Photocatalytic degradation of Amaranth and Brilliant Blue FCF dyes using in situ modified tungsten doped TiO2 hybrid nanoparticles

Abstract

This study focuses on the process of photocatalytic degradation of popular dyes like Amaranth and Brilliant Blue, using reagent grade TiO 2 and in situ modified tungsten doped TiO 2 hybrid nanoparticles. One of the drawbacks of nanoparticles is their agglomeration and poor dispersion in the medium as well as their limited activity in the ultra violet region, which makes them less efficient. In order to overcome such drawbacks, for the first time, in situ surface modification and doping of TiO 2 nanoparticles were carried out employing n-butylamine as surface modifier and tungsten oxide as dopant. Modification was conducted under mild hydrothermal conditions (T = 150 1C, P = autogenous). Nanoparticles obtained were characterized using Powder XRD, FTIR, DLS, Zeta potential, UV-Vis spectroscopy, and TEM. The characterization indicated the desired results with respect to morphology, particle size distribution and less agglomeration. The results of the process of photodegradation of Brilliant Blue FCF and Amaranth dyes showed a higher efficiency for in situ modified tungsten doped TiO 2 hybrid nanoparticles than for reagent grade TiO 2 .

Green Synthesis of Biogenic Silver Nanoparticles for Efficient Catalytic Removal of Harmful Organic Dyes

“…Taking into account that using silver nanoparticles as catalysts of the degradation reactions of the above mentioned dyes, Tz concentration lowered by 26% after 45 min of reaction and 97% of BB was removed after 15 min, is highly recommended to use the catalytic degradation of these dyes instead of their UV light mediated oxidation. The photocatalytic degradation of BB was also investigated in the presence of in situ modified tungsten doped TiO 2 hybrid nanoparticles [48], but this nanocatalyst also proved to be less efficient compared to Viburnum opulus mediated synthesized AgNPs. The determined degradation rate constant obtained in the presence of TiO 2 nanoparticles was 0.075 min −1 , while the presence of the biogenic silver nanocatalyst accelerated the degradation of BB, the calculate rate constant being almost three folds higher (0.2097 min −1 ).…”

Investigation of equilibrium, kinetics and thermodynamics of extracted chitin from shrimp shell in reactive blue 29 (RB-29) removal from aqueous solutions

“…Colored wastewater also may cause operational problems in treatment plants such as foaming and stable color formation, increase in pH, temperature and heavy metals [15]. Various methods such as, coagulation, flocculation, membrane filtration, enzymatic process and adsorption are used for dyes removal from aqueous solutions [16][17][18][19][20][21][22]. Conventional anaerobic wastewater treatment methods cannot remove dyes efficiently [23].…”

Sonochemical degradation of pesticides in aqueous solution: investigation on the influence of operating parameters and degradation pathway – a systematic review

“…Titanium dioxide is the most widely accepted photocatalyst for such treatments owing to some of its unique advantages including low cost, commercial availability, stability, harmlessness, non-toxic and high efficiency. 69,92,93 Compared to individual processes, sonophotocatalysis provides numerous advantages such as improvement penetrating ability of light, enhancement of aggregation of catalyst particles, keeping particle in oating condition and acceleration of the splitting of H 2 O 2 to form more HOc and HO 2 free radicals. In addition, ultrasound irradiation increases the catalyst surface due to reducing particle size and continuously cleans the photocatalyst surface during the operation.…”