Enhanced Ultraviolet-Visible Photocatalysis of RGO/Equaixial Geometry TiO2 Composites on Degradation of Organic Dyes in Water

Abstract The reduced graphene oxide dopped equaixial geometry TiO2 (rGO/egTiO2) composite as photocatalyst was synthesized hydrothermally with various mass ratios of tetrabutyl titanate. The photocatalyst is considered to be rGO/equaixial geometry TiO2 in terms of modifying the combined reduced graphene Oxide and TiO2. The rGO plays a vital role in rGO/egTiO2 composite as photocatalysts were analyzed in methylene blue (MB) and rhodamine B (RhB) photocatalytic degradation under UV and simulated solar light irradiation. This synthesized catalyst was characterized by various analytical techniques such as XPS, XRD, SEM, BET and TEM. The rGO/egTiO2 composite exhibits enhanced photo-catalytic performance with degradation rate of 97.5 and 97% on RhB and MB for 60 min under UV radiation respectively, while the degradation rate of 94 and 92 % was observed on the same dyes for 6 h under the simulated sunlight radiation. The enhanced photocatalytic performance of the rGO/egTiO2 composite under ultraviolet irradiation source was owing to a high separation efficiency of the photo-induced electron-hole pairs, while the photocatalytic performance under simulated sunlight radiation was due to the photosensitive and charge separator behavior of rGO. This offers us an excellent potential of significant photo catalytic activity for the removal of organic contaminants from wastewater.

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Synthesis of ZnS/CuS nanospheres loaded on reduced graphene oxide as high-performance photocatalysts under simulated sunlight irradiation

New Journal of Chemistry ◽

10.1039/c7nj00801e ◽

2017 ◽

Vol 41 (13) ◽

pp. 5732-5744 ◽

Cited By ~ 13

Author(s):

Liu Yang ◽

Xin Guan ◽

Guang-Sheng Wang ◽

Xiao-Hui Guan ◽

Bo Jia

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

High Performance ◽

Photocatalytic Performance ◽

Simulated Sunlight ◽

Sunlight Irradiation ◽

Reduced Graphene

Schematic descriptions for the formation of ZnS/CuS–rGO nanocomposites and their excellent photocatalytic performance.

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Anchoring superparamagnetic core–shells onto reduced graphene oxide: fabrication of Ni–carbon–rGO nanocomposite for effective adsorption and separation

RSC Advances ◽

10.1039/c4ra14651d ◽

2015 ◽

Vol 5 (13) ◽

pp. 10033-10039 ◽

Cited By ~ 10

Author(s):

Hang Du ◽

Zhen Wang ◽

Yinghao Chen ◽

Yanyan Liu ◽

Yushan Liu ◽

...

Keyword(s):

Waste Water ◽

Graphene Oxide ◽

Water Treatment ◽

Reduced Graphene Oxide ◽

Separation Efficiency ◽

Organic Dyes ◽

Waste Water Treatment ◽

Ni Nanoparticles ◽

Reduced Graphene

The magnetic Ni nanoparticles encapsulated in carbon shells were anchored on to reduced graphene oxide. The excellent removal ability of organic dyes and enhanced separation efficiency make NGC a useful candidate for waste water treatment.

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Construction and investigation on perovskite-type SrTiO3 @ reduced graphene oxide hybrid nanocomposite for enhanced photocatalytic performance

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2021.127523 ◽

2021 ◽

pp. 127523

Author(s):

G. Venkatesh ◽

S. Vignesh ◽

M. Srinivasan ◽

G. Palanisamy ◽

N. Elavarasan ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Photocatalytic Performance ◽

Hybrid Nanocomposite ◽

Reduced Graphene ◽

Perovskite Type

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Synthesis and photocatalytic performance of reduced graphene oxide–TiO2 nanocomposites for orange II degradation under UV light irradiation

Environmental Science and Pollution Research ◽

10.1007/s11356-017-8927-3 ◽

2017 ◽

Vol 24 (13) ◽

pp. 12416-12425 ◽

Cited By ~ 16

Author(s):

Tengfei Li ◽

Tiecheng Wang ◽

Guangzhou Qu ◽

Dongli Liang ◽

Shibin Hu

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Photocatalytic Performance ◽

Uv Light ◽

Light Irradiation ◽

Orange Ii ◽

Uv Light Irradiation ◽

Reduced Graphene

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Effects of Different TiO2 Particle Sizes on the Microstructure and Optical Limiting Properties of TiO2/Reduced Graphene Oxide Nanocomposites

Nanomaterials ◽

10.3390/nano9050730 ◽

2019 ◽

Vol 9 (5) ◽

pp. 730 ◽

Cited By ~ 4

Author(s):

Yuyu Ren ◽

Lili Zhao ◽

Yang Zou ◽

Lixin Song ◽

Ningning Dong ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Photoelectron Spectroscopy ◽

