Upcycling brewer's spent grain waste into activated carbon and carbon nanotubes for energy and other applications via two‐stage activation

Osman, Ahmed I.; O’Connor, Edward J.; McSpadden, Glenn; Abu‐Dahrieh, Jehad K.; Farrell, Charlie; Al-Muhtaseb, Ala’a H.; Harrison, John; Rooney, David

doi:10.1002/jctb.6220

Cited by 80 publications

(37 citation statements)

References 56 publications

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“…3, both samples show almost similar FTIR spectra, differences showed in their intensities and slightly shift suggesting very limited changes of the surface chemistry 25 . For both the AC and (P/Ti-1/2)15@AC, their spectra assigned the absorption band to the O-H stretching vibration (approximately 3400 cm −1 ) 27 , CH 2 and CH 3 (1460 cm −1 ) 28 , COOH (approximately 1090 cm −1 ), and C-H (at 875 cm −1 ) 29 , respectively. Be differently, AC showed adsorption band at 1640-1630 cm −1 , which belongs to the moisture peaks overlapped with C=C and C=O stretching in phenylpropanoid side chains, and aromatic skeleton vibration 30 .…”

Section: Surface Functional Groupsmentioning

confidence: 99%

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Co-blending modification of activated coke using pyrolusite and titanium ore for low-temperature NOx removal

Yang

Lai

et al. 2020

Sci Rep

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Activated coke (AC) has great potential in the field of low-temperature NO removal (DeNOx), especially the branch prepared by blending modification. In this study, the AC-based pyrolusite and/or titanium ore blended catalysts were prepared and applied for DeNOx. The results show blending pyrolusite and titanium ore promoted the catalytic performance of AC (Px@AC, Tix@AC) clearly, and the co-blending of two of them showed a synergistic effect. The (P/Ti-1/2)15@AC performed the highest NO conversion of 66.4%, improved 16.9% and 16.0% respectively compared with P15@AC and Ti15@AC. For the (P/Ti-1/2)15@AC DeNOx, its relative better porous structure (SBET = 364 m2/g, Vmic = 0.156 cm3/g) makes better mass transfer and more active sites exposure, stronger surface acidity (C–O, 19.43%; C=O, 4.16%) is more favorable to the NH3 adsorption, and Ti, Mn and Fe formed bridge structure fasted the lactic oxygen recovery and electron transfer. The DeNOx of (P/Ti-1/2)15@AC followed both the E–R and L–H mechanism, both the gaseous and adsorbed NO reacted with the activated NH3 due to the active sites provided by both the carbon and titanium.

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Section: Surface Functional Groupsmentioning

confidence: 99%

“…16 Table 4. Relative content of the surface functional groups before and after NO removal 28 . www.nature.com/scientificreports/ also makes the catalytic reaction continuable.…”

Section: Atomic Concentration (%)mentioning

confidence: 99%

Co-blending modification of activated coke using pyrolusite and titanium ore for low-temperature NOx removal

Yang

Lai

et al. 2020

Sci Rep

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“…Mesoporous carbon materials consider as promising targets for advanced applications due to their exceptional features, which enables them to engross universal apprehension over the last few decades (Qiang et al 2017;Zhang et al 2017c;Sevilla et al 2017;Wang et al 2006;Hooch Antink et al 2018). There are several physical arrangements for mesoporous carbons, containing nanoparticles (Górka and Jaroniec 2010;Lee et al 2011), nanosheets (Wang et al 2018a;Li et al 2017b;Ding et al 2013), nanotubes (Osman et al 2019a(Osman et al , 2020aGuo et al 2011), nanofibers (Wu et al 2015b), etc., which can adapt with several categories of industrial applications. Additionally, there are different pore size in the nanostructures of mesoporous carbons, including micropores, mesopores and macropores, which is of noteworthy prominence for their supercapacitor application.…”

