Upcycling process of transforming waste coffee into spherical graphene by flash pyrolysis for sustainable supercapacitor manufacturing with virgin graphene electrodes and its comparative life cycle assessment

Dericiler, Kuray; Koçanalı, Atakan; Buldu-Akturk, Merve; Erdem, Emre; Okan, Burcu Saner

doi:10.1007/s13399-022-02447-8

Cited by 10 publications

(15 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The O1s spectra as in Figure 2(c) could be deconvoluted into two peaks at 533 eV corresponding to MnÀ OÀ Mn [27] and 530.39 eV characteristic of carbon single bonded to oxygen (CÀ O) [28] of rGO. Figure 2(d) depicts the deconvoluted C1s spectra which shows a strong peak for CÀ C in sp 2 hybridization at 284.46 eV and a weak peak at 285.18 eV for CÀ C in sp 3 hybridization state [29]. This correlates well with the Raman results where the sp 2 hybridization state was found to be predominant based on the I d /I g ratio further validating the thermal reduction of GO to form rGO.…”

Section: Characterizationsupporting

confidence: 79%

Design and Development of a Non‐Enzymatic Electrochemical Biosensor for the Detection of Glutathione

et al. 2022

View full text Add to dashboard Cite

Glutathione (GSH-reduced form) is a tripeptide that plays a vital role as an antioxidant to remove xenobiotics in the human body and changes in GSH levels are a marker for the progression of various diseases. In this context, a highly sensitive non-enzymatic electrochemical biosensor for the detection of GSH has been developed using reduced graphene oxide Manganese oxide (rGMnO) nanocomposite as the nano-interface. Initially, graphene oxide was synthesized by Hummer's method and then thermally reduced in the presence of MnO 2 in a blast furnace to obtain rGMnO nanocompo-site. The nanocomposite was characterized to validate its structure and morphological properties via Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman, and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry and amperometry studies showed that upon the addition of GSH, the Pt/rGMnO modified working electrode exhibited a linear response in the range of 1-100 μM at an input voltage of À 0.62 V. The developed sensor was found to have a sensitivity of 0.3256 μA μM À 1 and LOD of 970 nM with a recovery of 92-104 % in real blood serum samples.

show abstract

Section: Characterizationsupporting

confidence: 79%

Design and Development of a Non‐Enzymatic Electrochemical Biosensor for the Detection of Glutathione

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Graphene structure is directly affected by the production type, applied temperature level, and the utilized carbon source. 37,40,41 Therefore, it is crucial to examine the produced upcycled graphene/talc hybrid additive characteristics by leading spectroscopic analysis, one of which is Raman spectroscopy. Comparison Raman spectra of micron talc, upcycled graphene/Fe-micron talc hybrid additives from hybrid-CC and hybrid-FP are shown in Figure 2a.…”

Section: Characterizationmentioning

confidence: 99%

“…43 The ratio of the intensities of D and G peaks (I D /I G ) informs about the structural disorders as if the ratio increases, sp 2 bonds are broken and more sp 3 bonds are generated causing irregularity in the graphene structure. 44 According to the I D /I G ratio of hybrid-CC and hybrid-FP in Figure 2a, the FP resulted in turbostratic graphene structure 37 with fewer irregularities compared with the CC since the I D /I G ratio of the hybrid-FP (0.94) was lower than that of hybrid-CC (1.38). On the other hand, the number of graphene layers could be estimated by the I G /I 2D ratios.…”

Section: Characterizationmentioning

confidence: 99%

Selective thermal recycling for graphene growth on natural substrates: A comparative study on life cycle assessment, energy consumption, and mechanical performance in recompounding

Baskan‐Bayrak,

Kocanali,

Saner Okan

2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Manufacturing of carbon‐based materials from waste thermoplastics is a keystone to reduce adverse environmental impacts. There are numerous attempts for sustainable graphene manufacturing from various waste sources by thermal treatment but there is no clear distinction on the effective conversion process by addressing reliable CO2 footprints. This study provides a comprehensive benchmarking study on the conversion of waste polypropylene plastics coming from yogurt containers into graphene on the substrate of talc by applying two upcycling techniques of catalytic carbonization (CC) and flash pyrolysis (FP) by comparing energy and speed of the processes and a dimensional stability and physical characteristics of the produced graphene substances by adopting a comparative life cycle assessment. FP led to the sphericalization of graphenes due to fast dehydration, cross‐linking, and carbonization of aromatic structures. On the other hand, gradual heating in CC caused the formation of tubular‐like graphene structures. In addition, FP became advantageous by resulting in 52% of CO2 emission compared with CC process. On the other hand, graphenes separated from talcs exhibited a remarkable 70% reduction in global warming potential compared with conventional graphene production from graphite. In order to complete the value chain and circularity, the mechanical performance of two different hybrid additives produced by selective thermal recycling in recompounding with copolymer polypropylene was examined, and additives from CC enhanced the flexural and tensile properties two times better than the one from FP. With this study, it becomes possible to compare analysis of graphene growth on natural substrates by exploring life cycle assessment, energy consumption, and mechanical performance with selective thermal recycling and recompounding.

show abstract

“…At present, people are optimistic about supercapacitors and expect that they can provide services for more aspects of human life in the future. [37][38][39] A supercapacitor is mainly composed of several parts including a current collector, electrode, electrolyte and diaphragm, where the diaphragm plays a role in separating the two electrodes, preventing a short circuit between the electrodes, and allowing ions to pass through. [40][41][42][43] Electrolytes are homogeneous mixtures of acids, alkaline or salts with specific solvents and can be mainly classified as liquid electrolytes and solid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Progress of layered double hydroxide-based materials for supercapacitors

Ren

Sridhar³

et al. 2023

Mater. Chem. Front.

View full text Add to dashboard Cite

show abstract

Upcycling process of transforming waste coffee into spherical graphene by flash pyrolysis for sustainable supercapacitor manufacturing with virgin graphene electrodes and its comparative life cycle assessment

Cited by 10 publications

References 58 publications

Design and Development of a Non‐Enzymatic Electrochemical Biosensor for the Detection of Glutathione

Design and Development of a Non‐Enzymatic Electrochemical Biosensor for the Detection of Glutathione

Selective thermal recycling for graphene growth on natural substrates: A comparative study on life cycle assessment, energy consumption, and mechanical performance in recompounding

Progress of layered double hydroxide-based materials for supercapacitors

Contact Info

Product

Resources

About