Optical Limiting ◽

Tio2 Particle ◽

Tetrabutyl Titanate ◽

Particle Sizes ◽

X Ray ◽

Reduced Graphene ◽

Source Materials

TiO2/reduced graphene oxide (rGO) nanocomposites with two different TiO2 particle sizes were synthesized by a facile hydrothermal method using two different source materials of Ti: tetrabutyl titanate (TBT) and commercial TiO2 powder (P25). For respective series with the same source materials, we investigated additions that optimized the nonlinear optical properties (NLO) and optical limiting (OL) performances, and we explored the relationships between structural diversity and performance. Several characterization techniques, including X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and diffuse reflectance ultraviolet-visible spectroscopy (UV-Vis) were conducted to confirm the microstructures and chemical states of as-prepared materials. This indicated the existence of the Ti–O–C bond between rGO sheets and TiO2 particles and the reduction from precursor graphene oxide (GO) to rGO. The results of UV-Vis spectra revealed that the TiO2/rGO nanocomposites showed smaller band gaps than bare TiO2. A nanosecond open-aperture Z-scan technique at 1064 nm was applied to investigate NLO and OL properties. TiO2/rGO nanocomposites exhibited enhanced NLO and OL performances, arising from synergistic effects, compared to individual components. The TBT series samples performed better than the P25 series, presumably relevant to dimensional effects.

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Bioinspired silver nanoparticles/reduced graphene oxide nanocomposites for catalytic reduction of 4-nitrophenol, organic dyes and act as energy storage electrode material

Composites Part B Engineering ◽

10.1016/j.compositesb.2019.106924 ◽

2019 ◽

Vol 173 ◽

pp. 106924 ◽

Cited By ~ 10

Author(s):

Haradhan Kolya ◽

Tapas Kuila ◽

Nam Hoon Kim ◽

Joong Hee Lee

Keyword(s):

Silver Nanoparticles ◽

Graphene Oxide ◽

Energy Storage ◽

Reduced Graphene Oxide ◽

Electrode Material ◽

Catalytic Reduction ◽

Organic Dyes ◽

Reduced Graphene

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Facile synthesis of magnetic Bi25FeO40/rGO catalyst with efficient photocatalytic performance for phenolic compounds under visible light

RSC Advances ◽

10.1039/c4ra11355a ◽

2015 ◽

Vol 5 (7) ◽

pp. 4905-4908 ◽

Cited By ~ 22

Author(s):

Yan Wu ◽

Hanjin Luo ◽

Xiaolu Jiang ◽

Hou Wang ◽

Junjie Geng

Keyword(s):

Graphene Oxide ◽

Phenolic Compounds ◽

Visible Light ◽

Hydrothermal Method ◽

Reduced Graphene Oxide ◽

Photocatalytic Performance ◽

Utilization Efficiency ◽

Facile Synthesis ◽

Facile Hydrothermal Method ◽

Reduced Graphene

To improve the utilization efficiency of the Bi25FeO40 catalyst, Bi25FeO40-reduced graphene oxide (rGO) composite photo-catalysts were prepared by a facile hydrothermal method.

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Alkyl Chain Grafted-Reduced Graphene Oxide Membrane for Effective Separation of Water/Alcohol Miscible Mixtures

Frontiers in Chemistry ◽

10.3389/fchem.2020.598562 ◽

2020 ◽

Vol 8 ◽

Author(s):

Hailong Zhang ◽

Jianbo Yang ◽

Ting Li ◽

Xingxiang Ji ◽

Zhen Xu ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Alkyl Chain ◽

Separation Efficiency ◽

Selective Absorption ◽

Direct Filtration ◽

Water Permeation ◽

Reduced Graphene ◽

Gravity Driven ◽

Water Alcohol

Separation of water/alcohol miscible mixtures via direct filtration only under gravity is a great challenge. Here, different alkyl chain grafted-reduced graphene oxide (alkyl-RGO) is synthesized and characterized. The hydrophobic alkyl chains can considerably modify the oil-wettability of the membranes and avoid water permeation. The alkyl-RGO membrane obtained by vacuum filtration can separate water/oil immiscible mixtures. Importantly, water/alcohol miscible mixtures could also be separated solely under gravity, where alcohols efficiently permeate the alkyl-RGO membrane while water is prevented through the membrane. The separation efficiency of C12H-RGO membrane reaches up to about 0.04 vol% of water content for the case of separating an n-propanol/water (90:10 v/v) mixture with high n-propanol permeability of approx. 685 mL m−2 h−1. Molecular simulations indicate that the selective absorption ability and diffusion rate also affect water/alcohol separation. The alkyl-RGO membranes via gravity driven filtration can extend the applications of separation of water/alcohol miscible mixtures.

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