Cobalt promoted TiO2/GO for the photocatalytic degradation of oxytetracycline and Congo Red

Jo, Wan-Kuen; Kumar, Santosh; Isaacs, Mark A.; Lee, Adam F.; Karthikeyan, S.

doi:10.1016/j.apcatb.2016.08.022

Cited by 326 publications

(96 citation statements)

References 61 publications

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“…Even low concentrations of such dyes pose serious risks to human and animal health, and their bio-or chemical degradation is challenging [216,217], hence the development advanced oxidation processes (AOPs) to treat contaminated drinking ground and surface waters, and wastewaters containing toxic or non-biodegradable compounds are sought [218,219]. Semiconductor photocatalysis offer an effective and economic approach to the treatment of recalcitrant organic compounds at low concentrations in wastewater [220][221][222][223]. Photoexcited holes are the key active species in such photocatalytic environmental remediation, being powerful oxidants in their own right, or reacting with water to produce hydroxyl radicals ( • OH) which are themselves powerful oxidants with an oxidation potential of 2.8 eV (NHE).…”

Section: Environmental Remediationmentioning

confidence: 99%

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

2018

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Graphitic carbon nitride (g-C 3 N 4 ) is a promising material for photocatalytic applications such as solar fuels production through CO 2 reduction and water splitting, and environmental remediation through the degradation of organic pollutants. This promise reflects the advantageous photophysical properties of g-C 3 N 4 nanostructures, notably high surface area, quantum efficiency, interfacial charge separation and transport, and ease of modification through either composite formation or the incorporation of desirable surface functionalities. Here, we review recent progress in the synthesis and photocatalytic applications of diverse g-C 3 N 4 nanostructured materials, and highlight the physical basis underpinning their performance for each application. Potential new architectures, such as hierarchical or composite g-C 3 N 4 nanostructures, that may offer further performance enhancements in solar energy harvesting and conversion are also outlined.

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Section: Environmental Remediationmentioning

confidence: 99%

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

2018

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“…However, few of them show practical application value, such that noble metals, high cost and scarcity limit their use in large scale applications for water purification. 21 Actually, in the developed heterogeneous Fenton catalyst, all the active components are not free metal ions but atoms connected to each other. Their outer sphere electrons are bounded by the other atoms besides themselves and no longer belong to the metal atom only.…”

Section: Introductionmentioning

confidence: 99%

Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl–SiO₂ nanospheres for enhancement of Fenton-catalytic efficiency

Lyu

Zhang

2016

Environ. Sci.: Nano

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An efficient Fenton-type nano-catalyst consisting of Cu, Ti and Al lattice-doped dandelion-like silica nanospheres (d-TiCuAl-SiO 2 Ns) was successfully prepared via a hydrothermal process for the first time. The lattice substitution of Cu, Ti and Al for Si initiated a higher and a lower electron density of the lattice O 2− around the lattice Cu and near the lattice Ti & Al, respectively, through the higher electronegativity of Cu on the basis of extended X-ray absorption fine structure, X-ray photoelectron spectroscopy, Fouriertransform infrared spectroscopy, cyclic voltammetry and electron paramagnetic resonance measurement.Thus, countless surface galvanic-like cells formed between the electron-rich Cu center (cathode) and the electron-deficient Ti and Al region (anode) on the nanospheres, enhancing the selective adsorption of H 2 O 2 on d-TiCuAl-SiO 2 Ns. This kind of surface structure facilitated the reduction of H 2 O 2 to˙OH at the cathode and induced the oxidation of organic radical intermediates (˙R) on the anode through the delivery of the electron of˙R to the cathode during the Fenton reaction, which resulted in almost all of the energy of H 2 O 2 being applied to the degradation of pollutants. Therefore, d-TiCuAl-SiO 2 Ns were highly effective and stable for persistent contaminant degradation at neutral pH values, which was ∼10 times higher than that of the conventional Fenton catalysts. Moreover, the utilization efficiency of H 2 O 2 has been maintained at a very high level throughout the Fenton reaction. Our findings indicated that the special surface design of nanoparticles could be applied toward the improvement of Fenton reaction efficiency and utilization of H 2 O 2 .

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“…5,9 In recent years, photocatalytic membrane reactors coupled with membrane separation and photocatalytic processes have been widely used in environmental management due to their good recyclability and self-cleaning antifouling properties. 17,18 Recently reported TiO 2 nanowires (NWs) exhibit better dispersibility, adsorption properties, and photocatalytic activity than TiO 2 nanoparticle (NP) due to their one-dimensional structure. [11][12][13][14] Some researchers have further discovered that TiO 2 can enhance its membrane flux and hydrophilicity.…”

Section: Introductionmentioning

confidence: 99%

High‐performance composite photocatalytic membrane based on titanium dioxide nanowire/graphene oxide for water treatment

Zeng

Xia

et al. 2019

J of Applied Polymer Sci

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In this study, a novel dopamine-modified TiO 2 nanowire (NW)-intercalated graphene-oxide-based photocatalytic (NWC) membrane was prepared by vacuum-assisted filtration using a commercial cellulose acetate membrane as a support layer. At the same time, compared with the synthesized reduced graphene-oxide/polydopamine/TiO 2 nanoparticle composite (NPC) membrane, it was found that the NWC membrane has high water flux (273 L m −2 h −1 ) and removal rate (above 98%) on the dye-oil emulsion. After 5 cycles of experiments, the NWC membrane maintained a relatively stable permeation flux and removal rate, which was significantly better than the NPC membrane. The results showed that the NWC membrane had a more uniform distribution of TiO 2 NW, and had better antifouling ability, recyclability, and photocatalytic performance than NPC membrane. In summary, the NWC photocatalytic membrane of this study shows excellent water purification potential and provides a new path for photocatalytic water treatment.

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Cobalt promoted TiO2/GO for the photocatalytic degradation of oxytetracycline and Congo Red

Cited by 326 publications

References 61 publications

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl–SiO₂ nanospheres for enhancement of Fenton-catalytic efficiency

High‐performance composite photocatalytic membrane based on titanium dioxide nanowire/graphene oxide for water treatment

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Cobalt promoted TiO2/GO for the photocatalytic degradation of oxytetracycline and Congo Red

Cited by 326 publications

References 61 publications

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl–SiO2 nanospheres for enhancement of Fenton-catalytic efficiency

High‐performance composite photocatalytic membrane based on titanium dioxide nanowire/graphene oxide for water treatment

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Product

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About

Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl–SiO₂ nanospheres for enhancement of Fenton-catalytic efficiency