Synthesis and photocatalytic CO2 reduction performance of Cu2O/Coal-based carbon nanoparticle composites

Zhang, Dedong; Maimaiti, Halidan; Awati, Abuduheiremu; Yisilamu, Gunisakezi; Sun, Fei; Wei, Ming

doi:10.1016/j.cplett.2018.04.007

Cited by 32 publications

(23 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among them, the peak position of FCNPs‐HE is slightly lower and the diffraction peak is wider; also, there are many hetero peaks, indicating that the size of the coal‐based FCNPs prepared by the H 2 O 2 etching method is larger than the FCNPs prepared by organic solvent extraction method and the mixed acid/ultrasonic oxidation method. Besides that, FCNPs‐HE contains aliphatics and minerals, and these are also higher than the other two samples , which is consistent with the TEM and EDS test results. It may be because that H 2 O 2 not only oxidizes and exfoliates the aromatic hydrocarbons in coal, and also oxidizes the aliphatics or ethers linked on them, and breaks these bonds, so that it exfoliates to the products with other inorganic particles.…”

Section: Resultssupporting

confidence: 87%

“…Among them, the polycyclic aromatic hydrocarbons linked with aromatic small molecules was exfoliated and oxygen‐containing groups such as ─COOH or ─OH attached on them and these molecules dissolved in water to form coal‐based FCNPs dispersion with multilayered graphene sp 2 carbon fragment structure. In our previous work, we synthesized coal‐based FCNPs by H 2 O 2 etching method and combined with Cu 2 O and Ag, respectively. The as‐prepared composite photocatalysts exhibited excellent photocatalytic CO 2 reduction performance under the illumination of the visible light.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A comparative study on the preparation methods and properties of coal‐based fluorescent carbon nanoparticles

Awati

Maimaiti

et al. 2019

Surface & Interface Analysis

Self Cite

View full text Add to dashboard Cite

Fluorescent carbon nanoparticles (FCNPs) have broad application prospects in the fields of bioimaging, ion detection, and photocatalysis. In this paper, coal-based FCNPs were prepared by using mixed acid oxidation, hydrogen peroxide etching, and organic solvent extraction methods (marked as FCNPs-AO, FCNPs-HE, and FCNPs-OS, respectively), and the structures and properties of the as-prepared products were compared. It was found that the coal-based FCNPs obtained by three kinds of methods are all aromatic structural nanomaterials linked with oxygen-containing groups. Among them, FCNPs-AO is a kind of hollow annular spherical particles and FCNPs-HE and FCNPs-OS are solid spherical particles. These FCNPs not only have similar fluorescence properties as traditional quantum dots, but also can be photoexcited to generate photogenerated electrons and holes, and it can also suppress the recombination of photogenerated electrons and holes by using its own surface defects. In particular, the electron transport capability of the FCNPs-AO is stronger than that of FCNPs-HE and FCNPs-OS because of its lower charge transfer impedance, so it can be excited to generate more photogenerated electrons and has the best photogenerated carrier separation efficiency. KEYWORDScoal, fluorescent carbon nanoparticles, H 2 O 2 etching method, mixed acid oxidation method, organic solvent extraction method

show abstract

Section: Resultssupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

A comparative study on the preparation methods and properties of coal‐based fluorescent carbon nanoparticles

Awati

Maimaiti

et al. 2019

Surface & Interface Analysis

Self Cite

View full text Add to dashboard Cite

show abstract

“…The fourth stage happened at near 551 C with a loss amount of 28.28%, corresponding to the condensation dehydrogenation of the aromatic structure into semicoke. 16 Above 600 C, there was 57.30% undecomposed remnant, which was made up of the graphitized carbon and a small amount of inorganic particles in NH 2 -CNPs. 26 The TG-DTG results further prove that the CNPs were successfully aminated.…”

