Large Optical Nonlinearity of the Activated Carbon Nanoparticles Prepared by Laser Ablation

Abstract

Carbon nanoparticles (CNPs) with high porosity and great optical features can be used as a luminescent material. One year later, the same group investigated the NLO properties CNPs and boron-doped CNPs by 532 nm and 1064 nm laser excitations to uncover the underlying physical mechanisms in their NLO response. Hence, a facile approach, laser ablation technique, was employed for carbon nanoparticles (CNPs) synthesis from suspended activated carbon (AC). Morphological properties of the prepared CNPs were studied by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). UV-Vis and fluorescence (FL) spectra were used to optical properties investigation of CNPs. The size distribution of nanoparticles was evaluated using dynamic light scattering (DLS). The nonlinear optical (NLO) coefficients of the synthesized CNPs were determined by the Z-scan method. As a result, strong reverse saturable absorption and self-defocusing effects were observed at the excitation wavelength of 442 nm laser irradiation. These effects were ascribed to the presence of delocalized π-electrons in AC CNPs. To the best of our knowledge, this is the first study investigating the NLO properties of the AC CNPs.

Zero‐waste emission design of sustainable and programmable actuators

“…Raman spectroscopy was performed to identify the presence of carbon nano‐powders in the composite films and the chemical state of carbon. Two broad bands were identified at 1340 cm −1 (D‐band) and 1596 cm −1 (G‐band) in the Raman spectrum (Figure S4), corresponding to disorder‐induced sp 3 ‐hybridized carbon and two‐dimensional hexagonal lattice sp 2 ‐hybridized carbon, respectively 42–45 . Furthermore, the structural order and graphitization degree were evaluated by the intensity ratio of the D‐band and G‐band ( I D / I G ).…”

“…Two broad bands were identified at 1340 cm −1 (D-band) and 1596 cm −1 (G-band) in the Raman spectrum (Figure S4), corresponding to disorder-induced sp 3 -hybridized carbon and two-dimensional hexagonal lattice sp 2 -hybridized carbon, respectively. [42][43][44][45] Furthermore, the structural order and graphitization degree were evaluated by the intensity ratio of the D-band and G-band (I D /I G ). The calculated result was 1.09, implying that the content of sp 3 -hybridization is higher than that of sp 2 -hybridization in our carbon nano-powders.…”

Applications of Carbon Dots for the Photocatalytic and Electrocatalytic Reduction of CO2

“…Alternatively, GDQs can be obtained by laser ablation, which consists of removing material from a solid surface by irradiating with a laser beam [ 36 ]. Carbon sources that have been employed to obtain GQDs following this method include graphite immersed in polyethyleneimine (PEI) and ethylenediamine (EDA) [ 37 ], activated carbon suspended in n-heptane [ 38 ], or solid carbon immersed in acetone [ 39 ]. Moreover, acidic oxidation is the treatment of graphene oxide, soot, coal, carbon black, or activated carbon with an oxidizing agent at temperatures of 60–100 °C, which exposes the edge sites from which the carbon material is exfoliated.…”

Carbonaceous materials for removal and recovery of phosphate species: Limitations, successes and future improvement

“…AC is a versatile adsorbent with high adsorption capacity depending on its high surface area and porous nature with a standard application in water purification to remove organic and inorganic pollutants (Hassani and Khataee, 2017;Orooji et al, 2021). AC can be manufactured from several biomass or fossil-based feedstock such as banana waste, coconut shell, rice husk, and coal (Kalderis et al, 2008;Khataee, A.R., Aber, S., Zarei, M., Sheydaei, 2011).…”