TiO2-GO nanocomposite for photocatalysis and environmental applications: A green synthesis approach

Sharma, Mahima; Behl, Kannikka; Nigam, Subhasha; Joshi, Monika

doi:10.1016/j.vacuum.2018.08.009

Cited by 166 publications

(64 citation statements)

References 31 publications

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“…Rapid growth of the world's population and industrialization has led to increasing environmental pollution, such that around 750 million people face lack of access to clean water [2,3]. Water reservoirs are recurrently contaminated by various hazardous pollutants containing heavy metal ions, dyes, oil, and other chemicals that are released from different leather tanneries and industries related to textile, rubber, paper, cosmetics, dyeing, plastic, and food [4]. According to the World Bank report, 17-20% of water pollution is instigated by textile industry.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with Effective Photocatalytic Activity for Wastewater Treatment

et al. 2020

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Graphene oxide (GO) was obtained through modified hummers method, and reduced graphene oxide (rGO) was acquired by employing heat treatment. Various concentrations (2.5, 5, 7.5, and 10 wt. %) of silver (Ag) were incorporated in GO nanosheets by adopting hydrothermal approach. Synthesized Ag decorated rGO photocatalyst Ag/rGO was characterized using X-ray diffraction (XRD) to determine phase purity and crystal structure. XRD patterns showed the formation of GO to Ag/rGO. Molecular vibration and functional groups were determined through Fourier Transform Infrared spectroscopy (FTIR). Optical properties and a decrease in bandgap with insertion of Ag were confirmed with UV-Visible (Uv-Vis) spectrophotometer and photoluminescence (PL). Electronic properties and disorders in carbon structures were investigated through Raman spectroscopy that revealed the existence of characteristic bands (D and G). Surface morphology of prepared samples was examined with field emission scanning electron microscope (FESEM). Homogeneous distribution, size, and spherical shape of Ag NPs over rGO sheets were further confirmed with the help of high-resolution transmission electron microscope (HR-TEM). Dye degradation of doped and undoped samples was examined through Uv-Vis spectra. Experimental results indicated that photocatalytic activity of Ag@rGO enhanced with increased doping ratio owing to diminished electron-hole pair recombination. Therefore, it is suggested that Ag@rGO can be used as a beneficial and superior photocatalyst to clean environment and wastewater.

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Section: Introductionmentioning

confidence: 99%

“…Annually~1/10th million types of dyes are produced in numerous textile processes, among these dyes methylene blue (MB) 10-15% is directly released in the effluent. These pollutants create serious health issues such as cancer, skin irascibilities, allergy, and liver malfunctioning and are also harmful to aquatic life [4,5].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with Effective Photocatalytic Activity for Wastewater Treatment

et al. 2020

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“…Several techniques such as adsorption [8], sonolysis [9], oxidation [10], (photo)-Fenton process [11], photocatalytic degradation [12,13] and ozonation [14] have been adapted for the eradication of organic effluents from waste-water. Among them, the semiconductor-based photocatalysis technique has received considerable attention owing to its low-cost, high photostability and eco-friendly nature towards the photocatalytic degradation of organic pollutants via freely available solar energy [15][16][17]. In addition, it can degrade the hazardous organic pollutants into nontoxic molecules such as CO 2 , H 2 O and mineral acids without creating secondary pollution and hence, the photocatalysis has been called green technology in recent times [18].…”

Section: Introductionmentioning

confidence: 99%

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

et al. 2018

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In this work, we have synthesized the rod-on-rod–like α-FeOOH/α-AgVO3 nanocomposite photocatalysts with the different amounts of solvothermally synthesized α-FeOOH nanorods via a simple co-precipitation method. The as-synthesized photocatalysts were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, UV−Visible diffuse reflectance spectroscopy, scanning electron microscopy (SEM), element mapping, high-resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS) analysis. The observed SEM images show that both α-AgVO3 and α-FeOOH exhibits the rod-shaped morphology with nano size. Furthermore, the photocatalytic activities of the obtained photocatalysts were evaluated towards the degradation of Rhodamine B (RhB) under visible-light irradiation. It is demonstrated that the 3 mg α-FeOOH added to the α-FeOOH/α-AgVO3 nanocomposite exhibited an enhanced photocatalytic performance as compared with the pure α-AgVO3 and α-FeOOH. This significant improvement can be attributed to the increased photo-excited electron-hole pair separation efficiency, large portion of visible-light absorption ability and the reduced recombination of the electron-hole pair. The recycling test revealed that the optimized nanocomposite exhibited good photostability and reusability properties. In addition, the believable photodegradation mechanism of RhB using α-FeOOH/α-AgVO3 nanocomposite is proposed. Hence, the developed α-FeOOH/α-AgVO3 nanocomposite is a promising material for the degradation of organic pollutants in an aqueous environment.

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“…Rapid growth of world's population and industrialization has led to increasing environmental pollution, such that around 750 million people face lack of access to clean water [2,3]. Water reservoirs are recurrently contaminated by various hazardous pollutants containing heavy metal ions, dyes, oil and other chemicals that are released 3 from different leather tanneries and industries related to textile, rubber, paper, cosmetics, dyeing, plastic and food [4]. According to the World Bank report, 17-20% of water pollution is instigated by textile industry.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with effective Photocatalytic Activity for Wastewater Treatment

Ikram

Raza

Imran

et al. 2020

Preprint

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Graphene oxide (GO) was obtained through modified hummers method and reduced graphene oxide (rGO) was acquired by employing heat treatment. Various concentrations (2.5, 5, 7.5 and 10 wt.%) of silver (Ag) were incorporated in GO nanosheets by adopting hydrothermal approach. Synthesized Ag decorated rGO photocatalyst Ag/rGO was characterized using X-ray diffraction (XRD) to determine phase purity and crystal structure. XRD patterns showed the formation of GO to Ag/rGO. Molecular vibration and functional groups were determined through Fourier Transform Infrared spectroscopy (FTIR). Optical properties and a decrease in bandgap with insertion of Ag were confirmed with UV-visible (Uv-vis.) spectrophotometer and Photoluminescence (PL). Electronic properties and disorders in carbon structures were investigated through Raman spectroscopy that revealed the existence of characteristic bands (D and G). Surface morphology of prepared samples was examined with Field Emission Scanning Electron Microscope (FESEM). Homogeneous distribution, size and spherical shape of Ag NPs over rGO sheets were further confirmed with the help of High-Resolution Transmission Electron Microscope (HR-TEM). Dye degradation of doped and undoped samples was examined through Uv-vis. spectra. Experimental results indicated that photocatalytic activity of Ag@rGO enhanced with increased doping ratio owing to diminished electron-hole pair recombination. Therefore, it is suggested that Ag@rGO can be used as a beneficial and superior photocatalyst to clean environment and wastewater.

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TiO2-GO nanocomposite for photocatalysis and environmental applications: A green synthesis approach

Cited by 166 publications

References 31 publications

Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with Effective Photocatalytic Activity for Wastewater Treatment

Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with Effective Photocatalytic Activity for Wastewater Treatment

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with effective Photocatalytic Activity for Wastewater Treatment

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