Metal free, sunlight and white light based photocatalysis using carbon quantum dots from Citrus grandis: A green way to remove pollution

Ramar, Venkadeshkumar; Moothattu, Shaheer; Karthikeyan, B.

doi:10.1016/j.solener.2018.04.040

Cited by 108 publications

(43 citation statements)

References 44 publications

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“…For any potential nanomaterial, the constituents involved in the preparation play a vital role. NCDs have improved optical properties and compound idleness [ 26 ]. Similarly, utilization of plant extracts consisting of various bioactive molecules such as basic constituents (alkaloids), acidic components (tanins, flavonoids, ascorbic acid, tartaric acid, polyphenols, citric acid) and neutral ingredients (carbohydrates) built potent CDs because the synthetic kinetics depend upon these phytoconstituents.…”

Section: Source and Rationale Behind Ncdsmentioning

confidence: 99%

Natural carbon-based quantum dots and their applications in drug delivery: A review

Nair

Haponiuk

Thomas

et al. 2020

Biomedicine & Pharmacotherapy

161

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Graphical abstract Various NCDs with antimicrobial, anticancer and neurodegenerative drug delivery applications. a) Pleurotus species, b) Hylocereus undatus , c) Curcuma longa L., d) Manilkara zapota (L.) P. Royen , e) Banana leaf, f) Carica papaya , g) Ocimum Sanctum , h) Foeniculum vulgare Mill seeds, i) Azadirachta indica , j) Aloe vera (L.) Burm.f.

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Section: Source and Rationale Behind Ncdsmentioning

confidence: 99%

Natural carbon-based quantum dots and their applications in drug delivery: A review

Nair

Haponiuk

Thomas

et al. 2020

Biomedicine & Pharmacotherapy

161

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“…Catalytic degradation, in this work, was proposed to follow pseudo-first order kinetics according to the Langmuir-Hinshelwood model. 177 To summarize, efficient photocatalytic activities by Cdots are not only attributed to broad visible light absorption leading to photogenerated carriers but are also dependent on efficient electron transfer and charge separation ability and good electron accepting tendency from semiconductors and various surface functional groups. The reports, discussed above, are based on Cdots having short-range graphitic structures inside.…”

Section: Photocatalytic Applicationsmentioning

confidence: 99%

Recent advances in crystalline carbon dots for superior application potential

2020

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“…where C and C 0 represent the MB concentration at time t and the initial concentration of MB dye, respectively. The error analysis was calculated using the following standard deviation formula [74]:…”

Section: Photocatalytic Degradation Experimentsmentioning

confidence: 99%

“…The kinetics of degradation of MB were also investigated. The experimental data were fitted with the pseudo-first-order kinetic equation as expressed by Equation (18) [73,74]:…”

Section: Photocatalytic Degradation Experimentsmentioning

confidence: 99%

Hybridization of Nanodiamond and CuFe-LDH as Heterogeneous Photoactivator for Visible-Light Driven Photo-Fenton Reaction: Photocatalytic Activity and Mechanism

Liu

et al. 2019

Catalysts

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Establishing a heterojunction for two kinds of semiconductor catalysts is a promising way to enhance photocatalytic activity. In this study, nanodiamond (ND) and CuFe-layered double hydroxide (LDH) were hybridized by a simple coprecipitation method as a novel heterojunction to photoactivate H2O2. The ND/LDH possessed a hydrotalcite-like structure, large specific surface area (SBET = 99.16 m2/g), strong absorption of visible-light and low band gap (Eg = 0.94 eV). Under the conditions of ND/LDH dosage 0.0667 g/L, H2O2 concentration 19.6 mmol/L, and without initial pH adjustment, 93.5% of 10 mg/L methylene blue (MB) was degraded within 120 minutes, while only 78.3% of MB was degraded in the presence of LDH instead of ND/LDH. The ND/LDH exhibited excellent stability and maintained relatively high activity, sufficient to photoactivate H2O2 even after five recycles. The mechanism study revealed that in the heterojunction of ND/LDH, the photoelectrons transferred from the valence band of LDH (Cu/Fe 3d t2g) to the conduction band of LDH (Cu/Fe 3d eg) could spontaneously migrate onto the conduction band of ND, promoting the separation of photo-induced charges. Thus, the photoelectrons had sufficient time to accelerate the redox cycles of Cu3+/Cu2+ and Fe3+/Fe2+ to photoactivate H2O2 to produce hydroxyl radicals, resulting in excellent photo-Fenton efficiency on MB degradation.

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Metal free, sunlight and white light based photocatalysis using carbon quantum dots from Citrus grandis: A green way to remove pollution

Cited by 108 publications

References 44 publications

Natural carbon-based quantum dots and their applications in drug delivery: A review

Natural carbon-based quantum dots and their applications in drug delivery: A review

Recent advances in crystalline carbon dots for superior application potential

Hybridization of Nanodiamond and CuFe-LDH as Heterogeneous Photoactivator for Visible-Light Driven Photo-Fenton Reaction: Photocatalytic Activity and Mechanism

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