Multifunctional transition metal doped titanium dioxide reduced graphene oxide composites as highly efficient adsorbents and photocatalysts

Thalgaspitiya, Wimalika R.K.; Kapuge, Tharindu Kankanam; He, Jian; Deljoo, Bahareh; Meguerdichian, Andrew G.; Aindow, Mark; Suib, Steven L.

doi:10.1016/j.micromeso.2020.110521

Cited by 17 publications

(6 citation statements)

References 46 publications

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“…As shown in Figure 1(b), (c), and (d) the band gaps of the synthesised nanocomposite rGO/TiO 2 /P(ANI-co-IN) shifted to lower values when compared to TiO 2 /P(ANI-co-IN) and rGO/ TiO 2 /P(ANI-co-IN), which may account for the improved photocatalytic activity under visible light. [9,29]…”

Section: Uv-vis Diffuse Reflectance Spectramentioning

confidence: 99%

“…The advantages of adsorption technologies include being affordable, straightforward, effective at totally removing hazardous substances from effluent, reusable, and adaptable to a wide range of applications. [9] In which the possibility of using advanced oxidation processes (AOPs) to remove organic waste from water and waste water has garnered interest recently. [10] AOPs are a group of chemical treatment techniques that, in general, aim to remove organic and/or inorganic contaminants from water and waste water by using semiconductor materials in oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of the methods above entail costly, time‐consuming procedures, cannot be used in all waste water systems, only function with a small variety of colours, and produce harmful by‐products. The advantages of adsorption technologies include being affordable, straightforward, effective at totally removing hazardous substances from effluent, reusable, and adaptable to a wide range of applications [9] . In which the possibility of using advanced oxidation processes (AOPs) to remove organic waste from water and waste water has garnered interest recently [10] .…”

Section: Introductionmentioning

confidence: 99%

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Reduced Graphene Oxide Supported TiO₂ and P(ANI‐co‐IN) Nanocomposite for Environmental Remediation: Degradation of Dye Pollutants from Toxic Rhodamine B

Minisha

Rajakani²

2023

ChemistrySelect

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Environmental remediation projects are becoming increasingly interested in polymers, transition-metal oxides and graphene based nanocomposites as photocatalysts. To increase their effectiveness, they could be adjusted in conjunction with one another. A hierarchically organised nanocomposite of reduced graphene oxide based TiO 2 and copolymer (Aniline and Indole) (rGO/ TiO 2 /P(ANI-co-IN)) , TiO 2 /P(ANI-co-IN) and P(ANI-co-IN) has been synthesized by heterogeneous emulsion polymerization and is used as a catalyst for the degradation of the cationic Rhodamine (RhB) dye. Different analyses were used to characterize the resulting nanocomposites i. e. UV-Vis diffuse reflectance spectra (DRS), Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), Energy Dispersive X-Ray Spectroscopy (EDX), High Resolution Transmission electron microscopy (HR-TEM), Selected area (electron) diffraction (SAED) and thermogravimetric analysis (TGA). DRS results revealed that the rGO/ TiO 2 / P(ANI-co-IN) nanocomposites band gap decreased when compared to TiO 2 /P(ANI-co-IN) and P(ANI-co-IN). Here, rGO/ TiO 2 /P(ANI-co-IN) has outperformed every previous study on polymer/metal oxide/graphene-based ternary nanocomposites, achieving 92 % RhB degradation within 80 min with a degradation rate constant of 0.032 min À 1 . The reusability of rGO/ TiO 2 /P(ANI-co-IN) was run over five cycles which bought in only a small change which could be negligible. Overall, this research may make it easier to synthesise hierarchically organised ternary nanocomposites in the future, which might be used to improve photocatalysis and address environmental protection challenges.

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Section: Uv-vis Diffuse Reflectance Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reduced Graphene Oxide Supported TiO₂ and P(ANI‐co‐IN) Nanocomposite for Environmental Remediation: Degradation of Dye Pollutants from Toxic Rhodamine B

Minisha

Rajakani²

2023

ChemistrySelect

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“…Their theoretically calculated results through density functional theory revealed that the impurity states of 4d electrons would form new degenerate energy levels, thus narrowing the band gap of TiO 2 . Thalgaspitiya et al [126] synthesized mesoporous composites of M-doped titanium dioxide (M = Mn, Co, Ni, Mo, and W) with reduced graphene oxide (rGO), indicating that the indirect band gap of the composites could be adjusted into the range of 2.20-2.48 eV.…”

Section: Metal Ion Dopingmentioning

confidence: 99%

A Review on Oxygen-deficient Titanium Oxide for Photocatalytic Hydrogen Production

