Bitter apple peel derived photoactive carbon dots for the sunlight induced photocatalytic degradation of crystal violet dye

Aggarwal, Ruchi; Saini, Deepika; Singh, Buta; Kaushik, Jaidev; Garg, Anjali; Sonkar, Sumit Kumar

doi:10.1016/j.solener.2020.01.010

Cited by 96 publications

(45 citation statements)

References 54 publications

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“…[38][39][40][41][42] CDs from green precursors have also been probed to detect dyes such as RhB, MB, MO, CR, CV, and many other azo dyes in aqueous solutions. [43][44][45][46][47] The objectives of the current review are compared with specific review articles reported on CDs derived from chemical and green precursors for photocatalytic dye degradation in Table 1.…”

Section: Rakhi Yadavmentioning

confidence: 99%

“…In the first case, bare CDs are achieved by any of the bottomup approaches, namely, hydrothermal, carbonization, microwave-assisted, ultrasonication, and pyrolysis. 45,58,59 Among these, hydrothermal methods are considered facile processes due to their soft chemical route resulting in a uniform particle size that serves as an excellent candidate for…”

Section: Synthesismentioning

confidence: 99%

“…180 To identify the active species responsible for potential photocatalytic degradation, a trapping experiment has been carried out, and several works have been reported. Aggarwal et al 45 performed a trapping experiment with scavengers such as Na 2 -EDTA, p-BZQ, and t-BA to trap holes, superoxide, and hydroxyl radicals, respectively. The photocatalytic activity rate decreases when electrons and holes are trapped by the Na 2 -EDTA complex, while the activity of other trapping agents is less distinct.…”

mentioning

confidence: 99%

“…Subsequently, the reactive oxygen species (ROS) reacts with the dye molecule and degrades into smaller fragments. 45 Anand and the group carried out similar work with CDs derived from the Bougainvillea plant with 0.5 to 5 mM of the same scavengers. 55 This exhibited a 55% reduction in photocatalytic activity at 0.5 mM of p-BZQ and a 25% reduction in photocatalytic activity efficiency at 0.5 mM of Na 2 -EDTA and t-BA because superoxide radicals influence the photodegradation activity strongly.…”

mentioning

confidence: 99%

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Review on green carbon dot-based materials for the photocatalytic degradation of dyes: fundamentals and future perspective

2021

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Section: Rakhi Yadavmentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Review on green carbon dot-based materials for the photocatalytic degradation of dyes: fundamentals and future perspective

2021

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“…Many organic materials have been used as precursor for synthesising C-dots, e.g., orange juice, bitter apple peel, banana peel and green tea leaf residue. [29][30][31][32] These precursor materials contain carbon atoms, which constitute the basic building blocks of C-dots. Furthermore, organic materials may also be organic wastes, e.g., chicken bones.…”

Section: Introductionmentioning

confidence: 99%

Chicken Bone Wastes as Precursor for C-dots in Olive Oil

Dwandaru¹,

Sari²

2020

JPS

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The objectives of this study were to synthesise and characterise carbon nanodots (C-dots) from chicken bone wastes in olive oil. The chicken bones were collected from the wastes of local chicken meat filleting shops, which were then cleaned, dried under the sun, heated in an oven at 250°C for 2 h, and ground into powder. One gram of the powder was dispersed into 10 ml of olive oil, which was then heated in a microwave for 5 min and filtered. For characterisation purposes, five drops of the solution were mixed with 8 ml of n-hexane. The carbonisation was indicated by the colour change of the solution after the microwave heating, i.e., from yellow (pure olive oil) to concentrated dark-brownish colour (C-dots solution). The characterisations were conducted using UV-Vis, photoluminescence (PL), Fourier-transform infrared (FTIR) and scanning electron microscope (SEM) to determine the optical properties of the C-dots, whereas the viscosity and the surface tension of pure olive oil and C-dots solution were also measured. The UV-Vis result showed two absorbance peaks of C-dots solution at 234 nm and 267 nm. The PL result showed green and red emissions at 499.57 nm and 673.52 nm, respectively. The FTIR result showed functional groups of C=C and C=O, which indicate the core and surface state of C-dots, respectively. The SEM result showed a surface morphology of C-dots aggregates in the structural form of homogeneous bulks. Finally, the C-dots solution had viscosity and surface tension, which were lower than those of pure olive oil so that the C-dots solution may be better absorbed by the body tissue for biomedical applications.

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Conversion of biomass to biochar using top‐lit updraft technology: a review

Adeniyi

Iwuozor

Muritala

et al. 2023

Biofuels Bioprod Bioref

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The demand for biochar has increased over time due to its wide range of applications in various industries. Biochar, which is the solid product of the thermochemical conversion of biomass, has been synthesized using different reactor‐based technologies. One such technology is top‐lit updraft (TLUD) technology. This study is a review of published literature that discusses trends in the utilization of the TLUD technology, focusing on biochar production. This study also evaluated the principles of TLUD technology. The properties and applications of TLUD‐based biochar were also discussed. In comparison with other technologies, TLUD technology is characterized by higher thermal efficiency, simplicity of starting the fuel, low smoke emission, and high biochar yield. It was observed that the use of TLUD technology resulted in the production of high‐quality biochar with a variety of characteristics, which has been utilized as an adsorbent for wastewater treatment, in the agricultural sector to increase soil nutrients, and as a solid fuel. The concept of semi‐batch‐fed TLUD technology was also introduced in this study to enhance the efficiency and output of the batch‐fed TLUD configuration that has been in use. Some knowledge gaps in the study could be addressed by future studies on the use of this technology.

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Bitter apple peel derived photoactive carbon dots for the sunlight induced photocatalytic degradation of crystal violet dye

Cited by 96 publications

References 54 publications

Review on green carbon dot-based materials for the photocatalytic degradation of dyes: fundamentals and future perspective

Review on green carbon dot-based materials for the photocatalytic degradation of dyes: fundamentals and future perspective

Chicken Bone Wastes as Precursor for C-dots in Olive Oil

Conversion of biomass to biochar using top‐lit updraft technology: a review

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