Preparation and modification methods of defective titanium dioxide-based nanoparticles for photocatalytic wastewater treatment—a comprehensive review

Haruna, Abdurrashid; Kait, Chong Fai; Ho, Yeek‐Chia; Merican, Zulkifli Merican Aljunid

doi:10.1007/s11356-022-22749-8

Cited by 21 publications

(5 citation statements)

References 354 publications

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“…Particle size and morphology significantly impact the efficacy of SnO materials in wastewater treatment. Smaller nanoparticles offer higher surface area and increased Tin Oxide Materials for Industrial Wastewater Treatment: Promising Adsorbents and Catalyst DOI: http://dx.doi.org/10.5772/intechopen.1004230 adsorption capacity [66]. As such, controlling particle size through synthesis parameters such as reaction temperature, precursor concentration, and surfactant use is crucial.…”

Section: Synthesis and Tailoring Of Tin Oxide Materialsmentioning

confidence: 99%

Tin Oxide Materials for Industrial Wastewater Treatment: Promising Adsorbents and Catalyst

M. Chauke,

C. Raphulu

2024

Wastewater Treatment - Past and Future Perspectives [Working Title]

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Tin oxide (SnO) materials have gained significant attention in recent years for their potential application in industrial wastewater treatment. This abstract provides an overview of the use of SnO materials in various treatment processes and their effectiveness in removing pollutants from wastewater. SnO materials exhibit excellent adsorption and catalytic properties, making them suitable for the removal of various contaminants, including heavy metals, organic compounds, and dyes. The unique surface chemistry and high surface area of SnO nanoparticles enable efficient adsorption and reaction with pollutants, leading to their successful removal from wastewater. Additionally, SnO-based photocatalysts have shown promising results in the degradation of organic pollutants under ultraviolet (UV) light irradiation. Moreover, SnO materials can be easily synthesized, and their surface properties can be tailored by controlling the synthesis parameters, such as particle size, morphology, and doping. However, challenges still exist in terms of cost-effectiveness, long-term stability, and large-scale implementation of SnO materials in wastewater treatment processes. Further research and development efforts are necessary to optimize the performance of SnO materials, enhance their stability, and address their limitations for practical application in industrial wastewater treatment systems. Overall, SnO materials hold great potential as effective adsorbents and catalysts for pollutant removal, contributing to the advancement of sustainable wastewater treatment technologies.

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Section: Synthesis and Tailoring Of Tin Oxide Materialsmentioning

confidence: 99%

Tin Oxide Materials for Industrial Wastewater Treatment: Promising Adsorbents and Catalyst

M. Chauke,

C. Raphulu

2024

Wastewater Treatment - Past and Future Perspectives [Working Title]

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“…The mild reaction environment and renewable resources are advantages of this catalytic process, which make it a potential candidate for addressing many of the challenges of green chemistry. − Semiconductor-based photocatalytic materials have emerged as efficient and cost-effective materials for photocatalytic reactions. In this context, TiO 2 and its composites receive wide attention compared to other metal oxides because of their low cost, good stability, nontoxicity, chemical stability, and longer lifetime. , TiO 2 photocatalytic technology can only effectively utilize less than 6% of the energy derived from the sunlight incident to the earth’s surface, which suggests its low potential for sustainable development in photocatalysis. − To address this problem, many modifications have been done on TiO 2 such as nonmetal and metal doping semiconductor compound modification and organic photosensitization. − Coupling of semiconductors or composites is an appropriate method to make photocatalysts effective in visible light for different applications. − In recent years, graphitic carbon nitride (g-C 3 N 4 ) has become a rising star in the photocatalytic field. It is a stable metal-free photocatalyst that respondss to visible light. − …”

Section: Introductionmentioning

confidence: 99%

“…In this context, TiO 2 and its composites receive wide attention compared to other metal oxides because of their low cost, good stability, nontoxicity, chemical stability, and longer lifetime. 9 , 10 TiO 2 photocatalytic technology can only effectively utilize less than 6% of the energy derived from the sunlight incident to the earth’s surface, which suggests its low potential for sustainable development in photocatalysis. 11 − 14 To address this problem, many modifications have been done on TiO 2 such as nonmetal and metal doping semiconductor compound modification and organic photosensitization.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Tandem Protocol for the Synthesis of Bis(indolyl)methanes using Cu-g-C₃N₄–Imine Decorated on TiO₂ Nanoparticles under Visible Light Irradiation

