Melem: an efficient metal-free luminescent material

Abstract

Melem: a highly efficient metal-free blue-emitting phosphor, easy to synthesize and abundant in reserve.

Photophysics and Photocatalysis of Melem: A Spectroscopic Reinvestigation

“…XRD, FTIR Spectroscopy,and ElementalAnalysis Characterization of Melem Figure 1s hows the XRD patterns of as-synthesized melem, hot-water-washed melem,a nd melem, alongw ith those of melaminea nd g-CN for reference. The XRD pattern of as-synthesized melem in this work is consistent with the reported XRD pattern of as-synthesized melem, [14,18,19] and the XRD pattern of hot-water-washed melem is consistent with that of DMSO-soluble melem [14] and dehydrated melem ( Figure 1). [21] The clear difference in the XRD patternsb etween as-synthesized and hot-water-washed melem indicates that the as-synthesized melem contains ac ertain amount of melamine and that hot water can remove unreacted melamine from the assynthesized melem.A ccording to the reported method,t he hot-water-washed melem was further boiled with HCl and then with as olution of NaOH, [22] and finally melem powerw as obtained.…”

“…For the photophysical properties of melem,t here are inconsistencies, such as its fluorescenced ecay lifetime and fluorescence spectrum. [12,[16][17][18][19][20] Therefore, as ystematic investigation into the photophysical properties of melem is still in need to correctly understand its photocatalytic mechanism and related heptazine-based materials.…”

“…For comparison with the photophysicald ata of melem presented in the literature, [14,[16][17][18][19] herein, purified and unpurified melem were characterized by XRD, FTIR spectroscopy,e lement analysis, UV/Vis diffuse reflectance spectroscopy (UVDRS), fluorescences pectroscopy,a nd fluorescenced ecay lifetime measurements. The spectroscopicp roperties of the precursor melamine and its thermal condensation product g-CN were reexamined.…”

Design and Synthesis of Spherical Multicomponent Aggregates Composed of Core–Shell, Yolk–Shell, and Hollow Nanospheres and Their Lithium‐Ion Storage Performances

“…[31] The Sn 3d 3/2 and 3d 5/2 orbital peaks at 495.0 and 486.7 eV, respectively, confirmed the formation of CoSnO 3 phase. [32,33] The Co 2p spectrum revealed two major peaks at 780.1 and 795.5 eV, corresponding to Co 2p 3/2 and Co 2p 1/2 , respectively, [ 34,35] Moreover, the area ratio of Co 3+ to Co 2+ was estimated to be 2:1, suggesting that the Sn-Sn 2 Co 3 @CoSnO 3 (Figure 6a,b, respectively). The Sn 3d 3/2 and 3d 5/2 peaks at 495.0 and 486.7 eV, respectively, confirmed the formation of CoSnO 3 phase.…”

“…The Sn 3d 3/2 and 3d 5/2 peaks at 495.0 and 486.7 eV, respectively, confirmed the formation of CoSnO 3 phase. [32,33] The Co 2p spectrum revealed two major peaks at 780.1 and 795.5 eV, corresponding to Co 2p 3/2 and Co 2p 1/2 , respectively, with two shake-up satellites (denoted as "Sat. "), which are the characteristic peaks of cubic-phase Co 3 O 4 .…”