Multi-functional carbon dots from simple precursors: An excellent heavy metal ions sensor with photocatalytic activity in aqueous environment

Carbon Dots: A Multifunctional Nano‐Sized Giant Tool for the Detection Probe and Physical Reformation of NiMoO4 in Solid‐State for Enriched Energy Storage Application

“…The HR‐XPS spectrum of C1s ( Figure a) deconvoluted into three different peaks at a binding energy of 284.6, 285.7, and 286.5 eV, which correspond to the C═C, C─N, and C─O groups that exist in the CDs. [ 5 ] Next, the HR‐XPS spectra of N1s spectrum (Figure 3b) reveal the presence of nitrogen‐based function groups at 397.5 eV concerning C─N, then the fitted peak at 393.9 eV represents C═N, and 399.8 eV confirms the ─NH 2 moieties. [ 21 ] Then, the O1s (Figure 3c) HR‐XPS shows different peaks at 531.3, 532.1, and 535.1 eV corresponding to the C─O, C═O, and O─C═O functional moieties in the CDs.…”

“…In the case of the PL-based approach, even a large number of samples can be analyzed rapidly. [4,5] Apart from water threads, generating and storing energy through renewable modes was the foremost demand to guard the globe against warming and reduce fossil fuel utilization. Conversely, the necessity for null greenhouse gas-emitting portable electronic vehicles is more hyped.…”

“…The sudden growth of multiple industries directly affects the environment's surface and groundwater bodies. [ 5 ] Among that, most water is contaminated by heavy metal ions. Hexavalent chromium is a highly carcinogenic metal ion that rapidly affects ground and surface water.…”

“…In the case of the PL‐based approach, even a large number of samples can be analyzed rapidly. [ 4,5 ]…”

Simple devising of N-doped carbon dots (N-CDs) as a low-cost probe for selective environmental toxin detection and security applications

“…With these Stern–Volmer plots, we observed satisfactory linearity for various nitro-aromatics. The Stern–Volmer quenching constants ( K sv ) for various nitro-aromatic compounds were calculated from eqn (2): 49,50 I 0 / I = 1 + K sv [Q]where I 0 and I denote the fluorescence intensities in the presence or absence of quenching agent [Q]. A linear relation of R 2 = 0.97 was determined from the linear series of the fluorescence response, whereby 1–26 μM (Fig.…”