Ghanbari Kudeyani,

Jafarpour,

Pourmorteza

et al. 2024

ACS Omega

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In this article, the visible-light-assisted photocatalytic activity of TiO 2 nanoparticles functionalized with Cu(II) g−C 3 N 4 −imine was exploited for aerobic oxidation of alcohols to aldehydes followed by condensation with indoles in the presence of 2,2,6,6-tetramethylpiperidinyloxy to present a one-pot tandem strategy for the synthesis of bis(indolyl)methanes (BIMs) under solvent-free conditions. The synergistic effect between the components to improve the photocatalytic activity of the asprepared Cu-g-C 3 N 4 −imine/TiO 2 nanoparticles resulting from electron−hole separation was approved by PL spectroscopy. Moreover, action spectra showed a light-dependent photocatalysis with effective visible-light responsivity of the photocatalyst. The present method includes different aspects of green chemistry: onepot tandem synthesis of a variety of BIMs using alcohols that are less toxic, more available, more economical, and more stable than aldehydes; removing the byproducts resulting from overoxidation of alcohols and polymerization of aldehydes and indoles; the use of air as a safe oxidant; visible light as a safe energy source; and solvent-free conditions. A reusability test demonstrated that the catalyst retained its efficiency even after five runs.

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“…Titanium dioxide can be prepared using different methodologies. Those most reported in the literature include sol-gel, solvothermal/hydrothermal, sonochemical, and physical and chemical vapor depositions [ 5 ]. Particularly, the solvothermal technique, which involves the crystallization of TiO 2 from a non-aqueous solution of the metal precursor under controlled temperature and pressure, is very effective [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of the Precursor on the Physicochemical Properties and Photoactivity of TiO2 Nanoparticles Produced in Supercritical CO2

et al. 2023

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The synthesis of TiO2 nanoparticles (NPs) in supercritical media has been reported over the last two decades. However, very few studies have compared the physicochemical characteristics and photoactivity of the TiO2 powders produced from different precursors, and even fewer have investigated the effect of using different ratios of hydrolytic agent/precursor (HA/P) on the properties of the semiconductor. To bridge this knowledge gap, this research focuses on the synthesis and characterization of TiO2 NPs obtained in a supercritical CO2 medium from four different TiO2 precursors, namely diisopropoxytitanium bis (acetylacetonate) (TDB), titanium (IV) isopropoxide (TIP), titanium (IV) butoxide (TBO), and titanium (IV) 2-ethylhexyloxide (TEO). Further, the effect of various HA/P ratios (10, 20, 30, and 40 mol/mol) when using ethanol as a hydrolytic agent has also been analyzed. Results obtained have shown that the physicochemical properties of the catalysts are not significantly affected by these variables, although some differences do exist between the synthesized materials and their catalytic performances. Specifically, photocatalysts obtained from TIP and TEO at the higher HA/P ratios (HA/P = 30 and HA/P = 40) led to higher CO2 photoconversions (6.3–7 µmol·g−1·h−1, Apparent Quantum Efficiency < 0.1%), about three times higher than those attained with commercial TiO2 P-25. These results have been imputed to the fact that these catalysts exhibit appropriate values of crystal size, surface area, light absorption, and charge transfer properties.

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Preparation and modification methods of defective titanium dioxide-based nanoparticles for photocatalytic wastewater treatment—a comprehensive review

Cited by 21 publications

References 354 publications

Tin Oxide Materials for Industrial Wastewater Treatment: Promising Adsorbents and Catalyst

Tin Oxide Materials for Industrial Wastewater Treatment: Promising Adsorbents and Catalyst

Photocatalytic Tandem Protocol for the Synthesis of Bis(indolyl)methanes using Cu-g-C₃N₄–Imine Decorated on TiO₂ Nanoparticles under Visible Light Irradiation

Impact of the Precursor on the Physicochemical Properties and Photoactivity of TiO2 Nanoparticles Produced in Supercritical CO2

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Preparation and modification methods of defective titanium dioxide-based nanoparticles for photocatalytic wastewater treatment—a comprehensive review

Cited by 21 publications

References 354 publications

Tin Oxide Materials for Industrial Wastewater Treatment: Promising Adsorbents and Catalyst

Tin Oxide Materials for Industrial Wastewater Treatment: Promising Adsorbents and Catalyst

Photocatalytic Tandem Protocol for the Synthesis of Bis(indolyl)methanes using Cu-g-C3N4–Imine Decorated on TiO2 Nanoparticles under Visible Light Irradiation

Impact of the Precursor on the Physicochemical Properties and Photoactivity of TiO2 Nanoparticles Produced in Supercritical CO2

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Photocatalytic Tandem Protocol for the Synthesis of Bis(indolyl)methanes using Cu-g-C₃N₄–Imine Decorated on TiO₂ Nanoparticles under Visible Light Irradiation