Orange peels-derived hydrochar for chemical sensing applications

Espro, Claudia; Satira, Antonella; Mauriello, Francesco; Anajafi, Zakie; Moulaee, Kaveh; Iannazzo, Daniela; Neri, G.

doi:10.1016/j.snb.2021.130016

Cited by 30 publications

(22 citation statements)

References 64 publications

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“…The carbonaceous residue obtained by the HTC of the citrus processing waste is rich in oxygenated functional groups, making it a promising material in a wide range of applications, including pollutants adsorption [14], soil amendment [15], as fuel in energy applications [11] and as a low-cost material for capacitor and sensing applications, as recently reported by some of the authors [16][17][18][19].…”

Section: Introductionmentioning

confidence: 88%

Hydrothermal Carbonization as Sustainable Process for the Complete Upgrading of Orange Peel Waste into Value-Added Chemicals and Bio-Carbon Materials

et al. 2021

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In this study, a simple and green protocol to obtain hydrochar and high-added value products, mainly 5-hydroxymethylfurfural (5-HMF), furfural (FU), levulinic acid (LA) and alkyl levulinates, by using the hydrothermal carbonization (HTC) of orange peel waste (OPW) is presented. Process variables, such as reaction temperature (180–300 °C), reaction time (60–300 min), biomass:water ratio and initial pH were investigated in order to find the optimum conditions that maximize both the yields of solid hydrochar and 5-HMF and levulinates in the bio-oil. Data obtained evidence that the highest yield of hydrochar is obtained at a 210 °C reaction temperature, 180 min residence time, 6/1 w/w orange peel waste to water ratio and a 3.6 initial pH. The bio-products distribution strongly depends on the applied reaction conditions. Overall, 180 °C was found to be the best reaction temperature that maximizes the production of furfural and 5-HMF in the presence of pure water as a reaction medium.

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Section: Introductionmentioning

confidence: 88%

Hydrothermal Carbonization as Sustainable Process for the Complete Upgrading of Orange Peel Waste into Value-Added Chemicals and Bio-Carbon Materials

et al. 2021

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“…et al, 2021;Zhang et al, 2022), dyes Lv et al, 2022), gases (Sultana et al, 2021), antibiotics (Qu et al, 2021), phenolic compounds (Marx et al, 2021;Pauletto et al, 2021), and so forth. In addition to being utilized in adsorption processes as an adsorbent, hydrochar is also used in other applications such as promoting anaerobic digestion in activated sludge (He et al, 2021;Shi et al, 2021), composite material applications (Nizamuddin et al, 2021), hydrogen gas production (Lin et al, 2021), biofuel applications (Zhang Z. et al, 2021), chemical sensing applications (Espro et al, 2021), and others.…”

Section: Hydrothermal Carbonization (Htc) Processmentioning

confidence: 99%

Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

Alharbi

Hameed

Alotaibi

et al. 2022

Front. Environ. Sci.

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Textile dyes are organic compounds that can pose an environmental threat if not properly treated. They can cause many problems ranging from human health, ecosystem disturbances, and the reduction of the esthetic value of water bodies. The adsorption process using activated carbon (AC) has been proven to be effective in treating dyes in wastewater. However, the production of AC is limited by the non-renewables and relatively expensive precursor of coal. Date palm residues (DPRs) provide a good alternative for AC’s precursor due to their continuous supply, availability in a large amount, and having good physiochemical properties such as high oxygen element and fixed carbon. This study provides a review of the potential of date palm residues (DPRs) as AC in adsorbing textile dyes and the recent technological advances adopted by researchers in producing DPR-based AC. This review article focuses solely on DPR and not on other biomass waste. This study presents a background review on date palms, textile dyes, biochar, and AC, followed by production methods of AC. In the literature, DPR was carbonized between 250 and 400°C. The conventional heating process employed an activation temperature of 576.85–900°C for physical activation and a maximum of 800°C for physicochemical activation. Chemical agents used in the chemical activation of DPR included NaOH, KOH, ZnCl2, H3PO4, and CaCl2. The maximum surface area obtained for DPR-AC was 1,092.34 and 950 m2/g for physical and chemical activation, respectively. On the other hand, conditions used in microwave heating were between 540 and 700 W, which resulted in a surface area of 1,123 m2/g. Hydrothermal carbonization (HTC) utilized carbonization temperatures between 150 and 250°C with pressure between 1 and 5 MPa, thus resulting in a surface area between 125.50 and 139.50 m2/g. Isotherm and kinetic models employed in the literature are also discussed, together with the explanation of parameters accompanied by these models. The conversion of DPR into AC was noticed to be more efficient with the advancement of activation methods over the years.

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“…In this work, we have synthesized fluorescent NBC in small size (<100 nm), endowed with graphene structure, by a simple HTC method and exfoliation procedure, starting from orange peel waste [ 30 , 31 ]. Then, in order to assess the possibility to use this nanomaterial as a smart nanocarrier for the targeted cancer cells delivery, different TL have been covalently conjugated to the graphene surface by means of a cleavable and biocompatible polyethylene glycol (PEG) linker [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Orange-Peel-Derived Nanobiochar for Targeted Cancer Therapy

Iannazzo

Celesti²,

Espro³

et al. 2022

Pharmaceutics

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Cancer-targeted drug delivery systems (DDS) based on carbon nanostructures have shown great promise in cancer therapy due to their ability to selectively recognize specific receptors overexpressed in cancer cells. In this paper, we have explored a green route to synthesize nanobiochar (NBC) endowed with graphene structure from the hydrothermal carbonization (HTC) of orange peels and evaluated the suitability of this nanomaterial as a nanoplatform for cancer therapy. In order to compare the cancer-targeting ability of different widely used targeting ligands (TL), we have conjugated NBC with biotin, riboflavin, folic acid and hyaluronic acid and have tested, in vitro, their biocompatibility and uptake ability towards a human alveolar cancer cell line (A549 cells). The nanosystems which showed the best biological performances—namely, the biotin- and riboflavin- conjugated systems—have been loaded with the poorly water-soluble drug DHF (5,5-dimethyl-6a-phenyl-3-(trimethylsilyl)-6,6a-dihydrofuro[3,2-b]furan-2(5H)-one) and tested for their anticancer activity. The in vitro biological tests demonstrated the ability of both systems to internalize the drug in A549 cells. In particular, the biotin-functionalized NBC caused cell death percentages to more than double with respect to the drug alone. The reported results also highlight the positive effect of the presence of oxygen-containing functional groups, present on the NBC surface, to improve the water dispersion stability of the DDS and thus make the approach of using this nanomaterial as nanocarrier for poorly water-soluble drugs effective.

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Orange peels-derived hydrochar for chemical sensing applications

Cited by 30 publications

References 64 publications

Hydrothermal Carbonization as Sustainable Process for the Complete Upgrading of Orange Peel Waste into Value-Added Chemicals and Bio-Carbon Materials

Hydrothermal Carbonization as Sustainable Process for the Complete Upgrading of Orange Peel Waste into Value-Added Chemicals and Bio-Carbon Materials

Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

Orange-Peel-Derived Nanobiochar for Targeted Cancer Therapy

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