Photocatalytic Activity of Synthetic N‐doped TiO<sub>2</sub>/Reduced Graphene Oxide Crystalline Composites

Chen, Jianxin; Wang, Xinxin; Li, Yinhui; Zhang, Na; Su, Min; Han, Jian

doi:10.1002/ceat.201600671

Cited by 5 publications

(3 citation statements)

References 36 publications

(63 reference statements)

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“…Degradation is accomplished due to the presence of highly reactive OH, O 2 − , and O 3 , which are produced by imposing UV or sunlight onto the photocatalyst surface. The irradiated wavelength highly relies on the band gap energy of the employed photocatalyst . Conventional photocatalysts like TiO 2 and ZnO were used in many degradation processes, and scientists are trying to improve their efficiency.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile/α‐Fe₂O₃ Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

et al. 2020

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The potential of a novel a-Fe 2 O 3 /polyacrylonitrile (PAN) hybrid composite adsorbent to eliminate methylene blue (MB) from aqueous solution was evaluated. PAN was selected as the base composite. The presence of a-Fe 2 O 3 as nanophotocatalyst on the surface of PAN introduced an efficient photocatalytic hybrid composite adsorbent for degrading MB. Effects of a-Fe 2 O 3 nanopowder loading, pH, temperature, MB initial concentration, solar light, and contact time were investigated. Langmuir, Freundlich, and Temkin isotherms were applied to analyze the adsorption behavior. The Freundlich equation provided the best correlation with experimental data. Pseudo-first-order, pseudo-second-order, and intraparticle models were employed. Thermodynamic studies indicated an endotherm and spontaneous adsorption process in a defined temperature range.

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Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile/α‐Fe₂O₃ Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

et al. 2020

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“…Composite materials consisting of two or more materials are widely used in many industrial fields . Selecting desirable combinations of materials can produce various properties.…”

Section: Introductionmentioning

confidence: 99%

Crystallization Behavior of Glycine Molecules with Electrolytic Dissociation on Charged Silica Gel Particles

et al. 2018

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The surface charge of metal oxides in the solution phase may be a driving force for crystallization. Composite particles were prepared using the principle of heterogeneous nucleation on a metal surface with varying charge density. The electrical properties of the silica gel particles in an electrolyte solution were controlled by the pH, and the zero charge point and charge density of the silica gel particles were determined by titration. The morphology of the glycine particles on the silica gel surface depended on the electrical properties of the silica gel particle, resulting in alteration of the glycine polymorph. Powder X‐ray diffraction showed that γ‐glycine was present at low pH, and α‐glycine, at high pH. The polymorphism arose from the abundance ratio of the solute ions and the solution structure.

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“…36 It was confirmed that the RGO-TiO 2 nanocomposites exhibited an agglomerated morphology and less synergy effect between RGO and TiO 2 due to the severe aggregation of GO layers. 37 In addition, the spherical TiO 2 nanoparticles were liable to agglomerate. Thus, poor interfacial contact between RGO and TiO 2 lead to the low photocatalytic activity of RGO-TiO 2 composites.…”

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confidence: 99%

Robust self-cleaning effects of cotton fabrics coated with reduced graphene oxide (RGO)-titanium dioxide (TiO₂) nanocomposites

Zhang

Chen

et al. 2021

Textile Research Journal

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The self-cleaning textiles coated with reduced graphene oxide-titanium dioxide (TiO2) nanocomposites have enhanced photocatalytic activities and could have great potential in practical applications. However, it is still problematic regarding how to avoid aggregation of reduced graphene oxide nanosheets in producing reduced graphene oxide-TiO2 nanocomposites. In this research article, we propose a new method to reduce the aggregation of reduced graphene oxide nanosheets in producing cotton fabrics coated with reduced graphene oxide-TiO2 nanocomposites by combining vibration-assisted ball milling and hydrothermal synthesis process. The microstructure and photocatalytic-related properties of the resultant reduced graphene oxide-TiO2 nanocomposites and their coating cotton fabrics were characterized by using a series of techniques including field emission scanning electron microscope (FESEM), atomic force microscope (AFM), X-ray diffraction spectroscopy (XRD), Raman, particle size distribution, Brunauer-Emmett-Teller,(BET), transmission electron microscope (TEM), X-ray photoelectron spectrometer (XPS), diffuse reflectance spectra (DRS), ultraviolet photoelectron spectroscope (UPS), and photoluminescence (PL). It was indicated that the aggregation of reduced graphene oxide nanosheets in reduced graphene oxide-TiO2 nanocomposites was successfully avoided via ball milling in the presence of tetrabutyl titanate. After hydrothermal treatment, the resulting reduced graphene oxide-TiO2 nanocomposites were firmly immobilized on cotton fabric. It was demonstrated in the self-cleaning experiments that the resultant self-cleaning cotton fabrics are hydrophilic and could directly decompose color contaminants such as methylene blue, Congo red, and coffee stains under simulated sunlight irradiation due to the photo-degradation reactions of the reduced graphene oxide-TiO2 nanocomposite coating. The reduced graphene oxide-TiO2 nanocomposite-modified cotton fabric also exhibited excellent performance in both robust abrasion resistance and soap-washing resistance. The fabric photocatalytic self-cleaning capability was not found to decrease significantly after being repeatedly used for five times.

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Photocatalytic Activity of Synthetic N‐doped TiO₂/Reduced Graphene Oxide Crystalline Composites

Cited by 5 publications

References 36 publications

Polyacrylonitrile/α‐Fe₂O₃ Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

Polyacrylonitrile/α‐Fe₂O₃ Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

Crystallization Behavior of Glycine Molecules with Electrolytic Dissociation on Charged Silica Gel Particles

Robust self-cleaning effects of cotton fabrics coated with reduced graphene oxide (RGO)-titanium dioxide (TiO₂) nanocomposites

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Photocatalytic Activity of Synthetic N‐doped TiO2/Reduced Graphene Oxide Crystalline Composites

Cited by 5 publications

References 36 publications

Polyacrylonitrile/α‐Fe2O3 Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

Polyacrylonitrile/α‐Fe2O3 Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

Crystallization Behavior of Glycine Molecules with Electrolytic Dissociation on Charged Silica Gel Particles

Robust self-cleaning effects of cotton fabrics coated with reduced graphene oxide (RGO)-titanium dioxide (TiO2) nanocomposites

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Product

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Photocatalytic Activity of Synthetic N‐doped TiO₂/Reduced Graphene Oxide Crystalline Composites

Polyacrylonitrile/α‐Fe₂O₃ Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

Polyacrylonitrile/α‐Fe₂O₃ Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

Robust self-cleaning effects of cotton fabrics coated with reduced graphene oxide (RGO)-titanium dioxide (TiO₂) nanocomposites