireza Motavalizadehkakhky ◽  
Saeid Kakooei ◽  
Seyed Mohsen Sadeghzadeh
Keyword(s):  
Photocatalytic Degradation ◽  
Surface Area ◽  
Active Sites ◽  
High Surface ◽  
High Surface Area ◽  
Magnetic Nanocomposite ◽  
Synthesis And Characterization

Herein, Cu(ii) complexes were anchored within the nanospaces of a magnetic fibrous silicate with a high surface area and easily accessible active sites via a facile approach, leading to the successful synthesis of a novel potent nanocatalyst (FeNi3/DFNS/Cu).

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