Hydrothermal Synthesis of Carbon Microspheres from Glucose: Tuning Sphere Size by Adding Oxalic Acid

Liu, Jie; Tian, Peng; Ye, Junwei; Zhou, Li; Weitao, Gong; Lin, Yen‐Chung; Ning, Guiling

doi:10.1246/cl.2009.948

Cited by 19 publications

(11 citation statements)

References 14 publications

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“…The comparison of SEM images revealed that the average particle size of the CMSs enhanced by increasing the citric acid concentration. These results were in good agreement with those reported by Liu et al [29], who found that larger CMSs can be obtained by increasing oxalic acid concentration in glucose solution.…”

Section: Physicochemical Characteristics Of Cmsssupporting

confidence: 93%

Hydrothermal synthesis of carbon microspheres from sucrose with citric acid as a catalyst: physicochemical and structural properties

Sulistya

Hui-Hui

Attenborough

et al. 2020

Journal of Taibah University for Science

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The production of size-tunable Carbon microspheres (CMSs) from cheaply available materials using an environmentally friendly technique is highly appreciated. In this study, size-tunable CMSs were hydrothermally synthesized at 190°C using sucrose as carbon source, and citric acid as a catalyst. The effect of varying citric acid concentration on the size of the microspheres was investigated. Results indicated that under similar hydrothermal conditions, variation in the concentration of citric acid between 0 and 5 wt.% increased the size of CMSs ranging from 3.12 to 11.2 μm, as evidenced by SEM and particle size analyzer. TGA confirmed the purity of the carbonaceous particles in a single-step degradation with the presence of D-band and G-band in Raman spectra. FTIR and elemental analyzer confirmed the presence of hydrophilic oxygen functionalities such as -OH, -C = O, and COOH on the surface of CMSs. This study opens a novel and straightforward approach to produce size-tunable CMSs with functional groups.

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Section: Physicochemical Characteristics Of Cmsssupporting

confidence: 93%

Hydrothermal synthesis of carbon microspheres from sucrose with citric acid as a catalyst: physicochemical and structural properties

Sulistya

Hui-Hui

Attenborough

et al. 2020

Journal of Taibah University for Science

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“…Saccharides are among the precursor materials which are non-toxic and easily carbonized without catalysts [7,19,31]. Among these, glucose [32,33] and sucrose [8] are convenient precursors.…”

Section: Discussionmentioning

confidence: 99%

“…Carbon nanofoams usually consist of agglomerations of porous nano-or micron-sized spheres. Such so-called nanoor micro-pearls have been produced by various methods such as laser ablation [48][49][50], chemical vapor deposition (CVD) [39,[51][52][53][54][55][56][57][58][59][60] or hydrothermal carbonization (HTC) [30][31][32][33]46,[61][62][63][64][65][66][67]. In this paper, we show that morphologies other than micropearls can be synthesized just by changing the process parameters.…”

Section: Discussionmentioning

confidence: 99%

Diamond-Like Carbon Nanofoam from Low-Temperature Hydrothermal Carbonization of a Sucrose/Naphthalene Precursor Solution

Frese

Mitchell

Bowers

et al. 2017

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Unusual structure of low-density carbon nanofoam, different from the commonly observed micropearl morphology, was obtained by hydrothermal carbonization (HTC) of a sucrose solution where a specific small amount of naphthalene had been added. Helium-ion microscopy (HIM) was used to obtain images of the foam yielding micron-sized, but non-spherical particles as structural units with a smooth foam surface. Raman spectroscopy shows a predominant sp 2 peak, which results from the graphitic internal structure. A strong sp 3 peak is seen in X-ray photoelectron spectroscopy (XPS). Electrons in XPS are emitted from the near surface region which implies that the graphitic microparticles have a diamond-like foam surface layer. The occurrence of separated sp 2 and sp 3 regions is uncommon for carbon nanofoams and reveals an interesting bulk-surface structure of the compositional units.

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“…Carbon nano-and microspheres are of great interest both from the scientific point of view, and for possible practical applications [1][2][3]. In particular, they can be used in biomedicine, in catalysis, in gas and liquid filters, fuel cells, supercapacitors, composite materials, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The carbon spheres, depending on their synthesis method and the precursor, may vary in the internal structure and physical characteristics [3][4][5][6][7][8]. In our previous research [9], carbon microspheres with a diameter of ~3 µm having a strong signal of electron paramagnetic resonance (EPR) were obtained by solid-phase pyrolysis of metal-free phthalocyanine (MFPc) H 2 C 32 N 8 H 16 .…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of carbon microspheres prepared by solid-phase pyrolysis of organic compounds

Manukyan¹,

Mirzakhanyan²,

Khachaturyan³

et al. 2015

J. Contemp. Phys.

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Abstract⎯Carbon microspheres with a mean diameter of 3-3.5 µm were prepared by solid-phase pyrolysis of polyethylene and metal-free phthalocyanine. Morphology, structure and magnetic properties of the samples were investigated by electron microscopy, Raman spectroscopy, magnetometry and electron paramagnetic resonance. Carbon microspheres are composed of graphitic nanocrystallites with longitudinal sizes of 10-15 nm. The samples reveal strong paramagnetism, which in the case of metal-free phthalocyanine pyrolysis is 3 times higher (~5×10 19 spin/g) due to the unpaired spins of impurity nitrogen atoms.

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Hydrothermal Synthesis of Carbon Microspheres from Glucose: Tuning Sphere Size by Adding Oxalic Acid

Cited by 19 publications

References 14 publications

Hydrothermal synthesis of carbon microspheres from sucrose with citric acid as a catalyst: physicochemical and structural properties

Hydrothermal synthesis of carbon microspheres from sucrose with citric acid as a catalyst: physicochemical and structural properties

Diamond-Like Carbon Nanofoam from Low-Temperature Hydrothermal Carbonization of a Sucrose/Naphthalene Precursor Solution

Structure and magnetic properties of carbon microspheres prepared by solid-phase pyrolysis of organic compounds

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