Preparation of photoluminescent carbon nitride dots from CCl4 and 1,2-ethylenediamine: a heat-treatment-based strategy

Abstract

In this communication, we report on our recent finding that photoluminescent carbon nitride dots (CNDs) can be prepared by a simple heat-treatment-based strategy for the first time. It suggests the CNDs thus obtained exhibit strong fluorescence. The formation of such CNDs can be attributed to the polymerization of CCl 4 and 1,2ethylenediamine under reflux, microwave, or solvothermal heating.

Novel synthesis of Au nanoparticles using fluorescent carbon nitride dots as photocatalyst

“…3d) exhibits three peaks at 398.5, 399.4, and 400.6 eV, which are associated with the C-N-C, N-(C) 3 , and N-H groups, respectively [33]. The XPS spectrum data are consistent with that of CNDs reported by our previous work [22] and prove the existence of CNDs in the product. The XPS data further confirm the formation of CNDs/ AuNPs [34].…”

“…The zeta potential of AuNPs was measured as 8.35 mV as a positive net charge, which can be attributed to the adsorption of positively charged CNDs. The discrepancy of the zeta potential between AuNPs and CNDs (27.2 mV) [22] is due to the simultaneous adsorption of negatively charged counterions, i.e., Cl − ions, on AuNPs [26]. The observation of zeta potential at charge stoichiometry being still positive of incomplete charge neutralization is due to the stabilized assembly charge caused by steric factors [27].…”

“…The XPS spectra of the nanoparticles are shown in Fig. 3 [22]. The Au4 f , C 1s , and N 1s regions were analyzed using the peak deconvolution method.…”

“…The photoluminescent CNDs were prepared following our previous work [22] by the polymerization of CCl 4 and EDA under reflux heating. CCl 4 and EDA are used as carbon and nitrogen sources, respectively.…”

“…[15][16][17][18][19][20][21]. More recently, photoluminescent carbon nitride dots (CNDs) have been easily prepared by the polymerization of CCl 4 and 1,2-ethylenediamine (EDA) under reflux, microwave, or solvothermal heating [22]. In this paper, we demonstrate a novel application of such CNDs as an effective photocatalyst to synthesize AuNPs for the first time, carried out by UV irradiation of an aqueous HAuCl 4 solution in the presence of ethanol and CNDs.…”