Section: Carbon Materials For Supercapacitors Applicationsmentioning

confidence: 99%

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

et al. 2020

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Supercapacitors are increasingly used for energy conversion and storage systems in sustainable nanotechnologies. Graphite is a conventional electrode utilized in Li-ion-based batteries, yet its specific capacitance of 372 mA h g −1 is not adequate for supercapacitor applications. Interest in supercapacitors is due to their high-energy capacity, storage for a shorter period and longer lifetime. This review compares the following materials used to fabricate supercapacitors: spinel ferrites, e.g., MFe 2 O 4 , MMoO 4 and MCo 2 O 4 where M denotes a transition metal ion; perovskite oxides; transition metals sulfides; carbon materials; and conducting polymers. The application window of perovskite can be controlled by cations in sublattice sites. Cations increase the specific capacitance because cations possess large orbital valence electrons which grow the oxygen vacancies. Electrodes made of transition metal sulfides, e.g., ZnCo 2 S 4 , display a high specific capacitance of 1269 F g −1 , which is four times higher than those of transition metals oxides, e.g., Zn-Co ferrite, of 296 F g −1. This is explained by the low charge-transfer resistance and the high ion diffusion rate of transition metals sulfides. Composites made of magnetic oxides or transition metal sulfides with conducting polymers or carbon materials have the highest capacitance activity and cyclic stability. This is attributed to oxygen and sulfur active sites which foster electrolyte penetration during cycling, and, in turn, create new active sites.

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“…Among water treatment technologies, adsorption has shown to be an effective approach to remove several kinds of pollutants in water and as a result is the most widely used technology in water treatment processes [24][25][26]. Recently, carbon-rich materials have been used as adsorbents in water purification such as activated carbons [27][28][29][30], carbon nanotubes [25,[31][32][33][34][35], biochar [36][37][38][39], carbon fibers [40], and graphene oxides [41][42][43]. Furthermore, zeolites [44][45][46], silica [47][48][49] and clay-based nanocomposites [50][51][52] have also been employed as suitable materials in water treatment.…”

Section: Introduction To Magnetic Nanoparticlesmentioning

confidence: 99%

Insight on water remediation application using magnetic nanomaterials and biosorbents

Maksoud

Elgarahy

Farrell

et al. 2020

Coordination Chemistry Reviews

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234

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Adsorption to date is the most effective and utilized technology globally to remove several pollutants in wastewater. In this approach, many adsorbents have been synthesized, tested and used for the elimination and separation of the contaminants such as radionuclides, heavy metals, dyes and pharmaceutical compounds both at lab and industrial scale. However, there are many challenges to adsorption processes such as reducing the high cost, through means of separation of suspending adsorbents to be used again, as well as the ease to synthesize. Two methods that have shown promising results and gained significant interest is that of magnetic nanomaterials and biosorbents due to their effective, safe, eco-friendly, low cost and low-energy intensive material properties. Magnetic nanomaterials act as efficient adsorbents due to their ease of removal of contaminants from wastewater using an applied magnetic field but also their advantageous surface charge and redox activity characteristics. On the other hand, biosorbents have a synergistic effect with their efficient adsorption capacity to remove contaminants, high abundance and participation in waste minimization, helping alleviate ecological and environmental problems. This review highlights, discusses and reports on the state-of-the-art of these two promising routes to adsorption and provides indications as to what are the optimum materials for utilization and insight into their efficiency, reusability and practicality for the removal of pollutants from wastewater streams. Some of the main material focuses are zero-valent iron, iron oxides, spinel ferrites, natural and waste-based biosorbents.

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Upcycling brewer's spent grain waste into activated carbon and carbon nanotubes for energy and other applications via two‐stage activation

Cited by 80 publications

References 56 publications

Co-blending modification of activated coke using pyrolusite and titanium ore for low-temperature NOx removal

Co-blending modification of activated coke using pyrolusite and titanium ore for low-temperature NOx removal

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

Insight on water remediation application using magnetic nanomaterials and biosorbents

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