Section: Structure Of Nh 2 -Cnpsmentioning

confidence: 99%

“…12 The crystalline carbon regions are abundant and each crystalline carbon has the size of a quantum dot, suitable for obtaining CNPs by various methods. 13,14 In our previous study, [15][16][17] we prepared coal-based CNPs used HNO 3 pretreated coal samples from the Wucaiwan coalmine in Xinjiang, China. We stripped crystalline carbon from the coal by acid oxidation and hydrogen peroxide oxidation methods and linked oxygen-containing groups such as hydroxyl groups on the CNPs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photocatalytic CO₂ reduction performance of aminated coal-based carbon nanoparticles

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Specifically, E g was obtained from the intersection of the tangent of the starting curve with the hν axis. 20 …”

Section: Methodsmentioning

confidence: 99%

Cu/ZnV₂O₄ Heterojunction Interface Promoted Methanol and Ethanol Generation from CO₂ and H₂O under UV–Vis Light Irradiation

Gao

et al. 2022

ACS Omega

View full text Add to dashboard Cite

Adopting the concurrent reduction of Cu 2 O during hydrothermal preparation of ZnV 2 O 4 , metal–semiconductor heterojunction Cu/ZnV 2 O 4 nanorods were synthesized and applied to the catalytic generation of methanol and ethanol from CO 2 aerated water under UV–vis light irradiation. 10Cu/ZnV 2 O 4 obtained from 10 wt % composite amount of Cu 2 O exhibited a total carbon yield of 6.49 μmol·g –1 ·h –1 . The yield of CH 3 OH and C 2 H 5 OH reached 3.30 and 0.86 μmol·g –1 ·h –1 , respectively. 2.5Cu/ZnV 2 O 4 displayed the highest ethanol yield of 1.58 μmol·g –1 ·h –1 due to the strong absorption in the visible light. Cu/ZnV 2 O 4 was characterized using X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–vis) spectra, photoluminescence (PL) spectra, transient photocurrent response, and electrochemical impedance spectroscopy (EIS). Results showed that composite Cu 0 -ZnV 2 O 4 increased the surface area and tuned the energy band position, which matches the reaction potential toward methanol and ethanol. The photocatalytic activity toward CH 3 OH and C 2 H 5 OH on Cu/ZnV 2 O 4 is attributed to faster transmission and a slow recombination rate of photogenerated carriers at the heterojunction interface. Multielectron reactions for the production of CH 3 OH and C 2 H 5 OH are promoted. Free radical capture experiments indicated that the active species boost the reaction in the order of • OH > e – > h + .

show abstract

Synthesis and photocatalytic CO2 reduction performance of Cu2O/Coal-based carbon nanoparticle composites

Cited by 32 publications

References 47 publications

A comparative study on the preparation methods and properties of coal‐based fluorescent carbon nanoparticles

A comparative study on the preparation methods and properties of coal‐based fluorescent carbon nanoparticles

Synthesis and photocatalytic CO₂ reduction performance of aminated coal-based carbon nanoparticles

Cu/ZnV₂O₄ Heterojunction Interface Promoted Methanol and Ethanol Generation from CO₂ and H₂O under UV–Vis Light Irradiation

Contact Info

Product

Resources

About

Synthesis and photocatalytic CO2 reduction performance of Cu2O/Coal-based carbon nanoparticle composites

Cited by 32 publications

References 47 publications

A comparative study on the preparation methods and properties of coal‐based fluorescent carbon nanoparticles

A comparative study on the preparation methods and properties of coal‐based fluorescent carbon nanoparticles

Synthesis and photocatalytic CO2 reduction performance of aminated coal-based carbon nanoparticles

Cu/ZnV2O4 Heterojunction Interface Promoted Methanol and Ethanol Generation from CO2 and H2O under UV–Vis Light Irradiation

Contact Info

Product

Resources

About

Synthesis and photocatalytic CO₂ reduction performance of aminated coal-based carbon nanoparticles

Cu/ZnV₂O₄ Heterojunction Interface Promoted Methanol and Ethanol Generation from CO₂ and H₂O under UV–Vis Light Irradiation