Nanophotocatalytic treatment of seawater using TiO2 immobilized and suspension system under solar irradiation

Joy, Varghese Manappallil; Dutta, Susmita; Shaik, Feroz; Devi, M. Geetha

doi:10.1016/j.jwpe.2021.102263

Cited by 8 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the characteristics of low cost, high chemical stability and optical stability, and no secondary pollution, the photocatalytic technology represented by TiO 2 is considered as a desirable method to deal with environmental pollution and an important way to solve the global energy crisis [ 10 , 11 ]. However, as a single component oxide, TiO 2 still has some problems in practical application.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Tetracycline on SiO2-TiO2-C Aerogel Photocatalysts under Visible Light

2022

View full text Add to dashboard Cite

SiO2-TiO2-C aerogel photocatalysts with different carbon loadings were synthesized by using sol-gel chemistry. The anatase crystal and nonmetal carbon dopant were introduced during the sol preparation and formed by hydrothermal treatment, which can simultaneously enhance the adsorption ability and visible light photo-activity. A high surface area (759 g cm−3) SiO2-TiO2-C aerogel composite can remove up to 80% tetracycline hydrochloride within 180 min under visible light. The characterization of the gel structures shows that the homogeneous dispersion of O, Si, Ti and C in the skeleton, indicating that hydrothermal synthesis could provide a very feasible way for the preparation of composite materials. n(C):n(Ti) molar ratio of 3.5 gives the best catalytic performance of the hybrid aerogel, and the cyclic test still confirms over 60% degradation activity after seven use cycles. All catalysis reaction followed the pseudo-first-order rate reaction with high correlation coefficient. The electrons and holes in the compound could be effectively restrained with doping proper amount of C, and ESR results indicate that the oxidation process was dominated by the hydroxyl radical (•OH) and superoxide radical (•O2−) generated in the system.

show abstract

Section: Introductionmentioning

confidence: 99%

Degradation of Tetracycline on SiO2-TiO2-C Aerogel Photocatalysts under Visible Light

2022

View full text Add to dashboard Cite

show abstract

Artificial intelligence‐based multiobjective optimization of reverse osmosis desalination pretreatment using a hybrid ZnO‐immobilized/photo‐Fenton process

Joy

Shaik

Dutta

2022

Journal of Chemometrics

Self Cite

View full text Add to dashboard Cite

The performance of desalination plants predominantly depends on the enhancement of membrane productivity through the effective removal of organic foulants from saline water prior to the membrane process. This research evaluates the performance of the ZnO-immobilized solar nanophotocatalytic process integrated with Fe 2+ /H 2 O 2 system for the removal of organics from reverse osmosis (RO) feed seawater. Machine-learning and response surface methodology (RSM) models were used for optimizing the performance of such a hybrid system in terms of five input factors: initial TOC (mg/L), pH, H 2 O 2 dosage (g/L), Fe 2+ dosage (mg/L) and solar irradiation time (minutes). Both machine-learning and RSM regression models were optimized using nondominated sorting genetic algorithm (NSGA-III) for estimating optimum organic degradation performance in terms of residual Fe 2+ , total organic carbon (TOC) removal and chemical oxygen demand (COD) removal. The response values obtained from the experimental run conducted at the optimum settings of ANN-NSGA-III was found to be TOC removal = 81.4%, COD removal = 77.4% and residual Fe 2+ = 1.95 mg/L. The pilot-scale solar nanophotocatalytic reactor optimized in the present research is worthy of being upscaled for wide application in desalination plants.

show abstract

TiO2/Al-PILC Catalysts Synthesized from a Non-Conventional Aluminum Source of Aluminum and Applied in the Photodegradation of Organic Compounds

Cardona,

Gil

2024

Top Catal

View full text Add to dashboard Cite

This study explores the transformative potential of Pillared InterLayered Clays (PILC) derived from non-conventional aluminum sources as catalytic supports in the synthesis of TiO2/catalysts for the efficient photodegradation of organic pollutants in water. Montmorillonite (Mt) and three alumina-pillared montmorillonite (PILC) synthesized using various aluminum sources, were impregnated with titanium to synthesize TiO2/catalysts. The successful synthesis of these materials was confirmed through several characterization techniques such as X-ray diffraction (XRD), N2 adsorption-desorption at -196 ºC, morphological analysis using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and Energy-Dispersive X-ray Spectrometry (EDX). The photolysis, adsorption, and catalytic behavior of the TiO2/catalysts were studied for the degradation of triclosan (TCS), 2,6-dichlorophenol (2,6-DCP), and bisphenol A (BPA). All synthesized catalysts surpassed the efficacy of commercial anatase, with TiO2/Al-PILC exhibiting superior performance in comparison to TiO2/Mt. Photodegradation was most effective under UV radiation, with TCS demonstrating the highest degradation (approximately 70%). Notably, Al-PILC samples, particularly those synthesized from saline slags, displayed enhanced properties. Among them, TiO2/Al-PILCAE exhibited the highest degradation rates under both UV and visible light, underlining the remarkable potential of saline slags as precursors for Al-PILC synthesis. This study provides valuable insights into the design and development of efficient catalysts for water treatment applications, paving the way for sustainable and effective solutions in the realm of environmental remediation.

show abstract

Nanophotocatalytic treatment of seawater using TiO2 immobilized and suspension system under solar irradiation

Cited by 8 publications

References 26 publications

Degradation of Tetracycline on SiO2-TiO2-C Aerogel Photocatalysts under Visible Light

Degradation of Tetracycline on SiO2-TiO2-C Aerogel Photocatalysts under Visible Light

Artificial intelligence‐based multiobjective optimization of reverse osmosis desalination pretreatment using a hybrid ZnO‐immobilized/photo‐Fenton process

TiO2/Al-PILC Catalysts Synthesized from a Non-Conventional Aluminum Source of Aluminum and Applied in the Photodegradation of Organic Compounds

Contact Info

Product

Resources

About