Chen¹,

Fu²,

Peng³

2023

Preprint

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Photocatalytic technology based on specific band structure of semiconductors offers a promising way to solve the urgent energy and environmental issues in modern society. In particular, hydrogen production from water splitting over semiconductor photocatalysts attracts great attention owing to the clean source and application of energy, which highly depends on the performance of photocatalysts. Among the various photocatalysts, TiO2 has been intensively investigated and used extensively due to its outstanding photocatalytic activity, high chemical stability, non-toxicity and low cost. However, pure TiO2 has a wide band gap of approximately 3.2 eV, which limits its photocatalytic activity for water splitting to generate hydrogen only under ultraviolet light, excluding most of the inexhaustible sunlight for human beings. Fortunately, the band gap of semiconductors can be manipulated, in which introducing oxygen defects is one of the most effective measures to narrow the band gap of titanium oxides. This review starts out by the fundamentals of photocatalytic water splitting for hydrogen production over TiO2, discusses the latest progress in this field, and summarizes the various methods and strategies to induce oxygen defects in TiO2 crystals. Then, the next section outlines the modification approaches of oxygen-deficient titanium oxide (TiO2-δ) to further improve its photocatalytic performance. Finally, a brief summary and outlook of the researches on TiO2-δ photocatalysts for water splitting to produce hydrogen were presented.

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“…Transition metal ion doping is a convenient and effective technology for modifying the surface of TiO 2 [16,17]. This process involves overlapping the ns 2 or empty d orbital of the metal ion with the 2p orbital of oxygen in TiO 2 , resulting in the creation of a new energy band within the wide bandgap of the semiconductor.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Gaseous Benzene Using Cu/Fe-Doped TiO2 Nanocatalysts under Visible Light

Tian,

Zhang,

Tian

et al. 2023

Molecules

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Visible-light-enhanced TiO2 nanocatalysts doped with Cu and Fe were synthesized using the sol–gel method to investigate their performance in degrading gaseous benzene. The structure and morphology of mono- and co-doped TiO2 (i.e., Cu/Fe-TiO2, Cu-Fe-TiO2) were characterized using SEM, EDS, XRD, BET, Raman, UV-vis-DRS, and XPS techniques. The results indicated that the presence of Cu/Fe mono- and co-doped TiO2 leads to the formation of an anatase phase similar to pure TiO2. Furthermore, the introduction of Cu/Fe enhanced the presence of lattice defects and increased the specific surface area of TiO2. This enhancement can be attributed to the increase in oxygen vacancies, especially in the case of Cu-Fe-TiO2. Additionally, Cu-Fe-TiO2 showed a higher concentration of surface-bound hydroxyl groups/chemically adsorbed oxygen and a narrower bandgap than pure TiO2. Consequently, Cu-Fe-TiO2 exhibited the highest photocatalytic performance of 658.33 μgC6H6/(g·h), achieving a benzene degradation rate of 88.87%, surpassing that of pure TiO2 (5.09%), Cu-TiO2 (66.92%), and Fe-TiO2 (59.99%). Reusability tests demonstrated that Cu-Fe-TiO2 maintained a high benzene degradation efficiency of 71.4%, even after five experimental cycles, highlighting its exceptional stability and reusability. In summary, the addition of Cu/Fe to TiO2 enhances its ability to degrade gaseous benzene by prolonging the catalyst’s lifespan and expanding its photoresponse range to include visible light.

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Multifunctional transition metal doped titanium dioxide reduced graphene oxide composites as highly efficient adsorbents and photocatalysts

Cited by 17 publications

References 46 publications

Reduced Graphene Oxide Supported TiO₂ and P(ANI‐co‐IN) Nanocomposite for Environmental Remediation: Degradation of Dye Pollutants from Toxic Rhodamine B

Reduced Graphene Oxide Supported TiO₂ and P(ANI‐co‐IN) Nanocomposite for Environmental Remediation: Degradation of Dye Pollutants from Toxic Rhodamine B

A Review on Oxygen-deficient Titanium Oxide for Photocatalytic Hydrogen Production

Photocatalytic Degradation of Gaseous Benzene Using Cu/Fe-Doped TiO2 Nanocatalysts under Visible Light

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Multifunctional transition metal doped titanium dioxide reduced graphene oxide composites as highly efficient adsorbents and photocatalysts

Cited by 17 publications

References 46 publications

Reduced Graphene Oxide Supported TiO2 and P(ANI‐co‐IN) Nanocomposite for Environmental Remediation: Degradation of Dye Pollutants from Toxic Rhodamine B

Reduced Graphene Oxide Supported TiO2 and P(ANI‐co‐IN) Nanocomposite for Environmental Remediation: Degradation of Dye Pollutants from Toxic Rhodamine B

A Review on Oxygen-deficient Titanium Oxide for Photocatalytic Hydrogen Production

Photocatalytic Degradation of Gaseous Benzene Using Cu/Fe-Doped TiO2 Nanocatalysts under Visible Light

Contact Info

Product

Resources

About

Reduced Graphene Oxide Supported TiO₂ and P(ANI‐co‐IN) Nanocomposite for Environmental Remediation: Degradation of Dye Pollutants from Toxic Rhodamine B

Reduced Graphene Oxide Supported TiO₂ and P(ANI‐co‐IN) Nanocomposite for Environmental Remediation: Degradation of Dye Pollutants from Toxic Rhodamine B