Controlled synthesis and photocatalytic performance of biocompatible uniform carbon quantum dots with microwave absorption capacity

2020 ◽  
Vol 512 ◽  
pp. 145751 ◽  
Author(s):  
Hanqi Zhang ◽  
Hong Wang ◽  
Ying Wang ◽  
Baifu Xin
Keyword(s):  
Quantum Dots ◽  
Microwave Absorption ◽  
Photocatalytic Performance ◽  
Carbon Quantum Dots ◽  
Absorption Capacity ◽  
Controlled Synthesis

Carbon quantum dots enhance the photocatalytic performance of BiVO4 with different exposed facets

2013 ◽  
Vol 42 (18) ◽  
pp. 6285 ◽  
Author(s):  
Di Tang ◽  
Hengchao Zhang ◽  
Hui Huang ◽  
Ruihua Liu ◽  
Yuzhi Han ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Performance ◽  
Carbon Quantum Dots ◽  
Exposed Facets

Carbon quantum dots/attapulgite nanocomposites with enhanced photocatalytic performance for desulfurization

2017 ◽  
Vol 29 (4) ◽  
pp. 2709-2715 ◽  
Author(s):  
Sujuan Ma ◽  
Xiazhang Li ◽  
Xiaowang Lu ◽  
Shixiang Zuo ◽  
Zhongyu Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Performance ◽  
Carbon Quantum Dots

scholarly journals Removal of methyl orange (MO) using carbon quantum dots (CQDs) derived from watermelon rinds

2019 ◽  
Vol 6 (1) ◽  
pp. 91-99
Author(s):  
Azrina Abd Aziz ◽  
U.R. Ramzilah
Keyword(s):  
Quantum Dots ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Carbon Quantum Dots ◽  
Facile Hydrothermal Method ◽  
X Ray ◽  
Degradation Activity ◽  
Scanning Electron

In this study, carbon quantum dots (CQDs) was prepared via a facile hydrothermal method. The objective for this study is to assess the performance of CQDs in photocatalytic degradation activity of methyl orange (MO) under artificial visible light source. For that reason, the prepared photocatalyst undergo further characterization by scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDX) and UV- Vis spectrophotometer (UV-VIS) to verify the morphology structure of the photocatalyst, elemental composition as well as the absorbance intensity, respectively. The results indicates that the prepared photocatalyst possess irregular porous shape with nanometre (nm) dimensions that can escalate the surface area for photocatalytic degradation activity. The elements of the photocatalyst mainly consist of carbon and oxygen as the major constituents in which necessary for photocatalytic activity with intense peak of absorbance intensity. The prepared CQDs also shows an excellent photocatalytic performance over the MO with degradation rate of 68.9% within 120 minutes.

scholarly journals Developing a magnetic nanocomposite adsorbent based on carbon quantum dots prepared from Pomegranate peel for the removal of Pb(II) and Cd(II) ions from aqueous solution

2021 ◽  
Vol 4 (03) ◽  
pp. 33-46
Author(s):  
Hamideh Asadollahzadeh ◽  
Mahdiyeh Ghazizadeh ◽  
Mohammad Manzari
Keyword(s):  
Quantum Dots ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Carbon Quantum Dots ◽  
Absorption Capacity ◽  
Good Choice ◽  
Batch Adsorption ◽  
Pomegranate Peel ◽  
Flame Atomic Absorption ◽  
Vis Spectroscopy

Agriculture waste is a good choice for the production of carbon dots owing to its abundance, wide availability, eco-friendly nature. In this study a novel magnetic bioadsorbent based on carbon quantum dots (Fe3O4-PPCQDs) from Pomegranate peel (PP) was used as adsorbent to remove lead (Pb) and cadmium (Cd) from 50 mL of water and wastewater samples by magnetic solid phase extraction (MSPE). After adsorption ions with Fe3O4-PPCQDs at pH=6, the concentration of Pb(II) and Cd (II) ions were determined by flame atomic absorption spectrometry (F-AAS). The manufactured of Fe3O4-PPCQDs and GO nanostructures were structurally characterized by scanning electron microscopy (SEM),  and Fourier transform infrared spectroscopy (FT-IR). The quantum dots were optically characterized by UV–Vis spectroscopy. Batch adsorption experiment was conducted to examine the effects of pH, contact time, temperature and initial concentration of Pb(II) and Cd(II) from the water. The preconcentration factor and LOD for Cd and Pb were obtained 50, and (1.3 μg L-1; 15.5 μg L-1), respectively. The equilibrium data of ions sorption were well described by Langmuir and Freundlich model. The R2 values obtained by Langmuir model were higher. The absorption capacity of Fe3O4-PPCQDs for cadmium and lead were obtained 17.92 and 23.75 mg g-1, respectively. 

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