Photoluminescence of MCM meso-porous materials
Source abstract
Abstract
Abstract Different photoluminescence (PL) techniques have been used to study the emission of light from MCM-41 and MCM-48. It was found that the intensity of PL is enhanced after rapid thermal annealing (RTA). This enhancement is explained by the generation of the oxygen-related defects according to the surface properties. Through the analysis of PL with RTA and photoluminescence excitation (PLE), we suggest that the NBOHC and the twofold coordinated silicon centers are responsible for the red and blue–green PL of MCM meso-porous materials, respectively. The PL intensity in MCM meso-porous materials degrades with time during photoexcitation. The dominant mechanism of PL degradation involves the formation of the chemisorbed oxygen-related complexes on the surface, which are adsorbed onto the surface and act as an efficient quencher of PL.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mesoporous Materials and Catalysis · Silicon Nanostructures and Photoluminescence · Aerogels and thermal insulation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
Show source-provided references
1. Ordered mesoporous molecular sieves synthesized by a liquid–crystal template mechanism10.1038/359710a0 ↗
2. Nanoporous materials10.1166/jnn.2002.151 ↗
3. Ordered mesoporous materials10.1016/S1387-1811(98)00249-2 ↗
4. Non-silica periodic mesostructured materials: recent progress10.1016/S0927-6513(97)00059-X ↗
5. Recent advances in processing and characterization of periodic mesoporous MCM-41 silicate molecular sieves10.1021/ie0010666 ↗
6. Modification of MCM-41 by surface silylation with trimethylchlorosilane and adsorption study10.1021/jp972788m ↗
7. Study of the efficiency of visible-light photocatalytic degradation of basic blue adsorbed on pure and doped mesoporous titania films10.1021/la0103620 ↗
8. Excited-state dynamics of 5,10,15,20-tetraphenyl-21H,23H-porphine manganese(III) chloride encapsulated in TiMCM-41 and MCM41; proved by fs-diffuse reflectance laser photolysis10.1021/jp0116757 ↗
9. Arrays of (ZnMn)S quantum wires with well-defined diameters below 10 nm10.1063/1.1530721 ↗
10. SiGe quantum dots prepared on an ordered mesoporous silica coated Si substrate10.1063/1.120085 ↗
11. Studies of C60 and C70 incorporated in cubic mesoporous silica (MCM-48)10.1016/S0009-2614(99)01363-9 ↗
12. Photoluminescence properties of MCM-41 molecules sieves10.1016/S1387-1811(97)00004-8 ↗
13. Photoluminescence from mesoporous silica akin to that from nanoscale silicon: the nature of light emitters10.1016/S0009-2614(02)00400-1 ↗
14. Applications of photoluminescence techniques to the characterization of solid surfaces in relation to adsorption, catalysis, and photocatalysis10.1016/S0360-0564(08)60513-1 ↗
15. The very strong photoluminescence (PL) effect of mesoporous molecular sieve materials10.1016/S0968-5677(98)00066-2 ↗
16. Red-light emission in MCM-41 meso-porous nanotubes10.1016/S0038-1098(02)00051-0 ↗
17. Photoluminescence from mesoporous silica: similarity of properties to porous silicon10.1063/1.1328364 ↗
18. Photoluminescence of mesoporous silica molecular sieves10.1063/1.1304929 ↗
19. Strong visible photoluminescence from SiO2 nanotubes at room temperature10.1063/1.1370991 ↗
20. Photoluminescence spectroscopy of silica-based mesoporous materials10.1021/jp0009599 ↗
21. Synthesis of MCM-48 via phase transformation with direct addition of NaF and enhancement of hydrothermal stability by post-treatment in NaF solution10.1016/S1387-1811(01)00410-3 ↗
22. Temperature control in the synthesis of cubic mesoporous silica materials10.1016/S0167-577X(00)00117-8 ↗
23. Novel synthesis of spherical MCM-4810.1016/S1387-1811(98)00254-6 ↗
24. Red and near-infrared photoluminescence from silica-based nanoscale materials: experimental investigation and quantum-chemical modeling10.1063/1.1425382 ↗
25. Cathodoluminescence microcharacterization of the defect structure of irradiated hydrated and anhydrous fused silicon dioxide10.1103/PhysRevB.57.5674 ↗
26. Optically active oxygen-deficiency-related centers in amorphous silicon dioxide10.1016/S0022-3093(98)00720-0 ↗
27. The origin of the intrinsic 1.9 eV luminescence band in glassy SiO210.1016/0022-3093(94)90684-X ↗
28. Bright visible photoluminescence from silica nanotube flakes prepared by the sol–gel template method10.1063/1.1434309 ↗
29. Generation and recombination of defects in vitreous silica induced by irradiation with a near-infrared femtosecond laser10.1021/jp992828h ↗
30. Comprehensive study of surface chemistry of MCM-41 using 29Si CP/MAS NMR, FTIR, Pyridine-TPD, and TGA10.1021/jp971366+ ↗
31. Active sites on mesoporous and amorphous silica materials and their photocatalytic activity: an investigation by FTIR, ESR, VUV-UV and photoluminescence spectroscopies10.1021/jp025768f ↗
32. Defect pair creation through ultraviolet radiation indense, amorphous SiO210.1103/PhysRevB.42.2617 ↗
33. Determination of the visible range optical absorption spectrum of peroxy radicals in gamma-irradiated fused silica10.1016/S0022-3093(98)00721-2 ↗
34. Blue–green photoluminescence in MCM-41 mesoporous nanotubes10.1088/0953-8984/15/20/101 ↗
35. Photoabsorption and photoluminescence of divalent defects in silicate and germanosilicate glasses: first-principles calculations10.1103/PhysRevB.55.R15993 ↗
36. Isoelectronic seriesof twofold coordinated Si, Ge, and Sn atoms in glassy SiO2: a luminescence study10.1016/0022-3093(92)90056-P ↗
37. On the origin of the 5.0 and 7.6 eV absorption bands in oxygen deficient α-quartz and amorphous silica. A first principles quantum-chemical study10.1016/S0022-3093(97)00221-4 ↗
38. Photoluminescence sites on MCM-4810.1016/j.micromeso.2003.08.001 ↗
39. Quenching of the photoluminescence of porous vycor glass by oxygen and ammonia10.1039/f19807601014 ↗
40. Luminescence quantum efficiency of nanocrystalline ZnS:Mn2+. 2. Enhancement by UV irradiation10.1021/jp010757s ↗